Implements the I2C function of Intel USB-I2C/GPIO/SPI adapter device
named "La Jolla Cove Adapter" (LJCA). It communicate with LJCA I2c
module with specific protocol through interfaces exported by LJCA
USB driver.
+/* I2C Transfer */
+struct i2c_xfer {
+ u8 id;
+ u8 slave;
+ u16 flag; /* speed, 8/16bit addr, addr increase, etc */
+ u16 addr;
+ u16 len;
+ u8 data[];
+} __packed;