linux-kernel - Re: [PATCH/RFC v12 03/19] Documentation: leds: Add description of LED Flash class extension

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Date:	Mon, 9 Mar 2015 17:23:16 -0700
From:	Bryan Wu <cooloney@...il.com>
To:	Jacek Anaszewski <j.anaszewski@...sung.com>
Cc:	Linux LED Subsystem <linux-leds@...r.kernel.org>,
	"linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
	lkml <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Pavel Machek <pavel@....cz>,
	"rpurdie@...ys.net" <rpurdie@...ys.net>,
	Sakari Ailus <sakari.ailus@....fi>,
	Sylwester Nawrocki <s.nawrocki@...sung.com>
Subject: Re: [PATCH/RFC v12 03/19] Documentation: leds: Add description of LED
 Flash class extension

On Wed, Mar 4, 2015 at 8:14 AM, Jacek Anaszewski
<j.anaszewski@...sung.com> wrote:
> The documentation being added contains overall description of the
> LED Flash Class and the related sysfs attributes.
>

Thanks, merged!
-Bryan


> Signed-off-by: Jacek Anaszewski <j.anaszewski@...sung.com>
> Acked-by: Kyungmin Park <kyungmin.park@...sung.com>
> Cc: Bryan Wu <cooloney@...il.com>
> Cc: Richard Purdie <rpurdie@...ys.net>
> ---
>  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
>
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