Commit d744a0cb authored May 05, 2015 by Olli Salonen Committed by Mauro Carvalho Chehab May 12, 2015

[media] rtl28xxu: add I2C read without write



Add support for I2C read operation without a preceeding write.

While here, change the error code to EOPNOTSUPP in case an
unsupported I2C operation is attempted.

Signed-off-by: Olli Salonen <olli.salonen@iki.fi>
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

parent ee3c3e46

drivers/media/usb/dvb-usb-v2/rtl28xxu.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -232,8 +232,14 @@ static int rtl28xxu_i2c_xfer(struct i2c_adapter *adap, struct i2c_msg msg[],
		req.data = msg[0].buf;
		ret = rtl28xxu_ctrl_msg(d, &req);
		}
		} else if (num == 1 && (msg[0].flags & I2C_M_RD)) {
		req.value = (msg[0].addr << 1);
		req.index = CMD_I2C_DA_RD;
		req.size = msg[0].len;
		req.data = msg[0].buf;
		ret = rtl28xxu_ctrl_msg(d, &req);
		} else {
		ret = -EINVAL;
		ret = -EOPNOTSUPP;
		}

		err_mutex_unlock: