'allowed_cpus' is a copy of policy->related_cpus and can be replaced by
it directly. At some places we are only concerned about online CPUs and
policy->cpus can be used there.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The OPPs are registered for all CPUs of a cpufreq policy now and we
don't need to run the loop in build_dyn_power_table(). Just check for
the policy->cpu and we should be fine.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The cpufreq policy can be used by the cpu_cooling driver, lets store it
in the cpufreq_cooling_device structure.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
We need such a routine at two places already, lets create one.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The CPU cooling driver uses the cpufreq policy, to get clip_cpus, the
frequency table, etc. Most of the callers of CPU cooling driver's
registration routines have the cpufreq policy with them, but they only
pass the policy->related_cpus cpumask. The __cpufreq_cooling_register()
routine then gets the policy by itself and uses it.
It would be much better if the callers can pass the policy instead
directly. This also fixes a basic design flaw, where the policy can be
freed while the CPU cooling driver is still active.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
'cpu' is used at only one place and there is no need to keep a separate
variable for it.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
There is only one user of cpufreq_cooling_get_level() and that already
has pointer to the cpufreq_cdev structure. It can directly call
get_level() instead and we can get rid of cpufreq_cooling_get_level().
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Objects of "struct thermal_cooling_device" are named a bit
inconsistently. Lets use cdev everywhere.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Objects of "struct cpufreq_cooling_device" are named a bit
inconsistently. Lets use cpufreq_cdev everywhere. Also note that the
lists containing such devices is renamed similarly too.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Just to make it look better.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
After the lock is dropped, it is possible that the cpufreq_dev gets
freed before we call get_level() and that can cause kernel to crash.
Drop the lock after we are done using the structure.
Cc: 4.2+ <stable@vger.kernel.org> # 4.2+
Fixes: 02373d7c69 ("thermal: cpu_cooling: fix lockdep problems in cpu_cooling")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Tested-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Tweak the Kconfig description to mention support for NSP and make the
default on for iProc based platforms.
Signed-off-by: Jon Mason <jon.mason@broadcom.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Add a missing character in this description for a function.
Acked-by: Keerthy <j-keerthy@ti.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The script "checkpatch.pl" pointed information out like the following.
WARNING: Possible unnecessary 'out of memory' message
Thus remove such statements here.
Link: http://events.linuxfoundation.org/sites/events/files/slides/LCJ16-Refactor_Strings-WSang_0.pdf
Acked-by: Keerthy <j-keerthy@ti.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
A multiplication for the size determination of a memory allocation
indicated that an array data structure should be processed.
Thus use the corresponding function "devm_kcalloc".
This issue was detected by using the Coccinelle software.
Acked-by: Keerthy <j-keerthy@ti.com>
Tested-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Making thermal_emergency_poweroff static fixes sparse warning:
drivers/thermal/thermal_core.c:6: warning: symbol
'thermal_emergency_poweroff' was not declared. Should it be static?
Fixes: ef1d87e06a ("thermal: core: Add a back up thermal shutdown mechanism")
Acked-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Building this driver with W=1 reports:
warning: variable 'trip' set but not used [-Wunused-but-set-variable]
The call for of_thermal_get_trip_points() is useless.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Pull thermal management updates from Zhang Rui:
- Fix a problem where orderly_shutdown() is called for multiple times
due to multiple critical overheating events raised in a short period
by platform thermal driver. (Keerthy)
- Introduce a backup thermal shutdown mechanism, which invokes
kernel_power_off()/emergency_restart() directly, after
orderly_shutdown() being issued for certain amount of time(specified
via Kconfig). This is useful in certain conditions that userspace may
be unable to power off the system in a clean manner and leaves the
system in a critical state, like in the middle of driver probing
phase. (Keerthy)
- Introduce a new interface in thermal devfreq_cooling code so that the
driver can provide more precise data regarding actual power to the
thermal governor every time the power budget is calculated. (Lukasz
Luba)
- Introduce BCM 2835 soc thermal driver and northstar thermal driver,
within a new sub-folder. (Rafał Miłecki)
- Introduce DA9062/61 thermal driver. (Steve Twiss)
- Remove non-DT booting on TI-SoC driver. Also add support to fetching
coefficients from DT. (Keerthy)
- Refactorf RCAR Gen3 thermal driver. (Niklas Söderlund)
- Small fix on MTK and intel-soc-dts thermal driver. (Dawei Chien,
Brian Bian)
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (25 commits)
thermal: core: Add a back up thermal shutdown mechanism
thermal: core: Allow orderly_poweroff to be called only once
Thermal: Intel SoC DTS: Change interrupt request behavior
trace: thermal: add another parameter 'power' to the tracing function
thermal: devfreq_cooling: add new interface for direct power read
thermal: devfreq_cooling: refactor code and add get_voltage function
thermal: mt8173: minor mtk_thermal.c cleanups
thermal: bcm2835: move to the broadcom subdirectory
thermal: broadcom: ns: specify myself as MODULE_AUTHOR
thermal: da9062/61: Thermal junction temperature monitoring driver
Documentation: devicetree: thermal: da9062/61 TJUNC temperature binding
thermal: broadcom: add Northstar thermal driver
dt-bindings: thermal: add support for Broadcom's Northstar thermal
thermal: bcm2835: add thermal driver for bcm2835 SoC
dt-bindings: Add thermal zone to bcm2835-thermal example
thermal: rcar_gen3_thermal: add suspend and resume support
thermal: rcar_gen3_thermal: store device match data in private structure
thermal: rcar_gen3_thermal: enable hardware interrupts for trip points
thermal: rcar_gen3_thermal: record and check number of TSCs found
thermal: rcar_gen3_thermal: check that TSC exists before memory allocation
...
orderly_poweroff is triggered when a graceful shutdown
of system is desired. This may be used in many critical states of the
kernel such as when subsystems detects conditions such as critical
temperature conditions. However, in certain conditions in system
boot up sequences like those in the middle of driver probes being
initiated, userspace will be unable to power off the system in a clean
manner and leaves the system in a critical state. In cases like these,
the /sbin/poweroff will return success (having forked off to attempt
powering off the system. However, the system overall will fail to
completely poweroff (since other modules will be probed) and the system
is still functional with no userspace (since that would have shut itself
off).
However, there is no clean way of detecting such failure of userspace
powering off the system. In such scenarios, it is necessary for a backup
workqueue to be able to force a shutdown of the system when orderly
shutdown is not successful after a configurable time period.
Reported-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Acked-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
thermal_zone_device_check --> thermal_zone_device_update -->
handle_thermal_trip --> handle_critical_trips --> orderly_poweroff
The above sequence happens every 250/500 mS based on the configuration.
The orderly_poweroff function is getting called every 250/500 mS.
With a full fledged file system it takes at least 5-10 Seconds to
power off gracefully.
In that period due to the thermal_zone_device_check triggering
periodically the thermal work queues bombard with
orderly_poweroff calls multiple times eventually leading to
failures in gracefully powering off the system.
Make sure that orderly_poweroff is called only once.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Acked-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
The interrupt request call in Intel SoC DTS driver may fail if
there is no underlying BIOS support. However, the user space
thermal daemon can still use the thermal zones created by the
SoC DTS driver in polling mode, therefore, instead of bailing
out on interrupt request failures, it is better just to log
a warning message and continue the init process.
Signed-off-by: Brian Bian <brian.bian@intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This patch adds another parameter to the trace function:
trace_thermal_power_devfreq_get_power().
In case when we call directly driver's code for the real power,
we do not have static/dynamic_power values. Instead we get total
power in the '*power' value. The 'static_power' and
'dynamic_power' are set to 0.
Therefore, we have to trace that '*power' value in this scenario.
CC: Steven Rostedt <rostedt@goodmis.org>
CC: Ingo Molnar <mingo@redhat.com>
CC: Zhang Rui <rui.zhang@intel.com>
CC: Eduardo Valentin <edubezval@gmail.com>
Acked-by: Javi Merino <javi.merino@kernel.org>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
This patch introduces a new interface for device drivers connected to
devfreq_cooling in the thermal framework: get_real_power().
Some devices have more sophisticated methods (like power counters)
to approximate the actual power that they use.
In the previous implementation we had a pre-calculated power
table which was then scaled by 'utilization'
('busy_time' and 'total_time' taken from devfreq 'last_status').
With this new interface the driver can provide more precise data
regarding actual power to the thermal governor every time the power
budget is calculated. We then use this value and calculate the real
resource utilization scaling factor.
Reviewed-by: Chris Diamand <chris.diamand@arm.com>
Acked-by: Javi Merino <javi.merino@kernel.org>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Move the code which gets the voltage for a given frequency.
This code will be resused in few places.
Acked-by: Javi Merino <javi.merino@kernel.org>
Signed-off-by: Lukasz Luba <lukasz.luba@arm.com>
Crystal Cove and Whiskey Cove are two different PMICs which are
installed on Intel Atom SoC based platforms.
Moreover there are two independent drivers that by some reason were
supposed (*) to get into one kernel module.
Fix the mess by clarifying Kconfig option for Crystal Cove and split
Whiskey Cove out of it.
(*) It looks like the configuration was never tested with
INTEL_SOC_PMIC=n. The line in Makefile is actually wrong.
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> (supporter:ACPI)
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
If thermal bank with 4 sensors, thermal driver should read TEMP_MSR3.
However, currently thermal driver would not read TEMP_MSR3 since mt8173
thermal driver only use 3 sensors on each thermal bank at the same time,
so this patch would not effect temperature.
Only if mt mt8173 thermal driver use 4 sensors on any thermal bank, would
read third sensor two times, and lose fourth sensor of vale.
cc: stable@vger.kernel.org
Fixes: b7cf005373 ("thermal: Add Mediatek thermal driver for mt2701.")
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Dawei Chien <dawei.chien@mediatek.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
We already have 2 Broadcom drivers and at least 1 more is coming. This
made us create broadcom subdirectory where bcm2835 should be moves now.
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Just in case someone uses modinfo to find (blame) me.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Add junction temperature monitoring supervisor device driver, compatible
with the DA9062 and DA9061 PMICs. A MODULE_DEVICE_TABLE() macro is added.
If the PMIC's internal junction temperature rises above T_WARN (125 degC)
an interrupt is issued. This T_WARN level is defined as the
THERMAL_TRIP_HOT trip-wire inside the device driver.
The thermal triggering mechanism is interrupt based and happens when the
temperature rises above a given threshold level. The component cannot
return an exact temperature, it only has knowledge if the temperature is
above or below a given threshold value. A status bit must be polled to
detect when the temperature falls below that threshold level again. A
kernel work queue is configured to repeatedly poll and detect when the
temperature falls below this trip-wire, between 1 and 10 second intervals
(defaulting at 3 seconds).
This scheme is provided as an example. It would be expected that any
final implementation will also include a notify() function and any of these
settings could be altered to match the application where appropriate.
When over-temperature is reached, the interrupt from the DA9061/2 will be
repeatedly triggered. The IRQ is therefore disabled when the first
over-temperature event happens and the status bit is polled using a
work-queue until it becomes false.
This strategy is designed to allow the periodic transmission of uevents
(HOT trip point) as the first level of temperature supervision method. It
is intended for non-invasive temperature control, where the necessary
measures for cooling the system down are left to the host software. Once
the temperature falls again, the IRQ is re-enabled so a new critical
over-temperature event can be detected.
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Signed-off-by: Steve Twiss <stwiss.opensource@diasemi.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Northstar is a SoC family commonly used in home routers. This commit
adds a driver for checking CPU temperature. As Northstar Plus seems to
also have this IP block this new symbol gets ARCH_BCM_IPROC dependency.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Jon Mason <jon.mason@broadcom.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Add basic thermal driver for bcm2835 SoC.
This driver currently make sure that tsense HW block is set up
correctly.
Tested-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Eric Anholt <eric@anholt.net>
Acked-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
To restore operation it's easiest to reinitialise all TSCs. In order to
do this the current trip window needs to be stored in the TSC structure
so that it can be restored upon resume.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The device match data needs to be accessible outside the probe function,
store it in the private data structure.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Enable hardware trip points by implementing the set_trips callback. The
thermal core will take care of setting the initial trip point window and
to update it once the driver reports a TSC has moved outside it.
The interrupt structure for this device is a bit odd. There is not a
dedicated IRQ for each TSC, instead the interrupts are shared between
all TSCs. IRQn is fired if the temp monitored in IRQTEMPn is reached in
any of the TSCs, example IRQ3 is fired if temperature in IRQTEMP3 is
reached in either TSC0, TSC1 or TSC2.
For this reason the usage of interrupts in this driver is an all-on or
all-off design. When an interrupt happens all TSCs are checked and all
thermal zones are updated. This could be refined to be more fine grained
but the thermal core takes care of only updating the thermal zones that
have left their trip point window.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Record how many TSCs are found in struct rcar_gen3_thermal_priv, this is
needed to be able to add hardware interrupts for trip points later. Also
add a check to make sure at least one TSC is found.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Move the check for a TSC resource before allocating memory for a new
TSC. If no TSC is found there is little point in allocating memory for
it.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
There is no point in protecting a register read with a lock. This is
most likely a leftover from when the driver was reworked before being
submitted for upstream.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The .thermal_init needs to be delayed a short amount of time to allow
for the TEMP register to contain something useful. If it's not delayed
these warnings are common during boot:
thermal thermal_zone0: failed to read out thermal zone (-5)
thermal thermal_zone1: failed to read out thermal zone (-5)
thermal thermal_zone2: failed to read out thermal zone (-5)
The warnings are triggered by the first call to .get_temp() while the
TEMP register contains 0 and rcar_gen3_thermal_get_temp() returns -EIO
since a TEMP value of 0 will result in a temperature reading which is
out of specifications.
This should have been done in the initial commit which adds the driver
as the same issue was found and corrected for r8a7795.
Fixes: 564e73d283 ("thermal: rcar_gen3_thermal: Add R-Car Gen3 thermal driver")
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
ti_thermal_expose_sensor always takes the
devm_thermal_zone_of_sensor_register call for registration
with the device tree nodes present for all the bandgap sensors
for omap3/4/5 and dra7 family. There are large chunks of unused
code. Removing all of them.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Now that slope and offset data are being passed from
device tree no need to populate in driver data.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Currently slope and offset values for calculating the hot spot
temperature of a thermal zone is being taken directly from driver
data. So fetch them from device tree.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The best place to register the CPU cooling device is from the cpufreq
driver as we would know if all the resources are already available or
not. That's what is done for the cpufreq-dt.c driver as well.
The cpu-cooling driver for dbx500 platform was just (un)registering
with the thermal framework and that can be handled easily by the cpufreq
driver as well and in proper sequence as well.
Get rid of the cooling driver and its its users and manage everything
from the cpufreq driver instead.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
It is possible for dev_pm_opp_find_freq_exact() to return errors. It was
all fine earlier as dev_pm_opp_get_voltage() had a check within it to
check for invalid OPPs, but dev_pm_opp_put() doesn't have any similar
checks and the callers need to make sure OPP is valid before calling
them.
Also update the later dev_warn_ratelimited() to not print the error
message as the OPP is guaranteed to be valid now.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
There isn't much the user can do on seeing these warnings, as the
hardware is actually okay. dev_err suits much better here.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
It is possible for dev_pm_opp_find_freq_exact() to return errors. It was
all fine earlier as dev_pm_opp_get_voltage() had a check within it to
check for invalid OPPs, but dev_pm_opp_put() doesn't have any similar
checks and the callers need to make sure OPP is valid before calling
them.
Also update the later dev_warn_ratelimited() to not print the error
message as the OPP is guaranteed to be valid now.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
There isn't much the user can do on seeing this warning, as the hardware
is actually okay. dev_err suits much better here.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
There is no need to check for IS_ERR() as we are looking for a very
particular error value here. Drop the first check.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
cooling_list_lock is covering not just cpufreq_dev_count, but also the
calls to cpufreq_register_notifier() and cpufreq_unregister_notifier().
Since cooling_list_lock is also used within cpufreq_thermal_notifier(),
lockdep reports a potential deadlock. Fix it by testing the condition
under cooling_list_lock and dropping the lock before calling
cpufreq_register_notifier(). And variable cpufreq_dev_count is removed
at the same time, because it's no longer needed after the fix.
Fixes: ae60608962 ("thermal: convert cpu_cooling to use an IDA")
Reported-and-Tested-by: Russell King <linux@armlinux.org.uk>
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
We are going to move scheduler ABI details to <uapi/linux/sched/types.h>,
which will be used from a number of .c files.
Create empty placeholder header that maps to <linux/types.h>.
Include the new header in the files that are going to need it.
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Pull thermal management updates from Zhang Rui:
- add thermal driver for R-Car Gen3 thermal sensors.
- add thermal driver for ZTE' zx2967 family thermal sensors.
- convert thermal ID allocation from IDR to IDA.
- fix a possible NULL dereference in imx thermal driver.
- fix a ti-soc-thermal driver dependency issue so that critical thermal
control is still available when CPU_THERMAL is not defined.
- update binding information for QorIQ thermal driver.
- a couple of cleanups in thermal core, intel_powerclamp, exynos,
dra752-thermal, mtk-thermal driver.
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
powerpc/mpc85xx: Update TMU device tree node for T1023/T1024
powerpc/mpc85xx: Update TMU device tree node for T1040/T1042
dt-bindings: Update QorIQ TMU thermal bindings
thermal: mtk_thermal: Staticise a number of data variables
thermal: arm: dra752: Remove all TSHUT related definitions
thermal: arm: dra752: Remove TSHUT configuration
thermal: ti-soc-thermal: Remove CPU_THERMAL Dependency from TI_THERMAL
thermal: imx: Fix possible NULL dereference.
thermal: exynos: Remove parsing unused samsung,tmu_cal_mode property
thermal: zx2967: add thermal driver for ZTE's zx2967 family
thermal: use cpumask_var_t for on-stack cpu masks
dt: bindings: add documentation for zx2967 family thermal sensor
thermal/intel_powerclamp: Remove set-but-not-used variables
thermal: rcar_gen3_thermal: Add R-Car Gen3 thermal driver
thermal: rcar_gen3_thermal: Document the R-Car Gen3
thermal: convert devfreq_cooling to use an IDA
thermal: convert cpu_cooling to use an IDA
thermal: convert clock cooling to use an IDA
thermal core: convert ID allocation to IDA
* pm-opp: (24 commits)
PM / OPP: Expose _of_get_opp_desc_node as dev_pm_opp API
PM / OPP: Make _find_opp_table_unlocked() static
PM / OPP: Update Documentation to remove RCU specific bits
PM / OPP: Simplify dev_pm_opp_get_max_volt_latency()
PM / OPP: Simplify _opp_set_availability()
PM / OPP: Move away from RCU locking
PM / OPP: Take kref from _find_opp_table()
PM / OPP: Update OPP users to put reference
PM / OPP: Add 'struct kref' to struct dev_pm_opp
PM / OPP: Use dev_pm_opp_get_opp_table() instead of _add_opp_table()
PM / OPP: Take reference of the OPP table while adding/removing OPPs
PM / OPP: Return opp_table from dev_pm_opp_set_*() routines
PM / OPP: Add 'struct kref' to OPP table
PM / OPP: Add per OPP table mutex
PM / OPP: Split out part of _add_opp_table() and _remove_opp_table()
PM / OPP: Don't expose srcu_head to register notifiers
PM / OPP: Rename dev_pm_opp_get_suspend_opp() and return OPP rate
PM / OPP: Don't allocate OPP table from _opp_allocate()
PM / OPP: Rename and split _dev_pm_opp_remove_table()
PM / OPP: Add light weight _opp_free() routine
...
Sparse throws following warnings:
drivers/thermal/mtk_thermal.c:186:11: warning: symbol 'mt8173_bank_data' was not declared. Should it be static?
drivers/thermal/mtk_thermal.c:193:11: warning: symbol 'mt8173_msr' was not declared. Should it be static?
drivers/thermal/mtk_thermal.c:197:11: warning: symbol 'mt8173_adcpnp' was not declared. Should it be static?
drivers/thermal/mtk_thermal.c:201:11: warning: symbol 'mt8173_mux_values' was not declared. Should it be static?
drivers/thermal/mtk_thermal.c:204:11: warning: symbol 'mt2701_bank_data' was not declared. Should it be static?
drivers/thermal/mtk_thermal.c:208:11: warning: symbol 'mt2701_msr' was not declared. Should it be static?
drivers/thermal/mtk_thermal.c:212:11: warning: symbol 'mt2701_adcpnp' was not declared. Should it be static?
drivers/thermal/mtk_thermal.c:216:11: warning: symbol 'mt2701_mux_values' was not declared. Should it be static?
Make these variables as static to fix these warnings.
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
No configuration needs to be done for TSHUT from software.
Hence remove all the unnecessary definitions.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Currently when CPU_THERMAL is not defined the thermal sensors
are not even exposed consequently no cooling is possible. CPU_THERMAL
eventually depends on CPUFREQ. CPPUFREQ is not the only cooling
for CPU.
The thermal shutdown for critical temperatures is another
cooling solution which will currently not get enabled if CPU_THERMAL
is not defined. Remove this dependency so as to have the last level
of thermal protection working even without CPUFREQ defined.
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
of_device_get_match_data could return NULL, and so can cause
a NULL pointer dereference later.
Signed-off-by: Shailendra Verma <shailendra.v@samsung.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The property samsung,tmu_cal_mode is not used and not used. We can
safely remove it.
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Putting a bare cpumask structure on the stack produces a warning on
large SMP configurations:
drivers/thermal/cpu_cooling.c: In function 'cpufreq_state2power':
drivers/thermal/cpu_cooling.c:644:1: warning: the frame size of 1056 bytes is larger than 1024 bytes [-Wframe-larger-than=]
drivers/thermal/cpu_cooling.c: In function '__cpufreq_cooling_register':
drivers/thermal/cpu_cooling.c:898:1: warning: the frame size of 1104 bytes is larger than 1024 bytes [-Wframe-larger-than=]
The recommended workaround is to use cpumask_var_t, which behaves just like
a normal cpu mask in most cases, but turns into a dynamic allocation
when CONFIG_CPUMASK_OFFSTACK is set.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
In poll_pkg_cstate() function, the variables jiffies_last and
jiffies_now are set but never used.
This has been detected by building the driver with W=1:
drivers/thermal/intel_powerclamp.c: In function ‘poll_pkg_cstate’:
drivers/thermal/intel_powerclamp.c:464:23: warning: variable
‘jiffies_last’ set but not used [-Wunused-but-set-variable]
static unsigned long jiffies_last;
^
Signed-off-by: Augusto Mecking Caringi <augustocaringi@gmail.com>
Acked-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
This patch updates dev_pm_opp_find_freq_*() routines to get a reference
to the OPPs returned by them.
Also updates the users of dev_pm_opp_find_freq_*() routines to call
dev_pm_opp_put() after they are done using the OPPs.
As it is guaranteed the that OPPs wouldn't get freed while being used,
the RCU read side locking present with the users isn't required anymore.
Drop it as well.
This patch also updates all users of devfreq_recommended_opp() which was
returning an OPP received from the OPP core.
Note that some of the OPP core routines have gained
rcu_read_{lock|unlock}() calls, as those still use RCU specific APIs
within them.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com> [Devfreq]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This reverts commit 7611fb6806 ("thermal: thermal_hwmon: Convert to
hwmon_device_register_with_info()").
Pavel Machek reported breakage in the Nokia N900 due to this commit.
We can revisit a proper fix for the warning later.
Reported-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Add support for R-Car Gen3 thermal sensors. Polling only for now,
interrupts will be added incrementally. Same goes for reading fuses.
This is documented already, but no hardware available for now.
Signed-off-by: Hien Dang <hien.dang.eb@renesas.com>
Signed-off-by: Thao Nguyen <thao.nguyen.yb@rvc.renesas.com>
Signed-off-by: Khiem Nguyen <khiem.nguyen.xt@renesas.com>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
[Niklas: document and rework temperature calculation]
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
As Ayaka reported the thermal was abormal on rk3288 at booting time.
thermal thermal_zone1: critical temperature reached(125 C),shutting down
thermal thermal_zone2: critical temperature reached(125 C),shutting down
thermal thermal_zone1: critical temperature reached(125 C),shutting down
thermal thermal_zone2: critical temperature reached(125 C),shutting down
...
The root caused by reading the invald analogic value, the value is zero
will convert the 125 degree to trigger the critical temperature.
Fixes it with insteading of the incorrect reading now.
Fixes commit cadf29dc2a
("thermal: rockchip: optimize the conversion table")
Reported-by: ayaka <ayaka@soulik.info>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The device_unregister call in thermal_zone_device_unregister causes the
thermal_zone_device structure to be freed before the call to free the
dynamically allocated attribute groups. This leads to a kernel panic.
Furthermore, the 4 calls to free the trip point attribute structures
occur before the call to unregister the device, leading to a kernel
panic when sysfs attempts to access the attributes to remove them.
Here is an example of a kernel panic when the cpu thermal zones are
removed upon cpu offline:
BUG: unable to handle kernel NULL pointer dereference at (null)
IP: strlen+0x0/0x20
<snip>
Call Trace:
? kernfs_name_hash+0x17/0x80
kernfs_find_ns+0x3f/0xd0
kernfs_remove_by_name_ns+0x36/0xa0
remove_files.isra.1+0x36/0x70
sysfs_remove_group+0x44/0x90
sysfs_remove_groups+0x2e/0x50
device_remove_attrs+0x5e/0x90
device_del+0x1ea/0x350
device_unregister+0x1a/0x60
thermal_zone_device_unregister+0x1f2/0x210
pkg_thermal_cpu_offline+0x14f/0x1a0 [x86_pkg_temp_thermal]
? kzalloc.constprop.2+0x10/0x10 [x86_pkg_temp_thermal]
cpuhp_invoke_callback+0x8d/0x3f0
cpuhp_down_callbacks+0x42/0x80
cpuhp_thread_fun+0x8b/0xf0
smpboot_thread_fn+0x110/0x160
kthread+0x101/0x140
? sort_range+0x30/0x30
? kthread_park+0x90/0x90
ret_from_fork+0x25/0x30
This patch moves the kfree calls to clean up the dynamic attributes to
the thermal_class's thermal_zone_device release function.
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: linux-pm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Tested-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
Signed-off-by: Jacob von Chorus <jacobvonchorus@cwphoto.ca>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
thermal devfreq cooling does not use the ability to look up pointers by
ID, so convert it from using an IDR to the more space-efficient IDA.
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
thermal cpu cooling does not use the ability to look up pointers by ID,
so convert it from using an IDR to the more space-efficient IDA.
The cooling_cpufreq_lock was being used to protect cpufreq_dev_count as
well as the IDR. Rather than keep the mutex to protect a single integer,
I expanded the scope of cooling_list_lock to also cover cpufreq_dev_count.
We could also convert cpufreq_dev_count into an atomic.
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
thermal clock cooling does not use the ability to look up pointers by ID,
so convert it from using an IDR to the more space-efficient IDA.
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
The thermal core does not use the ability to look up pointers by ID, so
convert it from using an IDR to the more space-efficient IDA.
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Booting Linux on a mx6q based board leads to the following warning:
(NULL device *): hwmon_device_register() is deprecated. Please convert the
driver to use hwmon_device_register_with_info().
,so do as suggested.
Also, this results in the core taking care of creating the 'name'
attribute, so drop the code doing that from the thermal driver.
Suggested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
In some cases, some sensors didn't need the trip points, the
set_trips will pass {-INT_MAX, INT_MAX} to trigger tsadc alarm in the end,
ignore this case and disable the high temperature interrupt.
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Reviewed-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
In order to support the valid temperature can conver to analog value.
The rockchip thermal driver has not supported the all valid temperature
to convert the analog value. (e.g.: 61C, 62C, 63C....)
For example:
In some cases, we need adjust the trip point.
$cd /sys/class/thermal/thermal_zone*
$echo 68000 > trip_point_0_temp
That will return the max analogic value indicates the invalid before
posting this patch.
So, this patch will optimize the conversion table to support the other
cases.
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
The temp_to_code function will return 0 when we set the temperature to a
invalid value (e.g. 61C, 62C, 63C....), that's unpractical. This patch
will prevent this case happening. That will return the max analog value to
indicate the temperature is invalid or over table temperature range.
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
This driver passes struct chip_tsadc_table by value throughout; this is
inefficient, and AFAICT, there is no reason for it. Let's pass pointers
instead.
Signed-off-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
These error messages don't give much information about what went wrong.
It would be nice, for one, to see what invalid temperature was being
requested when conversion fails. It's also good to return an error when
we can't handle a conversion properly.
While we're at it, fix the grammar too.
Signed-off-by: Brian Norris <briannorris@chromium.org>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
- New cpufreq driver for Broadcom STB SoCs and a Device Tree binding
for it (Markus Mayer).
- Support for ARM Integrator/AP and Integrator/CP in the generic
DT cpufreq driver and elimination of the old Integrator cpufreq
driver (Linus Walleij).
- Support for the zx296718, r8a7743 and r8a7745, Socionext UniPhier,
and PXA SoCs in the the generic DT cpufreq driver (Baoyou Xie,
Geert Uytterhoeven, Masahiro Yamada, Robert Jarzmik).
- cpufreq core fix to eliminate races that may lead to using
inactive policy objects and related cleanups (Rafael Wysocki).
- cpufreq schedutil governor update to make it use SCHED_FIFO
kernel threads (instead of regular workqueues) for doing delayed
work (to reduce the response latency in some cases) and related
cleanups (Viresh Kumar).
- New cpufreq sysfs attribute for resetting statistics (Markus
Mayer).
- cpufreq governors fixes and cleanups (Chen Yu, Stratos Karafotis,
Viresh Kumar).
- Support for using generic cpufreq governors in the intel_pstate
driver (Rafael Wysocki).
- Support for per-logical-CPU P-state limits and the EPP/EPB
(Energy Performance Preference/Energy Performance Bias) knobs
in the intel_pstate driver (Srinivas Pandruvada).
- New CPU ID for Knights Mill in intel_pstate (Piotr Luc).
- intel_pstate driver modification to use the P-state selection
algorithm based on CPU load on platforms with the system profile
in the ACPI tables set to "mobile" (Srinivas Pandruvada).
- intel_pstate driver cleanups (Arnd Bergmann, Rafael Wysocki,
Srinivas Pandruvada).
- cpufreq powernv driver updates including fast switching support
(for the schedutil governor), fixes and cleanus (Akshay Adiga,
Andrew Donnellan, Denis Kirjanov).
- acpi-cpufreq driver rework to switch it over to the new CPU
offline/online state machine (Sebastian Andrzej Siewior).
- Assorted cleanups in cpufreq drivers (Wei Yongjun, Prashanth
Prakash).
- Idle injection rework (to make it use the regular idle path
instead of a home-grown custom one) and related powerclamp
thermal driver updates (Peter Zijlstra, Jacob Pan, Petr Mladek,
Sebastian Andrzej Siewior).
- New CPU IDs for Atom Z34xx and Knights Mill in intel_idle (Andy
Shevchenko, Piotr Luc).
- intel_idle driver cleanups and switch over to using the new CPU
offline/online state machine (Anna-Maria Gleixner, Sebastian
Andrzej Siewior).
- cpuidle DT driver update to support suspend-to-idle properly
(Sudeep Holla).
- cpuidle core cleanups and misc updates (Daniel Lezcano, Pan Bian,
Rafael Wysocki).
- Preliminary support for power domains including CPUs in the
generic power domains (genpd) framework and related DT bindings
(Lina Iyer).
- Assorted fixes and cleanups in the generic power domains (genpd)
framework (Colin Ian King, Dan Carpenter, Geert Uytterhoeven).
- Preliminary support for devices with multiple voltage regulators
and related fixes and cleanups in the Operating Performance Points
(OPP) library (Viresh Kumar, Masahiro Yamada, Stephen Boyd).
- System sleep state selection interface rework to make it easier
to support suspend-to-idle as the default system suspend method
(Rafael Wysocki).
- PM core fixes and cleanups, mostly related to the interactions
between the system suspend and runtime PM frameworks (Ulf Hansson,
Sahitya Tummala, Tony Lindgren).
- Latency tolerance PM QoS framework imorovements (Andrew
Lutomirski).
- New Knights Mill CPU ID for the Intel RAPL power capping driver
(Piotr Luc).
- Intel RAPL power capping driver fixes, cleanups and switch over
to using the new CPU offline/online state machine (Jacob Pan,
Thomas Gleixner, Sebastian Andrzej Siewior).
- Fixes and cleanups in the exynos-ppmu, exynos-nocp, rk3399_dmc,
rockchip-dfi devfreq drivers and the devfreq core (Axel Lin,
Chanwoo Choi, Javier Martinez Canillas, MyungJoo Ham, Viresh
Kumar).
- Fix for false-positive KASAN warnings during resume from ACPI S3
(suspend-to-RAM) on x86 (Josh Poimboeuf).
- Memory map verification during resume from hibernation on x86 to
ensure a consistent address space layout (Chen Yu).
- Wakeup sources debugging enhancement (Xing Wei).
- rockchip-io AVS driver cleanup (Shawn Lin).
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Merge tag 'pm-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"Again, cpufreq gets more changes than the other parts this time (one
new driver, one old driver less, a bunch of enhancements of the
existing code, new CPU IDs, fixes, cleanups)
There also are some changes in cpuidle (idle injection rework, a
couple of new CPU IDs, online/offline rework in intel_idle, fixes and
cleanups), in the generic power domains framework (mostly related to
supporting power domains containing CPUs), and in the Operating
Performance Points (OPP) library (mostly related to supporting devices
with multiple voltage regulators)
In addition to that, the system sleep state selection interface is
modified to make it easier for distributions with unchanged user space
to support suspend-to-idle as the default system suspend method, some
issues are fixed in the PM core, the latency tolerance PM QoS
framework is improved a bit, the Intel RAPL power capping driver is
cleaned up and there are some fixes and cleanups in the devfreq
subsystem
Specifics:
- New cpufreq driver for Broadcom STB SoCs and a Device Tree binding
for it (Markus Mayer)
- Support for ARM Integrator/AP and Integrator/CP in the generic DT
cpufreq driver and elimination of the old Integrator cpufreq driver
(Linus Walleij)
- Support for the zx296718, r8a7743 and r8a7745, Socionext UniPhier,
and PXA SoCs in the the generic DT cpufreq driver (Baoyou Xie,
Geert Uytterhoeven, Masahiro Yamada, Robert Jarzmik)
- cpufreq core fix to eliminate races that may lead to using inactive
policy objects and related cleanups (Rafael Wysocki)
- cpufreq schedutil governor update to make it use SCHED_FIFO kernel
threads (instead of regular workqueues) for doing delayed work (to
reduce the response latency in some cases) and related cleanups
(Viresh Kumar)
- New cpufreq sysfs attribute for resetting statistics (Markus Mayer)
- cpufreq governors fixes and cleanups (Chen Yu, Stratos Karafotis,
Viresh Kumar)
- Support for using generic cpufreq governors in the intel_pstate
driver (Rafael Wysocki)
- Support for per-logical-CPU P-state limits and the EPP/EPB (Energy
Performance Preference/Energy Performance Bias) knobs in the
intel_pstate driver (Srinivas Pandruvada)
- New CPU ID for Knights Mill in intel_pstate (Piotr Luc)
- intel_pstate driver modification to use the P-state selection
algorithm based on CPU load on platforms with the system profile in
the ACPI tables set to "mobile" (Srinivas Pandruvada)
- intel_pstate driver cleanups (Arnd Bergmann, Rafael Wysocki,
Srinivas Pandruvada)
- cpufreq powernv driver updates including fast switching support
(for the schedutil governor), fixes and cleanus (Akshay Adiga,
Andrew Donnellan, Denis Kirjanov)
- acpi-cpufreq driver rework to switch it over to the new CPU
offline/online state machine (Sebastian Andrzej Siewior)
- Assorted cleanups in cpufreq drivers (Wei Yongjun, Prashanth
Prakash)
- Idle injection rework (to make it use the regular idle path instead
of a home-grown custom one) and related powerclamp thermal driver
updates (Peter Zijlstra, Jacob Pan, Petr Mladek, Sebastian Andrzej
Siewior)
- New CPU IDs for Atom Z34xx and Knights Mill in intel_idle (Andy
Shevchenko, Piotr Luc)
- intel_idle driver cleanups and switch over to using the new CPU
offline/online state machine (Anna-Maria Gleixner, Sebastian
Andrzej Siewior)
- cpuidle DT driver update to support suspend-to-idle properly
(Sudeep Holla)
- cpuidle core cleanups and misc updates (Daniel Lezcano, Pan Bian,
Rafael Wysocki)
- Preliminary support for power domains including CPUs in the generic
power domains (genpd) framework and related DT bindings (Lina Iyer)
- Assorted fixes and cleanups in the generic power domains (genpd)
framework (Colin Ian King, Dan Carpenter, Geert Uytterhoeven)
- Preliminary support for devices with multiple voltage regulators
and related fixes and cleanups in the Operating Performance Points
(OPP) library (Viresh Kumar, Masahiro Yamada, Stephen Boyd)
- System sleep state selection interface rework to make it easier to
support suspend-to-idle as the default system suspend method
(Rafael Wysocki)
- PM core fixes and cleanups, mostly related to the interactions
between the system suspend and runtime PM frameworks (Ulf Hansson,
Sahitya Tummala, Tony Lindgren)
- Latency tolerance PM QoS framework imorovements (Andrew Lutomirski)
- New Knights Mill CPU ID for the Intel RAPL power capping driver
(Piotr Luc)
- Intel RAPL power capping driver fixes, cleanups and switch over to
using the new CPU offline/online state machine (Jacob Pan, Thomas
Gleixner, Sebastian Andrzej Siewior)
- Fixes and cleanups in the exynos-ppmu, exynos-nocp, rk3399_dmc,
rockchip-dfi devfreq drivers and the devfreq core (Axel Lin,
Chanwoo Choi, Javier Martinez Canillas, MyungJoo Ham, Viresh Kumar)
- Fix for false-positive KASAN warnings during resume from ACPI S3
(suspend-to-RAM) on x86 (Josh Poimboeuf)
- Memory map verification during resume from hibernation on x86 to
ensure a consistent address space layout (Chen Yu)
- Wakeup sources debugging enhancement (Xing Wei)
- rockchip-io AVS driver cleanup (Shawn Lin)"
* tag 'pm-4.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (127 commits)
devfreq: rk3399_dmc: Don't use OPP structures outside of RCU locks
devfreq: rk3399_dmc: Remove dangling rcu_read_unlock()
devfreq: exynos: Don't use OPP structures outside of RCU locks
Documentation: intel_pstate: Document HWP energy/performance hints
cpufreq: intel_pstate: Support for energy performance hints with HWP
cpufreq: intel_pstate: Add locking around HWP requests
PM / sleep: Print active wakeup sources when blocking on wakeup_count reads
PM / core: Fix bug in the error handling of async suspend
PM / wakeirq: Fix dedicated wakeirq for drivers not using autosuspend
PM / Domains: Fix compatible for domain idle state
PM / OPP: Don't WARN on multiple calls to dev_pm_opp_set_regulators()
PM / OPP: Allow platform specific custom set_opp() callbacks
PM / OPP: Separate out _generic_set_opp()
PM / OPP: Add infrastructure to manage multiple regulators
PM / OPP: Pass struct dev_pm_opp_supply to _set_opp_voltage()
PM / OPP: Manage supply's voltage/current in a separate structure
PM / OPP: Don't use OPP structure outside of rcu protected section
PM / OPP: Reword binding supporting multiple regulators per device
PM / OPP: Fix incorrect cpu-supply property in binding
cpuidle: Add a kerneldoc comment to cpuidle_use_deepest_state()
..
Pull thermal management updates from Zhang Rui:
- Thermal core code reorganization and cleanup. Two new files are
created for thermal sysfs I/F code and thermal helper functions
(Eduardo Valentin).
- Sanitize hotplug and locking for x86_pkg_temp driver (Thomas
Gleixner)
- Update MAINTAINER file for pwm-fan driver and Samsung thermal driver
(Lukasz Majewski)
- Fix module auto-load for max77620, tango and db8500 thermal driver
(Javier Martinez Canillas)
- Fix a bug that thermal hwmon sysfs I/F returns wrong critical trip
point temperature value (Krzysztof Kozlowski)
- Add Skylake PCH 100 series support for intel_pch_thermal driver
(OGAWA Hirofumi)
- Small fixes and cleanups for platform thermal drivers (Julia Lawall,
Luis Henriques, Leo Yan, Stephen Boyd, Shawn Lin, Javi Merino and
Lukasz Luba)
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux: (76 commits)
MAINTAINERS: Samsung: Update maintainer for PWM FAN and SAMSUNG THERMAL
thermal/x86 pkg temp: Convert to hotplug state machine
thermal/x86_pkg_temp: Sanitize package management
thermal/x86_pkg_temp: Move work into package struct
thermal/x86_pkg_temp: Move work scheduled flag into package struct
thermal/x86_pkg_temp: Sanitize locking
thermal/x86_pkg_temp: Cleanup code some more
thermal/x86_pkg_temp: Cleanup namespace
thermal/x86_pkg_temp: Get rid of ref counting
thermal/x86_pkg_temp: Sanitize callback (de)initialization
thermal/x86_pkg_temp: Replace open coded cpu search
thermal/x86_pkg_temp: Remove redundant package search
thermal/x86_pkg_temp: Cleanup thermal interrupt handling
thermal: hwmon: Properly report critical temperature in sysfs
devfreq_cooling: pass a pointer to devfreq in the power model callbacks
devfreq_cooling: make the structs devfreq_cooling_xxx visible for all
dt-bindings: rockchip-thermal: fix the misleading description
thermal: rockchip: improve the warning log
thermal: db8500: Fix module autoload
thermal: tango: Fix module autoload
...
Pull x86 idle updates from Ingo Molnar:
"There were two bigger changes in this development cycle:
- remove idle notifiers:
32 files changed, 74 insertions(+), 803 deletions(-)
These notifiers were of questionable value and the main usecase,
the i7300 driver, was essentially unmaintained and can be removed,
plus modern power management concepts don't need the callback - so
use this golden opportunity and get rid of this opaque and fragile
callback from a latency sensitive code path.
(Len Brown, Thomas Gleixner)
- improve the AMD Erratum 400 workaround that used high overhead MSR
polling in the idle loop (Borisla Petkov, Thomas Gleixner)"
* 'x86-idle-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86: Remove empty idle.h header
x86/amd: Simplify AMD E400 aware idle routine
x86/amd: Check for the C1E bug post ACPI subsystem init
x86/bugs: Separate AMD E400 erratum and C1E bug
x86/cpufeature: Provide helper to set bugs bits
x86/idle: Remove enter_idle(), exit_idle()
x86: Remove x86_test_and_clear_bit_percpu()
x86/idle: Remove is_idle flag
x86/idle: Remove idle_notifier
i7300_idle: Remove this driver
One include less is always a good thing(tm). Good riddance.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20161209182912.2726-6-bp@alien8.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Install the callbacks via the state machine and let the core invoke
the callbacks on the already online CPUs.
Replace the wrmsr/rdmrs_on_cpu() calls in the hotplug callbacks as they are
guaranteed to be invoked on the incoming/outgoing cpu.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Packages are kept in a list, which must be searched over and over.
We can be smarter than that and just store the package pointers in an array
which is allocated at init time. Sizing of the array is determined from the
topology information. That makes the package search a simple array lookup.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Delayed work structs are held in a static percpu storage, which makes no
sense at all because work is strictly per package and we never schedule
more than one work per package.
Aside of that the work cancelation in the hotplug is broken when the work
is queued on the outgoing cpu and canceled. Nothing reschedules the work on
another online cpu in the package, so the interrupts stay disabled and the
work_scheduled flag stays active.
Move the delayed work struct into the package struct, which is the only
sensible place to have it.
To simplify the cancelation logic schedule the work always on the cpu which
is the target for the sysfs files. This is required so the cancelation
logic in the cpu offline path cancels only when the outgoing cpu is the
current target and reschedule the work when there is still a online
CPU in the package.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Storage for a boolean information whether work is scheduled for a package
is kept in separate allocated storage, which is resized when the number of
detected packages grows.
With the proper locking in place this is a completely pointless exercise
because we can simply stick it into the per package struct.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
The work cancellation code, the thermal zone unregistering, the work code
and the interrupt notification function are racy against each other and
against cpu hotplug and module exit. The random locking sprinkeled all
over the place does not help anything and probably exists to make people
feel good. The resulting issues (mainly use after free) are probably
hard to trigger, but they clearly exist
Protect the package list with a spinlock so it can be accessed from the
interrupt notifier and also from the work function. The add/removal code in
the hotplug callbacks take the lock for list manipulation. That makes sure
that on removal neither the interrupt notifier nor the work function can
access the about to be freed package structure anymore.
The thermal zone unregistering is another trainwreck. It's not serialized
against the work function. So unregistering the zone device can race with
the work function and cause havoc.
Protect the thermal zone with a mutex, which is held in the work
function to make sure that the zone device is not being unregistered
concurrently.
To solve the module exit issues, we simply invoke the cpu offline callback
and let it work its magic. For that it's required to keep track of the
participating cpus in a package, because topology_core_mask is not affected
by calling the offline callback for teardown of the driver, so it would
never free the package as there is always a valid target in
topology_core_mask.
Use proper names for the locks so it's clear what they are for and add a
pile of comments to explain the protection rules.
It's amazing that fixing the locking and adding 30 lines of comments
explaining it still removes more lines than it adds.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Coding style fixups and replacement of overly complex constructs and random
error codes instead of returning the real ones. This mess makes the eyes bleeding.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Any randomly chosen struct name is more descriptive than phy_dev_entry.
Rename the whole thing to struct pkg_device, which describes the content
reasonably well and use the same variable name throughout the code so it
gets readable. Rename the msr struct members as well.
No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
There is no point in the whole package data refcounting dance because
topology_core_cpumask tells us whether this is the last cpu in the
package. If yes, then the package can go, if not it stays. It's already
serialized via the hotplug code.
While at it rename the first_cpu member of the package structure to
cpu. The first has absolutely no meaning.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
The threshold callbacks are installed before the initialization of the
online cpus has succeeded and removed after the teardown has been
done. That's both wrong as callbacks might be invoked into a half
initialized or torn down state.
Move them to the proper places: Last in init() and first in exit().
While at it shorten the insane long and horrible named function names.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
find_next_sibling() iterates over the online cpus and searches for a cpu
with the same package id as the current cpu. This is a pointless exercise
as topology_core_cpumask() allows a simple cpumask search for an online cpu
on the same package.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Viresh Kumar