1 files changed, 27 insertions, 0 deletions

diff --git a/Documentation/timers/hpet_example.c b/Documentation/timers/hpet_example.c
index 4bfafb7bc4c5..9a3e7012c190 100644
--- a/Documentation/timers/hpet_example.c
+++ b/Documentation/timers/hpet_example.c
@@ -97,6 +97,33 @@ hpet_open_close(int argc, const char **argv)
 void
 hpet_info(int argc, const char **argv)
 {
+        struct hpet_info        info;
+        int                     fd;
+
+        if (argc != 1) {
+                fprintf(stderr, "hpet_info: device-name\n");
+                return;
+        }
+
+        fd = open(argv[0], O_RDONLY);
+        if (fd < 0) {
+                fprintf(stderr, "hpet_info: open of %s failed\n", argv[0]);
+                return;
+        }
+
+        if (ioctl(fd, HPET_INFO, &info) < 0) {
+                fprintf(stderr, "hpet_info: failed to get info\n");
+                goto out;
+        }
+
+        fprintf(stderr, "hpet_info: hi_irqfreq 0x%lx hi_flags 0x%lx ",
+                info.hi_ireqfreq, info.hi_flags);
+        fprintf(stderr, "hi_hpet %d hi_timer %d\n",
+                info.hi_hpet, info.hi_timer);
+
+out:
+        close(fd);
+        return;
 }
 
 void