External devices

[Ran Shalit]

On Mon, Sep 8, 2014 at 9:16 PM, AYAN KUMAR HALDER <ayankumarh at gmail.com> wrote:
>> When a device wakes up, what about the cpu , is it still on idle with cpuidle ?
>> for example how a mouse move trigger the screen to wake up ?
>>
> This is a case of system suspend/resume. Your mouse is a wake-up device. It is
> configured to send wakeup interrupts. It would wake up the cpu first
> and then  the cpu wakes up
> all the devices.

Hi,
Do you mean runtime suspend/resume ? Why will the mouse wake the cpu
from idle (cpuidle) ? Isn't it that the wakeup source will wake only
the specific device which was runtime suspended ? Thanks