arm: socfpga: spl: Add support for booting from QSPI

Add code and configuration options to support booting from QSPI NOR.
Enable support for booting from QSPI NOR.
Signed-off-by: NMarek Vasut <marex@denx.de>

arch/arm/mach-socfpga/spl.c

@@ -31,7 +31,10 @@ static struct nic301_registers *nic301_regs =
 
 u32 spl_boot_device(void)
 {
-#ifdef CONFIG_SPL_MMC_SUPPORT
+#ifdef CONFIG_SPL_SPI_SUPPORT
+	socfpga_per_reset(SOCFPGA_RESET(QSPI), 0);
+	return BOOT_DEVICE_SPI;
+#elif CONFIG_SPL_MMC_SUPPORT
 	socfpga_per_reset(SOCFPGA_RESET(SDMMC), 0);
 	socfpga_per_reset(SOCFPGA_RESET(DMA), 0);
 	return BOOT_DEVICE_MMC1;

configs/socfpga_arria5_defconfig

@@ -9,3 +9,8 @@ CONFIG_OF_CONTROL=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPL_DM=y
 CONFIG_SPL_MMC_SUPPORT=y
+CONFIG_DM_SEQ_ALIAS=y
+CONFIG_SPL_SIMPLE_BUS=y
+CONFIG_DM_SPI=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPL_SPI_SUPPORT=y

configs/socfpga_cyclone5_defconfig

@@ -11,3 +11,8 @@ CONFIG_NETDEVICES=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_SPL_DM=y
 CONFIG_SPL_MMC_SUPPORT=y
+CONFIG_DM_SEQ_ALIAS=y
+CONFIG_SPL_SIMPLE_BUS=y
+CONFIG_DM_SPI=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPL_SPI_SUPPORT=y

configs/socfpga_socrates_defconfig

@@ -11,3 +11,8 @@ CONFIG_NETDEVICES=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_SPL_DM=y
 CONFIG_SPL_MMC_SUPPORT=y
+CONFIG_DM_SEQ_ALIAS=y
+CONFIG_SPL_SIMPLE_BUS=y
+CONFIG_DM_SPI=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPL_SPI_SUPPORT=y

include/configs/socfpga_common.h

@@ -301,6 +301,7 @@ unsigned int cm_get_qspi_controller_clk_hz(void);
 #define CONFIG_SPL_WATCHDOG_SUPPORT
 #define CONFIG_SPL_SERIAL_SUPPORT
 #define CONFIG_SPL_MMC_SUPPORT
+#define CONFIG_SPL_SPI_SUPPORT
 
 /* SPL SDMMC boot support */
 #ifdef CONFIG_SPL_MMC_SUPPORT
@@ -315,6 +316,14 @@ unsigned int cm_get_qspi_controller_clk_hz(void);
 #endif
 #endif
 
+/* SPL QSPI boot support */
+#ifdef CONFIG_SPL_SPI_SUPPORT
+#define CONFIG_DM_SEQ_ALIAS		1
+#define CONFIG_SPL_SPI_FLASH_SUPPORT
+#define CONFIG_SPL_SPI_LOAD
+#define CONFIG_SYS_SPI_U_BOOT_OFFS	0x40000
+#endif
+
 /*
  * Stack setup
  */