/* 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_*/