imx: Add SeeedStudio NPI-IMX6ULL Support

CPU:   Freescale i.MX6ULL rev1.1 792 MHz (running at 396 MHz)
CPU:   Industrial temperature grade (-40C to 105C) at 49C
Reset cause: POR
Model: Seeed NPi iMX6ULL Dev Board with NAND
Board: Seeed NPi i.MX6ULL Dev Board
DRAM:  512 MiB
NAND:  512 MiB
MMC:   FSL_SDHC: 0
In:    serial@2020000
Out:   serial@2020000
Err:   serial@2020000
Net:   FEC0

Working:
- Eth0
- MMC/SD
- NAND
- UART 1
- USB host

Signed-off-by: Navin Sankar Velliangiri <navin@linumiz.com>

Note:

Changes in v2:

 * removed unnecessary space in imx6ull-seeed-npi-imx6ull-dev-board.dts file.
 * Used SZ_2M for CONFIG_SYS_MALLOC_LEN size allocation.
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 31d687e..3c46f3f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -2008,6 +2008,7 @@
 source "board/isee/igep003x/Kconfig"
 source "board/kontron/sl28/Kconfig"
 source "board/myir/mys_6ulx/Kconfig"
+source "board/seeed/npi_imx6ull/Kconfig"
 source "board/spear/spear300/Kconfig"
 source "board/spear/spear310/Kconfig"
 source "board/spear/spear320/Kconfig"
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 8889d5b..6884c4e 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -810,6 +810,7 @@
 	imx6ull-14x14-evk.dtb \
 	imx6ull-colibri.dtb \
 	imx6ull-myir-mys-6ulx-eval.dtb \
+	imx6ull-seeed-npi-imx6ull-dev-board.dtb \
 	imx6ull-phytec-segin-ff-rdk-emmc.dtb \
 	imx6ull-dart-6ul.dtb \
 	imx6ull-somlabs-visionsom.dtb \
diff --git a/arch/arm/dts/imx6ull-seeed-npi-imx6ull-dev-board.dts b/arch/arm/dts/imx6ull-seeed-npi-imx6ull-dev-board.dts
new file mode 100644
index 0000000..ce03ddf
--- /dev/null
+++ b/arch/arm/dts/imx6ull-seeed-npi-imx6ull-dev-board.dts
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 Linumiz
+ * Author: Navin Sankar Velliangiri <navin@linumiz.com>
+ */
+
+/dts-v1/;
+#include "imx6ull.dtsi"
+#include "imx6ull-seeed-npi-imx6ull.dtsi"
+#include "imx6ull-seeed-npi-imx6ull-u-boot.dtsi"
+
+/ {
+	model = "Seeed NPi iMX6ULL Dev Board with NAND";
+	compatible = "seeed,imx6ull-seeed-npi-imx6ull", "fsl,imx6ull";
+};
+
+&gpmi {
+	status = "okay";
+};
diff --git a/arch/arm/dts/imx6ull-seeed-npi-imx6ull-u-boot.dtsi b/arch/arm/dts/imx6ull-seeed-npi-imx6ull-u-boot.dtsi
new file mode 100644
index 0000000..054e1aa
--- /dev/null
+++ b/arch/arm/dts/imx6ull-seeed-npi-imx6ull-u-boot.dtsi
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 Linumiz
+ * Author: Navin Sankar Velliangiri <navin@linumiz.com>
+ */
+
+&pinctrl_uart1 {
+	u-boot,dm-pre-reloc;
+};
+
+&gpmi {
+	u-boot,dm-spl;
+	u-boot,dm-pre-reloc;
+};
+
+&usdhc1 {
+	u-boot,dm-spl;
+	u-boot,dm-pre-reloc;
+};
+
+&usdhc2 {
+	u-boot,dm-spl;
+	u-boot,dm-pre-reloc;
+};
diff --git a/arch/arm/dts/imx6ull-seeed-npi-imx6ull.dtsi b/arch/arm/dts/imx6ull-seeed-npi-imx6ull.dtsi
new file mode 100644
index 0000000..b019474
--- /dev/null
+++ b/arch/arm/dts/imx6ull-seeed-npi-imx6ull.dtsi
@@ -0,0 +1,271 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2021 Linumiz
+ * Author: Navin Sankar Velliangiri <navin@linumiz.com>
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/pwm/pwm.h>
+
+/ {
+	model = "Seeed NPi-iMX6ULL Dev Board";
+	compatible = "fsl,imx6ull";
+
+	chosen {
+		stdout-path = &uart1;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+
+		user-led {
+			label = "User";
+			pinctrl-names = "default";
+			pinctrl-0 = <&pinctrl_gpios>;
+			gpios = <&gpio5 3 GPIO_ACTIVE_HIGH>;
+			linux,default-trigger = "heartbeat";
+		};
+	};
+};
+
+&gpmi {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_gpmi_nand>;
+	nand-on-flash-bbt;
+	status = "disabled";
+};
+
+&uart1 {
+	pinctrl-name = "default";
+	pinctrl-0 = <&pinctrl_uart1>;
+	status = "okay";
+};
+
+&usdhc1 {
+	pinctrl-names = "default", "state_100mhz", "state_200mhz";
+	pinctrl-0 = <&pinctrl_usdhc1>;
+	pinctrl-1 = <&pinctrl_usdhc1_100mhz>;
+	pinctrl-2 = <&pinctrl_usdhc1_200mhz>;
+	cd-gpios = <&gpio1 19 GPIO_ACTIVE_LOW>;
+	no-1-8-v;
+	keep-power-in-suspend;
+	wakeup-source;
+	status = "okay";
+};
+
+&usdhc2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_usdhc2>;
+	pinctrl-1 = <&pinctrl_usdhc2_100mhz>;
+	pinctrl-2 = <&pinctrl_usdhc2_200mhz>;
+	bus-width = <8>;
+	non-removable;
+	keep-power-in-suspend;
+};
+
+&fec1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_enet1>;
+	phy-mode = "rmii";
+	phy-handle = <&ethphy0>;
+	status = "okay";
+};
+
+&fec2 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_enet2>;
+	phy-mode = "rmii";
+	phy-handle = <&ethphy1>;
+	status = "okay";
+
+	mdio {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		ethphy0: ethernet-phy@2 {
+			compatible = "ethernet-phy-ieee802.3-c22";
+			reg = <2>;
+			micrel,led-mode = <1>;
+			clocks = <&clks IMX6UL_CLK_ENET_REF>;
+			clock-names = "rmii-ref";
+		};
+
+		ethphy1: ethernet-phy@1 {
+			compatible = "ethernet-phy-ieee802.3-c22";
+			reg = <1>;
+			micrel,led-mode = <1>;
+			clocks = <&clks IMX6UL_CLK_ENET2_REF>;
+			clock-names = "rmii-ref";
+		};
+	};
+};
+
+&usbotg1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_usb_otg1_id>;
+	dr_mode = "otg";
+	srp-disable;
+	hnp-disable;
+	adp-disable;
+	status = "okay";
+};
+
+&usbotg2 {
+	dr_mode = "host";
+	disable-over-current;
+	status = "okay";
+};
+
+&iomuxc {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_gpios>;
+
+	pinctrl_uart1: uart1grp {
+		fsl,pin = <
+			MX6UL_PAD_UART1_TX_DATA__UART1_DCE_TX	0x1b0b1
+			MX6UL_PAD_UART1_RX_DATA__UART1_DCE_RX	0x1b0b1
+		>;
+	};
+
+	pinctrl_usb_otg1_id: usbotg1idgrp {
+		fsl,pin = <
+			MX6UL_PAD_GPIO1_IO00__ANATOP_OTG1_ID	0x17059
+		>;
+	};
+
+	pinctrl_gpmi_nand: gpminandgrp {
+		fsl,pins = <
+			MX6UL_PAD_NAND_DQS__RAWNAND_DQS		0x0b0b1
+			MX6UL_PAD_NAND_CLE__RAWNAND_CLE		0x0b0b1
+			MX6UL_PAD_NAND_ALE__RAWNAND_ALE		0x0b0b1
+			MX6UL_PAD_NAND_WP_B__RAWNAND_WP_B	0x0b0b1
+			MX6UL_PAD_NAND_READY_B__RAWNAND_READY_B	0x0b000
+			MX6UL_PAD_NAND_CE0_B__RAWNAND_CE0_B	0x0b0b1
+			MX6UL_PAD_NAND_CE1_B__RAWNAND_CE1_B	0x0b0b1
+			MX6UL_PAD_NAND_RE_B__RAWNAND_RE_B	0x0b0b1
+			MX6UL_PAD_NAND_WE_B__RAWNAND_WE_B	0x0b0b1
+			MX6UL_PAD_NAND_DATA00__RAWNAND_DATA00	0x0b0b1
+			MX6UL_PAD_NAND_DATA01__RAWNAND_DATA01	0x0b0b1
+			MX6UL_PAD_NAND_DATA02__RAWNAND_DATA02	0x0b0b1
+			MX6UL_PAD_NAND_DATA03__RAWNAND_DATA03	0x0b0b1
+			MX6UL_PAD_NAND_DATA04__RAWNAND_DATA04	0x0b0b1
+			MX6UL_PAD_NAND_DATA05__RAWNAND_DATA05	0x0b0b1
+			MX6UL_PAD_NAND_DATA06__RAWNAND_DATA06   0x0b0b1
+			MX6UL_PAD_NAND_DATA07__RAWNAND_DATA07	0x0b0b1
+		>;
+	};
+
+	pinctrl_usdhc1: usdhc1grp {
+		fsl,pins = <
+			MX6UL_PAD_SD1_CMD__USDHC1_CMD		0x17059
+			MX6UL_PAD_SD1_CLK__USDHC1_CLK		0x10059
+			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__GPIO1_IO19	0x17059
+		>;
+	};
+
+	pinctrl_usdhc1_100mhz: usdhc1grp100mhz {
+		fsl,pins = <
+			MX6UL_PAD_SD1_CMD__USDHC1_CMD		0x170b9
+			MX6UL_PAD_SD1_CLK__USDHC1_CLK		0x100b9
+			MX6UL_PAD_SD1_DATA0__USDHC1_DATA0	0x170b9
+			MX6UL_PAD_SD1_DATA1__USDHC1_DATA1	0x170b9
+			MX6UL_PAD_SD1_DATA2__USDHC1_DATA2	0x170b9
+			MX6UL_PAD_SD1_DATA3__USDHC1_DATA3	0x170b9
+		>;
+	};
+
+	pinctrl_usdhc1_200mhz: usdhc1grp200mhz {
+		fsl,pins = <
+			MX6UL_PAD_SD1_CMD__USDHC1_CMD		0x170f9
+			MX6UL_PAD_SD1_CLK__USDHC1_CLK		0x100f9
+			MX6UL_PAD_SD1_DATA0__USDHC1_DATA0	0x170f9
+			MX6UL_PAD_SD1_DATA1__USDHC1_DATA1	0x170f9
+			MX6UL_PAD_SD1_DATA2__USDHC1_DATA2	0x170f9
+			MX6UL_PAD_SD1_DATA3__USDHC1_DATA3	0x170f9
+		>;
+	};
+
+	pinctrl_usdhc2: usdhc2grp {
+		fsl,pins = <
+			MX6UL_PAD_NAND_RE_B__USDHC2_CLK		0x10069
+			MX6UL_PAD_NAND_WE_B__USDHC2_CMD		0x17059
+			MX6UL_PAD_NAND_DATA00__USDHC2_DATA0	0x17059
+			MX6UL_PAD_NAND_DATA01__USDHC2_DATA1	0x17059
+			MX6UL_PAD_NAND_DATA02__USDHC2_DATA2	0x17059
+			MX6UL_PAD_NAND_DATA03__USDHC2_DATA3	0x17059
+			MX6UL_PAD_NAND_DATA04__USDHC2_DATA4	0x17059
+			MX6UL_PAD_NAND_DATA05__USDHC2_DATA5	0x17059
+			MX6UL_PAD_NAND_DATA06__USDHC2_DATA6	0x17059
+			MX6UL_PAD_NAND_DATA07__USDHC2_DATA7	0x17059
+		>;
+	};
+
+	pinctrl_usdhc2_100mhz: usdhc2grp100mhz {
+		fsl,pins = <
+			MX6UL_PAD_NAND_RE_B__USDHC2_CLK		0x100b9
+			MX6UL_PAD_NAND_WE_B__USDHC2_CMD		0x170b9
+			MX6UL_PAD_NAND_DATA00__USDHC2_DATA0	0x170b9
+			MX6UL_PAD_NAND_DATA01__USDHC2_DATA1	0x170b9
+			MX6UL_PAD_NAND_DATA02__USDHC2_DATA2	0x170b9
+			MX6UL_PAD_NAND_DATA03__USDHC2_DATA3	0x170b9
+			MX6UL_PAD_NAND_DATA04__USDHC2_DATA4	0x170b9
+			MX6UL_PAD_NAND_DATA05__USDHC2_DATA5	0x170b9
+			MX6UL_PAD_NAND_DATA06__USDHC2_DATA6	0x170b9
+			MX6UL_PAD_NAND_DATA07__USDHC2_DATA7	0x170b9
+		>;
+	};
+
+	pinctrl_usdhc2_200mhz: usdhc2grp200mhz {
+		fsl,pins = <
+			MX6UL_PAD_NAND_RE_B__USDHC2_CLK		0x100f9
+			MX6UL_PAD_NAND_WE_B__USDHC2_CMD		0x170f9
+			MX6UL_PAD_NAND_DATA00__USDHC2_DATA0	0x170f9
+			MX6UL_PAD_NAND_DATA01__USDHC2_DATA1	0x170f9
+			MX6UL_PAD_NAND_DATA02__USDHC2_DATA2	0x170f9
+			MX6UL_PAD_NAND_DATA03__USDHC2_DATA3	0x170f9
+			MX6UL_PAD_NAND_DATA04__USDHC2_DATA4	0x170f9
+			MX6UL_PAD_NAND_DATA05__USDHC2_DATA5	0x170f9
+			MX6UL_PAD_NAND_DATA06__USDHC2_DATA6	0x170f9
+			MX6UL_PAD_NAND_DATA07__USDHC2_DATA7	0x170f9
+		>;
+	};
+
+	pinctrl_enet1: enet1grp {
+		fsl,pins = <
+			MX6UL_PAD_ENET1_RX_EN__ENET1_RX_EN      0x1b0b0
+			MX6UL_PAD_ENET1_RX_ER__ENET1_RX_ER      0x1b0b0
+			MX6UL_PAD_ENET1_RX_DATA0__ENET1_RDATA00 0x1b0b0
+			MX6UL_PAD_ENET1_RX_DATA1__ENET1_RDATA01 0x1b0b0
+			MX6UL_PAD_ENET1_TX_EN__ENET1_TX_EN      0x1b0b0
+			MX6UL_PAD_ENET1_TX_DATA0__ENET1_TDATA00 0x1b0b0
+			MX6UL_PAD_ENET1_TX_DATA1__ENET1_TDATA01 0x1b0b0
+			MX6UL_PAD_ENET1_TX_CLK__ENET1_REF_CLK1  0x4001b031
+		>;
+	};
+
+	pinctrl_enet2: enet2grp {
+		fsl,pins = <
+			MX6UL_PAD_GPIO1_IO07__ENET2_MDC         0x1b0b0
+			MX6UL_PAD_GPIO1_IO06__ENET2_MDIO        0x1b0b0
+			MX6UL_PAD_ENET2_RX_EN__ENET2_RX_EN      0x1b0b0
+			MX6UL_PAD_ENET2_RX_ER__ENET2_RX_ER      0x1b0b0
+			MX6UL_PAD_ENET2_RX_DATA0__ENET2_RDATA00 0x1b0b0
+			MX6UL_PAD_ENET2_RX_DATA1__ENET2_RDATA01 0x1b0b0
+			MX6UL_PAD_ENET2_TX_EN__ENET2_TX_EN      0x1b0b0
+			MX6UL_PAD_ENET2_TX_DATA0__ENET2_TDATA00 0x1b0b0
+			MX6UL_PAD_ENET2_TX_DATA1__ENET2_TDATA01 0x1b0b0
+			MX6UL_PAD_ENET2_TX_CLK__ENET2_REF_CLK2  0x4001b031
+		>;
+	};
+
+	pinctrl_gpios: gpiosgrp {
+		fsl,pins = <
+			MX6UL_PAD_SNVS_TAMPER3__GPIO5_IO03	0x0b0b0
+		>;
+	};
+};
diff --git a/arch/arm/mach-imx/mx6/Kconfig b/arch/arm/mach-imx/mx6/Kconfig
index 0f274c4..23cab39 100644
--- a/arch/arm/mach-imx/mx6/Kconfig
+++ b/arch/arm/mach-imx/mx6/Kconfig
@@ -453,6 +453,17 @@
 	imply USB_ETHER_SMSC95XX
 	imply USB_HOST_ETHER
 
+config TARGET_NPI_IMX6ULL
+	bool "Seeed NPI-IMX6ULL"
+	depends on MX6ULL
+	select DM
+	select DM_ETH
+	select DM_MMC
+	select DM_GPIO
+	select DM_SERIAL
+	select DM_THERMAL
+	select SUPPORT_SPL
+
 config TARGET_OPOS6ULDEV
 	bool "Armadeus OPOS6ULDev board"
 	depends on MX6UL