CCMC_EPDC_PIX
reg = bus_space_read_4(iot, ioh, CCMC_EPDC_PIX);
bus_space_write_4(iot, ioh, CCMC_EPDC_PIX, reg);
reg = bus_space_read_4(iot, ioh, CCMC_EPDC_PIX);
bus_space_write_4(iot, ioh, CCMC_EPDC_PIX, reg);