| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame^] | 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 | } | ||||