From: Samuel Thibault Date: Tue, 17 Mar 2015 04:19:56 +0000 (-0700) Subject: Input: export LEDs as class devices in sysfs X-Git-Tag: omap-for-v4.3/legacy-v2-signed~159^2^2~4 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f60c8ba77dcea80af8facfd786a0d2c3ace86f3d;p=pandora-kernel.git Input: export LEDs as class devices in sysfs This change creates a new input handler called "leds" that exports LEDs on input devices as standard LED class devices in sysfs and allows controlling their state via sysfs or via any of the standard LED triggers. This allows to re-purpose and reassign LDEs on the keyboards to represent states other than the standard keyboard states (CapsLock, NumLock, etc). The old API of controlling input LEDs by writing into /dev/input/eventX devices is still present and will take precedence over accessing via LEDs subsystem (i.e. it may override state set by a trigger). If input device is "grabbed" then requests coming through LED subsystem will be ignored. Signed-off-by: Samuel Thibault Tested-by: Pavel Machek Acked-by: Pavel Machek Signed-off-by: Dmitry Torokhov --- diff --git a/Documentation/leds/leds-class.txt b/Documentation/leds/leds-class.txt index 79699c200766..62261c04060a 100644 --- a/Documentation/leds/leds-class.txt +++ b/Documentation/leds/leds-class.txt @@ -2,9 +2,6 @@ LED handling under Linux ======================== -If you're reading this and thinking about keyboard leds, these are -handled by the input subsystem and the led class is *not* needed. - In its simplest form, the LED class just allows control of LEDs from userspace. LEDs appear in /sys/class/leds/. The maximum brightness of the LED is defined in max_brightness file. The brightness file will set the brightness diff --git a/drivers/input/Kconfig b/drivers/input/Kconfig index a11ff74a5127..a35532ec00e4 100644 --- a/drivers/input/Kconfig +++ b/drivers/input/Kconfig @@ -25,6 +25,19 @@ config INPUT if INPUT +config INPUT_LEDS + tristate "Export input device LEDs in sysfs" + depends on LEDS_CLASS + default INPUT + help + Say Y here if you would like to export LEDs on input devices + as standard LED class devices in sysfs. + + If unsure, say Y. + + To compile this driver as a module, choose M here: the + module will be called input-leds. + config INPUT_FF_MEMLESS tristate "Support for memoryless force-feedback devices" help diff --git a/drivers/input/Makefile b/drivers/input/Makefile index 5ca3f631497f..0c9302ca9954 100644 --- a/drivers/input/Makefile +++ b/drivers/input/Makefile @@ -12,6 +12,7 @@ obj-$(CONFIG_INPUT_POLLDEV) += input-polldev.o obj-$(CONFIG_INPUT_SPARSEKMAP) += sparse-keymap.o obj-$(CONFIG_INPUT_MATRIXKMAP) += matrix-keymap.o +obj-$(CONFIG_INPUT_LEDS) += input-leds.o obj-$(CONFIG_INPUT_MOUSEDEV) += mousedev.o obj-$(CONFIG_INPUT_JOYDEV) += joydev.o obj-$(CONFIG_INPUT_EVDEV) += evdev.o Reading git-diff-tree failed