@@ -73,6 +73,40 @@ static int fdt_value_env_set(const void *nodep, int len, const char *var)
return 0;
}
+static const char * const fdt_member_table[] = {
+ "magic",
+ "totalsize",
+ "off_dt_struct",
+ "off_dt_strings",
+ "off_mem_rsvmap",
+ "version",
+ "last_comp_version",
+ "boot_cpuid_phys",
+ "size_dt_strings",
+ "size_dt_struct",
+};
+
+static int fdt_get_header_value(int argc, char * const argv[])
+{
+ fdt32_t *fdtp = (fdt32_t *)working_fdt;
+ ulong val;
+ int i;
+
+ if (argv[2][0] != 'g')
+ return CMD_RET_FAILURE;
+
+ for (i = 0; i < ARRAY_SIZE(fdt_member_table); i++) {
+ if (strcmp(fdt_member_table[i], argv[4]))
+ continue;
+
+ val = fdt32_to_cpu(fdtp[i]);
+ env_set_hex(argv[3], val);
+ return CMD_RET_SUCCESS;
+ }
+
+ return CMD_RET_FAILURE;
+}
+
/*
* Flattened Device Tree command, see the help for parameter definitions.
*/
@@ -491,6 +525,9 @@ static int do_fdt(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
* Display header info
*/
} else if (argv[1][0] == 'h') {
+ if (argc == 5)
+ return fdt_get_header_value(argc, argv);
+
u32 version = fdt_version(working_fdt);
printf("magic:\t\t\t0x%x\n", fdt_magic(working_fdt));
printf("totalsize:\t\t0x%x (%d)\n", fdt_totalsize(working_fdt),
@@ -1090,7 +1127,8 @@ static char fdt_help_text[] =
"fdt set <path> <prop> [<val>] - Set <property> [to <val>]\n"
"fdt mknode <path> <node> - Create a new node after <path>\n"
"fdt rm <path> [<prop>] - Delete the node or <property>\n"
- "fdt header - Display header info\n"
+ "fdt header [get <var> <member>] - Display header info\n"
+ " get - get header member <member> and store it in <var>\n"
"fdt bootcpu <id> - Set boot cpuid\n"
"fdt memory <addr> <size> - Add/Update memory node\n"
"fdt rsvmem print - Show current mem reserves\n"
store fdt header member with name <member> in U-Boot Environment variable with name <var>. for example to get the total length of the fdt and store it in filesize, call: fdt header get filesize totalsize For membernames look into fdt header definition at scripts/dtc/libfdt/libfdt.h Signed-off-by: Heiko Schocher <hs@denx.de> --- Changes in v3: - add comments from Marek simplify for loop, use fdtp[i] -> drop ftdip++ Changes in v2: - add obviously missing "static const char *" cmd/fdt.c | 40 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 39 insertions(+), 1 deletion(-)