drivers: adc: ad7091: adding delays for conversion

During value conversion the communication might be blocked
in case the conversion is not yet finished and is still requested.
Adding extra delays between register sets and reads in order to
avoid these blockings.

Signed-off-by: rbudai98 <[email protected]>

Author: rbudai98

drivers/adc/ad7091r5/ad7091r5.c

@@ -57,7 +57,7 @@ int32_t ad7091r5_i2c_reg_read(struct ad7091r5_dev *dev,
 	if (!dev || !reg_data)
 		return -EINVAL;
 
-	ret = no_os_i2c_write(dev->i2c_desc, &reg_addr, 1, 1);
+	ret = no_os_i2c_write(dev->i2c_desc, &reg_addr, 1, 0);
 	if (ret < 0)
 		return ret;
 
@@ -144,6 +144,9 @@ int32_t ad7091r5_i2c_write_mask(struct ad7091r5_dev *dev,
 	reg_data &= ~mask;
 	reg_data |= data;
 
+	/* Allow time for register modification to take effect before write */
+	no_os_udelay(100);
+
 	return ad7091r5_i2c_reg_write(dev, reg_addr, reg_data);
 }
 
@@ -443,8 +446,8 @@ int32_t ad7091r5_reset(struct ad7091r5_dev *dev, bool is_software)
 		if (ret < 0)
 			return ret;
 
-		/* reset pulse width, at least 10 ns*/
-		no_os_udelay(1);
+		/* Reset pulse width extended to ensure proper device reset */
+		no_os_udelay(100);
 		return no_os_gpio_set_value(dev->gpio_resetn, NO_OS_GPIO_HIGH);
 	}
 }
@@ -499,6 +502,9 @@ int32_t ad7091r5_read_one(struct ad7091r5_dev *dev,
 	if (ret)
 		return ret;
 
+	/* Wait for channel switch and conversion to complete before reading result */
+	no_os_udelay(100);
+
 	ret = ad7091r5_i2c_reg_read(dev, AD7091R5_REG_RESULT, &val);
 	if (ret)
 		return ret;