This patch uses the force reset(WDTRSTB) for triggering WDT reset for
restart callback. This method is faster compared to the overflow method
for triggering watchdog reset.
Signed-off-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
---
V2->v3:
* Patch reordering from patch 4->patch 2
* Updated the commit description.
V1->V2:
* Updated the commit description.
---
drivers/watchdog/rzg2l_wdt.c | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)
diff --git a/drivers/watchdog/rzg2l_wdt.c b/drivers/watchdog/rzg2l_wdt.c
index 96f2a018ab62..b02ecfff5299 100644
--- a/drivers/watchdog/rzg2l_wdt.c
+++ b/drivers/watchdog/rzg2l_wdt.c
@@ -21,8 +21,11 @@
#define WDTSET 0x04
#define WDTTIM 0x08
#define WDTINT 0x0C
+#define PECR 0x10
+#define PEEN 0x14
#define WDTCNT_WDTEN BIT(0)
#define WDTINT_INTDISP BIT(0)
+#define PEEN_FORCE_RST BIT(0)
#define WDT_DEFAULT_TIMEOUT 60U
@@ -116,15 +119,11 @@ static int rzg2l_wdt_restart(struct watchdog_device *wdev,
{
struct rzg2l_wdt_priv *priv = watchdog_get_drvdata(wdev);
- /* Reset the module before we modify any register */
- reset_control_reset(priv->rstc);
- pm_runtime_get_sync(wdev->parent);
-
- /* smallest counter value to reboot soon */
- rzg2l_wdt_write(priv, WDTSET_COUNTER_VAL(1), WDTSET);
+ /* Generate Reset (WDTRSTB) Signal */
+ rzg2l_wdt_write(priv, 0, PECR);
- /* Enable watchdog timer*/
- rzg2l_wdt_write(priv, WDTCNT_WDTEN, WDTCNT);
+ /* Force reset (WDTRSTB) */
+ rzg2l_wdt_write(priv, PEEN_FORCE_RST, PEEN);
return 0;
}
--
2.17.1
