AM5728: Watchdog enable in U-boot

Imed Rebhi

Part Number: AM5728

Hello all,

I was able to create an app that enables the watchdog by opening the file /dev/watchdog. I was able to verify it woks because it resets to board if I don't feed it (write 0 to the file) for more than 60 seconds.

I would like to enable the watchdog at the lowest level possible, ideally in u-boot before the kernel starts, that way the board resets in case of my app or kernel failing to start.

How do I go about doing this?

Thanks!

over 6 years ago

0 Kemal R. Shakir over 6 years ago

TI__Guru 55345 points

Hello Imed,

You can enable the watchdog in U-Boot by enabling these menuconfig options.

$ cd <Processor SDK>/
$ make u-boot
$ cd board-support/u-boot-<version>/
$ ARCH=arm make menuconfig
Enable
SPL / TPL ---> [*] Support watchdog drivers
Device Drivers ---> Watchdog Timer Support ---> [*] TI OMAP watchdog driver

Exit
Exit
Exit
Do you wish to save your new configuration?
Yes
$ cp .config configs/am57xx_evm_defconfig
$ cd ../../
$ make u-boot_clean
$ make u-boot

You can test your watchdog by referring to this thread.

Best regards,
Kemal