linux-kernel - Re: [PATCH 2/2] arm64: allwinner: a64: add device tree for SOPINE on Pine64 Clusterboard

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Date:   Sat, 19 Nov 2022 18:14:59 +0000
From:   Andre Przywara <andre.przywara@....com>
To:     Renze Nicolai <renze@...lus.nl>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Maxime Ripard <maxime@...no.tech>,
        Conley Lee <conleylee@...mail.com>,
        Andrew Lunn <andrew@...n.ch>, krzysztof.kozlowski@...aro.org,
        linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 2/2] arm64: allwinner: a64: add device tree for SOPINE
 on Pine64 Clusterboard

On Sat, 19 Nov 2022 13:31:59 +0100
Renze Nicolai <renze@...lus.nl> wrote:

> The Pine64 SOPINE Clusterboard is a mini-ITX sized board capable
> of hosting up-to 7 SOPINE modules. It is largely compatible
> with the SOPINE baseboard but it omits most of the in- and
> output interfaces. Also The Clusterboard needs a tx delay
> of 500ps for ethernet to work.
> 
> Add a device tree for SOPINE on the Pine64 Clusterboard.
> 
> Signed-off-by: Renze Nicolai <renze@...lus.nl>
> ---
>  arch/arm64/boot/dts/allwinner/Makefile           |  1 +
>  .../allwinner/sun50i-a64-sopine-clusterboard.dts | 16 ++++++++++++++++
>  2 files changed, 17 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-a64-sopine-
> clusterboard.dts
> 
> diff --git a/arch/arm64/boot/dts/allwinner/Makefile b/arch/arm64/boot/dts/
> allwinner/Makefile
> index 6a96494a2e0a..15b011d1aaea 100644
> --- a/arch/arm64/boot/dts/allwinner/Makefile
> +++ b/arch/arm64/boot/dts/allwinner/Makefile
> @@ -15,6 +15,7 @@ dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pinephone-1.2.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pinetab.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pinetab-early-adopter.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-sopine-baseboard.dtb
> +dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-sopine-clusterboard.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-teres-i.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a100-allwinner-perf1.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-h5-bananapi-m2-plus.dtb
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-sopine-clusterboard.dts 
> b/arch/arm64/boot/dts/allwinner/sun50i-a64-sopine-clusterboard.dts
> new file mode 100644
> index 000000000000..f75325d43d76
> --- /dev/null
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-sopine-clusterboard.dts
> @@ -0,0 +1,16 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +// Copyright (c) 2022 Renze Nicolai <renze@...lus.nl>
> +
> +/dts-v1/;

Since you include a complete .dts (not a .dtsi) below, you don't need
the dts-v1 tag, as this is provided by the baseboard.dts. That's the
same situation as with the Pine64 LTS.

Cheers,
Andre

> +
> +#include "sun50i-a64-sopine-baseboard.dts"
> +
> +/ {
> +	model = "SOPINE with clusterboard";
> +	compatible = "pine64,sopine-clusterboard", "pine64,sopine",
> +		     "allwinner,sun50i-a64";
> +};
> +
> +&emac {
> +	allwinner,tx-delay-ps = <500>;
> +};