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  1. 06 Apr, 2009 1 commit
    • Trent Piepho's avatar
      leds: Add openfirmware platform device support · a7d878af
      Trent Piepho authored 
      Add bindings to support LEDs defined as of_platform devices in addition to
the existing bindings for platform devices.

New options in Kconfig allow the platform binding code and/or the
of_platform code to be turned on.  The of_platform code is of course only
available on archs that have OF support.

The existing probe and remove methods are refactored to use new functions
create_gpio_led(), to create and register one led, and delete_gpio_led(),
to unregister and free one led.  The new probe and remove methods for the
of_platform driver can then share most of the common probe and remove code
with the platform driver.

The suspend and resume methods aren't shared, but they are very short.  The
actual led driving code is the same for LEDs created by either binding.

The OF bindings are based on patch by Anton Vorontsov
<avorontsov@ru.mvista.com>.  They have been extended to allow multiple LEDs
per device.
Signed-off-by: default avatarTrent Piepho <tpiepho@freescale.com>
Acked-by: default avatarGrant Likely <grant.likely@secretlab.ca>
Acked-by: default avatarSean MacLennan <smaclennan@pikatech.com>
Signed-off-by: default avatarRichard Purdie <rpurdie@linux.intel.com>
      a7d878af
  3. 30 Mar, 2009 1 commit
  5. 20 Feb, 2009 1 commit
  7. 16 Jan, 2009 1 commit
  9. 08 Jan, 2009 3 commits
  11. 20 Oct, 2008 4 commits
  13. 17 Oct, 2008 1 commit
  15. 23 Sep, 2008 2 commits
  17. 01 Sep, 2008 1 commit
  19. 23 Jul, 2008 2 commits
  21. 24 Apr, 2008 3 commits
  23. 23 Apr, 2008 1 commit
  25. 19 Apr, 2008 1 commit
  27. 08 Feb, 2008 1 commit
    • David Brownell's avatar
      PWM LED driver · de5c9ede
      David Brownell authored 
      This is a LED driver using the PWM on newer SOCs from Atmel; brightness is
controlled by changing the PWM duty cycle.  So for example if you've set up
two leds labeled "pwm0" and "pwm1":

	echo 0 > /sys/class/leds/pwm2/brightness	# off (0%)
	echo 80 > /sys/class/leds/pwm2/brightness
	echo 255 > /sys/class/leds/pwm2/brightness	# on (100%)

Note that "brightness" here isn't linear; maybe that should change.  Going
from 4 to 8 probably doubles perceived brightness, while 244 to 248 is
imperceptible.

This is mostly intended to be a simple example of PWM, although it's
realistic since LCD backlights are often driven with PWM to conserve
battery power (and offer brightness options).
Signed-off-by: default avatarDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: default avatarHaavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Andrew Victor <linux@maxim.org.za>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      de5c9ede
  29. 07 Feb, 2008 5 commits
  31. 15 Oct, 2007 1 commit
  33. 12 Oct, 2007 1 commit
    • Adrian Bunk's avatar
      kconfig: syntax cleanup - drop support for "depends/requires/def_boolean" · 247537b9
      Adrian Bunk authored 
      Remove the following redundant and never or rarely used kconfig syntax:

- "def_boolean" (same as "def_bool")
- "requires" (same as "depends on")
- "depends" (same as "depends on")

This patch contains the code changes and Kconfig updates.
The shipped files are in next patch to let actual codechange stand out.
Signed-off-by: default avatarAdrian Bunk <bunk@kernel.org>
Cc: "Randy.Dunlap" <rdunlap@xenotime.net>
Cc: Bryan Wu <bryan.wu@analog.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarSam Ravnborg <sam@ravnborg.org>
      247537b9
  35. 11 Oct, 2007 2 commits
  37. 16 Jul, 2007 2 commits
  39. 10 May, 2007 1 commit
  41. 15 Feb, 2007 2 commits
  43. 12 Dec, 2006 1 commit
  45. 07 Dec, 2006 1 commit
    • Kristian Kielhofner's avatar
      [PATCH] PCEngines WRAP LED Support · 0d75565f
      Kristian Kielhofner authored 
      A driver for the PCEngines WRAP boards (http://www.pcengines.ch), which are
very similar to the Soekris net4801 (same NS SC1100 geode reference
design).

The LEDs on the WRAP are on different GPIO lines and I have modified and
copied the net48xx error led support for this.  It also includes support
for an "extra" led (in addition to error).  The three LEDs on the WRAP are
at GPIO lines 2,3,18 (WRAP LEDs from left to right).  This driver gives
access to the second and third LEDs by twiddling GPIO lines 3 & 18.

Because these boards are so similar to the net48xx, I basically sed-ed that
driver to form the basis for leds-wrap.c.  The only changes from
leds-net48xx.c are:

 - #define WRAP_EXTRA_LED_GPIO

 - name changes

 - duplicate relevant sections to provide support for the "extra" led

 - reverse the various *_led_set values.  The WRAP is "backwards" from the
   net48xx, and these needed to be updated for that.

[akpm@osdl.org: build fix]
Signed-off-by: default avatarKristian Kielhofner <kris@krisk.org>
Acked-by: default avatarRichard Purdie <rpurdie@rpsys.net>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      0d75565f
  47. 10 Jul, 2006 1 commit