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Linux/arch/mips/include/asm/mach-loongson64/loongson_hwmon.h

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 #ifndef __LOONGSON_HWMON_H_
  3 #define __LOONGSON_HWMON_H_
  4 
  5 #include <linux/types.h>
  6 
  7 #define MIN_TEMP        0
  8 #define MAX_TEMP        255
  9 #define NOT_VALID_TEMP  999
 10 
 11 typedef int (*get_temp_fun)(int);
 12 extern int loongson3_cpu_temp(int);
 13 
 14 /* 0:Max speed, 1:Manual, 2:Auto */
 15 enum fan_control_mode {
 16         FAN_FULL_MODE = 0,
 17         FAN_MANUAL_MODE = 1,
 18         FAN_AUTO_MODE = 2,
 19         FAN_MODE_END
 20 };
 21 
 22 struct temp_range {
 23         u8 low;
 24         u8 high;
 25         u8 level;
 26 };
 27 
 28 #define CONSTANT_SPEED_POLICY   0  /* at constant speed */
 29 #define STEP_SPEED_POLICY       1  /* use up/down arrays to describe policy */
 30 #define KERNEL_HELPER_POLICY    2  /* kernel as a helper to fan control */
 31 
 32 #define MAX_STEP_NUM    16
 33 #define MAX_FAN_LEVEL   255
 34 
 35 /* loongson_fan_policy works when fan work at FAN_AUTO_MODE */
 36 struct loongson_fan_policy {
 37         u8      type;
 38 
 39         /* percent only used when type is CONSTANT_SPEED_POLICY */
 40         u8      percent;
 41 
 42         /* period between two check. (Unit: S) */
 43         u8      adjust_period;
 44 
 45         /* fan adjust usually depend on a temprature input */
 46         get_temp_fun    depend_temp;
 47 
 48         /* up_step/down_step used when type is STEP_SPEED_POLICY */
 49         u8      up_step_num;
 50         u8      down_step_num;
 51         struct temp_range up_step[MAX_STEP_NUM];
 52         struct temp_range down_step[MAX_STEP_NUM];
 53         struct delayed_work work;
 54 };
 55 
 56 #endif /* __LOONGSON_HWMON_H_*/
 57 

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