-INLINE void i2c_start_r(I2c *i2c, uint16_t slave_addr, size_t size, int flags)
+/*
+ * Low level i2c init implementation prototype.
+ */
+void i2c_hw_init(I2c *i2c, int dev, uint32_t clock);
+void i2c_hw_bitbangInit(I2c *i2c, int dev);
+
+void i2c_genericWrite(I2c *i2c, const void *_buf, size_t count);
+void i2c_genericRead(I2c *i2c, void *_buf, size_t count);
+
+INLINE void i2c_start(I2c *i2c, uint16_t slave_addr, size_t size)