fix i2c reset bus function

Inc/i2c.h

@@ -39,7 +39,10 @@ typedef enum {
     I2C_RESULT_NACK,            /* No acknowledge received */
     I2C_RESULT_BUS_BUSY,        /* Bus is busy */
     I2C_RESULT_ERROR,           /* General error */
-    I2C_RESULT_INVALID_PARAM    /* Invalid parameter */
+    I2C_RESULT_INVALID_PARAM,   /* Invalid parameter */
+    I2C_RECOVERY_OK,
+    I2C_RECOVERY_SDA_STUCK_LOW,
+    I2C_RECOVERY_SCL_STUCK_LOW
 } i2c_result_t;
 
 /* I2C state machine enumeration */
@@ -69,24 +72,21 @@ typedef enum {
 
 
 /* Function declarations */
-
-// TODO I2C Result
 /*!
     \brief      configure the I2C interface
     \param[in]  none
     \param[out] none
     \retval     i2c_result_t
 */
-void i2c_config(void);
+i2c_result_t i2c_config(void);
 
-// TODO I2C Result
 /*!
     \brief      reset I2C bus with proper recovery
     \param[in]  none
     \param[out] none
     \retval     i2c_result_t
 */
-void i2c_bus_reset(void);
+i2c_result_t i2c_bus_reset(void);
 
 /*!
     \brief      scan I2C bus for devices