linux-kernel - Re: [PATCH v1 03/12] dt-bindings: pinctrl: add i.MXRT1170 pinctrl Documentation

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Message-ID: <2af35b48-c49d-3a76-256b-c31d2650ed39@kernel.org>
Date:   Sun, 27 Mar 2022 21:08:46 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Jesse Taube <mr.bossman075@...il.com>, linux-imx@....com
Cc:     robh+dt@...nel.org, mturquette@...libre.com, sboyd@...nel.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, aisheng.dong@....com, stefan@...er.ch,
        linus.walleij@...aro.org, daniel.lezcano@...aro.org,
        tglx@...utronix.de, arnd@...db.de, olof@...om.net, soc@...nel.org,
        linux@...linux.org.uk, abel.vesa@....com, dev@...xeye.de,
        marcel.ziswiler@...adex.com, tharvey@...eworks.com,
        leoyang.li@....com, sebastian.reichel@...labora.com,
        cniedermaier@...electronics.com, clin@...e.com,
        giulio.benetti@...ettiengineering.com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org
Subject: Re: [PATCH v1 03/12] dt-bindings: pinctrl: add i.MXRT1170 pinctrl
 Documentation

On 26/03/2022 15:43, Jesse Taube wrote:
> Add i.MXRT1170 pinctrl binding Documentation
> 
> Cc: Giulio Benetti <giulio.benetti@...ettiengineering.com>
> Signed-off-by: Jesse Taube <Mr.Bossman075@...il.com>
> ---
>  .../bindings/pinctrl/fsl,imxrt1170.yaml       | 77 +++++++++++++++++++
>  1 file changed, 77 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pinctrl/fsl,imxrt1170.yaml
> 
> diff --git a/Documentation/devicetree/bindings/pinctrl/fsl,imxrt1170.yaml b/Documentation/devicetree/bindings/pinctrl/fsl,imxrt1170.yaml
> new file mode 100644
> index 000000000000..2e880b3e537c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pinctrl/fsl,imxrt1170.yaml
> @@ -0,0 +1,77 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pinctrl/fsl,imxrt1170.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale i.MXRT1170 IOMUX Controller
> +
> +maintainers:
> +  - Giulio Benetti <giulio.benetti@...ettiengineering.com>
> +  - Jesse Taube <Mr.Bossman075@...il.com>
> +
> +description:
> +  Please refer to fsl,imx-pinctrl.txt and pinctrl-bindings.txt in this directory
> +  for common binding part and usage.
> +
> +properties:
> +  compatible:
> +    const: fsl,imxrt1170-iomuxc
> +
> +  reg:
> +    maxItems: 1
> +
> +# Client device subnode's properties
> +patternProperties:
> +  'grp$':
> +    type: object
> +    description:
> +      Pinctrl node's client devices use subnodes for desired pin configuration.
> +      Client device subnodes use below standard properties.
> +
> +    properties:
> +      fsl,pins:
> +        description:
> +          each entry consists of 6 integers and represents the mux and config
> +          setting for one pin. The first 5 integers <mux_reg conf_reg input_reg
> +          mux_val input_val> are specified using a PIN_FUNC_ID macro, which can
> +          be found in <arch/arm/boot/dts/imxrt1170-pinfunc.h>. The last
> +          integer CONFIG is the pad setting value like pull-up on this pin. Please
> +          refer to i.MXRT1170 Reference Manual for detailed CONFIG settings.
> +        $ref: /schemas/types.yaml#/definitions/uint32-matrix
> +        items:
> +          items:
> +            - description: |
> +                "mux_reg" indicates the offset of mux register.
> +            - description: |
> +                "conf_reg" indicates the offset of pad configuration register.
> +            - description: |
> +                "input_reg" indicates the offset of select input register.
> +            - description: |
> +                "mux_val" indicates the mux value to be applied.
> +            - description: |
> +                "input_val" indicates the select input value to be applied.
> +            - description: |
> +                "pad_setting" indicates the pad configuration value to be applied.
> +    required:
> +      - fsl,pins
> +
> +    additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg

You miss pinctrl.yaml, why?

> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    iomuxc: iomuxc@...e8000 {
> +        compatible = "fsl,imxrt1170-iomuxc";
> +        reg = <0x400e8000 0x4000>;
> +        pinctrl_lpuart1: lpuart1grp {
> +            fsl,pins =
> +              <0x16C 0x3B0 0x620 0x0 0x0  0xf1>,
> +              <0x170 0x3B4 0x61C 0x0 0x0	0xf1>;
> +        };
> +    };


Best regards,
Krzysztof