linux-kernel - Re: [PATCH v2 3/4] arm64: dts: nuvoton: Add pinctrl support for ma35d1

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Message-ID: <2fab32e6-23a4-41bb-b47b-4f993fc590dc@linaro.org>
Date:   Tue, 28 Nov 2023 12:06:15 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Jacky Huang <ychuang570808@...il.com>, linus.walleij@...aro.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, p.zabel@...gutronix.de, j.neuschaefer@....net
Cc:     linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        ychuang3@...oton.com, schung@...oton.com
Subject: Re: [PATCH v2 3/4] arm64: dts: nuvoton: Add pinctrl support for
 ma35d1

On 28/11/2023 11:45, Jacky Huang wrote:
> Dear Krzysztof,
> 
> Thanks for your review.
> 
> On 2023/11/28 下午 05:34, Krzysztof Kozlowski wrote:
>> On 28/11/2023 09:37, Jacky Huang wrote:
>>>>> +			gpion: gpio@...40340 {
>>>>> +				reg = <0x340 0x40>;
>>>>> +				interrupts = <GIC_SPI  105 IRQ_TYPE_LEVEL_HIGH>;
>>>>> +				clocks = <&clk GPN_GATE>;
>>>>> +				gpio-controller;
>>>>> +				#gpio-cells = <2>;
>>>>> +				interrupt-controller;
>>>>> +				#interrupt-cells = <2>;
>>>>> +			};
>>>>> +
>>>>> +			pcfg_default: pin-default {
>>>>> +				slew-rate = <0>;
>>>>> +				input-schmitt-disable;
>>>>> +				bias-disable;
>>>>> +				power-source = <1>;
>>>>> +				drive-strength = <17100>;
>>>>> +			};
>>>> It does not look like you tested the DTS against bindings. Please run
>>>> `make dtbs_check W=1` (see
>>>> Documentation/devicetree/bindings/writing-schema.rst or
>>>> https://www.linaro.org/blog/tips-and-tricks-for-validating-devicetree-sources-with-the-devicetree-schema/
>>>> for instructions).
>>>>
>>>> Best regards,
>>>> Krzysztof
>>>>
>>> I forgot to remove 'ma35d1-pinfunc.h' from my local copy.
>>> After remove the '#include <dt-bindings/pinctrl/ma35d1-pinfunc.h>', it
>>> can pass
>>> the `make dtbs_check W=1` check.
>>> I will fix it in the next version.
>> Really? Then your bindings look wrong. Why do you mix MMIO nodes and
>> non-MMIO in one device node?
>>
>> Best regards,
>> Krzysztof
>>
> 
> Yes, it did pass the 'dtbs_check'. I guess the tool does not detect such 
> issues.
> Anyway, I will fix it in the next version.

Hm, I see your bindings indeed allow pin-.* and unit addresses, so it is
the binding issue.

The examples you used as reference - xlnx,zynqmp-pinctrl.yaml and
realtek,rtd1315e-pinctrl.yaml - do not mix these as you do.

I don't understand why do you need them yet. I don't see any populate of
children. There are no compatibles, either.

Which part of your driver uses them exactly?

Best regards,
Krzysztof