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

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Message-ID: <119675e462ce53a05acf55bb3d9fe91f@disroot.org>
Date: Wed, 18 Jun 2025 16:07:16 +0000
From: Kaustabh Chakraborty <kauschluss@...root.org>
To: Krzysztof Kozlowski <krzk@...nel.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 2025-06-18 15:40, Krzysztof Kozlowski wrote:
> 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?

Checked it, understood. It's meant to be:
"samsung,exynos<soc>-<function>-sysreg", "syscon"

> 
> Best regards,
> Krzysztof