Re: [PATCH] rtc: imxdi: add wakeup support

From: Martin Kaiser
Date: Wed May 05 2021 - 12:25:36 EST


Hi Alexandre,

thanks for the quick reply.

Thus wrote Alexandre Belloni (alexandre.belloni@xxxxxxxxxxx):

> Doesn't everyone expect the RTC to be a wakeup source? :)

Ok, I'll change this.

> > What is the right approach here? Are there any rtc drivers that act as a
> > wakeup source and can still be unloaded if compiled as a module?

> Yes, when you don't have alarmtimer ;)
> I honestly think the RTC selection needs to be a bit more dynamic but at
> the same time, it would not be great to change it at suspend time. I
> guess the best way would be to allow module unloading and tracking when
> the RTC disappears.

Ok, understood. There's no chance to address this in an rtc driver.

Out of curiousity, I tried adding a .remove_dev function in alarmtimer.
It isn't called when the I try to unload the rtc-imxdi module. It seems
that the module layer checks the refcount and returns an error before we
even attempt to remove the rtc device...

Best regards,
Martin