Re: [PATCH v5 2/6] leds: triggers: Add a keyboard backlight trigger

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On 11/24/2016 05:51 PM, Pali Rohár wrote:
> On Thursday 24 November 2016 17:21:19 Jacek Anaszewski wrote:
>> On 11/24/2016 04:36 PM, Pali Rohár wrote:
>>> On Thursday 24 November 2016 16:32:06 Jacek Anaszewski wrote:
>>>> Since it has been reported that POLLPRI notifications on
>>>> brightness file can lead to increased power consumption, and
>>>> having my above statement I don't think that it is a good idea to
>>>> use brightness file for this.
>>>
>>> How is brightness file different from others that it cannot issue
>>> POLLPRI notification?
>>>
>>> I understood that problem is there in case that LED level is
>>> changed too many times per second (like by CPU trigger).
>>>
>>> If this is not that problem can you describe real issue, why we
>>> cannot use POLLPRI for brightness file?
>>
>> It would be inconsistent not to notify all brightness changes on
>> brightness file. We should notify all of them or none.
>
> I understood that we cannot notify about changes done by CPU trigger due
> to high power usage... Or not?

Exactly.

-- 
Best regards,
Jacek Anaszewski

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