Re: [PATCH v4 2/2] arm64: dts: add support for NXP i.MX8MP FRDM board

Joseph Guo
2025-11-10T05:15:51Z

On Sun, Nov 09, 2025 at 04:45:15PM -0500, Rogerio Pimentel wrote:
> The FRDM-i.MX8MP is an NXP development platform based on the i.MX8M Plus
> SoC, featuring a quad Cortex-A53, Cortex-M7 co-processor, 4GB LPDDR4,
> 32GB eMMC, Wi-Fi 6/Bluetooth 5.4/802.15.4 tri-radio, Ethernet, HDMI/MIPI
> display interfaces, camera connectors, and standard expansion headers.
>
> Based on the device tree found in the NXP repository at github
> https://github.com/nxp-imx-support/meta-imx-frdm and on imx8mp-evk
> board kernel mainline device tree.

Hi Rogerio,

I'm maintainer of NXP mainline code for FRDM boards now.
Thanks for your contribution for FRDM boards upstreaming.
The imx8mp frdm board official name is FRDM-IMX8MP,
so please change the name from FRDM-i.MX8MP to FRDM-IMX8MP
in commit message.

The code you refer in meta-imx-frdm is based on 6.6.36 kernel which
is pretty old. Our new code based on 6.12 you can refer this link:
https://github.com/nxp-imx/linux-imx/blob/lf-6.12.y/arch/arm64/boot/dts/freescale/imx8mp-frdm.dts

>
> This is a basic device tree supporting:
>
> - Quad Cortex-A53
> - 4GB LPDDR4 DRAM
> - PCA9450C PMIC with regulators
> - Two NXP PCAL6416 GPIO expanders
> - RGB LEDs via GPIO expander
> - I2C1, I2C2, I2C3 controllers
> - UART2 (console) and UART3 (with RTS/CTS)
> - USDHC3 (8-bit eMMC)
> - SNVS power key (onboard power button)
>
> Signed-off-by: Rogerio Pimentel <rpimentel.silva@gmail.com>
> Signed-off-by: Xiaofeng Wei <xiaofeng.wei@nxp.com>
> ---
>
> Changes in v4:
>
> - Change label pcal6416 to pcal6416_0
>
> Changes in v3:
>
> - Removing the following tags and names added
> on v2 by mistake:
> Reviewed-by: Daniel Baluta <daniel.baluta@gmail.com>
> Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
>
> Changes in v2:
>
> - Fixed dt-binding schema warnings
> - Renamed nodes 'red, green and blue' to
> 'led-0, led-1 and led-2'
> - Renamed led labels 'led-0, led-1 and led-2'
> to 'red, green and blue'
> - Added Reviewed-by and Signed-off-by tags
>
> arch/arm64/boot/dts/freescale/Makefile | 1 +
> arch/arm64/boot/dts/freescale/imx8mp-frdm.dts | 355 ++++++++++++++++++
> 2 files changed, 356 insertions(+)
> create mode 100644 arch/arm64/boot/dts/freescale/imx8mp-frdm.dts
>
> diff --git a/arch/arm64/boot/dts/freescale/Makefile b/arch/arm64/boot/dts/freescale/Makefile
> index 75676b908299..323e98c0cb48 100644
> --- a/arch/arm64/boot/dts/freescale/Makefile
> +++ b/arch/arm64/boot/dts/freescale/Makefile
> @@ -206,6 +206,7 @@ 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-$(CONFIG_ARCH_MXC) += imx8mp-frdm.dtb
> dtb-$(CONFIG_ARCH_MXC) += imx8mp-hummingboard-mate.dtb
> dtb-$(CONFIG_ARCH_MXC) += imx8mp-hummingboard-pro.dtb
> dtb-$(CONFIG_ARCH_MXC) += imx8mp-hummingboard-pulse.dtb
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-frdm.dts b/arch/arm64/boot/dts/freescale/imx8mp-frdm.dts
> new file mode 100644
> index 000000000000..242cce2f2029
> --- /dev/null
> +++ b/arch/arm64/boot/dts/freescale/imx8mp-frdm.dts
> @@ -0,0 +1,355 @@
> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
> +/*
> + * Copyright 2019 NXP
/s/2019/2025
> + */
> +
> +/dts-v1/;
> +
> +#include "imx8mp.dtsi"
> +
> +/ {
> + model = "NXP i.MX8MPlus FRDM board";
> + compatible = "fsl,imx8mp-frdm", "fsl,imx8mp";
model = "NXP FRDM-IMX8MPLUS";
compatible = "fsl,frdm-imx8mp", "fsl,imx8mp";
> +
> + chosen {
> + stdout-path = &uart2;
> + };
> +
> + gpio-leds {
> + compatible = "gpio-leds";
> +
> + led-0 {
> + label = "red";
> + gpios = <&pcal6416_0 13 GPIO_ACTIVE_HIGH>;
> + default-state = "off";
> + };
> +
> + led-1 {
> + label = "green";
> + gpios = <&pcal6416_0 14 GPIO_ACTIVE_HIGH>;
> + default-state = "on";
> + };
> +
> + led-2 {
> + label = "blue";
> + gpios = <&pcal6416_0 15 GPIO_ACTIVE_HIGH>;
> + default-state = "off";
> + };
> + };
> +
> + memory@40000000 {
> + device_type = "memory";
> + reg = <0x0 0x40000000 0 0xc0000000>,
> + <0x1 0x00000000 0 0x40000000>;
> + };
> +};
> +
> +&A53_0 {
> + cpu-supply = <&reg_arm>;
> +};
> +
> +&A53_1 {
> + cpu-supply = <&reg_arm>;
> +};
> +
> +&A53_2 {
> + cpu-supply = <&reg_arm>;
> +};
> +
> +&A53_3 {
> + cpu-supply = <&reg_arm>;
> +};
> +
> +&i2c1 {
> + clock-frequency = <400000>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_i2c1>;
> + status = "okay";
> +
> + pmic@25 {
> + compatible = "nxp,pca9450c";
> + reg = <0x25>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_pmic>;
> + interrupt-parent = <&gpio1>;
> + interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
> +
> + regulators {
> + BUCK1 {
> + regulator-name = "BUCK1";
> + regulator-min-microvolt = <720000>;
> + regulator-max-microvolt = <1000000>;
> + regulator-boot-on;
> + regulator-always-on;
> + regulator-ramp-delay = <3125>;
> + };
> +
> + reg_arm: BUCK2 {
> + regulator-name = "BUCK2";
> + regulator-min-microvolt = <720000>;
> + regulator-max-microvolt = <1025000>;
> + regulator-boot-on;
> + regulator-always-on;
> + regulator-ramp-delay = <3125>;
> + nxp,dvs-run-voltage = <950000>;
> + nxp,dvs-standby-voltage = <850000>;
> + };
> +
> + BUCK4 {
> + regulator-name = "BUCK4";
> + regulator-min-microvolt = <3000000>;
> + regulator-max-microvolt = <3600000>;
> + regulator-boot-on;
> + regulator-always-on;
> + };
> +
> + reg_buck5: BUCK5 {
> + regulator-name = "BUCK5";
> + regulator-min-microvolt = <1650000>;
> + regulator-max-microvolt = <1950000>;
> + regulator-boot-on;
> + regulator-always-on;
> + };
> +
> + BUCK6 {
> + regulator-name = "BUCK6";
> + regulator-min-microvolt = <1045000>;
> + regulator-max-microvolt = <1155000>;
> + regulator-boot-on;
> + regulator-always-on;
> + };
> +
> + LDO1 {
> + regulator-name = "LDO1";
> + regulator-min-microvolt = <1650000>;
> + regulator-max-microvolt = <1950000>;
> + regulator-boot-on;
> + regulator-always-on;
> + };
> +
> + LDO3 {
> + regulator-name = "LDO3";
> + regulator-min-microvolt = <1710000>;
> + regulator-max-microvolt = <1890000>;
> + regulator-boot-on;
> + regulator-always-on;
> + };
> +
> + LDO5 {
> + regulator-name = "LDO5";
> + regulator-min-microvolt = <1800000>;
> + regulator-max-microvolt = <3300000>;
> + regulator-boot-on;
> + regulator-always-on;
> + };
> + };
> + };
> +
> + pcal6416_0: gpio@20 {
> + compatible = "nxp,pcal6416";
> + reg = <0x20>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_pcal6416_0_int>;
> + interrupt-parent = <&gpio3>;
> + interrupts = <16 IRQ_TYPE_LEVEL_LOW>;
> + gpio-line-names = "CSI1_nRST",
> + "CSI2_nRST",
> + "DSI_CTP_RST",
> + "EXT_PWREN1",
> + "CAN_STBY",
> + "EXP_P0_5",
> + "EXP_P0_6",
> + "P0_7",
> + "LVDS0_BLT_EN",
> + "LVDS1_BLT_EN",
> + "LVDS0_CTP_RST",
> + "LVDS1_CTP_RST",
> + "SPK_PWREN",
> + "RLED_GPIO",
> + "GLED_GPIO",
> + "BLED_GPIO";
> + };
> +
> + pcal6416_1: gpio@21 {
> + compatible = "nxp,pcal6416";
> + reg = <0x21>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_pcal6416_1_int>;
> + interrupt-parent = <&gpio2>;
> + interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
> + gpio-line-names = "P0_0",
> + "P0_1",
> + "AUD_nINT",
> + "RTC_nINTA",
> + "USB1_SS_SEL",
> + "USB2_PWR_EN",
> + "SPI_EXP_SEL",
> + "P0_7",
> + "W2_HOST_WAKE_SD_3V3",
> + "W2_HOST_WAKE_BT_3V3",
> + "EXP_WIFI_BT_PDN_3V3",
> + "EXP_BT_RST_3V3",
> + "W2_RST_IND_3V3",
> + "SPI_nINT_3V3",
> + "KEYM_PCIE_nWAKE",
> + "P1_7";
> + };
> +};
> +
> +&i2c2 {
> + clock-frequency = <400000>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_i2c2>;
> + status = "okay";
> +};
> +
> +&i2c3 {
> + clock-frequency = <400000>;
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_i2c3>;
> + status = "okay";
> +};
> +
> +&snvs_pwrkey {
> + status = "okay";
> +};
> +
> +&uart2 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_uart2>;
> + status = "okay";
> +};
> +
> +&uart3 {
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_uart3>;
> + assigned-clocks = <&clk IMX8MP_CLK_UART3>;
> + assigned-clock-parents = <&clk IMX8MP_SYS_PLL1_80M>;
> + uart-has-rtscts;
> + status = "okay";
> +};
> +
> +&usdhc3 {
> + assigned-clocks = <&clk IMX8MP_CLK_USDHC3>;
> + assigned-clock-rates = <400000000>;
> + pinctrl-names = "default", "state_100mhz", "state_200mhz";
> + pinctrl-0 = <&pinctrl_usdhc3>;
> + pinctrl-1 = <&pinctrl_usdhc3_100mhz>;
> + pinctrl-2 = <&pinctrl_usdhc3_200mhz>;
> + bus-width = <8>;
> + non-removable;
> + status = "okay";
> +};
> +
> +&iomuxc {
> + pinctrl_i2c1: i2c1grp {
> + fsl,pins = <
> + MX8MP_IOMUXC_I2C1_SCL__I2C1_SCL 0x400001c2
> + MX8MP_IOMUXC_I2C1_SDA__I2C1_SDA 0x400001c2
> + >;
> + };
> +
> + pinctrl_i2c2: i2c2grp {
> + fsl,pins = <
> + MX8MP_IOMUXC_I2C2_SCL__I2C2_SCL 0x400001c2
> + MX8MP_IOMUXC_I2C2_SDA__I2C2_SDA 0x400001c2
> + >;
> + };
> +
> + pinctrl_i2c3: i2c3grp {
> + fsl,pins = <
> + MX8MP_IOMUXC_I2C3_SCL__I2C3_SCL 0x400001c2
> + MX8MP_IOMUXC_I2C3_SDA__I2C3_SDA 0x400001c2
> + >;
> + };
> +
> + pinctrl_pmic: pmicgrp {
> + fsl,pins = <
> + MX8MP_IOMUXC_GPIO1_IO03__GPIO1_IO03 0x000001c0
> + >;
> + };
> +
> + pinctrl_pcal6416_0_int: pcal6416_0_int_grp {
> + fsl,pins = <
> + MX8MP_IOMUXC_NAND_READY_B__GPIO3_IO16 0x146
> + >;
> + };
> +
> + pinctrl_pcal6416_1_int: pcal6416_1_int_grp {
> + fsl,pins = <
> + MX8MP_IOMUXC_SD1_STROBE__GPIO2_IO11 0x146
> + >;
> + };
> +
> + pinctrl_uart2: uart2grp {
> + fsl,pins = <
> + MX8MP_IOMUXC_UART2_RXD__UART2_DCE_RX 0x140
> + MX8MP_IOMUXC_UART2_TXD__UART2_DCE_TX 0x140
> + >;
> + };
> +
> + pinctrl_uart3: uart3grp {
> + fsl,pins = <
> + MX8MP_IOMUXC_ECSPI1_SCLK__UART3_DCE_RX 0x140
> + MX8MP_IOMUXC_ECSPI1_MOSI__UART3_DCE_TX 0x140
> + MX8MP_IOMUXC_ECSPI1_SS0__UART3_DCE_RTS 0x140
> + MX8MP_IOMUXC_ECSPI1_MISO__UART3_DCE_CTS 0x140
> + >;
> + };
> +
> + pinctrl_usdhc3: usdhc3grp {
> + fsl,pins = <
> + MX8MP_IOMUXC_NAND_WE_B__USDHC3_CLK 0x190
> + MX8MP_IOMUXC_NAND_WP_B__USDHC3_CMD 0x1d0
> + MX8MP_IOMUXC_NAND_DATA04__USDHC3_DATA0 0x1d0
> + MX8MP_IOMUXC_NAND_DATA05__USDHC3_DATA1 0x1d0
> + MX8MP_IOMUXC_NAND_DATA06__USDHC3_DATA2 0x1d0
> + MX8MP_IOMUXC_NAND_DATA07__USDHC3_DATA3 0x1d0
> + MX8MP_IOMUXC_NAND_RE_B__USDHC3_DATA4 0x1d0
> + MX8MP_IOMUXC_NAND_CE2_B__USDHC3_DATA5 0x1d0
> + MX8MP_IOMUXC_NAND_CE3_B__USDHC3_DATA6 0x1d0
> + MX8MP_IOMUXC_NAND_CLE__USDHC3_DATA7 0x1d0
> + MX8MP_IOMUXC_NAND_CE1_B__USDHC3_STROBE 0x190
> + >;
> + };
> +
> + pinctrl_usdhc3_100mhz: usdhc3-100mhzgrp {
> + fsl,pins = <
> + MX8MP_IOMUXC_NAND_WE_B__USDHC3_CLK 0x194
> + MX8MP_IOMUXC_NAND_WP_B__USDHC3_CMD 0x1d4
> + MX8MP_IOMUXC_NAND_DATA04__USDHC3_DATA0 0x1d4
> + MX8MP_IOMUXC_NAND_DATA05__USDHC3_DATA1 0x1d4
> + MX8MP_IOMUXC_NAND_DATA06__USDHC3_DATA2 0x1d4
> + MX8MP_IOMUXC_NAND_DATA07__USDHC3_DATA3 0x1d4
> + MX8MP_IOMUXC_NAND_RE_B__USDHC3_DATA4 0x1d4
> + MX8MP_IOMUXC_NAND_CE2_B__USDHC3_DATA5 0x1d4
> + MX8MP_IOMUXC_NAND_CE3_B__USDHC3_DATA6 0x1d4
> + MX8MP_IOMUXC_NAND_CLE__USDHC3_DATA7 0x1d4
> + MX8MP_IOMUXC_NAND_CE1_B__USDHC3_STROBE 0x194
> + >;
> + };
> +
> + pinctrl_usdhc3_200mhz: usdhc3-200mhzgrp {
> + fsl,pins = <
> + MX8MP_IOMUXC_NAND_WE_B__USDHC3_CLK 0x196
> + MX8MP_IOMUXC_NAND_WP_B__USDHC3_CMD 0x1d6
> + MX8MP_IOMUXC_NAND_DATA04__USDHC3_DATA0 0x1d6
> + MX8MP_IOMUXC_NAND_DATA05__USDHC3_DATA1 0x1d6
> + MX8MP_IOMUXC_NAND_DATA06__USDHC3_DATA2 0x1d6
> + MX8MP_IOMUXC_NAND_DATA07__USDHC3_DATA3 0x1d6
> + MX8MP_IOMUXC_NAND_RE_B__USDHC3_DATA4 0x1d6
> + MX8MP_IOMUXC_NAND_CE2_B__USDHC3_DATA5 0x1d6
> + MX8MP_IOMUXC_NAND_CE3_B__USDHC3_DATA6 0x1d6
> + MX8MP_IOMUXC_NAND_CLE__USDHC3_DATA7 0x1d6
> + MX8MP_IOMUXC_NAND_CE1_B__USDHC3_STROBE 0x196
> + >;
> + };
> +};
> --
> 2.25.1
>