XENON_EMMC_PHY_TIMING_ADJUST
reg = bus_read_4(sc->mem_res, XENON_EMMC_PHY_TIMING_ADJUST);
bus_write_4(sc->mem_res, XENON_EMMC_PHY_TIMING_ADJUST, reg);
reg = bus_read_4(sc->mem_res, XENON_EMMC_PHY_TIMING_ADJUST);
bus_write_4(sc->mem_res, XENON_EMMC_PHY_TIMING_ADJUST, reg);
reg = bus_read_4(sc->mem_res, XENON_EMMC_PHY_TIMING_ADJUST);
reg = bus_read_4(sc->mem_res, XENON_EMMC_PHY_TIMING_ADJUST);
bus_write_4(sc->mem_res, XENON_EMMC_PHY_TIMING_ADJUST, reg);