Aggregate thermal trip based on the trip points of the thermal zones
that use this sensor as the source.
Signed-off-by: Lina Iyer <ilina@xxxxxxxxxxxxxx>
---
drivers/thermal/of-thermal.c | 28 ++++++++++++++++++++++-
drivers/thermal/thermal_helpers.c | 37 ++++++++++++++++++-------------
include/linux/thermal.h | 4 ++++
3 files changed, 53 insertions(+), 16 deletions(-)
diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
index 06e581a37c67..6fb2eeb5b6cf 100644
--- a/drivers/thermal/of-thermal.c
+++ b/drivers/thermal/of-thermal.c
@@ -96,16 +96,42 @@ static int of_thermal_get_temp(struct thermal_zone_device *tz,
return sensor->ops->get_temp(sensor->sensor_data, temp);
}
+static void __of_thermal_agg_trip(struct thermal_sensor *sensor,
+ int *floor, int *ceil)
+{
+ int low, high;
+ int max_lo = INT_MIN;
+ int min_hi = INT_MAX;
+ struct thermal_zone_device *tz;
+
+ list_for_each_entry(tz, &sensor->tz_list, sensor_tzd) {
+ thermal_zone_get_trip(tz, &low, &high);
+ if (low > max_lo)
+ max_lo = low;
+ if (high < min_hi)
+ min_hi = high;
+ }
+
+ *floor = max_lo;
+ *ceil = min_hi;
+}
+
static int of_thermal_set_trips(struct thermal_zone_device *tz,
int low, int high)
{
struct __thermal_zone *data = tz->devdata;
struct thermal_sensor *sensor = data->sensor;
+ int ret;
if (!sensor || !sensor->ops->set_trips)
return -EINVAL;
- return sensor->ops->set_trips(sensor->sensor_data, low, high);
+ mutex_lock(&sensor->lock);
+ __of_thermal_agg_trip(sensor, &low, &high);
+ ret = sensor->ops->set_trips(sensor->sensor_data, low, high);
+ mutex_unlock(&sensor->lock);
+
+ return ret;
}
/**
diff --git a/drivers/thermal/thermal_helpers.c b/drivers/thermal/thermal_helpers.c
index f550fdee0f9b..d4fa125f8799 100644
--- a/drivers/thermal/thermal_helpers.c
+++ b/drivers/thermal/thermal_helpers.c
@@ -113,32 +113,39 @@ int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp)
}
EXPORT_SYMBOL_GPL(thermal_zone_get_temp);
-void thermal_zone_set_trips(struct thermal_zone_device *tz)
+
+void thermal_zone_get_trip(struct thermal_zone_device *tz, int *low, int *high)
{
- int low = -INT_MAX;
- int high = INT_MAX;
- int trip_temp, hysteresis;
- int i, ret;
+ int i, trip_low, trip_temp, hysteresis;
- mutex_lock(&tz->lock);
-
- if (!tz->ops->set_trips || !tz->ops->get_trip_hyst)
- goto exit;
+ *low = -INT_MAX;
+ *high = INT_MAX;
for (i = 0; i < tz->trips; i++) {
- int trip_low;
-
tz->ops->get_trip_temp(tz, i, &trip_temp);
tz->ops->get_trip_hyst(tz, i, &hysteresis);
trip_low = trip_temp - hysteresis;
- if (trip_low < tz->temperature && trip_low > low)
- low = trip_low;
+ if (trip_low < tz->temperature && trip_low > *low)
+ *low = trip_low;
- if (trip_temp > tz->temperature && trip_temp < high)
- high = trip_temp;
+ if (trip_temp > tz->temperature && trip_temp < *high)
+ *high = trip_temp;
}
+}
+
+void thermal_zone_set_trips(struct thermal_zone_device *tz)
+{
+ int low, high;
+ int ret;
+
+ mutex_lock(&tz->lock);
+
+ if (!tz->ops->set_trips || !tz->ops->get_trip_hyst)
+ goto exit;
+
+ thermal_zone_get_trip(tz, &low, &high);
/* No need to change trip points */
if (tz->prev_low_trip == low && tz->prev_high_trip == high)
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 09e1669a4919..000ae6a97678 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -443,6 +443,7 @@ int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int,
struct thermal_cooling_device *);
void thermal_zone_device_update(struct thermal_zone_device *,
enum thermal_notify_event);
+void thermal_zone_get_trip(struct thermal_zone_device *tz, int *low, int *high);
void thermal_zone_set_trips(struct thermal_zone_device *);
struct thermal_cooling_device *thermal_cooling_device_register(char *, void *,
@@ -496,6 +497,9 @@ static inline int thermal_zone_unbind_cooling_device(
static inline void thermal_zone_device_update(struct thermal_zone_device *tz,
enum thermal_notify_event event)
{ }
+static inline void thermal_zone_get_trip(struct thermal_zone_device *tz,
+ int *low, int *high)
+{ }
static inline void thermal_zone_set_trips(struct thermal_zone_device *tz)
{ }
static inline struct thermal_cooling_device *
--
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