• Jeremy Fitzhardinge's avatar
    HID: hid-input: add support for HID devices reporting Battery Strength · 4f5ca836
    Jeremy Fitzhardinge authored
    Some HID devices, such as my Bluetooth mouse, report their battery
    strength as an event.  Rather than passing it through as a strange
    absolute input event, this patch registers it with the power_supply
    subsystem as a battery, so that the device's Battery Strength can be
    reported to usermode.
    
    The battery appears in sysfs names
    /sys/class/power_supply/hid-<UNIQ>-battery, and it is a child of the
    battery-containing device, so it should be clear what it's the battery of.
    
    Unfortunately on my current Fedora 16 system, while the battery does
    appear in the UI, it is listed as a Laptop Battery with 0% charge (since
    it ignores the "capacity" property of the battery and instead computes
    it from the "energy*" fields, which we can't supply given the limited
    information contained within the HID Report).
    
    Still, this patch is the first step.
    Signed-off-by: default avatarJeremy Fitzhardinge <jeremy@goop.org>
    Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
    4f5ca836
Kconfig 17.8 KB