HID: hid-logitech: Introduce control for combined pedals feature

Introduce a dev_attr which can be used to combine the accelerator
and brake pedals into a single axis. This is useful for older games
which can not handle seperate accelerator and brake.

Signed-off-by: Simon Wood <simon@mungewell.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 9 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff b/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff
index db197a879580..9cd7c5adeb7e 100644
--- a/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff
+++ b/Documentation/ABI/testing/sysfs-driver-hid-logitech-lg4ff
@@ -50,3 +50,12 @@ 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.
+
+What:           /sys/bus/hid/drivers/logitech/<dev>/combine_pedals
+Date:           Sep 2016
+KernelVersion:  4.9
+Contact:        Simon Wood <simon@mungewell.org>
+Description:    Controls whether a combined value of accelerator and brake is
+                reported on the Y axis of the controller. Useful for older games
+                which can do not work with separate accelerator/brake axis.
+                Off ('0') by default, enabled by setting '1'.