HID: lg4ff - Document sysfs interface for range setting

Adds documentation of the sysfs interface used to set the wheel range.

Signed-off-by: Michal Malý <madcatxster@gmail.com>
Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

diff --git a/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff b/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff
new file mode 100644 (file)
index 0000000..9aec8ef
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff
@@ -0,0 +1,7 @@
+What:          /sys/module/hid_logitech/drivers/hid:logitech/<dev>/range.
+Date:          July 2011
+KernelVersion: 3.2
+Contact:       Michal Malý <madcatxster@gmail.com>
+Description:   Display minimum, maximum and current range of the steering
+               wheel. Writing a value within min and max boundaries sets the
+               range of the wheel.