1 files changed, 58 insertions, 0 deletions
diff --git a/drivers/thermal/gov_user_space.c b/drivers/thermal/gov_user_space.c
new file mode 100644
index 000000000000..ef95cf7d65ef
--- /dev/null
+++ b/drivers/thermal/gov_user_space.c
@@ -0,0 +1,58 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  user_space.c - A simple user space Thermal events notifier
+ *
+ *  Copyright (C) 2012 Intel Corp
+ *  Copyright (C) 2012 Durgadoss R <durgadoss.r@intel.com>
+ *
+ *  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/slab.h>
+#include <linux/thermal.h>
+
+#include "thermal_core.h"
+
+static int user_space_bind(struct thermal_zone_device *tz)
+{
+	pr_info_once("Consider using thermal netlink events interface\n");
+
+	return 0;
+}
+
+/**
+ * user_space_trip_crossed - Notify user space about trip crossing events
+ * @tz: thermal_zone_device
+ * @trip: trip point
+ * @upward: whether or not the trip has been crossed on the way up
+ *
+ * This function notifies the user space through UEvents.
+ */
+static void user_space_trip_crossed(struct thermal_zone_device *tz,
+				    const struct thermal_trip *trip,
+				    bool upward)
+{
+	char *thermal_prop[5];
+	int i;
+
+	lockdep_assert_held(&tz->lock);
+
+	thermal_prop[0] = kasprintf(GFP_KERNEL, "NAME=%s", tz->type);
+	thermal_prop[1] = kasprintf(GFP_KERNEL, "TEMP=%d", tz->temperature);
+	thermal_prop[2] = kasprintf(GFP_KERNEL, "TRIP=%d",
+				    thermal_zone_trip_id(tz, trip));
+	thermal_prop[3] = kasprintf(GFP_KERNEL, "EVENT=%d", tz->notify_event);
+	thermal_prop[4] = NULL;
+	kobject_uevent_env(&tz->device.kobj, KOBJ_CHANGE, thermal_prop);
+	for (i = 0; i < 4; ++i)
+		kfree(thermal_prop[i]);
+}
+
+static struct thermal_governor thermal_gov_user_space = {
+	.name		= "user_space",
+	.trip_crossed	= user_space_trip_crossed,
+	.bind_to_tz	= user_space_bind,
+};
+THERMAL_GOVERNOR_DECLARE(thermal_gov_user_space);