1 // SPDX-License-Identifier: GPL-2.0-only
3  *  (C) 2004-2009  Dominik Brodowski <linux@dominikbrodowski.de>
25 	{"max",		required_argument,	NULL, 'u'},
27 	{"freq",	required_argument,	NULL, 'f'},
35 			"- Do you have proper administration rights? (super-user?)\n"  in print_error()
36 			"- Is the governor you requested available and modprobed?\n"  in print_error()
37 			"- Trying to set an invalid policy?\n"  in print_error()
38 			"- Trying to set a specific frequency, but userspace governor is not available,\n"  in print_error()
49 	{"hz", -3},
68 	unsigned long freq;  in string_to_frequency()  local
83 		for (unit = def_units; unit->str_unit; unit++) {  in string_to_frequency()
85 			     scan[i] && tolower(scan[i]) == unit->str_unit[i];  in string_to_frequency()
91 			power = unit->power_of_ten;  in string_to_frequency()
102 		while (power > -1 && isdigit(str[cp+1])) {  in string_to_frequency()
104 			power--;  in string_to_frequency()
107 	if (power >= -1) {		/* not enough => pad */  in string_to_frequency()
114 	if (cp <= 0 || cp + pad > NORM_FREQ_LEN - 1)  in string_to_frequency()
128 	match_count = (normalized[i-1] >= '5');  in string_to_frequency()
130 	normalized[i-1] = 0; /* cp > 0 && pad >= 0 ==> i > 0 */  in string_to_frequency()
134 	freq = strtoul(normalized, &end, 10);  in string_to_frequency()
138 		if (match_count && freq != ULONG_MAX)  in string_to_frequency()
139 			freq++;  in string_to_frequency()
140 		return freq;  in string_to_frequency()
151 		return -EINVAL;  in do_new_policy()
154 	if (!new_pol->min)  in do_new_policy()
155 		new_pol->min = cur_pol->min;  in do_new_policy()
157 	if (!new_pol->max)  in do_new_policy()
158 		new_pol->max = cur_pol->max;  in do_new_policy()
160 	if (!new_pol->governor)  in do_new_policy()
161 		new_pol->governor = cur_pol->governor;  in do_new_policy()
172 		unsigned long freq, unsigned int pc)  in do_one_cpu()  argument
176 		return cpufreq_set_frequency(cpu, freq);  in do_one_cpu()
182 		if (new_pol->min)  in do_one_cpu()
183 			return cpufreq_modify_policy_min(cpu, new_pol->min);  in do_one_cpu()
184 		else if (new_pol->max)  in do_one_cpu()
185 			return cpufreq_modify_policy_max(cpu, new_pol->max);  in do_one_cpu()
186 		else if (new_pol->governor)  in do_one_cpu()
188 							new_pol->governor);  in do_one_cpu()
202 	unsigned long freq = 0;  in cmd_freq_set()  local
208 		.max = 0,  in cmd_freq_set()
218 			return -EINVAL;  in cmd_freq_set()
219 		case -1:  in cmd_freq_set()
234 				return -EINVAL;  in cmd_freq_set()
238 			if (new_pol.max)  in cmd_freq_set()
241 			new_pol.max = string_to_frequency(optarg);  in cmd_freq_set()
242 			if (new_pol.max == 0) {  in cmd_freq_set()
244 				return -EINVAL;  in cmd_freq_set()
248 			if (freq)  in cmd_freq_set()
250 			freq = string_to_frequency(optarg);  in cmd_freq_set()
251 			if (freq == 0) {  in cmd_freq_set()
253 				return -EINVAL;  in cmd_freq_set()
262 				return -EINVAL;  in cmd_freq_set()
266 				return -EINVAL;  in cmd_freq_set()
276 		return -EINVAL;  in cmd_freq_set()
279 	if (freq && policychange) {  in cmd_freq_set()
280 		printf(_("the -f/--freq parameter cannot be combined with -d/--min, -u/--max or\n"  in cmd_freq_set()
281 				"-g/--governor parameters\n"));  in cmd_freq_set()
282 		return -EINVAL;  in cmd_freq_set()
285 	if (!freq && !policychange) {  in cmd_freq_set()
286 		printf(_("At least one parameter out of -f/--freq, -d/--min, -u/--max, and\n"  in cmd_freq_set()
287 				"-g/--governor must be passed\n"));  in cmd_freq_set()
288 		return -EINVAL;  in cmd_freq_set()
295 	/* Also set frequency settings for related CPUs if -r is passed */  in cmd_freq_set()
308 			while (cpus->next) {  in cmd_freq_set()
309 				bitmask_setbit(cpus_chosen, cpus->cpu);  in cmd_freq_set()
310 				cpus = cpus->next;  in cmd_freq_set()
313 			bitmask_setbit(cpus_chosen, cpus->cpu);  in cmd_freq_set()
329 		ret = do_one_cpu(cpu, &new_pol, freq, policychange);  in cmd_freq_set()