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SubjectRe: [PATCH] arm64: dts: meson: vim3: reduce cpu thermal fan trigger temperature
Hello Neil,


Neil Armstrong <narmstrong@baylibre.com> 于2021年6月11日周五 下午3:15写道:
>
> Hi,
>
> On 11/06/2021 08:54, Nick Xie wrote:
> > Hello Neil,
> >
> > The MCU FAN won't work until the temperature reach to 80 degree centigrade,
> > Do you think the temperature is too high?
>
> I think 80 is tool high, but I fear 50 is way too low, but if you think 50 is OK after you ran some tests, just add it to the commit log and it's ok for me.

I think it is OK, we use it for a long time.

Thanks.

>
> Neil
>
> >
> > Thanks.
> >
> > Neil Armstrong <narmstrong@baylibre.com <mailto:narmstrong@baylibre.com>> 于2021年6月11日周五 下午2:44写道:
> >
> > Hi Nick,
> >
> > On 09/06/2021 03:28, xieqinick@gmail.com <mailto:xieqinick@gmail.com> wrote:
> > > From: Nick Xie <nick@khadas.com <mailto:nick@khadas.com>>
> > >
> > > Reduce the MCU FAN trigger temperature from
> > > 80 degree centigrade to 50 degree centigrade.
> >
> > Can you add some more rationale to this change ?
> >
> > >
> > > Signed-off-by: Nick Xie <nick@khadas.com <mailto:nick@khadas.com>>
> > > ---
> > > arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi b/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
> > > index 66d67524b031..a9c34fee91f4 100644
> > > --- a/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
> > > +++ b/arch/arm64/boot/dts/amlogic/meson-khadas-vim3.dtsi
> > > @@ -256,7 +256,7 @@ &cecb_AO {
> > > &cpu_thermal {
> > > trips {
> > > cpu_active: cpu-active {
> > > - temperature = <80000>; /* millicelsius */
> > > + temperature = <50000>; /* millicelsius */
> > > hysteresis = <2000>; /* millicelsius */
> > > type = "active";
> > > };
> > >
> >
> > With that:
> > Reviewed-by: Neil Armstrong <narmstrong@baylibre.com <mailto:narmstrong@baylibre.com>>
> >
>

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