On Tue, Jan 23, 2024 at 4:49 PM <neil.armstrong@xxxxxxxxxx> wrote:
>
[snip]
> >
> >>>> +
> >>>> + regulators {
> >>>> + vreg_pmu_rfa_cmn: ldo0 {
> >>>> + regulator-name = "vreg_pmu_rfa_cmn";
> >>>> + regulator-min-microvolt = <760000>;
> >>>> + regulator-max-microvolt = <840000>;
> >>>
> >>> These limits should be applied to &vreg_s2f_0p95 (although I'm just
> >>> guessing how this maps to the upstream supply...
> >>
> >> I'm not following. Why?
> >>
> >
> > Are you saying that the PMU contains a set of LDOs or similar that
> > alter the voltage from what's provided on the external pads?
>
> It's what I observe on WCN785x, on one side we have the usual VDD_AON/VDD_PMU/VDD_RFA/...
> and on the other side the WCN internal PMU generates the VDDXX_PMU_XXX voltages that
> are consumed by the WCN785x again.
> The schematics is clearly split into different entities of the WCN785x:
> - PMU
> - VSS
> - GND
> - PWR
> - CONFIG
> - GPIO
> - RFA
> - PCIE
>
> Neil
>
To be precise: it's page 33 of the QCA6391 datasheet and it defines
"power inputs from host" and "LDO power outputs" with different
voltages.
Bart
[snip]
