[media] tvp5150: Use i2c_smbus_(read|write)_byte_data

X-Patchwork-Delegate: mchehab@redhat.com
Replace the custom I2C read/write implementation with SMBUS functions to
simplify the driver.
Signed-off-by: NLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

drivers/media/i2c/tvp5150.c

@@ -56,38 +56,29 @@ static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
 static int tvp5150_read(struct v4l2_subdev *sd, unsigned char addr)
 {
 	struct i2c_client *c = v4l2_get_subdevdata(sd);
-	unsigned char buffer[1];
 	int rc;
-	struct i2c_msg msg[] = {
-		{ .addr = c->addr, .flags = 0,
-		  .buf = &addr, .len = 1 },
-		{ .addr = c->addr, .flags = I2C_M_RD,
-		  .buf = buffer, .len = 1 }
-	};
-
-	rc = i2c_transfer(c->adapter, msg, 2);
-	if (rc < 0 || rc != 2) {
-		v4l2_err(sd, "i2c i/o error: rc == %d (should be 2)\n", rc);
-		return rc < 0 ? rc : -EIO;
+
+	rc = i2c_smbus_read_byte_data(c, addr);
+	if (rc < 0) {
+		v4l2_err(sd, "i2c i/o error: rc == %d\n", rc);
+		return rc;
 	}
 
-	v4l2_dbg(2, debug, sd, "tvp5150: read 0x%02x = 0x%02x\n", addr, buffer[0]);
+	v4l2_dbg(2, debug, sd, "tvp5150: read 0x%02x = 0x%02x\n", addr, rc);
 
-	return (buffer[0]);
+	return rc;
 }
 
 static inline void tvp5150_write(struct v4l2_subdev *sd, unsigned char addr,
 				 unsigned char value)
 {
 	struct i2c_client *c = v4l2_get_subdevdata(sd);
-	unsigned char buffer[2];
 	int rc;
 
-	buffer[0] = addr;
-	buffer[1] = value;
-	v4l2_dbg(2, debug, sd, "tvp5150: writing 0x%02x 0x%02x\n", buffer[0], buffer[1]);
-	if (2 != (rc = i2c_master_send(c, buffer, 2)))
-		v4l2_dbg(0, debug, sd, "i2c i/o error: rc == %d (should be 2)\n", rc);
+	v4l2_dbg(2, debug, sd, "tvp5150: writing 0x%02x 0x%02x\n", addr, value);
+	rc = i2c_smbus_write_byte_data(c, addr, value);
+	if (rc < 0)
+		v4l2_dbg(0, debug, sd, "i2c i/o error: rc == %d\n", rc);
 }
 
 static void dump_reg_range(struct v4l2_subdev *sd, char *s, u8 init,