start io subsystem

driver/trigger.c

@@ -12,6 +12,7 @@
 #include <linux/timekeeping.h>
 
 #include "ls7366r.h"
+#include "leds.h"
 
 
 
@@ -65,12 +66,9 @@ static void counter_worker(struct work_struct *work) {
 
   if (data->last_value) {
     u32 period = counter_value - data->last_value;
-    struct timespec64 duration = timespec64_sub(data->current_timestamp, data->last_timestamp);
-    printk("counter %lld.%09lu %lld.%09lu %u\n", 
+    printk("counter %lld.%09lu %u\n", 
         (s64)((data->current_timestamp).tv_sec), 
         ((data->current_timestamp).tv_nsec), 
-        (s64)duration.tv_sec,
-        duration.tv_nsec,
         period);