arm: mx6: tqma6: Add WRU-IV baseboard for the TQMa6 SoM

This patch adds support for the "OHB System AG" baseboard with is equipped with the TQMa6S SoM.

Signed-off-by Stefan Roese <[email protected]>

Cc Markus Niebel <[email protected]>

Cc Stefano Babic <[email protected]>

---
 board/tqc/tqma6/Makefile          |   1 +
 board/tqc/tqma6/tqma6_wru4.c      | 352 ++++++++++++++++++++++++++++++++++++++
 configs/tqma6s_wru4_mmc_defconfig |  10 ++
 include/configs/tqma6.h           |   2 +
 include/configs/tqma6_wru4.h      |  71 ++++++++
 5 files changed, 436 insertions(+)
 create mode 100644 board/tqc/tqma6/tqma6_wru4.c
 create mode 100644 configs/tqma6s_wru4_mmc_defconfig
 create mode 100644 include/configs/tqma6_wru4.h

board/tqc/tqma6/Makefile +1 -0

index 9ee6920..19b56d0 100644
@@ -7,3 +7,4 @@
 obj-y  := tqma6.o
 
 obj-$(CONFIG_MBA6) += tqma6_mba6.o
+obj-$(CONFIG_WRU4) += tqma6_wru4.o

board/tqc/tqma6/tqma6_wru4.c new file +193 -0

new file mode 100644
index 0000000..1f47e8c
@@ -0,0 +1,352 @@
+/*
+ * Copyright (C) 2012 Freescale Semiconductor, Inc.
+ * Author: Fabio Estevam <[email protected]>
+ *
+ * Copyright (C) 2013, 2014 TQ Systems (ported SabreSD to TQMa6x)
+ * Author: Markus Niebel <[email protected]>
+ *
+ * Copyright (C) 2015 Stefan Roese <[email protected]>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <asm/io.h>
+#include <asm/arch/clock.h>
+#include <asm/arch/mx6-pins.h>
+#include <asm/arch/imx-regs.h>
+#include <asm/arch/iomux.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/errno.h>
+#include <asm/gpio.h>
+#include <asm/imx-common/boot_mode.h>
+#include <asm/imx-common/mxc_i2c.h>
+
+#include <common.h>
+#include <fsl_esdhc.h>
+#include <libfdt.h>
+#include <malloc.h>
+#include <i2c.h>
+#include <micrel.h>
+#include <miiphy.h>
+#include <mmc.h>
+#include <netdev.h>
+
+#include "tqma6_bb.h"
+
+/* UART */
+#define UART4_PAD_CTRL (			\
+		PAD_CTL_HYS |			\
+		PAD_CTL_PUS_100K_UP |		\
+		PAD_CTL_PUE |			\
+		PAD_CTL_PKE |			\
+		PAD_CTL_SPEED_MED |		\
+		PAD_CTL_DSE_40ohm |		\
+		PAD_CTL_SRE_SLOW		\
+		)
+
+static iomux_v3_cfg_t const uart4_pads[] = {
+	NEW_PAD_CTRL(MX6_PAD_CSI0_DAT17__UART4_CTS_B, UART4_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_CSI0_DAT16__UART4_RTS_B, UART4_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_CSI0_DAT13__UART4_RX_DATA, UART4_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_CSI0_DAT12__UART4_TX_DATA, UART4_PAD_CTRL),
+};
+
+static void setup_iomuxc_uart4(void)
+{
+	imx_iomux_v3_setup_multiple_pads(uart4_pads, ARRAY_SIZE(uart4_pads));
+}
+
+/* MMC */
+#define USDHC2_PAD_CTRL (			\
+		PAD_CTL_HYS |			\
+		PAD_CTL_PUS_47K_UP |		\
+		PAD_CTL_SPEED_LOW |		\
+		PAD_CTL_DSE_80ohm |		\
+		PAD_CTL_SRE_FAST		\
+		)
+
+#define USDHC2_CLK_PAD_CTRL (			\
+		PAD_CTL_HYS |			\
+		PAD_CTL_PUS_47K_UP |		\
+		PAD_CTL_SPEED_LOW |		\
+		PAD_CTL_DSE_40ohm |		\
+		PAD_CTL_SRE_FAST		\
+		)
+
+static iomux_v3_cfg_t const usdhc2_pads[] = {
+	NEW_PAD_CTRL(MX6_PAD_SD2_CLK__SD2_CLK, USDHC2_CLK_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_SD2_CMD__SD2_CMD, USDHC2_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_SD2_DAT0__SD2_DATA0, USDHC2_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_SD2_DAT1__SD2_DATA1, USDHC2_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_SD2_DAT2__SD2_DATA2, USDHC2_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_SD2_DAT3__SD2_DATA3, USDHC2_PAD_CTRL),
+
+	NEW_PAD_CTRL(MX6_PAD_GPIO_4__GPIO1_IO04, USDHC2_PAD_CTRL), /* CD */
+	NEW_PAD_CTRL(MX6_PAD_GPIO_2__SD2_WP, USDHC2_PAD_CTRL), /* WP */
+};
+
+#define USDHC2_CD_GPIO IMX_GPIO_NR(1, 4)
+#define USDHC2_WP_GPIO IMX_GPIO_NR(1, 2)
+
+static struct fsl_esdhc_cfg usdhc2_cfg = {
+	.esdhc_base = USDHC2_BASE_ADDR,
+	.max_bus_width = 4,
+};
+
+int tqma6_bb_board_mmc_getcd(struct mmc *mmc)
+{
+	struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+	int ret = 0;
+
+	if (cfg->esdhc_base == USDHC2_BASE_ADDR)
+		ret = !gpio_get_value(USDHC2_CD_GPIO);
+
+	return ret;
+}
+
+int tqma6_bb_board_mmc_getwp(struct mmc *mmc)
+{
+	struct fsl_esdhc_cfg *cfg = (struct fsl_esdhc_cfg *)mmc->priv;
+	int ret = 0;
+
+	if (cfg->esdhc_base == USDHC2_BASE_ADDR)
+		ret = gpio_get_value(USDHC2_WP_GPIO);
+
+	return ret;
+}
+
+int tqma6_bb_board_mmc_init(bd_t *bis)
+{
+	imx_iomux_v3_setup_multiple_pads(usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
+	gpio_direction_input(USDHC2_CD_GPIO);
+	gpio_direction_input(USDHC2_WP_GPIO);
+
+	usdhc2_cfg.sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
+	if(fsl_esdhc_initialize(bis, &usdhc2_cfg))
+		puts("WARNING: failed to initialize SD\n");
+
+	return 0;
+}
+
+/* Ethernet */
+#define ENET_PAD_CTRL (				\
+		PAD_CTL_HYS |			\
+		PAD_CTL_PUS_100K_UP |		\
+		PAD_CTL_PUE |			\
+		PAD_CTL_PKE |			\
+		PAD_CTL_SPEED_MED |		\
+		PAD_CTL_DSE_40ohm |		\
+		PAD_CTL_SRE_SLOW		\
+		)
+
+static iomux_v3_cfg_t const enet_pads[] = {
+	NEW_PAD_CTRL(MX6_PAD_ENET_MDC__ENET_MDC, ENET_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_ENET_MDIO__ENET_MDIO, ENET_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_GPIO_16__ENET_REF_CLK, ENET_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_ENET_RXD0__ENET_RX_DATA0, ENET_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_ENET_RXD1__ENET_RX_DATA1, ENET_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_ENET_CRS_DV__ENET_RX_EN, ENET_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_ENET_RX_ER__ENET_RX_ER, ENET_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_ENET_TXD0__ENET_TX_DATA0, ENET_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_ENET_TXD1__ENET_TX_DATA1, ENET_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_ENET_TX_EN__ENET_TX_EN, ENET_PAD_CTRL),
+	NEW_PAD_CTRL(MX6_PAD_GPIO_19__ENET_TX_ER, ENET_PAD_CTRL),
+
+	/* ENET1 reset */
+	NEW_PAD_CTRL(MX6_PAD_GPIO_8__GPIO1_IO08, ENET_PAD_CTRL),
+	/* ENET1 interrupt */
+	NEW_PAD_CTRL(MX6_PAD_GPIO_9__GPIO1_IO09, ENET_PAD_CTRL),
+};
+
+#define ENET_PHY_RESET_GPIO IMX_GPIO_NR(1, 8)
+
+static void setup_iomuxc_enet(void)
+{
+	imx_iomux_v3_setup_multiple_pads(enet_pads, ARRAY_SIZE(enet_pads));
+
+	/* Reset LAN8720 PHY */
+	gpio_direction_output(ENET_PHY_RESET_GPIO , 0);
+	udelay(1000);
+	gpio_set_value(ENET_PHY_RESET_GPIO, 1);
+}
+
+int board_eth_init(bd_t *bis)
+{
+	uint32_t base = IMX_FEC_BASE;
+	struct mii_dev *bus = NULL;
+	struct phy_device *phydev = NULL;
+	int ret;
+
+	bus = fec_get_miibus(base, -1);
+	if (!bus) {
+		puts("MII bus not found\n");
+		return 0;
+	}
+
+	/* scan phy */
+	phydev = phy_find_by_mask(bus, (0xf << CONFIG_FEC_MXC_PHYADDR),
+				  PHY_INTERFACE_MODE_RMII);
+	if (!phydev) {
+		free(bus);
+		puts("No phy found\n");
+		return 0;
+	}

board/tqc/tqma6/tqma6_wru4.c new file +18 -0

+
+/* GPIO */
+#define GPIO_PAD_CTRL (				\
+		PAD_CTL_HYS |			\
+		PAD_CTL_PUS_100K_UP |		\
+		PAD_CTL_PUE |			\
+		PAD_CTL_SPEED_MED |		\
+		PAD_CTL_DSE_40ohm |		\
+		PAD_CTL_SRE_SLOW		\
+		)
+
+#define GPIO_OD_PAD_CTRL (			\
+		PAD_CTL_HYS |			\
+		PAD_CTL_PUS_100K_UP |		\
+		PAD_CTL_PUE |			\
+		PAD_CTL_ODE |			\
+		PAD_CTL_SPEED_MED |		\
+		PAD_CTL_DSE_40ohm |		\

board/tqc/tqma6/tqma6_wru4.c new file +19 -0

+	/* PCIE_RST */
+	NEW_PAD_CTRL(MX6_PAD_NANDF_CLE__GPIO6_IO07, GPIO_OD_PAD_CTRL),
+	/* UART1_PWRON */
+	NEW_PAD_CTRL(MX6_PAD_DISP0_DAT14__GPIO5_IO08, GPIO_PAD_CTRL),
+	/* UART2_PWRON */
+	NEW_PAD_CTRL(MX6_PAD_DISP0_DAT16__GPIO5_IO10, GPIO_PAD_CTRL),
+	/* UART3_PWRON */
+	NEW_PAD_CTRL(MX6_PAD_DISP0_DAT18__GPIO5_IO12, GPIO_PAD_CTRL),
+};
+
+#define GPIO_USB_H_PWR		IMX_GPIO_NR(1, 0)
+#define GPIO_USB_OTG_PWR	IMX_GPIO_NR(3, 22)
+#define GPIO_ENET1_RST		IMX_GPIO_NR(1, 8)
+#define GPIO_PCIE_RST		IMX_GPIO_NR(6, 7)
+#define GPIO_UART1_PWRON	IMX_GPIO_NR(5, 8)
+#define GPIO_UART2_PWRON	IMX_GPIO_NR(5, 10)
+#define GPIO_UART3_PWRON	IMX_GPIO_NR(5, 12)
+
+static void gpio_init(void)

board/tqc/tqma6/tqma6_wru4.c new file +92 -0

+}
+
+void tqma6_iomuxc_spi(void)
+{
+	/* No SPI on this baseboard */
+}
+
+int tqma6_bb_board_early_init_f(void)
+{
+	setup_iomuxc_uart4();
+
+	return 0;
+}
+
+int tqma6_bb_board_init(void)
+{
+	setup_iomuxc_enet();
+
+	gpio_init();
+
+	/* Turn the UART-couplers on one-after-another */
+	gpio_set_value(GPIO_UART1_PWRON, 1);
+	mdelay(10);
+	gpio_set_value(GPIO_UART2_PWRON, 1);
+	mdelay(10);
+	gpio_set_value(GPIO_UART3_PWRON, 1);
+
+	return 0;
+}
+
+int tqma6_bb_board_late_init(void)
+{
+	return 0;
+}
+
+const char *tqma6_bb_get_boardname(void)
+{
+	return "WRU-IV";
+}
+
+static const struct boot_mode board_boot_modes[] = {
+	/* 4 bit bus width */
+	{"sd2",	 MAKE_CFGVAL(0x40, 0x28, 0x00, 0x00)},
+	/* 8 bit bus width */
+	{"emmc", MAKE_CFGVAL(0x40, 0x28, 0x00, 0x00)},
+	{ NULL, 0 },
+};
+
+int misc_init_r(void)
+{
+	add_board_boot_modes(board_boot_modes);
+
+	return 0;
+}
+
+#define WRU4_USB_H1_PWR		IMX_GPIO_NR(1, 0)
+#define WRU4_USB_OTG_PWR	IMX_GPIO_NR(3, 22)
+
+int board_ehci_hcd_init(int port)
+{
+	int ret;
+
+	ret = gpio_request(WRU4_USB_H1_PWR, "usb-h1-pwr");
+	if (!ret)
+		gpio_direction_output(WRU4_USB_H1_PWR, 1);
+
+	ret = gpio_request(WRU4_USB_OTG_PWR, "usb-OTG-pwr");
+	if (!ret)
+		gpio_direction_output(WRU4_USB_OTG_PWR, 1);
+
+	return 0;
+}
+
+int board_ehci_power(int port, int on)
+{
+	if (port)
+		gpio_set_value(WRU4_USB_OTG_PWR, on);
+	else
+		gpio_set_value(WRU4_USB_H1_PWR, on);
+
+	return 0;
+}
+
+/*
+ * Device Tree Support
+ */
+#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
+void tqma6_bb_ft_board_setup(void *blob, bd_t *bd)
+{
+	/* TBD */
+}
+#endif /* defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) */

configs/tqma6s_wru4_mmc_defconfig new file +0 -0

new file mode 100644
index 0000000..74bca0b

include/configs/tqma6.h +2 -0

index 00294f6..f807d08 100644
@@ -394,6 +394,8 @@
  */
 #ifdef CONFIG_MBA6
 #include "tqma6_mba6.h"
+#elif CONFIG_WRU4
+#include "tqma6_wru4.h"
 #else
 #error "No baseboard for the TQMa6 defined!"
 #endif

include/configs/tqma6_wru4.h new file +71 -0

new file mode 100644
index 0000000..1c86bc0
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2015 Stefan Roese <[email protected]>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __CONFIG_TQMA6_WRU4_H
+#define __CONFIG_TQMA6_WRU4_H
+
+#define CONFIG_DEFAULT_FDT_FILE		"imx6s-wru4.dtb"
+
+/* DTT sensors */
+#define CONFIG_DTT_SENSORS		{ 0, 1 }
+#define CONFIG_SYS_DTT_BUS_NUM		2
+
+/* Ethernet */
+#define CONFIG_FEC_XCV_TYPE		RMII
+#define CONFIG_ETHPRIME			"FEC"
+#define CONFIG_FEC_MXC_PHYADDR		0x01
+#define CONFIG_PHY_SMSC
+
+/* UART */
+#define CONFIG_MXC_UART_BASE		UART4_BASE
+#define CONFIG_CONSOLE_DEV		"ttymxc3"
+
+#define CONFIG_MISC_INIT_R
+
+/* Watchdog */
+#define CONFIG_HW_WATCHDOG
+#define CONFIG_IMX_WATCHDOG
+#define CONFIG_WATCHDOG_TIMEOUT_MSECS	60000
+
+/* Config on-board RTC */
+#define CONFIG_RTC_DS1337
+#define CONFIG_SYS_RTC_BUS_NUM		2
+#define CONFIG_SYS_I2C_RTC_ADDR		0x68
+/* Turn off RTC square-wave output to save battery */
+#define CONFIG_SYS_RTC_DS1337_NOOSC
+#define CONFIG_CMD_DATE
+
+#define CONFIG_CMD_GPIO
+
+/* LED */
+#define CONFIG_CMD_LED
+#define CONFIG_STATUS_LED
+#define CONFIG_BOARD_SPECIFIC_LED
+#define STATUS_LED_BIT			0
+#define STATUS_LED_STATE		STATUS_LED_ON
+#define STATUS_LED_PERIOD		(CONFIG_SYS_HZ / 2)
+#define STATUS_LED_BIT1			1
+#define STATUS_LED_STATE1		STATUS_LED_ON
+#define STATUS_LED_PERIOD1		(CONFIG_SYS_HZ / 2)
+#define STATUS_LED_BIT2			2
+#define STATUS_LED_STATE2		STATUS_LED_ON
+#define STATUS_LED_PERIOD2		(CONFIG_SYS_HZ / 2)
+#define STATUS_LED_BIT3			3
+#define STATUS_LED_STATE3		STATUS_LED_ON
+#define STATUS_LED_PERIOD3		(CONFIG_SYS_HZ / 2)
+#define STATUS_LED_BIT4			4
+#define STATUS_LED_STATE4		STATUS_LED_ON
+#define STATUS_LED_PERIOD4		(CONFIG_SYS_HZ / 2)
+#define STATUS_LED_BIT5			5
+#define STATUS_LED_STATE5		STATUS_LED_ON
+#define STATUS_LED_PERIOD5		(CONFIG_SYS_HZ / 2)
+
+/* Bootcounter */
+#define CONFIG_BOOTCOUNT_LIMIT
+#define CONFIG_SYS_BOOTCOUNT_ADDR	IRAM_BASE_ADDR
+#define CONFIG_SYS_BOOTCOUNT_BE
+
+#endif /* __CONFIG_TQMA6_WRU4_H */

Quoted 26 lines

board/tqc/tqma6/tqma6_wru4.c new file +26 -0

+int board_eth_init(bd_t *bis)
+{
+	uint32_t base = IMX_FEC_BASE;
+	struct mii_dev *bus = NULL;
+	struct phy_device *phydev = NULL;
+	int ret;
+
+	bus = fec_get_miibus(base, -1);
+	if (!bus) {
+		puts("MII bus not found\n");
+		return 0;
+	}
+
+	/* scan phy */
+	phydev = phy_find_by_mask(bus, (0xf << CONFIG_FEC_MXC_PHYADDR),
+				  PHY_INTERFACE_MODE_RMII);
+	if (!phydev) {
+		free(bus);
+		puts("No phy found\n");
+		return 0;
+	}
+
+	ret  = fec_probe(bis, -1, base, bus, phydev);
+	if (ret) {
+		puts("FEC MXC: probe failed\n");
+		free(phydev);

board/tqc/tqma6/tqma6_wru4.c line 203

Quoted 5 lines

board/tqc/tqma6/tqma6_wru4.c new file +5 -0

+		free(bus);
+	}
+
+	return 0;
+}

This was implemented in the original starter kit code to implement the phy specific setup in board_phy_config. Your phy should not need this.

Quoted 22 lines

board/tqc/tqma6/tqma6_wru4.c new file +22 -0

+
+/* GPIO */
+#define GPIO_PAD_CTRL (				\
+		PAD_CTL_HYS |			\
+		PAD_CTL_PUS_100K_UP |		\
+		PAD_CTL_PUE |			\
+		PAD_CTL_SPEED_MED |		\
+		PAD_CTL_DSE_40ohm |		\
+		PAD_CTL_SRE_SLOW		\
+		)
+
+#define GPIO_OD_PAD_CTRL (			\
+		PAD_CTL_HYS |			\
+		PAD_CTL_PUS_100K_UP |		\
+		PAD_CTL_PUE |			\
+		PAD_CTL_ODE |			\
+		PAD_CTL_SPEED_MED |		\
+		PAD_CTL_DSE_40ohm |		\
+		PAD_CTL_SRE_SLOW		\
+		)
+
+static iomux_v3_cfg_t const gpio_pads[] = {

board/tqc/tqma6/tqma6_wru4.c line 231

Quoted 6 lines

board/tqc/tqma6/tqma6_wru4.c new file +6 -0

+	/* USB_H_PWR */
+	NEW_PAD_CTRL(MX6_PAD_GPIO_0__GPIO1_IO00, GPIO_PAD_CTRL),
+	/* USB_OTG_PWR */
+	NEW_PAD_CTRL(MX6_PAD_EIM_D22__GPIO3_IO22, GPIO_PAD_CTRL),
+	/* ENET1_RST */
+	NEW_PAD_CTRL(MX6_PAD_GPIO_8__GPIO1_IO08, GPIO_PAD_CTRL),

This GPIO is already initialized in setup_iomuxc_enet.

Quoted 25 lines

board/tqc/tqma6/tqma6_wru4.c new file +25 -0

+	/* PCIE_RST */
+	NEW_PAD_CTRL(MX6_PAD_NANDF_CLE__GPIO6_IO07, GPIO_OD_PAD_CTRL),
+	/* UART1_PWRON */
+	NEW_PAD_CTRL(MX6_PAD_DISP0_DAT14__GPIO5_IO08, GPIO_PAD_CTRL),
+	/* UART2_PWRON */
+	NEW_PAD_CTRL(MX6_PAD_DISP0_DAT16__GPIO5_IO10, GPIO_PAD_CTRL),
+	/* UART3_PWRON */
+	NEW_PAD_CTRL(MX6_PAD_DISP0_DAT18__GPIO5_IO12, GPIO_PAD_CTRL),
+};
+
+#define GPIO_USB_H_PWR		IMX_GPIO_NR(1, 0)
+#define GPIO_USB_OTG_PWR	IMX_GPIO_NR(3, 22)
+#define GPIO_ENET1_RST		IMX_GPIO_NR(1, 8)
+#define GPIO_PCIE_RST		IMX_GPIO_NR(6, 7)
+#define GPIO_UART1_PWRON	IMX_GPIO_NR(5, 8)
+#define GPIO_UART2_PWRON	IMX_GPIO_NR(5, 10)
+#define GPIO_UART3_PWRON	IMX_GPIO_NR(5, 12)
+
+static void gpio_init(void)
+{
+	imx_iomux_v3_setup_multiple_pads(gpio_pads, ARRAY_SIZE(gpio_pads));
+
+	gpio_direction_output(GPIO_USB_H_PWR, 1);
+	gpio_direction_output(GPIO_USB_OTG_PWR, 1);
+	gpio_direction_output(GPIO_ENET1_RST, 1);

board/tqc/tqma6/tqma6_wru4.c line 260

Quoted 4 lines

board/tqc/tqma6/tqma6_wru4.c new file +4 -0

+	gpio_direction_output(GPIO_PCIE_RST, 1);
+	gpio_direction_output(GPIO_UART1_PWRON, 0);
+	gpio_direction_output(GPIO_UART2_PWRON, 0);
+	gpio_direction_output(GPIO_UART3_PWRON, 0);

Some GPIO (USB) are requested later in USB specific code. I would prefer requesting all used GPIO - then the transition to DM_GPIO would be prepared already.

Quoted 103 lines

board/tqc/tqma6/tqma6_wru4.c new file +92 -0

+}
+
+void tqma6_iomuxc_spi(void)
+{
+	/* No SPI on this baseboard */
+}
+
+int tqma6_bb_board_early_init_f(void)
+{
+	setup_iomuxc_uart4();
+
+	return 0;
+}
+
+int tqma6_bb_board_init(void)
+{
+	setup_iomuxc_enet();
+
+	gpio_init();
+
+	/* Turn the UART-couplers on one-after-another */
+	gpio_set_value(GPIO_UART1_PWRON, 1);
+	mdelay(10);
+	gpio_set_value(GPIO_UART2_PWRON, 1);
+	mdelay(10);
+	gpio_set_value(GPIO_UART3_PWRON, 1);
+
+	return 0;
+}
+
+int tqma6_bb_board_late_init(void)
+{
+	return 0;
+}
+
+const char *tqma6_bb_get_boardname(void)
+{
+	return "WRU-IV";
+}
+
+static const struct boot_mode board_boot_modes[] = {
+	/* 4 bit bus width */
+	{"sd2",	 MAKE_CFGVAL(0x40, 0x28, 0x00, 0x00)},
+	/* 8 bit bus width */
+	{"emmc", MAKE_CFGVAL(0x40, 0x28, 0x00, 0x00)},
+	{ NULL, 0 },
+};
+
+int misc_init_r(void)
+{
+	add_board_boot_modes(board_boot_modes);
+
+	return 0;
+}
+
+#define WRU4_USB_H1_PWR		IMX_GPIO_NR(1, 0)
+#define WRU4_USB_OTG_PWR	IMX_GPIO_NR(3, 22)
+
+int board_ehci_hcd_init(int port)
+{
+	int ret;
+
+	ret = gpio_request(WRU4_USB_H1_PWR, "usb-h1-pwr");
+	if (!ret)
+		gpio_direction_output(WRU4_USB_H1_PWR, 1);
+
+	ret = gpio_request(WRU4_USB_OTG_PWR, "usb-OTG-pwr");
+	if (!ret)
+		gpio_direction_output(WRU4_USB_OTG_PWR, 1);
+
+	return 0;
+}
+
+int board_ehci_power(int port, int on)
+{
+	if (port)
+		gpio_set_value(WRU4_USB_OTG_PWR, on);
+	else
+		gpio_set_value(WRU4_USB_H1_PWR, on);
+
+	return 0;
+}
+
+/*
+ * Device Tree Support
+ */
+#if defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT)
+void tqma6_bb_ft_board_setup(void *blob, bd_t *bd)
+{
+	/* TBD */
+}
+#endif /* defined(CONFIG_OF_BOARD_SETUP) && defined(CONFIG_OF_LIBFDT) */

configs/tqma6s_wru4_mmc_defconfig new file +5 -0

new file mode 100644
index 0000000..74bca0b
@@ -0,0 +1,10 @@
+CONFIG_ARM=y
+CONFIG_TARGET_TQMA6=y
+CONFIG_CMD_SETEXPR=y
+CONFIG_CMD_NET=y
+CONFIG_SYS_EXTRA_OPTIONS="IMX_CONFIG=board/tqc/tqma6/tqma6s.cfg,MX6S,WRU4,TQMA6X_MMC_BOOT"

configs/tqma6s_wru4_mmc_defconfig line 10

Quoted 5 lines

configs/tqma6s_wru4_mmc_defconfig new file +5 -0

+CONFIG_AUTOBOOT_KEYED=y
+CONFIG_AUTOBOOT_PROMPT="Enter password in %d seconds to stop autoboot\n"
+CONFIG_AUTOBOOT_ENCRYPTION=y
+CONFIG_AUTOBOOT_STOP_STR_SHA256="36a9e7f1c95b82ffb99743e0c5c4ce95d83c9a430aac59f84ef3cbfab6145068"
+CONFIG_PCA9551_LED=y

Did you notice the patches for TQMa6 related config rework? (arm: imx6: tqma6: Kconfig rework from 2015/06/04)