linux-kernel - Re: [PATCH 1/3] dt-bindings: clock: Add Qualcomm SC8180X Camera clock controller

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Message-ID: <bda4e8ad-0d72-4a07-90ef-9fa4245fd205@quicinc.com>
Date: Wed, 30 Apr 2025 14:13:47 +0530
From: Satya Priya Kakitapalli <quic_skakitap@...cinc.com>
To: Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Bjorn Andersson
	<andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        "Stephen
 Boyd" <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Konrad Dybcio
	<konradybcio@...nel.org>
CC: Ajit Pandey <quic_ajipan@...cinc.com>,
        Imran Shaik
	<quic_imrashai@...cinc.com>,
        Taniya Das <quic_tdas@...cinc.com>,
        "Jagadeesh
 Kona" <quic_jkona@...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 1/3] dt-bindings: clock: Add Qualcomm SC8180X Camera clock
 controller


On 4/24/2025 4:08 PM, Satya Priya Kakitapalli wrote:
>
> On 4/22/2025 5:11 PM, Bryan O'Donoghue wrote:
>> On 22/04/2025 06:42, Satya Priya Kakitapalli wrote:
>>> Add device tree bindings for the camera clock controller on
>>> Qualcomm SC8180X platform.
>>>
>>> Signed-off-by: Satya Priya Kakitapalli <quic_skakitap@...cinc.com>
>>> ---
>>>   .../bindings/clock/qcom,sc8180x-camcc.yaml         |  65 ++++++++
>>>   include/dt-bindings/clock/qcom,sc8180x-camcc.h     | 181 
>>> +++++++++++++++++++++
>>>   2 files changed, 246 insertions(+)
>>>
>>> diff --git 
>>> a/Documentation/devicetree/bindings/clock/qcom,sc8180x-camcc.yaml 
>>> b/Documentation/devicetree/bindings/clock/qcom,sc8180x-camcc.yaml
>>> new file mode 100644
>>> index 
>>> 0000000000000000000000000000000000000000..b17f40ee53a3002b2942869d60773dbecd764134
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/clock/qcom,sc8180x-camcc.yaml
>>> @@ -0,0 +1,65 @@
>>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>>> +%YAML 1.2
>>> +---
>>> +$id: http://devicetree.org/schemas/clock/qcom,sc8180x-camcc.yaml#
>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>> +
>>> +title: Qualcomm Camera Clock & Reset Controller on SC8180X
>>> +
>>> +maintainers:
>>> +  - Satya Priya Kakitapalli <quic_skakitap@...cinc.com>
>>> +
>>> +description: |
>>
>> You can drop the "|"
>>
>
> okay.
>
>

I tried removing this, but it is throwing below error, in the line "See 
also: include/dt-bindings/clock/qcom,sc8180x-camcc.h" because of usage 
of a colon there.

Error: 
Documentation/devicetree/bindings/clock/qcom,sc8180x-camcc.yaml:16:12: 
mapping values are not allowed in this context

As we are following the same format in all other Qualcomm bindings, I'll 
keep the "|" and "See also:" section as is.


>>> +  Qualcomm camera clock control module provides the clocks, resets and
>>> +  power domains on SC8180X.
>>> +
>>> +  See also: include/dt-bindings/clock/qcom,sc8180x-camcc.h
>>> +
>>> +properties:
>>> +  compatible:
>>> +    const: qcom,sc8180x-camcc
>>> +
>>> +  clocks:
>>> +    items:
>>> +      - description: Board XO source
>>> +      - description: Sleep clock source
>>
>> Missing clock-names
>>
>
> Since we are using DT based indexing method, clock names are not 
> required.
>
>
>> A suspicious lack of clock depends here. No AHB clock ?> +
>>> +  power-domains:
>>> +    maxItems: 1
>>> +    description:
>>> +      A phandle and PM domain specifier for the MMCX power domain.
>>> +
>>> +  required-opps:
>>> +    maxItems: 1
>>> +    description:
>>> +      A phandle to an OPP node describing required MMCX performance 
>>> point.
>>> +
>>> +allOf:
>>> +  - $ref: qcom,gcc.yaml#
>>
>> A suspicious lack of clock depends here. No AHB clock ? No dependency 
>> on gcc ?
>>
>> You call out the gcc above.
>>
>> Could you please recheck your list of clock dependencies.
>
> The dependent GCC clocks are marked always on from gcc probe, hence 
> did not mention the dependency here.
>
>
>>
>> ---
>> bod
>