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/*
* include/linux/therm_est.h
*
* Copyright (c) 2010-2014, NVIDIA CORPORATION. All rights reserved.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#ifndef _LINUX_THERM_EST_H
#define _LINUX_THERM_EST_H
#include <linux/workqueue.h>
#include <linux/thermal.h>
#include <linux/platform_data/thermal_sensors.h>
#define HIST_LEN (20)
#define MAX_ACTIVE_STATES 10
#define MAX_TIMER_TRIPS 10
struct therm_est_subdevice {
void *dev_data;
struct thermal_zone_device *sub_thz;
long coeffs[HIST_LEN];
long hist[HIST_LEN];
};
/*
* Timer trip provides a way to change trip temp dynamically based on timestamp
* when the trip is enabled.
* - Timer trip can be various numbers on a trip.
* - If the trip is enabled, then timer will be started with time_after delay
* in the corresponding timer trip. After the timer expires, trip_temp and
* hysteresis in the corresponding timer trip will be used to trip_temp for
* the trip.
* - When the timer has expired, index of timer trip will be increased a step
* and then start the timer with time_after delay in newly indexed timer trip.
* - When temp is below trip temp, index of timer trip will be decreased a step
* and then stop the timer and start the timer with time_after delay in newly
* indexed timer trip.
* - The timer will be stopped if there is no more next timer trip on the trip,
* or the trip is disabled.
*/
struct therm_est_timer_trip {
long time_after; /* in msec */
long trip_temp;
long hysteresis;
};
struct therm_est_timer_trip_info {
int trip; /* trip point on thermal zone to apply timer trip */
int num_timers;
struct therm_est_timer_trip timers[MAX_TIMER_TRIPS];
int cur; /* index of current timer trip */
s64 last_tripped; /* timestamp when the trip is enabled, in msec */
};
struct therm_est_data {
/* trip point info */
int num_trips;
struct thermal_trip_info *trips;
/* timer trip info */
int num_timer_trips;
struct therm_est_timer_trip_info *timer_trips;
/* zone parameters */
struct thermal_zone_params *tzp;
long toffset;
long polling_period;
int passive_delay;
int tc1;
int tc2;
int ndevs;
struct therm_est_subdevice *devs;
int use_activator;
};
struct therm_fan_est_subdevice {
void *dev_data;
int (*get_temp)(void *, long *);
long coeffs[HIST_LEN];
long hist[HIST_LEN];
};
struct therm_fan_est_data {
long toffset;
long polling_period;
int ndevs;
char *cdev_type;
int active_trip_temps[MAX_ACTIVE_STATES];
int active_hysteresis[MAX_ACTIVE_STATES];
struct thermal_zone_params *tzp;
struct therm_fan_est_subdevice devs[];
};
#endif /* _LINUX_THERM_EST_H */
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