/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __LOONGSON_HWMON_H_
#define __LOONGSON_HWMON_H_

#include <linux/types.h>

#define MIN_TEMP        0
#define MAX_TEMP        255
#define NOT_VALID_TEMP  999

typedef int (*get_temp_fun)(int);
extern int loongson3_cpu_temp(int);

/* 0:Max speed, 1:Manual, 2:Auto */
enum fan_control_mode {
        FAN_FULL_MODE = 0,
        FAN_MANUAL_MODE = 1,
        FAN_AUTO_MODE = 2,
        FAN_MODE_END
};

struct temp_range {
        u8 low;
        u8 high;
        u8 level;
};

#define CONSTANT_SPEED_POLICY   0  /* at constant speed */
#define STEP_SPEED_POLICY       1  /* use up/down arrays to describe policy */
#define KERNEL_HELPER_POLICY    2  /* kernel as a helper to fan control */

#define MAX_STEP_NUM    16
#define MAX_FAN_LEVEL   255

/* loongson_fan_policy works when fan work at FAN_AUTO_MODE */
struct loongson_fan_policy {
        u8      type;

        /* percent only used when type is CONSTANT_SPEED_POLICY */
        u8      percent;

        /* period between two check. (Unit: S) */
        u8      adjust_period;

        /* fan adjust usually depend on a temperature input */
        get_temp_fun    depend_temp;

        /* up_step/down_step used when type is STEP_SPEED_POLICY */
        u8      up_step_num;
        u8      down_step_num;
        struct temp_range up_step[MAX_STEP_NUM];
        struct temp_range down_step[MAX_STEP_NUM];
        struct delayed_work work;
};

#endif /* __LOONGSON_HWMON_H_*/