linux-kernel - RE: [PATCH 2/2] arm64: dts: fsd: add sysreg device node

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Date:   Wed, 23 Nov 2022 19:10:21 +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>
Cc:     <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 2/2] arm64: dts: fsd: add sysreg device node



> -----Original Message-----
> From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@...aro.org]
> Sent: 23 November 2022 18:43
> 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
> Cc: linux-kernel@...r.kernel.org
> Subject: Re: [PATCH 2/2] arm64: dts: fsd: add sysreg device node
> 
> On 23/11/2022 12:57, Sriranjani P wrote:
> >
> >
> >> -----Original Message-----
> >> From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@...aro.org]
> >> Sent: 21 November 2022 17:58
> >> 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
> >> Cc: linux-kernel@...r.kernel.org
> >> Subject: Re: [PATCH 2/2] arm64: dts: fsd: add sysreg device node
> >>
> >> On 21/11/2022 10:11, Sriranjani P wrote:
> >>> Add SYSREG controller device node, which is available in PERIC,
> >>> FSYS0 and
> >>> FSYS1 block of FSD SoC.
> >>>
> >>> Signed-off-by: Alim Akhtar <alim.akhtar@...sung.com>
> >>> Signed-off-by: Pankaj Dubey <pankaj.dubey@...sung.com>
> >>> Signed-off-by: Sriranjani P <sriranjani.p@...sung.com>
> >>> ---
> >>>  arch/arm64/boot/dts/tesla/fsd.dtsi | 15 +++++++++++++++
> >>>  1 file changed, 15 insertions(+)
> >>>
> >>> diff --git a/arch/arm64/boot/dts/tesla/fsd.dtsi
> >>> b/arch/arm64/boot/dts/tesla/fsd.dtsi
> >>> index f35bc5a288c2..db78816ba0bf 100644
> >>> --- a/arch/arm64/boot/dts/tesla/fsd.dtsi
> >>> +++ b/arch/arm64/boot/dts/tesla/fsd.dtsi
> >>> @@ -518,6 +518,21 @@
> >>>  				"dout_cmu_fsys1_shared0div4";
> >>>  		};
> >>>
> >>> +		sysreg_peric: syscon@...30000 {
> >>
> >> Node name system-controller
> > [Sriranjani P] Will fix it in the next version. We added “syscon” since I
> referred other dtsi files in mainline for example exynosautov9.dtsi used
> syscon as node name. If this is the name we should add then I’ll post few
> more patches fixing this node name in other Exynos dtsi files.
> 
> Use proper wrapping for mailing lists. It's difficult to read your emails.

Sorry for the confusion. I have fixed my email client now.

> 
> >> and either put it next to existing one or next to functional block
> >> (peric
> >> clocks?) ordered by unit address.
> > [Sriranjani P] We thought of it but as I saw current fsd.dtsi file and other
> exynos file like exynosautov9.dtsi, in that nodes are not properly arranged as
> per unit address.
> 
> I know, that's why I proposed to order by unit address within other syscons
> or other functional blocks (e.g. peric-related).

Got it. I'll move the sysreg nodes near to their functional blocks and order them by unit address.

> 
> >
> > So I can think of following two approaches:
> > 1: For the time being I will put this sysreg node in between
> > clock_peric node and clock_fysys0 node and clock_fsys1 node as per
> > increasing unit address. I will clean up other exynos and FSD DTSI
> > files and post a new patch
> 
> Not sure what cleaning you have in mind.
> 
> > 2: First I will clean up exynos and FSD DTSI files and then post this sysreg
> patch keeping it at appropriate place.
> 
> What cleaning?

By cleaning I meant fixing these dtsi files to have the device nodes in the order of ascending unit address.

> 
> Best regards,
> Krzysztof

Thank you.