cpupower/lib/cpufreq.h

1 /* SPDX-License-Identifier: GPL-2.0-only */
3  *  cpufreq.h - definitions for libcpufreq
5  *  Copyright (C) 2004-2009  Dominik Brodowski <linux@dominikbrodowski.de>
50  * - _kernel variant means kernel's opinion of CPU frequency
51  * - _hardware variant means actual hardware CPU frequency,
66  * returns 0 on failure, else transition latency in 10^(-9) s = nanoseconds
74  * considerations by cpufreq policy notifiers in the kernel.
93 /* determine CPUfreq policy currently used
102 void cpufreq_put_policy(struct cpufreq_policy *policy);
122  * Only present on _some_ ->target() cpufreq drivers. For information purposes
166  * This is not available in all kernel versions or configurations.
177 /* set new cpufreq policy
179  * Tries to set the passed policy as new policy as close as possible,
183 int cpufreq_set_policy(unsigned int cpu, struct cpufreq_policy *policy);
186 /* modify a policy by only changing min/max freq or governor
200  * occurs. Also does not work on ->range() cpufreq drivers.