Thermal: Remove tc1/tc2 in generic thermal layer.

Remove tc1/tc2 in generic thermal layer.
.get_trend() callback starts to take effect from this patch.

bug 1059470

Change-Id: I69ea5306c9e76b0dae8eb6ad4b89335068e78f9b
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
Reviewed-by: Rafael J. Wysocki <rjw@sisk.pl>
Reviewed-by: Valentin, Eduardo <eduardo.valentin@ti.com>
Reviewed-on: http://git-master/r/159966
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Joshua Primero <jprimero@nvidia.com>
Tested-by: Joshua Primero <jprimero@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Diwakar Tundlam <dtundlam@nvidia.com>

2 files changed, 8 insertions, 20 deletions

diff --git a/drivers/thermal/spear_thermal.c b/drivers/thermal/spear_thermal.c
index 69a55d46aaa6..b55840add3ed 100644
--- a/drivers/thermal/spear_thermal.c
+++ b/drivers/thermal/spear_thermal.c
@@ -148,7 +148,7 @@ static int spear_thermal_probe(struct platform_device *pdev)
 	writel_relaxed(stdev->flags, stdev->thermal_base);
 
 	spear_thermal = thermal_zone_device_register("spear_thermal", 0, 0,
-				stdev, &ops, 0, 0, 0, 0);
+				stdev, &ops, 0, 0);
 	if (IS_ERR(spear_thermal)) {
 		dev_err(&pdev->dev, "thermal zone device is NULL\n");
 		ret = PTR_ERR(spear_thermal);
diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c
index 07b1add0930e..db76fffa36bd 100644
--- a/drivers/thermal/thermal_sys.c
+++ b/drivers/thermal/thermal_sys.c
@@ -335,9 +335,6 @@ passive_store(struct device *dev, struct device_attribute *attr,
 		tz->passive_delay = 0;
 	}
 
-	tz->tc1 = 1;
-	tz->tc2 = 1;
-
 	tz->forced_passive = state;
 
 	thermal_zone_device_update(tz);
@@ -718,13 +715,12 @@ static void thermal_zone_device_set_polling(struct thermal_zone_device *tz,
 static void thermal_zone_device_passive(struct thermal_zone_device *tz,
 					int temp, int trip_temp, int trip)
 {
-	int trend = 0;
+	enum thermal_trend trend;
 	struct thermal_cooling_device_instance *instance;
 	struct thermal_cooling_device *cdev;
 	long state, max_state;
 
-	if (!tz->ops->get_trend ||
-	    tz->ops->get_trend(tz, trip, (enum thermal_trend *)&trend)) {
+	if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) {
 		/*
 		 * compare the current temperature and previous temperature
 		 * to get the thermal trend, if no special requirement
@@ -747,11 +743,8 @@ static void thermal_zone_device_passive(struct thermal_zone_device *tz,
 	if (temp >= trip_temp) {
 		tz->passive = true;
 
-		trend = (tz->tc1 * (temp - tz->last_temperature)) +
-			(tz->tc2 * (temp - trip_temp));
-
 		/* Heating up? */
-		if (trend > 0) {
+		if (trend == THERMAL_TREND_RAISING) {
 			list_for_each_entry(instance, &tz->cooling_devices,
 					    node) {
 				if (instance->trip != trip)
@@ -762,7 +755,7 @@ static void thermal_zone_device_passive(struct thermal_zone_device *tz,
 				if (state++ < max_state)
 					cdev->ops->set_cur_state(cdev, state);
 			}
-		} else if (trend < 0) { /* Cooling off? */
+		} else if (trend == THERMAL_TREND_DROPPING) { /* Cooling off? */
 			list_for_each_entry(instance, &tz->cooling_devices,
 					    node) {
 				if (instance->trip != trip)
@@ -1305,8 +1298,6 @@ static void remove_trip_attrs(struct thermal_zone_device *tz)
  * @mask:	a bit string indicating the writeablility of trip points
  * @devdata:	private device data
  * @ops:	standard thermal zone device callbacks
- * @tc1:	thermal coefficient 1 for passive calculations
- * @tc2:	thermal coefficient 2 for passive calculations
  * @passive_delay: number of milliseconds to wait between polls when
  *		   performing passive cooling
  * @polling_delay: number of milliseconds to wait between polls when checking
@@ -1314,13 +1305,12 @@ static void remove_trip_attrs(struct thermal_zone_device *tz)
  *		   driven systems)
  *
  * thermal_zone_device_unregister() must be called when the device is no
- * longer needed. The passive cooling formula uses tc1 and tc2 as described in
- * section 11.1.5.1 of the ACPI specification 3.0.
+ * longer needed. The passive cooling depends on the .get_trend() return value.
  */
-struct thermal_zone_device *thermal_zone_device_register(char *type,
+struct thermal_zone_device *thermal_zone_device_register(const char *type,
 	int trips, int mask, void *devdata,
 	const struct thermal_zone_device_ops *ops,
-	int tc1, int tc2, int passive_delay, int polling_delay)
+	int passive_delay, int polling_delay)
 {
 	struct thermal_zone_device *tz;
 	struct thermal_cooling_device *pos;
@@ -1356,8 +1346,6 @@ struct thermal_zone_device *thermal_zone_device_register(char *type,
 	tz->device.class = &thermal_class;
 	tz->devdata = devdata;
 	tz->trips = trips;
-	tz->tc1 = tc1;
-	tz->tc2 = tc2;
 	tz->passive_delay = passive_delay;
 	tz->polling_delay = polling_delay;