ACPI_BITREG_SCI_ENABLE
acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
status = acpi_read_bit_register(ACPI_BITREG_SCI_ENABLE, &value);
acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);
acpi_write_bit_register(ACPI_BITREG_SCI_ENABLE, 1);