linux-kernel - Re: [PATCH v5 3/4] dt-bindings: clock: rk3588: export PCLK

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Message-ID: <f013df81-670e-37c4-c1a7-e1302352ca20@rock-chips.com>
Date:   Thu, 9 Nov 2023 18:05:51 +0800
From:   zhangqing <zhangqing@...k-chips.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Conor Dooley <conor.dooley@...rochip.com>
Cc:     Conor Dooley <conor@...nel.org>, mturquette@...libre.com,
        sboyd@...nel.org, kever.yang@...k-chips.com, heiko@...ech.de,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        huangtao@...k-chips.com, andy.yan@...k-chips.com,
        Sebastian Reichel <sebastian.reichel@...labora.com>
Subject: Re: [PATCH v5 3/4] dt-bindings: clock: rk3588: export PCLK_VO1GRF clk
 id


在 2023/11/9 17:21, Krzysztof Kozlowski 写道:
> On 09/11/2023 09:06, zhangqing wrote:
>> 在 2023/11/9 15:29, Conor Dooley 写道:
>>> On Thu, Nov 09, 2023 at 02:27:38PM +0800, zhangqing wrote:
>>>> Hi:
>>>>
>>>> 在 2023/11/8 20:01, Conor Dooley 写道:
>>>>> On Wed, Nov 08, 2023 at 02:18:21PM +0800, Elaine Zhang wrote:
>>>>>> export PCLK_VO1GRF for DT.
>>>>>>
>>>>>> Signed-off-by: Elaine Zhang <zhangqing@...k-chips.com>
>>>>>> ---
>>>>>>     include/dt-bindings/clock/rockchip,rk3588-cru.h | 3 ++-
>>>>>>     1 file changed, 2 insertions(+), 1 deletion(-)
>>>>>>
>>>>>> diff --git a/include/dt-bindings/clock/rockchip,rk3588-cru.h b/include/dt-bindings/clock/rockchip,rk3588-cru.h
>>>>>> index 5790b1391201..50ba72980190 100644
>>>>>> --- a/include/dt-bindings/clock/rockchip,rk3588-cru.h
>>>>>> +++ b/include/dt-bindings/clock/rockchip,rk3588-cru.h
>>>>>> @@ -733,8 +733,9 @@
>>>>>>     #define ACLK_AV1_PRE			718
>>>>>>     #define PCLK_AV1_PRE			719
>>>>>>     #define HCLK_SDIO_PRE			720
>>>>>> +#define PCLK_VO1GRF			721
>>>>>> -#define CLK_NR_CLKS			(HCLK_SDIO_PRE + 1)
>>>>>> +#define CLK_NR_CLKS			(PCLK_VO1GRF + 1)
>>>>> This definition is part of the ABI, if it is safe to change it, then it
>>>>> is safe to delete it.
>>>> The new ID is to solve the niu clock dependency problem(Used in PATCH V5
>>>> 4/4).This new ID will also be used in DTS in the future.
>>>>
>>>> CLK_NR_CLKS represents the number of clocks used by the
>>>> drivers/clk/rockchip/clk-rkxxx.c. It is safe to modify it, but cannot delete
>>>> it.
>>> Then delete it from the header and move it to clk-rkxxx.c
>> I don't think it's more appropriate to move to clk-rkxxx.c.
>> Because if there are new requirements later, and add new clk id, it is
>> not in the same file, maybe forget to modify CLK_NR_CLKS.
> Then you are not allowed to change it. It's part of ABI.

If you just don't want me to modify CLK_NR_CLKS, can I use an unused ID, 
like [PATCH V4 3/4]:

-#define MBIST_MCLK_PDM1                        24
+#define PCLK_VO1GRF                    24

>
> Best regards,
> Krzysztof
>
-- 
张晴
瑞芯微电子股份有限公司
Rockchip Electronics Co.,Ltd
地址：福建省福州市铜盘路软件大道89号软件园A区21号楼
Add:No.21 Building, A District, No.89 Software Boulevard Fuzhou, Fujian 350003, P.R.China
Tel:+86-0591-83991906-8601
邮编：350003
E-mail:elaine.zhang@...k-chips.com
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