[PATCH v8 3/4] dt-bindings: pwm: add IPQ6018 binding

[Rob Herring]

On Mon, Aug 30, 2021 at 02:46:26PM +0300, Baruch Siach wrote:
> DT binding for the PWM block in Qualcomm IPQ6018 SoC.
> 
> Signed-off-by: Baruch Siach <baruch at tkos.co.il>
> ---
> This series does not convert the TCSR binding documentation to YAML. As
> a result, this commit adds new a dt_binding_check warning:
> 
> /example-0/syscon at 1937000: failed to match any schema with compatible: ['qcom,tcsr-ipq 6018', 'syscon', 'simple-mfd']
> 
> If that is a blocker to IPQ6018 PWM support, so be it. Patches will wait
> for someone else to push them further.
> 
> v8:
> 
>   Add size cell to 'reg' (Rob)
> 
> v7:
> 
>   Use 'reg' instead of 'offset' (Rob)
> 
>   Drop 'clock-names' and 'assigned-clock*' (Bjorn)
> 
>   Use single cell address/size in example node (Bjorn)
> 
>   Move '#pwm-cells' lower in example node (Bjorn)
> 
>   List 'reg' as required
> 
> v6:
> 
>   Device node is child of TCSR; remove phandle (Rob Herring)
> 
>   Add assigned-clocks/assigned-clock-rates (Uwe Kleine-König)
> 
> v5: Use qcom,pwm-regs for phandle instead of direct regs (Bjorn
>     Andersson, Kathiravan T)
> 
> v4: Update the binding example node as well (Rob Herring's bot)
> 
> v3: s/qcom,pwm-ipq6018/qcom,ipq6018-pwm/ (Rob Herring)
> 
> v2: Make #pwm-cells const (Rob Herring)
> ---
>  .../devicetree/bindings/pwm/ipq-pwm.yaml      | 52 +++++++++++++++++++
>  1 file changed, 52 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pwm/ipq-pwm.yaml
> 
> diff --git a/Documentation/devicetree/bindings/pwm/ipq-pwm.yaml b/Documentation/devicetree/bindings/pwm/ipq-pwm.yaml
> new file mode 100644
> index 000000000000..96bc63e336bf
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/ipq-pwm.yaml
> @@ -0,0 +1,52 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pwm/ipq-pwm.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Qualcomm IPQ6018 PWM controller
> +
> +maintainers:
> +  - Baruch Siach <baruch at tkos.co.il>
> +
> +properties:
> +  "#pwm-cells":
> +    const: 2
> +
> +  compatible:
> +    const: qcom,ipq6018-pwm
> +
> +  reg:
> +    description: Offset of PWM register in the TCSR block.
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - "#pwm-cells"
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/qcom,gcc-ipq6018.h>
> +
> +    tcsr: syscon at 1937000 {

Drop unused (by the example) labels.

> +        compatible = "qcom,tcsr-ipq6018", "syscon", "simple-mfd";
> +        reg = <0x01937000 0x21000>;
> +        #address-cells = <1>;
> +        #size-cells = <1>;

           ranges = <0 0x1937000 0x21000>;

Otherwise, the address is not translatable.

> +
> +        pwm: pwm at a010 {
> +            compatible = "qcom,ipq6018-pwm";
> +            reg = <0xa010 0x20>;
> +            clocks = <&gcc GCC_ADSS_PWM_CLK>;
> +            assigned-clocks = <&gcc GCC_ADSS_PWM_CLK>;
> +            assigned-clock-rates = <100000000>;
> +            #pwm-cells = <2>;
> +        };
> +    };
> -- 
> 2.33.0
> 
>