I am facing troubles with the watchdog on imx6ul. I am using u-boot 2016.03.
* the WCR register to 0xFF34 (WDT and WDE enabled and timeout 128s)
* the WMCR register to 0x0000 (Power down counter disabled)
* the WSR to 0x5555 and afterwards to 0xaaaa
After 12 seconds, the board reboots and reset cause is WDOG.
If I change the timeout to 60 seconds, nothing changes. Also after 12 seconds, the board reboots.
What could cause this strange behaviour?