On iWave's boards iwg20d and iwg22d the only way to reboot the system is
by means of the watchdog.
This patch adds a restart handler to rwdt_ops, and also makes sure we
keep its priority to the lowest level, in order to not override other
more effective handlers.
Signed-off-by: Fabrizio Castro <fabrizio.cas...@bp.renesas.com>
Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasunda...@bp.renesas.com>
Reviewed-by: Guenter Roeck <li...@roeck-us.net>
Reviewed-by: Wolfram Sang <wsa+rene...@sang-engineering.com>
---
v6->v7:
* fix changelog
drivers/watchdog/renesas_wdt.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/drivers/watchdog/renesas_wdt.c b/drivers/watchdog/renesas_wdt.c
index 9fc4c78..d287854 100644
--- a/drivers/watchdog/renesas_wdt.c
+++ b/drivers/watchdog/renesas_wdt.c
@@ -108,6 +108,16 @@ static unsigned int rwdt_get_timeleft(struct
watchdog_device *wdev)
return DIV_BY_CLKS_PER_SEC(priv, 65536 - val);
}
+static int rwdt_restart(struct watchdog_device *wdev, unsigned long action,
+ void *data)
+{
+ struct rwdt_priv *priv = watchdog_get_drvdata(wdev);
+
+ rwdt_start(wdev);
+ rwdt_write(priv, 0xffff, RWTCNT);
+ return 0;
+}
+
static const struct watchdog_info rwdt_ident = {
.options = WDIOF_MAGICCLOSE | WDIOF_KEEPALIVEPING | WDIOF_SETTIMEOUT,
.identity = "Renesas WDT Watchdog",
@@ -119,6 +129,7 @@ static const struct watchdog_ops rwdt_ops = {
.stop = rwdt_stop,
.ping = rwdt_init_timeout,
.get_timeleft = rwdt_get_timeleft,
+ .restart = rwdt_restart,
};
static int rwdt_probe(struct platform_device *pdev)
@@ -177,6 +188,7 @@ static int rwdt_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, priv);
watchdog_set_drvdata(&priv->wdev, priv);
watchdog_set_nowayout(&priv->wdev, nowayout);
+ watchdog_set_restart_priority(&priv->wdev, 0);
/* This overrides the default timeout only if DT configuration was
found */
ret = watchdog_init_timeout(&priv->wdev, 0, &pdev->dev);
--
2.7.4
