u-boot/drivers/watchdog
Rasmus Villemoes 7dd2097e21 watchdog: use time_after_eq() in watchdog_reset()
Some boards don't work with the rate-limiting done in the generic
watchdog_reset() provided by wdt-uclass.

For example, on powerpc, get_timer() ceases working during bootm since
interrupts are disabled before the kernel image gets decompressed, and
when the decompression takes longer than the watchdog device
allows (or enough of the budget that the kernel doesn't get far enough
to assume responsibility for petting the watchdog), the result is a
non-booting board.

As a somewhat hacky workaround (because DT is supposed to describe
hardware), allow specifying hw_margin_ms=0 in device tree to
effectively disable the ratelimiting and actually ping the watchdog
every time watchdog_reset() is called. For that to work, the "has
enough time passed" check just needs to be tweaked a little to allow
the now==next_reset case as well.

Suggested-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Stefan Roese <sr@denx.de>
2021-04-27 08:28:07 +02:00
..
armada-37xx-wdt.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
ast2600_wdt.c wdt: aspeed: Add AST2600 watchdog support 2021-01-18 15:23:05 -05:00
ast_wdt.c dm: Avoid accessing seq directly 2020-12-18 20:32:21 -07:00
at91sam9_wdt.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
bcm6345_wdt.c dm: treewide: Rename auto_alloc_size members to be shorter 2020-12-13 08:00:25 -07:00
booke_wdt.c watchdog: Add booke watchdog driver 2021-04-15 14:22:17 +05:30
cdns_wdt.c dm: Avoid accessing seq directly 2020-12-18 20:32:21 -07:00
cortina_wdt.c watchdog: cortina_wdt: add support for HW WDT on CAxxxx SoCs 2020-02-07 16:15:57 -05:00
designware_wdt.c wdt: dw: Free the clock on error 2021-04-08 15:37:27 +08:00
ftwdt010_wdt.c common: Drop log.h from common header 2020-05-18 21:19:18 -04:00
imx_watchdog.c reset: Remove addr parameter from reset_cpu() 2021-03-02 14:03:02 -05:00
Kconfig watchdog: Add booke watchdog driver 2021-04-15 14:22:17 +05:30
Makefile watchdog: Add booke watchdog driver 2021-04-15 14:22:17 +05:30
mpc8xx_wdt.c watchdog: mpc8xx_wdt: Allow selection of watchdog mode through environment 2020-04-24 10:09:59 -04:00
mt7620_wdt.c watchdog: add watchdog driver for MediaTek MT7620 SoC 2021-01-24 21:39:26 +01:00
mt7621_wdt.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
mtk_wdt.c dm: treewide: Rename auto_alloc_size members to be shorter 2020-12-13 08:00:25 -07:00
octeontx_wdt.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
omap_wdt.c dm: Avoid accessing seq directly 2020-12-18 20:32:21 -07:00
orion_wdt.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
rti_wdt.c dm: Rename DM_FLAG_REMOVE_WITH_PD_ON 2021-02-03 03:38:41 -07:00
s5p_wdt.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
sandbox_wdt.c SPDX: Convert all of our single license tags to Linux Kernel style 2018-05-07 09:34:12 -04:00
sbsa_gwdt.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
sp805_wdt.c common: Drop asm/global_data.h from common header 2021-02-02 15:33:42 -05:00
stm32mp_wdt.c watchdog: stm32mp: migrate trace to dev macro 2021-01-13 09:52:58 +01:00
tangier_wdt.c dm: Avoid accessing seq directly 2020-12-18 20:32:21 -07:00
ulp_wdog.c reset: Remove addr parameter from reset_cpu() 2021-03-02 14:03:02 -05:00
wdt-uclass.c watchdog: use time_after_eq() in watchdog_reset() 2021-04-27 08:28:07 +02:00
xilinx_tb_wdt.c dm: Avoid accessing seq directly 2020-12-18 20:32:21 -07:00
xilinx_wwdt.c clk: zynq: Add dummy clock enable function 2021-02-23 14:56:59 +01:00