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linux/drivers/watchdog
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Javier Martinez Canillas 882dec1ff1 watchdog: s3c2410_wdt: Add max and min timeout values 
The watchdog maximum timeout value is determined by the number of bits
for the interval timer counter, its source clock frequency, the number
of bits of the prescaler and maximum divider value.

This can be calculated with the following equation:

max_timeout = counter / (freq / (max_prescale + 1) / max_divider)

Setting a maximum timeout value will allow the watchdog core to refuse
user-space calls to the WDIOC_SETTIMEOUT ioctl that sets not supported
timeout values.

For example, systemd tries to set a timeout of 10 minutes on reboot to
ensure that the machine will be rebooted even if a reboot failed. This
leads to the following error message on an Exynos5422 Odroid XU4 board:

[  147.986045] s3c2410-wdt 101d0000.watchdog: timeout 600 too big

Reported-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2016-03-16 21:08:09 +01:00
..
acquirewdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
advantechwdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
alim1535_wdt.c
watchdog: remove DEFINE_PCI_DEVICE_TABLE macro
2014-01-28 19:07:07 +01:00
alim7101_wdt.c
watchdog: alim7101: register restart handler with kernel restart handler
2014-09-26 00:00:32 -07:00
ar7_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
asm9260_wdt.c
watchdog: asm9260: remove __init and __exit annotations
2016-01-11 22:48:05 +01:00
at32ap700x_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
at91rm9200_wdt.c
Merge git://www.linux-watchdog.org/linux-watchdog
2015-09-11 15:12:59 -07:00
at91sam9_wdt.c
watchdog: at91sam9: get and use slow clock
2015-09-09 21:38:52 +02:00
at91sam9_wdt.h
watchdog: add a driver to support SAMA5D4 watchdog timer
2015-09-09 21:38:29 +02:00
ath79_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
atlas7_wdt.c
watchdog: atlas7: add watchdog driver of CSRatlas7
2015-12-28 22:09:50 +01:00
bcm47xx_wdt.c
watchdog: Add 'action' and 'data' parameters to restart handler callback
2016-03-01 15:36:35 +01:00
bcm63xx_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
bcm2835_wdt.c
watchdog: bcm2835_wdt: Drop log message if watchdog is stopped
2015-12-28 23:04:04 +01:00
bcm7038_wdt.c
watchdog: Watchdog driver for Broadcom Set-Top Box
2015-10-27 16:12:02 +01:00
bcm_kona_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
bfin_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
booke_wdt.c
watchdog: booke_wdt: Use infrastructure to check timeout limits
2015-09-09 21:34:34 +02:00
cadence_wdt.c
watchdog: cadence_wdt: use to_platform_device()
2015-12-27 21:15:34 +01:00
coh901327_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
cpu5wdt.c
watchdog: delete non-required instances of include <linux/init.h>
2014-03-31 13:22:45 +02:00
cpwd.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
da9052_wdt.c
watchdog: da9052_wdt: Drop reference counting
2015-12-29 20:36:03 +01:00
da9055_wdt.c
watchdog: da9055_wdt: Drop reference counting
2015-12-29 20:36:04 +01:00
da9062_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
da9063_wdt.c
watchdog: Add 'action' and 'data' parameters to restart handler callback
2016-03-01 15:36:35 +01:00
davinci_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
diag288_wdt.c
watchdog: diag288: Stop re-using watchdog core internal flags
2015-12-29 20:36:02 +01:00
digicolor_wdt.c
watchdog: Add 'action' and 'data' parameters to restart handler callback
2016-03-01 15:36:35 +01:00
dw_wdt.c
watchdog: dw_wdt: fix signedness bug in dw_wdt_top_in_seconds()
2015-12-27 21:04:50 +01:00
ebc-c384_wdt.c
watchdog: Add watchdog timer support for the WinSystems EBC-C384
2016-03-01 16:25:47 +01:00
ep93xx_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
eurotechwdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
f71808e_wdt.c
watchdog: f71808e_wdt: Add support for Jetway JNF99 motherboard
2012-07-23 12:46:38 +02:00
gef_wdt.c
watchdog: Fix module autoload for OF platform driver
2015-09-28 10:56:01 +02:00
geodewdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
gpio_wdt.c
watchdog: gpio: Do not use device pointer from struct watchdog_device
2015-12-28 23:04:05 +01:00
hpwdt.c
watchdog: hpwdt: HP rebranding
2015-12-28 22:09:12 +01:00
i6300esb.c
watchdog: delete non-required instances of include <linux/init.h>
2014-03-31 13:22:45 +02:00
ib700wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
ibmasr.c
watchdog: fix checkpatch warnings and error
2014-03-31 13:31:06 +02:00
ie6xx_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
imgpdc_wdt.c
watchdog: Add 'action' and 'data' parameters to restart handler callback
2016-03-01 15:36:35 +01:00
imx2_wdt.c
watchdog: Add 'action' and 'data' parameters to restart handler callback
2016-03-01 15:36:35 +01:00
indydog.c
watchdog: indydog: Simplify indydog_{start,stop}
2014-03-31 13:26:31 +02:00
intel_scu_watchdog.c
watchdog: intel_scu_watchdog: Remove unused variable
2014-03-31 13:26:56 +02:00
intel_scu_watchdog.h
watchdog: Use pr_<fmt> and pr_<level>
2012-03-27 19:59:26 +02:00
intel-mid_wdt.c
watchdog: intel-mid: add Magic Closure flag
2015-10-28 22:58:32 +01:00
iop_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
it87_wdt.c
watchdog: it87_wdt: add IT8783 ID
2015-02-17 21:32:08 +01:00
it8712f_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
iTCO_vendor_support.c
watchdog: Convert iTCO_wdt driver to mfd model
2012-05-09 17:20:09 +02:00
iTCO_vendor.h
watchdog: Convert iTCO_wdt driver to mfd model
2012-05-09 17:20:09 +02:00
iTCO_wdt.c
watchdog: iTCO_wdt: Add support for TCO on Intel Sunrisepoint
2015-08-11 15:03:52 +01:00
ixp4xx_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
jz4740_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
Kconfig
Watchdog: introduce ARM SBSA watchdog driver
2016-03-16 21:07:31 +01:00
kempld_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
ks8695_wdt.c
char: make misc_deregister a void function
2015-08-05 10:35:49 -07:00
lantiq_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
lpc18xx_wdt.c
watchdog: Add 'action' and 'data' parameters to restart handler callback
2016-03-01 15:36:35 +01:00
m54xx_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
machzwd.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
Makefile
Watchdog: introduce ARM SBSA watchdog driver
2016-03-16 21:07:31 +01:00
max63xx_wdt.c
watchdog: max63xx: make module's license marker match the header
2016-01-31 16:51:56 +01:00
mena21_wdt.c
watchdog: mena21: Do not use device pointer from struct watchdog_device
2015-12-28 23:04:06 +01:00
menf21bmc_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
meson_wdt.c
watchdog: Add 'action' and 'data' parameters to restart handler callback
2016-03-01 15:36:35 +01:00
mixcomwd.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
moxart_wdt.c
watchdog: Add 'action' and 'data' parameters to restart handler callback
2016-03-01 15:36:35 +01:00
mpc8xxx_wdt.c
watchdog: mpc8xxx: use better error code when watchdog cannot be enabled
2015-09-09 21:37:51 +02:00
mt7621_wdt.c
watchdog: add MT7621 watchdog support
2016-01-09 17:45:28 +01:00
mtk_wdt.c
watchdog: Add 'action' and 'data' parameters to restart handler callback
2016-03-01 15:36:35 +01:00
mtx-1_wdt.c
watchdog: delete non-required instances of include <linux/init.h>
2014-03-31 13:22:45 +02:00
mv64x60_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
ni903x_wdt.c
watchdog: ni903x_wdt: Add NI 903x/913x watchdog driver
2016-03-01 16:25:39 +01:00
nuc900_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
nv_tco.c
watchdog: (nv_tco) add support for MCP79
2015-09-09 21:34:24 +02:00
nv_tco.h
…
octeon-wdt-main.c
watchdog: octeon: use fixed length string for register names
2015-04-22 15:28:40 +02:00
octeon-wdt-nmi.S
…
of_xilinx_wdt.c
watchdog: xilinx: Remove .owner field for driver
2014-10-20 20:43:42 +02:00
omap_wdt.c
watchdog: omap: don't disable the timer when it should be enabled early
2015-12-27 21:09:40 +01:00
omap_wdt.h
watchdog: omap_wdt: implement get_timeleft
2015-06-22 15:54:35 +02:00
orion_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
pc87413_wdt.c
watchdog: fix checkpatch warnings and error
2014-03-31 13:31:06 +02:00
pcwd_pci.c
watchdog: remove DEFINE_PCI_DEVICE_TABLE macro
2014-01-28 19:07:07 +01:00
pcwd_usb.c
watchdog: pcwd_usb: fix compilation warning
2016-01-31 16:52:15 +01:00
pcwd.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
pika_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
pnx833x_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
pnx4008_wdt.c
watchdog: pnx4008: make global wdt_clk static
2015-11-23 08:59:07 +01:00
qcom-wdt.c
watchdog: Add 'action' and 'data' parameters to restart handler callback
2016-03-01 15:36:35 +01:00
rc32434_wdt.c
watchdog: rc32434_wdt: fix ioctl error handling
2016-03-01 15:29:42 +01:00
rdc321x_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
retu_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
riowd.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
rn5t618_wdt.c
watchdog: add driver for Ricoh RN5T618 watchdog
2014-10-20 20:55:02 +02:00
rt2880_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
s3c2410_wdt.c
watchdog: s3c2410_wdt: Add max and min timeout values
2016-03-16 21:08:09 +01:00
sa1100_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sama5d4_wdt.c
watchdog: add a driver to support SAMA5D4 watchdog timer
2015-09-09 21:38:29 +02:00
sb_wdog.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sbc60xxwdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sbc7240_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sbc8360.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sbc_epx_c3.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sbc_fitpc2_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
sbsa_gwdt.c
Watchdog: introduce ARM SBSA watchdog driver
2016-03-16 21:07:31 +01:00
sc520_wdt.c
watchdog: sc520_wdt: Remove unused variable
2014-03-31 13:27:34 +02:00
sc1200wdt.c
sc1200_wdt: Fix oops
2013-12-10 08:48:15 +01:00
sch311x_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
scx200_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
shwdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
sirfsoc_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
smsc37b787_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
softdog.c
watchdog: refuse to unload softdog module when its timer is running
2015-12-27 21:02:21 +01:00
sp805_wdt.c
watchdog: sp805: ping fails to abort wdt reset
2016-01-31 16:52:08 +01:00
sp5100_tco.c
sp5100_tco: fix the device check for SB800 and later chipsets
2015-12-27 20:42:55 +01:00
sp5100_tco.h
watchdog: sp5100_tco: Set the AcpiMmioSel bitmask value to 1 instead of 2
2013-03-22 23:21:55 +01:00
st_lpc_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
stmp3xxx_rtc_wdt.c
watchdog: stmp3xxx: Remove unused variables
2016-01-11 21:51:28 +01:00
sunxi_wdt.c
watchdog: Add 'action' and 'data' parameters to restart handler callback
2016-03-01 15:36:35 +01:00
tangox_wdt.c
watchdog: tangox: Print info message using pointer to platform device
2015-12-28 23:04:04 +01:00
tegra_wdt.c
watchdog: tegra: Stop watchdog first if restarting
2015-11-23 08:59:45 +01:00
ts72xx_wdt.c
char: make misc_deregister a void function
2015-08-05 10:35:49 -07:00
ts4800_wdt.c
watchdog: ts4800: add driver for TS-4800 watchdog
2015-12-28 22:29:35 +01:00
twl4030_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
txx9wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
ux500_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
via_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
w83627hf_wdt.c
watchdog: w83627hf: Added NCT6102D support.
2016-03-01 14:22:05 +01:00
w83877f_wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
w83977f_wdt.c
watchdog: w83977f_wdt: underflow in wdt_set_timeout()
2015-11-23 08:59:30 +01:00
wafer5823wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
watchdog_core.c
watchdog: Add 'action' and 'data' parameters to restart handler callback
2016-03-01 15:36:35 +01:00
watchdog_core.h
watchdog: Create watchdog device in watchdog_dev.c
2015-12-29 20:36:01 +01:00
watchdog_dev.c
watchdog: Drop pointer to watchdog device from struct watchdog_device
2016-01-11 21:53:59 +01:00
wd501p.h
…
wdrtas.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
wdt285.c
watchdog: wdt285: Fix variable type
2014-03-31 13:28:20 +02:00
wdt977.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
wdt_pci.c
watchdog: delete non-required instances of include <linux/init.h>
2014-03-31 13:22:45 +02:00
wdt.c
watchdog: Get rid of MODULE_ALIAS_MISCDEV statements
2013-11-17 19:38:13 +01:00
wm831x_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
wm8350_wdt.c
Watchdog: Fix parent of watchdog_devices
2015-09-09 21:39:22 +02:00
xen_wdt.c
watchdog: drop owner assignment from platform_drivers
2014-10-20 16:21:56 +02:00
ziirave_wdt.c
watchdog: ziirave_wdt: Rename "trigger" reset reason "hw watchdog"
2016-03-01 15:30:16 +01:00