linux-kernel - Re: [PATCH V12 2/3] dt-bindings: pwm: add IPQ6018 binding

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Date:   Mon, 25 Sep 2023 09:11:48 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Devi Priya <quic_devipriy@...cinc.com>, thierry.reding@...il.com,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, agross@...nel.org, andersson@...nel.org,
        konrad.dybcio@...aro.org, ndesaulniers@...gle.com, trix@...hat.com,
        baruch@...s.co.il, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        llvm@...ts.linux.dev
Cc:     linux-pwm@...r.kernel.org, u.kleine-koenig@...gutronix.de,
        nathan@...nel.org
Subject: Re: [PATCH V12 2/3] dt-bindings: pwm: add IPQ6018 binding

On 25/09/2023 08:59, Devi Priya wrote:
> DT binding for the PWM block in Qualcomm IPQ6018 SoC.
> 
> Reviewed-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> Co-developed-by: Baruch Siach <baruch.siach@...lu.com>
> Signed-off-by: Baruch Siach <baruch.siach@...lu.com>
> Signed-off-by: Devi Priya <quic_devipriy@...cinc.com>

...

> diff --git a/Documentation/devicetree/bindings/pwm/ipq-pwm.yaml b/Documentation/devicetree/bindings/pwm/ipq-pwm.yaml
> new file mode 100644
> index 000000000000..857086ad539e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/ipq-pwm.yaml

Filename matching compatible, so qcom,ipq6018-pwm.yaml

> @@ -0,0 +1,53 @@
> +# 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@...s.co.il>
> +
> +properties:
> +  "#pwm-cells":
> +    const: 2
> +
> +  compatible:
> +    const: qcom,ipq6018-pwm

compatible is always the first property.

> +
> +  reg:
> +    description: Offset of PWM register in the TCSR block.
> +    maxItems: 1
> +
> +  clocks:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - "#pwm-cells"

And this order must be the same as in properties.

> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/qcom,gcc-ipq6018.h>
> +
> +    syscon@...7000 {
> +        compatible = "qcom,tcsr-ipq6018", "syscon", "simple-mfd";
> +        reg = <0x01937000 0x21000>;
> +        #address-cells = <1>;
> +        #size-cells = <1>;
> +        ranges = <0 0x1937000 0x21000>;

Drop this node, not related. The parent binding could have full example,
on the other hand. Additionally, I have doubts that you really tested
the parent binding.

> +
> +        pwm: pwm@...0 {
> +            compatible = "qcom,ipq6018-pwm";

Best regards,
Krzysztof