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