linux-kernel - Re: [PATCH 3/5] ARM: dts: sun8i: s3: Add dtsi for the Elimo Impetus SoM

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Message-ID: <20201029100936.GC460689@aptenodytes>
Date:   Thu, 29 Oct 2020 11:09:36 +0100
From:   Paul Kocialkowski <paul.kocialkowski@...tlin.com>
To:     Matteo Scordino <matteo.scordino@...il.com>
Cc:     mripard@...nel.org, wens@...e.org, robh+dt@...nel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/5] ARM: dts: sun8i: s3: Add dtsi for the Elimo Impetus
 SoM

Hi,

On Thu 29 Oct 20, 02:19, Matteo Scordino wrote:
> The Elimo Engineering Impetus is an Open Source Hardware System-on-Module
> based on the SoChip S3 SoC.
> 
> It is meant for integration into carrier boards or, more generally,
> larger designs, and uses an M2 connector to facilitate that.
> 
> Interfaces on the M.2/NGFF 42mm connector:
> WiFi IEEE 802. 11abgn (on-module Realtek)
> Bluetooth 4.2/BLE (on-module Realtek)
> RGB LCD Interface (on-module connector)
> MIPI Camera Interface (on-module connector)
> IEEE 802. 3u Ethernet MAC (external connecto)
> USB2.0 (Host, Device, OTG) (external connector)
> Audio Line In/Out (external connector)
> 
> Signed-off-by: Matteo Scordino <matteo.scordino@...il.com>
> ---
>  arch/arm/boot/dts/sun8i-s3-elimo-impetus.dtsi | 51 +++++++++++++++++++
>  1 file changed, 51 insertions(+)
>  create mode 100644 arch/arm/boot/dts/sun8i-s3-elimo-impetus.dtsi
> 
> diff --git a/arch/arm/boot/dts/sun8i-s3-elimo-impetus.dtsi b/arch/arm/boot/dts/sun8i-s3-elimo-impetus.dtsi
> new file mode 100644
> index 000000000000..3550125cf334
> --- /dev/null
> +++ b/arch/arm/boot/dts/sun8i-s3-elimo-impetus.dtsi
> @@ -0,0 +1,51 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (C) 2020 Matteo Scordino <matteo@...mo.io>
> + */
> +
> +/dts-v1/;
> +#include "sun8i-v3.dtsi"
> +#include "sunxi-common-regulators.dtsi"
> +
> +/ {
> +	model = "Elimo Impetus SoM";
> +	compatible = "elimo,impetus", "sochip,s3", "allwinner,sun8i-s3";

I'm wondering what to do about the SoC compatibles here:
- Do we really need the "sochip,s3" compatible, as it seems redundant with
  "allwinner,sun8i-s3"?
- Could we add a "allwinner,sun8i-v3" compatible at the end since there is no
  functional difference between the two?

Another thing is that we should probably add "allwinner,sun8i-v3" to
mach-sunxi/sunxi.c so that it's matched by the DT_MACHINE_START.

If that seems agreeable, I can craft a patch for the latter.

What do you think?

The rest of the dt looks good to me :)

Cheers,

Paul

> +
> +	aliases {
> +		serial0 = &uart0;
> +		serial1 = &uart1;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:115200n8";
> +	};
> +};
> +
> +&mmc0 {
> +	broken-cd;
> +	bus-width = <4>;
> +	vmmc-supply = <&reg_vcc3v3>;
> +	status = "okay";
> +};
> +
> +&uart0 {
> +	pinctrl-0 = <&uart0_pb_pins>;
> +	pinctrl-names = "default";
> +	status = "okay";
> +};
> +
> +&uart1 {
> +	pinctrl-0 = <&uart1_pg_pins>;
> +	pinctrl-names = "default";
> +	status = "okay";
> +};
> +
> +&usb_otg {
> +	dr_mode = "otg";
> +	status = "okay";
> +};
> +
> +&usbphy {
> +	usb0_id_det-gpio = <&pio 5 6 GPIO_ACTIVE_HIGH>;
> +	status = "okay";
> +};
> -- 
> 2.20.1
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

-- 
Paul Kocialkowski, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com

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