HID: wiimote: add sysfs extension/device-type attrs

Two new attributes, "extension" and "devtype" now allow user-space to read
the extension type and device type. As device detection is asynchronous,
we send a CHANGED event after it is done. This also allows user-space to
wait for a device to settle before opening its input event devices.

The "extension" device is compatible with the old "extension" sysfs field
(which was registered by the static extension support code).

Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 23 insertions, 1 deletions

diff --git a/Documentation/ABI/testing/sysfs-driver-hid-wiimote b/Documentation/ABI/testing/sysfs-driver-hid-wiimote
index 3d98009f447a..e8f6b16723e8 100644
--- a/Documentation/ABI/testing/sysfs-driver-hid-wiimote
+++ b/Documentation/ABI/testing/sysfs-driver-hid-wiimote
@@ -12,7 +12,7 @@ Description:	Make it possible to set/get current led state. Reading from it
 What:           /sys/bus/hid/drivers/wiimote/<dev>/extension
 Date:           August 2011
 KernelVersion:  3.2
-Contact:        David Herrmann <dh.herrmann@googlemail.com>
+Contact:        David Herrmann <dh.herrmann@gmail.com>
 Description:    This file contains the currently connected and initialized
                 extensions. It can be one of: none, motionp, nunchuck, classic,
                 motionp+nunchuck, motionp+classic
@@ -20,3 +20,25 @@ Description:	This file contains the currently connected and initialized
                 the official Nintendo Nunchuck extension and classic is the
                 Nintendo Classic Controller extension. The motionp extension can
                 be combined with the other two.
+                Starting with kernel-version 3.11 Motion Plus hotplugging is
+                supported and if detected, it's no longer reported as static
+                extension. You will get uevent notifications for the motion-plus
+                device then.
+
+What:           /sys/bus/hid/drivers/wiimote/<dev>/devtype
+Date:           May 2013
+KernelVersion:  3.11
+Contact:        David Herrmann <dh.herrmann@gmail.com>
+Description:    While a device is initialized by the wiimote driver, we perform
+                a device detection and signal a "change" uevent after it is
+                done. This file shows the detected device type. "pending" means
+                that the detection is still ongoing, "unknown" means, that the
+                device couldn't be detected or loaded. "generic" means, that the
+                device couldn't be detected but supports basic Wii Remote
+                features and can be used.
+                Other strings for each device-type are available and may be
+                added if new device-specific detections are added.
+                Currently supported are:
+                        gen10: First Wii Remote generation
+                        gen20: Second Wii Remote Plus generation (builtin MP)
+                        balanceboard: Wii Balance Board