linux-kernel - Re: [PATCH v8 2/4] dt-bindings: clock: Convert qcom,mmcc to DT schema

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Date:   Tue, 12 Nov 2019 09:11:16 -0700
From:   Jeffrey Hugo <jhugo@...eaurora.org>
To:     Rob Herring <robh@...nel.org>
Cc:     mturquette@...libre.com, sboyd@...nel.org, mark.rutland@....com,
        agross@...nel.org, bjorn.andersson@...aro.org,
        marc.w.gonzalez@...e.fr, linux-arm-msm@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v8 2/4] dt-bindings: clock: Convert qcom,mmcc to DT schema

On 11/11/2019 5:58 PM, Rob Herring wrote:
> On Fri, Nov 08, 2019 at 04:17:33PM -0700, Jeffrey Hugo wrote:
>> Convert the qcom,mmcc-X clock controller binding to DT schema.
>>
>> Signed-off-by: Jeffrey Hugo <jhugo@...eaurora.org>
>> ---
>>   .../devicetree/bindings/clock/qcom,mmcc.txt        | 28 ----------
>>   .../devicetree/bindings/clock/qcom,mmcc.yaml       | 59 ++++++++++++++++++++++
>>   2 files changed, 59 insertions(+), 28 deletions(-)
>>   delete mode 100644 Documentation/devicetree/bindings/clock/qcom,mmcc.txt
>>   create mode 100644 Documentation/devicetree/bindings/clock/qcom,mmcc.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/clock/qcom,mmcc.txt b/Documentation/devicetree/bindings/clock/qcom,mmcc.txt
>> deleted file mode 100644
>> index 8b0f784..0000000
>> --- a/Documentation/devicetree/bindings/clock/qcom,mmcc.txt
>> +++ /dev/null
>> @@ -1,28 +0,0 @@
>> -Qualcomm Multimedia Clock & Reset Controller Binding
>> -----------------------------------------------------
>> -
>> -Required properties :
>> -- compatible : shall contain only one of the following:
>> -
>> -			"qcom,mmcc-apq8064"
>> -			"qcom,mmcc-apq8084"
>> -			"qcom,mmcc-msm8660"
>> -			"qcom,mmcc-msm8960"
>> -			"qcom,mmcc-msm8974"
>> -			"qcom,mmcc-msm8996"
>> -
>> -- reg : shall contain base register location and length
>> -- #clock-cells : shall contain 1
>> -- #reset-cells : shall contain 1
>> -
>> -Optional properties :
>> -- #power-domain-cells : shall contain 1
>> -
>> -Example:
>> -	clock-controller@...0000 {
>> -		compatible = "qcom,mmcc-msm8960";
>> -		reg = <0x4000000 0x1000>;
>> -		#clock-cells = <1>;
>> -		#reset-cells = <1>;
>> -		#power-domain-cells = <1>;
>> -	};
>> diff --git a/Documentation/devicetree/bindings/clock/qcom,mmcc.yaml b/Documentation/devicetree/bindings/clock/qcom,mmcc.yaml
>> new file mode 100644
>> index 0000000..61ed4a2
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/clock/qcom,mmcc.yaml
>> @@ -0,0 +1,59 @@
>> +# SPDX-License-Identifier: GPL-2.0-only
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/bindings/clock/qcom,mmcc.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Qualcomm Multimedia Clock & Reset Controller Binding
>> +
>> +maintainers:
>> +  - Jeffrey Hugo <jhugo@...eaurora.org>
>> +
>> +description: |
>> +  Qualcomm multimedia clock control module which supports the clocks, resets and
>> +  power domains.
>> +
>> +properties:
>> +  compatible :
>> +    enum:
>> +       - qcom,mmcc-apq8064
>> +       - qcom,mmcc-apq8084
>> +       - qcom,mmcc-msm8660
>> +       - qcom,mmcc-msm8960
>> +       - qcom,mmcc-msm8974
>> +       - qcom,mmcc-msm8996
>> +
>> +  '#clock-cells':
>> +    const: 1
>> +
>> +  '#reset-cells':
>> +    const: 1
>> +
>> +  '#power-domain-cells':
>> +    const: 1
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  protected-clocks:
>> +    description:
>> +       Protected clock specifier list as per common clock binding
> 
> Wasn't documented before. Okay to add here, but mention it in the commit
> msg.

Its a generic property that applies to all providers.  In the non-yaml 
bindings, its was documented in the clock-binding.txt, thus implicitly 
documented for all the bindings.  That doesn't work in yaml, so I'm 
making it explicit here (following the GCC bindings you already 
approved).  Nothing changes.

> 
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - '#clock-cells'
>> +  - '#reset-cells'
>> +  - '#power-domain-cells'
>> +
>> +examples:
>> +  # Example for MMCC for MSM8960:
>> +  - |
>> +    clock-controller@...0000 {
>> +      compatible = "qcom,mmcc-msm8960";
>> +      reg = <0x4000000 0x1000>;
>> +      #clock-cells = <1>;
>> +      #reset-cells = <1>;
>> +      #power-domain-cells = <1>;
>> +    };
>> +...
>> -- 
>> Qualcomm Technologies, Inc. is a member of the
>> Code Aurora Forum, a Linux Foundation Collaborative Project.
>>


-- 
Jeffrey Hugo
Qualcomm Technologies, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.