Messages in this thread | | | Subject | Re: [PATCH 3/3] arm64: dts: rk3399: Add init voltage for vdd_log | From | Kever Yang <> | Date | Tue, 12 Nov 2019 18:02:37 +0800 |
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Markus,
On 2019/11/12 下午4:16, Markus Reichl wrote: > Hi Kever, > > have a rk3399-roc-pc running mainline U-Boot and kernel and vdd_log is > showing 1118 mV.
The rk3399-roc-pc have the same vdd_log circuit in schematic, so it should like the patch 1/3 of
this patch set.
I don't understand who is setting this value, maybe the default value without pwm regulator enabled?
> Is this a danger for the board? > How to fix it?
The best way is to set correct min/max microvolt of the regulator(measure with PWM output low and high),
(note that if no driver touch the regulator, the PWM is default input, not output;)
and set a init-microvolt for U-Boot driver, and I think no kernel driver touch this regulator now.
Thanks,
- Kever
> Btw. vin-supply for this pwm-regulator is ignored and I could not find it > in bindings doc. > > Gruß,
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