diff options
| author | Grygorii Strashko <grygorii.strashko@ti.com> | 2014-04-24 19:30:02 +0400 |
|---|---|---|
| committer | Santosh Shilimkar <santosh.shilimkar@ti.com> | 2014-05-06 02:11:13 +0400 |
| commit | 18308c94723e162ed121942335bc186e66820a7a (patch) | |
| tree | 48ac9d3721d820bdace974332f3925cc5dc2c02b /include/linux/of_address.h | |
| parent | 8febcaa2aac184d7e729acb75e9c4b80b04ad1b9 (diff) | |
| download | linux-18308c94723e162ed121942335bc186e66820a7a.tar.xz | |
of: introduce of_dma_get_range() helper
The of_dma_get_range() allows to find "dma-range" property for
the specified device and parse it.
dma-ranges format:
DMA addr (dma_addr) : naddr cells
CPU addr (phys_addr_t) : pna cells
size : nsize cells
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Olof Johansson <olof@lixom.net>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Diffstat (limited to 'include/linux/of_address.h')
| -rw-r--r-- | include/linux/of_address.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/of_address.h b/include/linux/of_address.h index 5f6ed6b182b8..4d7b325af2ca 100644 --- a/include/linux/of_address.h +++ b/include/linux/of_address.h @@ -63,6 +63,8 @@ extern int of_pci_range_parser_init(struct of_pci_range_parser *parser, extern struct of_pci_range *of_pci_range_parser_one( struct of_pci_range_parser *parser, struct of_pci_range *range); +extern int of_dma_get_range(struct device_node *np, u64 *dma_addr, + u64 *paddr, u64 *size); #else /* CONFIG_OF_ADDRESS */ static inline struct device_node *of_find_matching_node_by_address( struct device_node *from, @@ -90,6 +92,12 @@ static inline struct of_pci_range *of_pci_range_parser_one( { return NULL; } + +static inline int of_dma_get_range(struct device_node *np, u64 *dma_addr, + u64 *paddr, u64 *size) +{ + return -ENODEV; +} #endif /* CONFIG_OF_ADDRESS */ #ifdef CONFIG_OF |