drivers/of: Add the of_find_i2c_device_by_node function.

[android-x86/kernel.git] / drivers / of / of_i2c.c

diff --git a/drivers/of/of_i2c.c b/drivers/of/of_i2c.c
index e1b0ad6..fa65a2b 100644 (file)
--- a/drivers/of/of_i2c.c
+++ b/drivers/of/of_i2c.c
@@ -66,4 +66,23 @@ void of_register_i2c_devices(struct i2c_adapter *adap,
 }
 EXPORT_SYMBOL(of_register_i2c_devices);
 
+static int of_dev_node_match(struct device *dev, void *data)
+{
+        return dev_archdata_get_node(&dev->archdata) == data;
+}
+
+/* must call put_device() when done with returned i2c_client device */
+struct i2c_client *of_find_i2c_device_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 to_i2c_client(dev);
+}
+EXPORT_SYMBOL(of_find_i2c_device_by_node);
+
 MODULE_LICENSE("GPL");