linux-toradex.git/drivers/video/w100fb.c, branch v3.6.1

video: w100fb: Reduce sleep mode battery discharge

2012-07-08T14:03:02+00:00

In 2006 and 2007 the handhelds.org kernel w100fb driver was patched to
reduce sleep mode battery discharge. Unfortunately those two patches
never migrated to the mainline kernel.

Fortunately the function affected - w100_suspend() - has not changed
since; thus those patches still apply cleanly.

Applying those patches to linux-3.4-rc3 running on an HP iPAQ hx4700
reduces the sleep mode battery discharge from approximately 26 mA to
approximately 11 mA.

This patch combines those two patches into a single unified patch.

Signed-off-by: Paul Parsons 
Cc: Matt Reimer 
Cc: Philipp Zabel 
Signed-off-by: Florian Tobias Schandinat

video: convert drivers/video/* to use module_platform_driver()

2011-12-03T22:08:42+00:00

This patch converts the drivers in drivers/video/* to use the
module_platform_driver() macro which makes the code smaller and a bit
simpler.

Cc: Ben Dooks 
Cc: Manuel Lauss 
Signed-off-by: Axel Lin 
Acked-by: Wan ZongShun 
Acked-by: Sascha Hauer 
Acked-by: Lennert Buytenhek 
Acked-by: Alexey Charkov 
Acked-by: Damian Hobson-Garcia 
Acked-by: Jingoo Han 
Signed-off-by: Florian Tobias Schandinat

video: Add module.h to drivers/video files who really use it.

2011-10-31T23:31:33+00:00

They were getting this implicitly by an include of module.h
from device.h -- but we are going to clean that up and break
that include chain, so include module.h explicitly now.

[ with contributions from Axel Lin  ]

Signed-off-by: Paul Gortmaker

Fix common misspellings

2011-03-31T14:26:23+00:00

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi

drivers/video/w100fb.c: ignore void return value / fix build failure

2010-08-10T03:44:53+00:00

Fix a build failure "error: void value not ignored as it ought to be"
by removing an assignment of a void return value.  The functionality of
the code is not changed.

Signed-off-by: Peter Huewe 
Acked-by: Henrik Kretzschmar 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

fbdev: section cleanup in w100fb

2010-05-25T15:07:08+00:00

Fix up the section in the w100fb driver, by moving:

*	w100fb_remove() from .text to .devexit.text

*	w100_get_xtal_table() from .text to .devinit.text

*	w100fb_init() from .devinit.text to .init.text

Signed-off-by: Henrik Kretzschmar 
Acked-by: Uwe Kleine-König 
Cc: 	[if "platform-drivers: move probe to .devinit.text in drivers/video" was merged]
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30T13:02:32+00:00

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 
Guess-its-ok-by: Christoph Lameter 
Cc: Ingo Molnar 
Cc: Lee Schermerhorn

platform-drivers: move probe to .devinit.text in drivers/video

2010-03-08T01:04:50+00:00

A pointer to a probe callback is passed to the core via
platform_driver_register and so the function must not disappear when the
.init sections are discarded.  Otherwise (if also having HOTPLUG=y)
unbinding and binding a device to the driver via sysfs will result in an
oops as does a device being registered late.

An alternative to this patch is using platform_driver_probe instead of
platform_driver_register plus removing the pointer to the probe function
from the struct platform_driver.

Signed-off-by: Uwe Kleine-König 
Cc: Adrian Bunk 
Cc: Alberto Mardegan 
Cc: Andrew Morton 
Cc: Andriy Skulysh 
Cc: Antonino Daplas 
Cc: Anton Vorontsov 
Cc: Ben Dooks 
Cc: Chandramouli Narayanan 
Cc: Christoph Hellwig 
Cc: Frans Pop 
Cc: Geert Uytterhoeven 
Cc: Greg Kroah-Hartman 
Cc: Helge Deller 
Cc: Huang Ying 
Cc: Ian Molton 
Cc: Joshua Kinard 
Cc: Kaj-Michael Lang 
Cc: Krzysztof Helt 
Cc: linux-fbdev-devel@lists.sourceforge.net
Cc: Maciej W. Rozycki 
Cc: Magnus Damm 
Cc: Martin Michlmayr 
Cc: Matthias Kaehlcke 
Cc: Paul Mundt 
Cc: Pavel Machek 
Cc: Philipp Zabel 
Cc: Richard Purdie 
Cc: Roel Kluin 
Cc: Roland Stigge 
Cc: Russell King 
Cc: Thomas Bogendoerfer 
Cc: Vincent Sanders 
Cc: Yoichi Yuasa 
Acked-by: Ralf Baechle 
Acked-by: Arnaud Patard 
Acked-by: James Simmons 
Acked-by: Peter Jones 
Acked-by: Jaya Kumar 
Signed-off-by: Greg Kroah-Hartman

w100fb: fix regression with uninitalized fb_info->mm_lock mutex

2009-07-08T16:19:49+00:00

Remove redundant call to the w100fb_set_par() before w100 frambuffer is
registered.

This fixes a problem with uninitialized the fb_info->mm_lock mutex
introduced by the commit 537a1bf059f " fbdev: add mutex for fb_mmap
locking"

Signed-off-by: Krzysztof Helt 
Signed-off-by: Linus Torvalds

fbdev: add mutex for fb_mmap locking

2009-07-01T01:56:00+00:00

Add a mutex to avoid a circular locking problem between the mm layer
semaphore and fbdev ioctl mutex through the fb_mmap() call.

Also, add mutex to all places where smem_start and smem_len fields change
so the mutex inside the fb_mmap() is actually used.  Changing of these
fields before calling the framebuffer_register() are not mutexed.

This is 2.6.31 material.  It removes one lockdep (fb_mmap() and
register_framebuffer()) but there is still another one (fb_release() and
register_framebuffer()).  It also cleans up handling of the smem_start and
smem_len fields used by mutexed section of the fb_mmap().

Signed-off-by: Krzysztof Helt 
Cc: Peter Zijlstra 
Cc: "Rafael J. Wysocki" 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds