Messages in this thread | | | Subject | Re: [PATCH v2] watchdog: sp805: add restart handler | From | Guenter Roeck <> | Date | Wed, 2 May 2018 06:21:57 -0700 |
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On 05/02/2018 12:59 AM, Jongsung Kim wrote: > Add restart handler for SP805 watchdog so that the driver can be > used to reboot the system. > > Signed-off-by: Jongsung Kim <neidhard.kim@lge.com> > Cc: Guenter Roeck <linux@roeck-us.net> > --- > drivers/watchdog/sp805_wdt.c | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c > index 03805bc..969369e 100644 > --- a/drivers/watchdog/sp805_wdt.c > +++ b/drivers/watchdog/sp805_wdt.c > @@ -121,6 +121,18 @@ static unsigned int wdt_timeleft(struct watchdog_device *wdd) > return div_u64(load, rate); > } > > +static int > +wdt_restart(struct watchdog_device *wdd, unsigned long mode, void *cmd) > +{ > + struct sp805_wdt *wdt = watchdog_get_drvdata(wdd); > + > + writel_relaxed(0, wdt->base + WDTCONTROL); > + writel_relaxed(0, wdt->base + WDTLOAD); > + writel_relaxed(INT_ENABLE | RESET_ENABLE, wdt->base + WDTCONTROL); > + > + return 0; > +} > + > static int wdt_config(struct watchdog_device *wdd, bool ping) > { > struct sp805_wdt *wdt = watchdog_get_drvdata(wdd); > @@ -197,6 +209,7 @@ static const struct watchdog_ops wdt_ops = { > .ping = wdt_ping, > .set_timeout = wdt_setload, > .get_timeleft = wdt_timeleft, > + .restart = wdt_restart, > }; > > static int > Please add the restart priority
watchdog_set_restart_priority(&wdt->wdd, 128);
before registering the watchdog.
Thanks, Guenter
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