u-boot/arch/m68k/lib
Rasmus Villemoes 933ada560b allow opting out of WATCHDOG_RESET() from timer interrupt
Having WATCHDOG_RESET() called automatically from the timer interrupt
runs counter to the idea of a watchdog device - if the board runs into
an infinite loops with interrupts still enabled, the watchdog will
never fire.

When using CONFIG_(SPL_)WDT, the watchdog_reset function is a lot more
complicated than just poking a few SOC-specific registers - it
involves accessing all kinds of global data, and if the interrupt
happens at the wrong time (say, in the middle of an WATCHDOG_RESET()
call from ordinary code), that can end up corrupting said global data.

Allow the board to opt out of calling WATCHDOG_RESET() from the timer
interrupt handler by setting CONFIG_SYS_WATCHDOG_FREQ to 0 - as that
setting is currently nonsensical (it would be compile-time
divide-by-zero), it cannot affect any existing boards.

Add documentation for both the existing and extended meaning of
CONFIG_SYS_WATCHDOG_FREQ.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
2021-04-27 08:28:07 +02:00
..
ashldi3.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
bdinfo.c Merge branch '2021-02-02-drop-asm_global_data-when-unused' 2021-02-15 10:16:45 -05:00
bootm.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
cache.c common: Move some cache and MMU functions out of common.h 2019-12-02 18:23:55 -05:00
fec.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
interrupts.c common: Drop asm/ptrace.h from common header 2020-05-18 21:19:23 -04:00
lshrdi3.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
Makefile bdinfo: m68k: Move m68k-specific info into its own file 2020-06-25 13:24:12 -04:00
muldi3.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
time.c allow opting out of WATCHDOG_RESET() from timer interrupt 2021-04-27 08:28:07 +02:00
traps.c common: board_r: Drop arch-specific ifdefs around initr_trap 2021-01-15 14:36:12 -05:00