summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--Documentation/thermal/sysfs-api.txt16
-rw-r--r--drivers/thermal/thermal_core.c4
-rw-r--r--include/linux/thermal.h11
3 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt
index 7d44d7f1a71b..c1f6864a8c5d 100644
--- a/Documentation/thermal/sysfs-api.txt
+++ b/Documentation/thermal/sysfs-api.txt
@@ -190,6 +190,8 @@ Thermal zone device sys I/F, created once it's registered:
|---k_i: PID's integral term in the power allocator gov
|---k_d: PID's derivative term in the power allocator
|---integral_cutoff: Offset above which errors are accumulated
+ |---slope: Slope constant applied as linear extrapolation
+ |---offset: Offset constant applied as linear extrapolation
Thermal cooling device sys I/F, created once it's registered:
/sys/class/thermal/cooling_device[0-*]:
@@ -359,6 +361,20 @@ integral_cutoff
Documentation/thermal/power_allocator.txt
RW, Optional
+slope
+ The slope constant used in a linear extrapolation model
+ to determine a hotspot temperature based off the sensor's
+ raw readings. It is up to the device driver to determine
+ the usage of these values.
+ RW, Optional
+
+offset
+ The offset constant used in a linear extrapolation model
+ to determine a hotspot temperature based off the sensor's
+ raw readings. It is up to the device driver to determine
+ the usage of these values.
+ RW, Optional
+
*****************************
* Cooling device attributes *
*****************************
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 962de1847cc0..04659bfb888b 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -944,6 +944,8 @@ create_s32_tzp_attr(k_pu);
create_s32_tzp_attr(k_i);
create_s32_tzp_attr(k_d);
create_s32_tzp_attr(integral_cutoff);
+create_s32_tzp_attr(slope);
+create_s32_tzp_attr(offset);
#undef create_s32_tzp_attr
static struct device_attribute *dev_tzp_attrs[] = {
@@ -953,6 +955,8 @@ static struct device_attribute *dev_tzp_attrs[] = {
&dev_attr_k_i,
&dev_attr_k_d,
&dev_attr_integral_cutoff,
+ &dev_attr_slope,
+ &dev_attr_offset,
};
static int create_tzp_attrs(struct device *dev)
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 6bbe11c97cea..037e9df2f610 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -302,6 +302,17 @@ struct thermal_zone_params {
/* threshold below which the error is no longer accumulated */
s32 integral_cutoff;
+
+ /*
+ * @slope: slope of a linear temperature adjustment curve.
+ * Used by thermal zone drivers.
+ */
+ int slope;
+ /*
+ * @offset: offset of a linear temperature adjustment curve.
+ * Used by thermal zone drivers (default 0).
+ */
+ int offset;
};
struct thermal_genl_event {