diff options
Diffstat (limited to 'include/dm/of_addr.h')
| -rw-r--r-- | include/dm/of_addr.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/dm/of_addr.h b/include/dm/of_addr.h index 3fa1ffce81..ee21d5cf4f 100644 --- a/include/dm/of_addr.h +++ b/include/dm/of_addr.h @@ -44,6 +44,23 @@ u64 of_translate_address(const struct device_node *no, const __be32 *in_addr); */ u64 of_translate_dma_address(const struct device_node *no, const __be32 *in_addr); + +/** + * of_get_dma_range() - get dma-ranges for a specific DT node + * + * Get DMA ranges for a specifc node, this is useful to perform bus->cpu and + * cpu->bus address translations + * + * @param blob Pointer to device tree blob + * @param node_offset Node DT offset + * @param cpu Pointer to variable storing the range's cpu address + * @param bus Pointer to variable storing the range's bus address + * @param size Pointer to variable storing the range's size + * @return translated DMA address or OF_BAD_ADDR on error + */ +int of_get_dma_range(const struct device_node *dev, phys_addr_t *cpu, + dma_addr_t *bus, u64 *size); + /** * of_get_address() - obtain an address from a node * |