linux-kernel - Re: [PATCH v2 3/6] arm64: dts: fsd: add sysreg device node

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Message-ID: <CAPLW+4nH=QQj+eWVrxeeOmgZ9UTGeL4__uttkNsji4XsGjOv3w@mail.gmail.com>
Date:   Wed, 9 Nov 2022 12:17:42 +0100
From:   Sam Protsenko <semen.protsenko@...aro.org>
To:     Vivek Yadav <vivek.2311@...sung.com>
Cc:     rcsekar@...sung.com, krzysztof.kozlowski+dt@...aro.org,
        wg@...ndegger.com, mkl@...gutronix.de, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com,
        pankaj.dubey@...sung.com, ravi.patel@...sung.com,
        alim.akhtar@...sung.com, linux-fsd@...la.com, robh+dt@...nel.org,
        linux-can@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, devicetree@...r.kernel.org,
        aswani.reddy@...sung.com, sriranjani.p@...sung.com
Subject: Re: [PATCH v2 3/6] arm64: dts: fsd: add sysreg device node

Hi Vivek,

On Wed, 9 Nov 2022 at 11:54, Vivek Yadav <vivek.2311@...sung.com> wrote:
>
> From: Sriranjani P <sriranjani.p@...sung.com>
>
> Add SYSREG controller device node, which is available in PERIC and FSYS0
> block of FSD SoC.
>
> Signed-off-by: Alim Akhtar <alim.akhtar@...sung.com>
> Signed-off-by: Pankaj Kumar Dubey <pankaj.dubey@...sung.com>
> Cc: devicetree@...r.kernel.org
> Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
> Cc: Rob Herring <robh+dt@...nel.org>
> Signed-off-by: Sriranjani P <sriranjani.p@...sung.com>
> ---
>  arch/arm64/boot/dts/tesla/fsd.dtsi | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/tesla/fsd.dtsi b/arch/arm64/boot/dts/tesla/fsd.dtsi
> index f35bc5a288c2..3d8ebbfc27f4 100644
> --- a/arch/arm64/boot/dts/tesla/fsd.dtsi
> +++ b/arch/arm64/boot/dts/tesla/fsd.dtsi
> @@ -518,6 +518,16 @@
>                                 "dout_cmu_fsys1_shared0div4";
>                 };
>
> +               sysreg_peric: system-controller@...30000 {
> +                       compatible = "tesla,sysreg_peric", "syscon";
> +                       reg = <0x0 0x14030000 0x0 0x1000>;

Probably not related to this particular patch, but does the "reg"
really have to have those extra 0x0s? Why it can't be just:

    reg = <0x14030000 0x1000>;

That comment applies to the whole dts/dtsi. Looks like #address-cells
or #size-cells are bigger than they should be, or I missing something?

> +               };
> +
> +               sysreg_fsys0: system-controller@...30000 {
> +                       compatible = "tesla,sysreg_fsys0", "syscon";
> +                       reg = <0x0 0x15030000 0x0 0x1000>;
> +               };
> +
>                 mdma0: dma-controller@...00000 {
>                         compatible = "arm,pl330", "arm,primecell";
>                         reg = <0x0 0x10100000 0x0 0x1000>;
> --
> 2.17.1
>