Re: [PATCH v6 1/6] tty: serial: qcom_geni_serial: Use OPP API to set clk/perf state

Viresh Kumar
2020-08-20T10:45:59Z

On 22-07-20, 10:54, Viresh Kumar wrote:
> On 21-07-20, 01:43, Stephen Boyd wrote:
> > It seems that dev_pm_opp_set_rate() calls _find_opp_table() and finds
> > something that isn't an error pointer but then dev_pm_opp_of_add_table()
> > returns an error value because there isn't an operating-points property
> > in DT. We're getting saved because this driver also happens to call
> > dev_pm_opp_set_clkname() which allocates the OPP table a second time
> > (because the first time it got freed when dev_pm_opp_of_add_table()
> > return -ENODEV because the property was missing).
> >
> > Why do we need 'has_opp_table' logic? It seems that we have to keep
> > track of the fact that dev_pm_opp_of_add_table() failed so that we don't
> > put the table again, but then dev_pm_opp_set_clkname() can be called
> > to allocate the table regardless.

I have sent a patchset to clean this stuff up a bit now.

--
viresh