linux-kernel - Re: [PATCH RFC v2 1/5] dt-bindings: clock: histb-clock: Add missing common clock and Hi3798MV200 specific clock definition

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Date: Tue, 20 Feb 2024 17:13:44 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: Yang Xiwen <forbidden405@...look.com>,
 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>
Cc: David Yang <mmyangfl@...il.com>, linux-clk@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC v2 1/5] dt-bindings: clock: histb-clock: Add missing
 common clock and Hi3798MV200 specific clock definition

On 20/02/2024 15:06, Yang Xiwen wrote:
> On 2/20/2024 6:10 PM, Krzysztof Kozlowski wrote:
>> On 17/02/2024 13:52, Yang Xiwen via B4 Relay wrote:
>>> From: Yang Xiwen <forbidden405@...look.com>
>>>
>>> According to the datasheet, some clocks are missing, add their
>>> definitions first.
>>>
>>> Some aliases for hi3798mv200 are also introduced.
>>>
>>> Signed-off-by: Yang Xiwen <forbidden405@...look.com>
>>> ---
>>>   include/dt-bindings/clock/histb-clock.h | 21 +++++++++++++++++++++
>>>   1 file changed, 21 insertions(+)
>>>
>>> diff --git a/include/dt-bindings/clock/histb-clock.h b/include/dt-bindings/clock/histb-clock.h
>>> index e64e5770ada6..68a53053586a 100644
>>> --- a/include/dt-bindings/clock/histb-clock.h
>>> +++ b/include/dt-bindings/clock/histb-clock.h
>>> @@ -58,6 +58,27 @@
>>>   #define HISTB_USB3_UTMI_CLK1		48
>>>   #define HISTB_USB3_PIPE_CLK1		49
>>>   #define HISTB_USB3_SUSPEND_CLK1		50
>>> +#define HISTB_SDIO1_BIU_CLK		51
>>> +#define HISTB_SDIO1_CIU_CLK		52
>>> +#define HISTB_SDIO1_DRV_CLK		53
>>> +#define HISTB_SDIO1_SAMPLE_CLK		54
>>> +#define HISTB_ETH0_PHY_CLK		55
>>> +#define HISTB_ETH1_PHY_CLK		56
>>> +#define HISTB_WDG0_CLK			57
>>> +#define HISTB_USB2_UTMI0_CLK		HISTB_USB2_UTMI_CLK
>> Why? It's anyway placed oddly, the entries are ordered by number/value.
> 
> 
> So this is somewhat broken at the beginning. It named after 
> histb-clock.h but actually they are all clocks for Hi3798CV200 SoC. For 
> Hi3798MV200(also a HiSTB SoC), there is one additional UTMI clock.
> 
> 
> What solution do you prefer? rename UTMI_CLK to UTMI0_CLK, add UTMI1_CLK 
> after it and increment all the indexes after it? Then the diff would be 
> very ugly.

I still don't understand what is the problem you are trying to solve
here. Your commit msg says add missing ID, but that ID -
HISTB_USB2_UTMI_CLK - is already there.

I also do not get why there is a need to rename anything.



Best regards,
Krzysztof