thermal: of: implement .set_trips for device tree thermal zones

This patch implements .set_trips for device tree thermal zones.
As the hardware-tracked trip points is supported by thermal core patch[0].

patch[0]
"thermal: Add support for hardware-tracked trip points".

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Reviewed-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
Signed-off-by: Zhang Rui <rui.zhang@intel.com>

2 files changed, 23 insertions, 0 deletions

diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
index b8e509c60848..2d2a06f155e2 100644
--- a/drivers/thermal/of-thermal.c
+++ b/drivers/thermal/of-thermal.c
@@ -101,6 +101,17 @@ static int of_thermal_get_temp(struct thermal_zone_device *tz,
         return data->ops->get_temp(data->sensor_data, temp);
 }
 
+static int of_thermal_set_trips(struct thermal_zone_device *tz,
+                                int low, int high)
+{
+        struct __thermal_zone *data = tz->devdata;
+
+        if (!data->ops || !data->ops->set_trips)
+                return -EINVAL;
+
+        return data->ops->set_trips(data->sensor_data, low, high);
+}
+
 /**
  * of_thermal_get_ntrips - function to export number of available trip
  *                         points.
@@ -427,6 +438,14 @@ thermal_zone_of_add_sensor(struct device_node *zone,
 
         tzd->ops->get_temp = of_thermal_get_temp;
         tzd->ops->get_trend = of_thermal_get_trend;
+
+        /*
+         * The thermal zone core will calculate the window if they have set the
+         * optional set_trips pointer.
+         */
+        if (ops->set_trips)
+                tzd->ops->set_trips = of_thermal_set_trips;
+
         tzd->ops->set_emul_temp = of_thermal_set_emul_temp;
         mutex_unlock(&tzd->lock);
 
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 54cdfeaaedd4..20118b9ebeb7 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -340,6 +340,9 @@ struct thermal_genl_event {
  *
  * Optional:
  * @get_trend: a pointer to a function that reads the sensor temperature trend.
+ * @set_trips: a pointer to a function that sets a temperature window. When
+ *             this window is left the driver must inform the thermal core via
+ *             thermal_zone_device_update.
  * @set_emul_temp: a pointer to a function that sets sensor emulated
  *                 temperature.
  * @set_trip_temp: a pointer to a function that sets the trip temperature on
@@ -348,6 +351,7 @@ struct thermal_genl_event {
 struct thermal_zone_of_device_ops {
         int (*get_temp)(void *, int *);
         int (*get_trend)(void *, long *);
+        int (*set_trips)(void *, int, int);
         int (*set_emul_temp)(void *, int);
         int (*set_trip_temp)(void *, int, int);
 };