samsung-laptop: add battery life extender support

Signed-off-by: Corentin Chary <corentincj@iksaif.net>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Matthew Garrett <mjg@redhat.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-driver-samsung-laptop b/Documentation/ABI/testing/sysfs-driver-samsung-laptop
index 0a810231aad4..a6a56e11ebaf 100644
--- a/Documentation/ABI/testing/sysfs-driver-samsung-laptop
+++ b/Documentation/ABI/testing/sysfs-driver-samsung-laptop
@@ -17,3 +17,13 @@ Description:	Some Samsung laptops have different "performance levels"
                 Specifically, not all support the "overclock" option,
                 and it's still unknown if this value even changes
                 anything, other than making the user feel a bit better.
+
+What:           /sys/devices/platform/samsung/battery_life_extender
+Date:           December 1, 2011
+KernelVersion:  3.3
+Contact:        Corentin Chary <corentin.chary@gmail.com>
+Description:    Max battery charge level can be modified, battery cycle
+                life can be extended by reducing the max battery charge
+                level.
+                0 means normal battery mode (100% charge)
+                1 means battery life extender mode (80% charge)