linux-kernel - Re: [PATCH 1/3] ARM: dts: r8a7742-iwg21d-q7: Enable HSUSB, USB2.0 and XHCI

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Date:   Fri, 29 May 2020 16:03:45 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Prabhakar <prabhakar.csengg@...il.com>
Subject: Re: [PATCH 1/3] ARM: dts: r8a7742-iwg21d-q7: Enable HSUSB, USB2.0 and XHCI

Hi Prabhakar,

On Wed, May 27, 2020 at 10:24 PM Lad Prabhakar
<prabhakar.mahadev-lad.rj@...renesas.com> wrote:
> Enable support for HSUB, USB2.0 and xhci on iWave RZ/G1H carrier board.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> Reviewed-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@...renesas.com>

Thanks for your patch!

> --- a/arch/arm/boot/dts/r8a7742-iwg21d-q7.dts
> +++ b/arch/arm/boot/dts/r8a7742-iwg21d-q7.dts

> @@ -88,6 +114,21 @@
>                 function = "sdhi2";
>                 power-source = <1800>;
>         };
> +
> +       usb0_pins: usb0 {
> +               groups = "usb0";
> +               function = "usb0";
> +       };
> +
> +       usb1_pins: usb1 {
> +               groups = "usb1";
> +               function = "usb1";
> +       };
> +
> +       usb2_pins: usb2 {
> +               groups = "usb2";
> +               function = "usb2";
> +       };
>  };

Looking at the schematics[*], I'm having a hard time making some sense
out of this.

GP5_21 (USB1_OVC) seems to be GPIO_AVB_SEL, and
GP5_22 (USB2_PWEN) is GPIO_SD1_LED?

I must be missing something?

[*] *RZ_G1H_SOM.pdf, *RZ_G1M_G1N_G1H_Q7 carrierBoard.pdf

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