Re: [PATCH V2 1/2] opp: Allow dev_pm_opp_get_opp_table() to return -EPROBE_DEFER

Viresh Kumar
2020-10-20T05:56:02Z

On 20-10-20, 10:35, Viresh Kumar wrote:
> On 19-10-20, 15:10, Sudeep Holla wrote:
> > On Mon, Oct 19, 2020 at 04:05:35PM +0530, Viresh Kumar wrote:
> > > On 19-10-20, 11:12, Sudeep Holla wrote:
> > > > Yes it has clocks property but used by SCMI(for CPUFreq/DevFreq) and not
> > > > by any clock provider driver. E.g. the issue you will see if "clocks"
> > > > property is used instead of "qcom,freq-domain" on Qcom parts.
> > >
> > > Okay, I understand. But what I still don't understand is why it fails
> > > for you. You have a clocks property in DT for the CPU, the OPP core
> > > tries to get it and will get deferred-probed, which will try probing
> > > at a later point of time and it shall work then. Isn't it ?
> > >
> >
> > Nope unfortunately. We don't have clock provider, so clk_get will
> > never succeed and always return -EPROBE_DEFER.
>
> Now this is really bad, you have a fake clocks property, how is the
> OPP core supposed to know it ? Damn.

What about instead of fixing the OPP core, which really is doing the
right thing, we fix your driver (as you can't fix the DT) and add a
dummy CPU clk to make it all work ?

--
viresh