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    Subject[PATCH 2/5] Documentation: leds: Add description of brightness setting API
    Date
    This patch adds description of the LED subsystem API for
    setting an LED brightness.

    Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
    ---
    Documentation/leds/leds-class.txt | 21 +++++++++++++++++++++
    1 file changed, 21 insertions(+)

    diff --git a/Documentation/leds/leds-class.txt b/Documentation/leds/leds-class.txt
    index 62261c0..2cc38fa 100644
    --- a/Documentation/leds/leds-class.txt
    +++ b/Documentation/leds/leds-class.txt
    @@ -52,6 +52,27 @@ above leaves scope for further attributes should they be needed. If sections
    of the name don't apply, just leave that section blank.


    +Brightness setting API
    +======================
    +
    +LED subsystem core exposes following API for setting brightness:
    +
    + - led_set_brightness : if necessary, cancels the software blink timer that
    + implements blinking when the hardware doesn't; it is guaranteed
    + not to sleep, which implies the possibility of delegating the
    + job to a work queue task (uses led_set_brightness_nosleep
    + underneath - see below),
    + - led_set_brightness_sync : for use cases when immediate effect is desired;
    + it can block the caller for the time required for accessing
    + device registers and can sleep,
    + - led_set_brightness_nosleep : sets an LEDs brightness using either
    + brightness_set op, which is guaranteed not to sleep, or, if only
    + brightness_set_blocking op is available, delegates it to a work
    + queue task; this API is inteded for use by LED core and
    + led-triggers, as they can be called from atomic context, and thus
    + cannot sleep.
    +
    +
    Hardware accelerated blink of LEDs
    ==================================

    --
    1.7.9.5


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