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| author |   Jeremy Kerr <jeremy.kerr@canonical.com> | 2010-02-01 21:34:11 -0700 |
|---|---|---|
| committer |   Grant Likely <grant.likely@secretlab.ca> | 2010-02-09 08:32:48 -0700 |
| commit | 89751a7cb70a20f0d604dd7c4be29dd7b0011718 (patch) | |
| tree | 17abed1974c3c79c978b20bd396078df80f19f40 /drivers/of | |
| parent | of: merge of_attach_node() & of_detach_node() (diff) | |
| download | linux-dev-89751a7cb70a20f0d604dd7c4be29dd7b0011718.tar.xz linux-dev-89751a7cb70a20f0d604dd7c4be29dd7b0011718.zip | |
of: merge of_find_node_by_phandle
Merge common function between powerpc, sparc and microblaze. Code is
identical for powerpc and microblaze, but adds a lock (and release) of
the devtree_lock on sparc.
Signed-off-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/base.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index 2ce58be314af..785e9cc1b207 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -615,6 +615,27 @@ int of_modalias_node(struct device_node *node, char *modalias, int len) EXPORT_SYMBOL_GPL(of_modalias_node); /** + * of_find_node_by_phandle - Find a node given a phandle + * @handle: phandle of the node to find + * + * Returns a node pointer with refcount incremented, use + * of_node_put() on it when done. + */ +struct device_node *of_find_node_by_phandle(phandle handle) +{ + struct device_node *np; + + read_lock(&devtree_lock); + for (np = allnodes; np; np = np->allnext) + if (np->phandle == handle) + break; + of_node_get(np); + read_unlock(&devtree_lock); + return np; +} +EXPORT_SYMBOL(of_find_node_by_phandle); + +/** * of_parse_phandle - Resolve a phandle property to a device_node pointer * @np: Pointer to device node holding phandle property * @phandle_name: Name of property holding a phandle value |