xref: /openbmc/u-boot/doc/README.watchdog (revision 8eef803a)
1Watchdog driver general info
2
3CONFIG_HW_WATCHDOG
4	This enables hw_watchdog_reset to be called during various loops,
5	including waiting for a character on a serial port. But it
6	does not also call hw_watchdog_init. Boards which want this
7	enabled must call this function in their board file. This split
8	is useful because some rom's enable the watchdog when downloading
9	new code, so it must be serviced, but the board would rather it
10	was off. And, it cannot always be turned off once on.
11
12CONFIG_WATCHDOG_TIMEOUT_MSECS
13	Can be used to change the timeout for i.mx31/35/5x/6x.
14	If not given, will default to maximum timeout. This would
15	be 128000 msec for i.mx31/35/5x/6x.
16
17CONFIG_WDT_AT91
18	Available for AT91SAM9 to service the watchdog.
19
20CONFIG_FTWDT010_WATCHDOG
21	Available for FTWDT010 to service the watchdog.
22
23CONFIG_FTWDT010_HW_TIMEOUT
24	Can be used to change the timeout for FTWDT010.
25
26CONFIG_IMX_WATCHDOG
27	Available for i.mx31/35/5x/6x to service the watchdog. This is not
28	automatically set because some boards (vision2) still need to define
29	their own hw_watchdog_reset routine.
30	TODO: vision2 is removed now, so perhaps this can be changed.
31
32CONFIG_XILINX_TB_WATCHDOG
33	Available for Xilinx Axi platforms to service timebase watchdog timer.
34