fdt: Enable selecting correct DTB from appended FIT Image

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@ti.com>
Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>

diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 91503b8cb922010829e0679544929f66a937213b..fbb48bf74d9950fd8338af64af1bcd5a9218ae66 100644 (file)
--- 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>
@@ -1221,6 +1222,15 @@ 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;