linux-kernel - Re: [PATCH 1/4] dt-bindings: microchip: atmel,at91rm9200-tcb: add atmel,tcb-pwm

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Date:   Tue, 8 Sep 2020 14:48:34 -0600
From:   Rob Herring <robh@...nel.org>
To:     Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        linux-pwm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] dt-bindings: microchip: atmel,at91rm9200-tcb: add
 atmel,tcb-pwm

On Fri, Aug 21, 2020 at 12:55:43AM +0200, Alexandre Belloni wrote:
> Move the TCB pwm nodes under their parent and move its documentation to the
> main file.
> 
> Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
> ---
> Cc: Rob Herring <robh+dt@...nel.org>
> 
>  .../devicetree/bindings/pwm/atmel-tcb-pwm.txt | 16 ----------
>  .../soc/microchip/atmel,at91rm9200-tcb.yaml   | 31 ++++++++++++++++++-
>  2 files changed, 30 insertions(+), 17 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/pwm/atmel-tcb-pwm.txt
> 
> diff --git a/Documentation/devicetree/bindings/pwm/atmel-tcb-pwm.txt b/Documentation/devicetree/bindings/pwm/atmel-tcb-pwm.txt
> deleted file mode 100644
> index 985fcc65f8c4..000000000000
> --- a/Documentation/devicetree/bindings/pwm/atmel-tcb-pwm.txt
> +++ /dev/null
> @@ -1,16 +0,0 @@
> -Atmel TCB PWM controller
> -
> -Required properties:
> -- compatible: should be "atmel,tcb-pwm"
> -- #pwm-cells: should be 3. See pwm.yaml in this directory for a description of
> -  the cells format. The only third cell flag supported by this binding is
> -  PWM_POLARITY_INVERTED.
> -- tc-block: The Timer Counter block to use as a PWM chip.

What happened to 'tc-block'? Commit message should mention why it is 
gone.

> -
> -Example:
> -
> -pwm {
> -	compatible = "atmel,tcb-pwm";
> -	#pwm-cells = <3>;
> -	tc-block = <1>;
> -};
> diff --git a/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml b/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml
> index 55fffae05dcf..a51adfdb58f6 100644
> --- a/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml
> +++ b/Documentation/devicetree/bindings/soc/microchip/atmel,at91rm9200-tcb.yaml
> @@ -59,6 +59,7 @@ patternProperties:
>          items:
>            - enum:
>                - atmel,tcb-timer
> +              - atmel,tcb-pwm
>                - microchip,tcb-capture
>        reg:
>          description:
> @@ -68,11 +69,33 @@ patternProperties:
>  
>          minItems: 1
>          maxItems: 3
> +    required:
> +      - compatible
> +      - reg
> +
> +  "^pwm@[0-2]$":
> +    description: The timer block channels that are used as PWMs.
> +    $ref: ../../pwm/pwm.yaml#
> +    type: object
> +    properties:
> +      compatible:
> +        const: atmel,tcb-pwm
> +      reg:
> +        description:
> +          TCB channel to use for this PWM.

enum: [ 0, 1, 2 ]

> +
> +        maxItems: 1
> +      "#pwm-cells":
> +        description:
> +          The only third cell flag supported by this binding is
> +          PWM_POLARITY_INVERTED.
> +        const: 3
>  
>      required:
>        - compatible
>        - reg

       additionalProperties: false

>  
> +
>  allOf:
>    - if:
>        properties:
> @@ -158,7 +181,13 @@ examples:
>                          compatible = "atmel,tcb-timer";
>                          reg = <1>;
>                  };
> -        };
> +
> +                pwm@2 {
> +                        compatible = "atmel,tcb-pwm";
> +                        reg = <2>;
> +                        #pwm-cells = <3>;
> +                };
> +         };
>      /* TCB0 Capture with QDEC: */
>          timer@...0c000 {
>                  compatible = "atmel,at91rm9200-tcb", "simple-mfd", "syscon";
> -- 
> 2.26.2
>