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authorRajendra Nayak <rnayak@codeaurora.org>2016-05-05 14:21:42 +0530
committerZhang Rui <rui.zhang@intel.com>2016-09-27 14:02:16 +0800
commit4a7069a32c99a81950de035535b0a064dcceaeba (patch)
treeb65912d14e0cd5650a7d1e0cdc5270176e2c6f90
parent5e6703bd2d83548998848865cb9a9a795f31a311 (diff)
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thermal: core: export apis to get slope and offset
Add apis for platform thermal drivers to query for slope and offset attributes, which might be needed for temperature calculations. Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
-rw-r--r--Documentation/thermal/sysfs-api.txt12
-rw-r--r--drivers/thermal/thermal_core.c30
-rw-r--r--include/linux/thermal.h8
3 files changed, 50 insertions, 0 deletions
diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt
index efc3f3d293c4..755476ea3fda 100644
--- a/Documentation/thermal/sysfs-api.txt
+++ b/Documentation/thermal/sysfs-api.txt
@@ -140,6 +140,18 @@ temperature) and throttle appropriate devices.
Normally this function will not need to be called and the resource
management code will ensure that the resource is freed.
+1.1.7 int thermal_zone_get_slope(struct thermal_zone_device *tz)
+
+ This interface is used to read the slope attribute value
+ for the thermal zone device, which might be useful for platform
+ drivers for temperature calculations.
+
+1.1.8 int thermal_zone_get_offset(struct thermal_zone_device *tz)
+
+ This interface is used to read the offset attribute value
+ for the thermal zone device, which might be useful for platform
+ drivers for temperature calculations.
+
1.2 thermal cooling device interface
1.2.1 struct thermal_cooling_device *thermal_cooling_device_register(char *name,
void *devdata, struct thermal_cooling_device_ops *)
diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index e2fc6161dded..8728cc615452 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -2069,6 +2069,36 @@ exit:
}
EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name);
+/**
+ * thermal_zone_get_slope - return the slope attribute of the thermal zone
+ * @tz: thermal zone device with the slope attribute
+ *
+ * Return: If the thermal zone device has a slope attribute, return it, else
+ * return 1.
+ */
+int thermal_zone_get_slope(struct thermal_zone_device *tz)
+{
+ if (tz && tz->tzp)
+ return tz->tzp->slope;
+ return 1;
+}
+EXPORT_SYMBOL_GPL(thermal_zone_get_slope);
+
+/**
+ * thermal_zone_get_offset - return the offset attribute of the thermal zone
+ * @tz: thermal zone device with the offset attribute
+ *
+ * Return: If the thermal zone device has a offset attribute, return it, else
+ * return 0.
+ */
+int thermal_zone_get_offset(struct thermal_zone_device *tz)
+{
+ if (tz && tz->tzp)
+ return tz->tzp->offset;
+ return 0;
+}
+EXPORT_SYMBOL_GPL(thermal_zone_get_offset);
+
#ifdef CONFIG_NET
static const struct genl_multicast_group thermal_event_mcgrps[] = {
{ .name = THERMAL_GENL_MCAST_GROUP_NAME, },
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index ee517bef0db0..707d7353c28b 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -435,6 +435,8 @@ thermal_of_cooling_device_register(struct device_node *np, char *, void *,
void thermal_cooling_device_unregister(struct thermal_cooling_device *);
struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name);
int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
+int thermal_zone_get_slope(struct thermal_zone_device *tz);
+int thermal_zone_get_offset(struct thermal_zone_device *tz);
int get_tz_trend(struct thermal_zone_device *, int);
struct thermal_instance *get_thermal_instance(struct thermal_zone_device *,
@@ -492,6 +494,12 @@ static inline struct thermal_zone_device *thermal_zone_get_zone_by_name(
static inline int thermal_zone_get_temp(
struct thermal_zone_device *tz, int *temp)
{ return -ENODEV; }
+static inline int thermal_zone_get_slope(
+ struct thermal_zone_device *tz)
+{ return -ENODEV; }
+static inline int thermal_zone_get_offset(
+ struct thermal_zone_device *tz)
+{ return -ENODEV; }
static inline int get_tz_trend(struct thermal_zone_device *tz, int trip)
{ return -ENODEV; }
static inline struct thermal_instance *