Re: Re: [RFC 8/9] PCI/pwrctl: add PCI power control core code

[Bjorn Andersson]

On Fri, Feb 02, 2024 at 10:11:42AM +0100, Bartosz Golaszewski wrote:
> On Fri, Feb 2, 2024 at 4:53 AM Bjorn Andersson <andersson@xxxxxxxxxx> wrote:
[..]
> > > +             break;
> > > +     }
> > > +
> > > +     return NOTIFY_DONE;
> > > +}
> > > +
> > > +int pci_pwrctl_device_enable(struct pci_pwrctl *pwrctl)
> >
> > This function doesn't really "enable the device", looking at the example
> > driver it's rather "device_enabled" than "device_enable"...
> >
> 
> I was also thinking about pci_pwrctl_device_ready() or
> pci_pwrctl_device_prepared().

I like both of these.

I guess the bigger question is how the flow would look like in the event
that we need to power-cycle the attached PCIe device, e.g. because
firmware has gotten into a really bad state.

Will we need an operation that removes the device first, and then cut
the power, or do we cut the power and then call unprepared()?

Regards,
Bjorn

> 
> Bart
> 
> [snip!]