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

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