AS3722_GPIO_SIGNAL_OUT
rv = RM1(sc, AS3722_GPIO_SIGNAL_OUT, (1 << pin), (tmp << pin));
rv = RD1(sc, AS3722_GPIO_SIGNAL_OUT, &tmp);
rv = RD1(sc, AS3722_GPIO_SIGNAL_OUT, &tmp);
rv = RM1(sc, AS3722_GPIO_SIGNAL_OUT, (1 << pin), tmp);