LCDC_LCSR
lscr = bus_space_read_4(iot, ioh, LCDC_LCSR);
status = bus_space_read_4(iot, ioh, LCDC_LCSR);
bus_space_write_4(iot, ioh, LCDC_LCSR, status);
bus_space_write_4(iot, ioh, LCDC_LCSR, 0);