SPL:SPI: Add Falcon Mode support

Signed-off-by: Tom Rini <trini@ti.com>

drivers/mtd/spi/spi_spl_load.c

@@ -13,6 +13,35 @@
 #include <spi_flash.h>
 #include <spl.h>
 
+#ifdef CONFIG_SPL_OS_BOOT
+/*
+ * Load the kernel, check for a valid header we can parse, and if found load
+ * the kernel and then device tree.
+ */
+static int spi_load_image_os(struct spi_flash *flash,
+			     struct image_header *header)
+{
+	/* Read for a header, parse or error out. */
+	spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS, 0x40,
+		       (void *)header);
+
+	if (image_get_magic(header) != IH_MAGIC)
+		return -1;
+
+	spl_parse_image_header(header);
+
+	spi_flash_read(flash, CONFIG_SYS_SPI_KERNEL_OFFS,
+		       spl_image.size, (void *)spl_image.load_addr);
+
+	/* Read device tree. */
+	spi_flash_read(flash, CONFIG_SYS_SPI_ARGS_OFFS,
+		       CONFIG_SYS_SPI_ARGS_SIZE,
+		       (void *)CONFIG_SYS_SPL_ARGS_ADDR);
+
+	return 0;
+}
+#endif
+
 /*
  * The main entry for SPI booting. It's necessary that SDRAM is already
  * configured and available since this code loads the main U-Boot image
@@ -37,10 +66,15 @@ void spl_spi_load_image(void)
 	/* use CONFIG_SYS_TEXT_BASE as temporary storage area */
 	header = (struct image_header *)(CONFIG_SYS_TEXT_BASE);
 
+#ifdef CONFIG_SPL_OS_BOOT
+	if (spl_start_uboot() || spi_load_image_os(flash, header))
+#endif
+	{
 		/* Load u-boot, mkimage header is 64 bytes. */
 		spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS, 0x40,
 			       (void *)header);
 		spl_parse_image_header(header);
 		spi_flash_read(flash, CONFIG_SYS_SPI_U_BOOT_OFFS,
 			       spl_image.size, (void *)spl_image.load_addr);
+	}
 }