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authorStephen Warren <swarren@nvidia.com>2012-04-17 20:43:34 +0200
committerWolfram Sang <w.sang@pengutronix.de>2012-05-12 14:28:17 +0200
commit0938643e533cc80ef0cdfdd2e260c4910d0f8bc7 (patch)
tree7c31d3251861eed8e799b73712e9bc006a9e6804 /drivers/of
parenti2c: implement i2c_verify_adapter (diff)
downloadlinux-0938643e533cc80ef0cdfdd2e260c4910d0f8bc7.tar.xz
linux-0938643e533cc80ef0cdfdd2e260c4910d0f8bc7.zip
of/i2c: implement of_find_i2c_adapter_by_node
This finds the struct i2c_adapter * for a given device tree node. Just like of_find_i2c_device_by_node. Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/of_i2c.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c
index 068488717f69..1e173f357674 100644
--- a/drivers/of/of_i2c.c
+++ b/drivers/of/of_i2c.c
@@ -94,4 +94,18 @@ struct i2c_client *of_find_i2c_device_by_node(struct device_node *node)
}
EXPORT_SYMBOL(of_find_i2c_device_by_node);
+/* must call put_device() when done with returned i2c_adapter device */
+struct i2c_adapter *of_find_i2c_adapter_by_node(struct device_node *node)
+{
+ struct device *dev;
+
+ dev = bus_find_device(&i2c_bus_type, NULL, node,
+ of_dev_node_match);
+ if (!dev)
+ return NULL;
+
+ return i2c_verify_adapter(dev);
+}
+EXPORT_SYMBOL(of_find_i2c_adapter_by_node);
+
MODULE_LICENSE("GPL");