LXR linux/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
  22struct tsens_device;
  23
  24struct 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 */
  45struct 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 */
  64struct 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 */
  71struct tsens_context {
  72        int     threshold;
  73        int     control;
  74};
  75
  76struct 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
  87char *qfprom_read(struct device *, const char *);
  88void compute_intercept_slope(struct tsens_device *, u32 *, u32 *, u32);
  89int init_common(struct tsens_device *);
  90int get_temp_common(struct tsens_device *, int, int *);
  91
  92extern const struct tsens_data data_8916, data_8974, data_8960, data_8996;
  93
  94#endif /* __QCOM_TSENS_H__ */
  95