Add EV-iMX280-NANO-X-MB board

A simple prototyping board with one microSD port, one Ethernet port,
2 USB ports, I2C, SPI, GPIO, and UART interfaces.

Signed-off-by: Oleh Kravchenko <oleg@kaa.org.ua>
Cc: Stefano Babic <sbabic@denx.de>

6 files changed, 224 insertions, 10 deletions

diff --git a/MAINTAINERS b/MAINTAINERS
index 875eb5dfa4..2accd1fb83 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -923,9 +923,11 @@ OUT4-IMX6ULL-NANO BOARD
 M:	Oleh Kravchenko <oleg@kaa.org.ua>
 S:	Maintained
 T:	git https://github.com/Oleh-Kravchenko/u-boot-out4.git
+F:	arch/arm/dts/ev-imx280-nano-x-mb.dts
 F:	arch/arm/dts/o4-imx-nano.dts
 F:	arch/arm/dts/o4-imx6ull-nano.dtsi
 F:	board/out4
+F:	configs/ev-imx280-nano-x-mb_defconfig
 F:	configs/o4-imx6ull-nano_defconfig
 F:	include/configs/o4-imx6ull-nano.h
 
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index b944778c1a..d29844e765 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -822,6 +822,9 @@ dtb-$(CONFIG_ARCH_MX6) += \
 dtb-$(CONFIG_O4_IMX_NANO) += \
 	o4-imx-nano.dtb
 
+dtb-$(CONFIG_EV_IMX280_NANO_X_MB) += \
+	ev-imx280-nano-x-mb.dtb
+
 dtb-$(CONFIG_MX7) += imx7d-sdb.dtb \
 	imx7d-sdb-qspi.dtb \
 	imx7-cm.dtb \
diff --git a/arch/arm/dts/ev-imx280-nano-x-mb.dts b/arch/arm/dts/ev-imx280-nano-x-mb.dts
new file mode 100644
index 0000000000..7aec076af3
--- /dev/null
+++ b/arch/arm/dts/ev-imx280-nano-x-mb.dts
@@ -0,0 +1,109 @@
+// SPDX-License-Identifier: GPL-2.0+
+// Copyright (C) 2021 Oleh Kravchenko <oleg@kaa.org.ua>
+
+/dts-v1/;
+
+#include "o4-imx6ull-nano.dtsi"
+
+/ {
+	model = "EV-iMX280-NANO-X-MB";
+	compatible = "evodbg,ev-imx280-nano-x-mb",
+		     "out4,o4-imx6ull-nano",
+		     "fsl,imx6ull";
+
+	aliases {
+		mmc1 = &usdhc1;
+	};
+
+	chosen {
+		stdout-path = &uart1;
+	};
+};
+
+&iomuxc {
+	pinctrl_uart1: uart1grp {
+		fsl,pins = <
+			MX6UL_PAD_UART1_RX_DATA__UART1_DCE_RX	0x1b0b1
+			MX6UL_PAD_UART1_TX_DATA__UART1_DCE_TX	0x1b0b1
+		>;
+	};
+
+	pinctrl_usdhc1: usdhc1grp {
+		fsl,pins = <
+			MX6UL_PAD_SD1_CLK__USDHC1_CLK		0x10069
+			MX6UL_PAD_SD1_CMD__USDHC1_CMD		0x17059
+			MX6UL_PAD_SD1_DATA0__USDHC1_DATA0	0x17059
+			MX6UL_PAD_SD1_DATA1__USDHC1_DATA1	0x17059
+			MX6UL_PAD_SD1_DATA2__USDHC1_DATA2	0x17059
+			MX6UL_PAD_SD1_DATA3__USDHC1_DATA3	0x17059
+			MX6UL_PAD_UART1_RTS_B__USDHC1_CD_B	0x03029
+		>;
+	};
+
+	pinctrl_mdio: mdiogrp {
+		fsl,pins = <
+			MX6UL_PAD_GPIO1_IO06__ENET1_MDIO	0x1b0b0
+			MX6UL_PAD_GPIO1_IO07__ENET1_MDC		0x1b0b0
+			MX6UL_PAD_SNVS_TAMPER1__GPIO5_IO01	0xb0b0 /* RST */
+		>;
+	};
+
+	pinctrl_usb_otg1_id: usbotg1idgrp {
+		fsl,pins = <
+			MX6UL_PAD_GPIO1_IO00__ANATOP_OTG1_ID	0x17059
+		>;
+	};
+};
+
+&uart1 {
+	pinctrl-0 = <&pinctrl_uart1>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&usdhc1 {
+	bus-width = <4>;
+	no-1-8-v;
+	pinctrl-0 = <&pinctrl_usdhc1>;
+	pinctrl-names = "default";
+	status = "okay";
+	wakeup-source;
+};
+
+&fec1 {
+	phy-handle = <&phy0>;
+	phy-mode = "rmii";
+	phy-reset-duration = <250>;
+	phy-reset-post-delay = <100>;
+	phy-reset-gpios = <&gpio5 1 GPIO_ACTIVE_LOW>;
+	pinctrl-0 = <&pinctrl_fec1 &pinctrl_mdio>;
+	pinctrl-names = "default";
+	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		phy0: ethernet-phy@0 {
+			clocks = <&clks IMX6UL_CLK_ENET_REF>;
+			clock-names = "rmii-ref";
+			interrupt-parent = <&gpio5>;
+			interrupts = <7 IRQ_TYPE_EDGE_FALLING>;
+			pinctrl-0 = <&pinctrl_phy0_irq>;
+			pinctrl-names = "default";
+			reg = <0>;
+		};
+	};
+};
+
+&usbotg1 {
+	dr_mode = "otg";
+	pinctrl-0 = <&pinctrl_usb_otg1_id>;
+	pinctrl-names = "default";
+	status = "okay";
+};
+
+&usbotg2 {
+	dr_mode = "host";
+	status = "okay";
+};
diff --git a/board/out4/o4-imx6ull-nano/Kconfig b/board/out4/o4-imx6ull-nano/Kconfig
index c2497d521f..e2ab80b6d4 100644
--- a/board/out4/o4-imx6ull-nano/Kconfig
+++ b/board/out4/o4-imx6ull-nano/Kconfig
@@ -45,6 +45,12 @@ config O4_IMX_NANO
 	    A baseboard for EV-iMX280-NANO module:
 	    https://out4.ru/products/board/18-o4-imx-nano.html
 
+config EV_IMX280_NANO_X_MB
+	bool "EV-IMX280-NANO-X-MB"
+	help
+	    A simple baseboard for EV-iMX280-NANO module:
+	    http://evodbg.net/products/mx28-eval-kits/14-ev-imx280-nano-x-mb.html
+
 endchoice
 
 config IMX_CONFIG
@@ -53,5 +59,6 @@ config IMX_CONFIG
 
 config DEFAULT_DEVICE_TREE
 	default "o4-imx-nano" if O4_IMX_NANO
+	default "ev-imx280-nano-x-mb" if EV_IMX280_NANO_X_MB
 
 endif
diff --git a/board/out4/o4-imx6ull-nano/o4-imx6ull-nano.c b/board/out4/o4-imx6ull-nano/o4-imx6ull-nano.c
index fec1755c32..edb200e9e5 100644
--- a/board/out4/o4-imx6ull-nano/o4-imx6ull-nano.c
+++ b/board/out4/o4-imx6ull-nano/o4-imx6ull-nano.c
@@ -39,16 +39,18 @@ static int setup_fec_clock(void)
 		if (ret)
 			return ret;
 
-		/*
-		 * Use 50M anatop loopback REF_CLK2 for ENET2,
-		 * clear gpr1[14], set gpr1[18].
-		 */
-		clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUX_GPR1_FEC2_MASK,
-				IOMUX_GPR1_FEC2_CLOCK_MUX1_SEL_MASK);
-
-		ret = enable_fec_anatop_clock(1, ENET_50MHZ);
-		if (ret)
-			return ret;
+		if (!IS_ENABLED(CONFIG_EV_IMX280_NANO_X_MB)) {
+			/*
+			 * Use 50M anatop loopback REF_CLK2 for ENET2,
+			 * clear gpr1[14], set gpr1[18].
+			 */
+			clrsetbits_le32(&iomuxc_regs->gpr[1], IOMUX_GPR1_FEC2_MASK,
+					IOMUX_GPR1_FEC2_CLOCK_MUX1_SEL_MASK);
+
+			ret = enable_fec_anatop_clock(1, ENET_50MHZ);
+			if (ret)
+				return ret;
+		}
 
 		enable_enet_clk(1);
 	}
diff --git a/configs/ev-imx280-nano-x-mb_defconfig b/configs/ev-imx280-nano-x-mb_defconfig
new file mode 100644
index 0000000000..b06aedef2a
--- /dev/null
+++ b/configs/ev-imx280-nano-x-mb_defconfig
@@ -0,0 +1,91 @@
+CONFIG_ARCH_MX6=y
+CONFIG_ARM=y
+CONFIG_DEFAULT_DEVICE_TREE="ev-imx280-nano-x-mb"
+CONFIG_EV_IMX280_NANO_X_MB=y
+CONFIG_HUSH_PARSER=y
+CONFIG_IMX_MODULE_FUSE=y
+CONFIG_MX6ULL=y
+CONFIG_PINCTRL=y
+CONFIG_PINCTRL_IMX6=y
+CONFIG_SYS_TEXT_BASE=0x87800000
+CONFIG_TARGET_O4_IMX6ULL_NANO=y
+
+CONFIG_K4B4G1646D_BCMA=y
+# CONFIG_MT41K256M16HA_125E is not set
+
+# Device Tree
+CONFIG_OF_CONTROL=y
+CONFIG_OF_LIBFDT_OVERLAY=y
+
+# Environment
+CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
+CONFIG_ENV_IS_IN_FAT=y
+CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG=y
+
+# Clock driver for imx6ull is not implemented
+# CONFIG_CLK_IMX6Q=y
+
+# Thermal
+CONFIG_DM_THERMAL=y
+CONFIG_IMX_THERMAL=y
+
+# Serial
+CONFIG_DM_SERIAL=y
+CONFIG_MXC_UART=y
+
+# eMMC support
+CONFIG_CMD_MMC=y
+CONFIG_DM_MMC=y
+CONFIG_FSL_USDHC=y
+CONFIG_SUPPORT_EMMC_BOOT=y
+CONFIG_SUPPORT_EMMC_RPMB=y
+
+# GPIO support
+CONFIG_CMD_GPIO=y
+CONFIG_DM_GPIO=y
+CONFIG_MXC_GPIO=y
+
+# USB support
+CONFIG_CI_UDC=y
+CONFIG_CMD_USB=y
+CONFIG_CMD_USB_MASS_STORAGE=y
+CONFIG_DM_USB=y
+CONFIG_USB=y
+CONFIG_USB_GADGET=y
+CONFIG_USB_GADGET_DOWNLOAD=y
+
+# Fastboot support
+CONFIG_CMD_FASTBOOT=y
+CONFIG_FASTBOOT_BUF_ADDR=0x82000000
+CONFIG_FASTBOOT_CMD_OEM_FORMAT=y
+CONFIG_FASTBOOT_FLASH=y
+CONFIG_FASTBOOT_FLASH_MMC_DEV=0
+CONFIG_USB_FUNCTION_FASTBOOT=y
+
+# Ethernet support
+CONFIG_CMD_DHCP=y
+CONFIG_CMD_MDIO=y
+CONFIG_CMD_MII=y
+CONFIG_CMD_PING=y
+CONFIG_DM_ETH=y
+CONFIG_FEC_MXC=y
+CONFIG_MII=y
+CONFIG_NET_RANDOM_ETHADDR=y
+CONFIG_PHYLIB=y
+CONFIG_PHY_SMSC=y
+
+# Watchdog support is broken
+# CONFIG_CMD_WDT=y
+# CONFIG_IMX_WATCHDOG=y
+# CONFIG_SYSRESET_WATCHDOG=y
+# CONFIG_WATCHDOG_RESET_DISABLE=y
+# CONFIG_WDT=y
+
+# misc
+CONFIG_CMD_BOOTZ=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_GPT=y
+CONFIG_CMD_MEMINFO=y
+CONFIG_CMD_MEMTEST=y
+CONFIG_CMD_PART=y