commit 33d04d0fdba9fae18c7d58364643d2c606a43dba upstream.

Both rzg2l_wdt_probe() and rzg2l_wdt_start() calls reset_control_
deassert() which results in a reset control imbalance.

This patch fixes reset control imbalance by removing reset_control_
deassert() from rzg2l_wdt_start() and replaces reset_control_assert with
reset_control_reset in rzg2l_wdt_stop() as watchdog module can be stopped
only by a module reset. This change will allow us to restart WDT after
stop() by configuring WDT timeout and enable registers.

Fixes: 2cbc5cd0b55fa2 ("watchdog: Add Watchdog Timer driver for RZ/G2L")
Signed-off-by: Biju Das <biju.das.jz@...>
Reviewed-by: Geert Uytterhoeven <geert+renesas@...>
Reviewed-by: Guenter Roeck <linux@...>
Link: https://lore.kernel.org/r/20220225175320.11041-5-biju.das.jz@bp.renesas.com
Signed-off-by: Guenter Roeck <linux@...>
Signed-off-by: Wim Van Sebroeck <wim@...>
Signed-off-by: Biju Das <biju.das.jz@...>
---
drivers/watchdog/rzg2l_wdt.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/watchdog/rzg2l_wdt.c b/drivers/watchdog/rzg2l_wdt.c
index 48dfe6e5e64f..88274704b260 100644
--- a/drivers/watchdog/rzg2l_wdt.c
+++ b/drivers/watchdog/rzg2l_wdt.c
@@ -88,7 +88,6 @@ static int rzg2l_wdt_start(struct watchdog_device *wdev)
{
struct rzg2l_wdt_priv *priv = watchdog_get_drvdata(wdev);

- reset_control_deassert(priv->rstc);
pm_runtime_get_sync(wdev->parent);

/* Initialize time out */
@@ -108,7 +107,7 @@ static int rzg2l_wdt_stop(struct watchdog_device *wdev)
struct rzg2l_wdt_priv *priv = watchdog_get_drvdata(wdev);

pm_runtime_put(wdev->parent);
- reset_control_assert(priv->rstc);
+ reset_control_reset(priv->rstc);

return 0;
}
--
2.25.1