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Date: Fri, 26 Apr 2024 19:56:51 +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 4/25/2024 7:02 PM, Vladimir Zapolskiy wrote:
> Hi Jagadeesh,
>
> On 4/22/24 14:00, Jagadeesh Kona wrote:
>>
>> 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?
>
> Well, I didn't get any new information to abandon my suggestion, what is
> wrong with it or why is it less preferable?
>
> Even if you add a comment in the header file, it means that for SM8450
> platforms you'll begin to define inapplicable/unrelated macro for the
> platform, which opens a small risk of the misusage, and which can be
> easily avoided. I believe that the clarity is better for maintenance.
>
Yes, I agree. Will check and move these new clocks to a separate header
file in next series. Thanks!
Thanks,
Jagadeesh
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