linux-kernel - Re: [PATCH v8 3/9] dt: bindings: Add multicolor class dt bindings documention

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Date:   Mon, 23 Sep 2019 09:52:42 -0500
From:   Dan Murphy <dmurphy@...com>
To:     Jacek Anaszewski <jacek.anaszewski@...il.com>, <pavel@....cz>
CC:     <linux-leds@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v8 3/9] dt: bindings: Add multicolor class dt bindings
 documention

Jacek

On 9/21/19 7:57 AM, Jacek Anaszewski wrote:
> Dan,
>
> On 9/20/19 7:41 PM, Dan Murphy wrote:
>> Add DT bindings for the LEDs multicolor class framework.
>>
>> Signed-off-by: Dan Murphy <dmurphy@...com>
>> ---
>>   .../bindings/leds/leds-class-multicolor.txt   | 95 +++++++++++++++++++
>>   1 file changed, 95 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/leds/leds-class-multicolor.txt
>>
>> diff --git a/Documentation/devicetree/bindings/leds/leds-class-multicolor.txt b/Documentation/devicetree/bindings/leds/leds-class-multicolor.txt
>> new file mode 100644
>> index 000000000000..215d3c90f351
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/leds/leds-class-multicolor.txt
>> @@ -0,0 +1,95 @@
>> +* Multicolor LED properties
>> +
>> +Monochrome LEDs can grouped into LED clusters.  These clusters can provide a
>> +visible output that have a wide range of colors and intensities.
> Here is the same issue as I spotted in a review for the patch 2/9
> from this set:
>
> "
> I'd say it won't be the most frequent use case. We can expect rather
> compound RGB, RGBA[UV] etc. LED elements being connected to iouts of
> multi color LED controllers like LP50xx.
> "
>
> How about:
>
> Bindings for multi color LEDs show how to describe current outputs of
> either integrated multi-color LED elements (like RGB, RGBW, RGBWA-UV
> etc.) or standalone LEDs, to achieve logically grouped multi-color LED
> modules. This is achieved by adding multi-led nodes layer to the
> monochrome LED bindings.

Ack

Dan

>> +
>> +The nodes and properties defined in this document are unique to the multicolor
>> +LED class.  Common LED nodes and properties are inherited from the common.txt
>> +within this documentation directory.
>> +
>> +Required LED Child properties:
>> +	- color : For multicolor LED support this property should be defined as
>> +		  LED_COLOR_ID_MULTI and further definition can be found in
>> +		  include/linux/leds/common.h.
>> +
>> +led-controller@30 {
>> +	#address-cells = <1>;
>> +	#size-cells = <0>;
>> +	compatible = "ti,lp5024";
>> +	reg = <0x29>;
>> +
>> +	multi-led@1 {
>> +		#address-cells = <1>;
>> +		#size-cells = <0>;
>> +		reg = <1>;
>> +		color = <LED_COLOR_ID_MULTI>;
>> +		function = LED_FUNCTION_STATUS;
>> +
>> +
>> +		led@3 {
>> +			reg = <3>;
>> +			color = <LED_COLOR_ID_RED>;
>> +		};
>> +
>> +		led@4 {
>> +			reg = <4>;
>> +			color = <LED_COLOR_ID_GREEN>;
>> +		};
>> +
>> +		led@5 {
>> +			reg = <5>;
>> +			color = <LED_COLOR_ID_BLUE>;
>> +		};
>> +	};
>> +
>> +	multi-led@2 {
>> +		#address-cells = <1>;
>> +		#size-cells = <0>;
>> +		color = <LED_COLOR_ID_MULTI>;
>> +		function = LED_FUNCTION_ACTIVITY;
>> +		reg = <2>;
>> +		ti,led-bank = <2 3 5>;
>> +
>> +		led@6 {
>> +			reg = <0x6>;
>> +			color = <LED_COLOR_ID_RED>;
>> +			led-sources = <6 9 15>;
>> +		};
>> +
>> +		led@7 {
>> +			reg = <0x7>;
>> +			color = <LED_COLOR_ID_GREEN>;
>> +			led-sources = <7 10 16>;
>> +		};
>> +
>> +		led@8 {
>> +			reg = <0x8>;
>> +			color = <LED_COLOR_ID_BLUE>;
>> +			led-sources = <8 11 17>;
>> +		};
>> +	};
>> +
>> +	multi-led@4 {
>> +		#address-cells = <1>;
>> +		#size-cells = <0>;
>> +		reg = <4>;
>> +		color = <LED_COLOR_ID_MULTI>;
>> +		function = LED_FUNCTION_ACTIVITY;
>> +
>> +		led@12 {
>> +			reg = <12>;
>> +			color = <LED_COLOR_ID_RED>;
>> +		};
>> +
>> +		led@13 {
>> +			reg = <13>;
>> +			color = <LED_COLOR_ID_GREEN>;
>> +		};
>> +
>> +		led@14 {
>> +			reg = <14>;
>> +			color = <LED_COLOR_ID_BLUE>;
>> +		};
>> +	};
>> +
>> +};
>>