return -EINVAL;
}
+static int thermal_get_trend(struct thermal_zone_device *thermal,
+ int trip, enum thermal_trend *trend)
+{
+ struct acpi_thermal *tz = thermal->devdata;
+ enum thermal_trip_type type;
+ int i;
+
+ if (thermal_get_trip_type(thermal, trip, &type))
+ return -EINVAL;
+
+ /* Only PASSIVE trip points need TREND */
+ if (type != THERMAL_TRIP_PASSIVE)
+ return -EINVAL;
+
+ /*
+ * tz->temperature has already been updated by generic thermal layer,
+ * before this callback being invoked
+ */
+ i = (tz->trips.passive.tc1 * (tz->temperature - tz->last_temperature))
+ + (tz->trips.passive.tc2
+ * (tz->temperature - tz->trips.passive.temperature));
+
+ if (i > 0)
+ *trend = THERMAL_TREND_RAISING;
+ else if (i < 0)
+ *trend = THERMAL_TREND_DROPPING;
+ else
+ *trend = THERMAL_TREND_STABLE;
+ return 0;
+}
+
+
static int thermal_notify(struct thermal_zone_device *thermal, int trip,
enum thermal_trip_type trip_type)
{
.get_trip_type = thermal_get_trip_type,
.get_trip_temp = thermal_get_trip_temp,
.get_crit_temp = thermal_get_crit_temp,
+ .get_trend = thermal_get_trend,
.notify = thermal_notify,
};