linux-kernel - RE: [PATCH v2 1/2] dt-bindings: mfd: syscon: Add tesla compatibles found on FSD SoC

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Date:   Fri, 25 Nov 2022 17:34:09 +0530
From:   "Sriranjani P" <sriranjani.p@...sung.com>
To:     "'Krzysztof Kozlowski'" <krzysztof.kozlowski@...aro.org>,
        <robh+dt@...nel.org>, <krzysztof.kozlowski+dt@...aro.org>,
        <lee@...nel.org>, <devicetree@...r.kernel.org>,
        <alim.akhtar@...sung.com>, <pankaj.dubey@...sung.com>,
        <ravi.patel@...sung.com>,
        "'Sam Protsenko'" <semen.protsenko@...aro.org>,
        "'Chanho Park'" <chanho61.park@...sung.com>
Cc:     <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 1/2] dt-bindings: mfd: syscon: Add tesla compatibles
 found on FSD SoC



> -----Original Message-----
> From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@...aro.org]
> Sent: 25 November 2022 17:10
> To: Sriranjani P <sriranjani.p@...sung.com>; robh+dt@...nel.org;
> krzysztof.kozlowski+dt@...aro.org; lee@...nel.org;
> devicetree@...r.kernel.org; alim.akhtar@...sung.com;
> pankaj.dubey@...sung.com; ravi.patel@...sung.com; Sam Protsenko
> <semen.protsenko@...aro.org>; Chanho Park
> <chanho61.park@...sung.com>
> Cc: linux-kernel@...r.kernel.org
> Subject: Re: [PATCH v2 1/2] dt-bindings: mfd: syscon: Add tesla compatibles
> found on FSD SoC
> 
> On 25/11/2022 12:29, Krzysztof Kozlowski wrote:
> > On 25/11/2022 08:06, Sriranjani P wrote:
> >> Add compatible for Tesla SYSREG controllers found on FSD SoC.
> >>
> >> Signed-off-by: Sriranjani P <sriranjani.p@...sung.com>
> >> ---
> >
> > Thank you for your patch. There is something to discuss/improve.
> >
> >>  Documentation/devicetree/bindings/mfd/syscon.yaml | 1 +
> >>  1 file changed, 1 insertion(+)
> >>
> >> diff --git a/Documentation/devicetree/bindings/mfd/syscon.yaml
> >> b/Documentation/devicetree/bindings/mfd/syscon.yaml
> >> index 4e4baf53796d..8c3334999bec 100644
> >> --- a/Documentation/devicetree/bindings/mfd/syscon.yaml
> >> +++ b/Documentation/devicetree/bindings/mfd/syscon.yaml
> >> @@ -69,6 +69,7 @@ properties:
> >>                - samsung,exynos5433-sysreg
> >>                - samsung,exynos850-sysreg
> >>                - samsung,exynosautov9-sysreg
> >> +              - tesla,fsd-sysreg
> >
> > I think we made mistake starting from 5433. Before (Exynos3/4/5) there
> > was only one block called actually SYSREG. For example on Exynos5433
> > we have SYSREG_DISP, SYSREG_CAM1 and so on. These are different so we
> > should have dedicated compatibles. The same for Tesla - please provide
> > dedicated compatibles per each block.
> >
> > I'll fix Exynos5433. Maybe someone can also fix Exynos850 and Autov9.
> 
> To clarify - in case of Tesla, you do not need the fallbacks, so you just add few
> of:
>    - tesla,fsd-xxx-sysreg
> within the enum.

Thanks for improvement idea and clarification. I'll update accordingly in the
next version.

> 
> For Exynos850 and Autov9, just like for Exynso5433, we should keep it
> backwards compatible, so we need fallbacks.

I will update for Exynos850 and Autov9 as like Exynos5433 and post the patch.

> 
> Best regards,
> Krzysztof
Thank you.