linux-kernel - Re: [PATCH 2/2] dt-bindings: leds: Add bindings for MT6360 LED

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Date:   Tue, 1 Sep 2020 11:42:38 +0800
From:   Gene Chen <gene.chen.richtek@...il.com>
To:     Dan Murphy <dmurphy@...com>
Cc:     jacek.anaszewski@...il.com, pavel@....cz,
        Matthias Brugger <matthias.bgg@...il.com>,
        linux-leds@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Gene Chen <gene_chen@...htek.com>, Wilma.Wu@...iatek.com,
        shufan_lee@...htek.com, cy_huang@...htek.com,
        benjamin.chao@...iatek.com
Subject: Re: [PATCH 2/2] dt-bindings: leds: Add bindings for MT6360 LED

Dan Murphy <dmurphy@...com> 於 2020年8月26日 週三 下午7:54寫道：
>
> Gene
>
> On 8/26/20 6:37 AM, Gene Chen wrote:
> > From: Gene Chen <gene_chen@...htek.com>
> >
> > Add bindings document for LED support on MT6360 PMIC
>
> Usually bindings are 1/x in the patchset.
>

ACK

> And you should cc Rob Herring and the Device tree mail list other wise
> the maintainer will not apply this patch without their ACKs
>
>

ACK

> > Signed-off-by: Gene Chen <gene_chen@...htek.com>
> > ---
> >   .../devicetree/bindings/leds/leds-mt6360.yaml      | 50 ++++++++++++++++++++++
> >   1 file changed, 50 insertions(+)
> >   create mode 100644 Documentation/devicetree/bindings/leds/leds-mt6360.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/leds/leds-mt6360.yaml b/Documentation/devicetree/bindings/leds/leds-mt6360.yaml
> > new file mode 100644
> > index 0000000..4598be5
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/leds/leds-mt6360.yaml
> > @@ -0,0 +1,50 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/leds/leds-mt6360.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: LED driver for MT6360 PMIC from MediaTek Integrated.
> > +
> > +maintainers:
> > +  - Gene Chen <gene_chen@...htek.com>
> > +
> > +description: |
> > +  This module is part of the MT6360 MFD device. For more details
> > +  see Documentation/devicetree/bindings/mfd/mt6360.yaml.
>
> I think you need to include this yaml using allof tag
>
>

I try add allOf tag
allOf:
 - $ref: "../mfd/mt6360.yaml"

then the required property contains mt6360.yaml, which leads to build dt error.
/media/gene_chen/WD/upstream/linux/Documentation/devicetree/bindings/leds/leds-mt6360.example.dt.yaml:
led-controller: 'reg' is a required property
/media/gene_chen/WD/upstream/linux/Documentation/devicetree/bindings/leds/leds-mt6360.example.dt.yaml:
led-controller: 'interrupt-controller' is a required property
/media/gene_chen/WD/upstream/linux/Documentation/devicetree/bindings/leds/leds-mt6360.example.dt.yaml:
led-controller: '#interrupt-cells' is a required property
/media/gene_chen/WD/upstream/linux/Documentation/devicetree/bindings/leds/leds-mt6360.example.dt.yaml:
led-controller: compatible:0: 'mediatek,mt6360' was expected

I think I can remove this description for misread.

> > +
> > +  The LED controller is represented as a sub-node of the PMIC node on
> > +  the device tree.
> > +
> > +  This device has six current sinks.
> > +
> > +properties:
> > +  compatible:
> > +    const: mediatek,mt6360-led
> > +
> > +  "#address-cells":
> > +    const: 1
> > +
> > +  "#size-cells":
> > +    const: 0
> > +
> > +patternProperties:
> > +  "^led@[0-5]$":
> > +    type: object
> > +    description: |
> > +      Properties for a single LED.
> > +
> > +    properties:
> > +      reg:
> > +        description:
> > +          Index of the LED.
> > +        minimum: 0
> > +        maximum: 5
> > +
> > +required:
> > +  - compatible
> > +  - "#address-cells"
> > +  - "#size-cells"
> > +additionalProperties: false
> > +
> Need a new line
>
>
> And an example
>
> > +...