MESON_AOBUS_PWR_CTRL0_REG
pwr_cntl0 = bus_space_read_4(bst, ao_bsh, MESON_AOBUS_PWR_CTRL0_REG);
bus_space_write_4(bst, ao_bsh, MESON_AOBUS_PWR_CTRL0_REG, pwr_cntl0);
pwr_cntl0 = bus_space_read_4(bst, ao_bsh, MESON_AOBUS_PWR_CTRL0_REG);
bus_space_write_4(bst, ao_bsh, MESON_AOBUS_PWR_CTRL0_REG, pwr_cntl0);