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

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Message-ID: <97a54a9f-8719-4bbd-a1d5-dd398f42ab0c@kernel.org>
Date: Wed, 18 Jun 2025 16:37:33 +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 16:32, 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?

Best regards,
Krzysztof