drivers: mdio: stm32: don't mix HAL return value and errno

Correct mdio_stm32_read() and mdio_stm32_write() to return a valid errno
instead of mixing HAL return values and errno return values.

Signed-off-by: Etienne Carriere <[email protected]>

Author: etienne-lms

drivers/mdio/mdio_stm32_hal.c

@@ -38,8 +38,8 @@ static int mdio_stm32_read(const struct device *dev, uint8_t prtad,
 {
 	struct mdio_stm32_data *const dev_data = dev->data;
 	ETH_HandleTypeDef *heth = &dev_data->heth;
+	HAL_StatusTypeDef ret;
 	uint32_t read;
-	int ret;
 
 	k_sem_take(&dev_data->sem, K_FOREVER);
 
@@ -59,15 +59,15 @@ static int mdio_stm32_read(const struct device *dev, uint8_t prtad,
 
 	*data = read & ADIN1100_REG_VALUE_MASK;
 
-	return ret;
+	return 0;
 }
 
 static int mdio_stm32_write(const struct device *dev, uint8_t prtad,
 			    uint8_t regad, uint16_t data)
 {
 	struct mdio_stm32_data *const dev_data = dev->data;
 	ETH_HandleTypeDef *heth = &dev_data->heth;
-	int ret;
+	HAL_StatusTypeDef ret;
 
 	k_sem_take(&dev_data->sem, K_FOREVER);
 
@@ -85,7 +85,7 @@ static int mdio_stm32_write(const struct device *dev, uint8_t prtad,
 		return -EIO;
 	}
 
-	return ret;
+	return 0;
 }
 
 #ifdef CONFIG_ETH_STM32_HAL_API_V1