32 		 "Millicelsius values above which the fan speed increases");
37 		 "Hysteresis in millicelsius before lowering the fan speed");
42 		 "minimum fan speed to allow when system is powered by AC");
54 static void gpd_pocket_fan_set_speed(struct gpd_pocket_fan_data *fan, int speed)  in gpd_pocket_fan_set_speed()  argument
56 	if (speed == fan->last_speed)  in gpd_pocket_fan_set_speed()
59 	gpiod_direction_output(fan->gpio0, !!(speed & 1));  in gpd_pocket_fan_set_speed()
60 	gpiod_direction_output(fan->gpio1, !!(speed & 2));  in gpd_pocket_fan_set_speed()
62 	fan->last_speed = speed;  in gpd_pocket_fan_set_speed()
77 	int t0, t1, temp, speed, min_speed, i;  in gpd_pocket_fan_worker()  local
82 		speed = MAX_SPEED;  in gpd_pocket_fan_worker()
88 	speed = fan->last_speed;  in gpd_pocket_fan_worker()
91 	/* Determine minimum speed */  in gpd_pocket_fan_worker()
96 	if (speed < i)  in gpd_pocket_fan_worker()
97 		speed = i;  in gpd_pocket_fan_worker()
99 	/* Use hysteresis before lowering speed again */  in gpd_pocket_fan_worker()
104 	if (speed > i)  in gpd_pocket_fan_worker()
105 		speed = i;  in gpd_pocket_fan_worker()
107 	if (fan->last_speed <= 0 && speed)  in gpd_pocket_fan_worker()
108 		speed = MAX_SPEED; /* kick start motor */  in gpd_pocket_fan_worker()
111 	gpd_pocket_fan_set_speed(fan, speed);  in gpd_pocket_fan_worker()
113 	/* When mostly idle (low temp/speed), slow down the poll interval. */  in gpd_pocket_fan_worker()
115 			   msecs_to_jiffies(4000 / (speed + 1)));  in gpd_pocket_fan_worker()