Comment 13 for bug 1480673

Below commits should be related.

commit 73c75d395857960ea135913da7bb9537248a11e6
Author: Hans de Goede <email address hidden>
Date: Fri Aug 4 15:31:04 2017 +0200

    HID: asus: Add T100CHI bluetooth keyboard dock touchpad support

    Put the touchpad in native (absolute coordinate mode) and export it to
    userspace as a touchpad rather then as a mouse.

    Note this requires HID_QUIRK_MULTI_INPUT as the T100CHI keyboard dock
    has all functionality on a single HID interface and userspace expects
    touchpads to be on a separate input_dev. Without MULTI_INPUT userspace
    will ignore the keyboard part of the keyboard/touchpad combo.

    Signed-off-by: Hans de Goede <email address hidden>
    Signed-off-by: Jiri Kosina <email address hidden>

commit 5703e52cc711bc01e72cf12b86a126909c79d213
Author: Hans de Goede <email address hidden>
Date: Sun Jul 2 16:34:15 2017 +0200

    HID: asus: Add T100CHI bluetooth keyboard dock special keys mapping

    The Asus Transformer T100CHI comes with a Bluetooth keyboard dock which
    uses the same 0xff31 Asus vendor HUT page as other Asus keyboards.

    This commit adds its device-id to hid-asus and fixes an issue in the
    descriptor of the 0xff31 Usage, which together fixes the special keys
    on this keyboard not working.

    Signed-off-by: Hans de Goede <email address hidden>
    Signed-off-by: Jiri Kosina <email address hidden>