From 4bb7075c830c6f4e4512fe0277ff1f08c5a9e084 Mon Sep 17 00:00:00 2001 From: Dario Binacchi Date: Sun, 29 Mar 2020 18:04:41 +0200 Subject: dm: core: support reading a single indexed u32 value The patch adds helper functions to allow reading a single indexed u32 value from a device-tree property containing multiple u32 values, that is an array of integers. Signed-off-by: Dario Binacchi Reviewed-by: Simon Glass --- include/dm/ofnode.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'include/dm/ofnode.h') diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h index b5a50e88499..ce5e366c062 100644 --- a/include/dm/ofnode.h +++ b/include/dm/ofnode.h @@ -202,6 +202,18 @@ static inline ofnode ofnode_null(void) */ int ofnode_read_u32(ofnode node, const char *propname, u32 *outp); +/** + * ofnode_read_u32_index() - Read a 32-bit integer from a multi-value property + * + * @ref: valid node reference to read property from + * @propname: name of the property to read from + * @index: index of the integer to return + * @outp: place to put value (if found) + * @return 0 if OK, -ve on error + */ +int ofnode_read_u32_index(ofnode node, const char *propname, int index, + u32 *outp); + /** * ofnode_read_s32() - Read a 32-bit integer from a property * @@ -226,6 +238,19 @@ static inline int ofnode_read_s32(ofnode node, const char *propname, */ u32 ofnode_read_u32_default(ofnode ref, const char *propname, u32 def); +/** + * ofnode_read_u32_index_default() - Read a 32-bit integer from a multi-value + * property + * + * @ref: valid node reference to read property from + * @propname: name of the property to read from + * @index: index of the integer to return + * @def: default value to return if the property has no value + * @return property value, or @def if not found + */ +u32 ofnode_read_u32_index_default(ofnode ref, const char *propname, int index, + u32 def); + /** * ofnode_read_s32_default() - Read a 32-bit integer from a property * -- cgit v1.2.3