imx: imxrt1050-evk: Add support for the NXP i.MXRT1050-EVK

This commit adds board support for i.MXRT1050-EVK from NXP. This board
is an evaluation kit provided by NXP for i.MXRT105x processor family.

More information about this board can be found here:
https://www.nxp.com/design/development-boards/i.mx-evaluation-and-development-boards/i.mx-rt1050-evaluation-kit:MIMXRT1050-EVK

The initial supported/tested devices include:
- Debug serial
- SD

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>

3 files changed, 246 insertions, 0 deletions

diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index ca759a1..d7e625e 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -709,6 +709,8 @@ dtb-$(CONFIG_ARCH_IMX8M) += \
 	imx8mq-evk.dtb \
 	imx8mp-evk.dtb
 
+dtb-$(CONFIG_ARCH_IMXRT) += imxrt1050-evk.dtb
+
 dtb-$(CONFIG_RCAR_GEN2) += \
 	r8a7790-lager-u-boot.dtb \
 	r8a7790-stout-u-boot.dtb \
diff --git a/arch/arm/dts/imxrt1050-evk-u-boot.dtsi b/arch/arm/dts/imxrt1050-evk-u-boot.dtsi
new file mode 100644
index 0000000..fb4f7f6
--- /dev/null
+++ b/arch/arm/dts/imxrt1050-evk-u-boot.dtsi
@@ -0,0 +1,44 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+/ {
+	chosen {
+		u-boot,dm-spl;
+	};
+};
+
+&lpuart1 { /* console */
+	u-boot,dm-spl;
+};
+
+&semc {
+	bank1: bank@0 {
+		u-boot,dm-spl;
+	};
+};
+
+&iomuxc {
+	u-boot,dm-spl;
+
+	imxrt1050-evk {
+		u-boot,dm-spl;
+		pinctrl_lpuart1: lpuart1grp {
+			u-boot,dm-spl;
+		};
+
+		pinctrl_semc: semcgrp {
+			u-boot,dm-spl;
+		};
+
+		pinctrl_usdhc0: usdhc0grp {
+			u-boot,dm-spl;
+		};
+	};
+};
+
+&usdhc1 {
+	u-boot,dm-spl;
+};
diff --git a/arch/arm/dts/imxrt1050-evk.dts b/arch/arm/dts/imxrt1050-evk.dts
new file mode 100644
index 0000000..56b7598
--- /dev/null
+++ b/arch/arm/dts/imxrt1050-evk.dts
@@ -0,0 +1,200 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
+/*
+ * Copyright (C) 2019
+ * Author(s): Giulio Benetti <giulio.benetti@benettiengineering.com>
+ */
+
+/dts-v1/;
+#include "imxrt1050.dtsi"
+#include "imxrt1050-evk-u-boot.dtsi"
+#include <dt-bindings/pinctrl/pins-imxrt1050.h>
+
+/ {
+	model = "NXP IMXRT1050-evk board";
+	compatible = "fsl,imxrt1050-evk", "fsl,imxrt1050";
+
+	chosen {
+		bootargs = "root=/dev/ram";
+		stdout-path = "serial0:115200n8";
+	};
+
+	memory {
+		reg = <0x80000000 0x2000000>;
+	};
+};
+
+&lpuart1 { /* console */
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_lpuart1>;
+	status = "okay";
+};
+
+&semc {
+	/*
+	 * Memory configuration from sdram datasheet IS42S16160J-6BLI
+	 */
+	fsl,sdram-mux = /bits/ 8 <MUX_A8_SDRAM_A8
+				MUX_CSX0_SDRAM_CS1
+				0
+				0
+				0
+				0>;
+	fsl,sdram-control = /bits/ 8 <MEM_WIDTH_16BITS
+					BL_8
+					COL_9BITS
+					CL_3>;
+	fsl,sdram-timing = /bits/ 8 <0x2
+				     0x2
+				     0x9
+				     0x1
+				     0x5
+				     0x6
+
+				     0x20
+				     0x09
+				     0x01
+				     0x00
+
+				     0x04
+				     0x0A
+				     0x21
+				     0x50>;
+
+	bank1: bank@0 {
+		fsl,base-address = <0x80000000>;
+		fsl,memory-size = <MEM_SIZE_32M>;
+	};
+};
+
+&iomuxc {
+	pinctrl-names = "default";
+	pinctrl-0 = <&pinctrl_lpuart1>;
+
+	imxrt1050-evk {
+		pinctrl_lpuart1: lpuart1grp {
+			fsl,pins = <
+				MXRT1050_IOMUXC_GPIO_AD_B0_12_LPUART1_TXD
+					0xf1
+				MXRT1050_IOMUXC_GPIO_AD_B0_13_LPUART1_RXD
+					0xf1
+			>;
+		};
+
+		pinctrl_semc: semcgrp {
+			fsl,pins = <
+				MXRT1050_IOMUXC_GPIO_EMC_00_SEMC_DA00
+					0xf1	/* SEMC_D0 */
+				MXRT1050_IOMUXC_GPIO_EMC_01_SEMC_DA01
+					0xf1	/* SEMC_D1 */
+				MXRT1050_IOMUXC_GPIO_EMC_02_SEMC_DA02
+					0xf1	/* SEMC_D2 */
+				MXRT1050_IOMUXC_GPIO_EMC_03_SEMC_DA03
+					0xf1	/* SEMC_D3 */
+				MXRT1050_IOMUXC_GPIO_EMC_04_SEMC_DA04
+					0xf1	/* SEMC_D4 */
+				MXRT1050_IOMUXC_GPIO_EMC_05_SEMC_DA05
+					0xf1	/* SEMC_D5 */
+				MXRT1050_IOMUXC_GPIO_EMC_06_SEMC_DA06
+					0xf1	/* SEMC_D6 */
+				MXRT1050_IOMUXC_GPIO_EMC_07_SEMC_DA07
+					0xf1	/* SEMC_D7 */
+				MXRT1050_IOMUXC_GPIO_EMC_08_SEMC_DM00
+					0xf1	/* SEMC_DM0 */
+				MXRT1050_IOMUXC_GPIO_EMC_09_SEMC_ADDR00
+					0xf1	/* SEMC_A0 */
+				MXRT1050_IOMUXC_GPIO_EMC_10_SEMC_ADDR01
+					0xf1	/* SEMC_A1 */
+				MXRT1050_IOMUXC_GPIO_EMC_11_SEMC_ADDR02
+					0xf1	/* SEMC_A2 */
+				MXRT1050_IOMUXC_GPIO_EMC_12_SEMC_ADDR03
+					0xf1	/* SEMC_A3 */
+				MXRT1050_IOMUXC_GPIO_EMC_13_SEMC_ADDR04
+					0xf1	/* SEMC_A4 */
+				MXRT1050_IOMUXC_GPIO_EMC_14_SEMC_ADDR05
+					0xf1	/* SEMC_A5 */
+				MXRT1050_IOMUXC_GPIO_EMC_15_SEMC_ADDR06
+					0xf1	/* SEMC_A6 */
+				MXRT1050_IOMUXC_GPIO_EMC_16_SEMC_ADDR07
+					0xf1	/* SEMC_A7 */
+				MXRT1050_IOMUXC_GPIO_EMC_17_SEMC_ADDR08
+					0xf1	/* SEMC_A8 */
+				MXRT1050_IOMUXC_GPIO_EMC_18_SEMC_ADDR09
+					0xf1	/* SEMC_A9 */
+				MXRT1050_IOMUXC_GPIO_EMC_19_SEMC_ADDR11
+					0xf1	/* SEMC_A11 */
+				MXRT1050_IOMUXC_GPIO_EMC_20_SEMC_ADDR12
+					0xf1	/* SEMC_A12 */
+				MXRT1050_IOMUXC_GPIO_EMC_21_SEMC_BA0
+					0xf1	/* SEMC_BA0 */
+				MXRT1050_IOMUXC_GPIO_EMC_22_SEMC_BA1
+					0xf1	/* SEMC_BA1 */
+				MXRT1050_IOMUXC_GPIO_EMC_23_SEMC_ADDR10
+					0xf1	/* SEMC_A10 */
+				MXRT1050_IOMUXC_GPIO_EMC_24_SEMC_CAS
+					0xf1	/* SEMC_CAS */
+				MXRT1050_IOMUXC_GPIO_EMC_25_SEMC_RAS
+					0xf1	/* SEMC_RAS */
+				MXRT1050_IOMUXC_GPIO_EMC_26_SEMC_CLK
+					0xf1	/* SEMC_CLK */
+				MXRT1050_IOMUXC_GPIO_EMC_27_SEMC_CKE
+					0xf1	/* SEMC_CKE */
+				MXRT1050_IOMUXC_GPIO_EMC_28_SEMC_WE
+					0xf1	/* SEMC_WE */
+				MXRT1050_IOMUXC_GPIO_EMC_29_SEMC_CS0
+					0xf1	/* SEMC_CS0 */
+				MXRT1050_IOMUXC_GPIO_EMC_30_SEMC_DA08
+					0xf1	/* SEMC_D8 */
+				MXRT1050_IOMUXC_GPIO_EMC_31_SEMC_DA09
+					0xf1	/* SEMC_D9 */
+				MXRT1050_IOMUXC_GPIO_EMC_32_SEMC_DA10
+					0xf1	/* SEMC_D10 */
+				MXRT1050_IOMUXC_GPIO_EMC_33_SEMC_DA11
+					0xf1	/* SEMC_D11 */
+				MXRT1050_IOMUXC_GPIO_EMC_34_SEMC_DA12
+					0xf1	/* SEMC_D12 */
+				MXRT1050_IOMUXC_GPIO_EMC_35_SEMC_DA13
+					0xf1	/* SEMC_D13 */
+				MXRT1050_IOMUXC_GPIO_EMC_36_SEMC_DA14
+					0xf1	/* SEMC_D14 */
+				MXRT1050_IOMUXC_GPIO_EMC_37_SEMC_DA15
+					0xf1	/* SEMC_D15 */
+				MXRT1050_IOMUXC_GPIO_EMC_38_SEMC_DM01
+					0xf1	/* SEMC_DM1 */
+				MXRT1050_IOMUXC_GPIO_EMC_39_SEMC_DQS
+					(IMX_PAD_SION | 0xf1)	/* SEMC_DQS */
+			>;
+		};
+
+		pinctrl_usdhc0: usdhc0grp {
+			fsl,pins = <
+				MXRT1050_IOMUXC_GPIO_B1_12_USDHC1_CD_B
+					0x1B000
+				MXRT1050_IOMUXC_GPIO_B1_14_USDHC1_VSELECT
+					0xB069
+				MXRT1050_IOMUXC_GPIO_SD_B0_00_USDHC1_CMD
+					0x17061
+				MXRT1050_IOMUXC_GPIO_SD_B0_01_USDHC1_CLK
+					0x17061
+				MXRT1050_IOMUXC_GPIO_SD_B0_05_USDHC1_DATA3
+					0x17061
+				MXRT1050_IOMUXC_GPIO_SD_B0_04_USDHC1_DATA2
+					0x17061
+				MXRT1050_IOMUXC_GPIO_SD_B0_03_USDHC1_DATA1
+					0x17061
+				MXRT1050_IOMUXC_GPIO_SD_B0_02_USDHC1_DATA0
+					0x17061
+			>;
+		};
+	};
+};
+
+&usdhc1 {
+	pinctrl-names = "default", "state_100mhz", "state_200mhz", "sleep";
+	pinctrl-0 = <&pinctrl_usdhc0>;
+	pinctrl-1 = <&pinctrl_usdhc0>;
+	pinctrl-2 = <&pinctrl_usdhc0>;
+	pinctrl-3 = <&pinctrl_usdhc0>;
+	status = "okay";
+
+	cd-gpios = <&gpio2 28 GPIO_ACTIVE_LOW>;
+};