On Tue, Apr 28, 2015 at 12:18 AM, Jacek Anaszewski
<j.anaszewski@xxxxxxxxxxx> wrote:
> This patch adds device tree binding documentation for
> 1.5A Step-Up Current Regulator for Flash LEDs.
>
Applied, thanks,
-Bryan
> Signed-off-by: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>
> Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
> Acked-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
> Cc: Bryan Wu <cooloney@xxxxxxxxx>
> Cc: Richard Purdie <rpurdie@xxxxxxxxx>
> Cc: devicetree@xxxxxxxxxxxxxxx
> ---
> .../devicetree/bindings/leds/leds-aat1290.txt | 41 ++++++++++++++++++++
> 1 file changed, 41 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/leds/leds-aat1290.txt
>
> diff --git a/Documentation/devicetree/bindings/leds/leds-aat1290.txt b/Documentation/devicetree/bindings/leds/leds-aat1290.txt
> new file mode 100644
> index 0000000..ef88b9c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/leds-aat1290.txt
> @@ -0,0 +1,41 @@
> +* Skyworks Solutions, Inc. AAT1290 Current Regulator for Flash LEDs
> +
> +The device is controlled through two pins: FL_EN and EN_SET. The pins when,
> +asserted high, enable flash strobe and movie mode (max 1/2 of flash current)
> +respectively.
> +
> +Required properties:
> +
> +- compatible : Must be "skyworks,aat1290".
> +- flen-gpios : Must be device tree identifier of the flash device FL_EN pin.
> +- enset-gpios : Must be device tree identifier of the flash device EN_SET pin.
> +
> +A discrete LED element connected to the device must be represented by a child
> +node - see Documentation/devicetree/bindings/leds/common.txt.
> +
> +Required properties of the LED child node:
> +- led-max-microamp : see Documentation/devicetree/bindings/leds/common.txt
> +- flash-max-microamp : see Documentation/devicetree/bindings/leds/common.txt
> + Maximum flash LED supply current can be calculated using
> + following formula: I = 1A * 162kohm / Rset.
> +- flash-timeout-us : see Documentation/devicetree/bindings/leds/common.txt
> + Maximum flash timeout can be calculated using following
> + formula: T = 8.82 * 10^9 * Ct.
> +
> +Optional properties of the LED child node:
> +- label : see Documentation/devicetree/bindings/leds/common.txt
> +
> +Example (by Ct = 220nF, Rset = 160kohm):
> +
> +aat1290 {
> + compatible = "skyworks,aat1290";
> + flen-gpios = <&gpj1 1 GPIO_ACTIVE_HIGH>;
> + enset-gpios = <&gpj1 2 GPIO_ACTIVE_HIGH>;
> +
> + camera_flash: flash-led {
> + label = "aat1290-flash";
> + led-max-microamp = <520833>;
> + flash-max-microamp = <1012500>;
> + flash-timeout-us = <1940000>;
> + };
> +};
> --
> 1.7.9.5
>
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