Re: [PATCH RFC] hid-input: add support for HID devices reporting Battery Strength

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On Wed, 23 Nov 2011, Jeremy Fitzhardinge wrote:

> 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: Jeremy Fitzhardinge <jeremy@xxxxxxxx>

Thanks Jeremy, I am going to queue this for 3.3.

-- 
Jiri Kosina
SUSE Labs
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