1 // SPDX-License-Identifier: GPL-2.0-only
7  *            (C)  2002 - 2004 Dominik Brodowski <linux@brodo.de>
22  * cpufreq_set - set the CPU frequency
23  * @policy: pointer to policy struct where freq is being set
24  * @freq: target frequency in kHz
26  * Sets the CPU frequency to freq.
28 static int cpufreq_set(struct cpufreq_policy *policy, unsigned int freq)  in cpufreq_set()  argument
30 	int ret = -EINVAL;  in cpufreq_set()
31 	unsigned int *setspeed = policy->governor_data;  in cpufreq_set()
33 	pr_debug("cpufreq_set for cpu %u, freq %u kHz\n", policy->cpu, freq);  in cpufreq_set()
36 	if (!per_cpu(cpu_is_managed, policy->cpu))  in cpufreq_set()
39 	*setspeed = freq;  in cpufreq_set()
41 	ret = __cpufreq_driver_target(policy, freq, CPUFREQ_RELATION_L);  in cpufreq_set()
49 	return sprintf(buf, "%u\n", policy->cur);  in show_speed()
58 		return -ENOMEM;  in cpufreq_userspace_policy_init()
60 	policy->governor_data = setspeed;  in cpufreq_userspace_policy_init()
67 	kfree(policy->governor_data);  in cpufreq_userspace_policy_exit()
68 	policy->governor_data = NULL;  in cpufreq_userspace_policy_exit()
74 	unsigned int *setspeed = policy->governor_data;  in cpufreq_userspace_policy_start()
76 	BUG_ON(!policy->cur);  in cpufreq_userspace_policy_start()
77 	pr_debug("started managing cpu %u\n", policy->cpu);  in cpufreq_userspace_policy_start()
80 	per_cpu(cpu_is_managed, policy->cpu) = 1;  in cpufreq_userspace_policy_start()
81 	*setspeed = policy->cur;  in cpufreq_userspace_policy_start()
88 	unsigned int *setspeed = policy->governor_data;  in cpufreq_userspace_policy_stop()
90 	pr_debug("managing cpu %u stopped\n", policy->cpu);  in cpufreq_userspace_policy_stop()
93 	per_cpu(cpu_is_managed, policy->cpu) = 0;  in cpufreq_userspace_policy_stop()
100 	unsigned int *setspeed = policy->governor_data;  in cpufreq_userspace_policy_limits()
104 	pr_debug("limit event for cpu %u: %u - %u kHz, currently %u kHz, last set to %u kHz\n",  in cpufreq_userspace_policy_limits()
105 		 policy->cpu, policy->min, policy->max, policy->cur, *setspeed);  in cpufreq_userspace_policy_limits()
107 	if (policy->max < *setspeed)  in cpufreq_userspace_policy_limits()
108 		__cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);  in cpufreq_userspace_policy_limits()
109 	else if (policy->min > *setspeed)  in cpufreq_userspace_policy_limits()
110 		__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);  in cpufreq_userspace_policy_limits()