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* ST Thermal Sensor Driver for STi series of SoCs
* Author: Ajit Pal Singh <>
* Copyright (C) 2003-2014 STMicroelectronics (R&D) Limited
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/thermal.h>
enum st_thermal_regfield_ids {
INT_THRESH_HI = 0, /* Top two regfield IDs are mutually exclusive */
/* Thermal sensor power states */
enum st_thermal_power_state {
struct st_thermal_sensor;
* Description of private thermal sensor ops.
* @power_ctrl: Function for powering on/off a sensor. Clock to the
* sensor is also controlled from this function.
* @alloc_regfields: Allocate regmap register fields, specific to a sensor.
* @do_memmap_regmap: Memory map the thermal register space and init regmap
* instance or find regmap instance.
* @register_irq: Register an interrupt handler for a sensor.
struct st_thermal_sensor_ops {
int (*power_ctrl)(struct st_thermal_sensor *, enum st_thermal_power_state);
int (*alloc_regfields)(struct st_thermal_sensor *);
int (*regmap_init)(struct st_thermal_sensor *);
int (*register_enable_irq)(struct st_thermal_sensor *);
int (*enable_irq)(struct st_thermal_sensor *);
* Description of thermal driver compatible data.
* @reg_fields: Pointer to the regfields array for a sensor.
* @sys_compat: Pointer to the syscon node compatible string.
* @ops: Pointer to private thermal ops for a sensor.
* @calibration_val: Default calibration value to be written to the DCORRECT
* register field for a sensor.
* @temp_adjust_val: Value to be added/subtracted from the data read from
* the sensor. If value needs to be added please provide a
* positive value and if it is to be subtracted please
* provide a negative value.
* @crit_temp: The temperature beyond which the SoC should be shutdown
* to prevent damage.
struct st_thermal_compat_data {
char *sys_compat;
const struct reg_field *reg_fields;
const struct st_thermal_sensor_ops *ops;
unsigned int calibration_val;
int temp_adjust_val;
int crit_temp;
struct st_thermal_sensor {
struct device *dev;
struct thermal_zone_device *thermal_dev;
const struct st_thermal_sensor_ops *ops;
const struct st_thermal_compat_data *cdata;
struct clk *clk;
struct regmap *regmap;
struct regmap_field *pwr;
struct regmap_field *dcorrect;
struct regmap_field *overflow;
struct regmap_field *temp_data;
struct regmap_field *int_thresh_hi;
struct regmap_field *int_enable;
int irq;
void __iomem *mmio_base;
extern int st_thermal_register(struct platform_device *pdev,
const struct of_device_id *st_thermal_of_match);
extern int st_thermal_unregister(struct platform_device *pdev);
extern const struct dev_pm_ops st_thermal_pm_ops;
#endif /* __STI_RESET_SYSCFG_H */