1. 24 6月, 2009 3 次提交
  2. 06 4月, 2009 8 次提交
  3. 30 3月, 2009 1 次提交
  4. 20 2月, 2009 1 次提交
  5. 16 1月, 2009 1 次提交
  6. 08 1月, 2009 3 次提交
  7. 21 10月, 2008 4 次提交
  8. 18 10月, 2008 1 次提交
  9. 24 9月, 2008 2 次提交
  10. 01 9月, 2008 1 次提交
  11. 23 7月, 2008 2 次提交
  12. 25 4月, 2008 3 次提交
  13. 23 4月, 2008 1 次提交
  14. 19 4月, 2008 1 次提交
  15. 09 2月, 2008 1 次提交
    • D
      PWM LED driver · de5c9ede
      David Brownell 提交于
      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: NDavid Brownell <dbrownell@users.sourceforge.net>
      Signed-off-by: NHaavard 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: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      de5c9ede
  16. 07 2月, 2008 5 次提交
  17. 16 10月, 2007 1 次提交
  18. 13 10月, 2007 1 次提交
    • A
      kconfig: syntax cleanup - drop support for "depends/requires/def_boolean" · 247537b9
      Adrian Bunk 提交于
      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: NAdrian 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: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
      247537b9