[PATCH 5.19 613/717] platform/chrome: cros_ec: Notify the PM of wake events during resume

[Greg Kroah-Hartman]

From: Jameson Thies <jthies@xxxxxxxxxx>

[ Upstream commit 8edd2752b0aa498b3a61f3caee8f79f7e0567fad ]

cros_ec_handle_event in the cros_ec driver can notify the PM of wake
events. When a device is suspended, cros_ec_handle_event will not check
MKBP events. Instead, received MKBP events are checked during resume by
cros_ec_report_events_during_suspend. But
cros_ec_report_events_during_suspend cannot notify the PM if received
events are wake events, causing wake events to not be reported if
received while the device is suspended.

Update cros_ec_report_events_during_suspend to notify the PM of wake
events during resume by calling pm_wakeup_event.

Signed-off-by: Jameson Thies <jthies@xxxxxxxxxx>
Reviewed-by: Prashant Malani <pmalani@xxxxxxxxxxxx>
Reviewed-by: Benson Leung <bleung@xxxxxxxxxxxx>
Signed-off-by: Tzung-Bi Shih <tzungbi@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220913204954.2931042-1-jthies@xxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 drivers/platform/chrome/cros_ec.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/chrome/cros_ec.c b/drivers/platform/chrome/cros_ec.c
index 00381490dd3e..4b0934ef7714 100644
--- a/drivers/platform/chrome/cros_ec.c
+++ b/drivers/platform/chrome/cros_ec.c
@@ -352,10 +352,16 @@ EXPORT_SYMBOL(cros_ec_suspend);
 
 static void cros_ec_report_events_during_suspend(struct cros_ec_device *ec_dev)
 {
+	bool wake_event;
+
 	while (ec_dev->mkbp_event_supported &&
-	       cros_ec_get_next_event(ec_dev, NULL, NULL) > 0)
+	       cros_ec_get_next_event(ec_dev, &wake_event, NULL) > 0) {
 		blocking_notifier_call_chain(&ec_dev->event_notifier,
 					     1, ec_dev);
+
+		if (wake_event && device_may_wakeup(ec_dev->dev))
+			pm_wakeup_event(ec_dev->dev, 0);
+	}
 }
 
 /**
-- 
2.35.1