The function disable_thermal_cpu_nodes() corrupts the cooling-device
property.
For example, booting an i.MX93 devices with only one A55 core (IMX93x1)
with the cooling-device property set to:
$ dtc -I dtb foo.dtb | grep cooling-device
cooling-device = <0x08 0xffffffff 0xffffffff 0x09 0xffffffff 0xffffffff>;
Linux shows the following error at boot:
[ 1.715189] OF: /thermal-zones/cpu-thermal/cooling-maps/map0: could not find phandle 1083699869
[ 1.723977] thermal_sys: Add a cooling_device property with at least one device
[ 1.731285] thermal thermal_zone0: binding zone cpu-thermal with cdev thermal-devfreq-0 failed:-2
because the cooling-device property in the device tree passed to the
kernel is
$ dtc -I dtb /sys/firmware/fdt | grep cooling-device
cooling-device = <0x4097f29d 0x00 0xb05aef9d>;
The issue is because the wrong variable type is passed to the function
fdt_setprop() called in the function disable_thermal_cpu_nodes(). With
the variable type fixed, the error at boot is gone and the property is
properly set:
$ dtc -I dtb /sys/firmware/fdt | grep cooling-device
cooling-device = <0x08 0xffffffff 0xffffffff>;
Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
Fix the critical thermal threshold for i.MX processors, this was changed
while moving the code from imx8m/imx9 directories into a shared place.
There is no need to keep the critical threshold 5 degrees less than the
SoC maximum temperature threshold, what is actually going to happen in
practice is that we are going to power-off the board when the SoC is
still within its working temperature range.
In addition to that this is a change in the actual behavior, that is
introducing a regression to users, and it was hidden within a software
refactoring.
Fixes: d0fe80890a ("imx: Generalize fixup_thermal_trips")
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
i.MX8M and i.MX9 have duplicated fixup_thermal_trips, so move it
to arch/arm/mach-imx/fdt.c to avoid duplicated code.
The critial temperature point for i.MX9 set to "maxc - 5" back to give
some margin.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
disable_cpu_nodes could be reused by i.MX9, so move disable_cpu_nodes
out from mach-imx/imx8m/soc.c to mach-imx/fdt.c and update
disable_cpu_nodes to make it easy to support different socs.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
