[PATCH v3 12/15] libfdt: Introduce fdt_getprop_offset_namelen()
From: Herve Codina <herve.codina@bootlin.com>
Date: 2026-08-26 08:33:05
Also in:
lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
Future operations, such as handling unknown tags on dtb modifications, need to get an offset to a property based on the node offset and the property name. Several function exists to get a property based on the node offset and the property name but none of them allows to get the property offset. Fill the lack and introduce fdt_getprop_offset_namelen() and its simple variant fdt_getprop_offset(). Signed-off-by: Herve Codina <herve.codina@bootlin.com> --- libfdt/fdt_ro.c | 13 +++++++++++++ libfdt/libfdt_internal.h | 8 ++++++++ 2 files changed, 21 insertions(+)
diff --git a/libfdt/fdt_ro.c b/libfdt/fdt_ro.c
index 856c62f1..50c0a8bc 100644
--- a/libfdt/fdt_ro.c
+++ b/libfdt/fdt_ro.c@@ -536,6 +536,19 @@ const void *fdt_getprop(const void *fdt, int nodeoffset, return fdt_getprop_namelen(fdt, nodeoffset, name, strlen(name), lenp); } +int fdt_getprop_offset_namelen(const void *fdt, int nodeoffset, + const char *name, int namelen) +{ + const struct fdt_property *prop; + int lenp, offset; + + prop = fdt_get_property_namelen_(fdt, nodeoffset, name, namelen, + &lenp, &offset); + if (!prop) + return lenp; + return offset; +} + uint32_t fdt_get_phandle(const void *fdt, int nodeoffset) { const fdt32_t *php;
diff --git a/libfdt/libfdt_internal.h b/libfdt/libfdt_internal.h
index 3c83d9a7..e3923629 100644
--- a/libfdt/libfdt_internal.h
+++ b/libfdt/libfdt_internal.h@@ -26,6 +26,14 @@ uint32_t fdt_next_tag_(const void *fdt, int startoffset, int *nextoffset, int fdt_check_node_offset_(const void *fdt, int offset); int fdt_check_prop_offset_(const void *fdt, int offset); +int fdt_getprop_offset_namelen(const void *fdt, int nodeoffset, + const char *name, int namelen); +static inline int fdt_getprop_offset(const void *fdt, int nodeoffset, + const char *name) +{ + return fdt_getprop_offset_namelen(fdt, nodeoffset, name, strlen(name)); +} + const char *fdt_find_string_len_(const char *strtab, int tabsize, const char *s, int s_len); static inline const char *fdt_find_string_(const char *strtab, int tabsize,
--
2.55.0