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

["Sriranjani P" <sriranjani.p@samsung.com>]

> -----Original Message-----
> From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@linaro.org]
> Sent: 25 November 2022 17:10
> To: Sriranjani P <sriranjani.p@samsung.com>; robh+dt@kernel.org;
> krzysztof.kozlowski+dt@linaro.org; lee@kernel.org;
> devicetree@vger.kernel.org; alim.akhtar@samsung.com;
> pankaj.dubey@samsung.com; ravi.patel@samsung.com; Sam Protsenko
> <semen.protsenko@linaro.org>; Chanho Park
> <chanho61.park@samsung.com>
> Cc: linux-kernel@vger.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@samsung.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.