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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2019-12-20 12:32:23 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2019-12-20 12:48:50 +0100 |
| commit | bd6705c7da22f5bf0443619f6f98637892515704 (patch) | |
| tree | e8db0455ad532fcf5a043aba4d119366b872f0f3 /include | |
| parent | d791e51e2db7a6ff12c4f0b191b7cdc57faefa0c (diff) | |
| download | barebox-bd6705c7da22f5bf0443619f6f98637892515704.tar.gz barebox-bd6705c7da22f5bf0443619f6f98637892515704.tar.xz | |
of: Read dma_offset from device tree
This reads the dma-ranges property from the device tree and sets
dma_offset in the devices accordingly. The code is mostly taken
from the Kernel as of v5.5-rc1. of_dma_configure() is trimmed down
to the cases we want to support currently.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/of_address.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/of_address.h b/include/of_address.h index ebf3ec2a24..350ecaec82 100644 --- a/include/of_address.h +++ b/include/of_address.h @@ -56,6 +56,9 @@ extern struct device_node *of_find_matching_node_by_address( u64 base_address); extern void __iomem *of_iomap(struct device_node *np, int index); +extern int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, + u64 *size); + #else /* CONFIG_OFTREE */ static inline u64 of_translate_address(struct device_node *dev, @@ -99,6 +102,12 @@ static inline void __iomem *of_iomap(struct device_node *np, int index) return NULL; } +static inline int of_dma_get_range(struct device_node *np, u64 *dma_addr, + u64 *paddr, u64 *size) +{ + return -ENOSYS; +} + #endif /* CONFIG_OFTREE */ #ifdef CONFIG_OF_PCI |