linux-kernel - Re: [PATCH v4 1/2] dt-bindings: clock: Add QDU1000 and QRU1000 GCC clocks

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Message-ID: <bb5f2000-1e54-fc37-a596-0a3dafdbff57@quicinc.com>
Date:   Mon, 21 Nov 2022 14:19:11 -0600
From:   Melody Olvera <quic_molvera@...cinc.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        "Michael Turquette" <mturquette@...libre.com>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
CC:     Taniya Das <quic_tdas@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 1/2] dt-bindings: clock: Add QDU1000 and QRU1000 GCC
 clocks



On 11/20/2022 5:06 AM, Krzysztof Kozlowski wrote:
> On 18/11/2022 19:18, Melody Olvera wrote:
>> Add device tree bindings for global clock controller on QDU1000 and
>> QRU1000 SoCs.
>>
>> Signed-off-by: Melody Olvera <quic_molvera@...cinc.com>
>> ---
>>  .../bindings/clock/qcom,gcc-qdu1000.yaml      |  70 ++++++++
>>  include/dt-bindings/clock/qcom,gcc-qdu1000.h  | 170 ++++++++++++++++++
>>  2 files changed, 240 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/clock/qcom,gcc-qdu1000.yaml
>>  create mode 100644 include/dt-bindings/clock/qcom,gcc-qdu1000.h
>>
>> diff --git a/Documentation/devicetree/bindings/clock/qcom,gcc-qdu1000.yaml b/Documentation/devicetree/bindings/clock/qcom,gcc-qdu1000.yaml
>> new file mode 100644
>> index 000000000000..90935a6795ee
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/clock/qcom,gcc-qdu1000.yaml
>> @@ -0,0 +1,70 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/clock/qcom,gcc-qdu1000.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Qualcomm Global Clock & Reset Controller for QDU1000 and QRU1000
>> +
>> +allOf:
>> +  - $ref: qcom,gcc.yaml#
>> +
>> +maintainers:
>> +  - Melody Olvera <quic_molvera@...cinc.com>
>> +
>> +description: |
>> +  Qualcomm global clock control module which supports the clocks, resets and
>> +  power domains on QDU1000 and QRU1000
> Keep the same style as existing files. They were cleaned up recently.
>
>> +
>> +  See also:
>> +  - include/dt-bindings/clock/qcom,gcc-qdu1000.h
> Keep the same style, so missing '::', drop '- '.

Got it.

>
>> +
>> +properties:
>> +  compatible:
>> +    items:
>> +      - const: qcom,gcc-qdu1000
> SM8550 is coming with proper style of compatible, so let's do the same
> also here: qcom,qdu1000-gcc
> (and file name matching it)

Ok... this is fine if we're moving to a new style. sm8550 seems to have the file
name wrong in last PS.

>
>
>> +      - const: syscon
> I don't see usage of it as syscon. Which parts of GCC are needed for whom?

I think I got this from another binding. We can remove.

>
>> +
>> +  clocks:
>> +    items:
>> +      - description: Board XO source
>> +      - description: Sleep clock source
>> +      - description: PCIE 0 Pipe clock source
>> +      - description: PCIE 0 Phy Auxiliary clock source
>> +      - description: USB3 Phy wrapper pipe clock source
>> +    minItems: 2
> Same question as for SM8550 - why inputs are flexible? Either you have
> these or you do not.

Fair enough. We have these clocks so we can remove minItems.

>
>> +
>> +  '#clock-cells':
>> +    const: 1
>> +
>> +  '#reset-cells':
>> +    const: 1
>> +
>> +  '#power-domain-cells':
>> +    const: 1
> Missing ref to gcc.yaml. Drop all properties provided by gcc.yaml.

Got it.

>
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +  - '#clock-cells'
>> +  - '#reset-cells'
> Drop these required by gcc.yaml.

Ack.

Thanks,
Melody
>
>
>
> Best regards,
> Krzysztof
>