linux-kernel - Re: [PATCH v4 2/2] arm64: dts: imx8mp: Add TechNexion EDM-G-IMX8M-PLUS SOM on WB-EDM-G carrier board

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Message-ID: <9d00b76e-b13b-45cf-a95b-65727fa07300@kernel.org>
Date: Mon, 18 Aug 2025 10:54:58 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Richard Hu <richard.hu@...hnexion.com>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
 Sascha Hauer <s.hauer@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
 Ray Chang <ray.chang@...hnexion.com>
Subject: Re: [PATCH v4 2/2] arm64: dts: imx8mp: Add TechNexion
 EDM-G-IMX8M-PLUS SOM on WB-EDM-G carrier board

On 24/07/2025 04:34, Richard Hu wrote:
> Add support for TechNexion EDM-G-IMX8M-PLUS SOM and WB-EDM-G carrier board.
> Key interfaces include:
> - Gigabit Ethernet
> - USB 3.0
> - I2S, UART, SPI, I2C, PWM, GPIO
> 
> Signed-off-by: Richard Hu <richard.hu@...hnexion.com>
> Signed-off-by: Ray Chang <ray.chang@...hnexion.com>
> ---
>  arch/arm64/boot/dts/freescale/Makefile            |   1 +
>  arch/arm64/boot/dts/freescale/imx8mp-edm-g-wb.dts | 372 ++++++++++
>  arch/arm64/boot/dts/freescale/imx8mp-edm-g.dtsi   | 806 ++++++++++++++++++++++
>  3 files changed, 1179 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
> index 0b473a23d120..b56c866d4a9d 100644
> --- a/arch/arm64/boot/dts/freescale/Makefile
> +++ b/arch/arm64/boot/dts/freescale/Makefile
> @@ -201,6 +201,7 @@ dtb-$(CONFIG_ARCH_MXC) += imx8mp-dhcom-drc02.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-dhcom-pdk2.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-dhcom-pdk3.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-dhcom-picoitx.dtb
> +dtb-$(CONFIG_ARCH_MXC) += imx8mp-edm-g-wb.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-evk.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-icore-mx8mp-edimm2.2.dtb
>  dtb-$(CONFIG_ARCH_MXC) += imx8mp-iota2-lumpy.dtb
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-edm-g-wb.dts b/arch/arm64/boot/dts/freescale/imx8mp-edm-g-wb.dts
> new file mode 100644
> index 000000000000..5441328afb20
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-edm-g-wb.dts
> @@ -0,0 +1,372 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright 2024 TechNexion Ltd.
> + *
> + * Author: Ray Chang <ray.chang@...hnexion.com>
> + */
> +
> +/dts-v1/;
> +
> +#include "imx8mp-edm-g.dtsi"
> +
> +/ {
> +	compatible = "technexion,edm-g-imx8mp-wb", "technexion,edm-g-imx8mp", "fsl,imx8mp";
> +	model = "TechNexion EDM-G-IMX8MP SOM on WB-EDM-G";
> +
> +	connector {
> +		compatible = "usb-c-connector";
> +		data-role = "dual";
> +		label = "USB-C";
> +
> +		ports {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			port@0 {
> +				reg = <0>;
> +
> +				hs_ep: endpoint {
> +					remote-endpoint = <&usb3_hs_ep>;
> +				};
> +			};
> +
> +			port@1 {
> +				reg = <1>;
> +
> +				ss_ep: endpoint {
> +					remote-endpoint = <&hd3ss3220_in_ep>;
> +				};
> +			};
> +		};
> +	};
> +
> +	leds {
> +		compatible = "gpio-leds";
> +
> +		led {
> +			default-state = "on";
> +			gpios = <&expander2 1 GPIO_ACTIVE_HIGH>;
> +			label = "gpio-led";
> +		};
> +	};
> +
> +	native-hdmi-connector {

Just hdmi-connector

Unless there is non-native one?


...

> +

> +	pinctrl_hdmi: hdmigrp {
> +		fsl,pins = <
> +			MX8MP_IOMUXC_HDMI_DDC_SCL__HDMIMIX_HDMI_SCL	0x1c2
> +			MX8MP_IOMUXC_HDMI_DDC_SDA__HDMIMIX_HDMI_SDA	0x1c2
> +			MX8MP_IOMUXC_HDMI_CEC__HDMIMIX_HDMI_CEC		0x10
> +		>;
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-edm-g.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-edm-g.dtsi
> new file mode 100644
> index 000000000000..cc0b37158b0a
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-edm-g.dtsi
> @@ -0,0 +1,806 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)


Odd to see GPL-3.0 (and newer as well). Are you sure this is what you want?

> +/*


...

> +
> +&i2c1 {
> +	clock-frequency = <100000>;
> +	pinctrl-0 = <&pinctrl_i2c1>;
> +	pinctrl-names = "default";
> +	status = "okay";
> +
> +	pmic: pmic@25 {
> +		compatible = "nxp,pca9450c";
> +		reg = <0x25>;
> +		interrupt-parent = <&gpio1>;
> +		interrupts = <3 GPIO_ACTIVE_LOW>;

Wrong define. And the flag is not NONE, either.

You just copied same bug from some very old (5 years?) code.


> +		/* PMIC PCA9450 PMIC_nINT GPIO1_IO3 */
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pinctrl_pmic>;
> +
Best regards,
Krzysztof