regulator: lp872x: Do not hardcode return values

Propagate the error values returned by the function instead.

Signed-off-by: Sachin Kamat <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

drivers/regulator/lp872x.c

···
 
 	ret = lp872x_read_byte(lp, LP872X_GENERAL_CFG, &val);
 	if (ret)
-		return -EINVAL;
+		return ret;
 
 	val = (val & mask) >> shift;
 	if (val >= size)
···
 	u8 addr, val;
 
 	if (time_step_us < 0)
-		return -EINVAL;
+		return time_step_us;
 
 	switch (rid) {
 	case LP8720_ID_LDO1 ... LP8720_ID_BUCK: