[RFC PATCH 3/4] thermal:core:Add genetlink notifications for monitoring falling temperature

[Thara Gopinath]

Add notification calls for trip type THERMAL_TRIP_COLD when temperature
crosses the trip point in either direction.

Signed-off-by: Thara Gopinath <thara.gopin...@linaro.org>
---
 drivers/thermal/thermal_core.c | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 750a89f0c20a..e2302ca1cd3b 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -429,12 +429,21 @@ static void handle_thermal_trip(struct 
thermal_zone_device *tz, int trip)
                tz->ops->get_trip_hyst(tz, trip, &hyst);
 
        if (tz->last_temperature != THERMAL_TEMP_INVALID) {
-               if (tz->last_temperature < trip_temp &&
-                   tz->temperature >= trip_temp)
-                       thermal_notify_tz_trip_up(tz->id, trip);
-               if (tz->last_temperature >= trip_temp &&
-                   tz->temperature < (trip_temp - hyst))
-                       thermal_notify_tz_trip_down(tz->id, trip);
+               if (type == THERMAL_TRIP_COLD) {
+                       if (tz->last_temperature > trip_temp &&
+                           tz->temperature <= trip_temp)
+                               thermal_notify_tz_trip_down(tz->id, trip);
+                       if (tz->last_temperature <= trip_temp &&
+                           tz->temperature > (trip_temp + hyst))
+                               thermal_notify_tz_trip_up(tz->id, trip);
+               } else {
+                       if (tz->last_temperature < trip_temp &&
+                           tz->temperature >= trip_temp)
+                               thermal_notify_tz_trip_up(tz->id, trip);
+                       if (tz->last_temperature >= trip_temp &&
+                           tz->temperature < (trip_temp - hyst))
+                               thermal_notify_tz_trip_down(tz->id, trip);
+               }
        }
 
        if (type == THERMAL_TRIP_CRITICAL || type == THERMAL_TRIP_HOT)
-- 
2.25.1