linux-kernel - Re: [PATCH v4 2/2] arm64: dts: freescale: add NXP FRDM-IMX91S board support

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Message-ID: <aXOTzHaLn6hFdMtR@lizhi-Precision-Tower-5810>
Date: Fri, 23 Jan 2026 10:29:16 -0500
From: Frank Li <Frank.li@....com>
To: Yanan Yang <yanan.yang@....com>
Cc: 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>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, qijian.guo@....com,
	justin.jiang@....com, Lei Xu <lei.xu@....com>,
	Xiaofeng Wei <xiaofeng.wei@....com>
Subject: Re: [PATCH v4 2/2] arm64: dts: freescale: add NXP FRDM-IMX91S board
 support

On Fri, Jan 23, 2026 at 03:42:00PM +0900, Yanan Yang wrote:
> Add DeviceTree support for the NXP FRDM-IMX91S development board based
> on the i.MX91 SoC. FRDM-IMX91S is a cost-optimized variant of FRDM-IMX91
> and differs in memory, storage, Ethernet, and PMIC configuration:
>
> - 512MB LPDDR4 (FRDM-IMX91 uses 1GB)
> - 256MB FlexSPI-NAND (FRDM-IMX91 uses 8GB eMMC)
> - Single GbE port (FRDM-IMX91 has dual GbE)
> - PMIC PF9453 (FRDM-IMX91 uses PCA9451A)
>
> This DT enables:
> - ADC1
> - UART1 and UART5
> - I2C bus and children nodes
> - USB and related nodes
> - uSDHC1 and uSDHC2
> - FlexSPI NAND flash
> - Watchdog3
> - Ethernet (eqos)
> - FlexCAN
> - MQS
>
> Link: https://www.nxp.com/design/design-center/development-boards-and-designs/FRDM-IMX91S
> (FRDM-IMX91S board page)
> Link: https://www.nxp.com/design/design-center/development-boards-and-designs/FRDM-IMX91
> (FRDM-IMX91 board page)
>
> Co-developed-by: Lei Xu <lei.xu@....com>
> Signed-off-by: Lei Xu <lei.xu@....com>
> Co-developed-by: Xiaofeng Wei <xiaofeng.wei@....com>
> Signed-off-by: Xiaofeng Wei <xiaofeng.wei@....com>
> Signed-off-by: Yanan Yang <yanan.yang@....com>
>
> ---
...
> +
> +&iomuxc {
> +	bootph-pre-ram;
> +	bootph-some-ram;
> +
> +	pinctrl_eqos: eqosgrp {
> +		fsl,pins = <
> +			MX91_PAD_ENET1_MDC__ENET1_MDC                           0x57e
> +			MX91_PAD_ENET1_MDIO__ENET_QOS_MDIO                      0x57e
> +			MX91_PAD_ENET1_RD0__ENET_QOS_RGMII_RD0                  0x57e
> +			MX91_PAD_ENET1_RD1__ENET_QOS_RGMII_RD1                  0x57e
> +			MX91_PAD_ENET1_RD2__ENET_QOS_RGMII_RD2                  0x57e
> +			MX91_PAD_ENET1_RD3__ENET_QOS_RGMII_RD3                  0x57e
> +			MX91_PAD_ENET1_RXC__ENET_QOS_RGMII_RXC                  0x5fe
> +			MX91_PAD_ENET1_RX_CTL__ENET_QOS_RGMII_RX_CTL            0x57e
> +			MX91_PAD_ENET1_TD0__ENET_QOS_RGMII_TD0                  0x57e
> +			MX91_PAD_ENET1_TD1__ENET1_RGMII_TD1                     0x57e
> +			MX91_PAD_ENET1_TD2__ENET_QOS_RGMII_TD2                  0x57e
> +			MX91_PAD_ENET1_TD3__ENET_QOS_RGMII_TD3                  0x57e
> +			MX91_PAD_ENET1_TXC__CCM_ENET_QOS_CLOCK_GENERATE_TX_CLK  0x5fe
> +			MX91_PAD_ENET1_TX_CTL__ENET_QOS_RGMII_TX_CTL            0x57e
> +		>;
> +	};

Plese usb tab before number.

Frank
> +
...
> +&wdog3 {
> +	pinctrl-0 = <&pinctrl_wdog>;
> +	pinctrl-names = "default";
> +	fsl,ext-reset-output;
> +	status = "okay";
> +};
>
> --
> 2.43.0
>