target/linux/generic/pending-4.4/086-0002-thermal-core-export-apis-to-get-slope-and-offset.patch

   1 From 4a7069a32c99a81950de035535b0a064dcceaeba Mon Sep 17 00:00:00 2001
   2 From: Rajendra Nayak <rnayak@codeaurora.org>
   3 Date: Thu, 5 May 2016 14:21:42 +0530
   4 Subject: [PATCH] thermal: core: export apis to get slope and offset
   5
   6 Add apis for platform thermal drivers to query for slope and offset
   7 attributes, which might be needed for temperature calculations.
   8
   9 Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
  10 Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
  11 Signed-off-by: Zhang Rui <rui.zhang@intel.com>
  12 ---
  13  Documentation/thermal/sysfs-api.txt | 12 ++++++++++++
  14  drivers/thermal/thermal_core.c      | 30 ++++++++++++++++++++++++++++++
  15  include/linux/thermal.h             |  8 ++++++++
  16  3 files changed, 50 insertions(+)
  17
  18 --- a/Documentation/thermal/sysfs-api.txt
  19 +++ b/Documentation/thermal/sysfs-api.txt
  20 @@ -72,6 +72,18 @@ temperature) and throttle appropriate de
  21      It deletes the corresponding entry form /sys/class/thermal folder and
  22      unbind all the thermal cooling devices it uses.
  23
  24 +1.1.7 int thermal_zone_get_slope(struct thermal_zone_device *tz)
  25 +
  26 +       This interface is used to read the slope attribute value
  27 +       for the thermal zone device, which might be useful for platform
  28 +       drivers for temperature calculations.
  29 +
  30 +1.1.8 int thermal_zone_get_offset(struct thermal_zone_device *tz)
  31 +
  32 +       This interface is used to read the offset attribute value
  33 +       for the thermal zone device, which might be useful for platform
  34 +       drivers for temperature calculations.
  35 +
  36  1.2 thermal cooling device interface
  37  1.2.1 struct thermal_cooling_device *thermal_cooling_device_register(char *name,
  38                 void *devdata, struct thermal_cooling_device_ops *)
  39 --- a/drivers/thermal/thermal_core.c
  40 +++ b/drivers/thermal/thermal_core.c
  41 @@ -2061,6 +2061,36 @@ exit:
  42  }
  43  EXPORT_SYMBOL_GPL(thermal_zone_get_zone_by_name);
  44
  45 +/**
  46 + * thermal_zone_get_slope - return the slope attribute of the thermal zone
  47 + * @tz: thermal zone device with the slope attribute
  48 + *
  49 + * Return: If the thermal zone device has a slope attribute, return it, else
  50 + * return 1.
  51 + */
  52 +int thermal_zone_get_slope(struct thermal_zone_device *tz)
  53 +{
  54 +       if (tz && tz->tzp)
  55 +               return tz->tzp->slope;
  56 +       return 1;
  57 +}
  58 +EXPORT_SYMBOL_GPL(thermal_zone_get_slope);
  59 +
  60 +/**
  61 + * thermal_zone_get_offset - return the offset attribute of the thermal zone
  62 + * @tz: thermal zone device with the offset attribute
  63 + *
  64 + * Return: If the thermal zone device has a offset attribute, return it, else
  65 + * return 0.
  66 + */
  67 +int thermal_zone_get_offset(struct thermal_zone_device *tz)
  68 +{
  69 +       if (tz && tz->tzp)
  70 +               return tz->tzp->offset;
  71 +       return 0;
  72 +}
  73 +EXPORT_SYMBOL_GPL(thermal_zone_get_offset);
  74 +
  75  #ifdef CONFIG_NET
  76  static const struct genl_multicast_group thermal_event_mcgrps[] = {
  77         { .name = THERMAL_GENL_MCAST_GROUP_NAME, },
  78 --- a/include/linux/thermal.h
  79 +++ b/include/linux/thermal.h
  80 @@ -432,6 +432,8 @@ thermal_of_cooling_device_register(struc
  81  void thermal_cooling_device_unregister(struct thermal_cooling_device *);
  82  struct thermal_zone_device *thermal_zone_get_zone_by_name(const char *name);
  83  int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp);
  84 +int thermal_zone_get_slope(struct thermal_zone_device *tz);
  85 +int thermal_zone_get_offset(struct thermal_zone_device *tz);
  86
  87  int get_tz_trend(struct thermal_zone_device *, int);
  88  struct thermal_instance *get_thermal_instance(struct thermal_zone_device *,
  89 @@ -489,6 +491,12 @@ static inline struct thermal_zone_device
  90  static inline int thermal_zone_get_temp(
  91                 struct thermal_zone_device *tz, int *temp)
  92  { return -ENODEV; }
  93 +static inline int thermal_zone_get_slope(
  94 +               struct thermal_zone_device *tz)
  95 +{ return -ENODEV; }
  96 +static inline int thermal_zone_get_offset(
  97 +               struct thermal_zone_device *tz)
  98 +{ return -ENODEV; }
  99  static inline int get_tz_trend(struct thermal_zone_device *tz, int trip)
 100  { return -ENODEV; }
 101  static inline struct thermal_instance *