[PATCH 1/2] driver: watchdog: reset watchdog in designware_wdt_stop() function

[Meng.Li at windriver.com <Meng.Li@windriver.com>]

From: MengLi <meng.li@windriver.com>

In uboot command line environment, watchdog is not able to be
stopped with below commands:
SOCFPGA_STRATIX10 # wdt dev watchdog at ffd00200
SOCFPGA_STRATIX10 # wdt stop
Refer to watchdog driver in linux kernel, it is also need to reset
watchdog after disable it so that the disable action takes effect.

Signed-off-by: Meng Li <Meng.Li@windriver.com>
---
 drivers/watchdog/designware_wdt.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/drivers/watchdog/designware_wdt.c b/drivers/watchdog/designware_wdt.c
index 12f09a7a39..63e89d38c4 100644
--- a/drivers/watchdog/designware_wdt.c
+++ b/drivers/watchdog/designware_wdt.c
@@ -92,10 +92,27 @@ static int designware_wdt_reset(struct udevice *dev)
 static int designware_wdt_stop(struct udevice *dev)
 {
 	struct designware_wdt_priv *priv = dev_get_priv(dev);
+	__maybe_unused int ret;
 
 	designware_wdt_reset(dev);
 	writel(0, priv->base + DW_WDT_CR);
 
+#if CONFIG_IS_ENABLED(DM_RESET)
+	struct reset_ctl_bulk resets;
+
+	ret = reset_get_bulk(dev, &resets);
+	if (ret)
+		return ret;
+
+	ret = reset_assert_bulk(&resets);
+	if (ret)
+		return ret;
+
+	ret = reset_deassert_bulk(&resets);
+	if (ret)
+		return ret;
+#endif
+
 	return 0;
 }
 
-- 
2.17.1