STATE_WAIT
cps_driver.state_count = STATE_WAIT + 1;
case STATE_WAIT:
[STATE_WAIT] = MIPS_CPUIDLE_WAIT_STATE,
touch->state = STATE_WAIT;
case STATE_WAIT:
i2c->state = STATE_WAIT;
i2c->state != STATE_WAIT,
i2c->state = STATE_WAIT;