diff options
| author | Kumar Gala <galak@kernel.crashing.org> | 2008-10-23 00:05:47 -0500 |
|---|---|---|
| committer | Andrew Fleming-AFLEMING <afleming@freescale.com> | 2008-10-24 17:34:52 -0500 |
| commit | 3bed2aaf2d50fd13273c14d17d4fd40ef42e0d0f (patch) | |
| tree | 96ab5e57491f5aaacf45291f067aeb08f75937e6 | |
| parent | 8ba93f68a1bae89e033527ce67b41b4a87aa5b7f (diff) | |
fdt: Add fdt_getprop_u32_default helpers
Add helper functions to return find a node and return it's property
or a default value.
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Signed-off-by: Andrew Fleming-AFLEMING <afleming@freescale.com>
Acked-by: Gerald Van Baren <vanbaren@cideas.com>
| -rw-r--r-- | common/fdt_support.c | 27 | ||||
| -rw-r--r-- | include/fdt_support.h | 2 |
2 files changed, 29 insertions, 0 deletions
diff --git a/common/fdt_support.c b/common/fdt_support.c index 8ceeb0faa9d..f4307774dc9 100644 --- a/common/fdt_support.c +++ b/common/fdt_support.c @@ -35,6 +35,33 @@ */ DECLARE_GLOBAL_DATA_PTR; +/** + * fdt_getprop_u32_default - Find a node and return it's property or a default + * + * @fdt: ptr to device tree + * @path: path of node + * @prop: property name + * @dflt: default value if the property isn't found + * + * Convenience function to find a node and return it's property or a + * default value if it doesn't exist. + */ +u32 fdt_getprop_u32_default(void *fdt, const char *path, const char *prop, + const u32 dflt) +{ + const u32 *val; + int off; + + off = fdt_path_offset(fdt, path); + if (off < 0) + return dflt; + + val = fdt_getprop(fdt, off, prop, NULL); + if (val) + return *val; + else + return dflt; +} /** * fdt_find_and_setprop: Find a node and set it's property diff --git a/include/fdt_support.h b/include/fdt_support.h index ceaadc2bef7..816c9d08b90 100644 --- a/include/fdt_support.h +++ b/include/fdt_support.h @@ -28,6 +28,8 @@ #include <fdt.h> +u32 fdt_getprop_u32_default(void *fdt, const char *path, const char *prop, + const u32 dflt); int fdt_chosen(void *fdt, int force); int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force); void do_fixup_by_path(void *fdt, const char *path, const char *prop, |