linux-kernel - Re: [PATCH V2 RESEND 1/6] dt-bindings: clock: qcom: Add SM8650 video clock controller

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Date: Mon, 22 Apr 2024 16:30:26 +0530
From: Jagadeesh Kona <quic_jkona@...cinc.com>
To: Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>,
        Dmitry Baryshkov
	<dmitry.baryshkov@...aro.org>
CC: Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio
	<konrad.dybcio@...aro.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        "Krzysztof
 Kozlowski" <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley
	<conor+dt@...nel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-clk@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, Taniya Das <quic_tdas@...cinc.com>,
        "Satya
 Priya Kakitapalli" <quic_skakitap@...cinc.com>,
        Ajit Pandey
	<quic_ajipan@...cinc.com>,
        Imran Shaik <quic_imrashai@...cinc.com>,
        "Krzysztof Kozlowski" <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH V2 RESEND 1/6] dt-bindings: clock: qcom: Add SM8650 video
 clock controller



On 4/19/2024 2:31 AM, Vladimir Zapolskiy wrote:
> Hello Jagadeesh,
> 
> On 3/25/24 08:07, Jagadeesh Kona wrote:
>>
>>
>> On 3/21/2024 6:42 PM, Dmitry Baryshkov wrote:
>>> On Thu, 21 Mar 2024 at 11:26, Jagadeesh Kona <quic_jkona@...cinc.com> 
>>> wrote:
>>>>
>>>> Extend device tree bindings of SM8450 videocc to add support
>>>> for SM8650 videocc. While it at, fix the incorrect header
>>>> include in sm8450 videocc yaml documentation.
>>>>
>>>> Signed-off-by: Jagadeesh Kona <quic_jkona@...cinc.com>
>>>> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>>>> ---
>>>>    .../devicetree/bindings/clock/qcom,sm8450-videocc.yaml    | 4 +++-
>>>>    include/dt-bindings/clock/qcom,sm8450-videocc.h           | 8 
>>>> +++++++-
>>>>    2 files changed, 10 insertions(+), 2 deletions(-)
>>>>
>>>> diff --git 
>>>> a/Documentation/devicetree/bindings/clock/qcom,sm8450-videocc.yaml 
>>>> b/Documentation/devicetree/bindings/clock/qcom,sm8450-videocc.yaml
>>>> index bad8f019a8d3..79f55620eb70 100644
>>>> --- a/Documentation/devicetree/bindings/clock/qcom,sm8450-videocc.yaml
>>>> +++ b/Documentation/devicetree/bindings/clock/qcom,sm8450-videocc.yaml
>>>> @@ -8,18 +8,20 @@ title: Qualcomm Video Clock & Reset Controller on 
>>>> SM8450
>>>>
>>>>    maintainers:
>>>>      - Taniya Das <quic_tdas@...cinc.com>
>>>> +  - Jagadeesh Kona <quic_jkona@...cinc.com>
>>>>
>>>>    description: |
>>>>      Qualcomm video clock control module provides the clocks, resets 
>>>> and power
>>>>      domains on SM8450.
>>>>
>>>> -  See also:: include/dt-bindings/clock/qcom,videocc-sm8450.h
>>>> +  See also:: include/dt-bindings/clock/qcom,sm8450-videocc.h
>>>
>>> This almost pleads to go to a separate patch. Fixes generally should
>>> be separated from the rest of the changes.
>>>
>>
>> Thanks Dmitry for your review.
>>
>> Sure, will separate this into a separate patch in next series.
>>
>>>>
>>>>    properties:
>>>>      compatible:
>>>>        enum:
>>>>          - qcom,sm8450-videocc
>>>>          - qcom,sm8550-videocc
>>>> +      - qcom,sm8650-videocc
>>>>
>>>>      reg:
>>>>        maxItems: 1
>>>> diff --git a/include/dt-bindings/clock/qcom,sm8450-videocc.h 
>>>> b/include/dt-bindings/clock/qcom,sm8450-videocc.h
>>>> index 9d795adfe4eb..ecfebe52e4bb 100644
>>>> --- a/include/dt-bindings/clock/qcom,sm8450-videocc.h
>>>> +++ b/include/dt-bindings/clock/qcom,sm8450-videocc.h
>>>> @@ -1,6 +1,6 @@
>>>>    /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
>>>>    /*
>>>> - * Copyright (c) 2023, Qualcomm Innovation Center, Inc. All rights 
>>>> reserved.
>>>> + * Copyright (c) 2023-2024, Qualcomm Innovation Center, Inc. All 
>>>> rights reserved.
>>>>     */
>>>>
>>>>    #ifndef _DT_BINDINGS_CLK_QCOM_VIDEO_CC_SM8450_H
>>>> @@ -19,6 +19,11 @@
>>>>    #define 
>>>> VIDEO_CC_MVS1C_DIV2_DIV_CLK_SRC                                9
>>>>    #define VIDEO_CC_PLL0                                          10
>>>>    #define VIDEO_CC_PLL1                                          11
>>>> +#define 
>>>> VIDEO_CC_MVS0_SHIFT_CLK                                        12
>>>> +#define VIDEO_CC_MVS0C_SHIFT_CLK                               13
>>>> +#define 
>>>> VIDEO_CC_MVS1_SHIFT_CLK                                        14
>>>> +#define VIDEO_CC_MVS1C_SHIFT_CLK                               15
>>>> +#define VIDEO_CC_XO_CLK_SRC                                    16
>>>
>>> Are these values applicable to sm8450?
>>>
>>
>> No, the shift clocks above are part of SM8650 only. To reuse the
>> existing SM8550 videocc driver for SM8650 and to register these shift
>> clocks for SM8650, I added them here.
>>
> 
> In such case I'd strongly suggest to add a new qcom,sm8650-videocc.h file,
> and do #include qcom,sm8450-videocc.h in it, thus the new header will be
> really a short one.
> 
> This will add pristine clarity.
> 

Thanks Vladimir for your suggestion. I believe adding a comment for 
these set of clocks should be sufficient to indicate these clocks are 
applicable only for SM8650, I can add the required comment and post the 
next series. Please let me know if this works?

Thanks,
Jagadeesh