1 // SPDX-License-Identifier: GPL-2.0-or-later
36 	int ret = -1;  in sysfs_set_ulong()
52 /* history of thermal data, used for control algo */
60 	int ret = -1;  in sysfs_get_ulong()
79 	int ret = -1;  in sysfs_get_string()
98 	sysfs_get_string(path, "type", cdi->type);  in probe_cdev()
99 	sysfs_get_ulong(path, "max_state",  &cdi->max_state);  in probe_cdev()
100 	sysfs_get_ulong(path, "cur_state", &cdi->cur_state);  in probe_cdev()
104 		cdi->type, cdi->max_state, cdi->cur_state, cdi->instance);  in probe_cdev()
118 	return -ENOENT;  in str_to_trip_type()
121 /* scan and fill in trip point info for a thermal zone and trip point id */
129 		return -EINVAL;  in get_trip_point_data()
136 		return -ENOENT;  in get_trip_point_data()
162 	return -1;  in get_instance_id()
165 /* Find trip point info of a thermal zone */
174 		/* check if trip point temp is non-zero  in find_tzone_tp()
179 			tzi->nr_trip_pts++;  in find_tzone_tp()
187 				return -1;  in find_tzone_tp()
190 			tzi->tp[tp_id].temp = temp_ulong;  in find_tzone_tp()
207 	if (nl->d_type == DT_LNK) {  in find_tzone_cdev()
208 		syslog(LOG_DEBUG, "TZ%d: cdev: %s cid %d\n", tz_id, nl->d_name,  in find_tzone_cdev()
210 		tzi->nr_cdev++;  in find_tzone_cdev()
211 		if (tzi->nr_cdev > ptdata.nr_cooling_dev) {  in find_tzone_cdev()
213 				tzi->nr_cdev);  in find_tzone_cdev()
214 			return -EINVAL;  in find_tzone_cdev()
217 		snprintf(cdev_name, sizeof(cdev_name) - 2, "%s/%s",  in find_tzone_cdev()
218 			 tz_name, nl->d_name);  in find_tzone_cdev()
221 				sizeof(cdev_name_linked) - 1) != -1) {  in find_tzone_cdev()
223 						sizeof("device") - 1);  in find_tzone_cdev()
226 			tzi->cdev_binding |= (1 << cdev_id);  in find_tzone_cdev()
231 			snprintf(cdev_trip_name, sizeof(cdev_trip_name) - 1,  in find_tzone_cdev()
232 				"%s%s", nl->d_name, "_trip_point");  in find_tzone_cdev()
235 			/* validate trip point range, e.g. trip could return -1  in find_tzone_cdev()
240 			tzi->trip_binding[cdev_id] |= 1 << trip_instance;  in find_tzone_cdev()
241 			syslog(LOG_DEBUG, "cdev %s -> trip:%lu: 0x%lx %d\n",  in find_tzone_cdev()
243 				tzi->trip_binding[cdev_id],  in find_tzone_cdev()
251 	return -ENODEV;  in find_tzone_cdev()
257  * Before calling scan_tzones, thermal sysfs must be probed to determine
258  * the number of thermal zones and cooling devices.
259  * We loop through each thermal zone and fill in tz_info struct, i.e.
261 root@jacob-chiefriver:~# tree -d /sys/class/thermal/thermal_zone0
262 /sys/class/thermal/thermal_zone0
263 |-- cdev0 -> ../cooling_device4
264 |-- cdev1 -> ../cooling_device3
265 |-- cdev10 -> ../cooling_device7
266 |-- cdev11 -> ../cooling_device6
267 |-- cdev12 -> ../cooling_device5
268 |-- cdev2 -> ../cooling_device2
269 |-- cdev3 -> ../cooling_device1
270 |-- cdev4 -> ../cooling_device0
271 |-- cdev5 -> ../cooling_device12
272 |-- cdev6 -> ../cooling_device11
273 |-- cdev7 -> ../cooling_device10
274 |-- cdev8 -> ../cooling_device9
275 |-- cdev9 -> ../cooling_device8
276 |-- device -> ../../../LNXSYSTM:00/device:62/LNXTHERM:00
277 |-- power
278 `-- subsystem -> ../../../../class/thermal
288 		return -1;  in scan_tzones()
296 			syslog(LOG_INFO, "Thermal zone %s skipped\n", tz_name);  in scan_tzones()
310 			while (n--) {  in scan_tzones()
313 				if (find_tzone_tp(tz_name, namelist[n]->d_name,  in scan_tzones()
316 				temp_str = strstr(namelist[n]->d_name, "cdev");  in scan_tzones()
372 			while (n--)  in scan_cdevs()
391 		fprintf(stderr, "\nNo thermal sysfs, exit\n");  in probe_thermal_sysfs()
392 		return -1;  in probe_thermal_sysfs()
396 		syslog(LOG_ERR, "scandir failed in thermal sysfs");  in probe_thermal_sysfs()
398 		/* detect number of thermal zones and cooling devices */  in probe_thermal_sysfs()
399 		while (n--) {  in probe_thermal_sysfs()
402 			if (strstr(namelist[n]->d_name, CDEV)) {  in probe_thermal_sysfs()
403 				inst = get_instance_id(namelist[n]->d_name, 1,  in probe_thermal_sysfs()
404 						sizeof("device") - 1);  in probe_thermal_sysfs()
412 					namelist[n]->d_name,  in probe_thermal_sysfs()
416 			} else if (strstr(namelist[n]->d_name, TZONE)) {  in probe_thermal_sysfs()
417 				inst = get_instance_id(namelist[n]->d_name, 1,  in probe_thermal_sysfs()
418 						sizeof("zone") - 1);  in probe_thermal_sysfs()
423 					namelist[n]->d_name,  in probe_thermal_sysfs()
438 		fprintf(stderr, "\nNo thermal zones found, exit\n\n");  in probe_thermal_sysfs()
439 		return -1;  in probe_thermal_sysfs()
445 		return -1;  in probe_thermal_sysfs()
448 	/* we still show thermal zone information if there is no cdev */  in probe_thermal_sysfs()
455 			return -1;  in probe_thermal_sysfs()
461 		return -1;  in probe_thermal_sysfs()
463 		return -1;  in probe_thermal_sysfs()
475 	return -ENOENT;  in zone_instance_to_index()
478 /* read temperature of all thermal zones */
487 		syslog(LOG_ERR, "No thermal zones found!\n");  in update_thermal_data()
488 		return -1;  in update_thermal_data()
564 	int ctrl_cdev_id = -1;  in get_ctrl_state()
578 	if (ctrl_cdev_id == -1) {  in get_ctrl_state()