cgtqmx6eval: Add SPI NOR flash support

Add SPI NOR support:

=> sf probe
SF: Detected SST25VF032B with page size 256 Bytes, erase size 4 KiB, total 4 MiB

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>

board/congatec/cgtqmx6eval/cgtqmx6eval.c

@@ -45,6 +45,10 @@ DECLARE_GLOBAL_DATA_PTR;
 	PAD_CTL_DSE_40ohm | PAD_CTL_HYS |			\
 	PAD_CTL_ODE | PAD_CTL_SRE_FAST)
 
+#define SPI_PAD_CTRL (PAD_CTL_HYS |				\
+	PAD_CTL_SPEED_MED |		\
+	PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST)
+
 #define MX6Q_QMX6_PFUZE_MUX		IMX_GPIO_NR(6, 9)
 
 
@@ -152,6 +156,13 @@ static iomux_v3_cfg_t enet_pads_ar8035[] = {
 	MX6_PAD_RGMII_RX_CTL__RGMII_RX_CTL | MUX_PAD_CTRL(ENET_PAD_CTRL),
 };
 
+static iomux_v3_cfg_t const ecspi1_pads[] = {
+	MX6_PAD_EIM_D16__ECSPI1_SCLK | MUX_PAD_CTRL(SPI_PAD_CTRL),
+	MX6_PAD_EIM_D17__ECSPI1_MISO | MUX_PAD_CTRL(SPI_PAD_CTRL),
+	MX6_PAD_EIM_D18__ECSPI1_MOSI | MUX_PAD_CTRL(SPI_PAD_CTRL),
+	MX6_PAD_EIM_D19__GPIO3_IO19 | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
 #define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
 struct i2c_pads_info i2c_pad_info1 = {
 	.scl = {
@@ -381,6 +392,14 @@ static void setup_iomux_uart(void)
 	imx_iomux_v3_setup_multiple_pads(uart2_pads, ARRAY_SIZE(uart2_pads));
 }
 
+#ifdef CONFIG_MXC_SPI
+static void setup_spi(void)
+{
+	imx_iomux_v3_setup_multiple_pads(ecspi1_pads, ARRAY_SIZE(ecspi1_pads));
+	gpio_direction_output(IMX_GPIO_NR(3, 19), 0);
+}
+#endif
+
 #ifdef CONFIG_FSL_ESDHC
 static struct fsl_esdhc_cfg usdhc_cfg[] = {
 	{USDHC2_BASE_ADDR},
@@ -647,6 +666,9 @@ int board_early_init_f(void)
 	setup_iomux_uart();
 	setup_display();
 
+#ifdef CONFIG_MXC_SPI
+	setup_spi();
+#endif
 	return 0;
 }
 
@@ -671,6 +693,13 @@ int checkboard(void)
 	return 0;
 }
 
+#ifdef CONFIG_MXC_SPI
+int board_spi_cs_gpio(unsigned bus, unsigned cs)
+{
+	return (bus == 0 && cs == 0) ? (IMX_GPIO_NR(3, 19)) : -EINVAL;
+}
+#endif
+
 #ifdef CONFIG_CMD_BMODE
 static const struct boot_mode board_boot_modes[] = {
 	/* 4 bit bus width */

include/configs/cgtqmx6eval.h

@@ -29,6 +29,16 @@
 /* MMC Configs */
 #define CONFIG_SYS_FSL_ESDHC_ADDR      0
 
+/* SPI NOR */
+#define CONFIG_CMD_SF
+#define CONFIG_SPI_FLASH
+#define CONFIG_SPI_FLASH_STMICRO
+#define CONFIG_SPI_FLASH_SST
+#define CONFIG_MXC_SPI
+#define CONFIG_SF_DEFAULT_BUS		0
+#define CONFIG_SF_DEFAULT_SPEED		20000000
+#define CONFIG_SF_DEFAULT_MODE		(SPI_MODE_0)
+
 /* Miscellaneous commands */
 #define CONFIG_CMD_BMODE
 
@@ -200,8 +210,10 @@
 		"else " \
 			"bootz; " \
 		"fi;\0" \
+	"spilock=sf probe && sf protect lock 0x3f0000 0x10000;"\
 
 #define CONFIG_BOOTCOMMAND \
+	"run spilock;"	    \
 	"mmc dev ${mmcdev};" \
 	"if mmc rescan; then " \
 		"if run loadbootscript; then " \