Documentation/acpi-hotkey.txt

   1 driver/acpi/hotkey.c implement:
   2 1. /proc/acpi/hotkey/event_config
   3 (event based hotkey or event config interface):
   4 a. add a  event based hotkey(event) :
   5 echo "0:bus::action:method:num:num" > event_config
   6
   7 b. delete a event based hotkey(event):
   8 echo "1:::::num:num" > event_config
   9
  10 c.  modify a event based hotkey(event):
  11 echo "2:bus::action:method:num:num" > event_config
  12
  13 2. /proc/acpi/hotkey/poll_config
  14 (polling based hotkey or event config interface):
  15 a.add a polling based hotkey(event) :
  16 echo "0:bus:method:action:method:num" > poll_config
  17 this adding command will create a proc file
  18 /proc/acpi/hotkey/method, which is used to get
  19 result of polling.
  20
  21 b.delete a polling based hotkey(event):
  22 echo "1:::::num" > event_config
  23
  24 c.modify a polling based hotkey(event):
  25 echo "2:bus:method:action:method:num" > poll_config
  26
  27 3./proc/acpi/hotkey/action
  28 (interface to call aml method associated with a
  29 specific hotkey(event))
  30 echo "event_num:event_type:event_argument" >
  31         /proc/acpi/hotkey/action.
  32 The result of the execution of this aml method is
  33 attached to /proc/acpi/hotkey/poll_method, which is dnyamically
  34 created.  Please use command "cat /proc/acpi/hotkey/polling_method"
  35 to retrieve it.
  36
  37 Note: Use cmdline "acpi_generic_hotkey" to over-ride
  38 loading any platform specific drivers.