linux-kernel - Re: [PATCH 1/4] dt-bindings: pwm: Add Apple PWM controller

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Date:   Fri, 28 Oct 2022 13:53:22 -0400
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Sasha Finkelstein <fnkl.kernel@...il.com>,
        thierry.reding@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
Cc:     marcan@...can.st, sven@...npeter.dev, alyssa@...enzweig.io,
        asahi@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
        linux-pwm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] dt-bindings: pwm: Add Apple PWM controller

On 28/10/2022 12:52, Sasha Finkelstein wrote:
> Apple SoCs such as the M1 contain a PWM controller used
> among other things to control the keyboard backlight.
> 
> Signed-off-by: Sasha Finkelstein <fnkl.kernel@...il.com>
> ---
>  .../devicetree/bindings/pwm/pwm-apple.yaml    | 51 +++++++++++++++++++
>  1 file changed, 51 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pwm/pwm-apple.yaml
> 
> diff --git a/Documentation/devicetree/bindings/pwm/pwm-apple.yaml b/Documentation/devicetree/bindings/pwm/pwm-apple.yaml
> new file mode 100644
> index 000000000000..39dc32e00a3f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/pwm-apple.yaml

Filename matching compatible, so apple,s5l-fpwm.yaml

> @@ -0,0 +1,51 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pwm/pwm-apple.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Apple FPWM controller
> +
> +maintainers:
> +  - asahi@...ts.linux.dev
> +  - Sasha Finkelstein <fnkl.kernel@...il.com>
> +
> +description: |+

Drop |+

> +  PWM controller used for keyboard backlight on ARM Macs
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - apple,t8103-fpwm
> +          - apple,t6000-fpwm
> +          - apple,t8112-fpwm
> +      - const: apple,s5l-fpwm

Is it then derived from Samsung platform? If yes, it is candidate for
merging.

> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +  "#pwm-cells":
> +    const: 2
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    pwm: fpwm@...044000 {

Generic node name, so just "pwm". Drop also label - it's not used in the
example.


Best regards,
Krzysztof