HID: hid-lg4ff: Export the real wheel model and supported alternate modes

Display the real wheel model and supported alternate modes through sysfs. This
applies only to multimode wheels.

Signed-off-by: Michal Malý <madcatxster@devoid-pointer.net>
Tested-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 20 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff b/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff
index 167d9032b970..60f24a1d8119 100644
--- a/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff
+++ b/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff
@@ -5,3 +5,23 @@ 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.
+
+What:           /sys/bus/hid/drivers/logitech/<dev>/alternate_modes
+Date:           Feb 2015
+KernelVersion:  4.1
+Contact:        Michal Malý <madcatxster@gmail.com>
+Description:    Displays a set of alternate modes supported by a wheel. Each
+                mode is listed as follows:
+                  Tag: Mode Name
+                Currently active mode is marked with an asterisk. List also
+                contains an abstract item "native" which always denotes the
+                native mode of the wheel.
+
+What:           /sys/bus/hid/drivers/logitech/<dev>/real_id
+Date:           Feb 2015
+KernelVersion:  4.1
+Contact:        Michal Malý <madcatxster@gmail.com>
+Description:    Displays the real model of the wheel regardless of any
+                alternate mode the wheel might be switched to.
+                It is a read-only value.
+                This entry is not created for devices that have only one mode.