cmd: fdt: add fdt overlay application subcommand
[u-boot.git] / cmd / fdt.c
index 0f5923e..58af772 100644 (file)
--- a/cmd/fdt.c
+++ b/cmd/fdt.c
@@ -639,6 +639,27 @@ static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 #endif
 
        }
+#ifdef CONFIG_OF_LIBFDT_OVERLAY
+       /* apply an overlay */
+       else if (strncmp(argv[1], "ap", 2) == 0) {
+               unsigned long addr;
+               struct fdt_header *blob;
+
+               if (argc != 3)
+                       return CMD_RET_USAGE;
+
+               if (!working_fdt)
+                       return CMD_RET_FAILURE;
+
+               addr = simple_strtoul(argv[2], NULL, 16);
+               blob = map_sysmem(addr, 0);
+               if (!fdt_valid(&blob))
+                       return CMD_RET_FAILURE;
+
+               if (fdt_overlay_apply(working_fdt, blob))
+                       return CMD_RET_FAILURE;
+       }
+#endif
        /* resize the fdt */
        else if (strncmp(argv[1], "re", 2) == 0) {
                fdt_shrink_to_minimum(working_fdt);
@@ -1025,6 +1046,9 @@ static int fdt_print(const char *pathp, char *prop, int depth)
 #ifdef CONFIG_SYS_LONGHELP
 static char fdt_help_text[] =
        "addr [-c]  <addr> [<length>]   - Set the [control] fdt location to <addr>\n"
+#ifdef CONFIG_OF_LIBFDT_OVERLAY
+       "fdt apply <addr>                    - Apply overlay to the DT\n"
+#endif
 #ifdef CONFIG_OF_BOARD_SETUP
        "fdt boardsetup                      - Do board-specific set up\n"
 #endif