linux-kernel - Re: [PATCH 2/2] arm64: dts: mediatek: Add initial MT7981B and Xiaomi AX3000T

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Date: Wed, 10 Jan 2024 14:38:36 +0100
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Rafał Miłecki <zajec5@...il.com>,
 Matthias Brugger <matthias.bgg@...il.com>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>
Cc: Daniel Golle <daniel@...rotopia.org>, Hsin-Yi Wang <hsinyi@...omium.org>,
 Nícolas F . R . A . Prado <nfraprado@...labora.com>,
 jason-ch chen <Jason-ch.Chen@...iatek.com>,
 Macpaul Lin <macpaul.lin@...iatek.com>, Sean Wang <sean.wang@...iatek.com>,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
 Rafał Miłecki <rafal@...ecki.pl>
Subject: Re: [PATCH 2/2] arm64: dts: mediatek: Add initial MT7981B and Xiaomi
 AX3000T

Il 10/01/24 10:51, Rafał Miłecki ha scritto:
> From: Rafał Miłecki <rafal@...ecki.pl>
> 
> MT7981B (AKA MediaTek Filogic 820) is a dual-core ARM Cortex-A53 SoC.
> One of market devices using this SoC is Xiaomi AX3000T.
> 
> This is initial contribution with basic SoC support. More hardware block
> will get added later. Some will need their bindings (like auxadc).
> 
> Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
> ---
>   arch/arm64/boot/dts/mediatek/Makefile         |   1 +
>   .../dts/mediatek/mt7981b-xiaomi-ax3000t.dts   |  15 +++
>   arch/arm64/boot/dts/mediatek/mt7981b.dtsi     | 108 ++++++++++++++++++
>   3 files changed, 124 insertions(+)
>   create mode 100644 arch/arm64/boot/dts/mediatek/mt7981b-xiaomi-ax3000t.dts
>   create mode 100644 arch/arm64/boot/dts/mediatek/mt7981b.dtsi
> 
> diff --git a/arch/arm64/boot/dts/mediatek/Makefile b/arch/arm64/boot/dts/mediatek/Makefile
> index 0a189d5d8006..8bff11acfe1f 100644
> --- a/arch/arm64/boot/dts/mediatek/Makefile
> +++ b/arch/arm64/boot/dts/mediatek/Makefile
> @@ -8,6 +8,7 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += mt6797-evb.dtb
>   dtb-$(CONFIG_ARCH_MEDIATEK) += mt6797-x20-dev.dtb
>   dtb-$(CONFIG_ARCH_MEDIATEK) += mt7622-rfb1.dtb
>   dtb-$(CONFIG_ARCH_MEDIATEK) += mt7622-bananapi-bpi-r64.dtb
> +dtb-$(CONFIG_ARCH_MEDIATEK) += mt7981b-xiaomi-ax3000t.dtb
>   dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-bananapi-bpi-r3.dtb
>   dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-bananapi-bpi-r3-emmc.dtbo
>   dtb-$(CONFIG_ARCH_MEDIATEK) += mt7986a-bananapi-bpi-r3-nand.dtbo
> diff --git a/arch/arm64/boot/dts/mediatek/mt7981b-xiaomi-ax3000t.dts b/arch/arm64/boot/dts/mediatek/mt7981b-xiaomi-ax3000t.dts
> new file mode 100644
> index 000000000000..a314c3e05e50
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt7981b-xiaomi-ax3000t.dts
> @@ -0,0 +1,15 @@
> +// SPDX-License-Identifier: GPL-2.0-only OR MIT
> +
> +/dts-v1/;
> +
> +#include "mt7981b.dtsi"
> +
> +/ {
> +	compatible = "xiaomi,ax3000t", "mediatek,mt7981b";
> +	model = "Xiaomi AX3000T";
> +
> +	memory@...00000 {
> +		reg = <0 0x40000000 0 0x10000000>;
> +		device_type = "memory";
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/mediatek/mt7981b.dtsi b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
> new file mode 100644
> index 000000000000..ce878ad55204
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
> @@ -0,0 +1,108 @@
> +// SPDX-License-Identifier: GPL-2.0-only OR MIT
> +
> +#include <dt-bindings/clock/mediatek,mt7981-clk.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +/ {
> +	compatible = "mediatek,mt7981b";
> +	interrupt-parent = <&gic>;
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		cpu@0 {
> +			compatible = "arm,cortex-a53";
> +			reg = <0x0>;
> +			device_type = "cpu";
> +			enable-method = "psci";
> +		};
> +
> +		cpu@1 {
> +			compatible = "arm,cortex-a53";
> +			reg = <0x1>;
> +			device_type = "cpu";
> +			enable-method = "psci";
> +		};
> +	};
> +
> +	oscillator-40m {
> +		compatible = "fixed-clock";
> +		clock-frequency = <40000000>;
> +		clock-output-names = "clkxtal";
> +		#clock-cells = <0>;
> +	};
> +
> +	psci {
> +		compatible = "arm,psci-0.2";

PSCI 0.2? I invite you to check a kernel log for a string like this one:

`PSCIv%d.%d detected in firmware`
..because of course if it says v1.0, this should be "arm,psci-1.0".

This is just a nitpick anyway, so you can already get my

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

P.S.: but please, confirm or deny that PSCI thing ASAP :-)
P.P.S.: For next time - I'd be happy if you could add a cover letter to your
patch series..!

Cheers,
Angelo