drivers/thermal/samsung/exynos_tmu.h

/*
 * exynos_tmu.h - Samsung EXYNOS TMU (Thermal Management Unit)
 *
 *  Copyright (C) 2011 Samsung Electronics
 *  Donggeun Kim <dg77.kim@samsung.com>
 *  Amit Daniel Kachhap <amit.daniel@samsung.com>
 *
 * 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.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _EXYNOS_TMU_H
#define _EXYNOS_TMU_H
#include <linux/cpu_cooling.h>
#include <linux/gpu_cooling.h>
#include <linux/isp_cooling.h>
#include <dt-bindings/thermal/thermal_exynos.h>

#define NR_HOTPLUG_CPUS	4
#define MCELSIUS        1000

enum soc_type {
	SOC_ARCH_EXYNOS8890 = 1,
	SOC_ARCH_EXYNOS8895 = 2,
	SOC_ARCH_EXYNOS7872,
	SOC_ARCH_EXYNOS9810,
	SOC_ARCH_EXYNOS9610,
};

/**
 * struct exynos_tmu_platform_data
 * @gain: gain of amplifier in the positive-TC generator block
 *	0 < gain <= 15
 * @reference_voltage: reference voltage of amplifier
 *	in the positive-TC generator block
 *	0 < reference_voltage <= 31
 * @noise_cancel_mode: noise cancellation mode
 *	000, 100, 101, 110 and 111 can be different modes
 * @type: determines the type of SOC
 * @efuse_value: platform defined fuse value
 * @default_temp_offset: default temperature offset in case of no trimming
 * @cal_type: calibration type for temperature
 *
 * This structure is required for configuration of exynos_tmu driver.
 */
struct exynos_tmu_platform_data {
	u8 gain;
	u8 reference_voltage;
	u8 noise_cancel_mode;

	u32 efuse_value;
	u8 first_point_trim;
	u8 second_point_trim;
	u8 default_temp_offset;
	u32 trip_temp;

	enum soc_type type;
	u32 sensor_type;
	u32 cal_type;
};

enum sensing_type {
	AVG = 0,
	MAX,
	MIN,
	BALANCE,
	END_OF_TYPE,
};

static const char * const sensing_method[] = {
	[AVG] = "avg",
	[MAX] = "max",
	[MIN] = "min",
	[BALANCE] = "balance",
};

struct sensor_info {
	u16 sensor_num;
	u16 cal_type;
	u16 temp_error1;
	u16 temp_error2;
};

/**
 * struct exynos_tmu_data : A structure to hold the private data of the TMU
	driver
 * @id: identifier of the one instance of the TMU controller.
 * @pdata: pointer to the tmu platform/configuration data
 * @base: base address of the single instance of the TMU controller.
 * @base_second: base address of the common registers of the TMU controller.
 * @irq: irq number of the TMU controller.
 * @soc: id of the SOC type.
 * @irq_work: pointer to the irq work structure.
 * @lock: lock to implement synchronization.
 * @temp_error1: fused value of the first point trim.
 * @temp_error2: fused value of the second point trim.
 * @num_probe: number of probe for TMU_CONTROL1 SFR setting.
 * @regulator: pointer to the TMU regulator structure.
 * @reg_conf: pointer to structure to register with core thermal.
 * @ntrip: number of supported trip points.
 * @tmu_initialize: SoC specific TMU initialization method
 * @tmu_control: SoC specific TMU control method
 * @tmu_read: SoC specific TMU temperature read method
 * @tmu_set_emulation: SoC specific TMU emulation setting method
 * @tmu_clear_irqs: SoC specific TMU interrupts clearing method
 */
struct exynos_tmu_data {
	int id;
	/* Throttle hotplug related variables */
	bool hotplug_enable;
	int hotplug_in_threshold;
	int hotplug_out_threshold;
	int limited_frequency;
	int limited_threshold;
	int limited_threshold_release;
	struct exynos_tmu_platform_data *pdata;
	void __iomem *base;
	int irq;
	enum soc_type soc;
	struct work_struct irq_work;
	struct mutex lock;
	u16 temp_error1, temp_error2;
	struct thermal_zone_device *tzd;
	unsigned int ntrip;
	bool enabled;
	struct thermal_cooling_device *cool_dev;
	struct list_head node;
	u32 sensors;
	int num_probe;
	int num_of_sensors;
	struct sensor_info *sensor_info;
	int sensing_mode;
	char tmu_name[THERMAL_NAME_LENGTH + 1];
	struct device_node *np;
	int balance_offset;
	struct mutex hotplug_lock;

	ktime_t last_thermal_status_updated;
	ktime_t thermal_status[3];

	int (*tmu_initialize)(struct platform_device *pdev);
	void (*tmu_control)(struct platform_device *pdev, bool on);
	int (*tmu_read)(struct exynos_tmu_data *data);
	void (*tmu_set_emulation)(struct exynos_tmu_data *data, int temp);
	void (*tmu_clear_irqs)(struct exynos_tmu_data *data);
};
#endif /* _EXYNOS_TMU_H */