drivers/thermal/st/st_thermal.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 /*
   3  * ST Thermal Sensor Driver for STi series of SoCs
   4  * Author: Ajit Pal Singh <ajitpal.singh@st.com>
   5  *
   6  * Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
   7  */
   8
   9 #ifndef __STI_THERMAL_SYSCFG_H
  10 #define __STI_THERMAL_SYSCFG_H
  11
  12 #include <linux/interrupt.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/regmap.h>
  15 #include <linux/thermal.h>
  16
  17 enum st_thermal_regfield_ids {
  18         INT_THRESH_HI = 0, /* Top two regfield IDs are mutually exclusive */
  19         TEMP_PWR = 0,
  20         DCORRECT,
  21         OVERFLOW,
  22         DATA,
  23         INT_ENABLE,
  24
  25         MAX_REGFIELDS
  26 };
  27
  28 /* Thermal sensor power states */
  29 enum st_thermal_power_state {
  30         POWER_OFF = 0,
  31         POWER_ON
  32 };
  33
  34 struct st_thermal_sensor;
  35
  36 /**
  37  * Description of private thermal sensor ops.
  38  *
  39  * @power_ctrl:         Function for powering on/off a sensor. Clock to the
  40  *                      sensor is also controlled from this function.
  41  * @alloc_regfields:    Allocate regmap register fields, specific to a sensor.
  42  * @do_memmap_regmap:   Memory map the thermal register space and init regmap
  43  *                      instance or find regmap instance.
  44  * @register_irq:       Register an interrupt handler for a sensor.
  45  */
  46 struct st_thermal_sensor_ops {
  47         int (*power_ctrl)(struct st_thermal_sensor *, enum st_thermal_power_state);
  48         int (*alloc_regfields)(struct st_thermal_sensor *);
  49         int (*regmap_init)(struct st_thermal_sensor *);
  50         int (*register_enable_irq)(struct st_thermal_sensor *);
  51         int (*enable_irq)(struct st_thermal_sensor *);
  52 };
  53
  54 /**
  55  * Description of thermal driver compatible data.
  56  *
  57  * @reg_fields:         Pointer to the regfields array for a sensor.
  58  * @sys_compat:         Pointer to the syscon node compatible string.
  59  * @ops:                Pointer to private thermal ops for a sensor.
  60  * @calibration_val:    Default calibration value to be written to the DCORRECT
  61  *                      register field for a sensor.
  62  * @temp_adjust_val:    Value to be added/subtracted from the data read from
  63  *                      the sensor. If value needs to be added please provide a
  64  *                      positive value and if it is to be subtracted please
  65  *                      provide a negative value.
  66  * @crit_temp:          The temperature beyond which the SoC should be shutdown
  67  *                      to prevent damage.
  68  */
  69 struct st_thermal_compat_data {
  70         char *sys_compat;
  71         const struct reg_field *reg_fields;
  72         const struct st_thermal_sensor_ops *ops;
  73         unsigned int calibration_val;
  74         int temp_adjust_val;
  75         int crit_temp;
  76 };
  77
  78 struct st_thermal_sensor {
  79         struct device *dev;
  80         struct thermal_zone_device *thermal_dev;
  81         const struct st_thermal_sensor_ops *ops;
  82         const struct st_thermal_compat_data *cdata;
  83         struct clk *clk;
  84         struct regmap *regmap;
  85         struct regmap_field *pwr;
  86         struct regmap_field *dcorrect;
  87         struct regmap_field *overflow;
  88         struct regmap_field *temp_data;
  89         struct regmap_field *int_thresh_hi;
  90         struct regmap_field *int_enable;
  91         int irq;
  92         void __iomem *mmio_base;
  93 };
  94
  95 extern int st_thermal_register(struct platform_device *pdev,
  96                                const struct of_device_id *st_thermal_of_match);
  97 extern void st_thermal_unregister(struct platform_device *pdev);
  98 extern const struct dev_pm_ops st_thermal_pm_ops;
  99
 100 #endif /* __STI_RESET_SYSCFG_H */