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authorJohan Hovold <jhovold@gmail.com>2012-05-29 15:07:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-29 16:22:32 -0700
commit401dea7f7ade662b77c33ce2498fb5b4f97cb29c (patch)
tree2e54d2e170e3e9ba0db256e633c91b2f802f9896 /Documentation/ABI/testing/sysfs-class-led-driver-lm3533
parente7e11d8ba807d451857b5c68abe249c7fc2b980f (diff)
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leds: add LM3533 LED driver
Add sub-driver for the LEDs on National Semiconductor / TI LM3533 lighting power chips. The chip provides 256 brightness levels, hardware accelerated blinking as well as ambient-light-sensor and pwm input control. Signed-off-by: Johan Hovold <jhovold@gmail.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Rob Landley <rob@landley.net> Cc: Samuel Ortiz <sameo@linux.intel.com> Cc: Jonathan Cameron <jic23@cam.ac.uk> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Cc: Bryan Wu <bryan.wu@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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+What: /sys/class/leds/<led>/als_channel
+Date: May 2012
+KernelVersion: 3.5
+Contact: Johan Hovold <jhovold@gmail.com>
+Description:
+ Set the ALS output channel to use as input in
+ ALS-current-control mode (1, 2), where
+
+ 1 - out_current1
+ 2 - out_current2
+
+What: /sys/class/leds/<led>/als_en
+Date: May 2012
+KernelVersion: 3.5
+Contact: Johan Hovold <jhovold@gmail.com>
+Description:
+ Enable ALS-current-control mode (0, 1).
+
+What: /sys/class/leds/<led>/falltime
+What: /sys/class/leds/<led>/risetime
+Date: April 2012
+KernelVersion: 3.5
+Contact: Johan Hovold <jhovold@gmail.com>
+Description:
+ Set the pattern generator fall and rise times (0..7), where
+
+ 0 - 2048 us
+ 1 - 262 ms
+ 2 - 524 ms
+ 3 - 1.049 s
+ 4 - 2.097 s
+ 5 - 4.194 s
+ 6 - 8.389 s
+ 7 - 16.78 s
+
+What: /sys/class/leds/<led>/id
+Date: April 2012
+KernelVersion: 3.5
+Contact: Johan Hovold <jhovold@gmail.com>
+Description:
+ Get the id of this led (0..3).
+
+What: /sys/class/leds/<led>/linear
+Date: April 2012
+KernelVersion: 3.5
+Contact: Johan Hovold <jhovold@gmail.com>
+Description:
+ Set the brightness-mapping mode (0, 1), where
+
+ 0 - exponential mode
+ 1 - linear mode
+
+What: /sys/class/leds/<led>/pwm
+Date: April 2012
+KernelVersion: 3.5
+Contact: Johan Hovold <jhovold@gmail.com>
+Description:
+ Set the PWM-input control mask (5 bits), where
+
+ bit 5 - PWM-input enabled in Zone 4
+ bit 4 - PWM-input enabled in Zone 3
+ bit 3 - PWM-input enabled in Zone 2
+ bit 2 - PWM-input enabled in Zone 1
+ bit 1 - PWM-input enabled in Zone 0
+ bit 0 - PWM-input enabled