linux-kernel - Re: [PATCH 1/2] dt-bindings: leds: lp50xx: correct reg/unit addresses in example

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Date:   Mon, 23 May 2022 16:35:28 -0500
From:   Rob Herring <robh@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Pavel Machek <pavel@....cz>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Dan Murphy <dmurphy@...com>,
        Jacek Anaszewski <jacek.anaszewski@...il.com>,
        Sven Schwermer <sven.schwermer@...ruptive-technologies.com>,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Kyle Swenson <kyle.swenson@....tech>
Subject: Re: [PATCH 1/2] dt-bindings: leds: lp50xx: correct reg/unit
 addresses in example

On Wed, May 18, 2022 at 10:22:14AM +0200, Krzysztof Kozlowski wrote:
> The multi-led node defined address/size cells, so it intended to have
> children with unit addresses.
> 
> The second multi-led's reg property defined three LED indexes within one
> reg item, which is not correct - these are three separate items.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> 
> ---
> 
> Cc: Kyle Swenson <kyle.swenson@....tech>
> ---
>  .../devicetree/bindings/leds/leds-lp50xx.yaml | 22 ++++++++++++-------
>  1 file changed, 14 insertions(+), 8 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/leds/leds-lp50xx.yaml b/Documentation/devicetree/bindings/leds/leds-lp50xx.yaml
> index f12fe5b53f30..dc1ac905bb91 100644
> --- a/Documentation/devicetree/bindings/leds/leds-lp50xx.yaml
> +++ b/Documentation/devicetree/bindings/leds/leds-lp50xx.yaml
> @@ -99,35 +99,41 @@ examples:
>                 color = <LED_COLOR_ID_RGB>;
>                 function = LED_FUNCTION_CHARGING;
>  
> -               led-0 {
> +               led@0 {
> +                   reg = <0x0>;
>                     color = <LED_COLOR_ID_RED>;
>                 };
>  
> -               led-1 {
> +               led@1 {
> +                   reg = <0x1>;
>                     color = <LED_COLOR_ID_GREEN>;
>                 };
>  
> -               led-2 {
> +               led@2 {
> +                   reg = <0x2>;
>                     color = <LED_COLOR_ID_BLUE>;
>                 };
>            };
>  
>            multi-led@2 {
>              #address-cells = <1>;
> -            #size-cells = <2>;
> -            reg = <0x2 0x3 0x5>;
> +            #size-cells = <0>;
> +            reg = <0x3>, <0x4>, <0x5>;

The unit-address is 2, but the reg value is 3?

>              color = <LED_COLOR_ID_RGB>;
>              function = LED_FUNCTION_STANDBY;
>  
> -            led-6 {
> +            led@3 {
> +              reg = <0x3>;
>                color = <LED_COLOR_ID_RED>;
>              };
>  
> -            led-7 {
> +            led@4 {
> +              reg = <0x4>;
>                color = <LED_COLOR_ID_GREEN>;
>              };
>  
> -            led-8 {
> +            led@5 {
> +              reg = <0x5>;
>                color = <LED_COLOR_ID_BLUE>;
>              };
>           };
> -- 
> 2.32.0
> 
>