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| author | Grant Likely <grant.likely@secretlab.ca> | 2011-07-05 23:42:28 -0600 |
|---|---|---|
| committer | Grant Likely <grant.likely@secretlab.ca> | 2011-07-18 16:32:26 -0600 |
| commit | 90e33f62e027d330485d03598e1b2d8db3ff031c (patch) | |
| tree | 8dea43baa65a88ba28771a945f126a511024f804 /drivers/of/address.c | |
| parent | 8c11642a50555e584774737f7c296f9aece310cf (diff) | |
| download | lwn-90e33f62e027d330485d03598e1b2d8db3ff031c.tar.gz lwn-90e33f62e027d330485d03598e1b2d8db3ff031c.zip | |
of/address: Add of_find_matching_node_by_address helper
of_find_matching_node_by_address() can be used to find a device tree
node for a device at a specific address.
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/of/address.c')
| -rw-r--r-- | drivers/of/address.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c index b4559c58c095..da1f4b9605df 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -577,6 +577,24 @@ int of_address_to_resource(struct device_node *dev, int index, } EXPORT_SYMBOL_GPL(of_address_to_resource); +struct device_node *of_find_matching_node_by_address(struct device_node *from, + const struct of_device_id *matches, + u64 base_address) +{ + struct device_node *dn = of_find_matching_node(from, matches); + struct resource res; + + while (dn) { + if (of_address_to_resource(dn, 0, &res)) + continue; + if (res.start == base_address) + return dn; + dn = of_find_matching_node(dn, matches); + } + + return NULL; +} + /** * of_iomap - Maps the memory mapped IO for a given device_node |