[U-Boot] arm: ti: SF commands raise watchdog reset

[Daniel Gorsulowski]

Hello,

I have an issue with sf commands. If a command takes longer than the 
defined HW Watchdog timeout, the board resets.

My Platform is:
Board: Custom
CPU: Sitara AM3357ZCZ
Flash: Micron N25Q256A13E1240F Serial NOR Flash
U-Boot: repoduced on 2016.01 and 2016.03

Commands to reproduce the problem:
=> sf probe
SF: Detected N25Q256 with page size 256 Bytes, erase size 4 KiB, total 
32 MiB
=> sf erase 0 2000000
 >>> board resets after 1 minute <<<

If I do
#undef CONFIG_HW_WATCHDOG
in my board config, the board runs stable.


The Watchdog ist set to 60 seconds. See drivers/watchdog/omap_wdt.c:
...
#define WDT_HW_TIMEOUT 60
...
void hw_watchdog_init(void)
{
...
	omap_wdt_set_timeout(WDT_HW_TIMEOUT);
...
}


I have no idea how to fix this, so I ask you.
I guess, nobody has similar hardware to reproduce this. But maybe 
someone has an idea and can tell me what I could try out.

Maybe the issue is related to 
http://lists.denx.de/pipermail/u-boot/2015-November/232844.html

Kind regards
Daniel