The documentation being added contains overall description of the LED Flash Class and the related sysfs attributes. Signed-off-by: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx> Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> Cc: Bryan Wu <cooloney@xxxxxxxxx> Cc: Richard Purdie <rpurdie@xxxxxxxxx> --- Documentation/leds/leds-class-flash.txt | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 Documentation/leds/leds-class-flash.txt diff --git a/Documentation/leds/leds-class-flash.txt b/Documentation/leds/leds-class-flash.txt new file mode 100644 index 0000000..19bb673 --- /dev/null +++ b/Documentation/leds/leds-class-flash.txt @@ -0,0 +1,22 @@ + +Flash LED handling under Linux +============================== + +Some LED devices provide two modes - torch and flash. In the LED subsystem +those modes are supported by LED class (see Documentation/leds/leds-class.txt) +and LED Flash class respectively. The torch mode related features are enabled +by default and the flash ones only if a driver declares it by setting +LED_DEV_CAP_FLASH flag. + +In order to enable the support for flash LEDs CONFIG_LEDS_CLASS_FLASH symbol +must be defined in the kernel config. A LED Flash class driver must be +registered in the LED subsystem with led_classdev_flash_register function. + +Following sysfs attributes are exposed for controlling flash LED devices: +(see Documentation/ABI/testing/sysfs-class-led-flash) + - flash_brightness + - max_flash_brightness + - flash_timeout + - max_flash_timeout + - flash_strobe + - flash_fault -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
