Advanced Configuration and Power Interface
driver provides basic support for ACPI
including loading ACPI tables from the firmware, parsing and interpreting AML
code, event handling, suspending and powering off, and attaching device
drivers. Userland may access
by using the
The following devices can attach to
- Power management data device. May only be opened read-only. May be opened
by multiple concurrent users.
- Power management control device. May be opened read-write or write-only.
May only be opened by one user at a time. An attempt to open the file when
in use will fail, returning
acpi driver first appeared in