path: root/drivers/watchdog/Kconfig
diff options
authorAhmad Fatoum <>2021-04-16 08:24:36 +0200
committerSascha Hauer <>2021-05-03 14:07:21 +0200
commit263d3c2105edec00e1e3e67770eb0a870567dbc4 (patch)
tree434e93307b0eb357e1e5833128bdfeab1e971556 /drivers/watchdog/Kconfig
parentffdb6a435e7ed5576f37d6cea14157d6ce51e16b (diff)
watchdog: add support for Intel TCO watchdog timer
Variants of the iTCO are integrated into many Intel southbridges. They are most often accessed via PCI. Add a driver for the variant found in the q35 QEMU machine. It should be straight forward to extend the itco_chipset_info array to support more variants in future as the need arises. To test, use: qemu-system-x86_64 -M q35 -global ICH9-LPC.noreboot=false The last option corresponds to a pin strap option, which can't be influenced from within the VM. Signed-off-by: Ahmad Fatoum <> Link: Signed-off-by: Sascha Hauer <>
Diffstat (limited to 'drivers/watchdog/Kconfig')
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index df85a227ac..b785181c59 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -124,4 +124,21 @@ config GPIO_WATCHDOG
If you say yes here you get support for watchdog device
controlled through GPIO-line.
+config ITCO_WDT
+ bool "Intel TCO Timer/Watchdog"
+ depends on X86
+ depends on PCI
+ help
+ Hardware driver for the intel TCO timer based watchdog devices.
+ These drivers are included in the Intel 82801 I/O Controller
+ Hub family (from ICH0 up to ICH10) and in the Intel 63xxESB
+ controller hub.
+ The TCO (Total Cost of Ownership) timer is a watchdog timer
+ that will reboot the machine after its second expiration.
+ On some motherboards the driver may fail to reset the chipset's
+ NO_REBOOT flag which prevents the watchdog from rebooting the
+ machine.