drivers: iio: temperature: Add delay after the addressed reset command in mlx90632.c

After an I2C reset command, the mlx90632 needs some time before
responding to other I2C commands. Without that delay, there is a chance
that the I2C command(s) after the reset will not be accepted.

Signed-off-by: Slaveyko Slaveykov <[email protected]>
Reviewed-by: Andy Shevchenko <[email protected]>
Reviewed-by: Crt Mori <[email protected]>
Fixes: e02472f ("iio:temperature:mlx90632: Adding extended calibration option")
Link: https://lore.kernel.org/r/[email protected]
Cc: <[email protected]>
Signed-off-by: Jonathan Cameron <[email protected]>

Author: slavysis

drivers/iio/temperature/mlx90632.c

@@ -248,6 +248,12 @@ static int mlx90632_set_meas_type(struct regmap *regmap, u8 type)
 	if (ret < 0)
 		return ret;
 
+	/*
+	 * Give the mlx90632 some time to reset properly before sending a new I2C command
+	 * if this is not done, the following I2C command(s) will not be accepted.
+	 */
+	usleep_range(150, 200);
+
 	ret = regmap_write_bits(regmap, MLX90632_REG_CONTROL,
 				 (MLX90632_CFG_MTYP_MASK | MLX90632_CFG_PWR_MASK),
 				 (MLX90632_MTYP_STATUS(type) | MLX90632_PWR_STATUS_HALT));