2 files changed, 30 insertions, 0 deletions

diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c
index ed5dee744c74..7428c2b965bb 100644
--- a/drivers/platform/chrome/cros_ec_proto.c
+++ b/drivers/platform/chrome/cros_ec_proto.c
@@ -494,3 +494,23 @@ int cros_ec_get_next_event(struct cros_ec_device *ec_dev)
                 return get_keyboard_state_event(ec_dev);
 }
 EXPORT_SYMBOL(cros_ec_get_next_event);
+
+u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev)
+{
+        u32 host_event;
+
+        BUG_ON(!ec_dev->mkbp_event_supported);
+
+        if (ec_dev->event_data.event_type != EC_MKBP_EVENT_HOST_EVENT)
+                return 0;
+
+        if (ec_dev->event_size != sizeof(host_event)) {
+                dev_warn(ec_dev->dev, "Invalid host event size\n");
+                return 0;
+        }
+
+        host_event = get_unaligned_le32(&ec_dev->event_data.data.host_event);
+
+        return host_event;
+}
+EXPORT_SYMBOL(cros_ec_get_host_event);
diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
index 28baee63eaf6..b61b2e013698 100644
--- a/include/linux/mfd/cros_ec.h
+++ b/include/linux/mfd/cros_ec.h
@@ -300,6 +300,16 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev);
  */
 int cros_ec_get_next_event(struct cros_ec_device *ec_dev);
 
+/**
+ * cros_ec_get_host_event - Return a mask of event set by the EC.
+ *
+ * When MKBP is supported, when the EC raises an interrupt,
+ * We collect the events raised and call the functions in the ec notifier.
+ *
+ * This function is a helper to know which events are raised.
+ */
+u32 cros_ec_get_host_event(struct cros_ec_device *ec_dev);
+
 /* sysfs stuff */
 extern struct attribute_group cros_ec_attr_group;
 extern struct attribute_group cros_ec_lightbar_attr_group;