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Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux 

The merge is merely to fix conflicts before sending a pull request.

Conflicts:
	drivers/power/ab8500_btemp.c
	drivers/power/ab8500_charger.c
	drivers/power/ab8500_fg.c
	drivers/power/abx500_chargalg.c
	drivers/power/max8925_power.c

Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
This commit is contained in:
Anton Vorontsov 2012-12-11 22:15:57 -08:00
parent eba3b670a9 1ebaf4f4e6
commit 76d8a23b12
3228 changed files with 96075 additions and 116903 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
CREDITS
View File

@ -1823,6 +1823,11 @@ S: Kattreinstr 38
S: D-64295
S: Germany
N: Avi Kivity
E: avi.kivity@gmail.com
D: Kernel-based Virtual Machine (KVM)
S: Ra'annana, Israel
N: Andi Kleen
E: andi@firstfloor.org
U: http://www.halobates.de

24
Documentation/ABI/testing/sysfs-bus-iio
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@ -189,6 +189,14 @@ Description:
A computed peak value based on the sum squared magnitude of
the underlying value in the specified directions.
What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_raw
What: /sys/bus/iio/devices/iio:deviceX/in_pressure_raw
KernelVersion: 3.8
Contact: linux-iio@vger.kernel.org
Description:
Raw pressure measurement from channel Y. Units after
application of scale and offset are kilopascal.
What: /sys/bus/iio/devices/iio:deviceX/in_accel_offset
What: /sys/bus/iio/devices/iio:deviceX/in_accel_x_offset
What: /sys/bus/iio/devices/iio:deviceX/in_accel_y_offset
@ -197,6 +205,8 @@ What: /sys/bus/iio/devices/iio:deviceX/in_voltageY_offset
What: /sys/bus/iio/devices/iio:deviceX/in_voltage_offset
What: /sys/bus/iio/devices/iio:deviceX/in_tempY_offset
What: /sys/bus/iio/devices/iio:deviceX/in_temp_offset
What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_offset
What: /sys/bus/iio/devices/iio:deviceX/in_pressure_offset
KernelVersion: 2.6.35
Contact: linux-iio@vger.kernel.org
Description:
@ -226,6 +236,8 @@ What: /sys/bus/iio/devices/iio:deviceX/in_magn_scale
What: /sys/bus/iio/devices/iio:deviceX/in_magn_x_scale
What: /sys/bus/iio/devices/iio:deviceX/in_magn_y_scale
What: /sys/bus/iio/devices/iio:deviceX/in_magn_z_scale
What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_scale
What: /sys/bus/iio/devices/iio:deviceX/in_pressure_scale
KernelVersion: 2.6.35
Contact: linux-iio@vger.kernel.org
Description:
@ -245,6 +257,8 @@ What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibbias
What: /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibbias
What: /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibbias
What: /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibbias
What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibbias
What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibbias
KernelVersion: 2.6.35
Contact: linux-iio@vger.kernel.org
Description:
@ -262,6 +276,8 @@ What /sys/bus/iio/devices/iio:deviceX/in_anglvel_y_calibscale
What /sys/bus/iio/devices/iio:deviceX/in_anglvel_z_calibscale
what /sys/bus/iio/devices/iio:deviceX/in_illuminance0_calibscale
what /sys/bus/iio/devices/iio:deviceX/in_proximity0_calibscale
What: /sys/bus/iio/devices/iio:deviceX/in_pressureY_calibscale
What: /sys/bus/iio/devices/iio:deviceX/in_pressure_calibscale
KernelVersion: 2.6.35
Contact: linux-iio@vger.kernel.org
Description:
@ -275,6 +291,8 @@ What: /sys/.../iio:deviceX/in_voltage-voltage_scale_available
What: /sys/.../iio:deviceX/out_voltageX_scale_available
What: /sys/.../iio:deviceX/out_altvoltageX_scale_available
What: /sys/.../iio:deviceX/in_capacitance_scale_available
What: /sys/.../iio:deviceX/in_pressure_scale_available
What: /sys/.../iio:deviceX/in_pressureY_scale_available
KernelVersion: 2.6.35
Contact: linux-iio@vger.kernel.org
Description:
@ -694,6 +712,8 @@ What: /sys/.../buffer/scan_elements/in_voltageY_en
What: /sys/.../buffer/scan_elements/in_voltageY-voltageZ_en
What: /sys/.../buffer/scan_elements/in_incli_x_en
What: /sys/.../buffer/scan_elements/in_incli_y_en
What: /sys/.../buffer/scan_elements/in_pressureY_en
What: /sys/.../buffer/scan_elements/in_pressure_en
KernelVersion: 2.6.37
Contact: linux-iio@vger.kernel.org
Description:
@ -707,6 +727,8 @@ What: /sys/.../buffer/scan_elements/in_voltageY_type
What: /sys/.../buffer/scan_elements/in_voltage_type
What: /sys/.../buffer/scan_elements/in_voltageY_supply_type
What: /sys/.../buffer/scan_elements/in_timestamp_type
What: /sys/.../buffer/scan_elements/in_pressureY_type
What: /sys/.../buffer/scan_elements/in_pressure_type
KernelVersion: 2.6.37
Contact: linux-iio@vger.kernel.org
Description:
@ -751,6 +773,8 @@ What: /sys/.../buffer/scan_elements/in_magn_z_index
What: /sys/.../buffer/scan_elements/in_incli_x_index
What: /sys/.../buffer/scan_elements/in_incli_y_index
What: /sys/.../buffer/scan_elements/in_timestamp_index
What: /sys/.../buffer/scan_elements/in_pressureY_index
What: /sys/.../buffer/scan_elements/in_pressure_index
KernelVersion: 2.6.37
Contact: linux-iio@vger.kernel.org
Description:

44
Documentation/ABI/testing/sysfs-class-devfreq
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@ -11,7 +11,7 @@ What: /sys/class/devfreq/.../governor
Date: September 2011
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Description:
The /sys/class/devfreq/.../governor shows the name of the
The /sys/class/devfreq/.../governor show or set the name of the
governor used by the corresponding devfreq object.
What: /sys/class/devfreq/.../cur_freq
@ -19,15 +19,16 @@ Date: September 2011
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Description:
The /sys/class/devfreq/.../cur_freq shows the current
frequency of the corresponding devfreq object.
frequency of the corresponding devfreq object. Same as
target_freq when get_cur_freq() is not implemented by
devfreq driver.
What: /sys/class/devfreq/.../central_polling
Date: September 2011
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
What: /sys/class/devfreq/.../target_freq
Date: September 2012
Contact: Rajagopal Venkat <rajagopal.venkat@linaro.org>
Description:
The /sys/class/devfreq/.../central_polling shows whether
the devfreq ojbect is using devfreq-provided central
polling mechanism or not.
The /sys/class/devfreq/.../target_freq shows the next governor
predicted target frequency of the corresponding devfreq object.
What: /sys/class/devfreq/.../polling_interval
Date: September 2011
@ -43,6 +44,17 @@ Description:
(/sys/class/devfreq/.../central_polling is 0), this value
may be useless.
What: /sys/class/devfreq/.../trans_stat
Date: October 2012
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
Descrtiption:
This ABI shows the statistics of devfreq behavior on a
specific device. It shows the time spent in each state and
the number of transitions between states.
In order to activate this ABI, the devfreq target device
driver should provide the list of available frequencies
with its profile.
What: /sys/class/devfreq/.../userspace/set_freq
Date: September 2011
Contact: MyungJoo Ham <myungjoo.ham@samsung.com>
@ -50,3 +62,19 @@ Description:
The /sys/class/devfreq/.../userspace/set_freq shows and
sets the requested frequency for the devfreq object if
userspace governor is in effect.
What: /sys/class/devfreq/.../available_frequencies
Date: October 2012
Contact: Nishanth Menon <nm@ti.com>
Description:
The /sys/class/devfreq/.../available_frequencies shows
the available frequencies of the corresponding devfreq object.
This is a snapshot of available frequencies and not limited
by the min/max frequency restrictions.
What: /sys/class/devfreq/.../available_governors
Date: October 2012
Contact: Nishanth Menon <nm@ti.com>
Description:
The /sys/class/devfreq/.../available_governors shows
currently available governors in the system.

31
Documentation/ABI/testing/sysfs-devices-power
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@ -204,3 +204,34 @@ Description:
This attribute has no effect on system-wide suspend/resume and
hibernation.
What: /sys/devices/.../power/pm_qos_no_power_off
Date: September 2012
Contact: Rafael J. Wysocki <rjw@sisk.pl>
Description:
The /sys/devices/.../power/pm_qos_no_power_off attribute
is used for manipulating the PM QoS "no power off" flag. If
set, this flag indicates to the kernel that power should not
be removed entirely from the device.
Not all drivers support this attribute. If it isn't supported,
it is not present.
This attribute has no effect on system-wide suspend/resume and
hibernation.
What: /sys/devices/.../power/pm_qos_remote_wakeup
Date: September 2012
Contact: Rafael J. Wysocki <rjw@sisk.pl>
Description:
The /sys/devices/.../power/pm_qos_remote_wakeup attribute
is used for manipulating the PM QoS "remote wakeup required"
flag. If set, this flag indicates to the kernel that the
device is a source of user events that have to be signaled from
its low-power states.
Not all drivers support this attribute. If it isn't supported,
it is not present.
This attribute has no effect on system-wide suspend/resume and
hibernation.

14
Documentation/ABI/testing/sysfs-devices-sun Normal file
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@ -0,0 +1,14 @@
Whatt: /sys/devices/.../sun
Date: October 2012
Contact: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Description:
The file contains a Slot-unique ID which provided by the _SUN
method in the ACPI namespace. The value is written in Advanced
Configuration and Power Interface Specification as follows:
"The _SUN value is required to be unique among the slots of
the same type. It is also recommended that this number match
the slot number printed on the physical slot whenever possible."
So reading the sysfs file, we can identify a physical position
of the slot in the system.

112
Documentation/ABI/testing/sysfs-tty
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@ -26,3 +26,115 @@ Description:
UART port in serial_core, that is bound to TTY like ttyS0.
uartclk = 16 * baud_base
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/type
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
Shows the current tty type for this port.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/line
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
Shows the current tty line number for this port.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/port
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
Shows the current tty port I/O address for this port.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/irq
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
Shows the current primary interrupt for this port.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/flags
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
Show the tty port status flags for this port.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/xmit_fifo_size
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
Show the transmit FIFO size for this port.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/close_delay
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
Show the closing delay time for this port in ms.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/closing_wait
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
Show the close wait time for this port in ms.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/custom_divisor
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
Show the custom divisor if any that is set on this port.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/io_type
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
Show the I/O type that is to be used with the iomem base
address.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/iomem_base
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
The I/O memory base for this port.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.
What: /sys/class/tty/ttyS0/iomem_reg_shift
Date: October 2012
Contact: Alan Cox <alan@linux.intel.com>
Description:
Show the register shift indicating the spacing to be used
for accesses on this iomem address.
These sysfs values expose the TIOCGSERIAL interface via
sysfs rather than via ioctls.

2
Documentation/DocBook/gadget.tmpl
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@ -671,7 +671,7 @@ than a kernel driver.
<para>There's a USB Mass Storage class driver, which provides
a different solution for interoperability with systems such
as MS-Windows and MacOS.
That <emphasis>File-backed Storage</emphasis> driver uses a
That <emphasis>Mass Storage</emphasis> driver uses a
file or block device as backing store for a drive,
like the <filename>loop</filename> driver.
The USB host uses the BBB, CB, or CBI versions of the mass

56
Documentation/DocBook/uio-howto.tmpl
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@ -719,6 +719,62 @@ framework to set up sysfs files for this region. Simply leave it alone.
</para>
</sect1>
<sect1 id="using uio_dmem_genirq">
<title>Using uio_dmem_genirq for platform devices</title>
<para>
In addition to statically allocated memory ranges, they may also be
a desire to use dynamically allocated regions in a user space driver.
In particular, being able to access memory made available through the
dma-mapping API, may be particularly useful. The
<varname>uio_dmem_genirq</varname> driver provides a way to accomplish
this.
</para>
<para>
This driver is used in a similar manner to the
<varname>"uio_pdrv_genirq"</varname> driver with respect to interrupt
configuration and handling.
</para>
<para>
Set the <varname>.name</varname> element of
<varname>struct platform_device</varname> to
<varname>"uio_dmem_genirq"</varname> to use this driver.
</para>
<para>
When using this driver, fill in the <varname>.platform_data</varname>
element of <varname>struct platform_device</varname>, which is of type
<varname>struct uio_dmem_genirq_pdata</varname> and which contains the
following elements:
</para>
<itemizedlist>
<listitem><varname>struct uio_info uioinfo</varname>: The same
structure used as the <varname>uio_pdrv_genirq</varname> platform
data</listitem>
<listitem><varname>unsigned int *dynamic_region_sizes</varname>:
Pointer to list of sizes of dynamic memory regions to be mapped into
user space.
</listitem>
<listitem><varname>unsigned int num_dynamic_regions</varname>:
Number of elements in <varname>dynamic_region_sizes</varname> array.
</listitem>
</itemizedlist>
<para>
The dynamic regions defined in the platform data will be appended to
the <varname> mem[] </varname> array after the platform device
resources, which implies that the total number of static and dynamic
memory regions cannot exceed <varname>MAX_UIO_MAPS</varname>.
</para>
<para>
The dynamic memory regions will be allocated when the UIO device file,
<varname>/dev/uioX</varname> is opened.
Simiar to static memory resources, the memory region information for
dynamic regions is then visible via sysfs at
<varname>/sys/class/uio/uioX/maps/mapY/*</varname>.
The dynmaic memory regions will be freed when the UIO device file is
closed. When no processes are holding the device file open, the address
returned to userspace is ~0.
</para>
</sect1>
</chapter>
<chapter id="userspace_driver" xreflabel="Writing a driver in user space">

34
Documentation/IRQ-domain.txt
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@ -7,6 +7,21 @@ systems with multiple interrupt controllers the kernel must ensure
that each one gets assigned non-overlapping allocations of Linux
IRQ numbers.
The number of interrupt controllers registered as unique irqchips
show a rising tendency: for example subdrivers of different kinds
such as GPIO controllers avoid reimplementing identical callback
mechanisms as the IRQ core system by modelling their interrupt
handlers as irqchips, i.e. in effect cascading interrupt controllers.
Here the interrupt number loose all kind of correspondence to
hardware interrupt numbers: whereas in the past, IRQ numbers could
be chosen so they matched the hardware IRQ line into the root
interrupt controller (i.e. the component actually fireing the
interrupt line to the CPU) nowadays this number is just a number.
For this reason we need a mechanism to separate controller-local
interrupt numbers, called hardware irq's, from Linux IRQ numbers.
The irq_alloc_desc*() and irq_free_desc*() APIs provide allocation of
irq numbers, but they don't provide any support for reverse mapping of
the controller-local IRQ (hwirq) number into the Linux IRQ number
@ -40,6 +55,10 @@ required hardware setup.
When an interrupt is received, irq_find_mapping() function should
be used to find the Linux IRQ number from the hwirq number.
The irq_create_mapping() function must be called *atleast once*
before any call to irq_find_mapping(), lest the descriptor will not
be allocated.
If the driver has the Linux IRQ number or the irq_data pointer, and
needs to know the associated hwirq number (such as in the irq_chip
callbacks) then it can be directly obtained from irq_data->hwirq.
@ -119,4 +138,17 @@ numbers.
Most users of legacy mappings should use irq_domain_add_simple() which
will use a legacy domain only if an IRQ range is supplied by the
system and will otherwise use a linear domain mapping.
system and will otherwise use a linear domain mapping. The semantics
of this call are such that if an IRQ range is specified then
descriptors will be allocated on-the-fly for it, and if no range is
specified it will fall through to irq_domain_add_linear() which meand
*no* irq descriptors will be allocated.
A typical use case for simple domains is where an irqchip provider
is supporting both dynamic and static IRQ assignments.
In order to avoid ending up in a situation where a linear domain is
used and no descriptor gets allocated it is very important to make sure
that the driver using the simple domain call irq_create_mapping()
before any irq_find_mapping() since the latter will actually work
for the static IRQ assignment case.

2
Documentation/RCU/RTFP.txt
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@ -186,7 +186,7 @@ Bibtex Entries
@article{Kung80
,author="H. T. Kung and Q. Lehman"
,title="Concurrent Maintenance of Binary Search Trees"
,title="Concurrent Manipulation of Binary Search Trees"
,Year="1980"
,Month="September"
,journal="ACM Transactions on Database Systems"

17
Documentation/RCU/checklist.txt
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@ -271,15 +271,14 @@ over a rather long period of time, but improvements are always welcome!
The same cautions apply to call_rcu_bh() and call_rcu_sched().
9. All RCU list-traversal primitives, which include
rcu_dereference(), list_for_each_entry_rcu(),
list_for_each_continue_rcu(), and list_for_each_safe_rcu(),
must be either within an RCU read-side critical section or
must be protected by appropriate update-side locks. RCU
read-side critical sections are delimited by rcu_read_lock()
and rcu_read_unlock(), or by similar primitives such as
rcu_read_lock_bh() and rcu_read_unlock_bh(), in which case
the matching rcu_dereference() primitive must be used in order
to keep lockdep happy, in this case, rcu_dereference_bh().
rcu_dereference(), list_for_each_entry_rcu(), and
list_for_each_safe_rcu(), must be either within an RCU read-side
critical section or must be protected by appropriate update-side
locks. RCU read-side critical sections are delimited by
rcu_read_lock() and rcu_read_unlock(), or by similar primitives
such as rcu_read_lock_bh() and rcu_read_unlock_bh(), in which
case the matching rcu_dereference() primitive must be used in
order to keep lockdep happy, in this case, rcu_dereference_bh().
The reason that it is permissible to use RCU list-traversal
primitives when the update-side lock is held is that doing so

2
Documentation/RCU/listRCU.txt
View File

@ -205,7 +205,7 @@ RCU ("read-copy update") its name. The RCU code is as follows:
audit_copy_rule(&ne->rule, &e->rule);
ne->rule.action = newaction;
ne->rule.file_count = newfield_count;
list_replace_rcu(e, ne);
list_replace_rcu(&e->list, &ne->list);
call_rcu(&e->rcu, audit_free_rule);
return 0;
}

61
Documentation/RCU/rcuref.txt
View File

@ -20,7 +20,7 @@ release_referenced() delete()
{ {
... write_lock(&list_lock);
atomic_dec(&el->rc, relfunc) ...
... delete_element
... remove_element
} write_unlock(&list_lock);
...
if (atomic_dec_and_test(&el->rc))
@ -52,7 +52,7 @@ release_referenced() delete()
{ {
... spin_lock(&list_lock);
if (atomic_dec_and_test(&el->rc)) ...
call_rcu(&el->head, el_free); delete_element
call_rcu(&el->head, el_free); remove_element
... spin_unlock(&list_lock);
} ...
if (atomic_dec_and_test(&el->rc))
@ -64,3 +64,60 @@ Sometimes, a reference to the element needs to be obtained in the
update (write) stream. In such cases, atomic_inc_not_zero() might be
overkill, since we hold the update-side spinlock. One might instead
use atomic_inc() in such cases.
It is not always convenient to deal with "FAIL" in the
search_and_reference() code path. In such cases, the
atomic_dec_and_test() may be moved from delete() to el_free()
as follows:
1. 2.
add() search_and_reference()
{ {
alloc_object rcu_read_lock();
... search_for_element
atomic_set(&el->rc, 1); atomic_inc(&el->rc);
spin_lock(&list_lock); ...
add_element rcu_read_unlock();
... }
spin_unlock(&list_lock); 4.
} delete()
3. {
release_referenced() spin_lock(&list_lock);
{ ...
... remove_element
if (atomic_dec_and_test(&el->rc)) spin_unlock(&list_lock);
kfree(el); ...
... call_rcu(&el->head, el_free);
} ...
5. }
void el_free(struct rcu_head *rhp)
{
release_referenced();
}
The key point is that the initial reference added by add() is not removed
until after a grace period has elapsed following removal. This means that
search_and_reference() cannot find this element, which means that the value
of el->rc cannot increase. Thus, once it reaches zero, there are no
readers that can or ever will be able to reference the element. The
element can therefore safely be freed. This in turn guarantees that if
any reader finds the element, that reader may safely acquire a reference
without checking the value of the reference counter.
In cases where delete() can sleep, synchronize_rcu() can be called from
delete(), so that el_free() can be subsumed into delete as follows:
4.
delete()
{
spin_lock(&list_lock);
...
remove_element
spin_unlock(&list_lock);
...
synchronize_rcu();
if (atomic_dec_and_test(&el->rc))
kfree(el);
...
}

384
Documentation/RCU/trace.txt
View File

@ -10,51 +10,63 @@ for rcutree and next for rcutiny.
CONFIG_TREE_RCU and CONFIG_TREE_PREEMPT_RCU debugfs Files and Formats
These implementations of RCU provides several debugfs files under the
These implementations of RCU provide several debugfs directories under the
top-level directory "rcu":
rcu/rcudata:
rcu/rcu_bh
rcu/rcu_preempt
rcu/rcu_sched
Each directory contains files for the corresponding flavor of RCU.
Note that rcu/rcu_preempt is only present for CONFIG_TREE_PREEMPT_RCU.
For CONFIG_TREE_RCU, the RCU flavor maps onto the RCU-sched flavor,
so that activity for both appears in rcu/rcu_sched.
In addition, the following file appears in the top-level directory:
rcu/rcutorture. This file displays rcutorture test progress. The output
of "cat rcu/rcutorture" looks as follows:
rcutorture test sequence: 0 (test in progress)
rcutorture update version number: 615
The first line shows the number of rcutorture tests that have completed
since boot. If a test is currently running, the "(test in progress)"
string will appear as shown above. The second line shows the number of
update cycles that the current test has started, or zero if there is
no test in progress.
Within each flavor directory (rcu/rcu_bh, rcu/rcu_sched, and possibly
also rcu/rcu_preempt) the following files will be present:
rcudata:
Displays fields in struct rcu_data.
rcu/rcudata.csv:
Comma-separated values spreadsheet version of rcudata.
rcu/rcugp:
rcuexp:
Displays statistics for expedited grace periods.
rcugp:
Displays grace-period counters.
rcu/rcuhier:
rcuhier:
Displays the struct rcu_node hierarchy.
rcu/rcu_pending:
rcu_pending:
Displays counts of the reasons rcu_pending() decided that RCU had
work to do.
rcu/rcutorture:
Displays rcutorture test progress.
rcu/rcuboost:
rcuboost:
Displays RCU boosting statistics. Only present if
CONFIG_RCU_BOOST=y.
The output of "cat rcu/rcudata" looks as follows:
The output of "cat rcu/rcu_preempt/rcudata" looks as follows:
rcu_sched:
0 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=545/1/0 df=50 of=0 ql=163 qs=NRW. kt=0/W/0 ktl=ebc3 b=10 ci=153737 co=0 ca=0
1 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=967/1/0 df=58 of=0 ql=634 qs=NRW. kt=0/W/1 ktl=58c b=10 ci=191037 co=0 ca=0
2 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=1081/1/0 df=175 of=0 ql=74 qs=N.W. kt=0/W/2 ktl=da94 b=10 ci=75991 co=0 ca=0
3 c=20942 g=20943 pq=1 pgp=20942 qp=1 dt=1846/0/0 df=404 of=0 ql=0 qs=.... kt=0/W/3 ktl=d1cd b=10 ci=72261 co=0 ca=0
4 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=369/1/0 df=83 of=0 ql=48 qs=N.W. kt=0/W/4 ktl=e0e7 b=10 ci=128365 co=0 ca=0
5 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=381/1/0 df=64 of=0 ql=169 qs=NRW. kt=0/W/5 ktl=fb2f b=10 ci=164360 co=0 ca=0
6 c=20972 g=20973 pq=1 pgp=20973 qp=0 dt=1037/1/0 df=183 of=0 ql=62 qs=N.W. kt=0/W/6 ktl=d2ad b=10 ci=65663 co=0 ca=0
7 c=20897 g=20897 pq=1 pgp=20896 qp=0 dt=1572/0/0 df=382 of=0 ql=0 qs=.... kt=0/W/7 ktl=cf15 b=10 ci=75006 co=0 ca=0
rcu_bh:
0 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=545/1/0 df=6 of=0 ql=0 qs=.... kt=0/W/0 ktl=ebc3 b=10 ci=0 co=0 ca=0
1 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=967/1/0 df=3 of=0 ql=0 qs=.... kt=0/W/1 ktl=58c b=10 ci=151 co=0 ca=0
2 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=1081/1/0 df=6 of=0 ql=0 qs=.... kt=0/W/2 ktl=da94 b=10 ci=0 co=0 ca=0
3 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=1846/0/0 df=8 of=0 ql=0 qs=.... kt=0/W/3 ktl=d1cd b=10 ci=0 co=0 ca=0
4 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=369/1/0 df=6 of=0 ql=0 qs=.... kt=0/W/4 ktl=e0e7 b=10 ci=0 co=0 ca=0
5 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=381/1/0 df=4 of=0 ql=0 qs=.... kt=0/W/5 ktl=fb2f b=10 ci=0 co=0 ca=0
6 c=1480 g=1480 pq=1 pgp=1480 qp=0 dt=1037/1/0 df=6 of=0 ql=0 qs=.... kt=0/W/6 ktl=d2ad b=10 ci=0 co=0 ca=0
7 c=1474 g=1474 pq=1 pgp=1473 qp=0 dt=1572/0/0 df=8 of=0 ql=0 qs=.... kt=0/W/7 ktl=cf15 b=10 ci=0 co=0 ca=0
0!c=30455 g=30456 pq=1 qp=1 dt=126535/140000000000000/0 df=2002 of=4 ql=0/0 qs=N... b=10 ci=74572 nci=0 co=1131 ca=716
1!c=30719 g=30720 pq=1 qp=0 dt=132007/140000000000000/0 df=1874 of=10 ql=0/0 qs=N... b=10 ci=123209 nci=0 co=685 ca=982
2!c=30150 g=30151 pq=1 qp=1 dt=138537/140000000000000/0 df=1707 of=8 ql=0/0 qs=N... b=10 ci=80132 nci=0 co=1328 ca=1458
3 c=31249 g=31250 pq=1 qp=0 dt=107255/140000000000000/0 df=1749 of=6 ql=0/450 qs=NRW. b=10 ci=151700 nci=0 co=509 ca=622
4!c=29502 g=29503 pq=1 qp=1 dt=83647/140000000000000/0 df=965 of=5 ql=0/0 qs=N... b=10 ci=65643 nci=0 co=1373 ca=1521
5 c=31201 g=31202 pq=1 qp=1 dt=70422/0/0 df=535 of=7 ql=0/0 qs=.... b=10 ci=58500 nci=0 co=764 ca=698
6!c=30253 g=30254 pq=1 qp=1 dt=95363/140000000000000/0 df=780 of=5 ql=0/0 qs=N... b=10 ci=100607 nci=0 co=1414 ca=1353
7 c=31178 g=31178 pq=1 qp=0 dt=91536/0/0 df=547 of=4 ql=0/0 qs=.... b=10 ci=109819 nci=0 co=1115 ca=969
The first section lists the rcu_data structures for rcu_sched, the second
for rcu_bh. Note that CONFIG_TREE_PREEMPT_RCU kernels will have an
additional section for rcu_preempt. Each section has one line per CPU,
or eight for this 8-CPU system. The fields are as follows:
This file has one line per CPU, or eight for this 8-CPU system.
The fields are as follows:
o The number at the beginning of each line is the CPU number.
CPUs numbers followed by an exclamation mark are offline,
@ -64,11 +76,13 @@ o The number at the beginning of each line is the CPU number.
substantially larger than the number of actual CPUs.
o "c" is the count of grace periods that this CPU believes have
completed. Offlined CPUs and CPUs in dynticks idle mode may
lag quite a ways behind, for example, CPU 6 under "rcu_sched"
above, which has been offline through not quite 40,000 RCU grace
periods. It is not unusual to see CPUs lagging by thousands of
grace periods.
completed. Offlined CPUs and CPUs in dynticks idle mode may lag
quite a ways behind, for example, CPU 4 under "rcu_sched" above,
which has been offline through 16 RCU grace periods. It is not
unusual to see offline CPUs lagging by thousands of grace periods.
Note that although the grace-period number is an unsigned long,
it is printed out as a signed long to allow more human-friendly
representation near boot time.
o "g" is the count of grace periods that this CPU believes have
started. Again, offlined CPUs and CPUs in dynticks idle mode
@ -84,30 +98,25 @@ o "pq" indicates that this CPU has passed through a quiescent state
CPU has not yet reported that fact, (2) some other CPU has not
yet reported for this grace period, or (3) both.
o "pgp" indicates which grace period the last-observed quiescent
state for this CPU corresponds to. This is important for handling
the race between CPU 0 reporting an extended dynticks-idle
quiescent state for CPU 1 and CPU 1 suddenly waking up and
reporting its own quiescent state. If CPU 1 was the last CPU
for the current grace period, then the CPU that loses this race
will attempt to incorrectly mark CPU 1 as having checked in for
the next grace period!
o "qp" indicates that RCU still expects a quiescent state from
this CPU. Offlined CPUs and CPUs in dyntick idle mode might
well have qp=1, which is OK: RCU is still ignoring them.
o "dt" is the current value of the dyntick counter that is incremented
when entering or leaving dynticks idle state, either by the
scheduler or by irq. This number is even if the CPU is in
dyntick idle mode and odd otherwise. The number after the first
"/" is the interrupt nesting depth when in dyntick-idle state,
or one greater than the interrupt-nesting depth otherwise.
The number after the second "/" is the NMI nesting depth.
when entering or leaving idle, either due to a context switch or
due to an interrupt. This number is even if the CPU is in idle
from RCU's viewpoint and odd otherwise. The number after the
first "/" is the interrupt nesting depth when in idle state,
or a large number added to the interrupt-nesting depth when
running a non-idle task. Some architectures do not accurately
count interrupt nesting when running in non-idle kernel context,
which can result in interesting anomalies such as negative
interrupt-nesting levels. The number after the second "/"
is the NMI nesting depth.
o "df" is the number of times that some other CPU has forced a
quiescent state on behalf of this CPU due to this CPU being in
dynticks-idle state.
idle state.
o "of" is the number of times that some other CPU has forced a
quiescent state on behalf of this CPU due to this CPU being
@ -120,9 +129,13 @@ o "of" is the number of times that some other CPU has forced a
error, so it makes sense to err conservatively.
o "ql" is the number of RCU callbacks currently residing on
this CPU. This is the total number of callbacks, regardless
of what state they are in (new, waiting for grace period to
start, waiting for grace period to end, ready to invoke).
this CPU. The first number is the number of "lazy" callbacks
that are known to RCU to only be freeing memory, and the number
after the "/" is the total number of callbacks, lazy or not.
These counters count callbacks regardless of what phase of
grace-period processing that they are in (new, waiting for
grace period to start, waiting for grace period to end, ready
to invoke).
o "qs" gives an indication of the state of the callback queue
with four characters:
@ -150,6 +163,43 @@ o "qs" gives an indication of the state of the callback queue
If there are no callbacks in a given one of the above states,
the corresponding character is replaced by ".".
o "b" is the batch limit for this CPU. If more than this number
of RCU callbacks is ready to invoke, then the remainder will
be deferred.
o "ci" is the number of RCU callbacks that have been invoked for
this CPU. Note that ci+nci+ql is the number of callbacks that have
been registered in absence of CPU-hotplug activity.
o "nci" is the number of RCU callbacks that have been offloaded from
this CPU. This will always be zero unless the kernel was built
with CONFIG_RCU_NOCB_CPU=y and the "rcu_nocbs=" kernel boot
parameter was specified.
o "co" is the number of RCU callbacks that have been orphaned due to
this CPU going offline. These orphaned callbacks have been moved
to an arbitrarily chosen online CPU.
o "ca" is the number of RCU callbacks that have been adopted by this
CPU due to other CPUs going offline. Note that ci+co-ca+ql is
the number of RCU callbacks registered on this CPU.
Kernels compiled with CONFIG_RCU_BOOST=y display the following from
/debug/rcu/rcu_preempt/rcudata:
0!c=12865 g=12866 pq=1 qp=1 dt=83113/140000000000000/0 df=288 of=11 ql=0/0 qs=N... kt=0/O ktl=944 b=10 ci=60709 nci=0 co=748 ca=871
1 c=14407 g=14408 pq=1 qp=0 dt=100679/140000000000000/0 df=378 of=7 ql=0/119 qs=NRW. kt=0/W ktl=9b6 b=10 ci=109740 nci=0 co=589 ca=485
2 c=14407 g=14408 pq=1 qp=0 dt=105486/0/0 df=90 of=9 ql=0/89 qs=NRW. kt=0/W ktl=c0c b=10 ci=83113 nci=0 co=533 ca=490
3 c=14407 g=14408 pq=1 qp=0 dt=107138/0/0 df=142 of=8 ql=0/188 qs=NRW. kt=0/W ktl=b96 b=10 ci=121114 nci=0 co=426 ca=290
4 c=14405 g=14406 pq=1 qp=1 dt=50238/0/0 df=706 of=7 ql=0/0 qs=.... kt=0/W ktl=812 b=10 ci=34929 nci=0 co=643 ca=114
5!c=14168 g=14169 pq=1 qp=0 dt=45465/140000000000000/0 df=161 of=11 ql=0/0 qs=N... kt=0/O ktl=b4d b=10 ci=47712 nci=0 co=677 ca=722
6 c=14404 g=14405 pq=1 qp=0 dt=59454/0/0 df=94 of=6 ql=0/0 qs=.... kt=0/W ktl=e57 b=10 ci=55597 nci=0 co=701 ca=811
7 c=14407 g=14408 pq=1 qp=1 dt=68850/0/0 df=31 of=8 ql=0/0 qs=.... kt=0/W ktl=14bd b=10 ci=77475 nci=0 co=508 ca=1042
This is similar to the output discussed above, but contains the following
additional fields:
o "kt" is the per-CPU kernel-thread state. The digit preceding
the first slash is zero if there is no work pending and 1
otherwise. The character between the first pair of slashes is
@ -184,35 +234,51 @@ o "ktl" is the low-order 16 bits (in hexadecimal) of the count of
This field is displayed only for CONFIG_RCU_BOOST kernels.
o "b" is the batch limit for this CPU. If more than this number
of RCU callbacks is ready to invoke, then the remainder will
be deferred.
o "ci" is the number of RCU callbacks that have been invoked for
this CPU. Note that ci+ql is the number of callbacks that have
been registered in absence of CPU-hotplug activity.
The output of "cat rcu/rcu_preempt/rcuexp" looks as follows:
o "co" is the number of RCU callbacks that have been orphaned due to
this CPU going offline. These orphaned callbacks have been moved
to an arbitrarily chosen online CPU.
s=21872 d=21872 w=0 tf=0 wd1=0 wd2=0 n=0 sc=21872 dt=21872 dl=0 dx=21872
o "ca" is the number of RCU callbacks that have been adopted due to
other CPUs going offline. Note that ci+co-ca+ql is the number of
RCU callbacks registered on this CPU.
These fields are as follows:
There is also an rcu/rcudata.csv file with the same information in
comma-separated-variable spreadsheet format.
o "s" is the starting sequence number.
o "d" is the ending sequence number. When the starting and ending
numbers differ, there is an expedited grace period in progress.
o "w" is the number of times that the sequence numbers have been
in danger of wrapping.
o "tf" is the number of times that contention has resulted in a
failure to begin an expedited grace period.
o "wd1" and "wd2" are the number of times that an attempt to
start an expedited grace period found that someone else had
completed an expedited grace period that satisfies the
attempted request. "Our work is done."
o "n" is number of times that contention was so great that
the request was demoted from an expedited grace period to
a normal grace period.
o "sc" is the number of times that the attempt to start a
new expedited grace period succeeded.
o "dt" is the number of times that we attempted to update
the "d" counter.
o "dl" is the number of times that we failed to update the "d"
counter.
o "dx" is the number of times that we succeeded in updating
the "d" counter.
The output of "cat rcu/rcugp" looks as follows:
The output of "cat rcu/rcu_preempt/rcugp" looks as follows:
rcu_sched: completed=33062 gpnum=33063
rcu_bh: completed=464 gpnum=464
completed=31249 gpnum=31250 age=1 max=18
Again, this output is for both "rcu_sched" and "rcu_bh". Note that
kernels built with CONFIG_TREE_PREEMPT_RCU will have an additional
"rcu_preempt" line. The fields are taken from the rcu_state structure,
and are as follows:
These fields are taken from the rcu_state structure, and are as follows:
o "completed" is the number of grace periods that have completed.
It is comparable to the "c" field from rcu/rcudata in that a
@ -220,44 +286,42 @@ o "completed" is the number of grace periods that have completed.
that the corresponding RCU grace period has completed.
o "gpnum" is the number of grace periods that have started. It is
comparable to the "g" field from rcu/rcudata in that a CPU
whose "g" field matches the value of "gpnum" is aware that the
corresponding RCU grace period has started.
similarly comparable to the "g" field from rcu/rcudata in that
a CPU whose "g" field matches the value of "gpnum" is aware that
the corresponding RCU grace period has started.
If these two fields are equal (as they are for "rcu_bh" above),
then there is no grace period in progress, in other words, RCU
is idle. On the other hand, if the two fields differ (as they
do for "rcu_sched" above), then an RCU grace period is in progress.
If these two fields are equal, then there is no grace period
in progress, in other words, RCU is idle. On the other hand,
if the two fields differ (as they are above), then an RCU grace
period is in progress.
o "age" is the number of jiffies that the current grace period
has extended for, or zero if there is no grace period currently
in effect.
The output of "cat rcu/rcuhier" looks as follows, with very long lines:
o "max" is the age in jiffies of the longest-duration grace period
thus far.
c=6902 g=6903 s=2 jfq=3 j=72c7 nfqs=13142/nfqsng=0(13142) fqlh=6
1/1 ..>. 0:127 ^0
3/3 ..>. 0:35 ^0 0/0 ..>. 36:71 ^1 0/0 ..>. 72:107 ^2 0/0 ..>. 108:127 ^3
3/3f ..>. 0:5 ^0 2/3 ..>. 6:11 ^1 0/0 ..>. 12:17 ^2 0/0 ..>. 18:23 ^3 0/0 ..>. 24:29 ^4 0/0 ..>. 30:35 ^5 0/0 ..>. 36:41 ^0 0/0 ..>. 42:47 ^1 0/0 ..>. 48:53 ^2 0/0 ..>. 54:59 ^3 0/0 ..>. 60:65 ^4 0/0 ..>. 66:71 ^5 0/0 ..>. 72:77 ^0 0/0 ..>. 78:83 ^1 0/0 ..>. 84:89 ^2 0/0 ..>. 90:95 ^3 0/0 ..>. 96:101 ^4 0/0 ..>. 102:107 ^5 0/0 ..>. 108:113 ^0 0/0 ..>. 114:119 ^1 0/0 ..>. 120:125 ^2 0/0 ..>. 126:127 ^3
rcu_bh:
c=-226 g=-226 s=1 jfq=-5701 j=72c7 nfqs=88/nfqsng=0(88) fqlh=0
0/1 ..>. 0:127 ^0
0/3 ..>. 0:35 ^0 0/0 ..>. 36:71 ^1 0/0 ..>. 72:107 ^2 0/0 ..>. 108:127 ^3
0/3f ..>. 0:5 ^0 0/3 ..>. 6:11 ^1 0/0 ..>. 12:17 ^2 0/0 ..>. 18:23 ^3 0/0 ..>. 24:29 ^4 0/0 ..>. 30:35 ^5 0/0 ..>. 36:41 ^0 0/0 ..>. 42:47 ^1 0/0 ..>. 48:53 ^2 0/0 ..>. 54:59 ^3 0/0 ..>. 60:65 ^4 0/0 ..>. 66:71 ^5 0/0 ..>. 72:77 ^0 0/0 ..>. 78:83 ^1 0/0 ..>. 84:89 ^2 0/0 ..>. 90:95 ^3 0/0 ..>. 96:101 ^4 0/0 ..>. 102:107 ^5 0/0 ..>. 108:113 ^0 0/0 ..>. 114:119 ^1 0/0 ..>. 120:125 ^2 0/0 ..>. 126:127 ^3
The output of "cat rcu/rcu_preempt/rcuhier" looks as follows:
This is once again split into "rcu_sched" and "rcu_bh" portions,
and CONFIG_TREE_PREEMPT_RCU kernels will again have an additional
"rcu_preempt" section. The fields are as follows:
c=14407 g=14408 s=0 jfq=2 j=c863 nfqs=12040/nfqsng=0(12040) fqlh=1051 oqlen=0/0
3/3 ..>. 0:7 ^0
e/e ..>. 0:3 ^0 d/d ..>. 4:7 ^1
o "c" is exactly the same as "completed" under rcu/rcugp.
The fields are as follows:
o "g" is exactly the same as "gpnum" under rcu/rcugp.
o "c" is exactly the same as "completed" under rcu/rcu_preempt/rcugp.
o "s" is the "signaled" state that drives force_quiescent_state()'s
o "g" is exactly the same as "gpnum" under rcu/rcu_preempt/rcugp.
o "s" is the current state of the force_quiescent_state()
state machine.
o "jfq" is the number of jiffies remaining for this grace period
before force_quiescent_state() is invoked to help push things
along. Note that CPUs in dyntick-idle mode throughout the grace
period will not report on their own, but rather must be check by
some other CPU via force_quiescent_state().
along. Note that CPUs in idle mode throughout the grace period
will not report on their own, but rather must be check by some
other CPU via force_quiescent_state().
o "j" is the low-order four hex digits of the jiffies counter.
Yes, Paul did run into a number of problems that turned out to
@ -268,7 +332,8 @@ o "nfqs" is the number of calls to force_quiescent_state() since
o "nfqsng" is the number of useless calls to force_quiescent_state(),
where there wasn't actually a grace period active. This can
happen due to races. The number in parentheses is the difference
no longer happen due to grace-period processing being pushed
into a kthread. The number in parentheses is the difference
between "nfqs" and "nfqsng", or the number of times that
force_quiescent_state() actually did some real work.
@ -276,28 +341,27 @@ o "fqlh" is the number of calls to force_quiescent_state() that
exited immediately (without even being counted in nfqs above)
due to contention on ->fqslock.
o Each element of the form "1/1 0:127 ^0" represents one struct
rcu_node. Each line represents one level of the hierarchy, from
root to leaves. It is best to think of the rcu_data structures
as forming yet another level after the leaves. Note that there
might be either one, two, or three levels of rcu_node structures,
depending on the relationship between CONFIG_RCU_FANOUT and
CONFIG_NR_CPUS.
o Each element of the form "3/3 ..>. 0:7 ^0" represents one rcu_node
structure. Each line represents one level of the hierarchy,
from root to leaves. It is best to think of the rcu_data
structures as forming yet another level after the leaves.
Note that there might be either one, two, three, or even four
levels of rcu_node structures, depending on the relationship
between CONFIG_RCU_FANOUT, CONFIG_RCU_FANOUT_LEAF (possibly
adjusted using the rcu_fanout_leaf kernel boot parameter), and
CONFIG_NR_CPUS (possibly adjusted using the nr_cpu_ids count of
possible CPUs for the booting hardware).
o The numbers separated by the "/" are the qsmask followed
by the qsmaskinit. The qsmask will have one bit
set for each entity in the next lower level that
has not yet checked in for the current grace period.
set for each entity in the next lower level that has
not yet checked in for the current grace period ("e"
indicating CPUs 5, 6, and 7 in the example above).
The qsmaskinit will have one bit for each entity that is
currently expected to check in during each grace period.
The value of qsmaskinit is assigned to that of qsmask
at the beginning of each grace period.
For example, for "rcu_sched", the qsmask of the first
entry of the lowest level is 0x14, meaning that we
are still waiting for CPUs 2 and 4 to check in for the
current grace period.
o The characters separated by the ">" indicate the state
of the blocked-tasks lists. A "G" preceding the ">"
indicates that at least one task blocked in an RCU
@ -312,48 +376,39 @@ o Each element of the form "1/1 0:127 ^0" represents one struct
A "." character appears if the corresponding condition
does not hold, so that "..>." indicates that no tasks
are blocked. In contrast, "GE>T" indicates maximal
inconvenience from blocked tasks.
inconvenience from blocked tasks. CONFIG_TREE_RCU
builds of the kernel will always show "..>.".
o The numbers separated by the ":" are the range of CPUs
served by this struct rcu_node. This can be helpful
in working out how the hierarchy is wired together.
For example, the first entry at the lowest level shows
"0:5", indicating that it covers CPUs 0 through 5.
For example, the example rcu_node structure shown above
has "0:7", indicating that it covers CPUs 0 through 7.
o The number after the "^" indicates the bit in the
next higher level rcu_node structure that this
rcu_node structure corresponds to.
For example, the first entry at the lowest level shows
"^0", indicating that it corresponds to bit zero in
the first entry at the middle level.
next higher level rcu_node structure that this rcu_node
structure corresponds to. For example, the "d/d ..>. 4:7
^1" has a "1" in this position, indicating that it
corresponds to the "1" bit in the "3" shown in the
"3/3 ..>. 0:7 ^0" entry on the next level up.
The output of "cat rcu/rcu_pending" looks as follows:
The output of "cat rcu/rcu_sched/rcu_pending" looks as follows:
rcu_sched:
0 np=255892 qsp=53936 rpq=85 cbr=0 cng=14417 gpc=10033 gps=24320 nn=146741
1 np=261224 qsp=54638 rpq=33 cbr=0 cng=25723 gpc=16310 gps=2849 nn=155792
2 np=237496 qsp=49664 rpq=23 cbr=0 cng=2762 gpc=45478 gps=1762 nn=136629
3 np=236249 qsp=48766 rpq=98 cbr=0 cng=286 gpc=48049 gps=1218 nn=137723
4 np=221310 qsp=46850 rpq=7 cbr=0 cng=26 gpc=43161 gps=4634 nn=123110
5 np=237332 qsp=48449 rpq=9 cbr=0 cng=54 gpc=47920 gps=3252 nn=137456
6 np=219995 qsp=46718 rpq=12 cbr=0 cng=50 gpc=42098 gps=6093 nn=120834
7 np=249893 qsp=49390 rpq=42 cbr=0 cng=72 gpc=38400 gps=17102 nn=144888
rcu_bh:
0 np=146741 qsp=1419 rpq=6 cbr=0 cng=6 gpc=0 gps=0 nn=145314
1 np=155792 qsp=12597 rpq=3 cbr=0 cng=0 gpc=4 gps=8 nn=143180
2 np=136629 qsp=18680 rpq=1 cbr=0 cng=0 gpc=7 gps=6 nn=117936
3 np=137723 qsp=2843 rpq=0 cbr=0 cng=0 gpc=10 gps=7 nn=134863
4 np=123110 qsp=12433 rpq=0 cbr=0 cng=0 gpc=4 gps=2 nn=110671
5 np=137456 qsp=4210 rpq=1 cbr=0 cng=0 gpc=6 gps=5 nn=133235
6 np=120834 qsp=9902 rpq=2 cbr=0 cng=0 gpc=6 gps=3 nn=110921
7 np=144888 qsp=26336 rpq=0 cbr=0 cng=0 gpc=8 gps=2 nn=118542
0!np=26111 qsp=29 rpq=5386 cbr=1 cng=570 gpc=3674 gps=577 nn=15903
1!np=28913 qsp=35 rpq=6097 cbr=1 cng=448 gpc=3700 gps=554 nn=18113
2!np=32740 qsp=37 rpq=6202 cbr=0 cng=476 gpc=4627 gps=546 nn=20889
3 np=23679 qsp=22 rpq=5044 cbr=1 cng=415 gpc=3403 gps=347 nn=14469
4!np=30714 qsp=4 rpq=5574 cbr=0 cng=528 gpc=3931 gps=639 nn=20042
5 np=28910 qsp=2 rpq=5246 cbr=0 cng=428 gpc=4105 gps=709 nn=18422
6!np=38648 qsp=5 rpq=7076 cbr=0 cng=840 gpc=4072 gps=961 nn=25699
7 np=37275 qsp=2 rpq=6873 cbr=0 cng=868 gpc=3416 gps=971 nn=25147
As always, this is once again split into "rcu_sched" and "rcu_bh"
portions, with CONFIG_TREE_PREEMPT_RCU kernels having an additional
"rcu_preempt" section. The fields are as follows:
The fields are as follows:
o The leading number is the CPU number, with "!" indicating
an offline CPU.
o "np" is the number of times that __rcu_pending() has been invoked
for the corresponding flavor of RCU.
@ -377,38 +432,23 @@ o "gpc" is the number of times that an old grace period had
o "gps" is the number of times that a new grace period had started,
but this CPU was not yet aware of it.
o "nn" is the number of times that this CPU needed nothing. Alert
readers will note that the rcu "nn" number for a given CPU very
closely matches the rcu_bh "np" number for that same CPU. This
is due to short-circuit evaluation in rcu_pending().
The output of "cat rcu/rcutorture" looks as follows:
rcutorture test sequence: 0 (test in progress)
rcutorture update version number: 615
The first line shows the number of rcutorture tests that have completed
since boot. If a test is currently running, the "(test in progress)"
string will appear as shown above. The second line shows the number of
update cycles that the current test has started, or zero if there is
no test in progress.
o "nn" is the number of times that this CPU needed nothing.
The output of "cat rcu/rcuboost" looks as follows:
0:5 tasks=.... kt=W ntb=0 neb=0 nnb=0 j=2f95 bt=300f
balk: nt=0 egt=989 bt=0 nb=0 ny=0 nos=16
6:7 tasks=.... kt=W ntb=0 neb=0 nnb=0 j=2f95 bt=300f
balk: nt=0 egt=225 bt=0 nb=0 ny=0 nos=6
0:3 tasks=.... kt=W ntb=0 neb=0 nnb=0 j=c864 bt=c894
balk: nt=0 egt=4695 bt=0 nb=0 ny=56 nos=0
4:7 tasks=.... kt=W ntb=0 neb=0 nnb=0 j=c864 bt=c894
balk: nt=0 egt=6541 bt=0 nb=0 ny=126 nos=0
This information is output only for rcu_preempt. Each two-line entry
corresponds to a leaf rcu_node strcuture. The fields are as follows:
o "n:m" is the CPU-number range for the corresponding two-line
entry. In the sample output above, the first entry covers
CPUs zero through five and the second entry covers CPUs 6
and 7.
CPUs zero through three and the second entry covers CPUs four
through seven.
o "tasks=TNEB" gives the state of the various segments of the
rnp->blocked_tasks list:

17
Documentation/RCU/whatisRCU.txt
View File

@ -499,6 +499,8 @@ The foo_reclaim() function might appear as follows:
{
struct foo *fp = container_of(rp, struct foo, rcu);
foo_cleanup(fp->a);
kfree(fp);
}
@ -521,6 +523,12 @@ o Use call_rcu() -after- removing a data element from an
read-side critical sections that might be referencing that
data item.
If the callback for call_rcu() is not doing anything more than calling
kfree() on the structure, you can use kfree_rcu() instead of call_rcu()
to avoid having to write your own callback:
kfree_rcu(old_fp, rcu);
Again, see checklist.txt for additional rules governing the use of RCU.
@ -773,8 +781,8 @@ a single atomic update, converting to RCU will require special care.
Also, the presence of synchronize_rcu() means that the RCU version of
delete() can now block. If this is a problem, there is a callback-based
mechanism that never blocks, namely call_rcu(), that can be used in
place of synchronize_rcu().
mechanism that never blocks, namely call_rcu() or kfree_rcu(), that can
be used in place of synchronize_rcu().
7. FULL LIST OF RCU APIs
@ -789,9 +797,7 @@ RCU list traversal:
list_for_each_entry_rcu
hlist_for_each_entry_rcu
hlist_nulls_for_each_entry_rcu
list_for_each_continue_rcu (to be deprecated in favor of new
list_for_each_entry_continue_rcu)
list_for_each_entry_continue_rcu
RCU pointer/list update:
@ -813,6 +819,7 @@ RCU: Critical sections Grace period Barrier
rcu_read_unlock synchronize_rcu
rcu_dereference synchronize_rcu_expedited
call_rcu
kfree_rcu
bh: Critical sections Grace period Barrier

227
Documentation/acpi/enumeration.txt Normal file
View File

@ -0,0 +1,227 @@
ACPI based device enumeration
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ACPI 5 introduced a set of new resources (UartTSerialBus, I2cSerialBus,
SpiSerialBus, GpioIo and GpioInt) which can be used in enumerating slave
devices behind serial bus controllers.
In addition we are starting to see peripherals integrated in the
SoC/Chipset to appear only in ACPI namespace. These are typically devices
that are accessed through memory-mapped registers.
In order to support this and re-use the existing drivers as much as
possible we decided to do following:
o Devices that have no bus connector resource are represented as
platform devices.
o Devices behind real busses where there is a connector resource
are represented as struct spi_device or struct i2c_device
(standard UARTs are not busses so there is no struct uart_device).
As both ACPI and Device Tree represent a tree of devices (and their
resources) this implementation follows the Device Tree way as much as
possible.
The ACPI implementation enumerates devices behind busses (platform, SPI and
I2C), creates the physical devices and binds them to their ACPI handle in
the ACPI namespace.
This means that when ACPI_HANDLE(dev) returns non-NULL the device was
enumerated from ACPI namespace. This handle can be used to extract other
device-specific configuration. There is an example of this below.
Platform bus support
~~~~~~~~~~~~~~~~~~~~
Since we are using platform devices to represent devices that are not
connected to any physical bus we only need to implement a platform driver
for the device and add supported ACPI IDs. If this same IP-block is used on
some other non-ACPI platform, the driver might work out of the box or needs
some minor changes.
Adding ACPI support for an existing driver should be pretty
straightforward. Here is the simplest example:
#ifdef CONFIG_ACPI
static struct acpi_device_id mydrv_acpi_match[] = {
/* ACPI IDs here */
{ }
};
MODULE_DEVICE_TABLE(acpi, mydrv_acpi_match);
#endif
static struct platform_driver my_driver = {
...
.driver = {
.acpi_match_table = ACPI_PTR(mydrv_acpi_match),
},
};
If the driver needs to perform more complex initialization like getting and
configuring GPIOs it can get its ACPI handle and extract this information
from ACPI tables.
Currently the kernel is not able to automatically determine from which ACPI
device it should make the corresponding platform device so we need to add
the ACPI device explicitly to acpi_platform_device_ids list defined in
drivers/acpi/scan.c. This limitation is only for the platform devices, SPI
and I2C devices are created automatically as described below.
SPI serial bus support
~~~~~~~~~~~~~~~~~~~~~~
Slave devices behind SPI bus have SpiSerialBus resource attached to them.
This is extracted automatically by the SPI core and the slave devices are
enumerated once spi_register_master() is called by the bus driver.
Here is what the ACPI namespace for a SPI slave might look like:
Device (EEP0)
{
Name (_ADR, 1)
Name (_CID, Package() {
"ATML0025",
"AT25",
})
...
Method (_CRS, 0, NotSerialized)
{
SPISerialBus(1, PolarityLow, FourWireMode, 8,
ControllerInitiated, 1000000, ClockPolarityLow,
ClockPhaseFirst, "\\_SB.PCI0.SPI1",)
}
...
The SPI device drivers only need to add ACPI IDs in a similar way than with
the platform device drivers. Below is an example where we add ACPI support
to at25 SPI eeprom driver (this is meant for the above ACPI snippet):
#ifdef CONFIG_ACPI
static struct acpi_device_id at25_acpi_match[] = {
{ "AT25", 0 },
{ },
};
MODULE_DEVICE_TABLE(acpi, at25_acpi_match);
#endif
static struct spi_driver at25_driver = {
.driver = {
...
.acpi_match_table = ACPI_PTR(at25_acpi_match),
},
};
Note that this driver actually needs more information like page size of the
eeprom etc. but at the time writing this there is no standard way of
passing those. One idea is to return this in _DSM method like:
Device (EEP0)
{
...
Method (_DSM, 4, NotSerialized)
{
Store (Package (6)
{
"byte-len", 1024,
"addr-mode", 2,
"page-size, 32
}, Local0)
// Check UUIDs etc.
Return (Local0)
}
Then the at25 SPI driver can get this configation by calling _DSM on its
ACPI handle like:
struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
struct acpi_object_list input;
acpi_status status;
/* Fill in the input buffer */
status = acpi_evaluate_object(ACPI_HANDLE(&spi->dev), "_DSM",
&input, &output);
if (ACPI_FAILURE(status))
/* Handle the error */
/* Extract the data here */
kfree(output.pointer);
I2C serial bus support
~~~~~~~~~~~~~~~~~~~~~~
The slaves behind I2C bus controller only need to add the ACPI IDs like
with the platform and SPI drivers. However the I2C bus controller driver
needs to call acpi_i2c_register_devices() after it has added the adapter.
An I2C bus (controller) driver does:
...
ret = i2c_add_numbered_adapter(adapter);
if (ret)
/* handle error */
of_i2c_register_devices(adapter);
/* Enumerate the slave devices behind this bus via ACPI */
acpi_i2c_register_devices(adapter);
Below is an example of how to add ACPI support to the existing mpu3050
input driver:
#ifdef CONFIG_ACPI
static struct acpi_device_id mpu3050_acpi_match[] = {
{ "MPU3050", 0 },
{ },
};
MODULE_DEVICE_TABLE(acpi, mpu3050_acpi_match);
#endif
static struct i2c_driver mpu3050_i2c_driver = {
.driver = {
.name = "mpu3050",
.owner = THIS_MODULE,
.pm = &mpu3050_pm,
.of_match_table = mpu3050_of_match,
.acpi_match_table ACPI_PTR(mpu3050_acpi_match),
},
.probe = mpu3050_probe,
.remove = __devexit_p(mpu3050_remove),
.id_table = mpu3050_ids,
};
GPIO support
~~~~~~~~~~~~
ACPI 5 introduced two new resources to describe GPIO connections: GpioIo
and GpioInt. These resources are used be used to pass GPIO numbers used by
the device to the driver. For example:
Method (_CRS, 0, NotSerialized)
{
Name (SBUF, ResourceTemplate()
{
GpioIo (Exclusive, PullDefault, 0x0000, 0x0000,
IoRestrictionOutputOnly, "\\_SB.PCI0.GPI0",
0x00, ResourceConsumer,,)
{
// Pin List
0x0055
}
...
Return (SBUF)
}
}
These GPIO numbers are controller relative and path "\\_SB.PCI0.GPI0"
specifies the path to the controller. In order to use these GPIOs in Linux
we need to translate them to the Linux GPIO numbers.
The driver can do this by including <linux/acpi_gpio.h> and then calling
acpi_get_gpio(path, gpio). This will return the Linux GPIO number or
negative errno if there was no translation found.
Other GpioIo parameters must be converted first by the driver to be
suitable to the gpiolib before passing them.
In case of GpioInt resource an additional call to gpio_to_irq() must be
done before calling request_irq().

10
Documentation/cgroups/memory.txt
View File

@ -144,9 +144,9 @@ Figure 1 shows the important aspects of the controller
3. Each page has a pointer to the page_cgroup, which in turn knows the
cgroup it belongs to
The accounting is done as follows: mem_cgroup_charge() is invoked to set up
the necessary data structures and check if the cgroup that is being charged
is over its limit. If it is, then reclaim is invoked on the cgroup.
The accounting is done as follows: mem_cgroup_charge_common() is invoked to
set up the necessary data structures and check if the cgroup that is being
charged is over its limit. If it is, then reclaim is invoked on the cgroup.
More details can be found in the reclaim section of this document.
If everything goes well, a page meta-data-structure called page_cgroup is
updated. page_cgroup has its own LRU on cgroup.
@ -466,6 +466,10 @@ Note:
5.3 swappiness
Similar to /proc/sys/vm/swappiness, but affecting a hierarchy of groups only.
Please note that unlike the global swappiness, memcg knob set to 0
really prevents from any swapping even if there is a swap storage
available. This might lead to memcg OOM killer if there are no file
pages to reclaim.
Following cgroups' swappiness can't be changed.
- root cgroup (uses /proc/sys/vm/swappiness).

24
Documentation/cpu-hotplug.txt
View File

@ -207,6 +207,30 @@ by making it not-removable.
In such cases you will also notice that the online file is missing under cpu0.
Q: Is CPU0 removable on X86?
A: Yes. If kernel is compiled with CONFIG_BOOTPARAM_HOTPLUG_CPU0=y, CPU0 is
removable by default. Otherwise, CPU0 is also removable by kernel option
cpu0_hotplug.
But some features depend on CPU0. Two known dependencies are:
1. Resume from hibernate/suspend depends on CPU0. Hibernate/suspend will fail if
CPU0 is offline and you need to online CPU0 before hibernate/suspend can
continue.
2. PIC interrupts also depend on CPU0. CPU0 can't be removed if a PIC interrupt
is detected.
It's said poweroff/reboot may depend on CPU0 on some machines although I haven't
seen any poweroff/reboot failure so far after CPU0 is offline on a few tested
machines.
Please let me know if you know or see any other dependencies of CPU0.
If the dependencies are under your control, you can turn on CPU0 hotplug feature
either by CONFIG_BOOTPARAM_HOTPLUG_CPU0 or by kernel parameter cpu0_hotplug.
--Fenghua Yu <fenghua.yu@intel.com>
Q: How do i find out if a particular CPU is not removable?
A: Depending on the implementation, some architectures may show this by the
absence of the "online" file. This is done if it can be determined ahead of

3
Documentation/devices.txt
View File

@ -2561,9 +2561,6 @@ Your cooperation is appreciated.
192 = /dev/usb/yurex1 First USB Yurex device
...
209 = /dev/usb/yurex16 16th USB Yurex device
240 = /dev/usb/dabusb0 First daubusb device
...
243 = /dev/usb/dabusb3 Fourth dabusb device
180 block USB block devices
0 = /dev/uba First USB block device

6
Documentation/devicetree/bindings/arm/atmel-at91.txt
View File

@ -7,6 +7,12 @@ PIT Timer required properties:
- interrupts: Should contain interrupt for the PIT which is the IRQ line
shared across all System Controller members.
System Timer (ST) required properties:
- compatible: Should be "atmel,at91rm9200-st"
- reg: Should contain registers location and length
- interrupts: Should contain interrupt for the ST which is the IRQ line
shared across all System Controller members.
TC/TCLIB Timer required properties:
- compatible: Should be "atmel,<chip>-tcb".
<chip> can be "at91rm9200" or "at91sam9x5"

37
Documentation/devicetree/bindings/arm/davinci/nand.txt
View File

@ -23,29 +23,16 @@ Recommended properties :
- ti,davinci-nand-buswidth: buswidth 8 or 16
- ti,davinci-nand-use-bbt: use flash based bad block table support.
Example (enbw_cmc board):
aemif@60000000 {
compatible = "ti,davinci-aemif";
#address-cells = <2>;
#size-cells = <1>;
reg = <0x68000000 0x80000>;
ranges = <2 0 0x60000000 0x02000000
3 0 0x62000000 0x02000000
4 0 0x64000000 0x02000000
5 0 0x66000000 0x02000000
6 0 0x68000000 0x02000000>;
nand@3,0 {
compatible = "ti,davinci-nand";
reg = <3 0x0 0x807ff
6 0x0 0x8000>;
#address-cells = <1>;
#size-cells = <1>;
ti,davinci-chipselect = <1>;
ti,davinci-mask-ale = <0>;
ti,davinci-mask-cle = <0>;
ti,davinci-mask-chipsel = <0>;
ti,davinci-ecc-mode = "hw";
ti,davinci-ecc-bits = <4>;
ti,davinci-nand-use-bbt;
};
Example(da850 EVM ):
nand_cs3@62000000 {
compatible = "ti,davinci-nand";
reg = <0x62000000 0x807ff
0x68000000 0x8000>;
ti,davinci-chipselect = <1>;
ti,davinci-mask-ale = <0>;
ti,davinci-mask-cle = <0>;
ti,davinci-mask-chipsel = <0>;
ti,davinci-ecc-mode = "hw";
ti,davinci-ecc-bits = <4>;
ti,davinci-nand-use-bbt;
};

2
Documentation/devicetree/bindings/arm/l2cc.txt
View File

@ -37,7 +37,7 @@ L2: cache-controller {
reg = <0xfff12000 0x1000>;
arm,data-latency = <1 1 1>;
arm,tag-latency = <2 2 2>;
arm,filter-latency = <0x80000000 0x8000000>;
arm,filter-ranges = <0x80000000 0x8000000>;
cache-unified;
cache-level = <2>;
interrupts = <45>;

2
Documentation/devicetree/bindings/clock/imx23-clock.txt
View File

@ -52,7 +52,7 @@ clocks and IDs.
lcdif 38
etm 39
usb 40
usb_pwr 41
usb_phy 41
Examples:

4
Documentation/devicetree/bindings/clock/imx28-clock.txt
View File

@ -73,8 +73,8 @@ clocks and IDs.
can1 59
usb0 60
usb1 61
usb0_pwr 62
usb1_pwr 63
usb0_phy 62
usb1_phy 63
enet_out 64
Examples:

42
Documentation/devicetree/bindings/cpufreq/cpufreq-spear.txt Normal file
View File

@ -0,0 +1,42 @@
SPEAr cpufreq driver
-------------------
SPEAr SoC cpufreq driver for CPU frequency scaling.
It supports both uniprocessor (UP) and symmetric multiprocessor (SMP) systems
which share clock across all CPUs.
Required properties:
- cpufreq_tbl: Table of frequencies CPU could be transitioned into, in the
increasing order.
Optional properties:
- clock-latency: Specify the possible maximum transition latency for clock, in
unit of nanoseconds.
Both required and optional properties listed above must be defined under node
/cpus/cpu@0.
Examples:
--------
cpus {
<...>
cpu@0 {
compatible = "arm,cortex-a9";
reg = <0>;
<...>
cpufreq_tbl = < 166000
200000
250000
300000
400000
500000
600000 >;
};
<...>
};

18
Documentation/devicetree/bindings/gpio/gpio-stmpe.txt Normal file
View File

@ -0,0 +1,18 @@
STMPE gpio
----------
Required properties:
- compatible: "st,stmpe-gpio"
Optional properties:
- st,norequest-mask: bitmask specifying which GPIOs should _not_ be requestable
due to different usage (e.g. touch, keypad)
Node name must be stmpe_gpio and should be child node of stmpe node to which it
belongs.
Example:
stmpe_gpio {
compatible = "st,stmpe-gpio";
st,norequest-mask = <0x20>; //gpio 5 can't be used
};

36
Documentation/devicetree/bindings/gpio/gpio.txt
View File

@ -75,4 +75,40 @@ Example of two SOC GPIO banks defined as gpio-controller nodes:
gpio-controller;
};
2.1) gpio-controller and pinctrl subsystem
------------------------------------------
gpio-controller on a SOC might be tightly coupled with the pinctrl
subsystem, in the sense that the pins can be used by other functions
together with optional gpio feature.
While the pin allocation is totally managed by the pin ctrl subsystem,
gpio (under gpiolib) is still maintained by gpio drivers. It may happen
that different pin ranges in a SoC is managed by different gpio drivers.
This makes it logical to let gpio drivers announce their pin ranges to
the pin ctrl subsystem and call 'pinctrl_request_gpio' in order to
request the corresponding pin before any gpio usage.
For this, the gpio controller can use a pinctrl phandle and pins to
announce the pinrange to the pin ctrl subsystem. For example,
qe_pio_e: gpio-controller@1460 {
#gpio-cells = <2>;
compatible = "fsl,qe-pario-bank-e", "fsl,qe-pario-bank";
reg = <0x1460 0x18>;
gpio-controller;
gpio-ranges = <&pinctrl1 20 10>, <&pinctrl2 50 20>;
}
where,
&pinctrl1 and &pinctrl2 is the phandle to the pinctrl DT node.
Next values specify the base pin and number of pins for the range
handled by 'qe_pio_e' gpio. In the given example from base pin 20 to
pin 29 under pinctrl1 and pin 50 to pin 69 under pinctrl2 is handled
by this gpio controller.
The pinctrl node must have "#gpio-range-cells" property to show number of
arguments to pass with phandle from gpio controllers node.

5
Documentation/devicetree/bindings/gpio/gpio_atmel.txt
View File

@ -9,6 +9,10 @@ Required properties:
unused).
- gpio-controller: Marks the device node as a GPIO controller.
optional properties:
- #gpio-lines: Number of gpio if absent 32.
Example:
pioA: gpio@fffff200 {
compatible = "atmel,at91rm9200-gpio";
@ -16,5 +20,6 @@ Example:
interrupts = <2 4>;
#gpio-cells = <2>;
gpio-controller;
#gpio-lines = <19>;
};

50
Documentation/devicetree/bindings/gpio/spear_spics.txt Normal file
View File

@ -0,0 +1,50 @@
=== ST Microelectronics SPEAr SPI CS Driver ===
SPEAr platform provides a provision to control chipselects of ARM PL022 Prime
Cell spi controller through its system registers, which otherwise remains under
PL022 control. If chipselect remain under PL022 control then they would be
released as soon as transfer is over and TxFIFO becomes empty. This is not
desired by some of the device protocols above spi which expect (multiple)
transfers without releasing their chipselects.
Chipselects can be controlled by software by turning them as GPIOs. SPEAr
provides another interface through system registers through which software can
directly control each PL022 chipselect. Hence, it is natural for SPEAr to export
the control of this interface as gpio.
Required properties:
* compatible: should be defined as "st,spear-spics-gpio"
* reg: mentioning address range of spics controller
* st-spics,peripcfg-reg: peripheral configuration register offset
* st-spics,sw-enable-bit: bit offset to enable sw control
* st-spics,cs-value-bit: bit offset to drive chipselect low or high
* st-spics,cs-enable-mask: chip select number bit mask
* st-spics,cs-enable-shift: chip select number program offset
* gpio-controller: Marks the device node as gpio controller
* #gpio-cells: should be 1 and will mention chip select number
All the above bit offsets are within peripcfg register.
Example:
-------
spics: spics@e0700000{
compatible = "st,spear-spics-gpio";
reg = <0xe0700000 0x1000>;
st-spics,peripcfg-reg = <0x3b0>;
st-spics,sw-enable-bit = <12>;
st-spics,cs-value-bit = <11>;
st-spics,cs-enable-mask = <3>;
st-spics,cs-enable-shift = <8>;
gpio-controller;
#gpio-cells = <2>;
};
spi0: spi@e0100000 {
status = "okay";
num-cs = <3>;
cs-gpios = <&gpio1 7 0>, <&spics 0>,
<&spics 1>;
...
}

0
Documentation/devicetree/bindings/i2c/atmel-i2c.txt → Documentation/devicetree/bindings/i2c/i2c-at91.txt
View File

0
Documentation/devicetree/bindings/i2c/davinci.txt → Documentation/devicetree/bindings/i2c/i2c-davinci.txt
View File

0
Documentation/devicetree/bindings/i2c/gpio-i2c.txt → Documentation/devicetree/bindings/i2c/i2c-gpio.txt
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0
Documentation/devicetree/bindings/i2c/fsl-imx-i2c.txt → Documentation/devicetree/bindings/i2c/i2c-imx.txt
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0
Documentation/devicetree/bindings/i2c/fsl-i2c.txt → Documentation/devicetree/bindings/i2c/i2c-mpc.txt
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0
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18
Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt Normal file
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@ -0,0 +1,18 @@
* Marvell MV64XXX I2C controller
Required properties :
- reg : Offset and length of the register set for the device
- compatible : Should be "marvell,mv64xxx-i2c"
- interrupts : The interrupt number
- clock-frequency : Desired I2C bus clock frequency in Hz.
Examples:
i2c@11000 {
compatible = "marvell,mv64xxx-i2c";
reg = <0x11000 0x20>;
interrupts = <29>;
clock-frequency = <100000>;
};

0
Documentation/devicetree/bindings/i2c/nomadik.txt → Documentation/devicetree/bindings/i2c/i2c-nomadik.txt
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0
Documentation/devicetree/bindings/i2c/cavium-i2c.txt → Documentation/devicetree/bindings/i2c/i2c-octeon.txt
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0
Documentation/devicetree/bindings/i2c/omap-i2c.txt → Documentation/devicetree/bindings/i2c/i2c-omap.txt
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0
Documentation/devicetree/bindings/i2c/pnx.txt → Documentation/devicetree/bindings/i2c/i2c-pnx.txt
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0
Documentation/devicetree/bindings/i2c/ce4100-i2c.txt → Documentation/devicetree/bindings/i2c/i2c-pxa-pci-ce4100.txt
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18
Documentation/devicetree/bindings/i2c/mrvl-i2c.txt → Documentation/devicetree/bindings/i2c/i2c-pxa.txt
View File

@ -31,21 +31,3 @@ Examples:
reg = <0xd4025000 0x1000>;
interrupts = <58>;
};
* Marvell MV64XXX I2C controller
Required properties :
- reg : Offset and length of the register set for the device
- compatible : Should be "marvell,mv64xxx-i2c"
- interrupts : The interrupt number
- clock-frequency : Desired I2C bus clock frequency in Hz.
Examples:
i2c@11000 {
compatible = "marvell,mv64xxx-i2c";
reg = <0x11000 0x20>;
interrupts = <29>;
clock-frequency = <100000>;
};

0
Documentation/devicetree/bindings/i2c/samsung-i2c.txt → Documentation/devicetree/bindings/i2c/i2c-s3c2410.txt
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0
Documentation/devicetree/bindings/i2c/sirf-i2c.txt → Documentation/devicetree/bindings/i2c/i2c-sirf.txt
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0
Documentation/devicetree/bindings/i2c/arm-versatile.txt → Documentation/devicetree/bindings/i2c/i2c-versatile.txt
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0
Documentation/devicetree/bindings/i2c/xiic.txt → Documentation/devicetree/bindings/i2c/i2c-xiic.txt
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23
Documentation/devicetree/bindings/leds/common.txt Normal file
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@ -0,0 +1,23 @@
Common leds properties.
Optional properties for child nodes:
- label : The label for this LED. If omitted, the label is
taken from the node name (excluding the unit address).
- linux,default-trigger : This parameter, if present, is a
string defining the trigger assigned to the LED. Current triggers are:
"backlight" - LED will act as a back-light, controlled by the framebuffer
system
"default-on" - LED will turn on (but for leds-gpio see "default-state"
property in Documentation/devicetree/bindings/gpio/led.txt)
"heartbeat" - LED "double" flashes at a load average based rate
"ide-disk" - LED indicates disk activity
"timer" - LED flashes at a fixed, configurable rate
Examples:
system-status {
label = "Status";
linux,default-trigger = "heartbeat";
...
};

14
Documentation/devicetree/bindings/gpio/led.txt → Documentation/devicetree/bindings/leds/leds-gpio.txt
View File

@ -10,16 +10,10 @@ LED sub-node properties:
- gpios : Should specify the LED's GPIO, see "gpios property" in
Documentation/devicetree/bindings/gpio/gpio.txt. Active low LEDs should be
indicated using flags in the GPIO specifier.
- label : (optional) The label for this LED. If omitted, the label is
taken from the node name (excluding the unit address).
- linux,default-trigger : (optional) This parameter, if present, is a
string defining the trigger assigned to the LED. Current triggers are:
"backlight" - LED will act as a back-light, controlled by the framebuffer
system
"default-on" - LED will turn on, but see "default-state" below
"heartbeat" - LED "double" flashes at a load average based rate
"ide-disk" - LED indicates disk activity
"timer" - LED flashes at a fixed, configurable rate
- label : (optional)
see Documentation/devicetree/bindings/leds/common.txt
- linux,default-trigger : (optional)
see Documentation/devicetree/bindings/leds/common.txt
- default-state: (optional) The initial state of the LED. Valid
values are "on", "off", and "keep". If the LED is already on or off
and the default-state property is set the to same value, then no

8
Documentation/devicetree/bindings/mmc/mmc.txt
View File

@ -21,6 +21,12 @@ Optional properties:
- cd-inverted: when present, polarity on the cd gpio line is inverted
- wp-inverted: when present, polarity on the wp gpio line is inverted
- max-frequency: maximum operating clock frequency
- no-1-8-v: when present, denotes that 1.8v card voltage is not supported on
this system, even if the controller claims it is.
Optional SDIO properties:
- keep-power-in-suspend: Preserves card power during a suspend/resume cycle
- enable-sdio-wakeup: Enables wake up of host system on SDIO IRQ assertion
Example:
@ -33,4 +39,6 @@ sdhci@ab000000 {
cd-inverted;
wp-gpios = <&gpio 70 0>;
max-frequency = <50000000>;
keep-power-in-suspend;
enable-sdio-wakeup;
}

20
Documentation/devicetree/bindings/mmc/samsung-sdhci.txt
View File

@ -12,10 +12,6 @@ is used. The Samsung's SDHCI controller bindings extends this as listed below.
[A] The property "samsung,cd-pinmux-gpio" can be used as stated in the
"Optional Board Specific Properties" section below.
[B] If core card-detect bindings and "samsung,cd-pinmux-gpio" property
is not specified, it is assumed that there is no card detection
mechanism used.
Required SoC Specific Properties:
- compatible: should be one of the following
- "samsung,s3c6410-sdhci": For controllers compatible with s3c6410 sdhci
@ -24,14 +20,18 @@ Required SoC Specific Properties:
controller.
Required Board Specific Properties:
- gpios: Should specify the gpios used for clock, command and data lines. The
gpio specifier format depends on the gpio controller.
- Samsung GPIO variant (will be completely replaced by pinctrl):
- gpios: Should specify the gpios used for clock, command and data lines. The
gpio specifier format depends on the gpio controller.
- Pinctrl variant (preferred if available):
- pinctrl-0: Should specify pin control groups used for this controller.
- pinctrl-names: Should contain only one value - "default".
Optional Board Specific Properties:
- samsung,cd-pinmux-gpio: Specifies the card detect line that is routed
through a pinmux to the card-detect pin of the card slot. This property
should be used only if none of the mmc core card-detect properties are
used.
used. Only for Samsung GPIO variant.
Example:
sdhci@12530000 {
@ -40,12 +40,18 @@ Example:
interrupts = <0 75 0>;
bus-width = <4>;
cd-gpios = <&gpk2 2 2 3 3>;
/* Samsung GPIO variant */
gpios = <&gpk2 0 2 0 3>, /* clock line */
<&gpk2 1 2 0 3>, /* command line */
<&gpk2 3 2 3 3>, /* data line 0 */
<&gpk2 4 2 3 3>, /* data line 1 */
<&gpk2 5 2 3 3>, /* data line 2 */
<&gpk2 6 2 3 3>; /* data line 3 */
/* Pinctrl variant */
pinctrl-0 = <&sd0_clk &sd0_cmd &sd0_bus4>;
pinctrl-names = "default";
};
Note: This example shows both SoC specific and board specific properties

0
Documentation/devicetree/bindings/mmc/synposis-dw-mshc.txt → Documentation/devicetree/bindings/mmc/synopsis-dw-mshc.txt
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1
Documentation/devicetree/bindings/mmc/ti-omap-hsmmc.txt
View File

@ -19,6 +19,7 @@ ti,dual-volt: boolean, supports dual voltage cards
"supply-name" examples are "vmmc", "vmmc_aux" etc
ti,non-removable: non-removable slot (like eMMC)
ti,needs-special-reset: Requires a special softreset sequence
ti,needs-special-hs-handling: HSMMC IP needs special setting for handling High Speed
Example:
mmc1: mmc@0x4809c000 {

23
Documentation/devicetree/bindings/mmc/vt8500-sdmmc.txt Normal file
View File

@ -0,0 +1,23 @@
* Wondermedia WM8505/WM8650 SD/MMC Host Controller
This file documents differences between the core properties described
by mmc.txt and the properties used by the wmt-sdmmc driver.
Required properties:
- compatible: Should be "wm,wm8505-sdhc".
- interrupts: Two interrupts are required - regular irq and dma irq.
Optional properties:
- sdon-inverted: SD_ON bit is inverted on the controller
Examples:
sdhc@d800a000 {
compatible = "wm,wm8505-sdhc";
reg = <0xd800a000 0x1000>;
interrupts = <20 21>;
clocks = <&sdhc>;
bus-width = <4>;
sdon-inverted;
};

9
Documentation/devicetree/bindings/net/mdio-gpio.txt
View File

@ -8,9 +8,16 @@ gpios property as described in section VIII.1 in the following order:
MDC, MDIO.
Note: Each gpio-mdio bus should have an alias correctly numbered in "aliases"
node.
Example:
mdio {
aliases {
mdio-gpio0 = <&mdio0>;
};
mdio0: mdio {
compatible = "virtual,mdio-gpio";
#address-cells = <1>;
#size-cells = <0>;

141
Documentation/devicetree/bindings/pinctrl/atmel,at91-pinctrl.txt Normal file
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@ -0,0 +1,141 @@
* Atmel AT91 Pinmux Controller
The AT91 Pinmux Controler, enables the IC
to share one PAD to several functional blocks. The sharing is done by
multiplexing the PAD input/output signals. For each PAD there are up to
8 muxing options (called periph modes). Since different modules require
different PAD settings (like pull up, keeper, etc) the contoller controls
also the PAD settings parameters.
Please refer to pinctrl-bindings.txt in this directory for details of the
common pinctrl bindings used by client devices, including the meaning of the
phrase "pin configuration node".
Atmel AT91 pin configuration node is a node of a group of pins which can be
used for a specific device or function. This node represents both mux and config
of the pins in that group. The 'pins' selects the function mode(also named pin
mode) this pin can work on and the 'config' configures various pad settings
such as pull-up, multi drive, etc.
Required properties for iomux controller:
- compatible: "atmel,at91rm9200-pinctrl"
- atmel,mux-mask: array of mask (periph per bank) to describe if a pin can be
configured in this periph mode. All the periph and bank need to be describe.
How to create such array:
Each column will represent the possible peripheral of the pinctrl
Each line will represent a pio bank
Take an example on the 9260
Peripheral: 2 ( A and B)
Bank: 3 (A, B and C)
=>
/* A B */
0xffffffff 0xffc00c3b /* pioA */
0xffffffff 0x7fff3ccf /* pioB */
0xffffffff 0x007fffff /* pioC */
For each peripheral/bank we will descibe in a u32 if a pin can can be
configured in it by putting 1 to the pin bit (1 << pin)
Let's take the pioA on peripheral B
From the datasheet Table 10-2.
Peripheral B
PA0 MCDB0
PA1 MCCDB
PA2
PA3 MCDB3
PA4 MCDB2
PA5 MCDB1
PA6
PA7
PA8
PA9
PA10 ETX2
PA11 ETX3
PA12
PA13
PA14
PA15
PA16
PA17
PA18
PA19
PA20
PA21
PA22 ETXER
PA23 ETX2
PA24 ETX3
PA25 ERX2
PA26 ERX3
PA27 ERXCK
PA28 ECRS
PA29 ECOL
PA30 RXD4
PA31 TXD4
=> 0xffc00c3b
Required properties for pin configuration node:
- atmel,pins: 4 integers array, represents a group of pins mux and config
setting. The format is atmel,pins = <PIN_BANK PIN_BANK_NUM PERIPH CONFIG>.
The PERIPH 0 means gpio.
Bits used for CONFIG:
PULL_UP (1 << 0): indicate this pin need a pull up.
MULTIDRIVE (1 << 1): indicate this pin need to be configured as multidrive.
DEGLITCH (1 << 2): indicate this pin need deglitch.
PULL_DOWN (1 << 3): indicate this pin need a pull down.
DIS_SCHMIT (1 << 4): indicate this pin need to disable schmit trigger.
DEBOUNCE (1 << 16): indicate this pin need debounce.
DEBOUNCE_VAL (0x3fff << 17): debounce val.
NOTE:
Some requirements for using atmel,at91rm9200-pinctrl binding:
1. We have pin function node defined under at91 controller node to represent
what pinmux functions this SoC supports.
2. The driver can use the function node's name and pin configuration node's
name describe the pin function and group hierarchy.
For example, Linux at91 pinctrl driver takes the function node's name
as the function name and pin configuration node's name as group name to
create the map table.
3. Each pin configuration node should have a phandle, devices can set pins
configurations by referring to the phandle of that pin configuration node.
4. The gpio controller must be describe in the pinctrl simple-bus.
Examples:
pinctrl@fffff400 {
#address-cells = <1>;
#size-cells = <1>;
ranges;
compatible = "atmel,at91rm9200-pinctrl", "simple-bus";
reg = <0xfffff400 0x600>;
atmel,mux-mask = <
/* A B */
0xffffffff 0xffc00c3b /* pioA */
0xffffffff 0x7fff3ccf /* pioB */
0xffffffff 0x007fffff /* pioC */
>;
/* shared pinctrl settings */
dbgu {
pinctrl_dbgu: dbgu-0 {
atmel,pins =
<1 14 0x1 0x0 /* PB14 periph A */
1 15 0x1 0x1>; /* PB15 periph with pullup */
};
};
};
dbgu: serial@fffff200 {
compatible = "atmel,at91sam9260-usart";
reg = <0xfffff200 0x200>;
interrupts = <1 4 7>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_dbgu>;
status = "disabled";
};

18
Documentation/devicetree/bindings/rtc/orion-rtc.txt Normal file
View File

@ -0,0 +1,18 @@
* Mvebu Real Time Clock
RTC controller for the Kirkwood, the Dove, the Armada 370 and the
Armada XP SoCs
Required properties:
- compatible : Should be "marvell,orion-rtc"
- reg: physical base address of the controller and length of memory mapped
region.
- interrupts: IRQ line for the RTC.
Example:
rtc@10300 {
compatible = "marvell,orion-rtc";
reg = <0xd0010300 0x20>;
interrupts = <50>;
};

8
Documentation/devicetree/bindings/tty/serial/fsl-mxs-auart.txt
View File

@ -6,11 +6,19 @@ Required properties:
- reg : Address and length of the register set for the device
- interrupts : Should contain the auart interrupt numbers
Optional properties:
- fsl,auart-dma-channel : The DMA channels, the first is for RX, the other
is for TX. If you add this property, it also means that you
will enable the DMA support for the auart.
Note: due to the hardware bug in imx23(see errata : 2836),
only the imx28 can enable the DMA support for the auart.
Example:
auart0: serial@8006a000 {
compatible = "fsl,imx28-auart", "fsl,imx23-auart";
reg = <0x8006a000 0x2000>;
interrupts = <112 70 71>;
fsl,auart-dma-channel = <8 9>;
};
Note: Each auart port should have an alias correctly numbered in "aliases"

5
Documentation/devicetree/bindings/tty/serial/of-serial.txt
View File

@ -14,7 +14,10 @@ Required properties:
- "serial" if the port type is unknown.
- reg : offset and length of the register set for the device.
- interrupts : should contain uart interrupt.
- clock-frequency : the input clock frequency for the UART.
- clock-frequency : the input clock frequency for the UART
or
clocks phandle to refer to the clk used as per Documentation/devicetree
/bindings/clock/clock-bindings.txt
Optional properties:
- current-speed : the current active speed of the UART.

8
Documentation/devicetree/bindings/usb/am33xx-usb.txt
View File

@ -3,12 +3,12 @@ AM33XX MUSB GLUE
- ti,hwmods : must be "usb_otg_hs"
- multipoint : Should be "1" indicating the musb controller supports
multipoint. This is a MUSB configuration-specific setting.
- num_eps : Specifies the number of endpoints. This is also a
- num-eps : Specifies the number of endpoints. This is also a
MUSB configuration-specific setting. Should be set to "16"
- ram_bits : Specifies the ram address size. Should be set to "12"
- port0_mode : Should be "3" to represent OTG. "1" signifies HOST and "2"
- ram-bits : Specifies the ram address size. Should be set to "12"
- port0-mode : Should be "3" to represent OTG. "1" signifies HOST and "2"
represents PERIPHERAL.
- port1_mode : Should be "1" to represent HOST. "3" signifies OTG and "2"
- port1-mode : Should be "1" to represent HOST. "3" signifies OTG and "2"
represents PERIPHERAL.
- power : Should be "250". This signifies the controller can supply upto
500mA when operating in host mode.

6
Documentation/devicetree/bindings/vendor-prefixes.txt
View File

@ -5,6 +5,7 @@ using them to avoid name-space collisions.
ad Avionic Design GmbH
adi Analog Devices, Inc.
ak Asahi Kasei Corp.
amcc Applied Micro Circuits Corporation (APM, formally AMCC)
apm Applied Micro Circuits Corporation (APM)
arm ARM Ltd.
@ -25,6 +26,7 @@ gef GE Fanuc Intelligent Platforms Embedded Systems, Inc.
hp Hewlett Packard
ibm International Business Machines (IBM)
idt Integrated Device Technologies, Inc.
img Imagination Technologies Ltd.
intercontrol Inter Control Group
linux Linux-specific binding
marvell Marvell Technology Group Ltd.
@ -34,8 +36,9 @@ national National Semiconductor
nintendo Nintendo
nvidia NVIDIA
nxp NXP Semiconductors
onnn ON Semiconductor Corp.
picochip Picochip Ltd
powervr Imagination Technologies
powervr PowerVR (deprecated, use img)
qcom Qualcomm, Inc.
ramtron Ramtron International
realtek Realtek Semiconductor Corp.
@ -45,6 +48,7 @@ schindler Schindler
sil Silicon Image
simtek
sirf SiRF Technology, Inc.
snps Synopsys, Inc.
st STMicroelectronics
stericsson ST-Ericsson
ti Texas Instruments

2
Documentation/devicetree/usage-model.txt
View File

@ -347,7 +347,7 @@ later), which will happily live at the base of the Linux /sys/devices
tree. Therefore, if a DT node is at the root of the tree, then it
really probably is best registered as a platform_device.
Linux board support code calls of_platform_populate(NULL, NULL, NULL)
Linux board support code calls of_platform_populate(NULL, NULL, NULL, NULL)
to kick off discovery of devices at the root of the tree. The
parameters are all NULL because when starting from the root of the
tree, there is no need to provide a starting node (the first NULL), a

16
Documentation/filesystems/proc.txt
View File

@ -33,7 +33,7 @@ Table of Contents
2 Modifying System Parameters
3 Per-Process Parameters
3.1 /proc/<pid>/oom_score_adj - Adjust the oom-killer
3.1 /proc/<pid>/oom_adj & /proc/<pid>/oom_score_adj - Adjust the oom-killer
score
3.2 /proc/<pid>/oom_score - Display current oom-killer score
3.3 /proc/<pid>/io - Display the IO accounting fields
@ -1320,10 +1320,10 @@ of the kernel.
CHAPTER 3: PER-PROCESS PARAMETERS
------------------------------------------------------------------------------
3.1 /proc/<pid>/oom_score_adj- Adjust the oom-killer score
3.1 /proc/<pid>/oom_adj & /proc/<pid>/oom_score_adj- Adjust the oom-killer score
--------------------------------------------------------------------------------
This file can be used to adjust the badness heuristic used to select which
These file can be used to adjust the badness heuristic used to select which
process gets killed in out of memory conditions.
The badness heuristic assigns a value to each candidate task ranging from 0
@ -1361,6 +1361,12 @@ same system, cpuset, mempolicy, or memory controller resources to use at least
equivalent to discounting 50% of the task's allowed memory from being considered
as scoring against the task.
For backwards compatibility with previous kernels, /proc/<pid>/oom_adj may also
be used to tune the badness score. Its acceptable values range from -16
(OOM_ADJUST_MIN) to +15 (OOM_ADJUST_MAX) and a special value of -17
(OOM_DISABLE) to disable oom killing entirely for that task. Its value is
scaled linearly with /proc/<pid>/oom_score_adj.
The value of /proc/<pid>/oom_score_adj may be reduced no lower than the last
value set by a CAP_SYS_RESOURCE process. To reduce the value any lower
requires CAP_SYS_RESOURCE.
@ -1375,7 +1381,9 @@ minimal amount of work.
-------------------------------------------------------------
This file can be used to check the current score used by the oom-killer is for
any given <pid>.
any given <pid>. Use it together with /proc/<pid>/oom_score_adj to tune which
process should be killed in an out-of-memory situation.
3.3 /proc/<pid>/io - Display the IO accounting fields
-------------------------------------------------------

12
Documentation/firmware_class/README
View File

@ -22,12 +22,17 @@
- calls request_firmware(&fw_entry, $FIRMWARE, device)
- kernel searchs the fimware image with name $FIRMWARE directly
in the below search path of root filesystem:
User customized search path by module parameter 'path'[1]
"/lib/firmware/updates/" UTS_RELEASE,
"/lib/firmware/updates",
"/lib/firmware/" UTS_RELEASE,
"/lib/firmware"
- If found, goto 7), else goto 2)
[1], the 'path' is a string parameter which length should be less
than 256, user should pass 'firmware_class.path=$CUSTOMIZED_PATH'
if firmware_class is built in kernel(the general situation)
2), userspace:
- /sys/class/firmware/xxx/{loading,data} appear.
- hotplug gets called with a firmware identifier in $FIRMWARE
@ -114,3 +119,10 @@
on the setup, so I think that the choice on what firmware to make
persistent should be left to userspace.
about firmware cache:
--------------------
After firmware cache mechanism is introduced during system sleep,
request_firmware can be called safely inside device's suspend and
resume callback, and callers need't cache the firmware by
themselves any more for dealing with firmware loss during system
resume.

42
Documentation/gpio.txt
View File

@ -439,6 +439,48 @@ slower clock delays the rising edge of SCK, and the I2C master adjusts its
signaling rate accordingly.
GPIO controllers and the pinctrl subsystem
------------------------------------------
A GPIO controller on a SOC might be tightly coupled with the pinctrl
subsystem, in the sense that the pins can be used by other functions
together with an optional gpio feature. We have already covered the
case where e.g. a GPIO controller need to reserve a pin or set the
direction of a pin by calling any of:
pinctrl_request_gpio()
pinctrl_free_gpio()
pinctrl_gpio_direction_input()
pinctrl_gpio_direction_output()
But how does the pin control subsystem cross-correlate the GPIO
numbers (which are a global business) to a certain pin on a certain
pin controller?
This is done by registering "ranges" of pins, which are essentially
cross-reference tables. These are described in
Documentation/pinctrl.txt
While the pin allocation is totally managed by the pinctrl subsystem,
gpio (under gpiolib) is still maintained by gpio drivers. It may happen
that different pin ranges in a SoC is managed by different gpio drivers.
This makes it logical to let gpio drivers announce their pin ranges to
the pin ctrl subsystem before it will call 'pinctrl_request_gpio' in order
to request the corresponding pin to be prepared by the pinctrl subsystem
before any gpio usage.
For this, the gpio controller can register its pin range with pinctrl
subsystem. There are two ways of doing it currently: with or without DT.
For with DT support refer to Documentation/devicetree/bindings/gpio/gpio.txt.
For non-DT support, user can call gpiochip_add_pin_range() with appropriate
parameters to register a range of gpio pins with a pinctrl driver. For this
exact name string of pinctrl device has to be passed as one of the
argument to this routine.
What do these conventions omit?
===============================
One of the biggest things these conventions omit is pin multiplexing, since

46
Documentation/hwmon/ads7828
View File

@ -4,29 +4,47 @@ Kernel driver ads7828
Supported chips:
* Texas Instruments/Burr-Brown ADS7828
Prefix: 'ads7828'
Addresses scanned: I2C 0x48, 0x49, 0x4a, 0x4b
Datasheet: Publicly available at the Texas Instruments website :
Datasheet: Publicly available at the Texas Instruments website:
http://focus.ti.com/lit/ds/symlink/ads7828.pdf
* Texas Instruments ADS7830
Prefix: 'ads7830'
Datasheet: Publicly available at the Texas Instruments website:
http://focus.ti.com/lit/ds/symlink/ads7830.pdf
Authors:
Steve Hardy <shardy@redhat.com>
Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Guillaume Roguez <guillaume.roguez@savoirfairelinux.com>
Module Parameters
-----------------
Platform data
-------------
* se_input: bool (default Y)
Single ended operation - set to N for differential mode
* int_vref: bool (default Y)
Operate with the internal 2.5V reference - set to N for external reference
* vref_mv: int (default 2500)
If using an external reference, set this to the reference voltage in mV
The ads7828 driver accepts an optional ads7828_platform_data structure (defined
in include/linux/platform_data/ads7828.h). The structure fields are:
* diff_input: (bool) Differential operation
set to true for differential mode, false for default single ended mode.
* ext_vref: (bool) External reference
set to true if it operates with an external reference, false for default
internal reference.
* vref_mv: (unsigned int) Voltage reference
if using an external reference, set this to the reference voltage in mV,
otherwise it will default to the internal value (2500mV). This value will be
bounded with limits accepted by the chip, described in the datasheet.
If no structure is provided, the configuration defaults to single ended
operation and internal voltage reference (2.5V).
Description
-----------
This driver implements support for the Texas Instruments ADS7828.
This driver implements support for the Texas Instruments ADS7828 and ADS7830.
This device is a 12-bit 8-channel A-D converter.
The ADS7828 device is a 12-bit 8-channel A/D converter, while the ADS7830 does
8-bit sampling.
It can operate in single ended mode (8 +ve inputs) or in differential mode,
where 4 differential pairs can be measured.
@ -34,3 +52,7 @@ where 4 differential pairs can be measured.
The chip also has the facility to use an external voltage reference. This
may be required if your hardware supplies the ADS7828 from a 5V supply, see
the datasheet for more details.
There is no reliable way to identify this chip, so the driver will not scan
some addresses to try to auto-detect it. That means that you will have to
statically declare the device in the platform support code.

2
Documentation/hwmon/coretemp
View File

@ -98,8 +98,10 @@ Process Processor TjMax(C)
45nm Atom Processors
D525/510/425/410 100
Z670/650 90
Z560/550/540/530P/530/520PT/520/515/510PT/510P 90
Z510/500 90
N570/550 100
N475/470/455/450 100
N280/270 90
330/230 125

47
Documentation/hwmon/da9055 Normal file
View File

@ -0,0 +1,47 @@
Supported chips:
* Dialog Semiconductors DA9055 PMIC
Prefix: 'da9055'
Datasheet: Datasheet is not publicly available.
Authors: David Dajun Chen <dchen@diasemi.com>
Description
-----------
The DA9055 provides an Analogue to Digital Converter (ADC) with 10 bits
resolution and track and hold circuitry combined with an analogue input
multiplexer. The analogue input multiplexer will allow conversion of up to 5
different inputs. The track and hold circuit ensures stable input voltages at
the input of the ADC during the conversion.
The ADC is used to measure the following inputs:
Channel 0: VDDOUT - measurement of the system voltage
Channel 1: ADC_IN1 - high impedance input (0 - 2.5V)
Channel 2: ADC_IN2 - high impedance input (0 - 2.5V)
Channel 3: ADC_IN3 - high impedance input (0 - 2.5V)
Channel 4: Internal Tjunc. - sense (internal temp. sensor)
By using sysfs attributes we can measure the system voltage VDDOUT,
chip junction temperature and auxiliary channels voltages.
Voltage Monitoring
------------------
Voltages are sampled in a AUTO mode it can be manually sampled too and results
are stored in a 10 bit ADC.
The system voltage is calculated as:
Milli volt = ((ADC value * 1000) / 85) + 2500
The voltages on ADC channels 1, 2 and 3 are calculated as:
Milli volt = (ADC value * 1000) / 102
Temperature Monitoring
----------------------
Temperatures are sampled by a 10 bit ADC. Junction temperatures
are monitored by the ADC channels.
The junction temperature is calculated:
Degrees celsius = -0.4084 * (ADC_RES - T_OFFSET) + 307.6332
The junction temperature attribute is supported by the driver.

17
Documentation/kbuild/makefiles.txt
View File

@ -1175,15 +1175,16 @@ When kbuild executes, the following steps are followed (roughly):
in an init section in the image. Platform code *must* copy the
blob to non-init memory prior to calling unflatten_device_tree().
To use this command, simply add *.dtb into obj-y or targets, or make
some other target depend on %.dtb
A central rule exists to create $(obj)/%.dtb from $(src)/%.dts;
architecture Makefiles do no need to explicitly write out that rule.
Example:
#arch/x86/platform/ce4100/Makefile
clean-files := *dtb.S
DTC_FLAGS := -p 1024
obj-y += foo.dtb.o
$(obj)/%.dtb: $(src)/%.dts
$(call cmd,dtc)
targets += $(dtb-y)
clean-files += *.dtb
DTC_FLAGS ?= -p 1024
--- 6.8 Custom kbuild commands

55
Documentation/kernel-parameters.txt
View File

@ -1304,6 +1304,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
lapic [X86-32,APIC] Enable the local APIC even if BIOS
disabled it.
lapic= [x86,APIC] "notscdeadline" Do not use TSC deadline
value for LAPIC timer one-shot implementation. Default
back to the programmable timer unit in the LAPIC.
lapic_timer_c2_ok [X86,APIC] trust the local apic timer
in C2 power state.
@ -1984,6 +1988,20 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
nox2apic [X86-64,APIC] Do not enable x2APIC mode.
cpu0_hotplug [X86] Turn on CPU0 hotplug feature when
CONFIG_BOOTPARAM_HOTPLUG_CPU0 is off.
Some features depend on CPU0. Known dependencies are:
1. Resume from suspend/hibernate depends on CPU0.
Suspend/hibernate will fail if CPU0 is offline and you
need to online CPU0 before suspend/hibernate.
2. PIC interrupts also depend on CPU0. CPU0 can't be
removed if a PIC interrupt is detected.
It's said poweroff/reboot may depend on CPU0 on some
machines although I haven't seen such issues so far
after CPU0 is offline on a few tested machines.
If the dependencies are under your control, you can
turn on cpu0_hotplug.
nptcg= [IA-64] Override max number of concurrent global TLB
purges which is reported from either PAL_VM_SUMMARY or
SAL PALO.
@ -2394,6 +2412,27 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
ramdisk_size= [RAM] Sizes of RAM disks in kilobytes
See Documentation/blockdev/ramdisk.txt.
rcu_nocbs= [KNL,BOOT]
In kernels built with CONFIG_RCU_NOCB_CPU=y, set
the specified list of CPUs to be no-callback CPUs.
Invocation of these CPUs' RCU callbacks will
be offloaded to "rcuoN" kthreads created for
that purpose. This reduces OS jitter on the
offloaded CPUs, which can be useful for HPC and
real-time workloads. It can also improve energy
efficiency for asymmetric multiprocessors.
rcu_nocbs_poll [KNL,BOOT]
Rather than requiring that offloaded CPUs
(specified by rcu_nocbs= above) explicitly
awaken the corresponding "rcuoN" kthreads,
make these kthreads poll for callbacks.
This improves the real-time response for the
offloaded CPUs by relieving them of the need to
wake up the corresponding kthread, but degrades
energy efficiency by requiring that the kthreads
periodically wake up to do the polling.
rcutree.blimit= [KNL,BOOT]
Set maximum number of finished RCU callbacks to process
in one batch.
@ -2859,6 +2898,22 @@ bytes respectively. Such letter suffixes can also be entirely omitted.
to facilitate early boot debugging.
See also Documentation/trace/events.txt
trace_options=[option-list]
[FTRACE] Enable or disable tracer options at boot.
The option-list is a comma delimited list of options
that can be enabled or disabled just as if you were
to echo the option name into
/sys/kernel/debug/tracing/trace_options
For example, to enable stacktrace option (to dump the
stack trace of each event), add to the command line:
trace_options=stacktrace
See also Documentation/trace/ftrace.txt "trace options"
section.
transparent_hugepage=
[KNL]
Format: [always|madvise|never]

9
Documentation/memory-barriers.txt
View File

@ -251,12 +251,13 @@ And there are a number of things that _must_ or _must_not_ be assumed:
And for:
*A = X; Y = *A;
*A = X; *(A + 4) = Y;
we may get either of:
we may get any of:
STORE *A = X; Y = LOAD *A;
STORE *A = Y = X;
STORE *A = X; STORE *(A + 4) = Y;
STORE *(A + 4) = Y; STORE *A = X;
STORE {*A, *(A + 4) } = {X, Y};
=========================

19
Documentation/memory-hotplug.txt
View File

@ -161,7 +161,8 @@ a recent addition and not present on older kernels.
in the memory block.
'state' : read-write
at read: contains online/offline state of memory.
at write: user can specify "online", "offline" command
at write: user can specify "online_kernel",
"online_movable", "online", "offline" command
which will be performed on al sections in the block.
'phys_device' : read-only: designed to show the name of physical memory
device. This is not well implemented now.
@ -255,6 +256,17 @@ For onlining, you have to write "online" to the section's state file as:
% echo online > /sys/devices/system/memory/memoryXXX/state
This onlining will not change the ZONE type of the target memory section,
If the memory section is in ZONE_NORMAL, you can change it to ZONE_MOVABLE:
% echo online_movable > /sys/devices/system/memory/memoryXXX/state
(NOTE: current limit: this memory section must be adjacent to ZONE_MOVABLE)
And if the memory section is in ZONE_MOVABLE, you can change it to ZONE_NORMAL:
% echo online_kernel > /sys/devices/system/memory/memoryXXX/state
(NOTE: current limit: this memory section must be adjacent to ZONE_NORMAL)
After this, section memoryXXX's state will be 'online' and the amount of
available memory will be increased.
@ -377,15 +389,18 @@ The third argument is passed by pointer of struct memory_notify.
struct memory_notify {
unsigned long start_pfn;
unsigned long nr_pages;
int status_change_nid_normal;
int status_change_nid;
}
start_pfn is start_pfn of online/offline memory.
nr_pages is # of pages of online/offline memory.
status_change_nid_normal is set node id when N_NORMAL_MEMORY of nodemask
is (will be) set/clear, if this is -1, then nodemask status is not changed.
status_change_nid is set node id when N_HIGH_MEMORY of nodemask is (will be)
set/clear. It means a new(memoryless) node gets new memory by online and a
node loses all memory. If this is -1, then nodemask status is not changed.
If status_changed_nid >= 0, callback should create/discard structures for the
If status_changed_nid* >= 0, callback should create/discard structures for the
node if necessary.
--------------

7
Documentation/mmc/mmc-dev-attrs.txt
View File

@ -25,6 +25,8 @@ All attributes are read-only.
serial Product Serial Number (from CID Register)
erase_size Erase group size
preferred_erase_size Preferred erase size
raw_rpmb_size_mult RPMB partition size
rel_sectors Reliable write sector count
Note on Erase Size and Preferred Erase Size:
@ -65,6 +67,11 @@ Note on Erase Size and Preferred Erase Size:
"preferred_erase_size" is in bytes.
Note on raw_rpmb_size_mult:
"raw_rpmb_size_mult" is a mutliple of 128kB block.
RPMB size in byte is calculated by using the following equation:
RPMB partition size = 128kB x raw_rpmb_size_mult
SD/MMC/SDIO Clock Gating Attribute
==================================

2
Documentation/networking/netdev-features.txt
View File

@ -164,4 +164,4 @@ read the CRC recorded by the NIC on receipt of the packet.
This requests that the NIC receive all possible frames, including errored
frames (such as bad FCS, etc). This can be helpful when sniffing a link with
bad packets on it. Some NICs may receive more packets if also put into normal
PROMISC mdoe.
PROMISC mode.

4
Documentation/networking/vxlan.txt
View File

@ -32,7 +32,7 @@ no entry is in the forwarding table.
# ip link delete vxlan0
3. Show vxlan info
# ip -d show vxlan0
# ip -d link show vxlan0
It is possible to create, destroy and display the vxlan
forwarding table using the new bridge command.
@ -41,7 +41,7 @@ forwarding table using the new bridge command.
# bridge fdb add to 00:17:42:8a:b4:05 dst 192.19.0.2 dev vxlan0
2. Delete forwarding table entry
# bridge fdb delete 00:17:42:8a:b4:05
# bridge fdb delete 00:17:42:8a:b4:05 dev vxlan0
3. Show forwarding table
# bridge fdb show dev vxlan0

7
Documentation/pinctrl.txt
View File

@ -364,6 +364,9 @@ will get an pin number into its handled number range. Further it is also passed
the range ID value, so that the pin controller knows which range it should
deal with.
Calling pinctrl_add_gpio_range from pinctrl driver is DEPRECATED. Please see
section 2.1 of Documentation/devicetree/bindings/gpio/gpio.txt on how to bind
pinctrl and gpio drivers.
PINMUX interfaces
=================
@ -1193,4 +1196,6 @@ foo_switch()
...
}
The above has to be done from process context.
The above has to be done from process context. The reservation of the pins
will be done when the state is activated, so in effect one specific pin
can be used by different functions at different times on a running system.

2
Documentation/power/pm_qos_interface.txt
View File

@ -99,7 +99,7 @@ reading the aggregated value does not require any locking mechanism.
From kernel mode the use of this interface is the following:
int dev_pm_qos_add_request(device, handle, value):
int dev_pm_qos_add_request(device, handle, type, value):
Will insert an element into the list for that identified device with the
target value. Upon change to this list the new target is recomputed and any
registered notifiers are called only if the target value is now different.

4
Documentation/telephony/00-INDEX
View File

@ -1,4 +0,0 @@
00-INDEX
- this file.
ixj.txt
- document describing the Quicknet drivers.

394
Documentation/telephony/ixj.txt
View File

@ -1,394 +0,0 @@
Linux Quicknet-Drivers-Howto
Quicknet Technologies, Inc. (www.quicknet.net)
Version 0.3.4 December 18, 1999
1.0 Introduction
This document describes the first GPL release version of the Linux
driver for the Quicknet Internet PhoneJACK and Internet LineJACK
cards. More information about these cards is available at
www.quicknet.net. The driver version discussed in this document is
0.3.4.
These cards offer nice telco style interfaces to use your standard
telephone/key system/PBX as the user interface for VoIP applications.
The Internet LineJACK also offers PSTN connectivity for a single line
Internet to PSTN gateway. Of course, you can add more than one card
to a system to obtain multi-line functionality. At this time, the
driver supports the POTS port on both the Internet PhoneJACK and the
Internet LineJACK, but the PSTN port on the latter card is not yet
supported.
This document, and the drivers for the cards, are intended for a
limited audience that includes technically capable programmers who
would like to experiment with Quicknet cards. The drivers are
considered in ALPHA status and are not yet considered stable enough
for general, widespread use in an unlimited audience.
That's worth saying again:
THE LINUX DRIVERS FOR QUICKNET CARDS ARE PRESENTLY IN A ALPHA STATE
AND SHOULD NOT BE CONSIDERED AS READY FOR NORMAL WIDESPREAD USE.
They are released early in the spirit of Internet development and to
make this technology available to innovators who would benefit from
early exposure.
When we promote the device driver to "beta" level it will be
considered ready for non-programmer, non-technical users. Until then,
please be aware that these drivers may not be stable and may affect
the performance of your system.
1.1 Latest Additions/Improvements
The 0.3.4 version of the driver is the first GPL release. Several
features had to be removed from the prior binary only module, mostly
for reasons of Intellectual Property rights. We can't release
information that is not ours - so certain aspects of the driver had to
be removed to protect the rights of others.
Specifically, very old Internet PhoneJACK cards have non-standard
G.723.1 codecs (due to the early nature of the DSPs in those days).
The auto-conversion code to bring those cards into compliance with
today's standards is available as a binary only module to those people
needing it. If you bought your card after 1997 or so, you are OK -
it's only the very old cards that are affected.
Also, the code to download G.728/G.729/G.729a codecs to the DSP is
available as a binary only module as well. This IP is not ours to
release.
Hooks are built into the GPL driver to allow it to work with other
companion modules that are completely separate from this module.
1.2 Copyright, Trademarks, Disclaimer, & Credits
Copyright
Copyright (c) 1999 Quicknet Technologies, Inc. Permission is granted
to freely copy and distribute this document provided you preserve it
in its original form. For corrections and minor changes contact the
maintainer at linux@quicknet.net.
Trademarks
Internet PhoneJACK and Internet LineJACK are registered trademarks of
Quicknet Technologies, Inc.
Disclaimer
Much of the info in this HOWTO is early information released by
Quicknet Technologies, Inc. for the express purpose of allowing early
testing and use of the Linux drivers developed for their products.
While every attempt has been made to be thorough, complete and
accurate, the information contained here may be unreliable and there
are likely a number of errors in this document. Please let the
maintainer know about them. Since this is free documentation, it
should be obvious that neither I nor previous authors can be held
legally responsible for any errors.
Credits
This HOWTO was written by:
Greg Herlein <gherlein@quicknet.net>
Ed Okerson <eokerson@quicknet.net>
1.3 Future Plans: You Can Help
Please let the maintainer know of any errors in facts, opinions,
logic, spelling, grammar, clarity, links, etc. But first, if the date
is over a month old, check to see that you have the latest
version. Please send any info that you think belongs in this document.
You can also contribute code and/or bug-fixes for the sample
applications.
1.4 Where to get things
Info on latest versions of the driver are here:
http://web.archive.org/web/*/http://www.quicknet.net/develop.htm
1.5 Mailing List
Quicknet operates a mailing list to provide a public forum on using
these drivers.
To subscribe to the linux-sdk mailing list, send an email to:
majordomo@linux.quicknet.net
In the body of the email, type:
subscribe linux-sdk <your-email-address>
Please delete any signature block that you would normally add to the
bottom of your email - it tends to confuse majordomo.
To send mail to the list, address your mail to
linux-sdk@linux.quicknet.net
Your message will go out to everyone on the list.
To unsubscribe to the linux-sdk mailing list, send an email to:
majordomo@linux.quicknet.net
In the body of the email, type:
unsubscribe linux-sdk <your-email-address>
2.0 Requirements
2.1 Quicknet Card(s)
You will need at least one Internet PhoneJACK or Internet LineJACK
cards. These are ISA or PCI bus devices that use Plug-n-Play for
configuration, and use no IRQs. The driver will support up to 16
cards in any one system, of any mix between the two types.
Note that you will need two cards to do any useful testing alone, since
you will need a card on both ends of the connection. Of course, if
you are doing collaborative work, perhaps your friends or coworkers
have cards too. If not, we'll gladly sell them some!
2.2 ISAPNP
Since the Quicknet cards are Plug-n-Play devices, you will need the
isapnp tools package to configure the cards, or you can use the isapnp
module to autoconfigure them. The former package probably came with
your Linux distribution. Documentation on this package is available
online at:
http://mailer.wiwi.uni-marburg.de/linux/LDP/HOWTO/Plug-and-Play-HOWTO.html
The isapnp autoconfiguration is available on the Quicknet website at:
http://www.quicknet.net/develop.htm
though it may be in the kernel by the time you read this.
3.0 Card Configuration
If you did not get your drivers as part of the linux kernel, do the
following to install them:
a. untar the distribution file. We use the following command:
tar -xvzf ixj-0.x.x.tgz
This creates a subdirectory holding all the necessary files. Go to that
subdirectory.
b. run the "ixj_dev_create" script to remove any stray device
files left in the /dev directory, and to create the new officially
designated device files. Note that the old devices were called
/dev/ixj, and the new method uses /dev/phone.
c. type "make;make install" - this will compile and install the
module.
d. type "depmod -av" to rebuild all your kernel version dependencies.
e. if you are using the isapnp module to configure the cards
automatically, then skip to step f. Otherwise, ensure that you
have run the isapnp configuration utility to properly configure
the cards.
e1. The Internet PhoneJACK has one configuration register that
requires 16 IO ports. The Internet LineJACK card has two
configuration registers and isapnp reports that IO 0
requires 16 IO ports and IO 1 requires 8. The Quicknet
driver assumes that these registers are configured to be
contiguous, i.e. if IO 0 is set to 0x340 then IO 1 should
be set to 0x350.
Make sure that none of the cards overlap if you have
multiple cards in the system.
If you are new to the isapnp tools, you can jumpstart
yourself by doing the following:
e2. go to the /etc directory and run pnpdump to get a blank
isapnp.conf file.
pnpdump > /etc/isapnp.conf
e3. edit the /etc/isapnp.conf file to set the IO warnings and
the register IO addresses. The IO warnings means that you
should find the line in the file that looks like this:
(CONFLICT (IO FATAL)(IRQ FATAL)(DMA FATAL)(MEM FATAL)) # or WARNING
and you should edit the line to look like this:
(CONFLICT (IO WARNING)(IRQ FATAL)(DMA FATAL)(MEM FATAL)) #
or WARNING
The next step is to set the IO port addresses. The issue
here is that isapnp does not identify all of the ports out
there. Specifically any device that does not have a driver
or module loaded by Linux will not be registered. This
includes older sound cards and network cards. We have
found that the IO port 0x300 is often used even though
isapnp claims that no-one is using those ports. We
recommend that for a single card installation that port
0x340 (and 0x350) be used. The IO port line should change
from this:
(IO 0 (SIZE 16) (BASE 0x0300) (CHECK))
to this:
(IO 0 (SIZE 16) (BASE 0x0340) )
e4. if you have multiple Quicknet cards, make sure that you do
not have any overlaps. Be especially careful if you are
mixing Internet PhoneJACK and Internet LineJACK cards in
the same system. In these cases we recommend moving the
IO port addresses to the 0x400 block. Please note that on
a few machines the 0x400 series are used. Feel free to
experiment with other addresses. Our cards have been
proven to work using IO addresses of up to 0xFF0.
e5. the last step is to uncomment the activation line so the
drivers will be associated with the port. This means the
line (immediately below) the IO line should go from this:
# (ACT Y)
to this:
(ACT Y)
Once you have finished editing the isapnp.conf file you
must submit it into the pnp driverconfigure the cards.
This is done using the following command:
isapnp isapnp.conf
If this works you should see a line that identifies the
Quicknet device, the IO port(s) chosen, and a message
"Enabled OK".
f. if you are loading the module by hand, use insmod. An example
of this would look like this:
insmod phonedev
insmod ixj dspio=0x320,0x310 xio=0,0x330
Then verify the module loaded by running lsmod. If you are not using a
module that matches your kernel version, you may need to "force" the
load using the -f option in the insmod command.
insmod phonedev
insmod -f ixj dspio=0x320,0x310 xio=0,0x330
If you are using isapnp to autoconfigure your card, then you do NOT
need any of the above, though you need to use depmod to load the
driver, like this:
depmod ixj
which will result in the needed drivers getting loaded automatically.
g. if you are planning on having the kernel automatically request
the module for you, then you need to edit /etc/conf.modules and add the
following lines:
options ixj dspio=0x340 xio=0x330 ixjdebug=0
If you do this, then when you execute an application that uses the
module the kernel will request that it is loaded.
h. if you want non-root users to be able to read and write to the
ixj devices (this is a good idea!) you should do the following:
- decide upon a group name to use and create that group if
needed. Add the user names to that group that you wish to
have access to the device. For example, we typically will
create a group named "ixj" in /etc/group and add all users
to that group that we want to run software that can use the
ixjX devices.
- change the permissions on the device files, like this:
chgrp ixj /dev/ixj*
chmod 660 /dev/ixj*
Once this is done, then non-root users should be able to use the
devices. If you have enabled autoloading of modules, then the user
should be able to open the device and have the module loaded
automatically for them.
4.0 Driver Installation problems.
We have tested these drivers on the 2.2.9, 2.2.10, 2.2.12, and 2.2.13 kernels
and in all cases have eventually been able to get the drivers to load and
run. We have found four types of problems that prevent this from happening.
The problems and solutions are:
a. A step was missed in the installation. Go back and use section 3
as a checklist. Many people miss running the ixj_dev_create script and thus
never load the device names into the filesystem.
b. The kernel is inconsistently linked. We have found this problem in
the Out Of the Box installation of several distributions. The symptoms
are that neither driver will load, and that the unknown symbols include "jiffy"
and "kmalloc". The solution is to recompile both the kernel and the
modules. The command string for the final compile looks like this:
In the kernel directory:
1. cp .config /tmp
2. make mrproper
3. cp /tmp/.config .
4. make clean;make bzImage;make modules;make modules_install
This rebuilds both the kernel and all the modules and makes sure they all
have the same linkages. This generally solves the problem once the new
kernel is installed and the system rebooted.
c. The kernel has been patched, then unpatched. This happens when
someone decides to use an earlier kernel after they load a later kernel.
The symptoms are proceeding through all three above steps and still not
being able to load the driver. What has happened is that the generated
header files are out of sync with the kernel itself. The solution is
to recompile (again) using "make mrproper". This will remove and then
regenerate all the necessary header files. Once this is done, then you
need to install and reboot the kernel. We have not seen any problem
loading one of our drivers after this treatment.
5.0 Known Limitations
We cannot currently play "dial-tone" and listen for DTMF digits at the
same time using the ISA PhoneJACK. This is a bug in the 8020 DSP chip
used on that product. All other Quicknet products function normally
in this regard. We have a work-around, but it's not done yet. Until
then, if you want dial-tone, you can always play a recorded dial-tone
sound into the audio until you have gathered the DTMF digits.

7
Documentation/usb/error-codes.txt
View File

@ -21,6 +21,8 @@ Non-USB-specific:
USB-specific:
-EBUSY The URB is already active.
-ENODEV specified USB-device or bus doesn't exist
-ENOENT specified interface or endpoint does not exist or
@ -35,9 +37,8 @@ USB-specific:
d) ISO: number_of_packets is < 0
e) various other cases
-EAGAIN a) specified ISO start frame too early
b) (using ISO-ASAP) too much scheduled for the future
wait some time and try again.
-EXDEV ISO: URB_ISO_ASAP wasn't specified and all the frames
the URB would be scheduled in have already expired.
-EFBIG Host controller driver can't schedule that many ISO frames.

15
Documentation/usb/mass-storage.txt
View File

@ -20,9 +20,9 @@
This document describes how to use the gadget from user space, its
relation to mass storage function (or MSF) and different gadgets
using it, and how it differs from File Storage Gadget (or FSG). It
will talk only briefly about how to use MSF within composite
gadgets.
using it, and how it differs from File Storage Gadget (or FSG)
(which is no longer included in Linux). It will talk only briefly
about how to use MSF within composite gadgets.
* Module parameters
@ -198,16 +198,15 @@
The Mass Storage Function and thus the Mass Storage Gadget has been
based on the File Storage Gadget. The difference between the two is
that MSG is a composite gadget (ie. uses the composite framework)
while file storage gadget is a traditional gadget. From userspace
while file storage gadget was a traditional gadget. From userspace
point of view this distinction does not really matter, but from
kernel hacker's point of view, this means that (i) MSG does not
duplicate code needed for handling basic USB protocol commands and
(ii) MSF can be used in any other composite gadget.
Because of that, File Storage Gadget has been deprecated and
scheduled to be removed in Linux 3.8. All users need to transition
to the Mass Storage Gadget by that time. The two gadgets behave
mostly the same from the outside except:
Because of that, File Storage Gadget has been removed in Linux 3.8.
All users need to transition to the Mass Storage Gadget. The two
gadgets behave mostly the same from the outside except:
1. In FSG the “removable” and “cdrom” module parameters set the flag
for all logical units whereas in MSG they accept a list of y/n

4
Documentation/x86/boot.txt
View File

@ -1013,7 +1013,7 @@ boot_params as that of 16-bit boot protocol, the boot loader should
also fill the additional fields of the struct boot_params as that
described in zero-page.txt.
After setupping the struct boot_params, the boot loader can load the
After setting up the struct boot_params, the boot loader can load the
32/64-bit kernel in the same way as that of 16-bit boot protocol.
In 32-bit boot protocol, the kernel is started by jumping to the
@ -1023,7 +1023,7 @@ In 32-bit boot protocol, the kernel is started by jumping to the
At entry, the CPU must be in 32-bit protected mode with paging
disabled; a GDT must be loaded with the descriptors for selectors
__BOOT_CS(0x10) and __BOOT_DS(0x18); both descriptors must be 4G flat
segment; __BOOS_CS must have execute/read permission, and __BOOT_DS
segment; __BOOT_CS must have execute/read permission, and __BOOT_DS
must have read/write permission; CS must be __BOOT_CS and DS, ES, SS
must be __BOOT_DS; interrupt must be disabled; %esi must hold the base
address of the struct boot_params; %ebp, %edi and %ebx must be zero.

284
Documentation/zh_CN/arm/kernel_user_helpers.txt Normal file
View File

@ -0,0 +1,284 @@
Chinese translated version of Documentation/arm/kernel_user_helpers.txt
If you have any comment or update to the content, please contact the
original document maintainer directly. However, if you have a problem
communicating in English you can also ask the Chinese maintainer for
help. Contact the Chinese maintainer if this translation is outdated
or if there is a problem with the translation.
Maintainer: Nicolas Pitre <nicolas.pitre@linaro.org>
Dave Martin <dave.martin@linaro.org>
Chinese maintainer: Fu Wei <tekkamanninja@gmail.com>
---------------------------------------------------------------------
Documentation/arm/kernel_user_helpers.txt 的中文翻译
如果想评论或更新本文的内容，请直接联系原文档的维护者。如果你使用英文
交流有困难的话，也可以向中文版维护者求助。如果本翻译更新不及时或者翻
译存在问题，请联系中文版维护者。
英文版维护者： Nicolas Pitre <nicolas.pitre@linaro.org>
Dave Martin <dave.martin@linaro.org>
中文版维护者： 傅炜 Fu Wei <tekkamanninja@gmail.com>
中文版翻译者： 傅炜 Fu Wei <tekkamanninja@gmail.com>
中文版校译者： 宋冬生 Dongsheng Song <dongshneg.song@gmail.com>
傅炜 Fu Wei <tekkamanninja@gmail.com>
以下为正文
---------------------------------------------------------------------
内核提供的用户空间辅助代码
=========================
在内核内存空间的固定地址处，有一个由内核提供并可从用户空间访问的代码
段。它用于向用户空间提供因在许多 ARM CPU 中未实现的特性和/或指令而需
内核提供帮助的某些操作。这些代码直接在用户模式下执行的想法是为了获得
最佳效率，但那些与内核计数器联系过于紧密的部分，则被留给了用户库实现。
事实上，此代码甚至可能因不同的 CPU 而异，这取决于其可用的指令集或它
是否为 SMP 系统。换句话说，内核保留在不作出警告的情况下根据需要更改
这些代码的权利。只有本文档描述的入口及其结果是保证稳定的。
这与完全成熟的 VDSO 实现不同（但两者并不冲突），尽管如此，VDSO 可阻止
某些通过常量高效跳转到那些代码段的汇编技巧。且由于那些代码段在返回用户
代码前仅使用少量的代码周期，则一个 VDSO 间接远程调用将会在这些简单的
操作上增加一个可测量的开销。
在对那些拥有原生支持的新型处理器进行代码优化时，仅在已为其他操作使用
了类似的新增指令，而导致二进制结果已与早期 ARM 处理器不兼容的情况下，
用户空间才应绕过这些辅助代码，并在内联函数中实现这些操作（无论是通过
编译器在代码中直接放置，还是作为库函数调用实现的一部分）。也就是说，
如果你编译的代码不会为了其他目的使用新指令，则不要仅为了避免使用这些
内核辅助代码，导致二进制程序无法在早期处理器上运行。
新的辅助代码可能随着时间的推移而增加，所以新内核中的某些辅助代码在旧
内核中可能不存在。因此，程序必须在对任何辅助代码调用假设是安全之前，
检测 __kuser_helper_version 的值（见下文）。理想情况下，这种检测应该
只在进程启动时执行一次；如果内核版本不支持所需辅助代码，则该进程可尽早
中止执行。
kuser_helper_version
--------------------
位置: 0xffff0ffc
参考声明:
extern int32_t __kuser_helper_version;
定义:
这个区域包含了当前运行内核实现的辅助代码版本号。用户空间可以通过读
取此版本号以确定特定的辅助代码是否存在。
使用范例:
#define __kuser_helper_version (*(int32_t *)0xffff0ffc)
void check_kuser_version(void)
{
if (__kuser_helper_version < 2) {
fprintf(stderr, "can't do atomic operations, kernel too old\n");
abort();
}
}
注意:
用户空间可以假设这个域的值不会在任何单个进程的生存期内改变。也就
是说，这个域可以仅在库的初始化阶段或进程启动阶段读取一次。
kuser_get_tls
-------------
位置: 0xffff0fe0
参考原型:
void * __kuser_get_tls(void);
输入:
lr = 返回地址
输出:
r0 = TLS 值
被篡改的寄存器:
无
定义:
获取之前通过 __ARM_NR_set_tls 系统调用设置的 TLS 值。
使用范例:
typedef void * (__kuser_get_tls_t)(void);
#define __kuser_get_tls (*(__kuser_get_tls_t *)0xffff0fe0)
void foo()
{
void *tls = __kuser_get_tls();
printf("TLS = %p\n", tls);
}
注意:
- 仅在 __kuser_helper_version >= 1 时，此辅助代码存在
（从内核版本 2.6.12 开始）。
kuser_cmpxchg
-------------
位置: 0xffff0fc0
参考原型:
int __kuser_cmpxchg(int32_t oldval, int32_t newval, volatile int32_t *ptr);
输入:
r0 = oldval
r1 = newval
r2 = ptr
lr = 返回地址
输出:
r0 = 成功代码 (零或非零)
C flag = 如果 r0 == 0 则置 1，如果 r0 != 0 则清零。
被篡改的寄存器:
r3, ip, flags
定义:
仅在 *ptr 为 oldval 时原子保存 newval 于 *ptr 中。
如果 *ptr 被改变，则返回值为零，否则为非零值。
如果 *ptr 被改变，则 C flag 也会被置 1，以实现调用代码中的汇编
优化。
使用范例:
typedef int (__kuser_cmpxchg_t)(int oldval, int newval, volatile int *ptr);
#define __kuser_cmpxchg (*(__kuser_cmpxchg_t *)0xffff0fc0)
int atomic_add(volatile int *ptr, int val)
{
int old, new;
do {
old = *ptr;
new = old + val;
} while(__kuser_cmpxchg(old, new, ptr));
return new;
}
注意:
- 这个例程已根据需要包含了内存屏障。
- 仅在 __kuser_helper_version >= 2 时，此辅助代码存在
（从内核版本 2.6.12 开始）。
kuser_memory_barrier
--------------------
位置: 0xffff0fa0
参考原型:
void __kuser_memory_barrier(void);
输入:
lr = 返回地址
输出:
无
被篡改的寄存器:
无
定义:
应用于任何需要内存屏障以防止手动数据修改带来的一致性问题，以及
__kuser_cmpxchg 中。
使用范例:
typedef void (__kuser_dmb_t)(void);
#define __kuser_dmb (*(__kuser_dmb_t *)0xffff0fa0)
注意:
- 仅在 __kuser_helper_version >= 3 时，此辅助代码存在
（从内核版本 2.6.15 开始）。
kuser_cmpxchg64
---------------
位置: 0xffff0f60
参考原型:
int __kuser_cmpxchg64(const int64_t *oldval,
const int64_t *newval,
volatile int64_t *ptr);
输入:
r0 = 指向 oldval
r1 = 指向 newval
r2 = 指向目标值
lr = 返回地址
输出:
r0 = 成功代码 (零或非零)
C flag = 如果 r0 == 0 则置 1，如果 r0 != 0 则清零。
被篡改的寄存器:
r3, lr, flags
定义:
仅在 *ptr 等于 *oldval 指向的 64 位值时，原子保存 *newval
指向的 64 位值于 *ptr 中。如果 *ptr 被改变，则返回值为零，
否则为非零值。
如果 *ptr 被改变，则 C flag 也会被置 1，以实现调用代码中的汇编
优化。
使用范例:
typedef int (__kuser_cmpxchg64_t)(const int64_t *oldval,
const int64_t *newval,
volatile int64_t *ptr);
#define __kuser_cmpxchg64 (*(__kuser_cmpxchg64_t *)0xffff0f60)
int64_t atomic_add64(volatile int64_t *ptr, int64_t val)
{
int64_t old, new;
do {
old = *ptr;
new = old + val;
} while(__kuser_cmpxchg64(&old, &new, ptr));
return new;
}
注意:
- 这个例程已根据需要包含了内存屏障。
- 由于这个过程的代码长度（此辅助代码跨越 2 个常规的 kuser “槽”），
因此 0xffff0f80 不被作为有效的入口点。
- 仅在 __kuser_helper_version >= 5 时，此辅助代码存在
（从内核版本 3.1 开始）。

16
Documentation/zh_CN/arm64/memory.txt
View File

@ -47,21 +47,21 @@ AArch64 Linux 内存布局：
-----------------------------------------------------------------------
0000000000000000 0000007fffffffff 512GB 用户空间
ffffff8000000000 ffffffbbfffcffff ~240GB vmalloc
ffffff8000000000 ffffffbbfffeffff ~240GB vmalloc
ffffffbbfffd0000 ffffffbcfffdffff 64KB [防护页]
ffffffbbfffe0000 ffffffbcfffeffff 64KB PCI I/O 空间
ffffffbbffff0000 ffffffbcffffffff 64KB [防护页]
ffffffbbffff0000 ffffffbbffffffff 64KB [防护页]
ffffffbc00000000 ffffffbdffffffff 8GB vmemmap
ffffffbe00000000 ffffffbffbffffff ~8GB [防护页，未来用于 vmmemap]
ffffffbe00000000 ffffffbffbbfffff ~8GB [防护页，未来用于 vmmemap]
ffffffbffbe00000 ffffffbffbe0ffff 64KB PCI I/O 空间
ffffffbbffff0000 ffffffbcffffffff ~2MB [防护页]
ffffffbffc000000 ffffffbfffffffff 64MB 模块
ffffffc000000000 ffffffffffffffff 256GB 内存空间
ffffffc000000000 ffffffffffffffff 256GB 内核逻辑内存映射
4KB 页大小的转换表查找：

129
MAINTAINERS
View File

@ -526,17 +526,17 @@ F: drivers/video/geode/
F: arch/x86/include/asm/geode.h
AMD IOMMU (AMD-VI)
M: Joerg Roedel <joerg.roedel@amd.com>
M: Joerg Roedel <joro@8bytes.org>
L: iommu@lists.linux-foundation.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git
S: Supported
S: Maintained
F: drivers/iommu/amd_iommu*.[ch]
F: include/linux/amd-iommu.h
AMD MICROCODE UPDATE SUPPORT
M: Andreas Herrmann <andreas.herrmann3@amd.com>
M: Andreas Herrmann <herrmann.der.user@googlemail.com>
L: amd64-microcode@amd64.org
S: Supported
S: Maintained
F: arch/x86/kernel/microcode_amd.c
AMS (Apple Motion Sensor) DRIVER
@ -841,6 +841,14 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/kristoffer/linux-hpc.git
F: arch/arm/mach-sa1100/jornada720.c
F: arch/arm/mach-sa1100/include/mach/jornada720.h
ARM/IGEP MACHINE SUPPORT
M: Enric Balletbo i Serra <eballetbo@gmail.com>
M: Javier Martinez Canillas <javier@dowhile0.org>
L: linux-omap@vger.kernel.org
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
F: arch/arm/mach-omap2/board-igep0020.c
ARM/INCOME PXA270 SUPPORT
M: Marek Vasut <marek.vasut@gmail.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
@ -1229,6 +1237,7 @@ F: drivers/video/wm8505fb*
F: drivers/video/wmt_ge_rops.*
F: drivers/tty/serial/vt8500_serial.c
F: drivers/rtc/rtc-vt8500-c
F: drivers/mmc/host/wmt-sdmmc.c
ARM/ZIPIT Z2 SUPPORT
M: Marek Vasut <marek.vasut@gmail.com>
@ -1360,14 +1369,6 @@ S: Maintained
F: drivers/atm/
F: include/linux/atm*
ATMEL AT91 MCI DRIVER
M: Ludovic Desroches <ludovic.desroches@atmel.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
W: http://www.atmel.com/products/AT91/
W: http://www.at91.com/
S: Maintained
F: drivers/mmc/host/at91_mci.c
ATMEL AT91 / AT32 MCI DRIVER
M: Ludovic Desroches <ludovic.desroches@atmel.com>
S: Maintained
@ -1986,7 +1987,6 @@ F: fs/coda/
F: include/linux/coda*.h
COMMON CLK FRAMEWORK
M: Mike Turquette <mturquette@ti.com>
M: Mike Turquette <mturquette@linaro.org>
L: linux-arm-kernel@lists.infradead.org (same as CLK API & CLKDEV)
T: git git://git.linaro.org/people/mturquette/linux.git
@ -2708,10 +2708,10 @@ F: include/linux/edac.h
EDAC-AMD64
M: Doug Thompson <dougthompson@xmission.com>
M: Borislav Petkov <borislav.petkov@amd.com>
M: Borislav Petkov <bp@alien8.de>
L: linux-edac@vger.kernel.org
W: bluesmoke.sourceforge.net
S: Supported
S: Maintained
F: drivers/edac/amd64_edac*
EDAC-E752X
@ -3596,7 +3596,49 @@ S: Maintained
F: drivers/hv/
F: drivers/hid/hid-hyperv.c
F: drivers/net/hyperv/
F: drivers/staging/hv/
I2C OVER PARALLEL PORT
M: Jean Delvare <khali@linux-fr.org>
L: linux-i2c@vger.kernel.org
S: Maintained
F: Documentation/i2c/busses/i2c-parport
F: Documentation/i2c/busses/i2c-parport-light
F: drivers/i2c/busses/i2c-parport.c
F: drivers/i2c/busses/i2c-parport-light.c
I2C/SMBUS CONTROLLER DRIVERS FOR PC
M: Jean Delvare <khali@linux-fr.org>
L: linux-i2c@vger.kernel.org
S: Maintained
F: Documentation/i2c/busses/i2c-ali1535
F: Documentation/i2c/busses/i2c-ali1563
F: Documentation/i2c/busses/i2c-ali15x3
F: Documentation/i2c/busses/i2c-amd756
F: Documentation/i2c/busses/i2c-amd8111
F: Documentation/i2c/busses/i2c-i801
F: Documentation/i2c/busses/i2c-nforce2
F: Documentation/i2c/busses/i2c-piix4
F: Documentation/i2c/busses/i2c-sis5595
F: Documentation/i2c/busses/i2c-sis630
F: Documentation/i2c/busses/i2c-sis96x
F: Documentation/i2c/busses/i2c-via
F: Documentation/i2c/busses/i2c-viapro
F: drivers/i2c/busses/i2c-ali1535.c
F: drivers/i2c/busses/i2c-ali1563.c
F: drivers/i2c/busses/i2c-ali15x3.c
F: drivers/i2c/busses/i2c-amd756.c
F: drivers/i2c/busses/i2c-amd756-s4882.c
F: drivers/i2c/busses/i2c-amd8111.c
F: drivers/i2c/busses/i2c-i801.c
F: drivers/i2c/busses/i2c-isch.c
F: drivers/i2c/busses/i2c-nforce2.c
F: drivers/i2c/busses/i2c-nforce2-s4985.c
F: drivers/i2c/busses/i2c-piix4.c
F: drivers/i2c/busses/i2c-sis5595.c
F: drivers/i2c/busses/i2c-sis630.c
F: drivers/i2c/busses/i2c-sis96x.c
F: drivers/i2c/busses/i2c-via.c
F: drivers/i2c/busses/i2c-viapro.c
I2C/SMBUS STUB DRIVER
M: "Mark M. Hoffman" <mhoffman@lightlink.com>
@ -3605,9 +3647,8 @@ S: Maintained
F: drivers/i2c/busses/i2c-stub.c
I2C SUBSYSTEM
M: "Jean Delvare (PC drivers, core)" <khali@linux-fr.org>
M: Wolfram Sang <w.sang@pengutronix.de>
M: "Ben Dooks (embedded platforms)" <ben-linux@fluff.org>
M: "Wolfram Sang (embedded platforms)" <w.sang@pengutronix.de>
L: linux-i2c@vger.kernel.org
W: http://i2c.wiki.kernel.org/
T: quilt kernel.org/pub/linux/kernel/people/jdelvare/linux-2.6/jdelvare-i2c/
@ -3618,6 +3659,13 @@ F: drivers/i2c/
F: include/linux/i2c.h
F: include/linux/i2c-*.h
I2C-TAOS-EVM DRIVER
M: Jean Delvare <khali@linux-fr.org>
L: linux-i2c@vger.kernel.org
S: Maintained
F: Documentation/i2c/busses/i2c-taos-evm
F: drivers/i2c/busses/i2c-taos-evm.c
I2C-TINY-USB DRIVER
M: Till Harbaum <till@harbaum.org>
L: linux-i2c@vger.kernel.org
@ -3704,7 +3752,7 @@ S: Maintained
F: drivers/platform/x86/ideapad-laptop.c
IDE/ATAPI DRIVERS
M: Borislav Petkov <petkovbb@gmail.com>
M: Borislav Petkov <bp@alien8.de>
L: linux-ide@vger.kernel.org
S: Maintained
F: Documentation/cdrom/ide-cd
@ -3740,6 +3788,15 @@ M: Stanislaw Gruszka <stf_xl@wp.pl>
S: Maintained
F: drivers/usb/atm/ueagle-atm.c
INDUSTRY PACK SUBSYSTEM (IPACK)
M: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
M: Jens Taprogge <jens.taprogge@taprogge.org>
M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
L: industrypack-devel@lists.sourceforge.net
W: http://industrypack.sourceforge.net
S: Maintained
F: drivers/ipack/
INTEGRITY MEASUREMENT ARCHITECTURE (IMA)
M: Mimi Zohar <zohar@us.ibm.com>
S: Supported
@ -4231,8 +4288,8 @@ F: include/linux/lockd/
F: include/linux/sunrpc/
KERNEL VIRTUAL MACHINE (KVM)
M: Avi Kivity <avi@redhat.com>
M: Marcelo Tosatti <mtosatti@redhat.com>
M: Gleb Natapov <gleb@redhat.com>
L: kvm@vger.kernel.org
W: http://kvm.qumranet.com
S: Supported
@ -5364,7 +5421,7 @@ S: Maintained
F: sound/drivers/opl4/
OPROFILE
M: Robert Richter <robert.richter@amd.com>
M: Robert Richter <rric@kernel.org>
L: oprofile-list@lists.sf.net
S: Maintained
F: arch/*/include/asm/oprofile*.h
@ -5639,6 +5696,12 @@ S: Maintained
F: drivers/pinctrl/
F: include/linux/pinctrl/
PIN CONTROLLER - ATMEL AT91
M: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
S: Maintained
F: drivers/pinctrl/pinctrl-at91.c
PIN CONTROLLER - ST SPEAR
M: Viresh Kumar <viresh.linux@gmail.com>
L: spear-devel@list.st.com
@ -7210,6 +7273,14 @@ L: linux-xtensa@linux-xtensa.org
S: Maintained
F: arch/xtensa/
THERMAL
M: Zhang Rui <rui.zhang@intel.com>
L: linux-pm@vger.kernel.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux.git
S: Supported
F: drivers/thermal/
F: include/linux/thermal.h
THINKPAD ACPI EXTRAS DRIVER
M: Henrique de Moraes Holschuh <ibm-acpi@hmh.eng.br>
L: ibm-acpi-devel@lists.sourceforge.net
@ -7359,6 +7430,7 @@ K: ^Subject:.*(?i)trivial
TTY LAYER
M: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
M: Jiri Slaby <jslaby@suse.cz>
S: Supported
T: git git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git
F: drivers/tty/
@ -7515,12 +7587,6 @@ L: linux-scsi@vger.kernel.org
S: Supported
F: drivers/usb/storage/uas.c
USB BLOCK DRIVER (UB ub)
M: Pete Zaitcev <zaitcev@redhat.com>
L: linux-usb@vger.kernel.org
S: Supported
F: drivers/block/ub.c
USB CDC ETHERNET DRIVER
M: Oliver Neukum <oliver@neukum.org>
L: linux-usb@vger.kernel.org
@ -7887,13 +7953,6 @@ M: Roger Luethi <rl@hellgate.ch>
S: Maintained
F: drivers/net/ethernet/via/via-rhine.c
VIAPRO SMBUS DRIVER
M: Jean Delvare <khali@linux-fr.org>
L: linux-i2c@vger.kernel.org
S: Maintained
F: Documentation/i2c/busses/i2c-viapro
F: drivers/i2c/busses/i2c-viapro.c
VIA SD/MMC CARD CONTROLLER DRIVER
M: Bruce Chang <brucechang@via.com.tw>
M: Harald Welte <HaraldWelte@viatech.com>
@ -8148,7 +8207,7 @@ F: drivers/platform/x86
X86 MCE INFRASTRUCTURE
M: Tony Luck <tony.luck@intel.com>
M: Borislav Petkov <bp@amd64.org>
M: Borislav Petkov <bp@alien8.de>
L: linux-edac@vger.kernel.org
S: Maintained
F: arch/x86/kernel/cpu/mcheck/*

8
Makefile
View File

@ -1,7 +1,7 @@
VERSION = 3
PATCHLEVEL = 7
SUBLEVEL = 0
EXTRAVERSION = -rc5
EXTRAVERSION =
NAME = Terrified Chipmunk
# *DOCUMENTATION*
@ -1321,10 +1321,12 @@ kernelversion:
# Clear a bunch of variables before executing the submake
tools/: FORCE
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS= -C $(src)/tools/
$(Q)mkdir -p $(objtree)/tools
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/
tools/%: FORCE
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS= -C $(src)/tools/ $*
$(Q)mkdir -p $(objtree)/tools
$(Q)$(MAKE) LDFLAGS= MAKEFLAGS= O=$(objtree) subdir=tools -C $(src)/tools/ $*
# Single targets
# ---------------------------------------------------------------------------

15
arch/Kconfig
View File

@ -300,15 +300,16 @@ config SECCOMP_FILTER
See Documentation/prctl/seccomp_filter.txt for details.
config HAVE_RCU_USER_QS
config HAVE_CONTEXT_TRACKING
bool
help
Provide kernel entry/exit hooks necessary for userspace
RCU extended quiescent state. Syscalls need to be wrapped inside
rcu_user_exit()-rcu_user_enter() through the slow path using
TIF_NOHZ flag. Exceptions handlers must be wrapped as well. Irqs
are already protected inside rcu_irq_enter/rcu_irq_exit() but
preemption or signal handling on irq exit still need to be protected.
Provide kernel/user boundaries probes necessary for subsystems
that need it, such as userspace RCU extended quiescent state.
Syscalls need to be wrapped inside user_exit()-user_enter() through
the slow path using TIF_NOHZ flag. Exceptions handlers must be
wrapped as well. Irqs are already protected inside
rcu_irq_enter/rcu_irq_exit() but preemption or signal handling on
irq exit still need to be protected.
config HAVE_VIRT_CPU_ACCOUNTING
bool

1
arch/alpha/include/asm/Kbuild
View File

@ -11,3 +11,4 @@ header-y += reg.h
header-y += regdef.h
header-y += sysinfo.h
generic-y += exec.h
generic-y += trace_clock.h

3
arch/alpha/include/asm/ioctls.h
View File

@ -95,6 +95,9 @@
#define TIOCGDEV _IOR('T',0x32, unsigned int) /* Get primary device node of /dev/console */
#define TIOCSIG _IOW('T',0x36, int) /* Generate signal on Pty slave */
#define TIOCVHANGUP 0x5437
#define TIOCGPKT _IOR('T', 0x38, int) /* Get packet mode state */
#define TIOCGPTLCK _IOR('T', 0x39, int) /* Get Pty lock state */
#define TIOCGEXCL _IOR('T', 0x40, int) /* Get exclusive mode state */
#define TIOCSERCONFIG 0x5453
#define TIOCSERGWILD 0x5454

11
arch/alpha/include/asm/mman.h
View File

@ -63,4 +63,15 @@
/* compatibility flags */
#define MAP_FILE 0
/*
* When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size.
* This gives us 6 bits, which is enough until someone invents 128 bit address
* spaces.
*
* Assume these are all power of twos.
* When 0 use the default page size.
*/
#define MAP_HUGE_SHIFT 26
#define MAP_HUGE_MASK 0x3f
#endif /* __ALPHA_MMAN_H__ */

6
arch/alpha/kernel/osf_sys.c
View File

@ -445,7 +445,7 @@ struct procfs_args {
* unhappy with OSF UFS. [CHECKME]
*/
static int
osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
osf_ufs_mount(const char *dirname, struct ufs_args __user *args, int flags)
{
int retval;
struct cdfs_args tmp;
@ -465,7 +465,7 @@ osf_ufs_mount(char *dirname, struct ufs_args __user *args, int flags)
}
static int
osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
osf_cdfs_mount(const char *dirname, struct cdfs_args __user *args, int flags)
{
int retval;
struct cdfs_args tmp;
@ -485,7 +485,7 @@ osf_cdfs_mount(char *dirname, struct cdfs_args __user *args, int flags)
}
static int
osf_procfs_mount(char *dirname, struct procfs_args __user *args, int flags)
osf_procfs_mount(const char *dirname, struct procfs_args __user *args, int flags)
{
struct procfs_args tmp;

5
arch/alpha/kernel/srmcons.c
View File

@ -205,7 +205,6 @@ static const struct tty_operations srmcons_ops = {
static int __init
srmcons_init(void)
{
tty_port_init(&srmcons_singleton.port);
setup_timer(&srmcons_singleton.timer, srmcons_receive_chars,
(unsigned long)&srmcons_singleton);
if (srm_is_registered_console) {
@ -215,6 +214,9 @@ srmcons_init(void)
driver = alloc_tty_driver(MAX_SRM_CONSOLE_DEVICES);
if (!driver)
return -ENOMEM;
tty_port_init(&srmcons_singleton.port);
driver->driver_name = "srm";
driver->name = "srm";
driver->major = 0; /* dynamic */
@ -227,6 +229,7 @@ srmcons_init(void)
err = tty_register_driver(driver);
if (err) {
put_tty_driver(driver);
tty_port_destroy(&srmcons_singleton.port);
return err;
}
srmcons_driver = driver;

6
arch/arm/Kconfig
View File

@ -330,6 +330,8 @@ config ARCH_AT91
select IRQ_DOMAIN
select NEED_MACH_GPIO_H
select NEED_MACH_IO_H if PCCARD
select PINCTRL
select PINCTRL_AT91 if USE_OF
help
This enables support for systems based on Atmel
AT91RM9200 and AT91SAM9* processors.
@ -364,6 +366,7 @@ config ARCH_CNS3XXX
config ARCH_CLPS711X
bool "Cirrus Logic CLPS711x/EP721x/EP731x-based"
select ARCH_REQUIRE_GPIOLIB
select ARCH_USES_GETTIMEOFFSET
select CLKDEV_LOOKUP
select COMMON_CLK
@ -547,6 +550,7 @@ config ARCH_KIRKWOOD
select CPU_FEROCEON
select GENERIC_CLOCKEVENTS
select PCI
select PCI_QUIRKS
select PLAT_ORION_LEGACY
help
Support for the following Marvell Kirkwood series SoCs:
@ -586,6 +590,7 @@ config ARCH_MMP
select GPIO_PXA
select IRQ_DOMAIN
select NEED_MACH_GPIO_H
select PINCTRL
select PLAT_PXA
select SPARSE_IRQ
help
@ -904,6 +909,7 @@ config ARCH_NOMADIK
config PLAT_SPEAR
bool "ST SPEAr"
select ARCH_HAS_CPUFREQ
select ARCH_REQUIRE_GPIOLIB
select ARM_AMBA
select CLKDEV_LOOKUP

4
arch/arm/Makefile
View File

@ -292,10 +292,10 @@ zinstall uinstall install: vmlinux
$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $@
%.dtb: scripts
$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
$(Q)$(MAKE) $(build)=$(boot)/dts MACHINE=$(MACHINE) $(boot)/dts/$@
dtbs: scripts
$(Q)$(MAKE) $(build)=$(boot) MACHINE=$(MACHINE) $(boot)/$@
$(Q)$(MAKE) $(build)=$(boot)/dts MACHINE=$(MACHINE) dtbs
# We use MRPROPER_FILES and CLEAN_FILES now
archclean:

22
arch/arm/boot/Makefile
View File

@ -15,8 +15,6 @@ ifneq ($(MACHINE),)
include $(srctree)/$(MACHINE)/Makefile.boot
endif
include $(srctree)/arch/arm/boot/dts/Makefile
# Note: the following conditions must always be true:
# ZRELADDR == virt_to_phys(PAGE_OFFSET + TEXT_OFFSET)
# PARAMS_PHYS must be within 4MB of ZRELADDR
@ -33,7 +31,7 @@ ifeq ($(CONFIG_XIP_KERNEL),y)
$(obj)/xipImage: vmlinux FORCE
$(call if_changed,objcopy)
$(kecho) ' Kernel: $@ is ready (physical address: $(CONFIG_XIP_PHYS_ADDR))'
@$(kecho) ' Kernel: $@ is ready (physical address: $(CONFIG_XIP_PHYS_ADDR))'
$(obj)/Image $(obj)/zImage: FORCE
@echo 'Kernel configured for XIP (CONFIG_XIP_KERNEL=y)'
@ -48,27 +46,17 @@ $(obj)/xipImage: FORCE
$(obj)/Image: vmlinux FORCE
$(call if_changed,objcopy)
$(kecho) ' Kernel: $@ is ready'
@$(kecho) ' Kernel: $@ is ready'
$(obj)/compressed/vmlinux: $(obj)/Image FORCE
$(Q)$(MAKE) $(build)=$(obj)/compressed $@
$(obj)/zImage: $(obj)/compressed/vmlinux FORCE
$(call if_changed,objcopy)
$(kecho) ' Kernel: $@ is ready'
@$(kecho) ' Kernel: $@ is ready'
endif
targets += $(dtb-y)
# Rule to build device tree blobs
$(obj)/%.dtb: $(src)/dts/%.dts FORCE
$(call if_changed_dep,dtc)
$(obj)/dtbs: $(addprefix $(obj)/, $(dtb-y))
clean-files := *.dtb
ifneq ($(LOADADDR),)
UIMAGE_LOADADDR=$(LOADADDR)
else
@ -90,7 +78,7 @@ fi
$(obj)/uImage: $(obj)/zImage FORCE
@$(check_for_multiple_loadaddr)
$(call if_changed,uimage)
$(kecho) ' Image $@ is ready'
@$(kecho) ' Image $@ is ready'
$(obj)/bootp/bootp: $(obj)/zImage initrd FORCE
$(Q)$(MAKE) $(build)=$(obj)/bootp $@
@ -98,7 +86,7 @@ $(obj)/bootp/bootp: $(obj)/zImage initrd FORCE
$(obj)/bootpImage: $(obj)/bootp/bootp FORCE
$(call if_changed,objcopy)
$(kecho) ' Kernel: $@ is ready'
@$(kecho) ' Kernel: $@ is ready'
PHONY += initrd FORCE
initrd:

14
arch/arm/boot/compressed/head.S
View File

@ -652,6 +652,15 @@ __setup_mmu: sub r3, r4, #16384 @ Page directory size
mov pc, lr
ENDPROC(__setup_mmu)
@ Enable unaligned access on v6, to allow better code generation
@ for the decompressor C code:
__armv6_mmu_cache_on:
mrc p15, 0, r0, c1, c0, 0 @ read SCTLR
bic r0, r0, #2 @ A (no unaligned access fault)
orr r0, r0, #1 << 22 @ U (v6 unaligned access model)
mcr p15, 0, r0, c1, c0, 0 @ write SCTLR
b __armv4_mmu_cache_on
__arm926ejs_mmu_cache_on:
#ifdef CONFIG_CPU_DCACHE_WRITETHROUGH
mov r0, #4 @ put dcache in WT mode
@ -694,6 +703,9 @@ __armv7_mmu_cache_on:
bic r0, r0, #1 << 28 @ clear SCTLR.TRE
orr r0, r0, #0x5000 @ I-cache enable, RR cache replacement
orr r0, r0, #0x003c @ write buffer
bic r0, r0, #2 @ A (no unaligned access fault)
orr r0, r0, #1 << 22 @ U (v6 unaligned access model)
@ (needed for ARM1176)
#ifdef CONFIG_MMU
#ifdef CONFIG_CPU_ENDIAN_BE8
orr r0, r0, #1 << 25 @ big-endian page tables
@ -914,7 +926,7 @@ proc_types:
.word 0x0007b000 @ ARMv6
.word 0x000ff000
W(b) __armv4_mmu_cache_on
W(b) __armv6_mmu_cache_on
W(b) __armv4_mmu_cache_off
W(b) __armv6_mmu_cache_flush

56
arch/arm/boot/dts/Makefile
View File

@ -1,21 +1,37 @@
ifeq ($(CONFIG_OF),y)
dtb-$(CONFIG_ARCH_AT91) += aks-cdu.dtb \
at91sam9263ek.dtb \
at91sam9g20ek_2mmc.dtb \
at91sam9g20ek.dtb \
at91sam9g25ek.dtb \
at91sam9m10g45ek.dtb \
at91sam9n12ek.dtb \
ethernut5.dtb \
evk-pro3.dtb \
kizbox.dtb \
tny_a9260.dtb \
tny_a9263.dtb \
tny_a9g20.dtb \
usb_a9260.dtb \
usb_a9263.dtb \
usb_a9g20.dtb
# Keep at91 dtb files sorted alphabetically for each SoC
# rm9200
dtb-$(CONFIG_ARCH_AT91) += at91rm9200ek.dtb
# sam9260
dtb-$(CONFIG_ARCH_AT91) += animeo_ip.dtb
dtb-$(CONFIG_ARCH_AT91) += aks-cdu.dtb
dtb-$(CONFIG_ARCH_AT91) += ethernut5.dtb
dtb-$(CONFIG_ARCH_AT91) += evk-pro3.dtb
dtb-$(CONFIG_ARCH_AT91) += tny_a9260.dtb
dtb-$(CONFIG_ARCH_AT91) += usb_a9260.dtb
# sam9263
dtb-$(CONFIG_ARCH_AT91) += at91sam9263ek.dtb
dtb-$(CONFIG_ARCH_AT91) += tny_a9263.dtb
dtb-$(CONFIG_ARCH_AT91) += usb_a9263.dtb
# sam9g20
dtb-$(CONFIG_ARCH_AT91) += at91sam9g20ek.dtb
dtb-$(CONFIG_ARCH_AT91) += at91sam9g20ek_2mmc.dtb
dtb-$(CONFIG_ARCH_AT91) += kizbox.dtb
dtb-$(CONFIG_ARCH_AT91) += tny_a9g20.dtb
dtb-$(CONFIG_ARCH_AT91) += usb_a9g20.dtb
# sam9g45
dtb-$(CONFIG_ARCH_AT91) += at91sam9m10g45ek.dtb
dtb-$(CONFIG_ARCH_AT91) += pm9g45.dtb
# sam9n12
dtb-$(CONFIG_ARCH_AT91) += at91sam9n12ek.dtb
# sam9x5
dtb-$(CONFIG_ARCH_AT91) += at91sam9g15ek.dtb
dtb-$(CONFIG_ARCH_AT91) += at91sam9g25ek.dtb
dtb-$(CONFIG_ARCH_AT91) += at91sam9g35ek.dtb
dtb-$(CONFIG_ARCH_AT91) += at91sam9x25ek.dtb
dtb-$(CONFIG_ARCH_AT91) += at91sam9x35ek.dtb
dtb-$(CONFIG_ARCH_BCM2835) += bcm2835-rpi-b.dtb
dtb-$(CONFIG_ARCH_DOVE) += dove-cm-a510.dtb \
dove-cubox.dtb \
@ -104,4 +120,12 @@ dtb-$(CONFIG_ARCH_VT8500) += vt8500-bv07.dtb \
wm8505-ref.dtb \
wm8650-mid.dtb
targets += dtbs
endif
# *.dtb used to be generated in the directory above. Clean out the
# old build results so people don't accidentally use them.
dtbs: $(addprefix $(obj)/, $(dtb-y))
$(Q)rm -f $(obj)/../*.dtb
clean-files := *.dtb

178
arch/arm/boot/dts/animeo_ip.dts Normal file
View File

@ -0,0 +1,178 @@
/*
* animeo_ip.dts - Device Tree file for Somfy Animeo IP Boards
*
* Copyright (C) 2011-2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
*
* Licensed under GPLv2 only.
*/
/dts-v1/;
/include/ "at91sam9260.dtsi"
/ {
model = "Somfy Animeo IP";
compatible = "somfy,animeo-ip", "atmel,at91sam9260", "atmel,at91sam9";
aliases {
serial0 = &usart1;
serial1 = &usart2;
serial2 = &usart0;
serial3 = &dbgu;
serial4 = &usart3;
serial5 = &uart0;
serial6 = &uart1;
};
chosen {
linux,stdout-path = &usart2;
};
memory {
reg = <0x20000000 0x4000000>;
};
clocks {
#address-cells = <1>;
#size-cells = <1>;
ranges;
main_clock: clock@0 {
compatible = "atmel,osc", "fixed-clock";
clock-frequency = <18432000>;
};
};
ahb {
apb {
usart0: serial@fffb0000 {
pinctrl-0 = <&pinctrl_usart0 &pinctrl_usart0_rts>;
linux,rs485-enabled-at-boot-time;
status = "okay";
};
usart1: serial@fffb4000 {
pinctrl-0 = <&pinctrl_usart1 &pinctrl_usart1_rts>;
linux,rs485-enabled-at-boot-time;
status = "okay";
};
usart2: serial@fffb8000 {
pinctrl-0 = <&pinctrl_usart2>;
status = "okay";
};
macb0: ethernet@fffc4000 {
pinctrl-0 = <&pinctrl_macb_rmii &pinctrl_macb_rmii_mii>;
phy-mode = "mii";
status = "okay";
};
mmc0: mmc@fffa8000 {
pinctrl-0 = <&pinctrl_mmc0_clk
&pinctrl_mmc0_slot1_cmd_dat0
&pinctrl_mmc0_slot1_dat1_3>;
status = "okay";
slot@1 {
reg = <1>;
bus-width = <4>;
};
};
};
nand0: nand@40000000 {
nand-bus-width = <8>;
nand-ecc-mode = "soft";
nand-on-flash-bbt;
status = "okay";
at91bootstrap@0 {
label = "at91bootstrap";
reg = <0x0 0x8000>;
};
barebox@8000 {
label = "barebox";
reg = <0x8000 0x40000>;
};
bareboxenv@48000 {
label = "bareboxenv";
reg = <0x48000 0x8000>;
};
user_block@0x50000 {
label = "user_block";
reg = <0x50000 0xb0000>;
};
kernel@100000 {
label = "kernel";
reg = <0x100000 0x1b0000>;
};
root@2b0000 {
label = "root";
reg = <0x2b0000 0x1D50000>;
};
};
usb0: ohci@00500000 {
num-ports = <2>;
atmel,vbus-gpio = <&pioB 15 1>;
status = "okay";
};
};
leds {
compatible = "gpio-leds";
power_green {
label = "power_green";
gpios = <&pioC 17 0>;
linux,default-trigger = "heartbeat";
};
power_red {
label = "power_red";
gpios = <&pioA 2 0>;
};
tx_green {
label = "tx_green";
gpios = <&pioC 19 0>;
};
tx_red {
label = "tx_red";
gpios = <&pioC 18 0>;
};
};
gpio_keys {
compatible = "gpio-keys";
#address-cells = <1>;
#size-cells = <0>;
keyswitch_in {
label = "keyswitch_in";
gpios = <&pioB 1 0>;
linux,code = <28>;
gpio-key,wakeup;
};
error_in {
label = "error_in";
gpios = <&pioB 2 0>;
linux,code = <29>;
gpio-key,wakeup;
};
btn {
label = "btn";
gpios = <&pioC 23 0>;
linux,code = <31>;
gpio-key,wakeup;
};
};
};

349
arch/arm/boot/dts/at91rm9200.dtsi Normal file
View File

@ -0,0 +1,349 @@
/*
* at91rm9200.dtsi - Device Tree Include file for AT91RM9200 family SoC
*
* Copyright (C) 2011 Atmel,
* 2011 Nicolas Ferre <nicolas.ferre@atmel.com>,
* 2012 Joachim Eastwood <manabian@gmail.com>
*
* Based on at91sam9260.dtsi
*
* Licensed under GPLv2 or later.
*/
/include/ "skeleton.dtsi"
/ {
model = "Atmel AT91RM9200 family SoC";
compatible = "atmel,at91rm9200";
interrupt-parent = <&aic>;
aliases {
serial0 = &dbgu;
serial1 = &usart0;
serial2 = &usart1;
serial3 = &usart2;
serial4 = &usart3;
gpio0 = &pioA;
gpio1 = &pioB;
gpio2 = &pioC;
gpio3 = &pioD;
tcb0 = &tcb0;
tcb1 = &tcb1;
};
cpus {
cpu@0 {
compatible = "arm,arm920t";
};
};
memory {
reg = <0x20000000 0x04000000>;
};
ahb {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges;
apb {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges;
aic: interrupt-controller@fffff000 {
#interrupt-cells = <3>;
compatible = "atmel,at91rm9200-aic";
interrupt-controller;
reg = <0xfffff000 0x200>;
atmel,external-irqs = <25 26 27 28 29 30 31>;
};
ramc0: ramc@ffffff00 {
compatible = "atmel,at91rm9200-sdramc";
reg = <0xffffff00 0x100>;
};
pmc: pmc@fffffc00 {
compatible = "atmel,at91rm9200-pmc";
reg = <0xfffffc00 0x100>;
};
st: timer@fffffd00 {
compatible = "atmel,at91rm9200-st";
reg = <0xfffffd00 0x100>;
interrupts = <1 4 7>;
};
tcb0: timer@fffa0000 {
compatible = "atmel,at91rm9200-tcb";
reg = <0xfffa0000 0x100>;
interrupts = <17 4 0 18 4 0 19 4 0>;
};
tcb1: timer@fffa4000 {
compatible = "atmel,at91rm9200-tcb";
reg = <0xfffa4000 0x100>;
interrupts = <20 4 0 21 4 0 22 4 0>;
};
pinctrl@fffff400 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "atmel,at91rm9200-pinctrl", "simple-bus";
ranges = <0xfffff400 0xfffff400 0x800>;
atmel,mux-mask = <
/* A B */
0xffffffff 0xffffffff /* pioA */
0xffffffff 0x083fffff /* pioB */
0xffff3fff 0x00000000 /* pioC */
0x03ff87ff 0x0fffff80 /* pioD */
>;
/* shared pinctrl settings */
dbgu {
pinctrl_dbgu: dbgu-0 {
atmel,pins =
<0 30 0x1 0x0 /* PA30 periph A */
0 31 0x1 0x1>; /* PA31 periph with pullup */
};
};
uart0 {
pinctrl_uart0: uart0-0 {
atmel,pins =
<0 17 0x1 0x0 /* PA17 periph A */
0 18 0x1 0x0>; /* PA18 periph A */
};
pinctrl_uart0_rts: uart0_rts-0 {
atmel,pins =
<0 20 0x1 0x0>; /* PA20 periph A */
};
pinctrl_uart0_cts: uart0_cts-0 {
atmel,pins =
<0 21 0x1 0x0>; /* PA21 periph A */
};
};
uart1 {
pinctrl_uart1: uart1-0 {
atmel,pins =
<1 20 0x1 0x1 /* PB20 periph A with pullup */
1 21 0x1 0x0>; /* PB21 periph A */
};
pinctrl_uart1_rts: uart1_rts-0 {
atmel,pins =
<1 24 0x1 0x0>; /* PB24 periph A */
};
pinctrl_uart1_cts: uart1_cts-0 {
atmel,pins =
<1 26 0x1 0x0>; /* PB26 periph A */
};
pinctrl_uart1_dtr_dsr: uart1_dtr_dsr-0 {
atmel,pins =
<1 19 0x1 0x0 /* PB19 periph A */
1 25 0x1 0x0>; /* PB25 periph A */
};
pinctrl_uart1_dcd: uart1_dcd-0 {
atmel,pins =
<1 23 0x1 0x0>; /* PB23 periph A */
};
pinctrl_uart1_ri: uart1_ri-0 {
atmel,pins =
<1 18 0x1 0x0>; /* PB18 periph A */
};
};
uart2 {
pinctrl_uart2: uart2-0 {
atmel,pins =
<0 22 0x1 0x0 /* PA22 periph A */
0 23 0x1 0x1>; /* PA23 periph A with pullup */
};
pinctrl_uart2_rts: uart2_rts-0 {
atmel,pins =
<0 30 0x2 0x0>; /* PA30 periph B */
};
pinctrl_uart2_cts: uart2_cts-0 {
atmel,pins =
<0 31 0x2 0x0>; /* PA31 periph B */
};
};
uart3 {
pinctrl_uart3: uart3-0 {
atmel,pins =
<0 5 0x2 0x1 /* PA5 periph B with pullup */
0 6 0x2 0x0>; /* PA6 periph B */
};
pinctrl_uart3_rts: uart3_rts-0 {
atmel,pins =
<1 0 0x2 0x0>; /* PB0 periph B */
};
pinctrl_uart3_cts: uart3_cts-0 {
atmel,pins =
<1 1 0x2 0x0>; /* PB1 periph B */
};
};
nand {
pinctrl_nand: nand-0 {
atmel,pins =
<2 2 0x0 0x1 /* PC2 gpio RDY pin pull_up */
1 1 0x0 0x1>; /* PB1 gpio CD pin pull_up */
};
};
pioA: gpio@fffff400 {
compatible = "atmel,at91rm9200-gpio";
reg = <0xfffff400 0x200>;
interrupts = <2 4 1>;
#gpio-cells = <2>;
gpio-controller;
interrupt-controller;
#interrupt-cells = <2>;
};
pioB: gpio@fffff600 {
compatible = "atmel,at91rm9200-gpio";
reg = <0xfffff600 0x200>;
interrupts = <3 4 1>;
#gpio-cells = <2>;
gpio-controller;
interrupt-controller;
#interrupt-cells = <2>;
};
pioC: gpio@fffff800 {
compatible = "atmel,at91rm9200-gpio";
reg = <0xfffff800 0x200>;
interrupts = <4 4 1>;
#gpio-cells = <2>;
gpio-controller;
interrupt-controller;
#interrupt-cells = <2>;
};
pioD: gpio@fffffa00 {
compatible = "atmel,at91rm9200-gpio";
reg = <0xfffffa00 0x200>;
interrupts = <5 4 1>;
#gpio-cells = <2>;
gpio-controller;
interrupt-controller;
#interrupt-cells = <2>;
};
};
dbgu: serial@fffff200 {
compatible = "atmel,at91rm9200-usart";
reg = <0xfffff200 0x200>;
interrupts = <1 4 7>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_dbgu>;
status = "disabled";
};
usart0: serial@fffc0000 {
compatible = "atmel,at91rm9200-usart";
reg = <0xfffc0000 0x200>;
interrupts = <6 4 5>;
atmel,use-dma-rx;
atmel,use-dma-tx;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart0>;
status = "disabled";
};
usart1: serial@fffc4000 {
compatible = "atmel,at91rm9200-usart";
reg = <0xfffc4000 0x200>;
interrupts = <7 4 5>;
atmel,use-dma-rx;
atmel,use-dma-tx;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart1>;
status = "disabled";
};
usart2: serial@fffc8000 {
compatible = "atmel,at91rm9200-usart";
reg = <0xfffc8000 0x200>;
interrupts = <8 4 5>;
atmel,use-dma-rx;
atmel,use-dma-tx;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart2>;
status = "disabled";
};
usart3: serial@fffcc000 {
compatible = "atmel,at91rm9200-usart";
reg = <0xfffcc000 0x200>;
interrupts = <23 4 5>;
atmel,use-dma-rx;
atmel,use-dma-tx;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart3>;
status = "disabled";
};
usb1: gadget@fffb0000 {
compatible = "atmel,at91rm9200-udc";
reg = <0xfffb0000 0x4000>;
interrupts = <11 4 2>;
status = "disabled";
};
};
nand0: nand@40000000 {
compatible = "atmel,at91rm9200-nand";
#address-cells = <1>;
#size-cells = <1>;
reg = <0x40000000 0x10000000>;
atmel,nand-addr-offset = <21>;
atmel,nand-cmd-offset = <22>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_nand>;
nand-ecc-mode = "soft";
gpios = <&pioC 2 0
0
&pioB 1 0
>;
status = "disabled";
};
usb0: ohci@00300000 {
compatible = "atmel,at91rm9200-ohci", "usb-ohci";
reg = <0x00300000 0x100000>;
interrupts = <23 4 2>;
status = "disabled";
};
};
i2c@0 {
compatible = "i2c-gpio";
gpios = <&pioA 23 0 /* sda */
&pioA 24 0 /* scl */
>;
i2c-gpio,sda-open-drain;
i2c-gpio,scl-open-drain;
i2c-gpio,delay-us = <2>; /* ~100 kHz */
#address-cells = <1>;
#size-cells = <0>;
status = "disabled";
};
};

79
arch/arm/boot/dts/at91rm9200ek.dts Normal file
View File

@ -0,0 +1,79 @@
/*
* at91rm9200ek.dts - Device Tree file for Atmel AT91RM9200 evaluation kit
*
* Copyright (C) 2012 Joachim Eastwood <manabian@gmail.com>
*
* Licensed under GPLv2 only
*/
/dts-v1/;
/include/ "at91rm9200.dtsi"
/ {
model = "Atmel AT91RM9200 evaluation kit";
compatible = "atmel,at91rm9200ek", "atmel,at91rm9200";
memory {
reg = <0x20000000 0x4000000>;
};
clocks {
#address-cells = <1>;
#size-cells = <1>;
ranges;
main_clock: clock@0 {
compatible = "atmel,osc", "fixed-clock";
clock-frequency = <18432000>;
};
};
ahb {
apb {
dbgu: serial@fffff200 {
status = "okay";
};
usart1: serial@fffc4000 {
pinctrl-0 =
<&pinctrl_uart1
&pinctrl_uart1_rts
&pinctrl_uart1_cts
&pinctrl_uart1_dtr_dsr
&pinctrl_uart1_dcd
&pinctrl_uart1_ri>;
status = "okay";
};
usb1: gadget@fffb0000 {
atmel,vbus-gpio = <&pioD 4 0>;
status = "okay";
};
};
usb0: ohci@00300000 {
num-ports = <2>;
status = "okay";
};
};
leds {
compatible = "gpio-leds";
ds2 {
label = "green";
gpios = <&pioB 0 0x1>;
linux,default-trigger = "mmc0";
};
ds4 {
label = "yellow";
gpios = <&pioB 1 0x1>;
linux,default-trigger = "heartbeat";
};
ds6 {
label = "red";
gpios = <&pioB 2 0x1>;
};
};
};

295
arch/arm/boot/dts/at91sam9260.dtsi
View File

@ -21,8 +21,8 @@
serial2 = &usart1;
serial3 = &usart2;
serial4 = &usart3;
serial5 = &usart4;
serial6 = &usart5;
serial5 = &uart0;
serial6 = &uart1;
gpio0 = &pioA;
gpio1 = &pioB;
gpio2 = &pioC;
@ -98,40 +98,250 @@
interrupts = <26 4 0 27 4 0 28 4 0>;
};
pioA: gpio@fffff400 {
compatible = "atmel,at91rm9200-gpio";
reg = <0xfffff400 0x100>;
interrupts = <2 4 1>;
#gpio-cells = <2>;
gpio-controller;
interrupt-controller;
#interrupt-cells = <2>;
};
pinctrl@fffff400 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "atmel,at91rm9200-pinctrl", "simple-bus";
ranges = <0xfffff400 0xfffff400 0x600>;
pioB: gpio@fffff600 {
compatible = "atmel,at91rm9200-gpio";
reg = <0xfffff600 0x100>;
interrupts = <3 4 1>;
#gpio-cells = <2>;
gpio-controller;
interrupt-controller;
#interrupt-cells = <2>;
};
atmel,mux-mask = <
/* A B */
0xffffffff 0xffc00c3b /* pioA */
0xffffffff 0x7fff3ccf /* pioB */
0xffffffff 0x007fffff /* pioC */
>;
pioC: gpio@fffff800 {
compatible = "atmel,at91rm9200-gpio";
reg = <0xfffff800 0x100>;
interrupts = <4 4 1>;
#gpio-cells = <2>;
gpio-controller;
interrupt-controller;
#interrupt-cells = <2>;
/* shared pinctrl settings */
dbgu {
pinctrl_dbgu: dbgu-0 {
atmel,pins =
<1 14 0x1 0x0 /* PB14 periph A */
1 15 0x1 0x1>; /* PB15 periph with pullup */
};
};
usart0 {
pinctrl_usart0: usart0-0 {
atmel,pins =
<1 4 0x1 0x0 /* PB4 periph A */
1 5 0x1 0x0>; /* PB5 periph A */
};
pinctrl_usart0_rts: usart0_rts-0 {
atmel,pins =
<1 26 0x1 0x0>; /* PB26 periph A */
};
pinctrl_usart0_cts: usart0_cts-0 {
atmel,pins =
<1 27 0x1 0x0>; /* PB27 periph A */
};
pinctrl_usart0_dtr_dsr: usart0_dtr_dsr-0 {
atmel,pins =
<1 24 0x1 0x0 /* PB24 periph A */
1 22 0x1 0x0>; /* PB22 periph A */
};
pinctrl_usart0_dcd: usart0_dcd-0 {
atmel,pins =
<1 23 0x1 0x0>; /* PB23 periph A */
};
pinctrl_usart0_ri: usart0_ri-0 {
atmel,pins =
<1 25 0x1 0x0>; /* PB25 periph A */
};
};
usart1 {
pinctrl_usart1: usart1-0 {
atmel,pins =
<2 6 0x1 0x1 /* PB6 periph A with pullup */
2 7 0x1 0x0>; /* PB7 periph A */
};
pinctrl_usart1_rts: usart1_rts-0 {
atmel,pins =
<1 28 0x1 0x0>; /* PB28 periph A */
};
pinctrl_usart1_cts: usart1_cts-0 {
atmel,pins =
<1 29 0x1 0x0>; /* PB29 periph A */
};
};
usart2 {
pinctrl_usart2: usart2-0 {
atmel,pins =
<1 8 0x1 0x1 /* PB8 periph A with pullup */
1 9 0x1 0x0>; /* PB9 periph A */
};
pinctrl_usart2_rts: usart2_rts-0 {
atmel,pins =
<0 4 0x1 0x0>; /* PA4 periph A */
};
pinctrl_usart2_cts: usart2_cts-0 {
atmel,pins =
<0 5 0x1 0x0>; /* PA5 periph A */
};
};
usart3 {
pinctrl_usart3: usart3-0 {
atmel,pins =
<2 10 0x1 0x1 /* PB10 periph A with pullup */
2 11 0x1 0x0>; /* PB11 periph A */
};
pinctrl_usart3_rts: usart3_rts-0 {
atmel,pins =
<3 8 0x2 0x0>; /* PB8 periph B */
};
pinctrl_usart3_cts: usart3_cts-0 {
atmel,pins =
<3 10 0x2 0x0>; /* PB10 periph B */
};
};
uart0 {
pinctrl_uart0: uart0-0 {
atmel,pins =
<0 31 0x2 0x1 /* PA31 periph B with pullup */
0 30 0x2 0x0>; /* PA30 periph B */
};
};
uart1 {
pinctrl_uart1: uart1-0 {
atmel,pins =
<2 12 0x1 0x1 /* PB12 periph A with pullup */
2 13 0x1 0x0>; /* PB13 periph A */
};
};
nand {
pinctrl_nand: nand-0 {
atmel,pins =
<2 13 0x0 0x1 /* PC13 gpio RDY pin pull_up */
2 14 0x0 0x1>; /* PC14 gpio enable pin pull_up */
};
};
macb {
pinctrl_macb_rmii: macb_rmii-0 {
atmel,pins =
<0 12 0x1 0x0 /* PA12 periph A */
0 13 0x1 0x0 /* PA13 periph A */
0 14 0x1 0x0 /* PA14 periph A */
0 15 0x1 0x0 /* PA15 periph A */
0 16 0x1 0x0 /* PA16 periph A */
0 17 0x1 0x0 /* PA17 periph A */
0 18 0x1 0x0 /* PA18 periph A */
0 19 0x1 0x0 /* PA19 periph A */
0 20 0x1 0x0 /* PA20 periph A */
0 21 0x1 0x0>; /* PA21 periph A */
};
pinctrl_macb_rmii_mii: macb_rmii_mii-0 {
atmel,pins =
<0 22 0x2 0x0 /* PA22 periph B */
0 23 0x2 0x0 /* PA23 periph B */
0 24 0x2 0x0 /* PA24 periph B */
0 25 0x2 0x0 /* PA25 periph B */
0 26 0x2 0x0 /* PA26 periph B */
0 27 0x2 0x0 /* PA27 periph B */
0 28 0x2 0x0 /* PA28 periph B */
0 29 0x2 0x0>; /* PA29 periph B */
};
pinctrl_macb_rmii_mii_alt: macb_rmii_mii-1 {
atmel,pins =
<0 10 0x2 0x0 /* PA10 periph B */
0 11 0x2 0x0 /* PA11 periph B */
0 24 0x2 0x0 /* PA24 periph B */
0 25 0x2 0x0 /* PA25 periph B */
0 26 0x2 0x0 /* PA26 periph B */
0 27 0x2 0x0 /* PA27 periph B */
0 28 0x2 0x0 /* PA28 periph B */
0 29 0x2 0x0>; /* PA29 periph B */
};
};
mmc0 {
pinctrl_mmc0_clk: mmc0_clk-0 {
atmel,pins =
<0 8 0x1 0x0>; /* PA8 periph A */
};
pinctrl_mmc0_slot0_cmd_dat0: mmc0_slot0_cmd_dat0-0 {
atmel,pins =
<0 7 0x1 0x1 /* PA7 periph A with pullup */
0 6 0x1 0x1>; /* PA6 periph A with pullup */
};
pinctrl_mmc0_slot0_dat1_3: mmc0_slot0_dat1_3-0 {
atmel,pins =
<0 9 0x1 0x1 /* PA9 periph A with pullup */
0 10 0x1 0x1 /* PA10 periph A with pullup */
0 11 0x1 0x1>; /* PA11 periph A with pullup */
};
pinctrl_mmc0_slot1_cmd_dat0: mmc0_slot1_cmd_dat0-0 {
atmel,pins =
<0 1 0x2 0x1 /* PA1 periph B with pullup */
0 0 0x2 0x1>; /* PA0 periph B with pullup */
};
pinctrl_mmc0_slot1_dat1_3: mmc0_slot1_dat1_3-0 {
atmel,pins =
<0 5 0x2 0x1 /* PA5 periph B with pullup */
0 4 0x2 0x1 /* PA4 periph B with pullup */
0 3 0x2 0x1>; /* PA3 periph B with pullup */
};
};
pioA: gpio@fffff400 {
compatible = "atmel,at91rm9200-gpio";
reg = <0xfffff400 0x200>;
interrupts = <2 4 1>;
#gpio-cells = <2>;
gpio-controller;
interrupt-controller;
#interrupt-cells = <2>;
};
pioB: gpio@fffff600 {
compatible = "atmel,at91rm9200-gpio";
reg = <0xfffff600 0x200>;
interrupts = <3 4 1>;
#gpio-cells = <2>;
gpio-controller;
interrupt-controller;
#interrupt-cells = <2>;
};
pioC: gpio@fffff800 {
compatible = "atmel,at91rm9200-gpio";
reg = <0xfffff800 0x200>;
interrupts = <4 4 1>;
#gpio-cells = <2>;
gpio-controller;
interrupt-controller;
#interrupt-cells = <2>;
};
};
dbgu: serial@fffff200 {
compatible = "atmel,at91sam9260-usart";
reg = <0xfffff200 0x200>;
interrupts = <1 4 7>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_dbgu>;
status = "disabled";
};
@ -141,6 +351,8 @@
interrupts = <6 4 5>;
atmel,use-dma-rx;
atmel,use-dma-tx;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usart0>;
status = "disabled";
};
@ -150,6 +362,8 @@
interrupts = <7 4 5>;
atmel,use-dma-rx;
atmel,use-dma-tx;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usart1>;
status = "disabled";
};
@ -159,6 +373,8 @@
interrupts = <8 4 5>;
atmel,use-dma-rx;
atmel,use-dma-tx;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usart2>;
status = "disabled";
};
@ -168,24 +384,30 @@
interrupts = <23 4 5>;
atmel,use-dma-rx;
atmel,use-dma-tx;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usart3>;
status = "disabled";
};
usart4: serial@fffd4000 {
uart0: serial@fffd4000 {
compatible = "atmel,at91sam9260-usart";
reg = <0xfffd4000 0x200>;
interrupts = <24 4 5>;
atmel,use-dma-rx;
atmel,use-dma-tx;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart0>;
status = "disabled";
};
usart5: serial@fffd8000 {
uart1: serial@fffd8000 {
compatible = "atmel,at91sam9260-usart";
reg = <0xfffd8000 0x200>;
interrupts = <25 4 5>;
atmel,use-dma-rx;
atmel,use-dma-tx;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_uart1>;
status = "disabled";
};
@ -193,6 +415,8 @@
compatible = "cdns,at32ap7000-macb", "cdns,macb";
reg = <0xfffc4000 0x100>;
interrupts = <21 4 3>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_macb_rmii>;
status = "disabled";
};
@ -212,6 +436,15 @@
status = "disabled";
};
mmc0: mmc@fffa8000 {
compatible = "atmel,hsmci";
reg = <0xfffa8000 0x600>;
interrupts = <9 4 0>;
#address-cells = <1>;
#size-cells = <0>;
status = "disabled";
};
adc0: adc@fffe0000 {
compatible = "atmel,at91sam9260-adc";
reg = <0xfffe0000 0x100>;
@ -257,6 +490,8 @@
>;
atmel,nand-addr-offset = <21>;
atmel,nand-cmd-offset = <22>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_nand>;
gpios = <&pioC 13 0
&pioC 14 0
0

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