Re: [PATCH v5 1/4] dt-bindings: mfd: ti,tps6594: add TPS6594 PMIC support

[Rob Herring <robh@kernel.org>]

On Tue, Nov 22, 2022 at 09:35:09PM -0800, Matt Ranostay wrote:
> Add documentation for the TPS6594 PMIC including its RTC and GPIO
> functionalities.
> 
> Signed-off-by: Matt Ranostay <mranostay@ti.com>
> ---
>  .../devicetree/bindings/mfd/ti,tps6594.yaml   | 69 +++++++++++++++++++
>  1 file changed, 69 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
> 
> diff --git a/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml b/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
> new file mode 100644
> index 000000000000..0de0db87dbf7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/ti,tps6594.yaml
> @@ -0,0 +1,69 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mfd/ti,tps6594.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: TPS6594 Power Management Integrated Circuit (PMIC)
> +
> +description: |
> +  TPS6594 Power Management Integrated Circuit (PMIC)
> +  https://www.ti.com/lit/ds/symlink/tps6594-q1.pdf

Normally a PMIC has some regulators...

> +
> +maintainers:
> +  - Keerthy <j-keerthy@ti.com>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - ti,tps6594
> +
> +  reg:
> +    const: 0x48
> +
> +  ti,system-power-controller:
> +    type: boolean
> +    description: PMIC is controlling the system power.
> +
> +  rtc:
> +    type: object
> +    $ref: /schemas/rtc/rtc.yaml#
> +    unevaluatedProperties: false
> +    properties:
> +      compatible:
> +        const: ti,tps6594-rtc
> +
> +  gpio:
> +    type: object
> +    unevaluatedProperties: false
> +    properties:
> +      compatible:
> +        const: ti,tps6594-gpio

GPIO, but not using the GPIO binding?

As Krzysztof pointed out, none of this needs child nodes. You have them 
just for convenience of instantiating Linux drivers.

> +
> +additionalProperties: false
> +
> +required:
> +  - compatible
> +  - reg
> +
> +examples:
> +  - |
> +    i2c0 {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        pmic: pmic@48 {
> +            compatible = "ti,tps6594";
> +            reg = <0x48>;
> +
> +            rtc {
> +                compatible = "ti,tps6594-rtc";
> +            };
> +
> +            gpio {
> +                compatible = "ti,tps6594-gpio";
> +            };
> +        };
> +    };
> +
> +...
> -- 
> 2.38.GIT
> 
>