forked from Minki/linux
105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
|
/*
|
||
|
|
* ST Thermal Sensor Driver for STi series of SoCs
|
||
|
|
* Author: Ajit Pal Singh <ajitpal.singh@st.com>
|
||
|
|
*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef __STI_THERMAL_SYSCFG_H
|
||
|
|
#define __STI_THERMAL_SYSCFG_H
|
||
|
|
|
||
|
|
#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 */
|
||
|
|
TEMP_PWR = 0,
|
||
|
|
DCORRECT,
|
||
|
|
OVERFLOW,
|
||
|
|
DATA,
|
||
|
|
INT_ENABLE,
|
||
|
|
|
||
|
|
MAX_REGFIELDS
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Thermal sensor power states */
|
||
|
|
enum st_thermal_power_state {
|
||
|
|
POWER_OFF = 0,
|
||
|
|
POWER_ON
|
||
|
|
};
|
||
|
|
|
||
|
|
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 */
|