102 lines
3.8 KiB
Diff
102 lines
3.8 KiB
Diff
From 4a7069a32c99a81950de035535b0a064dcceaeba Mon Sep 17 00:00:00 2001
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From: Rajendra Nayak <rnayak@codeaurora.org>
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Date: Thu, 5 May 2016 14:21:42 +0530
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Subject: [PATCH] thermal: core: export apis to get slope and offset
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Add apis for platform thermal drivers to query for slope and offset
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attributes, which might be needed for temperature calculations.
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Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
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Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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Signed-off-by: Zhang Rui <rui.zhang@intel.com>
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---
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Documentation/thermal/sysfs-api.txt | 12 ++++++++++++
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drivers/thermal/thermal_core.c | 30 ++++++++++++++++++++++++++++++
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include/linux/thermal.h | 8 ++++++++
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3 files changed, 50 insertions(+)
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--- a/Documentation/thermal/sysfs-api.txt
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+++ b/Documentation/thermal/sysfs-api.txt
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@@ -72,6 +72,18 @@ temperature) and throttle appropriate de
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It deletes the corresponding entry form /sys/class/thermal folder and
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unbind all the thermal cooling devices it uses.
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+1.1.7 int thermal_zone_get_slope(struct thermal_zone_device *tz)
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+
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+ This interface is used to read the slope attribute value
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+ for the thermal zone device, which might be useful for platform
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+ drivers for temperature calculations.
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+
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+1.1.8 int thermal_zone_get_offset(struct thermal_zone_device *tz)
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+
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+ This interface is used to read the offset attribute value
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+ for the thermal zone device, which might be useful for platform
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+ drivers for temperature calculations.
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+
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1.2 thermal cooling device interface
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1.2.1 struct thermal_cooling_device *thermal_cooling_device_register(char *name,
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void *devdata, struct thermal_cooling_device_ops *)
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--- a/drivers/thermal/thermal_core.c
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+++ b/drivers/thermal/thermal_core.c
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@@ -2061,6 +2061,36 @@ exit:
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}
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EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name);
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+/**
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+ * thermal_zone_get_slope - return the slope attribute of the thermal zone
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+ * @tz: thermal zone device with the slope attribute
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+ *
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+ * Return: If the thermal zone device has a slope attribute, return it, else
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+ * return 1.
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+ */
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+int thermal_zone_get_slope(struct thermal_zone_device *tz)
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+{
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+ if (tz && tz->tzp)
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+ return tz->tzp->slope;
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+ return 1;
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+}
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+EXPORT_SYMBOL_GPL(thermal_zone_get_slope);
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+
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+/**
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+ * thermal_zone_get_offset - return the offset attribute of the thermal zone
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+ * @tz: thermal zone device with the offset attribute
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+ *
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+ * Return: If the thermal zone device has a offset attribute, return it, else
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+ * return 0.
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+ */
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+int thermal_zone_get_offset(struct thermal_zone_device *tz)
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+{
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+ if (tz && tz->tzp)
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+ return tz->tzp->offset;
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+ return 0;
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+}
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+EXPORT_SYMBOL_GPL(thermal_zone_get_offset);
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+
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#ifdef CONFIG_NET
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static const struct genl_multicast_group thermal_event_mcgrps[] = {
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{ .name = THERMAL_GENL_MCAST_GROUP_NAME, },
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--- a/include/linux/thermal.h
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+++ b/include/linux/thermal.h
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@@ -432,6 +432,8 @@ thermal_of_cooling_device_register(struc
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void thermal_cooling_device_unregister(struct thermal_cooling_device *);
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struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name);
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int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
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+int thermal_zone_get_slope(struct thermal_zone_device *tz);
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+int thermal_zone_get_offset(struct thermal_zone_device *tz);
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int get_tz_trend(struct thermal_zone_device *, int);
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struct thermal_instance *get_thermal_instance(struct thermal_zone_device *,
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@@ -489,6 +491,12 @@ static inline struct thermal_zone_device
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static inline int thermal_zone_get_temp(
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struct thermal_zone_device *tz, int *temp)
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{ return -ENODEV; }
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+static inline int thermal_zone_get_slope(
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+ struct thermal_zone_device *tz)
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+{ return -ENODEV; }
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+static inline int thermal_zone_get_offset(
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+ struct thermal_zone_device *tz)
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+{ return -ENODEV; }
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static inline int get_tz_trend(struct thermal_zone_device *tz, int trip)
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{ return -ENODEV; }
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static inline struct thermal_instance *
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