==========================
WatchDog Module Parameters
==========================
This file provides information on the module parameters of many of
the Linux watchdog drivers. Watchdog driver parameter specs should
be listed here unless the driver has its own driver-specific information
file.
See Documentation/admin-guide/kernel-parameters.rst for information on
providing kernel parameters for builtin drivers versus loadable
modules.
-------------------------------------------------
watchdog core:
open_timeout:
Maximum time, in seconds, for which the watchdog framework will take
care of pinging a running hardware watchdog until userspace opens the
corresponding /dev/watchdogN device. A value of 0 means an infinite
timeout. Setting this to a non-zero value can be useful to ensure that
either userspace comes up properly, or the board gets reset and allows
fallback logic in the bootloader to try something else.
-------------------------------------------------
acquirewdt:
wdt_stop:
Acquire WDT 'stop' io port (default 0x43)
wdt_start:
Acquire WDT 'start' io port (default 0x443)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
advantechwdt:
wdt_stop:
Advantech WDT 'stop' io port (default 0x443)
wdt_start:
Advantech WDT 'start' io port (default 0x443)
timeout:
Watchdog timeout in seconds. 1<= timeout <=63, default=60.
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
alim1535_wdt:
timeout:
Watchdog timeout in seconds. (0 < timeout < 18000, default=60
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
alim7101_wdt:
timeout:
Watchdog timeout in seconds. (1<=timeout<=3600, default=30
use_gpio:
Use the gpio watchdog (required by old cobalt boards).
default=0/off/no
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
ar7_wdt:
margin:
Watchdog margin in seconds (default=60)
nowayout:
Disable watchdog shutdown on close
(default=kernel config parameter)
-------------------------------------------------
armada_37xx_wdt:
timeout:
Watchdog timeout in seconds. (default=120)
nowayout:
Disable watchdog shutdown on close
(default=kernel config parameter)
-------------------------------------------------
at91rm9200_wdt:
wdt_time:
Watchdog time in seconds. (default=5)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
at91sam9_wdt:
heartbeat:
Watchdog heartbeats in seconds. (default = 15)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
bcm47xx_wdt:
wdt_time:
Watchdog time in seconds. (default=30)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
coh901327_wdt:
margin:
Watchdog margin in seconds (default 60s)
-------------------------------------------------
cpu5wdt:
port:
base address of watchdog card, default is 0x91
verbose:
be verbose, default is 0 (no)
ticks:
count down ticks, default is 10000
-------------------------------------------------
cpwd:
wd0_timeout:
Default watchdog0 timeout in 1/10secs
wd1_timeout:
Default watchdog1 timeout in 1/10secs
wd2_timeout:
Default watchdog2 timeout in 1/10secs
-------------------------------------------------
da9052wdt:
timeout:
Watchdog timeout in seconds. 2<= timeout <=131, default=2.048s
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
davinci_wdt:
heartbeat:
Watchdog heartbeat period in seconds from 1 to 600, default 60
-------------------------------------------------
ebc-c384_wdt:
timeout:
Watchdog timeout in seconds. (1<=timeout<=15300, default=60)
nowayout:
Watchdog cannot be stopped once started
-------------------------------------------------
ep93xx_wdt:
nowayout:
Watchdog cannot be stopped once started
timeout:
Watchdog timeout in seconds. (1<=timeout<=3600, default=TBD)
-------------------------------------------------
eurotechwdt:
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
io:
Eurotech WDT io port (default=0x3f0)
irq:
Eurotech WDT irq (default=10)
ev:
Eurotech WDT event type (default is `int`)
-------------------------------------------------
gef_wdt:
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
geodewdt:
timeout:
Watchdog timeout in seconds. 1<= timeout <=131, default=60.
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
i6300esb:
heartbeat:
Watchdog heartbeat in seconds. (1<heartbeat<2046, default=30)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
iTCO_wdt:
heartbeat:
Watchdog heartbeat in seconds.
(2<heartbeat<39 (TCO v1) or 613 (TCO v2), default=30)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
iTCO_vendor_support:
vendorsupport:
iTCO vendor specific support mode, default=0 (none),
1=SuperMicro Pent3, 2=SuperMicro Pent4+, 911=Broken SMI BIOS
-------------------------------------------------
ib700wdt:
timeout:
Watchdog timeout in seconds. 0<= timeout <=30, default=30.
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
ibmasr:
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
imx2_wdt:
timeout:
Watchdog timeout in seconds (default 60 s)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
indydog:
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
iop_wdt:
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
it8712f_wdt:
margin:
Watchdog margin in seconds (default 60)
nowayout:
Disable watchdog shutdown on close
(default=kernel config parameter)
-------------------------------------------------
it87_wdt:
nogameport:
Forbid the activation of game port, default=0
nocir:
Forbid the use of CIR (workaround for some buggy setups); set to 1 if
system resets despite watchdog daemon running, default=0
exclusive:
Watchdog exclusive device open, default=1
timeout:
Watchdog timeout in seconds, default=60
testmode:
Watchdog test mode (1 = no reboot), default=0
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
ixp4xx_wdt:
heartbeat:
Watchdog heartbeat in seconds (default 60s)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
machzwd:
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
action:
after watchdog resets, generate:
0 = RESET(*) 1 = SMI 2 = NMI 3 = SCI
-------------------------------------------------
max63xx_wdt:
heartbeat:
Watchdog heartbeat period in seconds from 1 to 60, default 60
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
nodelay:
Force selection of a timeout setting without initial delay
(max6373/74 only, default=0)
-------------------------------------------------
mixcomwd:
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
mpc8xxx_wdt:
timeout:
Watchdog timeout in ticks. (0<timeout<65536, default=65535)
reset:
Watchdog Interrupt/Reset Mode. 0 = interrupt, 1 = reset
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
mv64x60_wdt:
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
ni903x_wdt:
timeout:
Initial watchdog timeout in seconds (0<timeout<516, default=60)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
nic7018_wdt:
timeout:
Initial watchdog timeout in seconds (0<timeout<464, default=80)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
omap_wdt:
timer_margin:
initial watchdog timeout (in seconds)
early_enable:
Watchdog is started on module insertion (default=0
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
orion_wdt:
heartbeat:
Initial watchdog heartbeat in seconds
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
pc87413_wdt:
io:
pc87413 WDT I/O port (default: io).
timeout:
Watchdog timeout in minutes (default=timeout).
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
pika_wdt:
heartbeat:
Watchdog heartbeats in seconds. (default = 15)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
pnx4008_wdt:
heartbeat:
Watchdog heartbeat period in seconds from 1 to 60, default 19
nowayout:
Set to 1 to keep watchdog running after device release
-------------------------------------------------
pnx833x_wdt:
timeout:
Watchdog timeout in Mhz. (68Mhz clock), default=2040000000 (30 seconds)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
start_enabled:
Watchdog is started on module insertion (default=1)
-------------------------------------------------
pseries-wdt:
action:
Action taken when watchdog expires: 0 (power off), 1 (restart),
2 (dump and restart). (default=1)
timeout:
Initial watchdog timeout in seconds. (default=60)
nowayout:
Watchdog cannot be stopped once started.
(default=kernel config parameter)
-------------------------------------------------
rc32434_wdt:
timeout:
Watchdog timeout value, in seconds (default=20)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
riowd:
riowd_timeout:
Watchdog timeout in minutes (default=1)
-------------------------------------------------
s3c2410_wdt:
tmr_margin:
Watchdog tmr_margin in seconds. (default=15)
tmr_atboot:
Watchdog is started at boot time if set to 1, default=0
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
soft_noboot:
Watchdog action, set to 1 to ignore reboots, 0 to reboot
debug:
Watchdog debug, set to >1 for debug, (default 0)
-------------------------------------------------
sa1100_wdt:
margin:
Watchdog margin in seconds (default 60s)
-------------------------------------------------
sb_wdog:
timeout:
Watchdog timeout in microseconds (max/default 8388607 or 8.3ish secs)
-------------------------------------------------
sbc60xxwdt:
wdt_stop:
SBC60xx WDT 'stop' io port (default 0x45)
wdt_start:
SBC60xx WDT 'start' io port (default 0x443)
timeout:
Watchdog timeout in seconds. (1<=timeout<=3600, default=30)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
sbc7240_wdt:
timeout:
Watchdog timeout in seconds. (1<=timeout<=255, default=30)
nowayout:
Disable watchdog when closing device file
-------------------------------------------------
sbc8360:
timeout:
Index into timeout table (0-63) (default=27 (60s))
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
sbc_epx_c3:
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
sbc_fitpc2_wdt:
margin:
Watchdog margin in seconds (default 60s)
nowayout:
Watchdog cannot be stopped once started
-------------------------------------------------
sbsa_gwdt:
timeout:
Watchdog timeout in seconds. (default 10s)
action:
Watchdog action at the first stage timeout,
set to 0 to ignore, 1 to panic. (default=0)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
sc1200wdt:
isapnp:
When set to 0 driver ISA PnP support will be disabled (default=1)
io:
io port
timeout:
range is 0-255 minutes, default is 1
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
sc520_wdt:
timeout:
Watchdog timeout in seconds. (1 <= timeout <= 3600, default=30)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
sch311x_wdt:
force_id:
Override the detected device ID
therm_trip:
Should a ThermTrip trigger the reset generator
timeout:
Watchdog timeout in seconds. 1<= timeout <=15300, default=60
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
scx200_wdt:
margin:
Watchdog margin in seconds
nowayout:
Disable watchdog shutdown on close
-------------------------------------------------
shwdt:
clock_division_ratio:
Clock division ratio. Valid ranges are from 0x5 (1.31ms)
to 0x7 (5.25ms). (default=7)
heartbeat:
Watchdog heartbeat in seconds. (1 <= heartbeat <= 3600, default=30
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
smsc37b787_wdt:
timeout:
range is 1-255 units, default is 60
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
softdog:
soft_margin:
Watchdog soft_margin in seconds.
(0 < soft_margin < 65536, default=60)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
soft_noboot:
Softdog action, set to 1 to ignore reboots, 0 to reboot
(default=0)
-------------------------------------------------
stmp3xxx_wdt:
heartbeat:
Watchdog heartbeat period in seconds from 1 to 4194304, default 19
-------------------------------------------------
tegra_wdt:
heartbeat:
Watchdog heartbeats in seconds. (default = 120)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
ts72xx_wdt:
timeout:
Watchdog timeout in seconds. (1 <= timeout <= 8, default=8)
nowayout:
Disable watchdog shutdown on close
-------------------------------------------------
twl4030_wdt:
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
txx9wdt:
timeout:
Watchdog timeout in seconds. (0<timeout<N, default=60)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
uniphier_wdt:
timeout:
Watchdog timeout in power of two seconds.
(1 <= timeout <= 128, default=64)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
w83627hf_wdt:
wdt_io:
w83627hf/thf WDT io port (default 0x2E)
timeout:
Watchdog timeout in seconds. 1 <= timeout <= 255, default=60.
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
w83877f_wdt:
timeout:
Watchdog timeout in seconds. (1<=timeout<=3600, default=30)
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
w83977f_wdt:
timeout:
Watchdog timeout in seconds (15..7635), default=45)
testmode:
Watchdog testmode (1 = no reboot), default=0
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
wafer5823wdt:
timeout:
Watchdog timeout in seconds. 1 <= timeout <= 255, default=60.
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
wdt285:
soft_margin:
Watchdog timeout in seconds (default=60)
-------------------------------------------------
wdt977:
timeout:
Watchdog timeout in seconds (60..15300, default=60)
testmode:
Watchdog testmode (1 = no reboot), default=0
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
wm831x_wdt:
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
wm8350_wdt:
nowayout:
Watchdog cannot be stopped once started
(default=kernel config parameter)
-------------------------------------------------
sun4v_wdt:
timeout_ms:
Watchdog timeout in milliseconds 1..180000, default=60000)
nowayout:
Watchdog cannot be stopped once started
