linux-kernel - Re: [PATCH v2 1/8] dt-bindings: pinctrl: mvebu: Document bindings for AC5

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Date:   Tue, 15 Mar 2022 11:46:59 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Chris Packham <chris.packham@...iedtelesis.co.nz>,
        huziji@...vell.com, ulf.hansson@...aro.org, robh+dt@...nel.org,
        davem@...emloft.net, kuba@...nel.org, linus.walleij@...aro.org,
        catalin.marinas@....com, will@...nel.org, andrew@...n.ch,
        gregory.clement@...tlin.com, sebastian.hesselbarth@...il.com,
        adrian.hunter@...el.com, thomas.petazzoni@...tlin.com,
        kostap@...vell.com, robert.marko@...tura.hr
Cc:     linux-mmc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-gpio@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 1/8] dt-bindings: pinctrl: mvebu: Document bindings for
 AC5

On 14/03/2022 22:31, Chris Packham wrote:
> Add JSON schema for marvell,ac5-pinctrl present on the Marvell 98DX2530
> SoC.
> 
> Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
> ---
> 
> Notes:
>     Changes in v2:
>     - Remove syscon and simple-mfd compatibles
> 
>  .../bindings/pinctrl/marvell,ac5-pinctrl.yaml | 70 +++++++++++++++++++
>  1 file changed, 70 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pinctrl/marvell,ac5-pinctrl.yaml
> 
> diff --git a/Documentation/devicetree/bindings/pinctrl/marvell,ac5-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/marvell,ac5-pinctrl.yaml
> new file mode 100644
> index 000000000000..65af1d5f5fe0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pinctrl/marvell,ac5-pinctrl.yaml
> @@ -0,0 +1,70 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pinctrl/marvell,ac5-pinctrl.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Marvell AC5 pin controller
> +
> +maintainers:
> +  - Chris Packham <chris.packham@...iedtelesis.co.nz>
> +
> +description:
> +  Bindings for Marvell's AC5 memory-mapped pin controller.
> +
> +properties:
> +  compatible:
> +    const: marvell,ac5-pinctrl
> +
> +patternProperties:
> +  '-pins$':
> +    type: object
> +    $ref: pinmux-node.yaml#
> +
> +    properties:
> +      marvell,function:
> +        $ref: "/schemas/types.yaml#/definitions/string"
> +        description:
> +          Indicates the function to select.
> +        enum: [ gpio, i2c0, i2c1, nand, sdio, spi0, spi1, uart0, uart1, uart2, uart3 ]
> +
> +      marvell,pins:
> +        $ref: /schemas/types.yaml#/definitions/string-array
> +        description:
> +          Array of MPP pins to be used for the given function.
> +        minItems: 1
> +        items:
> +          enum: [ mpp0, mpp1, mpp2, mpp3, mpp4, mpp5, mpp6, mpp7, mpp8, mpp9,
> +                  mpp10, mpp11, mpp12, mpp13, mpp14, mpp15, mpp16, mpp17, mpp18, mpp19,
> +                  mpp20, mpp21, mpp22, mpp23, mpp24, mpp25, mpp26, mpp27, mpp28, mpp29,
> +                  mpp30, mpp31, mpp32, mpp33, mpp34, mpp35, mpp36, mpp37, mpp38, mpp39,
> +                  mpp40, mpp41, mpp42, mpp43, mpp44, mpp45 ]
> +
> +allOf:
> +  - $ref: "pinctrl.yaml#"
> +
> +required:
> +  - compatible
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    system-controller@...20100 {
> +      compatible = "syscon", "simple-mfd";
> +      reg = <0x80020000 0x20>;

This is unusual. Usually the pinctrl should be a device @80020100, not
child of syscon node. Why do you need it? In v1 you mentioned that
vendor sources do like this, but it's not correct to copy wrong DTS. :)



Best regards,
Krzysztof