index 711f9d0..5eb0364 100755
--- a/drivers/power/cw2015_battery.c
+++ b/drivers/power/cw2015_battery.c
@@ -25,6 +25,7 @@
 #include <linux/platform_data/ntc_thermistor.h>
 #include <linux/gpio.h>
 #include <linux/of_gpio.h>
+#include<linux/ktime.h>
 
 
 static int dbg_enable;
@@ -884,12 +885,28 @@ static int cw_bat_resume(struct device *dev)
 {
        struct i2c_client *client = to_i2c_client(dev);
        struct cw_battery *cw_bat = i2c_get_clientdata(client);
+
+       ktime_t calltime, delta, rettime;
+       unsigned long long duration;
+
+       /*获取当前时间*/
+       calltime = ktime_get();
+       
+
        cw_bat->suspend_resume_mark = 1;
        read_persistent_clock(&cw_bat->after);
        cw_bat->after = timespec_sub(cw_bat->after,
                                     cw_bat->suspend_time_before);
        queue_delayed_work(cw_bat->battery_workqueue,
                           &cw_bat->battery_delay_work, msecs_to_jiffies(2));
+
+       /*获取当前时间*/
+       rettime = ktime_get();
+       /*计算时间差 ktime_sub(B,A) 计算A-B的时间差 这时候获取的时间是纳秒*/
+       delta = ktime_sub(rettime,calltime);
+       /*转换成微秒*/
+       duration = (unsigned long long) ktime_to_ns(delta) >> 10;//微秒
+       printk("%s after %lld usecs\n",__FUNCTION__, duration);
        return 0;
 }