linux-kernel - Re: [PATCH v2 1/2] spi: dt-bindings: amlogic, meson-gx-spicc: Add pinctrl names for SPI signal states

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Message-ID: <d2ce98d7-1025-9c6e-e207-00e91942077a@linaro.org>
Date:   Wed, 5 Oct 2022 10:14:11 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Amjad Ouled-Ameur <aouledameur@...libre.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Da Xue <da@...re.computer>, linux-kernel@...r.kernel.org,
        linux-spi@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 1/2] spi: dt-bindings: amlogic, meson-gx-spicc: Add
 pinctrl names for SPI signal states

On 04/10/2022 13:10, Amjad Ouled-Ameur wrote:
> SPI pins of the SPICC Controller in Meson-GX needs to be controlled by
> pin biais when idle. Therefore define three pinctrl names:
> - default: SPI pins are controlled by spi function.
> - idle-high: SCLK pin is pulled-up, but MOSI/MISO are still controlled
> by spi function.
> - idle-low: SCLK pin is pulled-down, but MOSI/MISO are still controlled
> by spi function.
> 
> Reported-by: Da Xue <da@...re.computer>
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> Signed-off-by: Amjad Ouled-Ameur <aouledameur@...libre.com>
> ---
>  .../devicetree/bindings/spi/amlogic,meson-gx-spicc.yaml   | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/spi/amlogic,meson-gx-spicc.yaml b/Documentation/devicetree/bindings/spi/amlogic,meson-gx-spicc.yaml
> index 0c10f7678178..53013e27f507 100644
> --- a/Documentation/devicetree/bindings/spi/amlogic,meson-gx-spicc.yaml
> +++ b/Documentation/devicetree/bindings/spi/amlogic,meson-gx-spicc.yaml
> @@ -43,6 +43,14 @@ properties:
>      minItems: 1
>      maxItems: 2
>  
> +  pinctrl-0:
> +    minItems: 1

maxItems?

> +
> +  pinctrl-1:
> +    maxItems: 1
> +
> +  pinctrl-names: true

Why do you need all these in the bindings?

> +
>  if:
>    properties:
>      compatible:
> @@ -69,6 +77,13 @@ else:
>        items:
>          - const: core
>  
> +    pinctrl-names:
> +      minItems: 1
> +      items:
> +        - const: default
> +        - const: idle-high
> +        - const: idle-low

This does not match what you wrote in the bindings - you mentioned only
two set of pin controls.


Best regards,
Krzysztof