linux-kernel - Re: [PATCH 5.15 110/317] arm64: dts: renesas: r8a779a0: Update to R-Car Gen4 compatible values

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Message-ID: <CAMuHMdUK0YYELTN=JQDtGuYg03Em6c7kskpqUR0Y6NbNuR7hfQ@mail.gmail.com>
Date: Mon, 25 Mar 2024 09:43:31 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Sasha Levin <sashal@...nel.org>
Cc: linux-kernel@...r.kernel.org, stable@...r.kernel.org, 
	Wolfram Sang <wsa+renesas@...g-engineering.com>, 
	Linux-Renesas <linux-renesas-soc@...r.kernel.org>
Subject: Re: [PATCH 5.15 110/317] arm64: dts: renesas: r8a779a0: Update to
 R-Car Gen4 compatible values

Hi Sasha,

On Mon, Mar 25, 2024 at 12:36 AM Sasha Levin <sashal@...nel.org> wrote:
> From: Geert Uytterhoeven <geert+renesas@...der.be>
>
> [ Upstream commit a1721bbbdb5c6687d157f8b8714bba837f6028ac ]
>
> Despite the name, R-Car V3U is the first member of the R-Car Gen4
> family.  Hence update the compatible properties in various device nodes
> to include family-specific compatible values for R-Car Gen4 instead of
> R-Car Gen3:
>   - DMAC,
>   - (H)SCIF,
>   - I2C,
>   - IPMMU,
>   - WDT.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> Reviewed-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> Link: https://lore.kernel.org/r/73cea9d5e1a6639422c67e4df4285042e31c9fd5.1651497071.git.geert+renesas@glider.be
> Stable-dep-of: 0c51912331f8 ("arm64: dts: renesas: r8a779a0: Correct avb[01] reg sizes")
> Signed-off-by: Sasha Levin <sashal@...nel.org>
> ---
>  arch/arm64/boot/dts/renesas/r8a779a0.dtsi | 24 +++++++++++------------
>  1 file changed, 12 insertions(+), 12 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/renesas/r8a779a0.dtsi b/arch/arm64/boot/dts/renesas/r8a779a0.dtsi
> index 26899fb768a73..c7d1b79692c11 100644
> --- a/arch/arm64/boot/dts/renesas/r8a779a0.dtsi
> +++ b/arch/arm64/boot/dts/renesas/r8a779a0.dtsi
> @@ -583,7 +583,7 @@ hscif3: serial@...a0000 {
>
>                 avb0: ethernet@...00000 {
>                         compatible = "renesas,etheravb-r8a779a0",
> -                                    "renesas,etheravb-rcar-gen3";
> +                                    "renesas,etheravb-rcar-gen4";

This change will break Ethernet, as the Renesas EtherAVB driver in
v5.15.x does not handle "renesas,etheravb-rcar-gen4" yet.

That can be fixed by also backporting commit 949f252a8594a860
("net: ravb: Add R-Car Gen4 support") in v6.1.

>                         reg = <0 0xe6800000 0 0x800>;
>                         interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
>                                      <GIC_SPI 257 IRQ_TYPE_LEVEL_HIGH>,

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68korg

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