20 lines · c
1// SPDX-License-Identifier: GPL-2.02#include <stdio.h>3 4#include "cpu.h"5#include "fs/fs.h"6 7int cpu__get_max_freq(unsigned long long *freq)8{9 char entry[PATH_MAX];10 int cpu;11 12 if (sysfs__read_int("devices/system/cpu/online", &cpu) < 0)13 return -1;14 15 snprintf(entry, sizeof(entry),16 "devices/system/cpu/cpu%d/cpufreq/cpuinfo_max_freq", cpu);17 18 return sysfs__read_ull(entry, freq);19}20