linux-kernel - Re: [PATCH v8 2/3] leds: ktd2692: add device tree bindings for ktd2692

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Date:	Mon, 11 May 2015 11:26:59 +0900
From:	Ingi Kim <ingi2.kim@...sung.com>
To:	Jacek Anaszewski <j.anaszewski@...sung.com>
Cc:	cooloney@...il.com, rpurdie@...ys.net, robh+dt@...nel.org,
	pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	sakari.ailus@....fi, varkabhadram@...il.com, joe@...ches.com,
	sw0312.kim@...sung.com, cw00.choi@...sung.com,
	jh80.chung@...sung.com, ideal.song@...sung.com,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-leds@...r.kernel.org
Subject: Re: [PATCH v8 2/3] leds: ktd2692: add device tree bindings for ktd2692

Hi Jacek,

On 2015년 05월 08일 17:33, Jacek Anaszewski wrote:
> Hi Ingi,
> 
> On 05/08/2015 05:03 AM, Ingi Kim wrote:
>> This patch adds the device tree bindings for ktd2692 flash LEDs.
>> Add Optional properties of child node for Flash LED
>>
>> Signed-off-by: Ingi Kim <ingi2.kim@...sung.com>
>> Acked-by: Seung-Woo Kim <sw0312.kim@...sung.com>
>> Reviewed-by: Varka Bhadram <varkabhadram@...il.com>
>> ---
>>   .../devicetree/bindings/leds/leds-ktd2692.txt      | 50 ++++++++++++++++++++++
>>   1 file changed, 50 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..cf45492
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/leds/leds-ktd2692.txt
>> @@ -0,0 +1,50 @@
>> +* 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"
> 
> How about:
> 
> compatible : Should be "kinetic,ktd2692".
> 
> Pleas put space between the property name and a colon consequently.
> 
>> +- ctrl-gpio : gpio pin in order control CTRL pin
>> +- aux-gpio : gpio pin in order control AUX pin
> 
> Documentation/devicetree/bindings/gpio/gpio.txt states:
> 
> "GPIO properties should be named "[<name>-]gpios".
> 
> Please adhere to this. Also please begin description after colon
> with a capital letter and put a dot at the end of sentence, e.g.:
> 
> ctrl-gpios : Specifier of the GPIO connected to CTRL pin.
> aux-gpio : Specifier of the GPIO connected to AUX pin.
> 

I should have read binding test strictly.
I'll fix it

>> +Optional properties:
>> +- vin-supply : "vin" LED supply (2.7V to 5.5V)
>> +  See Documentation/devicetree/bindings/regulator/regulator.txt
>> +
>> +A discrete LED element connected to the device must be represented by a child
>> +node - see Documentation/devicetree/bindings/leds/common.txt.
>> +
>> +Required properties for flash LED child nodes:
>> +  See Documentation/devicetree/bindings/leds/common.txt
>> +- led-max-microamp : Minimum Threshold for Timer protection
>> +  is defined internally (Maximum 300mA)
>> +- flash-max-microamp : Flash LED maximum current
>> +  Formula : I(mA) = 15000 / Rset
>> +- flash-max-timeout-us : Flash LED maximum timeout
>> +
>> +Optional properties for flash LED child nodes:
>> +- label : see Documentation/devicetree/bindings/leds/common.txt
>> +
>> +Example:
>> +
>> +ktd2692 {
>> +    compatible = "kinetic,ktd2692";
>> +    ctrl-gpio = <&gpc0 1 0>;
>> +    aux-gpio = <&gpc0 2 0>;
> 
> ctrl-gpios = <&gpc0 1 0>;
> aux-gpios = <&gpc0 2 0>;
> 

Check it!

>> +    vin-supply = <&vbat>;
>> +
>> +    flash-led {
>> +        label = "ktd2692-flash";
>> +        led-max-microamp = <300000>;
>> +        flash-max-microamp = <1500000>;
>> +        flash-max-timeout-us = <1835000>;
>> +    };
>> +};
>>
> 
> 
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