diff options
| -rw-r--r-- | include/libfdt.h | 21 | ||||
| -rw-r--r-- | lib/libfdt/fdt_wip.c | 29 |
2 files changed, 46 insertions, 4 deletions
diff --git a/include/libfdt.h b/include/libfdt.h index a55d2d0..4c56711c 100644 --- a/include/libfdt.h +++ b/include/libfdt.h @@ -1054,6 +1054,27 @@ int fdt_size_cells(const void *fdt, int nodeoffset); /**********************************************************************/ /** + * fdt_setprop_inplace_namelen_partial - change a property's value, + * but not its size + * @fdt: pointer to the device tree blob + * @nodeoffset: offset of the node whose property to change + * @name: name of the property to change + * @namelen: number of characters of name to consider + * @index: index of the property to change in the array + * @val: pointer to data to replace the property value with + * @len: length of the property value + * + * Identical to fdt_setprop_inplace(), but modifies the given property + * starting from the given index, and using only the first characters + * of the name. It is useful when you want to manipulate only one value of + * an array and you have a string that doesn't end with \0. + */ +int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset, + const char *name, int namelen, + uint32_t index, const void *val, + int len); + +/** * fdt_setprop_inplace - change a property's value, but not its size * @fdt: pointer to the device tree blob * @nodeoffset: offset of the node whose property to change diff --git a/lib/libfdt/fdt_wip.c b/lib/libfdt/fdt_wip.c index 9fe9886..216c512 100644 --- a/lib/libfdt/fdt_wip.c +++ b/lib/libfdt/fdt_wip.c @@ -14,21 +14,42 @@ #include "libfdt_internal.h" +int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset, + const char *name, int namelen, + uint32_t index, const void *val, + int len) +{ + void *propval; + int proplen; + + propval = fdt_getprop_namelen_w(fdt, nodeoffset, name, namelen, + &proplen); + if (!propval) + return proplen; + + if (proplen < (len + index)) + return -FDT_ERR_NOSPACE; + + memcpy(propval + index, val, len); + return 0; +} + int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name, const void *val, int len) { - void *propval; + const void *propval; int proplen; - propval = fdt_getprop_w(fdt, nodeoffset, name, &proplen); + propval = fdt_getprop(fdt, nodeoffset, name, &proplen); if (!propval) return proplen; if (proplen != len) return -FDT_ERR_NOSPACE; - memcpy(propval, val, len); - return 0; + return fdt_setprop_inplace_namelen_partial(fdt, nodeoffset, name, + strlen(name), 0, + val, len); } static void _fdt_nop_region(void *start, int len) |