Re: Oops while booting 5.15.2 on Nokia N900

[Merlijn Wajer <merlijn@wizzup.org>]

Hi,

On 13/12/2021 14:50, Tony Lindgren wrote:
> * Merlijn Wajer <merlijn@wizzup.org> [211213 10:45]:
>
>> and I am no longer seeing the oopses or resets when running "sleep 30;
>> blkid" from minimal userspace.
> 
> If disabling the cpu_thermal makes things behave, chances are we have wrong
> thermal values in the dts for n900 and possible all 34xx devices. The 36xx
> values are behaving AFAIK.

Just disabling the bandgap doesn't seem to be enough. I also tried
disabling just the bandgap and thermal_zones, but that is also isn't
enough. However, *just* disabling cpu_thermal also isn't enough.

Disabling both cpu_thermal and bandgap is enough to stop the oopses [1].
So it sounds like there might potentially be some problems in
cpu_thermal as well then?

Regards,
Merlijn

[1]

> diff --git a/arch/arm/boot/dts/omap3-n900.dts b/arch/arm/boot/dts/omap3-n900.dts
> index 1746a44e96bc..7aedd21282e1 100644
> --- a/arch/arm/boot/dts/omap3-n900.dts
> +++ b/arch/arm/boot/dts/omap3-n900.dts
> @@ -28,6 +28,19 @@ &aes2_target {
>         status = "disabled";
>  };
> 
> +&cpu_thermal {
> +       status = "disabled";
> +};
> +
> +&bandgap {
> +       status = "disabled";
> +};
> +//
> +//&thermal_zones {
> +//     status = "disabled";
> +//};
> +
> +
>  / {
>         model = "Nokia N900";
>         compatible = "nokia,omap3-n900", "ti,omap3430", "ti,omap3";