V4L/DVB (11374): v4l2-common: add v4l2_i2c_new_probed_subdev_addr

Add utility function to probe for a single address, rather than a list
of addresses.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/v4l2-common.c

@@ -864,6 +864,17 @@ error:
 }
 EXPORT_SYMBOL_GPL(v4l2_i2c_new_probed_subdev);
 
+struct v4l2_subdev *v4l2_i2c_new_probed_subdev_addr(struct v4l2_device *v4l2_dev,
+		struct i2c_adapter *adapter,
+		const char *module_name, const char *client_type, u8 addr)
+{
+	unsigned short addrs[2] = { addr, I2C_CLIENT_END };
+
+	return v4l2_i2c_new_probed_subdev(v4l2_dev, adapter,
+			module_name, client_type, addrs);
+}
+EXPORT_SYMBOL_GPL(v4l2_i2c_new_probed_subdev_addr);
+
 /* Return i2c client address of v4l2_subdev. */
 unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd)
 {

include/media/v4l2-common.h

@@ -147,6 +147,10 @@ struct v4l2_subdev *v4l2_i2c_new_subdev(struct i2c_adapter *adapter,
 struct v4l2_subdev *v4l2_i2c_new_probed_subdev(struct i2c_adapter *adapter,
 		const char *module_name, const char *client_type,
 		const unsigned short *addrs);
+/* Like v4l2_i2c_new_probed_subdev, except probe for a single address. */
+struct v4l2_subdev *v4l2_i2c_new_probed_subdev_addr(struct v4l2_device *v4l2_dev,
+		struct i2c_adapter *adapter,
+		const char *module_name, const char *client_type, u8 addr);
 /* Initialize an v4l2_subdev with data from an i2c_client struct */
 void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client,
 		const struct v4l2_subdev_ops *ops);