linux-toradex.git/drivers/video/backlight/backlight.c, branch v2.6.27.12

backlight: Fix missing kernel doc entry

2008-07-23T08:50:18+00:00

Signed-off-by: Sebastian Siewior 
Signed-off-by: Richard Purdie

backlight: Avoid unecessary driver callbacks

2008-02-07T09:31:52+00:00

Avoid driver callbacks when the brightness hasn't changed since
they're not necessary.

Signed-off-by: Helge Deller 
Signed-off-by: Richard Purdie

backlight/leds: Make two structs static

2007-10-11T21:24:12+00:00

This patch makes two needlessly global structs static.

Signed-off-by: Adrian Bunk 
Signed-off-by: Andrew Morton 
Signed-off-by: Richard Purdie

backlight: Convert from struct class_device to struct device

2007-07-16T00:20:23+00:00

Convert the backlight and LCD classes from struct class_device
to struct device since class_device is scheduled for removal.

One nasty API break is the backlight power attribute has had to be
renamed to bl_power and the LCD power attribute has had to be renamed
to lcd_power since the original names clash with the core. I can't see
a way around this.

Signed-off-by: Richard Purdie 
Acked-by: Greg Kroah-Hartman

sysfs: kill unnecessary attribute->owner

2007-07-11T23:09:06+00:00

sysfs is now completely out of driver/module lifetime game.  After
deletion, a sysfs node doesn't access anything outside sysfs proper,
so there's no reason to hold onto the attribute owners.  Note that
often the wrong modules were accounted for as owners leading to
accessing removed modules.

This patch kills now unnecessary attribute->owner.  Note that with
this change, userland holding a sysfs node does not prevent the
backing module from being unloaded.

For more info regarding lifetime rule cleanup, please read the
following message.

  http://article.gmane.org/gmane.linux.kernel/510293

(tweaked by Greg to not delete the field just yet, to make it easier to
merge things properly.)

Signed-off-by: Tejun Heo 
Cc: Cornelia Huck 
Cc: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman

backlight: Separate backlight properties from backlight ops pointers

2007-02-20T09:26:53+00:00

Per device data such as brightness belongs to the indivdual device
and should therefore be separate from the the backlight operation
function pointers. This patch splits the two types of data and
allows simplifcation of some code.

Signed-off-by: Richard Purdie

backlight: Clean up pmac_backlight handling

2007-02-20T09:26:40+00:00

Move the setting/unsetting of pmac_backlight into the
backlight core instead of doing it in each driver.

Signed-off-by: Richard Purdie

backlight/fbcon: Add FB_EVENT_CONBLANK

2007-02-20T08:38:45+00:00

The backlight class wants notification whenever the console is blanked
but doesn't get this when hardware blanking fails and software blanking
is used. Changing FB_EVENT_BLANK to report both would be a behaviour
change which could confuse the console layer so add a new event for
software blanking and have the backlight class listen for both.

Signed-off-by: Richard Purdie

backlight: Convert semaphore -> mutex

2007-02-20T08:38:45+00:00

Convert internal semaphore to a mutex

Signed-off-by: Richard Purdie

backlight: Fix external uses of backlight internal semaphore

2007-02-20T08:38:45+00:00

backlight_device->sem has a very specific use as documented in the
header file. The external users of this are using it for a different
reason, to serialise access to the update_status() method.

backlight users were supposed to implement their own internal
serialisation of update_status() if needed but everyone is doing
things differently and incorrectly. Therefore add a global mutex to
take care of serialisation for everyone, once and for all.

Locking for get_brightness remains optional since most users don't
need it.

Also update the lcd class in a similar way.

Signed-off-by: Richard Purdie