linux-kernel - Re: [PATCH 1/5] dt-bindings: samsung: exynos-sysreg: add exynos7870 sysregs

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Message-ID: <00e28a4a-78d6-4452-b28f-29d2e201f6d9@kernel.org>
Date: Wed, 18 Jun 2025 17:40:15 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Kaustabh Chakraborty <kauschluss@...root.org>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>, Alim Akhtar <alim.akhtar@...sung.com>,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/5] dt-bindings: samsung: exynos-sysreg: add exynos7870
 sysregs

On 18/06/2025 16:49, Kaustabh Chakraborty wrote:
> On 2025-06-18 14:37, Krzysztof Kozlowski wrote:
>> On 18/06/2025 16:32, Kaustabh Chakraborty wrote:
>>> On 2025-06-18 09:46, Krzysztof Kozlowski wrote:
>>>> On 12/06/2025 17:23, Kaustabh Chakraborty wrote:
>>>>> Add sysreg compatible strings for the Exynos7870 SoC. Two sysregs 
>>>>> are
>>>>> added, used for the SoC MIPI PHY's CSIS and DSIM blocks.
>>>>>
>>>>> Signed-off-by: Kaustabh Chakraborty <kauschluss@...root.org>
>>>>> ---
>>>>>  .../devicetree/bindings/soc/samsung/samsung,exynos-sysreg.yaml      
>>>>> | 6 ++++++
>>>>>  1 file changed, 6 insertions(+)
>>>>>
>>>>> diff --git 
>>>>> a/Documentation/devicetree/bindings/soc/samsung/samsung,exynos-sysreg.yaml 
>>>>> b/Documentation/devicetree/bindings/soc/samsung/samsung,exynos-sysreg.yaml
>>>>> index 
>>>>> d27ed6c9d61ea9db77229eca60b6b9a0abc5d305..174bdb8ee932ff965de6fc17aef004a3cedffeb3 
>>>>> 100644
>>>>> --- 
>>>>> a/Documentation/devicetree/bindings/soc/samsung/samsung,exynos-sysreg.yaml
>>>>> +++ 
>>>>> b/Documentation/devicetree/bindings/soc/samsung/samsung,exynos-sysreg.yaml
>>>>> @@ -52,6 +52,12 @@ properties:
>>>>>                - samsung,exynosautov9-sysreg
>>>>>            - const: syscon
>>>>>          deprecated: true
>>>>> +      - items:
>>>>> +          - enum:
>>>>> +              - samsung,exynos7870-cam-sysreg
>>>>> +              - samsung,exynos7870-disp-sysreg
>>>>> +          - const: samsung,exynos7870-sysreg
>>>>
>>>>
>>>> Drop. These are not really compatible or your commit msg is 
>>>> incomplete.
>>>> Don't use deprecated syntax and backwards compatible solutions for 
>>>> new
>>>> hardware.
>>>
>>> Are you sure? The deprecated one is actually the item above. From what 
>>> I
>>
>> Yes. Think why were they added.
>>
>>> understand, those are generic sysregs and don't mention their 
>>> functions.
>>
>> And what is a generic sysreg?
> 
> What I meant is, usually compatibles go like this (in order):

No, they don't. So you checked why they were added?

Best regards,
Krzysztof