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authorJongsung Kim <neidhard.kim@lge.com>2018-05-04 15:05:03 +0900
committerWim Van Sebroeck <wim@linux-watchdog.org>2018-05-21 21:24:41 +0200
commit6c5c0d48b686cca0d3bbd23f66e871323deffd67 (patch)
tree12e302aefe256f80b95669ec166229e01507b592 /drivers/watchdog
parent665f94423a74759a2b6daf6a5c827e6e9cd8a3a2 (diff)
downloadlinux-6c5c0d48b686cca0d3bbd23f66e871323deffd67.tar.bz2
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>
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/sp805_wdt.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c
index 03805bc5d67a..9849db0743a7 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
@@ -230,6 +243,7 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id)
spin_lock_init(&wdt->lock);
watchdog_set_nowayout(&wdt->wdd, nowayout);
watchdog_set_drvdata(&wdt->wdd, wdt);
+ watchdog_set_restart_priority(&wdt->wdd, 128);
wdt_setload(&wdt->wdd, DEFAULT_TIMEOUT);
ret = watchdog_register_device(&wdt->wdd);