summaryrefslogtreecommitdiffstats
path: root/drivers/watchdog/Kconfig
diff options
context:
space:
mode:
authorDavid Daney <ddaney@caviumnetworks.com>2010-07-24 10:16:05 -0700
committerRalf Baechle <ralf@linux-mips.org>2010-08-05 13:26:22 +0100
commit4c076fb41ac93bc0cbd55f2a731cc31337804acb (patch)
tree679bfb3a2177a9ffa9b07be44903f44418b84bd4 /drivers/watchdog/Kconfig
parent96ffa02d219f50a52e0482ad85130858c61efc63 (diff)
downloadop-kernel-dev-4c076fb41ac93bc0cbd55f2a731cc31337804acb.zip
op-kernel-dev-4c076fb41ac93bc0cbd55f2a731cc31337804acb.tar.gz
WATCHDOG: Add watchdog driver for OCTEON SOCs
The OCTEON is a MIPS64 based SOC family with an on chip watchdog unit. The driver is split into two source files one for the C code and one for assembly. Assembly is needed to handle the NMI and then print the machine state before the reboot is triggered. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Cc: Wim Van Sebroeck <wim@iguana.be> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Cc: Tony Lindgren <tony@atomide.com> Cc: Marc Zyngier <maz@misterjones.org> Cc: Thierry Reding <thierry.reding@avionic-design.de> Cc: Sam Ravnborg <sam@ravnborg.org> To: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org, Patchwork: https://patchwork.linux-mips.org/patch/1503/ Signed-off-by: Wim Van Sebroeck <wim@iguana.be> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> create mode 100644 drivers/watchdog/octeon-wdt-main.c create mode 100644 drivers/watchdog/octeon-wdt-nmi.S
Diffstat (limited to 'drivers/watchdog/Kconfig')
-rw-r--r--drivers/watchdog/Kconfig18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index afcfacc..b04b184 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -875,6 +875,24 @@ config TXX9_WDT
help
Hardware driver for the built-in watchdog timer on TXx9 MIPS SoCs.
+config OCTEON_WDT
+ tristate "Cavium OCTEON SOC family Watchdog Timer"
+ depends on CPU_CAVIUM_OCTEON
+ default y
+ select EXPORT_UASM if OCTEON_WDT = m
+ help
+ Hardware driver for OCTEON's on chip watchdog timer.
+ Enables the watchdog for all cores running Linux. It
+ installs a NMI handler and pokes the watchdog based on an
+ interrupt. On first expiration of the watchdog, the
+ interrupt handler pokes it. The second expiration causes an
+ NMI that prints a message. The third expiration causes a
+ global soft reset.
+
+ When userspace has /dev/watchdog open, no poking is done
+ from the first interrupt, it is then only poked when the
+ device is written.
+
# PARISC Architecture
# POWERPC Architecture
OpenPOWER on IntegriCloud