diff options
Diffstat (limited to 'Documentation/laptops')
| -rw-r--r-- | Documentation/laptops/thinkpad-acpi.txt | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/Documentation/laptops/thinkpad-acpi.txt b/Documentation/laptops/thinkpad-acpi.txt index a41bc893f8d..af1f2bcb6f6 100644 --- a/Documentation/laptops/thinkpad-acpi.txt +++ b/Documentation/laptops/thinkpad-acpi.txt @@ -693,16 +693,31 @@ while others are still having problems. For more information: https://bugs.freedesktop.org/show_bug.cgi?id=2000 -ThinkLight control -- /proc/acpi/ibm/light ------------------------------------------- +ThinkLight control +------------------ + +procfs: /proc/acpi/ibm/light +sysfs attributes: as per led class, for the "tpacpi::thinklight" led + +procfs notes: -The current status of the ThinkLight can be found in this file. A few -models which do not make the status available will show it as -"unknown". The available commands are: +The ThinkLight status can be read and set through the procfs interface. A +few models which do not make the status available will show the ThinkLight +status as "unknown". The available commands are: echo on > /proc/acpi/ibm/light echo off > /proc/acpi/ibm/light +sysfs notes: + +The ThinkLight sysfs interface is documented by the led class +documentation, in Documentation/leds-class.txt. The ThinkLight led name +is "tpacpi::thinklight". + +Due to limitations in the sysfs led class, if the status of the thinklight +cannot be read or if it is unknown, thinkpad-acpi will report it as "off". +It is impossible to know if the status returned through sysfs is valid. + Docking / undocking -- /proc/acpi/ibm/dock ------------------------------------------ |