[U-Boot] [PATCH v3 04/30] fdt: Enable selecting correct DTB from appended FIT Image

[Franklin S Cooper Jr]

This patch gives U-boot the runtime support to have the board specific
code decide which FDT to use. This is especially useful for devices
that need this type of runtime determination and also doesn't use SPL.

Signed-off-by: Franklin S Cooper Jr <fcooper at ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla at ti.com>
Reviewed-by: Tom Rini <trini at konsulko.com>
---
 lib/fdtdec.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index c072e54..8bd2940 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -4,6 +4,7 @@
  */
 
 #ifndef USE_HOSTCC
+#include <boot_fit.h>
 #include <common.h>
 #include <dm.h>
 #include <errno.h>
@@ -1251,6 +1252,15 @@ int fdtdec_setup(void)
 		gd->fdt_blob = (ulong *)&_image_binary_end;
 	else
 		gd->fdt_blob = (ulong *)&__bss_end;
+
+#  elif defined CONFIG_FIT_EMBED
+	gd->fdt_blob = locate_dtb_in_fit(&_end);
+
+	if (gd->fdt_blob == NULL || gd->fdt_blob <= ((void *)&_end)) {
+		puts("Failed to find proper dtb in embedded FIT Image\n");
+		return -1;
+	}
+
 #  else
 	/* FDT is at end of image */
 	gd->fdt_blob = (ulong *)&_end;
-- 
2.10.0