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authorGerald Van Baren <vanbaren@cideas.com>2007-12-29 22:45:27 -0500
committerGerald Van Baren <vanbaren@cideas.com>2008-01-08 15:03:29 -0500
commitb60af3d4c1680487ee37e11aa1b3db6dec04d8f0 (patch)
tree90774de37edeb49754e2f2a9fabbafd585132871 /common/fdt_support.c
parent238cb7a423c6eaa36496efb788cfb9798cea7f95 (diff)
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Fine grained per property /chosen updating.
Implement a suggestion by Scott Wood to make the /chosen handling fine grained. Don't overwrite pre-existing properties on a per-property basis, so if /chosen exists but a necessary /chosen/property doesn't, it gets created. If a /chosen property exists, it is NOT overwritten unless the "force" flag is true. Signed-off-by: Gerald Van Baren <vanbaren@cideas.com>
Diffstat (limited to 'common/fdt_support.c')
-rw-r--r--common/fdt_support.c73
1 files changed, 40 insertions, 33 deletions
diff --git a/common/fdt_support.c b/common/fdt_support.c
index b5ee6e9..92f1c7f 100644
--- a/common/fdt_support.c
+++ b/common/fdt_support.c
@@ -111,6 +111,7 @@ int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force)
int err;
u32 tmp; /* used to set 32 bit integer properties */
char *str; /* used to set string properties */
+ const char *path;
err = fdt_check_header(fdt);
if (err < 0) {
@@ -148,14 +149,7 @@ int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force)
nodeoffset = fdt_path_offset (fdt, "/chosen");
/*
- * If we have a "chosen" node already the "force the writing"
- * is not set, our job is done.
- */
- if ((nodeoffset >= 0) && !force)
- return 0;
-
- /*
- * No "chosen" node in the blob: create it.
+ * If there is no "chosen" node in the blob, create it.
*/
if (nodeoffset < 0) {
/*
@@ -170,42 +164,55 @@ int fdt_chosen(void *fdt, ulong initrd_start, ulong initrd_end, int force)
}
/*
- * Update pre-existing properties, create them if non-existant.
+ * Create /chosen properites that don't exist in the fdt.
+ * If the property exists, update it only if the "force" parameter
+ * is true.
*/
str = getenv("bootargs");
if (str != NULL) {
- err = fdt_setprop(fdt, nodeoffset,
- "bootargs", str, strlen(str)+1);
- if (err < 0)
- printf("WARNING: could not set bootargs %s.\n",
- fdt_strerror(err));
+ path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
+ if ((path == NULL) || force) {
+ err = fdt_setprop(fdt, nodeoffset,
+ "bootargs", str, strlen(str)+1);
+ if (err < 0)
+ printf("WARNING: could not set bootargs %s.\n",
+ fdt_strerror(err));
+ }
}
if (initrd_start && initrd_end) {
- tmp = __cpu_to_be32(initrd_start);
- err = fdt_setprop(fdt, nodeoffset,
- "linux,initrd-start", &tmp, sizeof(tmp));
- if (err < 0)
- printf("WARNING: "
- "could not set linux,initrd-start %s.\n",
- fdt_strerror(err));
- tmp = __cpu_to_be32(initrd_end);
- err = fdt_setprop(fdt, nodeoffset,
- "linux,initrd-end", &tmp, sizeof(tmp));
- if (err < 0)
- printf("WARNING: could not set linux,initrd-end %s.\n",
- fdt_strerror(err));
+ path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
+ if ((path == NULL) || force) {
+ tmp = __cpu_to_be32(initrd_start);
+ err = fdt_setprop(fdt, nodeoffset,
+ "linux,initrd-start", &tmp, sizeof(tmp));
+ if (err < 0)
+ printf("WARNING: "
+ "could not set linux,initrd-start %s.\n",
+ fdt_strerror(err));
+ tmp = __cpu_to_be32(initrd_end);
+ err = fdt_setprop(fdt, nodeoffset,
+ "linux,initrd-end", &tmp, sizeof(tmp));
+ if (err < 0)
+ printf("WARNING: could not set linux,initrd-end %s.\n",
+ fdt_strerror(err));
+ }
}
#ifdef CONFIG_OF_STDOUT_VIA_ALIAS
- err = fdt_fixup_stdout(fdt, nodeoffset);
+ path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
+ if ((path == NULL) || force)
+ err = fdt_fixup_stdout(fdt, nodeoffset);
#endif
#ifdef OF_STDOUT_PATH
- err = fdt_setprop(fdt, nodeoffset,
- "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
- if (err < 0)
- printf("WARNING: could not set linux,stdout-path %s.\n",
- fdt_strerror(err));
+ path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
+ if ((path == NULL) || force) {
+ err = fdt_setprop(fdt, nodeoffset,
+ "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
+ if (err < 0)
+ printf("WARNING: could not set linux,stdout-path %s.\n",
+ fdt_strerror(err));
+ }
#endif
return err;