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path: root/drivers/thermal/of-thermal.c
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Diffstat (limited to 'drivers/thermal/of-thermal.c')
-rw-r--r--drivers/thermal/of-thermal.c41
1 files changed, 36 insertions, 5 deletions
diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
index 668fb1bde..b295b2b6c 100644
--- a/drivers/thermal/of-thermal.c
+++ b/drivers/thermal/of-thermal.c
@@ -58,6 +58,8 @@ struct __thermal_bind_params {
* @mode: current thermal zone device mode (enabled/disabled)
* @passive_delay: polling interval while passive cooling is activated
* @polling_delay: zone polling interval
+ * @slope: slope of the temperature adjustment curve
+ * @offset: offset of the temperature adjustment curve
* @ntrips: number of trip points
* @trips: an array of trip points (0..ntrips - 1)
* @num_tbps: number of thermal bind params
@@ -70,6 +72,8 @@ struct __thermal_zone {
enum thermal_device_mode mode;
int passive_delay;
int polling_delay;
+ int slope;
+ int offset;
/* trip data */
int ntrips;
@@ -227,7 +231,8 @@ static int of_thermal_bind(struct thermal_zone_device *thermal,
ret = thermal_zone_bind_cooling_device(thermal,
tbp->trip_id, cdev,
tbp->max,
- tbp->min);
+ tbp->min,
+ tbp->usage);
if (ret)
return ret;
}
@@ -581,7 +586,7 @@ static int thermal_of_populate_bind_params(struct device_node *np,
u32 prop;
/* Default weight. Usage is optional */
- __tbp->usage = 0;
+ __tbp->usage = THERMAL_WEIGHT_DEFAULT;
ret = of_property_read_u32(np, "contribution", &prop);
if (ret == 0)
__tbp->usage = prop;
@@ -715,7 +720,7 @@ static int thermal_of_populate_trip(struct device_node *np,
* @np parameter and fills the read data into a __thermal_zone data structure
* and return this pointer.
*
- * TODO: Missing properties to parse: thermal-sensor-names and coefficients
+ * TODO: Missing properties to parse: thermal-sensor-names
*
* Return: On success returns a valid struct __thermal_zone,
* otherwise, it returns a corresponding ERR_PTR(). Caller must
@@ -727,7 +732,7 @@ thermal_of_build_thermal_zone(struct device_node *np)
struct device_node *child = NULL, *gchild;
struct __thermal_zone *tz;
int ret, i;
- u32 prop;
+ u32 prop, coef[2];
if (!np) {
pr_err("no thermal zone np\n");
@@ -752,6 +757,20 @@ thermal_of_build_thermal_zone(struct device_node *np)
}
tz->polling_delay = prop;
+ /*
+ * REVIST: for now, the thermal framework supports only
+ * one sensor per thermal zone. Thus, we are considering
+ * only the first two values as slope and offset.
+ */
+ ret = of_property_read_u32_array(np, "coefficients", coef, 2);
+ if (ret == 0) {
+ tz->slope = coef[0];
+ tz->offset = coef[1];
+ } else {
+ tz->slope = 1;
+ tz->offset = 0;
+ }
+
/* trips */
child = of_get_child_by_name(np, "trips");
@@ -865,6 +884,8 @@ int __init of_parse_thermal_zones(void)
for_each_child_of_node(np, child) {
struct thermal_zone_device *zone;
struct thermal_zone_params *tzp;
+ int i, mask = 0;
+ u32 prop;
/* Check whether child is enabled or not */
if (!of_device_is_available(child))
@@ -891,8 +912,18 @@ int __init of_parse_thermal_zones(void)
/* No hwmon because there might be hwmon drivers registering */
tzp->no_hwmon = true;
+ if (!of_property_read_u32(child, "sustainable-power", &prop))
+ tzp->sustainable_power = prop;
+
+ for (i = 0; i < tz->ntrips; i++)
+ mask |= 1 << i;
+
+ /* these two are left for temperature drivers to use */
+ tzp->slope = tz->slope;
+ tzp->offset = tz->offset;
+
zone = thermal_zone_device_register(child->name, tz->ntrips,
- 0, tz,
+ mask, tz,
ops, tzp,
tz->passive_delay,
tz->polling_delay);