From 9a6cf73a88ddab2e1ac39088f2806177982cc62c Mon Sep 17 00:00:00 2001 From: David Gibson Date: Wed, 20 Aug 2008 16:55:14 +1000 Subject: libfdt: Add function to explicitly expand aliases Kumar has already added alias expansion to fdt_path_offset(). However, in some circumstances it may be convenient for the user of libfdt to explicitly get the string expansion of an alias. This patch adds a function to do this, fdt_get_alias(), and uses it to implement fdt_path_offset(). Signed-off-by: David Gibson --- include/libfdt.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'include/libfdt.h') diff --git a/include/libfdt.h b/include/libfdt.h index 5492a5352..7cad68c3c 100644 --- a/include/libfdt.h +++ b/include/libfdt.h @@ -458,6 +458,32 @@ static inline void *fdt_getprop_w(void *fdt, int nodeoffset, */ uint32_t fdt_get_phandle(const void *fdt, int nodeoffset); +/** + * fdt_get_namelen - get alias based on substring + * @fdt: pointer to the device tree blob + * @name: name of the alias th look up + * @namelen: number of characters of name to consider + * + * Identical to fdt_get_alias(), but only examine the first namelen + * characters of name for matching the alias name. + */ +const char *fdt_get_alias_namelen(const void *fdt, + const char *name, int namelen); + +/** + * fdt_get_alias - retreive the path referenced by a given alias + * @fdt: pointer to the device tree blob + * @name: name of the alias th look up + * + * fdt_get_alias() retrieves the value of a given alias. That is, the + * value of the property named 'name' in the node /aliases. + * + * returns: + * a pointer to the expansion of the alias named 'name', of it exists + * NULL, if the given alias or the /aliases node does not exist + */ +const char *fdt_get_alias(const void *fdt, const char *name); + /** * fdt_get_path - determine the full path of a node * @fdt: pointer to the device tree blob -- cgit v1.2.3