linux-kernel - Re: [PATCH v23 01/16] dt: bindings: Add multicolor class dt bindings documention

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Message-ID: <c38653c7-5c57-4396-147e-e58e52a84830@gmail.com>
Date:   Sat, 2 May 2020 23:51:15 +0200
From:   Jacek Anaszewski <jacek.anaszewski@...il.com>
To:     Dan Murphy <dmurphy@...com>, pavel@....cz
Cc:     linux-leds@...r.kernel.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh@...nel.org>
Subject: Re: [PATCH v23 01/16] dt: bindings: Add multicolor class dt bindings
 documention

Dan,

Thanks for improving the bindings. Now we have one indentation
related issue, please look below at the example.

On 4/29/20 10:28 PM, Dan Murphy wrote:
> Add DT bindings for the LEDs multicolor class framework.
> Add multicolor ID to the color ID list for device tree bindings.
> 
> CC: Rob Herring <robh@...nel.org>
> Acked-by: Pavel Machek <pavel@....cz>
> Signed-off-by: Dan Murphy <dmurphy@...com>
> ---
>   .../bindings/leds/leds-class-multicolor.yaml  | 70 +++++++++++++++++++
>   drivers/leds/led-core.c                       |  1 +
>   include/dt-bindings/leds/common.h             |  3 +-
>   3 files changed, 73 insertions(+), 1 deletion(-)
>   create mode 100644 Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml
> 
> diff --git a/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml b/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml
> new file mode 100644
> index 000000000000..e6169ed5ed12
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/leds-class-multicolor.yaml
> @@ -0,0 +1,70 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/leds/leds-class-multicolor.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Common properties for the multicolor LED class.
> +
> +maintainers:
> +  - Dan Murphy <dmurphy@...com>
> +
> +description: |
> +  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.
> +  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.
> +
> +properties:
> +  color:
> +    description: |
> +      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.
> +
> +required:
> +  - color
> +
> +examples:
> +  - |
> +    #include <dt-bindings/leds/common.h>
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;

It would look neater if we had an empty line here.

> +        led-controller@14 {

We should have one more level of indentation below

> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +        compatible = "ti,lp5009";
> +        reg = <0x14>;
> +
> +        multi-led@1 {
> +          #address-cells = <1>;
> +          #size-cells = <0>;
> +          reg = <1>;
> +          color = <LED_COLOR_ID_MULTI>;
> +          function = LED_FUNCTION_CHARGING;
> +
> +          led@0 {
> +            reg = <0>;
> +            color = <LED_COLOR_ID_RED>;
> +          };
> +
> +          led@1 {
> +            reg = <1>;
> +            color = <LED_COLOR_ID_GREEN>;
> +          };
> +
> +          led@2 {
> +            reg = <2>;
> +            color = <LED_COLOR_ID_BLUE>;
> +          };
> +        };
> +      };
> +    };
> +
> +additionalProperties: false
> +...
> diff --git a/drivers/leds/led-core.c b/drivers/leds/led-core.c
> index f1f718dbe0f8..846248a0693d 100644
> --- a/drivers/leds/led-core.c
> +++ b/drivers/leds/led-core.c
> @@ -34,6 +34,7 @@ const char * const led_colors[LED_COLOR_ID_MAX] = {
>   	[LED_COLOR_ID_VIOLET] = "violet",
>   	[LED_COLOR_ID_YELLOW] = "yellow",
>   	[LED_COLOR_ID_IR] = "ir",
> +	[LED_COLOR_ID_MULTI] = "multicolor",
>   };
>   EXPORT_SYMBOL_GPL(led_colors);
>   
> diff --git a/include/dt-bindings/leds/common.h b/include/dt-bindings/leds/common.h
> index 0ce7dfc00dcb..a463ce6a8794 100644
> --- a/include/dt-bindings/leds/common.h
> +++ b/include/dt-bindings/leds/common.h
> @@ -30,7 +30,8 @@
>   #define LED_COLOR_ID_VIOLET	5
>   #define LED_COLOR_ID_YELLOW	6
>   #define LED_COLOR_ID_IR		7
> -#define LED_COLOR_ID_MAX	8
> +#define LED_COLOR_ID_MULTI	8
> +#define LED_COLOR_ID_MAX	9
>   
>   /* Standard LED functions */
>   /* Keyboard LEDs, usually it would be input4::capslock etc. */
>