1 // SPDX-License-Identifier: GPL-2.0 2 #include <stdio.h> 3 4 #include "cpu.h" 5 #include "fs/fs.h" 6 7 int 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