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@xxxxxxxxxxxx>
---
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
