HID: Add full support for Logitech Unifying receivers

With this driver, all the devices paired to a single Unifying
receiver are exposed to user processes in separated /input/dev
nodes.

Keyboards with different layouts can be treated differently,
Multiplayer games on single PC (like home theater PC) can
differentiate input coming from different kbds paired to the
same receiver.

Up to now, when Logitech Unifying receivers are connected to a
Linux based system, a single keyboard and a single mouse are
presented to the HID Layer, even if the Unifying receiver can
pair up to six compatible devices. The Unifying receiver by default
multiplexes all incoming events (from multiple keyboards/mice)
into these two.

Signed-off-by: Nestor Lopez Casado <nlopezcasad@logitech.com>
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
index 410eaa902495..d2c97343fc0d 100644
--- a/drivers/hid/Kconfig
+++ b/drivers/hid/Kconfig
@@ -245,6 +245,15 @@ config HID_LOGITECH
         ---help---
         Support for Logitech devices that are not fully compliant with HID standard.
 
+config HID_LOGITECH_DJ
+        tristate "Logitech Unifying receivers full support"
+        depends on HID_LOGITECH
+        default m
+        ---help---
+        Say Y if you want support for Logitech Unifying receivers and devices.
+        Unifying receivers are capable of pairing up to 6 Logitech compliant
+        devices to the same receiver.
+
 config LOGITECH_FF
         bool "Logitech force feedback support"
         depends on HID_LOGITECH