diff options
| -rw-r--r-- | include/libfdt.h | 16 | ||||
| -rw-r--r-- | lib/libfdt/fdt_sw.c | 16 |
2 files changed, 30 insertions, 2 deletions
diff --git a/include/libfdt.h b/include/libfdt.h index e48c21aced0..74b1d149c2d 100644 --- a/include/libfdt.h +++ b/include/libfdt.h @@ -1181,6 +1181,22 @@ static inline int fdt_property_cell(void *fdt, const char *name, uint32_t val) { return fdt_property_u32(fdt, name, val); } + +/** + * fdt_property_placeholder - add a new property and return a ptr to its value + * + * @fdt: pointer to the device tree blob + * @name: name of property to add + * @len: length of property value in bytes + * @valp: returns a pointer to where where the value should be placed + * + * returns: + * 0, on success + * -FDT_ERR_BADMAGIC, + * -FDT_ERR_NOSPACE, standard meanings + */ +int fdt_property_placeholder(void *fdt, const char *name, int len, void **valp); + #define fdt_property_string(fdt, name, str) \ fdt_property(fdt, name, str, strlen(str)+1) int fdt_end_node(void *fdt); diff --git a/lib/libfdt/fdt_sw.c b/lib/libfdt/fdt_sw.c index 320a914991a..345a3acbf8e 100644 --- a/lib/libfdt/fdt_sw.c +++ b/lib/libfdt/fdt_sw.c @@ -175,7 +175,7 @@ static int _fdt_find_add_string(void *fdt, const char *s) return offset; } -int fdt_property(void *fdt, const char *name, const void *val, int len) +int fdt_property_placeholder(void *fdt, const char *name, int len, void **valp) { struct fdt_property *prop; int nameoff; @@ -193,7 +193,19 @@ int fdt_property(void *fdt, const char *name, const void *val, int len) prop->tag = cpu_to_fdt32(FDT_PROP); prop->nameoff = cpu_to_fdt32(nameoff); prop->len = cpu_to_fdt32(len); - memcpy(prop->data, val, len); + *valp = prop->data; + return 0; +} + +int fdt_property(void *fdt, const char *name, const void *val, int len) +{ + void *ptr; + int ret; + + ret = fdt_property_placeholder(fdt, name, len, &ptr); + if (ret) + return ret; + memcpy(ptr, val, len); return 0; } |