linux-kernel - Re: [PATCH 3/4] arm64: dts: mediatek: add device-tree for Genio 720-EVK board

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Message-ID: <87db9b43-ceae-47b9-9435-9fa297054fc2@kernel.org>
Date: Wed, 3 Dec 2025 21:25:53 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Jiri Slaby <jirislaby@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
 Sean Wang <sean.wang@...iatek.com>
Cc: kernel@...labora.com, linux-kernel@...r.kernel.org,
 linux-serial@...r.kernel.org, devicetree@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH 3/4] arm64: dts: mediatek: add device-tree for Genio
 720-EVK board

On 03/12/2025 14:59, Louis-Alexis Eyraud wrote:
> Add support for MediaTek MT8189 SoC and its variants, and a device-tree
> for the basic hardware enablement of the Genio 720-EVK board, based on
> MT8391 SoC.
> 
> MT8391 SoC is a variant of MT8189 SoC with a difference for the Arm
> Cortex-A78 CPU core maximum frequency (2.6 Ghz for MT8391, 3 Ghz for
> MT8189). MT8391 hardware register maps are identical to MT8189.

Subject: drop redundant "device-tree for" (not mentioning not correct
name even...).

> 
> The Genio 720-EVK board has following features:
>   - MT8391 SoC
>   - MT6365 PMIC
>   - MT6319 Buck IC
>   - MT6375 Charger IC
>   - 8GB LPDDR5 RAM
>   - 64GB eMMC 5.1
>   - 128GB UFS
>   - 20V DC Jack
>   - USB Type-C Power Adapter
>   - Micro SD card slot
>   - Push Button x 4 (Power, Reset, Download and Home Key)
>   - LED x 3 (System Power, Reset, DC-IN Power)
>   - USB Type-C Connector (USB 3.2) x 2
>   - USB Type-C Connector (USB 2.0) x 1
>   - 3.5mm Earphone Jack x 1 (with Microphone Input)
>   - 3.5mm Line Out Audio Jack x 1
>   - Analog Microphone x 1
>   - Digital Microphone x 2
>   - Gigabit Ethernet with RJ45 connector
>   - DP x 1 (Mode over USB Type-C)
>   - LVDS port x 1
>   - eDP port x 1
>   - UART x2 with serial-to-usb converters and USB Type-C connectors
>   - UART Port x 2 on Pin Header
>   - M.2 Slot x 2
>   - I2C Capacitive Touch Pad
>   - 4-Lane DSI x 1
>   - 4-Data Lane CSI x 2
>   - I2S Pin header
>   - 40-Pin 2.54mm Pin Header x 1
>   - CAN Bus x 1 (RS232 Connector)
> 
> Signed-off-by: Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
> ---
>  arch/arm64/boot/dts/mediatek/Makefile              |   1 +
>  arch/arm64/boot/dts/mediatek/mt8189.dtsi           | 860 +++++++++++++++++++++
>  .../boot/dts/mediatek/mt8391-genio-720-evk.dts     |  15 +
>  .../boot/dts/mediatek/mt8391-genio-common.dtsi     | 555 +++++++++++++
>  4 files changed, 1431 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/Makefile b/arch/arm64/boot/dts/mediatek/Makefile
> index c5fd6191a925ad8fcea401712f7a686e8b0a57c8..e3b63085c0608b86dc8638c9d5e0b73441e9ed7b 100644
> --- a/arch/arm64/boot/dts/mediatek/Makefile
> +++ b/arch/arm64/boot/dts/mediatek/Makefile
> @@ -110,6 +110,7 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += mt8395-genio-1200-evk.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt8395-genio-1200-evk-ufs.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt8390-genio-700-evk.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt8390-grinn-genio-700-sbc.dtb
> +dtb-$(CONFIG_ARCH_MEDIATEK) += mt8391-genio-720-evk.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt8395-kontron-3-5-sbc-i1200.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt8395-radxa-nio-12l.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt8395-radxa-nio-12l-8-hd-panel.dtbo
> diff --git a/arch/arm64/boot/dts/mediatek/mt8189.dtsi b/arch/arm64/boot/dts/mediatek/mt8189.dtsi
> new file mode 100644
> index 0000000000000000000000000000000000000000..bf8a232bcaf10cdf4c590109aea68c9a3e82cc42
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt8189.dtsi
> @@ -0,0 +1,860 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +/*
> + * Copyright (c) 2025 MediaTek Inc.
> + *
> + * Copyright (c) 2025 Collabora Ltd.
> + * Author: Louis-Alexis Eyraud <louisalexis.eyraud@...labora.com>
> + */
> +
> +#include <dt-bindings/clock/mediatek,mt8189-clk.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/interrupt-controller/irq.h>
> +
> +/ {
> +	compatible = "mediatek,mt8189";
> +	interrupt-parent = <&gic>;
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +
> +	aliases {
> +		i2c0 = &i2c0;
> +		i2c1 = &i2c1;
> +		i2c2 = &i2c2;
> +		i2c3 = &i2c3;
> +		i2c4 = &i2c4;
> +		i2c5 = &i2c5;
> +		i2c6 = &i2c6;
> +		i2c7 = &i2c7;
> +		i2c8 = &i2c8;
> +		mmc0 = &mmc0;
> +		mmc1 = &mmc1;
> +		serial0 = &uart0;

None of above are aliases of the soc. Please move them to the board,
because these are properties of the board currently (we did not finish
the discussion about soc-aliases, so it cannot be used as reason for above).



> +	};
> +
> +	clk32k: oscillator-clk32k {

Either oscillator or clock (clk). Not both. "clock-clk" makes no sense
and this is implied by oscillator.

Please use name for all fixed clocks which matches current format
recommendation: 'clock-<freq>' (see also the pattern in the binding for
any other options).

https://web.git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/clock/fixed-clock.yaml


Best regards,
Krzysztof