Hi community,
I'm working on enabling Watchdog timer in uboot for imx8mm board. After the WDT is enabled in uboot, and shows the following logs;
WDT: Started watchdog@30280000 with servicing (60s timeout)
MMC: FSL_SDHC: 0, FSL_SDHC: 1
Loading Environment from MMC... OK
In: serial@30880000
Out: serial@30880000
Err: serial@30880000
SEC0: RNG instantiated
Net: Could not get PHY for FEC0: addr 0
No ethernet found.
Hit any key to stop autoboot: 0
=> md.w 30280000 1
30280000: 773f ?w
But WDT doesn't hit after 60sec. Does anyone know why watchdog is not hitting after 60 seconds? I tried sleep and some other technqiues to hang the uboot but watchdog didn't hit after 60 seconds
If I ran the below command the WDT hit after 0.5 sec and system reboots which is expected as per the documentation(imx8mm reference manual);
=> mw.w 30280000 0034 1
but as soon as the reset timeout is increased the WDT doesn't reset anymore
=> mw.w 30280000 0134 1
=> mw.w 30280000 0334 1
Furthermore, I have used wdt command in uboot, enabling and setting wdt but that also didn't worked;
=> wdt list
watchdog@30280000 (imx_wdt)
=> wdt dev watchdog@30280000
=> wdt start 3000
=> wdt start 1200
=> wdt start 1200
but if I make the time equal of less than 900msec the WDT start to hit;
=> wdt start 900
I have another question, does the watchdog got hit if I stop in uboot prompt when WDT is enabled?
Any help will be appreciated, Thank you!
