Commit Graph

27 Commits

Author SHA1 Message Date
H Hartley Sweeten 2178218027 i2c: Use <linux/io.h> instead of <asm/io.h>
As warned by checkpatch.pl, <linux/io.h> should be used instead of
<asm/io.h>.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-05-21 18:41:01 +02:00
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00
Márton Németh 4111ecd217 i2c: Make PCI device ids constant
The id_table field of the struct pci_driver is constant in <linux/pci.h>
so it is worth to make initialization data also constant.

The semantic match that finds this kind of pattern is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
disable decl_init,const_decl_init;
identifier I1, I2, x;
@@
	struct I1 {
	  ...
	  const struct I2 *x;
	  ...
	};
@s@
identifier r.I1, y;
identifier r.x, E;
@@
	struct I1 y = {
	  .x = E,
	};
@c@
identifier r.I2;
identifier s.E;
@@
	const struct I2 E[] = ... ;
@depends on !c@
identifier r.I2;
identifier s.E;
@@
+	const
	struct I2 E[] = ...;
// </smpl>

Signed-off-by: Márton Németh <nm127@freemail.hu>
Cc: Julia Lawall <julia@diku.dk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-03-02 12:23:37 +01:00
Jean Delvare 18669eabde i2c: Hide probe errors caused by ACPI resource conflicts
When an ACPI resource conflict is detected, error messages are already
printed by ACPI. There's no point in causing the driver core to print
more error messages, so return one of the error codes for which no
message is printed.

This fixes bug #14293:
http://bugzilla.kernel.org/show_bug.cgi?id=14293

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-10-04 22:53:45 +02:00
Roel Kluin a746b578d8 i2c: Timeouts reach -1
With a postfix decrement these timeouts reach -1 rather than 0, but
after the loop it is tested whether they have become 0.

As pointed out by Jean Delvare, the condition we are waiting for should
also be tested before the timeout. With the current order, you could
exit with a timeout error while the job is actually done.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-02-24 19:19:48 +01:00
Jean Delvare 1745522ccb i2c: Delete many unused adapter IDs
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-01-26 21:19:52 +01:00
Jean Delvare 54fb4a05af i2c: Check for ACPI resource conflicts
Check for ACPI resource conflicts in i2c bus drivers. I've included
all recent SMBus master drivers for PC hardware.

I've voluntarily left out:
* Drivers that don't run on PCs: they can't conflict with ACPI.
* Bit-banged bus device drivers: it's very unlikely that ACPI would
  deal with such buses.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
2008-07-14 22:38:33 +02:00
Jean Delvare 3401b2fff3 i2c: Let bus drivers add SPD to their class
Let general purpose I2C/SMBus bus drivers add SPD to their class. Once
this is done, we will be able to tell the eeprom driver to only probe
for SPD EEPROMs and similar on these buses.

Note that I took a conservative approach here, adding I2C_CLASS_SPD to
many drivers that have no idea whether they can host SPD EEPROMs or not.
This is to make sure that the eeprom driver doesn't stop probing buses
where SPD EEPROMs or equivalent live.

So, bus driver maintainers and users should feel free to remove the SPD
class from drivers those buses never have SPD EEPROMs or they don't
want the eeprom driver to bind to them. Likewise, feel free to add the
SPD class to any bus driver I might have missed.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-07-14 22:38:29 +02:00
David Brownell 97140342e6 i2c: Bus drivers return -Errno not -1
Tighten error paths used by various i2c adapters (mostly x86) so
they return real fault/errno codes instead of a "-1" (which is
most often interpreted as "-EPERM").  Build tested, with eyeball
review.

One minor initial goal is to have adapters consistently return
the code "-ENXIO" when addressing a device doesn't get an ACK
response, at least in the probe paths where they are already
good at stifling related logspam.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-07-14 22:38:25 +02:00
David Brownell 6662cbb989 i2c: Rename the PEC functionality bit
Rename I2C_FUNC_SMBUS_HWPEC_CALC as I2C_FUNC_SMBUS_PEC, and list that
functionality as always available through the software implementation.
Update documentation accordingly (and list similar requirements).

The way it's currently packaged doesn't present the capability in a
useful way.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-10-13 23:56:33 +02:00
David Brownell 2096b956d2 i2c: Shrink struct i2c_client
This shrinks the size of "struct i2c_client" by 40 bytes:

 - Substantially shrinks the string used to identify the chip type
 - The "flags" don't need to be so big
 - Removes some internal padding

It also adds kerneldoc for that struct, explaining how "name" is really a
chip type identifier; it's otherwise potentially confusing.

Because the I2C_NAME_SIZE symbol was abused for both i2c_client.name
and for i2c_adapter.name, this needed to affect i2c_adapter too.  The
adapters which used that symbol now use the more-obviously-correct
idiom of taking the size of that field.

JD: Shorten i2c_adapter.name from 50 to 48 bytes while we're here, to
avoid wasting space in padding.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-05-01 23:26:28 +02:00
Jean Delvare 58791fd81d i2c-amd8111: Missed cleanup
I missed one cleanup in my previous patch.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-03-22 19:49:00 +01:00
Robert P. J. Day 405ae7d381 Replace remaining references to "driverfs" with "sysfs".
Globally, s/driverfs/sysfs/g.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2007-02-17 19:13:42 +01:00
Tim Schmielau cd354f1ae7 [PATCH] remove many unneeded #includes of sched.h
After Al Viro (finally) succeeded in removing the sched.h #include in module.h
recently, it makes sense again to remove other superfluous sched.h includes.
There are quite a lot of files which include it but don't actually need
anything defined in there.  Presumably these includes were once needed for
macros that used to live in sched.h, but moved to other header files in the
course of cleaning it up.

To ease the pain, this time I did not fiddle with any header files and only
removed #includes from .c-files, which tend to cause less trouble.

Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha,
arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig,
allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all
configs in arch/arm/configs on arm.  I also checked that no new warnings were
introduced by the patch (actually, some warnings are removed that were emitted
by unnecessarily included header files).

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14 08:09:54 -08:00
Jean Delvare 88b9e750e9 i2c-amd8111: Proposed cleanups
Proposed cleanups to the i2c-amd8111 SMBus driver:
* Fold long lines.
* Add an explicit mask when writing the low byte of a word.
* Use I2C_SMBUS_BLOCK_MAX instead of hardcoding 32.
* Discard extra blank lines.
* Use boolean not instead of bitwise not for bit tests, it's clearer.
* Return -EBUSY rather than -1 on I/O resource conflict.
* Fix a race on device registration, initialization should be done
  before the bus is registered.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-02-13 22:09:02 +01:00
Stephen Hemminger 9ace555d7d i2c: Add IDs to adapters
IDs have been defined but not used by most of the I2C adapters.
By having a unique ID, clients can check for correct connection
during probe.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-02-13 22:09:01 +01:00
Jean Delvare 8f9082c5ce i2c: Constify i2c_algorithm declarations, part 2
i2c: Constify i2c_algorithm declarations, part 2

Make struct i2c_algorithm declarations const in all i2c bus drivers
where it is possible.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-09-26 15:38:52 -07:00
Greg Kroah-Hartman 249bb070f5 [PATCH] PCI: removed unneeded .owner field from struct pci_driver
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-11-10 16:09:17 -08:00
Jean Delvare 585b3160f8 [PATCH] i2c: SMBus PEC support rewrite, 3 of 3
The new SMBus PEC implementation doesn't support PEC emulation on
non-PEC non-I2C SMBus masters, so we can drop all related code.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-10-28 14:02:14 -07:00
Deepak Saxena 5263ebb51e [PATCH] i2c: kzalloc conversion, other drivers
Use kzalloc instead of kmalloc+memset in all remaining i2c bus and
chip drivers.

Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-10-28 14:02:12 -07:00
Laurent Riffard ccd7aa0cc9 [PATCH] Owner field additions to many i2c drivers, 1 of 5
This patch updates .owner field for various struct pci_driver variables.

Signed-off-by: Laurent Riffard <laurent.riffard@free.fr>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-10-28 14:02:11 -07:00
Jean Delvare 0f69a612f9 [PATCH] i2c: Minor i2c-amd8111 cleanup
I noticed a useless instruction in the i2c-amd8111 driver.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
CC: Vojtech Pavlik <vojtech@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

 drivers/i2c/busses/i2c-amd8111.c |    1 -
 1 file changed, 1 deletion(-)
2005-10-28 14:02:07 -07:00
Jean Delvare d6072f842a [PATCH] i2c: Reuse name strings in i2c bus drivers
Clean up name string usage in 12 i2c bus drivers:
* Use the i2c_adapter name for requesting the I/O region rather than
  redefining a new string.
* Do not initialize the i2c_adapter name to "unset".
This should save a few data bytes here and there.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

 drivers/i2c/busses/i2c-ali1535.c |    6 +++---
 drivers/i2c/busses/i2c-ali1563.c |    6 ++++--
 drivers/i2c/busses/i2c-ali15x3.c |    5 +++--
 drivers/i2c/busses/i2c-amd756.c  |    5 ++---
 drivers/i2c/busses/i2c-amd8111.c |    4 +++-
 drivers/i2c/busses/i2c-i801.c    |    4 ++--
 drivers/i2c/busses/i2c-nforce2.c |    4 ++--
 drivers/i2c/busses/i2c-piix4.c   |    4 ++--
 drivers/i2c/busses/i2c-sis5595.c |    5 +++--
 drivers/i2c/busses/i2c-sis630.c  |    6 ++++--
 drivers/i2c/busses/i2c-sis96x.c  |    5 +++--
 drivers/i2c/busses/i2c-via.c     |    4 ++--
 12 files changed, 33 insertions(+), 25 deletions(-)
2005-10-28 14:02:06 -07:00
Jean Delvare 1d8b9e1bad [PATCH] I2C: Kill i2c_algorithm.id (4/7)
There are no more users of i2c_algorithm.id, so we can finally drop
this structure member.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-05 09:14:29 -07:00
Jean Delvare 975185880d [PATCH] I2C: Kill i2c_algorithm.name (1/7)
The name member of the i2c_algorithm is never used, although all
drivers conscientiously fill it. We can drop it completely, this
structure doesn't need to have a name.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-09-05 09:14:27 -07:00
Alexey Dobriyan f0bb60e7b1 [PATCH] I2C: drivers/i2c/*: #include <linux/config.h> cleanup
Files that don't use CONFIG_* stuff shouldn't include config.h
Files that use CONFIG_* stuff should include config.h

It's that simple. ;-)

Signed-off-by: Alexey Dobriyan <adobriyan@mail.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2005-06-21 21:51:53 -07:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00