In the SCFW source for IMX8X, where is the SCU hardware watchdog enabled?

[Gandalf-kern]

According to the Porting Guide, the SCU watchdog timer is enabled by default.  The virtual watchdogs are disabled by default (i.e., just not enabled in the SCFW). 

To enable the virtual watchdog timers in the SCFW, it is necessary to configure the MCU watchdog to be on and locked by default.  For example, on the QXP MEK, add the following to board_system_config() in boot.c in the SCFW:

timer_set_wdog_timeout(pt_mcu_0, 5000U);
timer_set_wdog_action(pt_boot, pt_mcu_0, SC_TIMER_WDOG_ACTION_BOARD);
timer_start_wdog(pt_mcu_0, SC_TRUE);

What is unclear is where the SCU hardware watchdog timer is enabled by default?

I see where the PMIC watchdog timer is enabled and serviced by the SCFW, but isn't this different from the SCU hardware watchdog?

[Gandalf-kern]

Adding the following to board_system_config():

timer_set_wdog_timeout(pt_m4_0, 5000U);
timer_set_wdog_action(pt_boot, pt_m4_0, SC_TIMER_WDOG_ACTION_BOARD);
timer_start_wdog(pt_m4_0, SC_TRUE);

This configures the MCU watchdog to be on and locked by default.  What is the difference between this and setting the WDT for the boot partition like the following?

timer_set_wdog_timeout(pt_boot, 120000);

timer_set_sdog_action(SC_PT, pt_boot, SC_TIMER_WDOG_ACTION_BOARD);

timer_start_wdog(pt_boot,0);

[igorpadykov]

Hi Tracy

part of SCFW is provided as binaries (not all SCFW is available in sources), also please look at

below Release Notes(sc_fw_rn.pdf) p.1 from  SCFW Porting Kit​ 1.9.0

 

Best regards
igor