linux-kernel - Re: [PATCH v2 2/3] leds: ktd2692: add device tree bindings for ktd2692

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Message-id: <5508AD61.1060005@samsung.com>
Date:	Wed, 18 Mar 2015 07:40:33 +0900
From:	Jaehoon Chung <jh80.chung@...sung.com>
To:	Ingi Kim <ingi2.kim@...sung.com>, cooloney@...il.com,
	rpurdie@...ys.net, robh+dt@...nel.org, pawel.moll@....com,
	mark.rutland@....com, ijc+devicetree@...lion.org.uk,
	galak@...eaurora.org
Cc:	sakari.ailus@....fi, j.anaszewski@...sung.com,
	varkabhadram@...il.com, sw0312.kim@...sung.com,
	cw00.choi@...sung.com, ideal.song@...sung.com,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-leds@...r.kernel.org
Subject: Re: [PATCH v2 2/3] leds: ktd2692: add device tree bindings for ktd2692

On 03/17/2015 05:45 PM, Ingi Kim 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      | 37 ++++++++++++++++++++++
>  1 file changed, 37 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..1b44225
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/leds-ktd2692.txt
> @@ -0,0 +1,37 @@
> +* 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/Flash mode current, Flash timeout,
> +LVP(low voltage protection).
> +
> +Required properties:
> +	- compatible: "kinetic,ktd2692"
> +	- ctrl-gpio : gpio pin in order control ktd2692 flash led.
> +		There is an internal 300kOhm pull-down resistor at this pin
> +	- supply : "vin" LED supply
> +
> +Optional property:
> +	- flash-timeout-us : Maximum flash timeout in microseconds.
> +			flash timeout ranges from 0 to 1835000us and
> +			default is 1049000us.
> +
> +Example:
> +
> +vbat: fixedregulator@0 {
> +	compatible = "regulator-fixed";
> +	regulator-name = "vbat-supply";
> +	regulator-min-microvolt = <5000000>;
> +	regulator-max-microvolt = <5000000>;
> +	gpio = <>;

gpio = <> ? What do you mean?
And this is described at Documentation/devicetree/bindings/regulator/fixed-regulator.txt
I'm not sure whether this example really needs.

Best Regards,
Jaehoon Chung

> +	regulator-always-on;
> +};
> +
> +flash-led {
> +	compatible = "kinetic,ktd2692";
> +	ctrl-gpio = <&gpc0 1 0>;
> +	flash-timeout-us = <1835000>;
> +	vin-supply = <&vbat>;
> +};
> 

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