[PATCH 5/5] serial: 8250: omap: Set wakeup pinctrl on suspend

[Markus Schneider-Pargmann <msp@baylibre.com>]

To enable the serial driver and it's pin to be a wakeup source in
suspend to ram states, select the wakeup pinctrl state on suspend and
restore the default pinctrl state on resume.

Signed-off-by: Markus Schneider-Pargmann <msp@baylibre.com>
---
 drivers/tty/serial/8250/8250_omap.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c
index 617a421a1396..61f056c4e78e 100644
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -1663,6 +1663,13 @@ static int omap8250_suspend(struct device *dev)
 	struct generic_pm_domain *genpd = pd_to_genpd(dev->pm_domain);
 	int err = 0;
 
+	err = omap8250_select_wakeup_pinctrl(dev, priv);
+	if (err) {
+		dev_err(dev, "Failed to select wakeup pinctrl, aborting suspend %pe\n",
+			ERR_PTR(err));
+		return err;
+	}
+
 	serial8250_suspend_port(priv->line);
 
 	err = pm_runtime_resume_and_get(dev);
@@ -1696,6 +1703,13 @@ static int omap8250_resume(struct device *dev)
 	struct generic_pm_domain *genpd = pd_to_genpd(dev->pm_domain);
 	int err;
 
+	err = pinctrl_select_default_state(dev);
+	if (err) {
+		dev_err(dev, "Failed to select default pinctrl state on resume: %pe\n",
+			ERR_PTR(err));
+		return err;
+	}
+
 	if (uart_console(&up->port) && console_suspend_enabled) {
 		if (console_suspend_enabled) {
 			err = pm_runtime_force_resume(dev);
-- 
2.43.0