/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __LOONGSON_HWMON_H_
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#define __LOONGSON_HWMON_H_
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#include <linux/types.h>
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#define MIN_TEMP 0
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#define MAX_TEMP 255
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#define NOT_VALID_TEMP 999
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typedef int (*get_temp_fun)(int);
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extern int loongson3_cpu_temp(int);
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/* 0:Max speed, 1:Manual, 2:Auto */
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enum fan_control_mode {
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FAN_FULL_MODE = 0,
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FAN_MANUAL_MODE = 1,
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FAN_AUTO_MODE = 2,
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FAN_MODE_END
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};
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struct temp_range {
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u8 low;
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u8 high;
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u8 level;
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};
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#define CONSTANT_SPEED_POLICY 0 /* at constant speed */
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#define STEP_SPEED_POLICY 1 /* use up/down arrays to describe policy */
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#define KERNEL_HELPER_POLICY 2 /* kernel as a helper to fan control */
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#define MAX_STEP_NUM 16
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#define MAX_FAN_LEVEL 255
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/* loongson_fan_policy works when fan work at FAN_AUTO_MODE */
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struct loongson_fan_policy {
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u8 type;
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/* percent only used when type is CONSTANT_SPEED_POLICY */
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u8 percent;
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/* period between two check. (Unit: S) */
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u8 adjust_period;
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/* fan adjust usually depend on a temprature input */
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get_temp_fun depend_temp;
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/* up_step/down_step used when type is STEP_SPEED_POLICY */
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u8 up_step_num;
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u8 down_step_num;
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struct temp_range up_step[MAX_STEP_NUM];
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struct temp_range down_step[MAX_STEP_NUM];
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struct delayed_work work;
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};
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#endif /* __LOONGSON_HWMON_H_*/
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