linux-kernel - Re: [PATCH 11/17] arm64: dts: r8a77965: Add VSP instances

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Message-ID: <CAMuHMdU7OyUvgNqbkjtHyb0LPjgTdPp_BBcGNbjiqfQUgCdMuw@mail.gmail.com>
Date:   Fri, 8 Jun 2018 11:29:29 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Mark Rutland <mark.rutland@....com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Takeshi Kihara <takeshi.kihara.df@...esas.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Magnus Damm <magnus.damm@...il.com>,
        open list <linux-kernel@...r.kernel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        Simon Horman <horms@...ge.net.au>,
        Will Deacon <will.deacon@....com>,
        "moderated list:ARM64 PORT (AARCH64 ARCHITECTURE)" 
        <linux-arm-kernel@...ts.infradead.org>,
        Sergei Shtylyov <sergei.shtylyov@...entembedded.com>
Subject: Re: [PATCH 11/17] arm64: dts: r8a77965: Add VSP instances

Hi Laurent,

CC Sergei (for V3H/V3M)

On Thu, Apr 26, 2018 at 11:11 PM, Laurent Pinchart
<laurent.pinchart@...asonboard.com> wrote:
> On Thursday, 26 April 2018 19:53:40 EEST Kieran Bingham wrote:
>> The r8a77965 has 4 VSP instances.
>>
>> Based on a similar patch of the R8A7796 device tree
>> by Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>.
>>
>> Signed-off-by: Takeshi Kihara <takeshi.kihara.df@...esas.com>
>> [Kieran: Rebased to top of tree, fixed sort orders]
>> Signed-off-by: Kieran Bingham <kieran.bingham+renesas@...asonboard.com>
>> ---
>>  arch/arm64/boot/dts/renesas/r8a77965.dtsi | 44 +++++++++++++++++++++++
>>  1 file changed, 44 insertions(+)
>>
>> diff --git a/arch/arm64/boot/dts/renesas/r8a77965.dtsi
>> b/arch/arm64/boot/dts/renesas/r8a77965.dtsi index
>> 1f44ed7c1b1c..e92e6b03333a 100644
>> --- a/arch/arm64/boot/dts/renesas/r8a77965.dtsi
>> +++ b/arch/arm64/boot/dts/renesas/r8a77965.dtsi

>> @@ -1025,6 +1047,17 @@
>>                       resets = <&cpg 611>;
>>               };
>>
>> +             vspd0: vsp@...20000 {
>> +                     compatible = "renesas,vsp2";
>> +                     reg = <0 0xfea20000 0 0x4000>;
>
> RFP2 has a CLUT so the register range needs to be extended. I'd recommend
> covering the entire space (0x8000) even if no LUT or CLU module is present.

Even on V3H/V3M, which have some part of the CLUT, and could do
with 0x5000?

Note that this makes it overlap with fcpvd0 on all R-Car Gen3 SoCs,
as mentioned by Simon on IRC.

>> +                     interrupts = <GIC_SPI 466 IRQ_TYPE_LEVEL_HIGH>;
>> +                     clocks = <&cpg CPG_MOD 623>;
>> +                     power-domains = <&sysc R8A77965_PD_ALWAYS_ON>;
>> +                     resets = <&cpg 623>;
>> +
>> +                     renesas,fcp = <&fcpvd0>;
>> +             };
>> +
>>               fcpvd0: fcp@...27000 {
>>                       compatible = "renesas,fcpv";
>>                       reg = <0 0xfea27000 0 0x200>;

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds