OP_START
case OP_START: /* issue start and trigger DTE interrupt */
i2c_op(pd, OP_START);
cmd_addr = OP_START << edev->addrlen;
cmd_addr = OP_START << edev->addrlen;
#define OP_WRITE (OP_START | 0x1)
#define OP_READ (OP_START | 0x2)