XENON_EMMC_PHY_PAD_CONTROL1
reg = bus_read_4(sc->mem_res, XENON_EMMC_PHY_PAD_CONTROL1);
bus_write_4(sc->mem_res, XENON_EMMC_PHY_PAD_CONTROL1, reg);
reg = bus_read_4(sc->mem_res, XENON_EMMC_PHY_PAD_CONTROL1);
bus_write_4(sc->mem_res, XENON_EMMC_PHY_PAD_CONTROL1, reg);