[U-Boot] Periodic task

[Heiko Schocher]

Hello Ran,

Am 25.08.2015 um 22:03 schrieb Ran Shalit:
> Hello,
>
> I need to do some periodic very simple task during u-boot prompt
> (while u-boot wais for commands). The task is very simple, just
> writing into a watchdog refresh register.
> But it seems that it's very difficult to "hack" u-boot with such periodic task.
> I see that main loop is waiting in loop for characters in a call to
> getc, which is a blocking command. If it was non-blocking, it might
> have help me. I'm not sure if there is a way to replace the getc with
> a non-blocking call.
>
> Does anyone have any idea if there is some simple way to do periodic
> task in u-boot  ?

As you want to trigger a watchdog, have a look at
u-boot:/drivers/watchdog
and grep the U-Boot code for
CONFIG_WATCHDOG
CONFIG_HW_WATCHDOG

bye,
Heiko
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