watchdog: aspeed: add nowayout support
Subsystems (2)
PATCH 1/1 watchdog: aspeed: add nowayout support
Add support for not stopping the watchdog
when the userspace application quits. At
closing of the device, the driver cannot
determine if this was a graceful closure
or if the app crashed. If the support
of nowayout on this driver, the system integrator
can select the behaviour by setting the kernel
config and enabling it.
Cc Wim Van Sebroeck <[email protected]> (maintainer:WATCHDOG DEVICE DRIVERS)
Cc Guenter Roeck <[email protected]> (maintainer:WATCHDOG DEVICE DRIVERS)
Cc Joel Stanley <[email protected]> (supporter:ARM/ASPEED MACHINE SUPPORT)
Cc Andrew Jeffery <[email protected]> (reviewer:ARM/ASPEED MACHINE SUPPORT)
Cc linux-watchdog at vger.kernel.org (open list:WATCHDOG DEVICE DRIVERS)
Cc linux-arm-kernel at lists.infradead.org (moderated list:ARM/ASPEED MACHINE SUPPORT)
Cc linux-aspeed at lists.ozlabs.org (moderated list:ARM/ASPEED MACHINE SUPPORT)
Cc linux-kernel at vger.kernel.org (open list)
Signed-off-by Eduardo Valentin <[email protected]>
Signed-off-by Eduardo Valentin <[email protected]>
--- drivers/watchdog/aspeed_wdt.c | 7 +++++++ 1 file changed, 7 insertions(+)
drivers/watchdog/aspeed_wdt.c +7 -0
@@ -13,6 +13,11 @@#include <linux/platform_device.h> #include <linux/watchdog.h> +static bool nowayout =WATCHDOG_NOWAYOUT ; +module_param (nowayout, bool,0 ); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" + __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); +struct aspeed_wdt {struct watchdog_device wdd;void __iomem *base;
@@ -266,6 +271,8 @@ static int aspeed_wdt_probe(struct platform_device *pdev) wdt->wdd.timeout =WDT_DEFAULT_TIMEOUT ;watchdog_init_timeout (&wdt->wdd,0 , dev); +watchdog_set_nowayout (&wdt->wdd, nowayout); + np = dev->of_node; ofdid =of_match_node (aspeed_wdt_of_table, np);
Signature · 1 line
2.17.1
Quoted 9 lines · Eduardo Valentin
Add support for not stopping the watchdog
when the userspace application quits. At
closing of the device, the driver cannot
determine if this was a graceful closure
or if the app crashed. If the support
of nowayout on this driver, the system integrator
can select the behaviour by setting the kernel
config and enabling it.
Quoted 10 lines
Cc Wim Van Sebroeck <[email protected]> (maintainer:WATCHDOG DEVICE DRIVERS)Cc Guenter Roeck <[email protected]> (maintainer:WATCHDOG DEVICE DRIVERS)Cc Joel Stanley <[email protected]> (supporter:ARM/ASPEED MACHINE SUPPORT)Cc Andrew Jeffery <[email protected]> (reviewer:ARM/ASPEED MACHINE SUPPORT)Cc linux-watchdog at vger.kernel.org (open list:WATCHDOG DEVICE DRIVERS)Cc linux-arm-kernel at lists.infradead.org (moderated list:ARM/ASPEED MACHINE SUPPORT)Cc linux-aspeed at lists.ozlabs.org (moderated list:ARM/ASPEED MACHINE SUPPORT)Cc linux-kernel at vger.kernel.org (open list)Signed-off-by Eduardo Valentin <[email protected]>Signed-off-by Eduardo Valentin <[email protected]>
Reviewed-by Guenter Roeck <[email protected]>
Quoted 29 lines
--- drivers/watchdog/aspeed_wdt.c | 7 +++++++ 1 file changed, 7 insertions(+)drivers/watchdog/aspeed_wdt.c +7
-0@@ -13,6 +13,11 @@#include <linux/platform_device.h> #include <linux/watchdog.h> +static bool nowayout =WATCHDOG_NOWAYOUT ; +module_param (nowayout, bool,0 ); +MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started (default=" + __MODULE_STRING(WATCHDOG_NOWAYOUT) ")"); +struct aspeed_wdt {struct watchdog_device wdd;void __iomem *base;@@ -266,6 +271,8 @@ static int aspeed_wdt_probe(struct platform_device *pdev) wdt->wdd.timeout =WDT_DEFAULT_TIMEOUT ;watchdog_init_timeout (&wdt->wdd,0 , dev); +watchdog_set_nowayout (&wdt->wdd, nowayout); + np = dev->of_node; ofdid =of_match_node (aspeed_wdt_of_table, np);