fdt: Allow non-FDT kernels to boot when CONFIG_OF_LIBFDT is defined

The boot commands - bootz/bootm mandate a third argument which is the
address to the FDT blob. In cases where this argument is not specified,
boot fails with a message indicating a missing FDT.

This causes non-FDT kernels to fail to boot. This patch allows both FDT
and non-FDT kernels to boot by making the third parameter to the bootm/bootz
optional.

Signed-off-by: Suriyan Ramasami <suriyan.r@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
[trini: Update again for covering appended DTB case after last revert in
this area]
Signed-off-by: Tom Rini <trini@ti.com>

diff --git a/common/image-fdt.c b/common/image-fdt.c
index 8db3ccb4e7404b5b1f4f0bfca22998414157e0bc..e3f06cdd1a28406e8a1a2613d543b71c27d44942 100644 (file)
--- a/common/image-fdt.c
+++ b/common/image-fdt.c
@@ -237,6 +237,7 @@ int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
        int             fdt_noffset;
 #endif
        const char *select = NULL;
+       int             ok_no_fdt = 0;
 
        *of_flat_tree = NULL;
        *of_size = 0;
@@ -309,7 +310,7 @@ int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
                               fdt_addr);
                        fdt_hdr = image_get_fdt(fdt_addr);
                        if (!fdt_hdr)
-                               goto error;
+                               goto no_fdt;
 
                        /*
                         * move image data to the load address,
@@ -379,7 +380,7 @@ int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
                        break;
                default:
                        puts("ERROR: Did not find a cmdline Flattened Device Tree\n");
-                       goto error;
+                       goto no_fdt;
                }
 
                printf("   Booting using the fdt blob at %#08lx\n", fdt_addr);
@@ -413,11 +414,11 @@ int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
                        }
                } else {
                        debug("## No Flattened Device Tree\n");
-                       return 0;
+                       goto no_fdt;
                }
        } else {
                debug("## No Flattened Device Tree\n");
-               return 0;
+               goto no_fdt;
        }
 
        *of_flat_tree = fdt_blob;
@@ -427,9 +428,15 @@ int boot_get_fdt(int flag, int argc, char * const argv[], uint8_t arch,
 
        return 0;
 
+no_fdt:
+       ok_no_fdt = 1;
 error:
        *of_flat_tree = NULL;
        *of_size = 0;
+       if (!select && ok_no_fdt) {
+               debug("Continuing to boot without FDT\n");
+               return 0;
+       }
        return 1;
 }