linux-kernel - Re: [PATCH v4 2/2] arm64: dts: meson-g12a: add initial g12a s905d2 SoC DT support

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Date:   Thu, 20 Sep 2018 09:54:35 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Jianxin Pan <jianxin.pan@...ogic.com>,
        Kevin Hilman <khilman@...libre.com>,
        linux-amlogic@...ts.infradead.org
Cc:     Rob Herring <robh+dt@...nel.org>,
        Jerome Brunet <jbrunet@...libre.com>,
        Carlo Caione <carlo@...one.org>, Jian Hu <jian.hu@...ogic.com>,
        Yixun Lan <yixun.lan@...ogic.com>,
        Hanjie Lin <hanjie.lin@...ogic.com>,
        Qiufang Dai <qiufang.dai@...ogic.com>,
        Victor Wan <victor.wan@...ogic.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/2] arm64: dts: meson-g12a: add initial g12a s905d2
 SoC DT support

On 20/09/2018 09:09, Jianxin Pan wrote:
> Try to add basic DT support for the Amlogic's Meson-G12A S905D2 SoC,
> which describe components as follows: Reserve Memory, CPU, GIC, IRQ,
> Timer, UART. It's capable of booting up into the serial console.
> 
> Signed-off-by: Jianxin Pan <jianxin.pan@...ogic.com>
> Reviewed-by: Jerome Brunet <jbrunet@...libre.com>
> ---
>  arch/arm64/boot/dts/amlogic/Makefile            |   1 +
>  arch/arm64/boot/dts/amlogic/meson-g12a-u200.dts |  22 +++
>  arch/arm64/boot/dts/amlogic/meson-g12a.dtsi     | 172 ++++++++++++++++++++++++
>  3 files changed, 195 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/amlogic/meson-g12a-u200.dts
>  create mode 100644 arch/arm64/boot/dts/amlogic/meson-g12a.dtsi
> 
> diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
> index a97c0e2..c31f29d6 100644
> --- a/arch/arm64/boot/dts/amlogic/Makefile
> +++ b/arch/arm64/boot/dts/amlogic/Makefile
> @@ -1,5 +1,6 @@
>  # SPDX-License-Identifier: GPL-2.0
>  dtb-$(CONFIG_ARCH_MESON) += meson-axg-s400.dtb
> +dtb-$(CONFIG_ARCH_MESON) += meson-g12a-u200.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-nanopi-k2.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-nexbox-a95x.dtb
>  dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-odroidc2.dtb
> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12a-u200.dts b/arch/arm64/boot/dts/amlogic/meson-g12a-u200.dts
> new file mode 100644
> index 0000000..d267a37
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/meson-g12a-u200.dts
> @@ -0,0 +1,22 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright (c) 2018 Amlogic, Inc. All rights reserved.
> + */
> +
> +/dts-v1/;
> +
> +#include "meson-g12a.dtsi"
> +
> +/ {
> +	compatible = "amlogic,u200", "amlogic,g12a";
> +	model = "Amlogic Meson G12A U200 Development Board";
> +
> +	aliases {
> +		serial0 = &uart_AO;
> +	};

Hi Jianxin,

Please add the /memory and /chosen nodes.

+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x0 0x0 0x40000000>;
+	};

Thanks,
Neil


> +};
> +
> +&uart_AO {
> +	status = "okay";
> +};
> +
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