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-rw-r--r--kernel/tools/lib/api/cpu.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/kernel/tools/lib/api/cpu.c b/kernel/tools/lib/api/cpu.c
new file mode 100644
index 000000000..8c6489356
--- /dev/null
+++ b/kernel/tools/lib/api/cpu.c
@@ -0,0 +1,18 @@
+#include <stdio.h>
+
+#include "cpu.h"
+#include "fs/fs.h"
+
+int cpu__get_max_freq(unsigned long long *freq)
+{
+ char entry[PATH_MAX];
+ int cpu;
+
+ if (sysfs__read_int("devices/system/cpu/online", &cpu) < 0)
+ return -1;
+
+ snprintf(entry, sizeof(entry),
+ "devices/system/cpu/cpu%d/cpufreq/cpuinfo_max_freq", cpu);
+
+ return sysfs__read_ull(entry, freq);
+}