linux-kernel - Re: [RFC PATCH v3 2/2] arm64: dts: renesas: ulcb-kf: add node for GNSS

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Date: Fri, 26 Jan 2024 15:24:48 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Wolfram Sang <wsa+renesas@...g-engineering.com>
Cc: linux-renesas-soc@...r.kernel.org, Magnus Damm <magnus.damm@...il.com>, 
	Rob Herring <robh+dt@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v3 2/2] arm64: dts: renesas: ulcb-kf: add node for GNSS

Hi Wolfram,

On Wed, Jan 17, 2024 at 2:18 PM Wolfram Sang
<wsa+renesas@...g-engineering.com> wrote:
> Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
> ---
> Changes since last version:
>
> * use 'reg_3p3v' instead of custom regulator

Thanks for the update!

> --- a/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
> +++ b/arch/arm64/boot/dts/renesas/ulcb-kf.dtsi
> @@ -392,6 +392,13 @@ &scif1 {
>         pinctrl-names = "default";
>
>         status = "okay";
> +
> +       gnss {
> +               compatible = "u-blox,neo-m8";
> +               reset-gpios = <&gpio_exp_75 6 GPIO_ACTIVE_LOW>;
> +               vcc-supply = <&reg_3p3v>;
> +               current-speed = <9600>;
> +       };
>  };
>
>  &sdhi3 {

LGTM, so
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>

Before I queue this, I have one remaining question.
The device is also connected to I2C bus i2c@7 aka AUDIO_S{DA,CL}.
Can it be used over I2C too? Is there some strapping to select the
interface used? I couldn't find that in the documentation.
(It does support clock stretching! ;-)

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