linux-kernel - Re: [PATCH] dt-bindings: pinctrl: uniphier: Add child node definitions to describe pin mux and configuration

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Date:   Wed, 27 Oct 2021 14:56:03 +0900
From:   Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
To:     Rob Herring <robh@...nel.org>
Cc:     Linus Walleij <linus.walleij@...aro.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: pinctrl: uniphier: Add child node
 definitions to describe pin mux and configuration

Hi Rob,
Thank you for your comment,

On 2021/10/27 5:31, Rob Herring wrote:
> On Wed, Oct 13, 2021 at 11:54:08PM +0900, Kunihiko Hayashi wrote:
>> In arch/arm/boot/dts/uniphier-pinctrl.dtsi, there are child nodes of
>> pinctrl that defines pinmux and pincfg, however, there are no rules
> about
>> that in dt-bindings.
>>
>> 'make dtbs_check' results an error with the following message:
>>
>>     pinctrl: 'ain1', 'ain2', 'ainiec1', 'aout', 'aout1', 'aout2', ...
>>     ... 'usb2', 'usb3' do not match any of the regexes: 'pinctrl-[0-9]+'
>>
>> To avoid this issue, add the rules of pinmux and pincfg in each child
> node
>> and grandchild node.
>>
>> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
>> ---
>>   .../pinctrl/socionext,uniphier-pinctrl.yaml        | 46
> +++++++++++++++++++++-
>>   1 file changed, 44 insertions(+), 2 deletions(-)
>>
>> diff --git
> a/Documentation/devicetree/bindings/pinctrl/socionext,uniphier-pinctrl.yam
> l
> b/Documentation/devicetree/bindings/pinctrl/socionext,uniphier-pinctrl.yam
> l
>> index a804d9bc1602..4567330fe536 100644
>> ---
> a/Documentation/devicetree/bindings/pinctrl/socionext,uniphier-pinctrl.yam
> l
>> +++
> b/Documentation/devicetree/bindings/pinctrl/socionext,uniphier-pinctrl.yam
> l
>> @@ -26,11 +26,53 @@ properties:
>>         - socionext,uniphier-pxs3-pinctrl
>>         - socionext,uniphier-nx1-pinctrl
>>   
>> -required:
>> -  - compatible
>> +patternProperties:
>> +  "^.*$":
>> +    if:
>> +      type: object
>> +    then:
> 
> After coming up with this hack, I found a better way using
> additionalProperties:
> 
> additionalProperties:
>    type: object

I see. I'll add it next.

> and then all this:
> 
>> +      allOf:
>> +        - $ref: pincfg-node.yaml#
>> +        - $ref: pinmux-node.yaml#
>> +
>> +      properties:
>> +        phandle: true
>> +        function: true
>> +        groups: true
>> +        pins: true
>> +        bias-pull-up: true
>> +        bias-pull-down: true
>> +        bias-pull-pin-default: true
>> +        drive-strength: true
>> +
>> +      patternProperties:
>> +        "^.*$":
>> +          if:
>> +            type: object
>> +          then:
> 
> Same thing here.

Yes. I'll add it, too.

Thank you,

---
Best Regards
Kunihiko Hayashi