MACEKBC_CTRL
val = bus_space_read_8(iot, ioh, MACEKBC_CTRL);
bus_space_write_8(iot, ioh, MACEKBC_CTRL, val);
bus_space_write_8(iot, ioh, MACEKBC_CTRL, val);
ctrl = bus_space_read_8(iot, ioh, MACEKBC_CTRL);
bus_space_write_8(iot, ioh, MACEKBC_CTRL, 0);
bus_space_write_8(iot, ioh, MACEKBC_CTRL,
val = bus_space_read_8(iot, ioh, MACEKBC_CTRL);
bus_space_write_8(iot, ioh, MACEKBC_CTRL, val);
val = bus_space_read_8(iot, ioh, MACEKBC_CTRL);
bus_space_write_8(iot, ioh, MACEKBC_CTRL, val);