ACPI_BITREG_WAKE_STATUS
acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value);
(void)acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS,
status = acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS,
acpi_write_bit_register(ACPI_BITREG_WAKE_STATUS, ACPI_CLEAR_STATUS);
acpi_read_bit_register(ACPI_BITREG_WAKE_STATUS, &in_value);