Re: Can you use the USB HID interface within a driver?

[Kay Sievers]

On Sat, Nov 1, 2008 at 13:32, Adam Nielsen <a.nielsen@xxxxxxxxxxx> wrote:
>>> Or perhaps someone could point me in the direction of a USB HID driver
>>> that does things "properly" already?
>>
>> Please post "lsusb -v" for your device.
>
> Here's the output.  I don't think any of the "class" drivers are suitable,
> except as templates for interfacing with the main HID code...I think...

I think, a real in-kernel driver for HID Power devices, which exports
the device as a "power_supply" device to userspace, would be nice.

That way, USB UPS's which support the HID Power devices:
  http://www.usb.org/developers/devclass_docs/pdcv10.pdf

would show up like any other battery and AC connector and userspace
could handle all of them without any specialized code:
  ls -1 /sys/class/power_supply/BAT0/
  alarm
  energy_full
  energy_full_design
  energy_now
  manufacturer
  model_name
  power
  present
  serial_number
  status
  technology
  type
  voltage_min_design
  voltage_now
  ...

Thanks,
Kay
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