thermal: streamline get_trend callbacks

The .get_trend callback in struct thermal_zone_device_ops has
the prototype:
int (*get_trend) (struct thermal_zone_device *, int,
enum thermal_trend *);
whereas the .get_trend callback in struct thermal_zone_of_device_ops
has:
int (*get_trend)(void *, long *);

Streamline both prototypes and add the trip argument to the OF callback
aswell and use enum thermal_trend * instead of an integer pointer.

While the OF prototype may be the better one, this should be decided at
framework level and not on OF level.

Signed-off-by: Sascha Hauer <[e-mail]>
Signed-off-by: Caesar Wang <[e-mail]>
Cc: Zhang Rui <[e-mail]>
Cc: Eduardo Valentin <[e-mail]>
Cc: [e-mail]
Reviewed-by: Keerthy <[e-mail]>
Signed-off-by: Eduardo Valentin <[e-mail]>
Signed-off-by: Zhang Rui <[e-mail]>

drivers/thermal/of-thermal.c

···
 				enum thermal_trend *trend)
 {
 	struct __thermal_zone *data = tz->devdata;
-	long dev_trend;
-	int r;
 
 	if (!data->ops->get_trend)
 		return -EINVAL;
 
-	r = data->ops->get_trend(data->sensor_data, &dev_trend);
-	if (r)
-		return r;
-
-	/* TODO: These intervals might have some thresholds, but in core code */
-	if (dev_trend > 0)
-		*trend = THERMAL_TREND_RAISING;
-	else if (dev_trend < 0)
-		*trend = THERMAL_TREND_DROPPING;
-	else
-		*trend = THERMAL_TREND_STABLE;
-
-	return 0;
+	return data->ops->get_trend(data->sensor_data, trip, trend);
 }
 
 static int of_thermal_bind(struct thermal_zone_device *thermal,

drivers/thermal/qcom/tsens.c

···
 	return tmdev->ops->get_temp(tmdev, s->id, temp);
 }
 
-static int tsens_get_trend(void *data, long *temp)
+static int tsens_get_trend(void *p, int trip, enum thermal_trend *trend)
 {
-	const struct tsens_sensor *s = data;
+	const struct tsens_sensor *s = p;
 	struct tsens_device *tmdev = s->tmdev;
 
 	if (tmdev->ops->get_trend)
-		return tmdev->ops->get_trend(tmdev, s->id, temp);
+		return  tmdev->ops->get_trend(tmdev, s->id, trend);
 
 	return -ENOTSUPP;
 }

drivers/thermal/qcom/tsens.h

···
 #define ONE_PT_CALIB2		0x2
 #define TWO_PT_CALIB		0x3
 
+#include <linux/thermal.h>
+
 struct tsens_device;
 
 struct tsens_sensor {
···
 	void (*disable)(struct tsens_device *);
 	int (*suspend)(struct tsens_device *);
 	int (*resume)(struct tsens_device *);
-	int (*get_trend)(struct tsens_device *, int, long *);
+	int (*get_trend)(struct tsens_device *, int, enum thermal_trend *);
 };
 
 /**

drivers/thermal/ti-soc-thermal/ti-thermal-common.c

···
 	return 0;
 }
 
-static int __ti_thermal_get_trend(void *p, long *trend)
+static int __ti_thermal_get_trend(void *p, int trip, enum thermal_trend *trend)
 {
 	struct ti_thermal_data *data = p;
 	struct ti_bandgap *bgp;
···
 	if (ret)
 		return ret;
 
-	*trend = tr;
-
-	return 0;
-}
-
-/* Get the temperature trend callback functions for thermal zone */
-static int ti_thermal_get_trend(struct thermal_zone_device *thermal,
-				int trip, enum thermal_trend *trend)
-{
-	int ret;
-	long tr;
-
-	ret = __ti_thermal_get_trend(thermal->devdata, &tr);
-	if (ret)
-		return ret;
-
 	if (tr > 0)
 		*trend = THERMAL_TREND_RAISING;
 	else if (tr < 0)
···
 		*trend = THERMAL_TREND_STABLE;
 
 	return 0;
+}
+
+/* Get the temperature trend callback functions for thermal zone */
+static int ti_thermal_get_trend(struct thermal_zone_device *thermal,
+				int trip, enum thermal_trend *trend)
+{
+	return __ti_thermal_get_trend(thermal->devdata, trip, trend);
 }
 
 /* Get critical temperature callback functions for thermal zone */

include/linux/thermal.h

···
  */
 struct thermal_zone_of_device_ops {
 	int (*get_temp)(void *, int *);
-	int (*get_trend)(void *, long *);
+	int (*get_trend)(void *, int, enum thermal_trend *);
 	int (*set_trips)(void *, int, int);
 	int (*set_emul_temp)(void *, int);
 	int (*set_trip_temp)(void *, int, int);