[U-Boot] [PATCH] fdt: Pass the board serial number through devicetree

[Paul Kocialkowski]

Signed-off-by: Paul Kocialkowski <contact at paulk.fr>
---
 common/fdt_support.c  | 25 +++++++++++++++++++++++++
 common/image-fdt.c    |  4 ++++
 include/fdt_support.h |  1 +
 3 files changed, 30 insertions(+)

diff --git a/common/fdt_support.c b/common/fdt_support.c
index 8266bca..a97b4f0 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -194,6 +194,31 @@ static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
 		return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
 }
 
+int fdt_root(void *fdt)
+{
+	char *serial;
+	int err;
+
+	err = fdt_check_header(fdt);
+	if (err < 0) {
+		printf("fdt_root: %s\n", fdt_strerror(err));
+		return err;
+	}
+
+	serial = getenv("serial#");
+	if (serial) {
+		err = fdt_setprop(fdt, 0, "serial-number", serial,
+				  strlen(serial) + 1);
+
+		if (err < 0) {
+			printf("WARNING: could not set serial-number %s.\n",
+			       fdt_strerror(err));
+			return err;
+		}
+	}
+
+	return 0;
+}
 
 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
 {
diff --git a/common/image-fdt.c b/common/image-fdt.c
index d9e4728..1600561 100644
--- a/common/image-fdt.c
+++ b/common/image-fdt.c
@@ -470,6 +470,10 @@ int image_setup_libfdt(bootm_headers_t *images, void *blob,
 	int ret = -EPERM;
 	int fdt_ret;
 
+	if (fdt_root(blob) < 0) {
+		printf("ERROR: root node setup failed\n");
+		goto err;
+	}
 	if (fdt_chosen(blob) < 0) {
 		printf("ERROR: /chosen node create failed\n");
 		goto err;
diff --git a/include/fdt_support.h b/include/fdt_support.h
index ae5e8a3..8eb5968 100644
--- a/include/fdt_support.h
+++ b/include/fdt_support.h
@@ -16,6 +16,7 @@ u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
 				const char *prop, const u32 dflt);
 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
 				const char *prop, const u32 dflt);
+int fdt_root(void *fdt);
 int fdt_chosen(void *fdt);
 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end);
 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
-- 
1.9.1