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SubjectRe: [PATCH v6 1/2] Add DT bindings YAML schema for PWM fan controller of LGM SoC
On Tue, Jul 28, 2020 at 04:52:12PM +0800, Rahul Tanwar wrote:
> Intel's LGM(Lightning Mountain) SoC contains a PWM fan controller
> which is only used to control the fan attached to the system. This
> PWM controller does not have any other consumer other than fan.
> Add DT bindings documentation for this PWM fan controller.
>
> Signed-off-by: Rahul Tanwar <rahul.tanwar@linux.intel.com>
> ---
> .../devicetree/bindings/pwm/intel,lgm-pwm.yaml | 54 ++++++++++++++++++++++
> 1 file changed, 54 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pwm/intel,lgm-pwm.yaml
>
> diff --git a/Documentation/devicetree/bindings/pwm/intel,lgm-pwm.yaml b/Documentation/devicetree/bindings/pwm/intel,lgm-pwm.yaml
> new file mode 100644
> index 000000000000..9879972470dc
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/intel,lgm-pwm.yaml
> @@ -0,0 +1,54 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pwm/intel,lgm-pwm.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: LGM SoC PWM fan controller
> +
> +maintainers:
> + - Rahul Tanwar <rahul.tanwar@intel.com>
> +
> +properties:
> + compatible:
> + const: intel,lgm-pwm
> +
> + reg:
> + maxItems: 1
> +
> + "#pwm-cells":
> + const: 2
> +
> + clocks:
> + maxItems: 1
> +
> + resets:
> + maxItems: 1
> +
> + intel,fan-wire:
> + $ref: '/schemas/types.yaml#/definitions/uint32'
> + description: Specifies fan mode. Default when unspecified is 2.
> +
> + intel,max-rpm:
> + $ref: '/schemas/types.yaml#/definitions/uint32'
> + description:
> + Specifies maximum RPM of fan attached to the system.
> + Default when unspecified is 4000.

Again, these are properties of a fan, not the pwm controller. They
belong in a fan node.

> +
> ++required:
> + - compatible
> + - reg
> + - clocks
> + - resets
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + pwm: pwm@e0d00000 {
> + compatible = "intel,lgm-pwm";
> + reg = <0xe0d00000 0x30>;
> + #pwm-cells = <2>;
> + clocks = <&cgu0 126>;
> + resets = <&rcu0 0x30 21>;
> + };
> --
> 2.11.0
>

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