linux-kernel - Re: [PATCH 11/14] dt-bindings: leds: mt6370: Add Mediatek mt6370 indicator documentation

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Date:   Tue, 31 May 2022 22:38:31 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     ChiaEn Wu <peterwu.pub@...il.com>, lee.jones@...aro.org,
        daniel.thompson@...aro.org, jingoohan1@...il.com, pavel@....cz,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        matthias.bgg@...il.com, sre@...nel.org, chunfeng.yun@...iatek.com,
        gregkh@...uxfoundation.org, jic23@...nel.org, lars@...afoo.de,
        lgirdwood@...il.com, broonie@...nel.org, linux@...ck-us.net,
        heikki.krogerus@...ux.intel.com, deller@....de
Cc:     cy_huang@...htek.com, alice_chen@...htek.com,
        chiaen_wu@...htek.com, dri-devel@...ts.freedesktop.org,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-usb@...r.kernel.org,
        linux-iio@...r.kernel.org, linux-fbdev@...r.kernel.org
Subject: Re: [PATCH 11/14] dt-bindings: leds: mt6370: Add Mediatek mt6370
 indicator documentation

On 31/05/2022 12:42, ChiaEn Wu wrote:
> From: ChiYuan Huang <cy_huang@...htek.com>
> 
> Add Mediatek mt6370 indicator documentation.
> 
> Signed-off-by: ChiYuan Huang <cy_huang@...htek.com>
> ---
>  .../leds/mediatek,mt6370-indicator.yaml       | 57 +++++++++++++++++++
>  1 file changed, 57 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml
> 
> diff --git a/Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml b/Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml
> new file mode 100644
> index 000000000000..823be3add097
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/mediatek,mt6370-indicator.yaml
> @@ -0,0 +1,57 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/leds/mediatek,mt6370-indicator.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: LED driver for MT6370 PMIC from MediaTek Integrated.
> +
> +maintainers:
> +  - Alice Chen <alice_chen@...htek.com>
> +
> +description: |
> +  This module is part of the MT6370 MFD device.
> +  see Documentation/devicetree/bindings/mfd/mediatek,mt6370.yaml
> +  Add MT6370 LED driver include 4-channel RGB LED support Register/PWM/Breath Mode
> +
> +properties:
> +  compatible:
> +    const: mediatek,mt6370-indicator
> +
> +  "#address-cells":
> +    const: 1
> +
> +  "#size-cells":
> +    const: 0
> +
> +patternProperties:
> +  "^(multi-)?led@[0-3]$":
> +    description: |
> +      Properties for a single LED.

Not useful description. Just skip it, I think schema allows it.

> +    $ref: common.yaml#
> +    type: object
> +
> +    properties:
> +      reg:
> +        description: |
> +          Index of the LED.

The same, regs are usually not described.

> +        enum:
> +          - 0 # LED output ISINK1
> +          - 1 # LED output ISINK2
> +          - 2 # LED output ISINK3
> +          - 3 # LED output ISINK4
> +
> +      mediatek,soft-start:
> +        description: |
> +          soft start step control, support /0.5ms/1ms/1.5ms/2ms.

Why here you start sentence lower-case?

> +        $ref: /schemas/types.yaml#/definitions/uint32
> +        enum: [0, 1, 2, 3]

This has to be in logical values, so in ms, not in some register values.
Use proper unit suffix and enumerate the actual values.

> +
> +    unevaluatedProperties: false
> +
> +required:
> +  - compatible
> +  - "#address-cells"
> +  - "#size-cells"
> +
> +additionalProperties: false


Best regards,
Krzysztof