linux-kernel - Re: [[PATCH v2] 1/9] dt-bindings: pwm: Document Synopsys DesignWare snps,pwm

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Date:   Tue, 26 Jul 2022 12:05:05 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Ben Dooks <ben.dooks@...ive.com>, linux-pwm@...r.kernel.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Lee Jones <lee.jones@...aro.org>,
        u.kleine-koenig@...gutronix.de,
        Thierry Reding <thierry.reding@...il.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Greentime Hu <greentime.hu@...ive.com>
Subject: Re: [[PATCH v2] 1/9] dt-bindings: pwm: Document Synopsys DesignWare
 snps,pwm

On 25/07/2022 23:21, Ben Dooks wrote:
> Add documentation for the bindings for Synopsys' DesignWare PWM block
> as we will be adding DT/platform support to the Linux driver soon.
> 
> Signed-off-by: Ben Dooks <ben.dooks@...ive.com>
> --

This is not proper delimiter and causes the changelog to end up in commit.

Correct also wrong formatting of subject PATCH.

> v2:
> - fix #pwm-cells to be 3
> - fix indentation and ordering issues
> ---
>  .../devicetree/bindings/pwm/snps,pwm.yaml     | 40 +++++++++++++++++++
>  1 file changed, 40 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pwm/snps,pwm.yaml
> 
> diff --git a/Documentation/devicetree/bindings/pwm/snps,pwm.yaml b/Documentation/devicetree/bindings/pwm/snps,pwm.yaml
> new file mode 100644
> index 000000000000..594085e5e26f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/snps,pwm.yaml
> @@ -0,0 +1,40 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +# Copyright (C) 2022 SiFive, Inc.
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pwm/snps,pwm.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Synopsys PWM controller
> +
> +maintainers:
> +  - Ben Dooks <ben.dooks@...ive.com>
> +
> +allOf:
> +  - $ref: pwm.yaml#
> +
> +properties:
> +  compatible:
> +    const: snps,pwm

This is very generic compatible. I doubt that you cover here all
Synopsys PWM designs, past and future. You need a specific compatible.

> +
> +  "#pwm-cells":
> +    const: 3
> +
> +  clocks:
> +    items:
> +      - description: Interface bus clock
> +      - description: PWM reference clock
> +
> +  clock-names:
> +    items:
> +      - const: bus
> +      - const: timer
> +
> +required:
> +  - "#pwm-cells"
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +
> +additionalProperties: false

Missing example.


Best regards,
Krzysztof