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authorFu Wei <fu.wei@linaro.org>2016-02-29 16:46:50 +0800
committerWim Van Sebroeck <wim@iguana.be>2016-03-16 21:07:31 +0100
commit57d2caaabfc744692e36ff83b508d7c52c70e36f (patch)
treee8bfe028f514203fadb5b9271077a3638b73890c /drivers/watchdog/Kconfig
parent2fc94b5f229a5d9d1db7fd91d0a4808cfeb915f5 (diff)
downloadlinux-57d2caaabfc744692e36ff83b508d7c52c70e36f.tar.bz2
Watchdog: introduce ARM SBSA watchdog driver
According to Server Base System Architecture (SBSA) specification, the SBSA Generic Watchdog has two stage timeouts: the first signal (WS0) is for alerting the system by interrupt, the second one (WS1) is a real hardware reset. More details about the hardware specification of this device: ARM DEN0029B - Server Base System Architecture (SBSA) This driver can operate ARM SBSA Generic Watchdog as a single stage watchdog or a two stages watchdog, it's set up by the module parameter "action". In the single stage mode, when the timeout is reached, your system will be reset by WS1. The first signal (WS0) is ignored. In the two stages mode, when the timeout is reached, the first signal (WS0) will trigger panic. If the system is getting into trouble and cannot be reset by panic or restart properly by the kdump kernel(if supported), then the second stage (as long as the first stage) will be reached, system will be reset by WS1. This function can help administrator to backup the system context info by panic console output or kdump. This driver bases on linux kernel watchdog framework, so it can get timeout from module parameter and FDT at the driver init stage. Signed-off-by: Fu Wei <fu.wei@linaro.org> Reviewed-by: Graeme Gregory <graeme.gregory@linaro.org> Tested-by: Pratyush Anand <panand@redhat.com> Acked-by: Timur Tabi <timur@codeaurora.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Tested-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
Diffstat (limited to 'drivers/watchdog/Kconfig')
-rw-r--r--drivers/watchdog/Kconfig20
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 938f9205f828..3fca65e418c9 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -202,6 +202,26 @@ config ARM_SP805_WATCHDOG
ARM Primecell SP805 Watchdog timer. This will reboot your system when
the timeout is reached.
+config ARM_SBSA_WATCHDOG
+ tristate "ARM SBSA Generic Watchdog"
+ depends on ARM64
+ depends on ARM_ARCH_TIMER
+ select WATCHDOG_CORE
+ help
+ ARM SBSA Generic Watchdog has two stage timeouts:
+ the first signal (WS0) is for alerting the system by interrupt,
+ the second one (WS1) is a real hardware reset.
+ More details: ARM DEN0029B - Server Base System Architecture (SBSA)
+
+ This driver can operate ARM SBSA Generic Watchdog as a single stage
+ or a two stages watchdog, it depends on the module parameter "action".
+
+ Note: the maximum timeout in the two stages mode is half of that in
+ the single stage mode.
+
+ To compile this driver as module, choose M here: The module
+ will be called sbsa_gwdt.
+
config ASM9260_WATCHDOG
tristate "Alphascale ASM9260 watchdog"
depends on MACH_ASM9260