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

   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 temperature 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_*/