Hi,
> On Dec 6, 2016, at 4:25 PM, Roderick Colenbrander <roderick@xxxxxxxxxx> wrote:
>
> Hi,
>
> I looked a bit deeper and found EV_PWR, though it isn't clearly
> defined, but it is used in some places for purposes like this. Would
> this be an acceptable method?
>
I am interested in this too. I recently implemented the ability to
turn off wireless Xbox 360 controllers in [0], but there is no way
to activate this functionality without suspending the whole system.
Some folks [1] have asked for this ability in other scenarios.
[0]: Commit f712a5a05228058f6b74 ("Input: xpad - power off wireless
360 controllers on suspend")
[1]: https://github.com/paroj/xpad/issues/52
> Thanks,
> Roderick
>
> On Thu, Dec 1, 2016 at 6:05 PM, Roderick Colenbrander
> <roderick@xxxxxxxxxx> wrote:
>> Hi,
>>
>> Some of the devices I'm dealing with have methods to disconnect the
>> device through HID reports. This is mostly useful for wireless devices
>> to save battery and power them off e.g. when no activity in a wihle or
>> user wants to turn device off (some devices don't have a power off
>> button).
>>
>> I was trying to figure out if it there is some generic way without
>> inventing a driver specific method. So far I haven't found anything on
>> the HID side. The use case is not that common often a user would
>> unplug a cable, but for some devices there is no real other way.
>>
>> The closest thing I found was 'poweroff' as supported by device power
>> management spec:
>> https://www.kernel.org/doc/Documentation/power/devices.txt. The HID
>> drivers only support a subset of this so far.
>>
>> Does anyone have a good suggestion for handling this?
>>
>> Thanks,
>> Roderick
>
>
>
> --
> Roderick Colenbrander
> Senior Manager of Software Engineering
> Gaikai, a Sony Interactive Entertainment Company
> roderick@xxxxxxxxxx
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