1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
4  * Copyright (c) 2009-2011 Nathan Whitehorn
62     &enable_pmac_thermal, 1, "Enable automatic fan management");
66 	struct pmac_fan			*fan;  member
99 	struct pmac_fan_le *fan;  in pmac_therm_manage_fans()  local
110 		temp = sensor->sensor->read(sensor->sensor);  in pmac_therm_manage_fans()
112 			sensor->last_val = temp;  in pmac_therm_manage_fans()
114 		if (sensor->last_val > sensor->sensor->max_temp) {  in pmac_therm_manage_fans()
115 			sensor->critical_count++;  in pmac_therm_manage_fans()
119 			    sensor->sensor->name,  in pmac_therm_manage_fans()
120 			    (sensor->last_val - ZERO_C_TO_K) / 10,  in pmac_therm_manage_fans()
121 			    (sensor->last_val - ZERO_C_TO_K) % 10,  in pmac_therm_manage_fans()
122 			    (sensor->sensor->max_temp - ZERO_C_TO_K) / 10,  in pmac_therm_manage_fans()
123 			    (sensor->sensor->max_temp - ZERO_C_TO_K) % 10,  in pmac_therm_manage_fans()
124 			    sensor->critical_count);  in pmac_therm_manage_fans()
125 			if (sensor->critical_count >= MAX_CRITICAL_COUNT) {  in pmac_therm_manage_fans()
129 				    sensor->sensor->name,  in pmac_therm_manage_fans()
130 				    sensor->critical_count);  in pmac_therm_manage_fans()
134 			if (sensor->critical_count > 0)  in pmac_therm_manage_fans()
135 				sensor->critical_count--;  in pmac_therm_manage_fans()
140 	SLIST_FOREACH(fan, &fans, entries) {  in pmac_therm_manage_fans()
144 			temp = imin(sensor->last_val,  in pmac_therm_manage_fans()
145 			    sensor->sensor->max_temp);  in pmac_therm_manage_fans()
146 			frac_excess = (temp -  in pmac_therm_manage_fans()
147 			    sensor->sensor->target_temp)*100 /  in pmac_therm_manage_fans()
148 			    (sensor->sensor->max_temp - temp + 1);  in pmac_therm_manage_fans()
151 			if (sensor->sensor->zone == fan->fan->zone) {  in pmac_therm_manage_fans()
166 			fan->fan->set(fan->fan, fan->fan->default_rpm);  in pmac_therm_manage_fans()
171 		 * Scale the fan linearly in the max temperature in its  in pmac_therm_manage_fans()
176 		    (fan->fan->max_rpm - fan->fan->min_rpm)/100 +  in pmac_therm_manage_fans()
177 		    fan->fan->min_rpm;  in pmac_therm_manage_fans()
178 		if (fan_speed >= fan->last_val) {  in pmac_therm_manage_fans()
179 		    fan->timer = FAN_HYSTERESIS_TIMER;  in pmac_therm_manage_fans()
180 		    fan->last_val = fan_speed;  in pmac_therm_manage_fans()
182 		    fan->timer--;  in pmac_therm_manage_fans()
183 		    if (fan->timer == 0) {  in pmac_therm_manage_fans()
184 		    	fan->last_val = fan_speed;  in pmac_therm_manage_fans()
185 		    	fan->timer = FAN_HYSTERESIS_TIMER;  in pmac_therm_manage_fans()
188 		fan->fan->set(fan->fan, fan->last_val);  in pmac_therm_manage_fans()
193 pmac_thermal_fan_register(struct pmac_fan *fan)  in pmac_thermal_fan_register()  argument
199 	list_entry->fan = fan;  in pmac_thermal_fan_register()
211 	list_entry->sensor = sensor;  in pmac_thermal_sensor_register()
212 	list_entry->last_val = 0;  in pmac_thermal_sensor_register()
213 	list_entry->critical_count = 0;  in pmac_thermal_sensor_register()