linux-kernel - Re: [PATCH v3 2/8] ARM: dts: hisilicon: add missing compatibles to CRG node

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Date: Fri, 23 Feb 2024 02:24:04 +0800
From: Yang Xiwen <forbidden405@...look.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...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>
Cc: David Yang <mmyangfl@...il.com>, linux-clk@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 2/8] ARM: dts: hisilicon: add missing compatibles to
 CRG node

On 2/23/2024 2:18 AM, Krzysztof Kozlowski wrote:
> On 22/02/2024 19:13, Yang Xiwen wrote:
>> On 2/23/2024 2:08 AM, Krzysztof Kozlowski wrote:
>>> On 21/02/2024 17:41, Yang Xiwen via B4 Relay wrote:
>>>> From: Yang Xiwen <forbidden405@...look.com>
>>>>
>>>> Add "syscon" and "simple-mfd" compatibles to CRG node due to recent
>>>> binding changes.
>>> Why? You claimed you added them in the bindings because DTS has them. In
>>> DTS you claim reason is: binding has them.
>>>
>>> That's confusing.
>>
>> Because the old txt based binding claimed there should not be a "syscon"
>> and "simple-mfd".
>>
>>
>> But it exists in hi3798cv200.dtsi. And i think it does no harm to be
>> there. So should i do it in two commits?
> hi3798cv200 is not hi3519, is it? You are adding simple-mfd to one SoC
> because some other has it? I don't see reason to do that. Er, why?


I think it's the careless HiSilicon people who simply forgot to add it. 
CRG core on these SoCs are very similar. They only provided a bunch of 
clocks and resets. Some register offsets in them are even the same 
across SoCs. So I'll say all CRG devices are "syscon" and "simple-mfd".


In fact, i do have TRM for Hi3519 so i can prove what i said is true.


>
> Best regards,
> Krzysztof
>

-- 
Regards,
Yang Xiwen