ACPI: thinkpad-acpi: add brightness_force parameter
Add a "brightness_enable" module parameter that allows the local admin to
force the backlight support to not be enabled.
It can also be used to force the backlight support to be enabled, but that
is currently a no-op as the backlight support is enabled by default when
available. This will be changed by a different patch.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
diff --git a/Documentation/thinkpad-acpi.txt b/Documentation/thinkpad-acpi.txt
index a743bfa..f877c13 100644
--- a/Documentation/thinkpad-acpi.txt
+++ b/Documentation/thinkpad-acpi.txt
@@ -944,6 +944,10 @@
standard ACPI interface, it is best to use it instead of this direct
ThinkPad-specific interface.
+The brightness_enable module parameter can be used to control whether
+the LCD brightness control feature will be enabled when available.
+brightness_enable=0 forces it to be disabled.
+
Procfs notes:
The available commands are: