i2c: designware: Fix the functionality flags of the slave-only interface

When an I2C adapter acts only as a slave, it should not claim to
support I2C master capabilities.

Fixes: 5b6d721 ("i2c: designware: enable SLAVE in platform module")
Signed-off-by: Jean Delvare <[email protected]>
Cc: Luis Oliveira <[email protected]>
Cc: Jarkko Nikula <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Mika Westerberg <[email protected]>
Cc: Jan Dabros <[email protected]>
Cc: Andi Shyti <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Acked-by: Jarkko Nikula <[email protected]>
Tested-by: Jarkko Nikula <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

Author: jdelvare

drivers/i2c/busses/i2c-designware-slave.c

@@ -220,7 +220,7 @@ static const struct i2c_algorithm i2c_dw_algo = {
 
 void i2c_dw_configure_slave(struct dw_i2c_dev *dev)
 {
-	dev->functionality = I2C_FUNC_SLAVE | DW_IC_DEFAULT_FUNCTIONALITY;
+	dev->functionality = I2C_FUNC_SLAVE;
 
 	dev->slave_cfg = DW_IC_CON_RX_FIFO_FULL_HLD_CTRL |
 			 DW_IC_CON_RESTART_EN | DW_IC_CON_STOP_DET_IFADDRESSED;