Thread (4 messages) 4 messages, 3 authors, 2025-10-25

Re: [PATCH v3 2/2] arm64: dts: add support for NXP i.MX8MP FRDM board

From: Shawn Guo <hidden>
Date: 2025-10-25 07:19:01
Also in: imx, linux-devicetree, lkml 

On Mon, Sep 22, 2025 at 07:25:23PM -0400, Rogerio Pimentel wrote:
quoted hunk ↗ jump to hunk
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.

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: Xiaofeng Wei <redacted>
Signed-off-by: Rogerio Pimentel <redacted>
Reviewed-by: Peng Fan <peng.fan@nxp.com>

---

Changes in v3:

 - Removing the following tags and names added
 on v2 by mistake: 
 Reviewed-by: Daniel Baluta [off-list ref]
 Signed-off-by: Anson Huang [off-list ref]
 Signed-off-by: Shawn Guo [off-list ref]

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 525ef180481d..d861e576779a 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..9138c65739aa
--- /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
+ */
+
+/dts-v1/;
+
+#include "imx8mp.dtsi"
+
+/ {
+	model = "NXP i.MX8MPlus FRDM board";
+	compatible = "fsl,imx8mp-frdm", "fsl,imx8mp";
+
+	chosen {
+		stdout-path = &uart2;
+	};
+
+	gpio-leds {
+		compatible = "gpio-leds";
+
+		led-0 {
+			label = "red";
+			gpios = <&pcal6416 13 GPIO_ACTIVE_HIGH>;
+			default-state = "off";
+		};
+
+		led-1 {
+			label = "green";
+			gpios = <&pcal6416 14 GPIO_ACTIVE_HIGH>;
+			default-state = "on";
+		};
+
+		led-2 {
+			label = "blue";
+			gpios = <&pcal6416 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 {
Please sort I2C devices in order of slave address?

+		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: gpio@20 {
+		compatible = "nxp,pcal6416";
+		reg = <0x20>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		interrupt-controller;
+		#interrupt-cells = <2>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&pinctrl_pcal6416_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 {
Would it be better to label these two pcal6416 devices as

	pcal6416_1
	pcal6416_2

or
	pcal6416_0
	pcal6416_1
?

Shawn

+		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_int: pcal6416_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
  



    
  

  
    

      

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