Re: [PATCH v3 6/7] dt-bindings: gpio: Add bindings for pinctrl based generic gpio driver

[Rob Herring <robh@kernel.org>]

On Wed, Mar 11, 2026 at 10:39:17PM +0300, Dan Carpenter wrote:
> From: AKASHI Takahiro <takahiro.akashi@linaro.org>
> 
> Add a dt binding for the gpio-by-pinctrl driver.  The driver is used
> for doing GPIO over the SCMI pinctrl protocol.  There are a few
> mandatory properties such as gpio-ranges and ngpios, but it's not
> mandatory to specify the pin-mux.
> 
> Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
> Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
> ---
>  .../bindings/gpio/pin-control-gpio.yaml       | 70 +++++++++++++++++++
>  1 file changed, 70 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/gpio/pin-control-gpio.yaml
> 
> diff --git a/Documentation/devicetree/bindings/gpio/pin-control-gpio.yaml b/Documentation/devicetree/bindings/gpio/pin-control-gpio.yaml
> new file mode 100644
> index 000000000000..81c68579df6e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/pin-control-gpio.yaml
> @@ -0,0 +1,70 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/gpio/pin-control-gpio.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Pin control based generic GPIO controller
> +
> +description:
> +  The pin control-based GPIO will facilitate a pin controller's ability
> +  to drive electric lines high/low and other generic properties of a
> +  pin controller to perform general-purpose one-bit binary I/O.
> +
> +maintainers:
> +  - Dan Carpenter <dan.carpenter@linaro.og>
> +
> +properties:
> +  compatible:
> +    const: scmi-pinctrl-gpio
> +
> +  gpio-controller: true
> +
> +  "#gpio-cells":
> +    const: 2
> +
> +  gpio-ranges: true
> +
> +  ngpios: true
> +
> +patternProperties:
> +  "^.+-hog(-[0-9]+)?$":
> +    type: object
> +
> +    required:
> +      - gpio-hog
> +
> +required:
> +  - compatible
> +  - gpio-controller
> +  - "#gpio-cells"
> +  - gpio-ranges
> +  - ngpios
> +
> +additionalProperties: true

That's only valid for common (incomplete) schemas. It must be false.

> +
> +examples:
> +  - |
> +    gpio1 {
> +        compatible = "scmi-pinctrl-gpio";
> +        gpio-controller;
> +        #gpio-cells = <2>;
> +        ngpios = <10>;
> +        gpio-ranges = <&scmi_pinctrl 0 8 4>,
> +                      <&scmi_pinctrl 4 12 1>,
> +                      <&scmi_pinctrl 5 15 1>,
> +                      <&scmi_pinctrl 6 17 4>;
> +        pinctrl-names = "default";
> +        pinctrl-0 = <&i2c2_pins>;
> +    };
> +
> +    gpio2 {
> +        compatible = "scmi-pinctrl-gpio";
> +        gpio-controller;
> +        #gpio-cells = <2>;
> +        ngpios = <3>;
> +        gpio-line-names = "gpio_5_17", "gpio_5_20", "gpio_5_22", "gpio_2_1";
> +        gpio-ranges = <&scmi_pinctrl 0 30 4>;
> +        pinctrl-names = "default";
> +        pinctrl-0 = <&keys_pins>;
> +    };

I think 1 example is enough.

> -- 
> 2.51.0
>