Re: [PATCH 2/3] arm64: dts: ti: k3-am62a: Set Critical Temp. to 105C

[Daniel Schultz]

On 5/2/25 16:49, Nishanth Menon wrote:
> On 07:26-20250502, Daniel Schultz wrote:
> > The AM62Ax SoC supports two temperature ranges:
> > * A: -40 to 105C - Extended Industrial
> > * I: -40 to 125C - Automotive
> >
> > By default, use the lower limit (105 °C) so that any AM62A running
> > in Extended Industrial mode will shut down safely before overheating.
> >
> > If the bootloader detects an Automotive-grade device, it should
> > override this and raise the critical trip point to 125 °C.
> >
> > Signed-off-by: Daniel Schultz <d.schultz@xxxxxxxxx>
> > ---
> >   arch/arm64/boot/dts/ti/k3-am62a-thermal.dtsi | 6 +++---
> >   1 file changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/arch/arm64/boot/dts/ti/k3-am62a-thermal.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-thermal.dtsi
> > index 39ff9118b6c4..40dcb9bab965 100644
> > --- a/arch/arm64/boot/dts/ti/k3-am62a-thermal.dtsi
> > +++ b/arch/arm64/boot/dts/ti/k3-am62a-thermal.dtsi
> Why not create a separate header for industrial grade and rename this as
> automotive grade and let the board file pick the right grade used on the
> board?

Mostly because I copied this from 10e7bfd8114c207ac and with the most 
recent temperature fixups in U-Boot, we also have the missing bootloader 
logic.

I would also prefer an out-of-the-box solution for that.

- Daniel

> > @@ -19,7 +19,7 @@ main0_alert: main0-alert {
> >   			};
> >   
> >   			main0_crit: main0-crit {
> > -				temperature = <125000>;	/* milliCelsius */
> > +				temperature = <105000>;	/* milliCelsius */
> >   				hysteresis = <2000>;	/* milliCelsius */
> >   				type = "critical";
> >   			};
> > @@ -50,7 +50,7 @@ main1_alert: main1-alert {
> >   			};
> >   
> >   			main1_crit: main1-crit {
> > -				temperature = <125000>;	/* milliCelsius */
> > +				temperature = <105000>;	/* milliCelsius */
> >   				hysteresis = <2000>;	/* milliCelsius */
> >   				type = "critical";
> >   			};
> > @@ -81,7 +81,7 @@ main2_alert: main2-alert {
> >   			};
> >   
> >   			main2_crit: main2-crit {
> > -				temperature = <125000>;	/* milliCelsius */
> > +				temperature = <105000>;	/* milliCelsius */
> >   				hysteresis = <2000>;	/* milliCelsius */
> >   				type = "critical";
> >   			};
> > --
> > 2.25.1