linux-kernel - Re: [PATCH 6/6] arm64: dts: renesas: rzt2h-n2h-evk: Enable USB2.0 support

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Message-ID: <CAMuHMdW06XZs_xj7mEnVU0C-W4Yk550nd-nkg+zXQHVqR-huUg@mail.gmail.com>
Date: Thu, 4 Sep 2025 09:51:02 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
Cc: Magnus Damm <magnus.damm@...il.com>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	linux-renesas-soc@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Biju Das <biju.das.jz@...renesas.com>, 
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH 6/6] arm64: dts: renesas: rzt2h-n2h-evk: Enable USB2.0 support

Hi Prabhakar,

On Wed, 3 Sept 2025 at 21:21, Lad, Prabhakar <prabhakar.csengg@...il.com> wrote:
> On Wed, Sep 3, 2025 at 4:04 PM Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> > On Thu, 21 Aug 2025 at 18:19, Prabhakar <prabhakar.csengg@...il.com> wrote:
> > > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > >
> > > Enable USB2.0 support on RZ/T2H and RZ/N2H EVKs.
> > >
> > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

> > > --- a/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
> > > +++ b/arch/arm64/boot/dts/renesas/r9a09g087m44-rzn2h-evk.dts
> > > @@ -33,6 +33,33 @@
> > >   */
> > >  #define SD1_MICRO_SD   1
> > >
> > > +/*
> > > + * USB Pin Configuration:
> > > + *
> > > + * This board is equipped with three USB connectors: Type-A (CN7), Mini-B (CN8),
> > > + * and Micro-AB (CN9). The RZ/N2H SoC has a single USB channel, so either the USB
> > > + * host interface or the USB function interface can be used, but not both at the
> > > + * same time.
> > > + *
> > > + * By default, the Type-A (CN7) and Mini-B (CN8) connectors are enabled.
> > > + * Configure the switches as follows:
> > > + *   - P02_2 - P02_3 (control signals for USB power supply): DSW2[6] = OFF;
> >
> > s/DSW2[6]/DSW2[5]/?
> >
> The above is correct,
>
> DSW2[5] is OFF, P00_0 to P00_2 are connected to BSC2(CN43) and GPT0(CN49).
> DSW2[5] is ON, P00_0 to P00_2 are used as control signals for the USB
> power-supply IC.
>
> But we are using P02_2 and P02_3
> DSW2[5] is OFF, P01_0, P01_2, P01_4 to P01_7, and P02_0 to P02_3 are
> connected to ENCIF0(CN44) and GPT0(CN49), and used as control signals
> for the USB power-supply IC.

Thanks, I stand corrected.

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