Add restart handler for SP805 watchdog so that the driver can be
used to reboot the system.
Signed-off-by: Jongsung Kim <neidhard.kim@xxxxxxx>
Cc: Guenter Roeck <linux@xxxxxxxxxxxx>
---
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
--
2.7.4
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