linux-kernel - Re: [PATCH v3 2/3] leds: ktd2692: add device tree bindings for ktd2692

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Message-ID: <CAL_Jsq+q6Dzqj5NTM4xwSp013-fZdSdPxBKbju1f6cSURExA0Q@mail.gmail.com>
Date:	Fri, 20 Mar 2015 10:49:51 -0500
From:	Rob Herring <robherring2@...il.com>
To:	Ingi Kim <ingi2.kim@...sung.com>
Cc:	Bryan Wu <cooloney@...il.com>, Richard Purdie <rpurdie@...ys.net>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Sakari Ailus <sakari.ailus@....fi>,
	Jacek Anaszewski <j.anaszewski@...sung.com>,
	Varka Bhadram <varkabhadram@...il.com>, sw0312.kim@...sung.com,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Jaehoon Chung <jh80.chung@...sung.com>,
	Inha Song <ideal.song@...sung.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-leds@...r.kernel.org
Subject: Re: [PATCH v3 2/3] leds: ktd2692: add device tree bindings for ktd2692

On Fri, Mar 20, 2015 at 12:31 AM, Ingi Kim <ingi2.kim@...sung.com> wrote:
> This patch adds the device tree bindings for ktd2692 flash LEDs.
> Add optional properties 'flash-timeout-us' to control flash timeout
> and 'vin-supply' for flash-led regulator
>
> Signed-off-by: Ingi Kim <ingi2.kim@...sung.com>
> ---
>  .../devicetree/bindings/leds/leds-ktd2692.txt      | 34 ++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/leds/leds-ktd2692.txt
>
> diff --git a/Documentation/devicetree/bindings/leds/leds-ktd2692.txt b/Documentation/devicetree/bindings/leds/leds-ktd2692.txt
> new file mode 100644
> index 0000000..75e16f8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/leds-ktd2692.txt
> @@ -0,0 +1,34 @@
> +* Kinetic Technologies - KTD2692 Flash LED Driver
> +
> +KTD2692 is the ideal power solution for high-power flash LEDs.
> +It uses ExpressWire single-wire programming for maximum flexibility.
> +
> +The ExpressWire interface through CTRL pin can control LED on/off and
> +enable/disable the IC, Movie(max 1/3 of Flash current) / Flash mode current,
> +Flash timeout, LVP(low voltage protection).
> +
> +Also, When the AUX pin is pulled high while CTRL pin is high,
> +LED current will be ramped up to the flash-mode current level.
> +
> +Required properties:
> +       - compatible: "kinetic,ktd2692"
> +       - ctrl-gpio, aux-gpio : gpio pin in order control ktd2692 flash led.
> +               There is an internal 300kOhm pull-down resistor at each pin
> +       - supply : "vin" LED supply (2.7V to 5.5V)

This should be "vin-supply", right?

> +               See Documentation/devicetree/bindings/regulator/regulator.txt
> +
> +Optional property:
> +       - flash-timeout-us : Maximum flash timeout in microseconds.
> +                       flash timeout ranges from 0 to 1835000us and
> +                       default is 1049000us.
> +
> +Example:
> +
> +flash-led {
> +       compatible = "kinetic,ktd2692";
> +       ctrl-gpio = <&gpc0 1 0>;
> +       aux-gpio = <&gpc0 2 0>;
> +       flash-timeout-us = <1835000>;
> +       vin-supply = <&vbat>;
> +};
> +
> --
> 2.0.5
>
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