imx: mx6ul_14x14_evk add basic board support

1. Add USDHC, I2C, UART, 74LV, USB, QSPI support.
2. Support SPL
3. CONFIG_MX6UL_14X14_EVK_EMMC_REWORK is introduced, this board default
   supports sd for usdhc2, but can do hardware rework to make usdhc2 support
   emmc.

Boot Log:
U-Boot SPL 2015.07-rc3-00124-g35d727b (Jul 20 2015 - 18:40:59)
reading u-boot.img
reading u-boot.img

U-Boot 2015.07-rc3-00124-g35d727b (Jul 20 2015 - 18:40:59 +0800)

CPU:   Freescale i.MX6UL rev1.0 792 MHz (running at 396 MHz)
CPU:   Commercial temperature grade (0C to 95C)CPU:   Thermal invalid data, fuse: 0x0
 - invalid sensor device
 Reset cause: POR
 Board: MX6UL 14x14 EVK
 I2C:   ready
 DRAM:  512 MiB
 MMC:   FSL_SDHC: 0, FSL_SDHC: 1
 *** Warning - bad CRC, using default environment

 In:    serial
 Out:   serial
 Err:   serial
 Net:   CPU Net Initialization Failed
 No ethernet found.
 Hit any key to stop autoboot:  0
Signed-off-by: NPeng Fan <Peng.Fan@freescale.com>

arch/arm/Kconfig

@@ -578,6 +578,13 @@ config TARGET_MX6SXSABRESD
 	select DM
 	select DM_THERMAL
 
+config TARGET_MX6UL_14X14_EVK
+	bool "Support mx6ul_14x14_evk"
+	select CPU_V7
+	select DM
+	select DM_THERMAL
+	select SUPPORT_SPL
+
 config TARGET_GW_VENTANA
 	bool "Support gw_ventana"
 	select CPU_V7
@@ -915,6 +922,7 @@ source "board/freescale/mx6qsabreauto/Kconfig"
 source "board/freescale/mx6sabresd/Kconfig"
 source "board/freescale/mx6slevk/Kconfig"
 source "board/freescale/mx6sxsabresd/Kconfig"
+source "board/freescale/mx6ul_14x14_evk/Kconfig"
 source "board/freescale/vf610twr/Kconfig"
 source "board/gateworks/gw_ventana/Kconfig"
 source "board/genesi/mx51_efikamx/Kconfig"

board/freescale/mx6ul_14x14_evk/Kconfig

+if TARGET_MX6UL_14X14_EVK
+
+config SYS_BOARD
+	default "mx6ul_14x14_evk"
+
+config SYS_VENDOR
+	default "freescale"
+
+config SYS_SOC
+	default "mx6"
+
+config SYS_CONFIG_NAME
+	default "mx6ul_14x14_evk"
+
+endif

board/freescale/mx6ul_14x14_evk/MAINTAINERS

+MX6ULEVK BOARD
+M:	Peng Fan <Peng.Fan@freescale.com>
+S:	Maintained
+F:	board/freescale/mx6ul_14x14_evk/
+F:	include/configs/mx6ul_14x14_evk.h
+F:	configs/mx6ul_14x14_evk_defconfig

board/freescale/mx6ul_14x14_evk/Makefile

+# (C) Copyright 2015 Freescale Semiconductor, Inc.
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y  := mx6ul_14x14_evk.o

board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c

+/*
+ * Copyright (C) 2015 Freescale Semiconductor, Inc.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/arch/clock.h>
+#include <asm/arch/iomux.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/crm_regs.h>
+#include <asm/arch/mx6ul_pins.h>
+#include <asm/arch/mx6-pins.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/gpio.h>
+#include <asm/imx-common/iomux-v3.h>
+#include <asm/imx-common/boot_mode.h>
+#include <asm/imx-common/mxc_i2c.h>
+#include <asm/io.h>
+#include <common.h>
+#include <fsl_esdhc.h>
+#include <i2c.h>
+#include <linux/sizes.h>
+#include <mmc.h>
+#include <usb.h>
+#include <usb/ehci-fsl.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#define UART_PAD_CTRL  (PAD_CTL_PKE | PAD_CTL_PUE |		\
+	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |		\
+	PAD_CTL_DSE_40ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
+
+#define USDHC_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |		\
+	PAD_CTL_PUS_22K_UP  | PAD_CTL_SPEED_LOW |		\
+	PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
+
+#define USDHC_DAT3_CD_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |	\
+	PAD_CTL_PUS_100K_DOWN  | PAD_CTL_SPEED_LOW |		\
+	PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
+
+#define I2C_PAD_CTRL    (PAD_CTL_PKE | PAD_CTL_PUE |            \
+	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |               \
+	PAD_CTL_DSE_40ohm | PAD_CTL_HYS |			\
+	PAD_CTL_ODE)
+
+#define IOX_SDI IMX_GPIO_NR(5, 10)
+#define IOX_STCP IMX_GPIO_NR(5, 7)
+#define IOX_SHCP IMX_GPIO_NR(5, 11)
+#define IOX_OE IMX_GPIO_NR(5, 18)
+
+static iomux_v3_cfg_t const iox_pads[] = {
+	/* IOX_SDI */
+	MX6_PAD_BOOT_MODE0__GPIO5_IO10 | MUX_PAD_CTRL(NO_PAD_CTRL),
+	/* IOX_SHCP */
+	MX6_PAD_BOOT_MODE1__GPIO5_IO11 | MUX_PAD_CTRL(NO_PAD_CTRL),
+	/* IOX_STCP */
+	MX6_PAD_SNVS_TAMPER7__GPIO5_IO07 | MUX_PAD_CTRL(NO_PAD_CTRL),
+	/* IOX_nOE */
+	MX6_PAD_SNVS_TAMPER8__GPIO5_IO08 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+/*
+ * HDMI_nRST --> Q0
+ * ENET1_nRST --> Q1
+ * ENET2_nRST --> Q2
+ * CAN1_2_STBY --> Q3
+ * BT_nPWD --> Q4
+ * CSI_RST --> Q5
+ * CSI_PWDN --> Q6
+ * LCD_nPWREN --> Q7
+ */
+enum qn {
+	HDMI_NRST,
+	ENET1_NRST,
+	ENET2_NRST,
+	CAN1_2_STBY,
+	BT_NPWD,
+	CSI_RST,
+	CSI_PWDN,
+	LCD_NPWREN,
+};
+
+enum qn_func {
+	qn_reset,
+	qn_enable,
+	qn_disable,
+};
+
+enum qn_level {
+	qn_low = 0,
+	qn_high = 1,
+};
+
+static enum qn_level seq[3][2] = {
+	{0, 1}, {1, 1}, {0, 0}
+};
+
+static enum qn_func qn_output[8] = {
+	qn_reset, qn_reset, qn_reset, qn_enable, qn_disable, qn_reset,
+	qn_disable, qn_enable
+};
+
+static void iox74lv_init(void)
+{
+	int i;
+
+	gpio_direction_output(IOX_OE, 0);
+
+	for (i = 7; i >= 0; i--) {
+		gpio_direction_output(IOX_SHCP, 0);
+		gpio_direction_output(IOX_SDI, seq[qn_output[i]][0]);
+		udelay(500);
+		gpio_direction_output(IOX_SHCP, 1);
+		udelay(500);
+	}
+
+	gpio_direction_output(IOX_STCP, 0);
+	udelay(500);
+	/*
+	 * shift register will be output to pins
+	 */
+	gpio_direction_output(IOX_STCP, 1);
+
+	for (i = 7; i >= 0; i--) {
+		gpio_direction_output(IOX_SHCP, 0);
+		gpio_direction_output(IOX_SDI, seq[qn_output[i]][1]);
+		udelay(500);
+		gpio_direction_output(IOX_SHCP, 1);
+		udelay(500);
+	}
+	gpio_direction_output(IOX_STCP, 0);
+	udelay(500);
+	/*
+	 * shift register will be output to pins
+	 */
+	gpio_direction_output(IOX_STCP, 1);
+
+	gpio_direction_output(IOX_OE, 1);
+};
+
+void iox74lv_set(int index)
+{
+	int i;
+
+	gpio_direction_output(IOX_OE, 0);
+
+	for (i = 7; i >= 0; i--) {
+		gpio_direction_output(IOX_SHCP, 0);
+
+		if (i == index)
+			gpio_direction_output(IOX_SDI, seq[qn_output[i]][0]);
+		else
+			gpio_direction_output(IOX_SDI, seq[qn_output[i]][1]);
+		udelay(500);
+		gpio_direction_output(IOX_SHCP, 1);
+		udelay(500);
+	}
+
+	gpio_direction_output(IOX_STCP, 0);
+	udelay(500);
+	/*
+	 * shift register will be output to pins
+	 */
+	gpio_direction_output(IOX_STCP, 1);
+
+	for (i = 7; i >= 0; i--) {
+		gpio_direction_output(IOX_SHCP, 0);
+		gpio_direction_output(IOX_SDI, seq[qn_output[i]][1]);
+		udelay(500);
+		gpio_direction_output(IOX_SHCP, 1);
+		udelay(500);
+	}
+
+	gpio_direction_output(IOX_STCP, 0);
+	udelay(500);
+	/*
+	 * shift register will be output to pins
+	 */
+	gpio_direction_output(IOX_STCP, 1);
+
+	gpio_direction_output(IOX_OE, 1);
+};
+
+#ifdef CONFIG_SYS_I2C_MXC
+#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
+/* I2C1 for PMIC and EEPROM */
+struct i2c_pads_info i2c_pad_info1 = {
+	.scl = {
+		.i2c_mode =  MX6_PAD_UART4_TX_DATA__I2C1_SCL | PC,
+		.gpio_mode = MX6_PAD_UART4_TX_DATA__GPIO1_IO28 | PC,
+		.gp = IMX_GPIO_NR(1, 28),
+	},
+	.sda = {
+		.i2c_mode = MX6_PAD_UART4_RX_DATA__I2C1_SDA | PC,
+		.gpio_mode = MX6_PAD_UART4_RX_DATA__GPIO1_IO29 | PC,
+		.gp = IMX_GPIO_NR(1, 29),
+	},
+};
+#endif
+
+int dram_init(void)
+{
+	gd->ram_size = PHYS_SDRAM_SIZE;
+
+	return 0;
+}
+
+static iomux_v3_cfg_t const uart1_pads[] = {
+	MX6_PAD_UART1_TX_DATA__UART1_DCE_TX | MUX_PAD_CTRL(UART_PAD_CTRL),
+	MX6_PAD_UART1_RX_DATA__UART1_DCE_RX | MUX_PAD_CTRL(UART_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const usdhc1_pads[] = {
+	MX6_PAD_SD1_CLK__USDHC1_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD1_CMD__USDHC1_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD1_DATA0__USDHC1_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD1_DATA1__USDHC1_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD1_DATA2__USDHC1_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD1_DATA3__USDHC1_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+
+	/* VSELECT */
+	MX6_PAD_GPIO1_IO05__USDHC1_VSELECT | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	/* CD */
+	MX6_PAD_UART1_RTS_B__GPIO1_IO19 | MUX_PAD_CTRL(NO_PAD_CTRL),
+	/* RST_B */
+	MX6_PAD_GPIO1_IO09__GPIO1_IO09 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+/*
+ * mx6ul_14x14_evk board default supports sd card. If want to use
+ * EMMC, need to do board rework for sd2.
+ * Introduce CONFIG_MX6UL_14X14_EVK_EMMC_REWORK, if sd2 reworked to support
+ * emmc, need to define this macro.
+ */
+#if defined(CONFIG_MX6UL_14X14_EVK_EMMC_REWORK)
+static iomux_v3_cfg_t const usdhc2_emmc_pads[] = {
+	MX6_PAD_NAND_RE_B__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_WE_B__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA00__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA01__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA02__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA03__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA04__USDHC2_DATA4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA05__USDHC2_DATA5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA06__USDHC2_DATA6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA07__USDHC2_DATA7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+
+	/*
+	 * RST_B
+	 */
+	MX6_PAD_NAND_ALE__GPIO4_IO10 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+#else
+static iomux_v3_cfg_t const usdhc2_pads[] = {
+	MX6_PAD_NAND_RE_B__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_WE_B__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA00__USDHC2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA01__USDHC2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA02__USDHC2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_NAND_DATA03__USDHC2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const usdhc2_cd_pads[] = {
+	/*
+	 * The evk board uses DAT3 to detect CD card plugin,
+	 * in u-boot we mux the pin to GPIO when doing board_mmc_getcd.
+	 */
+	MX6_PAD_NAND_DATA03__GPIO4_IO05 | MUX_PAD_CTRL(USDHC_DAT3_CD_PAD_CTRL),
+};
+
+static iomux_v3_cfg_t const usdhc2_dat3_pads[] = {
+	MX6_PAD_NAND_DATA03__USDHC2_DATA3 |
+	MUX_PAD_CTRL(USDHC_DAT3_CD_PAD_CTRL),
+};
+#endif
+
+static void setup_iomux_uart(void)
+{
+	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
+}
+
+#ifdef CONFIG_FSL_QSPI
+
+#define QSPI_PAD_CTRL1	\
+	(PAD_CTL_SRE_FAST | PAD_CTL_SPEED_MED | \
+	 PAD_CTL_PKE | PAD_CTL_PUE | PAD_CTL_PUS_47K_UP | PAD_CTL_DSE_60ohm)
+
+static iomux_v3_cfg_t const quadspi_pads[] = {
+	MX6_PAD_NAND_WP_B__QSPI_A_SCLK | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+	MX6_PAD_NAND_READY_B__QSPI_A_DATA00 | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+	MX6_PAD_NAND_CE0_B__QSPI_A_DATA01 | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+	MX6_PAD_NAND_CE1_B__QSPI_A_DATA02 | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+	MX6_PAD_NAND_CLE__QSPI_A_DATA03 | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+	MX6_PAD_NAND_DQS__QSPI_A_SS0_B | MUX_PAD_CTRL(QSPI_PAD_CTRL1),
+};
+
+int board_qspi_init(void)
+{
+	/* Set the iomux */
+	imx_iomux_v3_setup_multiple_pads(quadspi_pads,
+					 ARRAY_SIZE(quadspi_pads));
+	/* Set the clock */
+	enable_qspi_clk(0);
+
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_FSL_ESDHC
+static struct fsl_esdhc_cfg usdhc_cfg[2] = {
+	{USDHC1_BASE_ADDR, 0, 4},
+#if defined(CONFIG_MX6UL_14X14_EVK_EMMC_REWORK)
+	{USDHC2_BASE_ADDR, 0, 8},
+#else
+	{USDHC2_BASE_ADDR, 0, 4},
+#endif
+};
+
+#define USDHC1_CD_GPIO	IMX_GPIO_NR(1, 19)
+#define USDHC1_PWR_GPIO	IMX_GPIO_NR(1, 9)
+#define USDHC2_CD_GPIO	IMX_GPIO_NR(4, 5)
+#define USDHC2_PWR_GPIO	IMX_GPIO_NR(4, 10)
+
+int board_mmc_getcd(struct mmc *mmc)
+{
+	struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+	int ret = 0;
+
+	switch (cfg->esdhc_base) {
+	case USDHC1_BASE_ADDR:
+		ret = !gpio_get_value(USDHC1_CD_GPIO);
+		break;
+	case USDHC2_BASE_ADDR:
+#if defined(CONFIG_MX6UL_14X14_EVK_EMMC_REWORK)
+		ret = 1;
+#else
+		imx_iomux_v3_setup_multiple_pads(usdhc2_cd_pads,
+						 ARRAY_SIZE(usdhc2_cd_pads));
+		gpio_direction_input(USDHC2_CD_GPIO);
+
+		/*
+		 * Since it is the DAT3 pin, this pin is pulled to
+		 * low voltage if no card
+		 */
+		ret = gpio_get_value(USDHC2_CD_GPIO);
+
+		imx_iomux_v3_setup_multiple_pads(usdhc2_dat3_pads,
+						 ARRAY_SIZE(usdhc2_dat3_pads));
+#endif
+		break;
+	}
+
+	return ret;
+}
+
+int board_mmc_init(bd_t *bis)
+{
+#ifdef CONFIG_SPL_BUILD
+#if defined(CONFIG_MX6UL_14X14_EVK_EMMC_REWORK)
+	imx_iomux_v3_setup_multiple_pads(usdhc2_emmc_pads,
+					 ARRAY_SIZE(usdhc2_emmc_pads));
+#else
+	imx_iomux_v3_setup_multiple_pads(usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
+#endif
+	gpio_direction_output(USDHC2_PWR_GPIO, 0);
+	udelay(500);
+	gpio_direction_output(USDHC2_PWR_GPIO, 1);
+	usdhc_cfg[1].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
+	return fsl_esdhc_initialize(bis, &usdhc_cfg[1]);
+#else
+	int i, ret;
+
+	/*
+	 * According to the board_mmc_init() the following map is done:
+	 * (U-boot device node)    (Physical Port)
+	 * mmc0                    USDHC1
+	 * mmc1                    USDHC2
+	 */
+	for (i = 0; i < CONFIG_SYS_FSL_USDHC_NUM; i++) {
+		switch (i) {
+		case 0:
+			imx_iomux_v3_setup_multiple_pads(
+				usdhc1_pads, ARRAY_SIZE(usdhc1_pads));
+			gpio_direction_input(USDHC1_CD_GPIO);
+			usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC_CLK);
+
+			gpio_direction_output(USDHC1_PWR_GPIO, 0);
+			udelay(500);
+			gpio_direction_output(USDHC1_PWR_GPIO, 1);
+			break;
+		case 1:
+#if defined(CONFIG_MX6UL_14X14_EVK_EMMC_REWORK)
+			imx_iomux_v3_setup_multiple_pads(
+				usdhc2_emmc_pads, ARRAY_SIZE(usdhc2_emmc_pads));
+#else
+			imx_iomux_v3_setup_multiple_pads(
+				usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
+#endif
+			gpio_direction_output(USDHC2_PWR_GPIO, 0);
+			udelay(500);
+			gpio_direction_output(USDHC2_PWR_GPIO, 1);
+			usdhc_cfg[1].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
+			break;
+		default:
+			printf("Warning: you configured more USDHC controllers (%d) than supported by the board\n", i + 1);
+			return -EINVAL;
+			}
+
+			ret = fsl_esdhc_initialize(bis, &usdhc_cfg[i]);
+			if (ret) {
+				printf("Warning: failed to initialize mmc dev %d\n", i);
+				return ret;
+			}
+	}
+#endif
+	return 0;
+}
+#endif
+
+#ifdef CONFIG_USB_EHCI_MX6
+#define USB_OTHERREGS_OFFSET	0x800
+#define UCTRL_PWR_POL		(1 << 9)
+
+static iomux_v3_cfg_t const usb_otg_pads[] = {
+	MX6_PAD_GPIO1_IO00__ANATOP_OTG1_ID | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+/* At default the 3v3 enables the MIC2026 for VBUS power */
+static void setup_usb(void)
+{
+	imx_iomux_v3_setup_multiple_pads(usb_otg_pads,
+					 ARRAY_SIZE(usb_otg_pads));
+}
+
+int board_usb_phy_mode(int port)
+{
+	if (port == 1)
+		return USB_INIT_HOST;
+	else
+		return usb_phy_mode(port);
+}
+
+int board_ehci_hcd_init(int port)
+{
+	u32 *usbnc_usb_ctrl;
+
+	if (port > 1)
+		return -EINVAL;
+
+	usbnc_usb_ctrl = (u32 *)(USB_BASE_ADDR + USB_OTHERREGS_OFFSET +
+				 port * 4);
+
+	/* Set Power polarity */
+	setbits_le32(usbnc_usb_ctrl, UCTRL_PWR_POL);
+
+	return 0;
+}
+#endif
+
+int board_early_init_f(void)
+{
+	setup_iomux_uart();
+
+	return 0;
+}
+
+int board_init(void)
+{
+	/* Address of boot parameters */
+	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
+
+	imx_iomux_v3_setup_multiple_pads(iox_pads, ARRAY_SIZE(iox_pads));
+
+	iox74lv_init();
+
+#ifdef CONFIG_SYS_I2C_MXC
+	setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
+#endif
+
+#ifdef CONFIG_USB_EHCI_MX6
+	setup_usb();
+#endif
+
+#ifdef CONFIG_FSL_QSPI
+	board_qspi_init();
+#endif
+
+	return 0;
+}
+
+#ifdef CONFIG_CMD_BMODE
+static const struct boot_mode board_boot_modes[] = {
+	/* 4 bit bus width */
+	{"sd1", MAKE_CFGVAL(0x42, 0x20, 0x00, 0x00)},
+	{"sd2", MAKE_CFGVAL(0x40, 0x28, 0x00, 0x00)},
+	{"qspi1", MAKE_CFGVAL(0x10, 0x00, 0x00, 0x00)},
+	{NULL,	 0},
+};
+#endif
+
+int board_late_init(void)
+{
+#ifdef CONFIG_CMD_BMODE
+	add_board_boot_modes(board_boot_modes);
+#endif
+
+	return 0;
+}
+
+u32 get_board_rev(void)
+{
+	return get_cpu_rev();
+}
+
+int checkboard(void)
+{
+	puts("Board: MX6UL 14x14 EVK\n");
+
+	return 0;
+}
+
+#ifdef CONFIG_SPL_BUILD
+#include <libfdt.h>
+#include <spl.h>
+#include <asm/arch/mx6-ddr.h>
+
+const struct mx6ul_iomux_ddr_regs mx6_ddr_ioregs = {
+	.dram_dqm0 = 0x00000030,
+	.dram_dqm1 = 0x00000030,
+	.dram_ras = 0x00000030,
+	.dram_cas = 0x00000030,
+	.dram_odt0 = 0x00000030,
+	.dram_odt1 = 0x00000030,
+	.dram_sdba2 = 0x00000000,
+	.dram_sdclk_0 = 0x00000008,
+	.dram_sdqs0 = 0x00000038,
+	.dram_sdqs1 = 0x00000030,
+	.dram_reset = 0x00000030,
+};
+
+const struct mx6ul_iomux_grp_regs mx6_grp_ioregs = {
+	.grp_addds = 0x00000030,
+	.grp_ddrmode_ctl = 0x00020000,
+	.grp_b0ds = 0x00000030,
+	.grp_ctlds = 0x00000030,
+	.grp_b1ds = 0x00000030,
+	.grp_ddrpke = 0x00000000,
+	.grp_ddrmode = 0x00020000,
+	.grp_ddr_type = 0x000c0000,
+};
+
+const struct mx6_mmdc_calibration mx6_mmcd_calib = {
+	.p0_mpwldectrl0 = 0x00070007,
+	.p0_mpdgctrl0 = 0x41490145,
+	.p0_mprddlctl = 0x40404546,
+	.p0_mpwrdlctl = 0x4040524D,
+};
+
+static struct mx6_ddr3_cfg mem_ddr = {
+	.mem_speed = 800,
+	.density = 4,
+	.width = 16,
+	.banks = 8,
+	.rowaddr = 15,
+	.coladdr = 10,
+	.pagesz = 2,
+	.trcd = 1375,
+	.trcmin = 4875,
+	.trasmin = 3500,
+};
+
+static void ccgr_init(void)
+{
+	struct mxc_ccm_reg *ccm = (struct mxc_ccm_reg *)CCM_BASE_ADDR;
+
+	writel(0xFFFFFFFF, &ccm->CCGR0);
+	writel(0xFFFFFFFF, &ccm->CCGR1);
+	writel(0xFFFFFFFF, &ccm->CCGR2);
+	writel(0xFFFFFFFF, &ccm->CCGR3);
+	writel(0xFFFFFFFF, &ccm->CCGR4);
+	writel(0xFFFFFFFF, &ccm->CCGR5);
+	writel(0xFFFFFFFF, &ccm->CCGR6);
+	writel(0xFFFFFFFF, &ccm->CCGR7);
+}
+
+static void spl_dram_init(void)
+{
+	struct mx6_ddr_sysinfo sysinfo = {
+		.dsize = 0,
+		.cs_density = 20,
+		.ncs = 1,
+		.cs1_mirror = 0,
+		.rtt_wr = 2,
+		.rtt_nom = 1,		/* RTT_Nom = RZQ/2 */
+		.walat = 1,		/* Write additional latency */
+		.ralat = 5,		/* Read additional latency */
+		.mif3_mode = 3,		/* Command prediction working mode */
+		.bi_on = 1,		/* Bank interleaving enabled */
+		.sde_to_rst = 0x10,	/* 14 cycles, 200us (JEDEC default) */
+		.rst_to_cke = 0x23,	/* 33 cycles, 500us (JEDEC default) */
+	};
+
+	mx6ul_dram_iocfg(mem_ddr.width, &mx6_ddr_ioregs, &mx6_grp_ioregs);
+	mx6_dram_cfg(&sysinfo, &mx6_mmcd_calib, &mem_ddr);
+}
+
+void board_init_f(ulong dummy)
+{
+	/* setup AIPS and disable watchdog */
+	arch_cpu_init();
+
+	ccgr_init();
+
+	/* iomux and setup of i2c */
+	board_early_init_f();
+
+	/* setup GP timer */
+	timer_init();
+
+	/* UART clocks enabled and gd valid - init serial console */
+	preloader_console_init();
+
+	/* DDR initialization */
+	spl_dram_init();
+
+	/* Clear the BSS. */
+	memset(__bss_start, 0, __bss_end - __bss_start);
+
+	/* load/boot image from boot device */
+	board_init_r(NULL, 0);
+}
+
+void reset_cpu(ulong addr)
+{
+}
+#endif

configs/mx6ul_14x14_evk_defconfig

+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=arch/arm/imx-common/spl_sd.cfg,MX6UL"
+CONFIG_ARM=y
+CONFIG_TARGET_MX6UL_14X14_EVK=y
+CONFIG_SPL=y

include/configs/mx6ul_14x14_evk.h

+/*
+ * Copyright (C) 2015 Freescale Semiconductor, Inc.
+ *
+ * Configuration settings for the Freescale i.MX6UL 14x14 EVK board.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+#ifndef __MX6UL_14X14_EVK_CONFIG_H
+#define __MX6UL_14X14_EVK_CONFIG_H
+
+
+#include <asm/arch/imx-regs.h>
+#include <linux/sizes.h>
+#include "mx6_common.h"
+#include <asm/imx-common/gpio.h>
+
+/* SPL options */
+#define CONFIG_SPL_LIBCOMMON_SUPPORT
+#define CONFIG_SPL_MMC_SUPPORT
+#define CONFIG_SPL_FAT_SUPPORT
+#include "imx6_spl.h"
+
+#define CONFIG_MX6
+#define CONFIG_ROM_UNIFIED_SECTIONS
+#define CONFIG_SYS_GENERIC_BOARD
+#define CONFIG_DISPLAY_CPUINFO
+#define CONFIG_DISPLAY_BOARDINFO
+
+/* Size of malloc() pool */
+#define CONFIG_SYS_MALLOC_LEN		(16 * SZ_1M)
+
+#define CONFIG_BOARD_EARLY_INIT_F
+#define CONFIG_BOARD_LATE_INIT
+
+#define CONFIG_MXC_UART
+#define CONFIG_MXC_UART_BASE		UART1_BASE
+
+#define CONFIG_CMD_FUSE
+#ifdef CONFIG_CMD_FUSE
+#define CONFIG_MXC_OCOTP
+#endif
+
+/* MMC Configs */
+#ifdef CONFIG_FSL_USDHC
+#define CONFIG_SYS_FSL_ESDHC_ADDR	USDHC2_BASE_ADDR
+
+/* NAND pin conflicts with usdhc2 */
+#ifdef CONFIG_NAND_MXS
+#define CONFIG_SYS_FSL_USDHC_NUM	1
+#else
+#define CONFIG_SYS_FSL_USDHC_NUM	2
+#endif
+
+#define CONFIG_SUPPORT_EMMC_BOOT /* eMMC specific */
+#endif
+
+#undef CONFIG_BOOTM_NETBSD
+#undef CONFIG_BOOTM_PLAN9
+#undef CONFIG_BOOTM_RTEMS
+
+#undef CONFIG_CMD_EXPORTENV
+#undef CONFIG_CMD_IMPORTENV
+
+/* I2C configs */
+#define CONFIG_CMD_I2C
+#ifdef CONFIG_CMD_I2C
+#define CONFIG_SYS_I2C
+#define CONFIG_SYS_I2C_MXC
+#define CONFIG_SYS_I2C_SPEED		100000
+#endif
+
+#define PHYS_SDRAM_SIZE			SZ_512M
+
+#undef CONFIG_CMD_IMLS
+
+#define CONFIG_SYS_MMC_IMG_LOAD_PART	1
+
+#define CONFIG_EXTRA_ENV_SETTINGS \
+	"script=boot.scr\0" \
+	"image=zImage\0" \
+	"console=ttymxc0\0" \
+	"fdt_high=0xffffffff\0" \
+	"initrd_high=0xffffffff\0" \
+	"fdt_file=imx6ul-14x14-evk.dtb\0" \
+	"fdt_addr=0x83000000\0" \
+	"boot_fdt=try\0" \
+	"ip_dyn=yes\0" \
+	"mmcdev="__stringify(CONFIG_SYS_MMC_ENV_DEV)"\0" \
+	"mmcpart=" __stringify(CONFIG_SYS_MMC_IMG_LOAD_PART) "\0" \
+	"mmcroot=" CONFIG_MMCROOT " rootwait rw\0" \
+	"mmcautodetect=yes\0" \
+	"mmcargs=setenv bootargs console=${console},${baudrate} " \
+		"root=${mmcroot}\0" \
+	"loadbootscript=" \
+		"fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \
+	"bootscript=echo Running bootscript from mmc ...; " \
+		"source\0" \
+	"loadimage=fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${image}\0" \
+	"loadfdt=fatload mmc ${mmcdev}:${mmcpart} ${fdt_addr} ${fdt_file}\0" \
+	"mmcboot=echo Booting from mmc ...; " \
+		"run mmcargs; " \
+		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
+			"if run loadfdt; then " \
+				"bootz ${loadaddr} - ${fdt_addr}; " \
+			"else " \
+				"if test ${boot_fdt} = try; then " \
+					"bootz; " \
+				"else " \
+					"echo WARN: Cannot load the DT; " \
+				"fi; " \
+			"fi; " \
+		"else " \
+			"bootz; " \
+		"fi;\0" \
+	"netargs=setenv bootargs console=${console},${baudrate} " \
+		"root=/dev/nfs " \
+	"ip=dhcp nfsroot=${serverip}:${nfsroot},v3,tcp\0" \
+		"netboot=echo Booting from net ...; " \
+		"run netargs; " \
+		"if test ${ip_dyn} = yes; then " \
+			"setenv get_cmd dhcp; " \
+		"else " \
+			"setenv get_cmd tftp; " \
+		"fi; " \
+		"${get_cmd} ${image}; " \
+		"if test ${boot_fdt} = yes || test ${boot_fdt} = try; then " \
+			"if ${get_cmd} ${fdt_addr} ${fdt_file}; then " \
+				"bootz ${loadaddr} - ${fdt_addr}; " \
+			"else " \
+				"if test ${boot_fdt} = try; then " \
+					"bootz; " \
+				"else " \
+					"echo WARN: Cannot load the DT; " \
+				"fi; " \
+			"fi; " \
+		"else " \
+			"bootz; " \
+		"fi;\0"
+
+#define CONFIG_BOOTCOMMAND \
+	   "mmc dev ${mmcdev};" \
+	   "mmc dev ${mmcdev}; if mmc rescan; then " \
+		   "if run loadbootscript; then " \
+			   "run bootscript; " \
+		   "else " \
+			   "if run loadimage; then " \
+				   "run mmcboot; " \
+			   "else run netboot; " \
+			   "fi; " \
+		   "fi; " \
+	   "else run netboot; fi"
+
+/* Miscellaneous configurable options */
+#define CONFIG_SYS_PROMPT		"=> "
+/* Print Buffer Size */
+#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)
+
+#define CONFIG_CMD_MEMTEST
+#define CONFIG_SYS_MEMTEST_START	0x80000000
+#define CONFIG_SYS_MEMTEST_END		(CONFIG_SYS_MEMTEST_START + 0x10000000)
+
+#define CONFIG_SYS_LOAD_ADDR		CONFIG_LOADADDR
+#define CONFIG_SYS_HZ			1000
+
+#define CONFIG_CMDLINE_EDITING
+#define CONFIG_STACKSIZE		SZ_128K
+
+/* Physical Memory Map */
+#define CONFIG_NR_DRAM_BANKS		1
+#define PHYS_SDRAM			MMDC0_ARB_BASE_ADDR
+
+#define CONFIG_SYS_SDRAM_BASE		PHYS_SDRAM
+#define CONFIG_SYS_INIT_RAM_ADDR	IRAM_BASE_ADDR
+#define CONFIG_SYS_INIT_RAM_SIZE	IRAM_SIZE
+
+#define CONFIG_SYS_INIT_SP_OFFSET \
+	(CONFIG_SYS_INIT_RAM_SIZE - GENERATED_GBL_DATA_SIZE)
+#define CONFIG_SYS_INIT_SP_ADDR \
+	(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)
+
+/* FLASH and environment organization */
+#define CONFIG_SYS_NO_FLASH
+
+#define CONFIG_ENV_SIZE			SZ_8K
+#define CONFIG_ENV_IS_IN_MMC
+#define CONFIG_ENV_OFFSET		(8 * SZ_64K)
+#define CONFIG_SYS_MMC_ENV_DEV		1   /* USDHC2 */
+#define CONFIG_SYS_MMC_ENV_PART		0	/* user area */
+#define CONFIG_MMCROOT			"/dev/mmcblk1p2"  /* USDHC2 */
+
+#define CONFIG_OF_LIBFDT
+#define CONFIG_CMD_BOOTZ
+#define CONFIG_CMD_BMODE
+
+#ifndef CONFIG_SYS_DCACHE_OFF
+#define CONFIG_CMD_CACHE
+#endif
+
+#define CONFIG_FSL_QSPI
+#ifdef CONFIG_FSL_QSPI
+#define CONFIG_CMD_SF
+#define CONFIG_SPI_FLASH
+#define CONFIG_SPI_FLASH_STMICRO
+#define CONFIG_SPI_FLASH_BAR
+#define CONFIG_SF_DEFAULT_BUS		0
+#define CONFIG_SF_DEFAULT_CS		0
+#define CONFIG_SF_DEFAULT_SPEED	40000000
+#define CONFIG_SF_DEFAULT_MODE		SPI_MODE_0
+#define FSL_QSPI_FLASH_NUM		1
+#define FSL_QSPI_FLASH_SIZE		SZ_32M
+#endif
+
+/* USB Configs */
+#define CONFIG_CMD_USB
+#ifdef CONFIG_CMD_USB
+#define CONFIG_USB_EHCI
+#define CONFIG_USB_EHCI_MX6
+#define CONFIG_USB_STORAGE
+#define CONFIG_EHCI_HCD_INIT_AFTER_RESET
+#define CONFIG_MXC_USB_PORTSC  (PORT_PTS_UTMI | PORT_PTS_PTW)
+#define CONFIG_MXC_USB_FLAGS   0
+#define CONFIG_USB_MAX_CONTROLLER_COUNT 2
+#endif
+
+#define CONFIG_IMX6_THERMAL
+
+#endif