I'm using the Sumo release on an IMX8MQ. Could any one please point me to the imx8m-specific function called by machine_restart()?
I thought it was mxc_reset() in arch/arm/mach-imx/system.c, but inserting a #error in that function doesn't break the build. That's a pity, because mxc_reset() does exactly what I want: force WDOG1 to fire the system reset signal.
The machine_restart() in arch/arm64/kernel/process.c references two "possible suspects":
1. the pointer arm_pm_restart
2. the function do_kernel_restart()
arm_pm_restart appears to be set in the xen/enlighten.c, but that quickly led to the deferencing of a jump table that I haven't been able to find yet.
On the other hand, do_kernel_restart() appears to walk a list of registered reset handlers, none of which look like they would reset the platform.
Any light that anyone could throw on this would be much appreciated!
Thanks & Regards,
Sr Software Engineer