i2c: implement i2c_verify_adapter
This converts a struct device * to a struct i2c_adapter * while verifying
that the device really is an I2C adapter. Just like i2c_verify_client.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 195d8b3..b66cb60 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -232,6 +232,7 @@
#define to_i2c_client(d) container_of(d, struct i2c_client, dev)
extern struct i2c_client *i2c_verify_client(struct device *dev);
+extern struct i2c_adapter *i2c_verify_adapter(struct device *dev);
static inline struct i2c_client *kobj_to_i2c_client(struct kobject *kobj)
{