drivers/thermal/qcom/tsens.h

   1 /*
   2  * Copyright (c) 2015, The Linux Foundation. All rights reserved.
   3  *
   4  * This software is licensed under the terms of the GNU General Public
   5  * License version 2, as published by the Free Software Foundation, and
   6  * may be copied, distributed, and modified under those terms.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13 #ifndef __QCOM_TSENS_H__
  14 #define __QCOM_TSENS_H__
  15
  16 #define ONE_PT_CALIB            0x1
  17 #define ONE_PT_CALIB2           0x2
  18 #define TWO_PT_CALIB            0x3
  19
  20 #include <linux/thermal.h>
  21
  22 struct tsens_device;
  23
  24 struct tsens_sensor {
  25         struct tsens_device             *tmdev;
  26         struct thermal_zone_device      *tzd;
  27         int                             offset;
  28         int                             id;
  29         int                             hw_id;
  30         int                             slope;
  31         u32                             status;
  32 };
  33
  34 /**
  35  * struct tsens_ops - operations as supported by the tsens device
  36  * @init: Function to initialize the tsens device
  37  * @calibrate: Function to calibrate the tsens device
  38  * @get_temp: Function which returns the temp in millidegC
  39  * @enable: Function to enable (clocks/power) tsens device
  40  * @disable: Function to disable the tsens device
  41  * @suspend: Function to suspend the tsens device
  42  * @resume: Function to resume the tsens device
  43  * @get_trend: Function to get the thermal/temp trend
  44  */
  45 struct tsens_ops {
  46         /* mandatory callbacks */
  47         int (*init)(struct tsens_device *);
  48         int (*calibrate)(struct tsens_device *);
  49         int (*get_temp)(struct tsens_device *, int, int *);
  50         /* optional callbacks */
  51         int (*enable)(struct tsens_device *, int);
  52         void (*disable)(struct tsens_device *);
  53         int (*suspend)(struct tsens_device *);
  54         int (*resume)(struct tsens_device *);
  55         int (*get_trend)(struct tsens_device *, int, enum thermal_trend *);
  56 };
  57
  58 /**
  59  * struct tsens_data - tsens instance specific data
  60  * @num_sensors: Max number of sensors supported by platform
  61  * @ops: operations the tsens instance supports
  62  * @hw_ids: Subset of sensors ids supported by platform, if not the first n
  63  */
  64 struct tsens_data {
  65         const u32               num_sensors;
  66         const struct tsens_ops  *ops;
  67         unsigned int            *hw_ids;
  68 };
  69
  70 /* Registers to be saved/restored across a context loss */
  71 struct tsens_context {
  72         int     threshold;
  73         int     control;
  74 };
  75
  76 struct tsens_device {
  77         struct device                   *dev;
  78         u32                             num_sensors;
  79         struct regmap                   *map;
  80         struct regmap_field             *status_field;
  81         struct tsens_context            ctx;
  82         bool                            trdy;
  83         const struct tsens_ops          *ops;
  84         struct tsens_sensor             sensor[0];
  85 };
  86
  87 char *qfprom_read(struct device *, const char *);
  88 void compute_intercept_slope(struct tsens_device *, u32 *, u32 *, u32);
  89 int init_common(struct tsens_device *);
  90 int get_temp_common(struct tsens_device *, int, int *);
  91
  92 extern const struct tsens_data data_8916, data_8974, data_8960, data_8996;
  93
  94 #endif /* __QCOM_TSENS_H__ */