LXR linux/tools/lib/api/cpu.c

   1// SPDX-License-Identifier: GPL-2.0
   2#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