@@ -115,6 +115,25 @@ static int rzg2l_wdt_stop(struct watchdog_device *wdev)
return 0;
}
+static int rzg2l_wdt_set_timeout(struct watchdog_device *wdev, unsigned int timeout)
+{
+ struct rzg2l_wdt_priv *priv = watchdog_get_drvdata(wdev);
+
+ wdev->timeout = timeout;
+
+ /*
+ * If the watchdog is active, reset the module for updating the WDTSET
+ * register so that it is updated with new timeout values.
+ */
+ if (watchdog_active(wdev)) {
+ pm_runtime_put(wdev->parent);
+ reset_control_reset(priv->rstc);
+ rzg2l_wdt_start(wdev);
+ }
+
+ return 0;
+}
+
static int rzg2l_wdt_restart(struct watchdog_device *wdev,
unsigned long action, void *data)
{
@@ -151,6 +170,7 @@ static const struct watchdog_ops rzg2l_wdt_ops = {
.start = rzg2l_wdt_start,
.stop = rzg2l_wdt_stop,
.ping = rzg2l_wdt_ping,
+ .set_timeout = rzg2l_wdt_set_timeout,
.restart = rzg2l_wdt_restart,
};
This patch adds support for set_timeout callback. Once WDT is started, the WDT cycle setting register(WDTSET) can be updated only after issuing a module reset. Otherwise, it will ignore the writes and will hold the previous value. This patch updates the WDTSET register if it is active. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> --- V3->v4: * Updated commit description * Simplified the logic for updating timeout register, if wdt is active. v2->v3: * Patch reodering Patch 3 -> patch 4 * Updated commit description. V1->V2: * Updated commit description * Removed stop/start and started using reset() instead. * After reset, Start WDT based on watchdog timer state. --- drivers/watchdog/rzg2l_wdt.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)