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| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | 2009-05-30 13:25:08 -0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2009-06-17 22:48:22 -0400 |
| commit | f21179a47ff8d1046a61c1cf5920244997a4a7bb (patch) | |
| tree | f90635e4dc7f5602d960a199877a4bb20c6b7be6 /Documentation | |
| parent | 60201732f03c1231742e5872abe55a3bf59849a5 (diff) | |
| download | linux-stable-f21179a47ff8d1046a61c1cf5920244997a4a7bb.tar.gz linux-stable-f21179a47ff8d1046a61c1cf5920244997a4a7bb.tar.bz2 linux-stable-f21179a47ff8d1046a61c1cf5920244997a4a7bb.zip | |
thinkpad-acpi: enhance led support
Add support for extra LEDs on recent ThinkPads, and avoid registering
with the led class the LEDs which are not available for a given
ThinkPad model.
All non-restricted LEDs are always available through the procfs
interface, as the firmware doesn't care if an attempt is made to
access an invalid LED.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/laptops/thinkpad-acpi.txt | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt index e7e9a69069e1..88fc0661de56 100644 --- a/Documentation/laptops/thinkpad-acpi.txt +++ b/Documentation/laptops/thinkpad-acpi.txt @@ -920,7 +920,7 @@ The available commands are: echo '<LED number> off' >/proc/acpi/ibm/led echo '<LED number> blink' >/proc/acpi/ibm/led -The <LED number> range is 0 to 7. The set of LEDs that can be +The <LED number> range is 0 to 15. The set of LEDs that can be controlled varies from model to model. Here is the common ThinkPad mapping: @@ -932,6 +932,11 @@ mapping: 5 - UltraBase battery slot 6 - (unknown) 7 - standby + 8 - dock status 1 + 9 - dock status 2 + 10, 11 - (unknown) + 12 - thinkvantage + 13, 14, 15 - (unknown) All of the above can be turned on and off and can be made to blink. @@ -940,10 +945,12 @@ sysfs notes: The ThinkPad LED sysfs interface is described in detail by the LED class documentation, in Documentation/leds-class.txt. -The leds are named (in LED ID order, from 0 to 7): +The LEDs are named (in LED ID order, from 0 to 12): "tpacpi::power", "tpacpi:orange:batt", "tpacpi:green:batt", "tpacpi::dock_active", "tpacpi::bay_active", "tpacpi::dock_batt", -"tpacpi::unknown_led", "tpacpi::standby". +"tpacpi::unknown_led", "tpacpi::standby", "tpacpi::dock_status1", +"tpacpi::dock_status2", "tpacpi::unknown_led2", "tpacpi::unknown_led3", +"tpacpi::thinkvantage". Due to limitations in the sysfs LED class, if the status of the LED indicators cannot be read due to an error, thinkpad-acpi will report it as @@ -958,6 +965,12 @@ ThinkPad indicator LED should blink in hardware accelerated mode, use the "timer" trigger, and leave the delay_on and delay_off parameters set to zero (to request hardware acceleration autodetection). +LEDs that are known not to exist in a given ThinkPad model are not +made available through the sysfs interface. If you have a dock and you +notice there are LEDs listed for your ThinkPad that do not exist (and +are not in the dock), or if you notice that there are missing LEDs, +a report to ibm-acpi-devel@lists.sourceforge.net is appreciated. + ACPI sounds -- /proc/acpi/ibm/beep ---------------------------------- @@ -1555,3 +1568,7 @@ Sysfs interface changelog: 0x020300: hotkey enable/disable support removed, attributes hotkey_bios_enabled and hotkey_enable deprecated and marked for removal. + +0x020400: Marker for 16 LEDs support. Also, LEDs that are known + to not exist in a given model are not registered with + the LED sysfs class anymore. |