mx6slevk: Add SPI NOR flash support

mx6slevk has a m25p32 SPI NOR flash connected to ESCSPI port.

Add support for it.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Marek Vasut <marex@denx.de>
Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>

arch/arm/include/asm/arch-mx6/mx6sl_pins.h

@@ -10,6 +10,10 @@
 #include <asm/imx-common/iomux-v3.h>
 
 enum {
+	MX6_PAD_ECSPI1_MISO__ECSPI_MISO				= IOMUX_PAD(0x0358, 0x0068, 0, 0x0684, 0, 0),
+	MX6_PAD_ECSPI1_MOSI__ECSPI_MOSI				= IOMUX_PAD(0x035C, 0x006C, 0, 0x0688, 0, 0),
+	MX6_PAD_ECSPI1_SCLK__ECSPI_SCLK				= IOMUX_PAD(0x0360, 0x0070, 0, 0x067C, 0, 0),
+	MX6_PAD_ECSPI1_SS0__GPIO4_IO11				= IOMUX_PAD(0x0364, 0x0074, 5, 0x0000, 0, 0),
 	MX6_PAD_SD2_CLK__USDHC2_CLK				= IOMUX_PAD(0x055C, 0x0254, 0, 0x0000, 0, 0),
 	MX6_PAD_SD2_CMD__USDHC2_CMD				= IOMUX_PAD(0x0560, 0x0258, 0, 0x0000, 0, 0),
 	MX6_PAD_SD2_DAT0__USDHC2_DAT0				= IOMUX_PAD(0x0564, 0x025C, 0, 0x0000, 0, 0),

board/freescale/mx6slevk/mx6slevk.c

@@ -34,6 +34,9 @@ DECLARE_GLOBAL_DATA_PTR;
 	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED   |             \
 	PAD_CTL_DSE_40ohm   | PAD_CTL_HYS)
 
+#define SPI_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_SPEED_MED | \
+		      PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST)
+
 #define ETH_PHY_RESET	IMX_GPIO_NR(4, 21)
 
 int dram_init(void)
@@ -71,6 +74,20 @@ static iomux_v3_cfg_t const fec_pads[] = {
 	MX6_PAD_FEC_TX_CLK__GPIO_4_21 | MUX_PAD_CTRL(NO_PAD_CTRL),
 };
 
+#ifdef CONFIG_MXC_SPI
+static iomux_v3_cfg_t ecspi1_pads[] = {
+	MX6_PAD_ECSPI1_MISO__ECSPI_MISO | MUX_PAD_CTRL(SPI_PAD_CTRL),
+	MX6_PAD_ECSPI1_MOSI__ECSPI_MOSI | MUX_PAD_CTRL(SPI_PAD_CTRL),
+	MX6_PAD_ECSPI1_SCLK__ECSPI_SCLK | MUX_PAD_CTRL(SPI_PAD_CTRL),
+	MX6_PAD_ECSPI1_SS0__GPIO4_IO11  | MUX_PAD_CTRL(NO_PAD_CTRL),
+};
+
+static void setup_spi(void)
+{
+	imx_iomux_v3_setup_multiple_pads(ecspi1_pads, ARRAY_SIZE(ecspi1_pads));
+}
+#endif
+
 static void setup_iomux_uart(void)
 {
 	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
@@ -132,6 +149,9 @@ static int setup_fec(void)
 int board_early_init_f(void)
 {
 	setup_iomux_uart();
+#ifdef CONFIG_MXC_SPI
+	setup_spi();
+#endif
 	return 0;
 }
 

include/configs/mx6slevk.h

@@ -10,6 +10,7 @@
 #define __CONFIG_H
 
 #include <asm/arch/imx-regs.h>
+#include <asm/imx-common/gpio.h>
 #include <linux/sizes.h>
 #include "mx6_common.h"
 
@@ -196,4 +197,15 @@
 #define CONFIG_CMD_CACHE
 #endif
 
+#define CONFIG_CMD_SF
+#ifdef CONFIG_CMD_SF
+#define CONFIG_SPI_FLASH
+#define CONFIG_SPI_FLASH_STMICRO
+#define CONFIG_MXC_SPI
+#define CONFIG_SF_DEFAULT_BUS		0
+#define CONFIG_SF_DEFAULT_CS		(0 | (IMX_GPIO_NR(4, 11) << 8))
+#define CONFIG_SF_DEFAULT_SPEED		20000000
+#define CONFIG_SF_DEFAULT_MODE		SPI_MODE_0
+#endif
+
 #endif				/* __CONFIG_H */