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/* 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 temprature 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_*/