xref: /openbmc/u-boot/doc/README.watchdog (revision 0c4b382f9041f9f2f00246c8a0ece90dae5451be)
1 Watchdog driver general info
2 
3 CONFIG_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 
12 CONFIG_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 
17 CONFIG_WDT_AT91
18 	Available for AT91SAM9 to service the watchdog.
19 
20 CONFIG_FTWDT010_WATCHDOG
21 	Available for FTWDT010 to service the watchdog.
22 
23 CONFIG_FTWDT010_HW_TIMEOUT
24 	Can be used to change the timeout for FTWDT010.
25 
26 CONFIG_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 
32 CONFIG_XILINX_TB_WATCHDOG
33 	Available for Xilinx Axi platforms to service timebase watchdog timer.
34