1 // SPDX-License-Identifier: GPL-2.0-only
3  *  (C) 2004-2009  Dominik Brodowski <[email protected]>
37 					     const char *value, size_t len)  in sysfs_cpufreq_write_file()  argument
47 	if (fd == -1)  in sysfs_cpufreq_write_file()
50 	numwrite = write(fd, value, len);  in sysfs_cpufreq_write_file()
92 	unsigned int len;  in cpufreq_get_sysfs_value_from_table()  local
99 	len = sysfs_cpufreq_read_file(cpu, table[index], linebuf,  in cpufreq_get_sysfs_value_from_table()
102 	if (len == 0)  in cpufreq_get_sysfs_value_from_table()
146 	unsigned int len;  in sysfs_cpufreq_get_one_string()  local
151 	len = sysfs_cpufreq_read_file(cpu, cpufreq_string_files[which],  in sysfs_cpufreq_get_one_string()
153 	if (len == 0)  in sysfs_cpufreq_get_one_string()
160 	if (result[strlen(result) - 1] == '\n')  in sysfs_cpufreq_get_one_string()
161 		result[strlen(result) - 1] = '\0';  in sysfs_cpufreq_get_one_string()
185 					 const char *new_value, size_t len)  in sysfs_cpufreq_write_one_value()  argument
191 					new_value, len) != len)  in sysfs_cpufreq_write_one_value()
192 		return -ENODEV;  in sysfs_cpufreq_write_one_value()
225 				unsigned long *min,  in cpufreq_get_hardware_limits()  argument
228 	if ((!min) || (!max))  in cpufreq_get_hardware_limits()
229 		return -EINVAL;  in cpufreq_get_hardware_limits()
231 	*min = sysfs_cpufreq_get_one_value(cpu, CPUINFO_MIN_FREQ);  in cpufreq_get_hardware_limits()
232 	if (!*min)  in cpufreq_get_hardware_limits()
233 		return -ENODEV;  in cpufreq_get_hardware_limits()
237 		return -ENODEV;  in cpufreq_get_hardware_limits()
262 	policy->governor = sysfs_cpufreq_get_one_string(cpu, SCALING_GOVERNOR);  in cpufreq_get_policy()
263 	if (!policy->governor) {  in cpufreq_get_policy()
267 	policy->min = sysfs_cpufreq_get_one_value(cpu, SCALING_MIN_FREQ);  in cpufreq_get_policy()
268 	policy->max = sysfs_cpufreq_get_one_value(cpu, SCALING_MAX_FREQ);  in cpufreq_get_policy()
269 	if ((!policy->min) || (!policy->max)) {  in cpufreq_get_policy()
270 		free(policy->governor);  in cpufreq_get_policy()
280 	if ((!policy) || (!policy->governor))  in cpufreq_put_policy()
283 	free(policy->governor);  in cpufreq_put_policy()
284 	policy->governor = NULL;  in cpufreq_put_policy()
295 	unsigned int len;  in cpufreq_get_available_governors()  local
297 	len = sysfs_cpufreq_read_file(cpu, "scaling_available_governors",  in cpufreq_get_available_governors()
299 	if (len == 0)  in cpufreq_get_available_governors()
303 	for (i = 0; i < len; i++) {  in cpufreq_get_available_governors()
305 			if (i - pos < 2)  in cpufreq_get_available_governors()
308 				current->next = malloc(sizeof(*current));  in cpufreq_get_available_governors()
309 				if (!current->next)  in cpufreq_get_available_governors()
311 				current = current->next;  in cpufreq_get_available_governors()
318 			current->first = first;  in cpufreq_get_available_governors()
319 			current->next = NULL;  in cpufreq_get_available_governors()
321 			current->governor = malloc(i - pos + 1);  in cpufreq_get_available_governors()
322 			if (!current->governor)  in cpufreq_get_available_governors()
325 			memcpy(current->governor, linebuf + pos, i - pos);  in cpufreq_get_available_governors()
326 			current->governor[i - pos] = '\0';  in cpufreq_get_available_governors()
335 		current = first->next;  in cpufreq_get_available_governors()
336 		if (first->governor)  in cpufreq_get_available_governors()
337 			free(first->governor);  in cpufreq_get_available_governors()
351 	tmp = any->first;  in cpufreq_put_available_governors()
353 		next = tmp->next;  in cpufreq_put_available_governors()
354 		if (tmp->governor)  in cpufreq_put_available_governors()
355 			free(tmp->governor);  in cpufreq_put_available_governors()
370 	unsigned int len;  in cpufreq_get_available_frequencies()  local
372 	len = sysfs_cpufreq_read_file(cpu, "scaling_available_frequencies",  in cpufreq_get_available_frequencies()
374 	if (len == 0)  in cpufreq_get_available_frequencies()
378 	for (i = 0; i < len; i++) {  in cpufreq_get_available_frequencies()
380 			if (i - pos < 2)  in cpufreq_get_available_frequencies()
382 			if (i - pos >= SYSFS_PATH_MAX)  in cpufreq_get_available_frequencies()
385 				current->next = malloc(sizeof(*current));  in cpufreq_get_available_frequencies()
386 				if (!current->next)  in cpufreq_get_available_frequencies()
388 				current = current->next;  in cpufreq_get_available_frequencies()
395 			current->first = first;  in cpufreq_get_available_frequencies()
396 			current->next = NULL;  in cpufreq_get_available_frequencies()
398 			memcpy(one_value, linebuf + pos, i - pos);  in cpufreq_get_available_frequencies()
399 			one_value[i - pos] = '\0';  in cpufreq_get_available_frequencies()
400 			if (sscanf(one_value, "%lu", &current->frequency) != 1)  in cpufreq_get_available_frequencies()
411 		current = first->next;  in cpufreq_get_available_frequencies()
426 	unsigned int len;  in cpufreq_get_boost_frequencies()  local
428 	len = sysfs_cpufreq_read_file(cpu, "scaling_boost_frequencies",  in cpufreq_get_boost_frequencies()
430 	if (len == 0)  in cpufreq_get_boost_frequencies()
434 	for (i = 0; i < len; i++) {  in cpufreq_get_boost_frequencies()
436 			if (i - pos < 2)  in cpufreq_get_boost_frequencies()
438 			if (i - pos >= SYSFS_PATH_MAX)  in cpufreq_get_boost_frequencies()
441 				current->next = malloc(sizeof(*current));  in cpufreq_get_boost_frequencies()
442 				if (!current->next)  in cpufreq_get_boost_frequencies()
444 				current = current->next;  in cpufreq_get_boost_frequencies()
451 			current->first = first;  in cpufreq_get_boost_frequencies()
452 			current->next = NULL;  in cpufreq_get_boost_frequencies()
454 			memcpy(one_value, linebuf + pos, i - pos);  in cpufreq_get_boost_frequencies()
455 			one_value[i - pos] = '\0';  in cpufreq_get_boost_frequencies()
456 			if (sscanf(one_value, "%lu", &current->frequency) != 1)  in cpufreq_get_boost_frequencies()
467 		current = first->next;  in cpufreq_get_boost_frequencies()
481 	tmp = any->first;  in cpufreq_put_available_frequencies()
483 		next = tmp->next;  in cpufreq_put_available_frequencies()
502 	unsigned int len;  in sysfs_get_cpu_list()  local
504 	len = sysfs_cpufreq_read_file(cpu, file, linebuf, sizeof(linebuf));  in sysfs_get_cpu_list()
505 	if (len == 0)  in sysfs_get_cpu_list()
509 	for (i = 0; i < len; i++) {  in sysfs_get_cpu_list()
510 		if (i == len || linebuf[i] == ' ' || linebuf[i] == '\n') {  in sysfs_get_cpu_list()
511 			if (i - pos  < 1)  in sysfs_get_cpu_list()
513 			if (i - pos >= SYSFS_PATH_MAX)  in sysfs_get_cpu_list()
516 				current->next = malloc(sizeof(*current));  in sysfs_get_cpu_list()
517 				if (!current->next)  in sysfs_get_cpu_list()
519 				current = current->next;  in sysfs_get_cpu_list()
526 			current->first = first;  in sysfs_get_cpu_list()
527 			current->next = NULL;  in sysfs_get_cpu_list()
529 			memcpy(one_value, linebuf + pos, i - pos);  in sysfs_get_cpu_list()
530 			one_value[i - pos] = '\0';  in sysfs_get_cpu_list()
532 			if (sscanf(one_value, "%u", &current->cpu) != 1)  in sysfs_get_cpu_list()
543 		current = first->next;  in sysfs_get_cpu_list()
562 	tmp = any->first;  in cpufreq_put_affected_cpus()
564 		next = tmp->next;  in cpufreq_put_affected_cpus()
586 		return -EINVAL;  in verify_gov()
600 		if (new_gov[i] == '-')  in verify_gov()
610 		return -EINVAL;  in verify_gov()
618 	char min[SYSFS_PATH_MAX];  in cpufreq_set_policy()  local
625 	if (!policy || !(policy->governor))  in cpufreq_set_policy()
626 		return -EINVAL;  in cpufreq_set_policy()
628 	if (policy->max < policy->min)  in cpufreq_set_policy()
629 		return -EINVAL;  in cpufreq_set_policy()
631 	if (verify_gov(gov, policy->governor))  in cpufreq_set_policy()
632 		return -EINVAL;  in cpufreq_set_policy()
634 	snprintf(min, SYSFS_PATH_MAX, "%lu", policy->min);  in cpufreq_set_policy()
635 	snprintf(max, SYSFS_PATH_MAX, "%lu", policy->max);  in cpufreq_set_policy()
638 	write_max_first = (old_min && (policy->max < old_min) ? 0 : 1);  in cpufreq_set_policy()
647 	ret = sysfs_cpufreq_write_one_value(cpu, WRITE_SCALING_MIN_FREQ, min,  in cpufreq_set_policy()
648 					    strlen(min));  in cpufreq_set_policy()
690 		return -EINVAL;  in cpufreq_modify_policy_governor()
693 		return -EINVAL;  in cpufreq_modify_policy_governor()
707 		return -ENODEV;  in cpufreq_set_frequency()
709 	if (strncmp(pol->governor, userspace_gov, 9) != 0) {  in cpufreq_set_frequency()
733 	unsigned int len;  in cpufreq_get_stats()  local
735 	len = sysfs_cpufreq_read_file(cpu, "stats/time_in_state",  in cpufreq_get_stats()
737 	if (len == 0)  in cpufreq_get_stats()
742 	for (i = 0; i < len; i++) {  in cpufreq_get_stats()
744 			if (i - pos < 2)  in cpufreq_get_stats()
746 			if ((i - pos) >= SYSFS_PATH_MAX)  in cpufreq_get_stats()
749 				current->next = malloc(sizeof(*current));  in cpufreq_get_stats()
750 				if (!current->next)  in cpufreq_get_stats()
752 				current = current->next;  in cpufreq_get_stats()
759 			current->first = first;  in cpufreq_get_stats()
760 			current->next = NULL;  in cpufreq_get_stats()
762 			memcpy(one_value, linebuf + pos, i - pos);  in cpufreq_get_stats()
763 			one_value[i - pos] = '\0';  in cpufreq_get_stats()
765 					&current->frequency,  in cpufreq_get_stats()
766 					&current->time_in_state) != 2)  in cpufreq_get_stats()
769 			*total_time = *total_time + current->time_in_state;  in cpufreq_get_stats()
778 		current = first->next;  in cpufreq_get_stats()
792 	tmp = any->first;  in cpufreq_put_stats()
794 		next = tmp->next;  in cpufreq_put_stats()