watchdog: sp805: add restart handler
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> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
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@ -121,6 +121,18 @@ static unsigned int wdt_timeleft(struct watchdog_device *wdd)
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return div_u64(load, rate);
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}
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static int
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wdt_restart(struct watchdog_device *wdd, unsigned long mode, void *cmd)
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{
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struct sp805_wdt *wdt = watchdog_get_drvdata(wdd);
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writel_relaxed(0, wdt->base + WDTCONTROL);
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writel_relaxed(0, wdt->base + WDTLOAD);
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writel_relaxed(INT_ENABLE | RESET_ENABLE, wdt->base + WDTCONTROL);
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return 0;
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}
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static int wdt_config(struct watchdog_device *wdd, bool ping)
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{
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struct sp805_wdt *wdt = watchdog_get_drvdata(wdd);
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@ -197,6 +209,7 @@ static const struct watchdog_ops wdt_ops = {
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.ping = wdt_ping,
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.set_timeout = wdt_setload,
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.get_timeleft = wdt_timeleft,
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.restart = wdt_restart,
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};
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static int
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@ -230,6 +243,7 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id)
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spin_lock_init(&wdt->lock);
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watchdog_set_nowayout(&wdt->wdd, nowayout);
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watchdog_set_drvdata(&wdt->wdd, wdt);
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watchdog_set_restart_priority(&wdt->wdd, 128);
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wdt_setload(&wdt->wdd, DEFAULT_TIMEOUT);
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ret = watchdog_register_device(&wdt->wdd);
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