Motion evdev

Dolphin supports the motion evdev devices but setting it up is a bit awkward. Nintendo Switch controllers (Joy-Con and Pro controller) are supported through the hid-nintendo driver. Sony DualShock 4 and DualSense through hid-sony/hid-playstation.

The HID kernel driver exposes 2 (or more) evdev devices, one for the buttons and another for the accelerators/gyroscopes. The hid-nintendo driver exposes the motion axis on an "IMU" device while hid-playstation named it "Wireless Controller Motion Sensors". Do note that Nintendo Joy-Cons will have 2 devices each (4 in total).

You may need to add the users to a specific group to be allowed access. On Arch Linux this group is input.

It took me a bit of time figuring out which axis corresponds with the right motion control in Dolphin. These axis might change in the future when evdev standardizes them.

Dolphin motion	Switch controllers	Sony DualSense/DualShock4
Accel Up	Accel Z+	Accel Y+
Accel Down	Accel Z-	Accel Y-
Accel Left	Accel Y+	Accel X-
Accel Right	Accel Y-	Accel X+
Accel Forward	Accel X+	Accel Z-
Accel Backward	Accel X-	Accel Z+
Pitch Up	Gyro Y-	Gyro X+
Pitch Down	Gyro Y+	Gyro X-
Roll Left	Gyro X-	Gyro Z+
Roll Right	Gyro X+	Gyro Z-
Yaw Left	Gyro Z+	Gyro Y+
Yaw Right	Gyro Z-	Gyro Y-

As the default buttons are all wrong reset all buttons in the Wii Remote configuration. To configure the motion controls you have to use the advanced config window. Right click on each motion button in the Wii Remote configure window. Select the appropriate IMU device at the top in the device selection.

Select the corresponding Accel or Gyro axis, select it and click OK. For example for Accel Up in Dolphin you need to select Accel Z+. The end result should look like below.

Repeat this for every motion.