linux-kernel - Re: [PATCH 05/10] dt-bindings: gpio: Add AXP192 GPIO bindings

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Date:   Sun, 5 Jun 2022 17:55:04 -0500
From:   Rob Herring <robh@...nel.org>
To:     Aidan MacDonald <aidanmacdonald.0x0@...il.com>
Cc:     linus.walleij@...aro.org, brgl@...ev.pl,
        krzysztof.kozlowski+dt@...aro.org, wens@...e.org, jic23@...nel.org,
        lee.jones@...aro.org, sre@...nel.org, broonie@...nel.org,
        gregkh@...uxfoundation.org, lgirdwood@...il.com, lars@...afoo.de,
        rafael@...nel.org, linux-gpio@...r.kernel.org,
        devicetree@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 05/10] dt-bindings: gpio: Add AXP192 GPIO bindings

On Fri, Jun 03, 2022 at 02:57:09PM +0100, Aidan MacDonald wrote:
> The AXP192 PMIC is different enough from the PMICs supported by
> the AXP20x GPIO driver to warrant a separate driver. The AXP192
> driver also supports interrupts and pinconf settings.
> 
> Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@...il.com>
> ---
>  .../bindings/gpio/x-powers,axp192-gpio.yaml   | 59 +++++++++++++++++++
>  1 file changed, 59 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/gpio/x-powers,axp192-gpio.yaml
> 
> diff --git a/Documentation/devicetree/bindings/gpio/x-powers,axp192-gpio.yaml b/Documentation/devicetree/bindings/gpio/x-powers,axp192-gpio.yaml
> new file mode 100644
> index 000000000000..7a985640ade8
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/gpio/x-powers,axp192-gpio.yaml
> @@ -0,0 +1,59 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: "http://devicetree.org/schemas/gpio/x-powers,axp192-gpio.yaml#"
> +$schema: "http://devicetree.org/meta-schemas/core.yaml#"
> +
> +title: X-Powers AXP192 GPIO Device Tree Bindings
> +
> +maintainers:
> +  - Chen-Yu Tsai <wens@...e.org>
> +
> +properties:
> +  "#gpio-cells":
> +    const: 2
> +    description: >
> +      The first cell is the pin number and the second is the GPIO flags.
> +
> +  compatible:
> +    oneOf:
> +      - enum:

No need for 'oneOf' with only 1 entry.

> +          - x-powers,axp192-gpio
> +
> +  gpio-controller: true
> +
> +patternProperties:
> +  "^.*-pins?$":

You can omit '^.*'

Why does 's' need to be optional?

> +    $ref: /schemas/pinctrl/pinmux-node.yaml#
> +
> +    properties:
> +      pins:
> +        items:
> +          enum:
> +            - GPIO0
> +            - GPIO1
> +            - GPIO2
> +            - GPIO3
> +            - GPIO4
> +            - N_RSTO
> +
> +      function:
> +        enum:
> +          - output
> +          - input
> +          - ldo
> +          - pwm
> +          - adc
> +          - low_output
> +          - floating
> +          - ext_chg_ctl
> +          - ldo_status
> +
> +required:
> +  - compatible
> +  - "#gpio-cells"
> +  - gpio-controller
> +
> +additionalProperties: false
> +
> +...
> -- 
> 2.35.1
> 
>