diff options
Diffstat (limited to 'include/linux/of_address.h')
-rw-r--r-- | include/linux/of_address.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/of_address.h b/include/linux/of_address.h index 1d005439f026..5292f62c1baa 100644 --- a/include/linux/of_address.h +++ b/include/linux/of_address.h @@ -35,6 +35,22 @@ struct of_pci_range { for (; of_pci_range_parser_one(parser, range);) #define for_each_of_range for_each_of_pci_range +/* + * of_range_count - Get the number of "ranges" or "dma-ranges" entries + * @parser: Parser state initialized by of_range_parser_init() + * + * Returns the number of entries or 0 if none. + * + * Note that calling this within or after the for_each_of_range() iterator will + * be inaccurate giving the number of entries remaining. + */ +static inline int of_range_count(const struct of_range_parser *parser) +{ + if (!parser || !parser->node || !parser->range || parser->range == parser->end) + return 0; + return (parser->end - parser->range) / (parser->na + parser->pna + parser->ns); +} + /* Translate a DMA address from device space to CPU space */ extern u64 of_translate_dma_address(struct device_node *dev, const __be32 *in_addr); |