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thinkpad-acpi: enhance led support

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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>
This commit is contained in:
Henrique de Moraes Holschuh
2009-05-30 13:25:08 -03:00
committed by Len Brown
parent 60201732f0
commit f21179a47f
2 changed files with 96 additions and 15 deletions
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23
Documentation/laptops/thinkpad-acpi.txt
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@@ -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.