diff --git a/apps/examples/touchscreen/touchscreen_main.c b/apps/examples/touchscreen/touchscreen_main.c
index 6fae0cef7f..fe8ab80de1 100644
--- a/apps/examples/touchscreen/touchscreen_main.c
+++ b/apps/examples/touchscreen/touchscreen_main.c
@@ -168,14 +168,37 @@ static int touchsceen_specific_cmd(int argc, char*argv[])
 	return OK;
 }
 
+static int touchsceen_suspend(bool cmd)
+{
+	int fd = open(TOUCH_DEV_PATH, O_RDWR);
+	if (fd < 0) {
+		printf("Fail to open %s, errno:%d\n", TOUCH_DEV_PATH, get_errno());
+		return ERROR;
+	}
+
+	if (cmd) {
+		if (ioctl(fd, TSIOC_SUSPEND, NULL) != OK) {
+			printf("Fail to TSIOC_SUSPEND %s, errno:%d\n", TOUCH_DEV_PATH, get_errno());
+		}
+	} else {
+		if (ioctl(fd, TSIOC_RESUME, NULL) != OK) {
+			printf("Fail to TSIOC_RESUME %s, errno:%d\n", TOUCH_DEV_PATH, get_errno());
+		}
+	}
+
+	close(fd);
+	return OK;
+}
 
 static void show_usage(void)
 {
 	printf("usage: touchscreen <command #>\n");
 	printf("Excute touchscreen testing or controling.\n\n");
 	printf("The touchscreen basic test command which printing coordinates and types:\n");
-	printf("    start: Start the touchscreen basic test \n");
-	printf("    stop : Stop  the touchscreen basic test\n");
+	printf("    start   : Start the touchscreen basic test \n");
+	printf("    stop    : Stop  the touchscreen basic test\n");
+	printf("    suspend : Test suspend touchscreen ic operation\n");
+	printf("    resume  : Test reusme touchscreen ic operation\n");
 }
 
 /****************************************************************************
@@ -196,10 +219,14 @@ int touchscreen_main(int argc, char *argv[])
 	}
 
 	if (argc == 2) {
-		if (!strcmp(argv[1], "start")) {
+		if (!strncmp(argv[1], "start", 5)) {
 			return touchsceen_test_start();
-		} else if (!strcmp(argv[1], "stop")) {
+		} else if (!strncmp(argv[1], "stop", 4)) {
 			return touchsceen_test_stop();
+		} else if (!strncmp(argv[1], "suspend", 7)) {
+			return touchsceen_suspend(true);
+		} else if (!strncmp(argv[1], "resume", 6)) {
+			return touchsceen_suspend(false);
 		}
 	}
 
diff --git a/os/drivers/input/ist415.c b/os/drivers/input/ist415.c
index 61ace2adef..06cd848971 100644
--- a/os/drivers/input/ist415.c
+++ b/os/drivers/input/ist415.c
@@ -77,6 +77,8 @@
 static void ist415_enable_touch(struct touchscreen_s *upper);
 static void ist415_disable_touch(struct touchscreen_s *upper);
 static int ist415_cmd(struct touchscreen_s *upper, int argc, char **argv);
+static int ist415_suspend_device(struct touchscreen_s *upper);
+static int ist415_resume_device(struct touchscreen_s *upper);
 static int ist415_process_event(struct ist415_dev_s *dev);
 static void ist415_timer_handler(int argc, uint32_t arg1);
 /****************************************************************************
@@ -91,7 +93,9 @@ struct i2c_config_s g_ist415_i2c_config = {
 static const struct touchscreen_ops_s g_ist415_ops = {
 	ist415_enable_touch,	/* enable */
 	ist415_disable_touch,	/* disable */
-	ist415_cmd				/* cmd */
+	ist415_cmd,             /* cmd */
+	ist415_suspend_device,  /* suspend */
+	ist415_resume_device    /* resume */
 };
 
 /****************************************************************************
@@ -298,8 +302,19 @@ static int ist415_process_event(struct ist415_dev_s *dev)
 				if (p_evt_gesture->gid == GESTURE_DOUBLETAP_WAKEUP) {
 					uint16_t x = ((uint16_t) p_evt_gesture->gdata[1] << 8) | (uint16_t) p_evt_gesture->gdata[0];
 					uint16_t y = ((uint16_t) p_evt_gesture->gdata[3] << 8) | (uint16_t) p_evt_gesture->gdata[2];
+					struct touch_sample_s pdata;
 					ist415vdbg("Double Tap Wakeup~(%d, %d)\n", x, y);
-					// TODO: KnockKnock Event Process~
+					pdata.point[0].id = 0;
+					pdata.point[0].x = x;
+					pdata.point[0].y = y;
+					pdata.point[0].h = 0;
+					pdata.point[0].w = 0;
+					pdata.point[0].pressure = 0;
+					pdata.point[0].flags = TOUCH_DOWN;
+					pdata.npoints = 1;
+					touch_report(dev->upper, &pdata);
+					pdata.point[0].flags = TOUCH_UP;
+					touch_report(dev->upper, &pdata);
 				}
 			} else {
 				ist415wdbg("Not support gesture type:%d\n", p_evt_gesture->gtype);
@@ -483,11 +498,13 @@ static void ist415_power_off(struct ist415_dev_s *dev)
 }
 
 /****************************************************************************
- * Name: ist415_stop_device
+ * Name: ist415_suspend_device
  ****************************************************************************/
 
-static void ist415_stop_device(struct ist415_dev_s *dev)
+static int ist415_suspend_device(struct touchscreen_s *upper)
 {
+	struct ist415_dev_s *dev = upper->priv;
+
 	ist415vdbg("%s\n", __func__);
 
 	dev->suspend = true;
@@ -503,14 +520,18 @@ static void ist415_stop_device(struct ist415_dev_s *dev)
 		ist415_disable(dev);
 		ist415_power_off(dev);
 	}
+
+	return OK;
 }
 
 /****************************************************************************
- * Name: ist415_start_device
+ * Name: ist415_resume_device
  ****************************************************************************/
 
-static void ist415_start_device(struct ist415_dev_s *dev)
+static int ist415_resume_device(struct touchscreen_s *upper)
 {
+	struct ist415_dev_s *dev = upper->priv;
+
 	ist415vdbg("%s\n", __func__);
 
 	dev->suspend = false;
@@ -525,6 +546,8 @@ static void ist415_start_device(struct ist415_dev_s *dev)
 		ist415_enable(dev);
 		ist415_start(dev);
 	}
+
+	return OK;
 }
 
 /****************************************************************************
@@ -1080,7 +1103,7 @@ int ist415_initialize(const char *path, struct i2c_dev_s *i2c, struct ist415_con
 
 	dev->sys_mode = SYS_MODE_TOUCH;
 	dev->touch_type = (1 << TOUCH_TYPE_NORMAL) | (1 << TOUCH_TYPE_WET) | (1 << TOUCH_TYPE_PALMLARGE);
-	dev->knockknock = false;
+	dev->knockknock = true;
 
 	dev->irq_working = false;
 	dev->event_mode = false;
diff --git a/os/drivers/input/touchscreen.c b/os/drivers/input/touchscreen.c
index 3e1de9044a..5b8a6d9ffa 100755
--- a/os/drivers/input/touchscreen.c
+++ b/os/drivers/input/touchscreen.c
@@ -304,6 +304,20 @@ static int touch_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 				ret = -EINVAL;
 			}
 		break;
+		case TSIOC_SUSPEND:
+			if (priv->ops && priv->ops->suspend) {
+				ret = priv->ops->suspend(priv);
+			} else {
+				ret = -EINVAL;
+			}
+		break;
+		case TSIOC_RESUME:
+			if (priv->ops && priv->ops->resume) {
+				ret = priv->ops->resume(priv);
+			} else {
+				ret = -EINVAL;
+			}
+		break;
 		default: {
 			touchdbg("ERROR: ioctl not found, cmd: %d\n", cmd);
 		}
diff --git a/os/include/tinyara/input/touchscreen.h b/os/include/tinyara/input/touchscreen.h
index bfc5c52fc5..3503851294 100644
--- a/os/include/tinyara/input/touchscreen.h
+++ b/os/include/tinyara/input/touchscreen.h
@@ -84,8 +84,8 @@
 #define TSIOC_GETCALIB       _TSIOC(0x0002)  /* arg: Pointer to int calibration value */
 #define TSIOC_SETFREQUENCY   _TSIOC(0x0003)  /* arg: Pointer to uint32_t frequency value */
 #define TSIOC_GETFREQUENCY   _TSIOC(0x0004)  /* arg: Pointer to uint32_t frequency value */
-#define TSIOC_DISABLE        _TSIOC(0x0005)  /* Disable touch interrupt */
-#define TSIOC_ENABLE         _TSIOC(0x0006)  /* Enable touch interrupt */
+#define TSIOC_SUSPEND        _TSIOC(0x0005)  /* Suspend touch interrupt */
+#define TSIOC_RESUME         _TSIOC(0x0006)  /* Resume touch interrupt */
 #define TSIOC_SETAPPNOTIFY   _TSIOC(0x0007)  /* arg: Pointer to struct touch_set_callback_s. Support available only when CONFIG_TOUCH_CALLBACK is enabled */
 #define TSIOC_CMD            _TSIOC(0x0008)  /* arg: Pointer to struct touchscreen_cmd_s */
 #define TSC_FIRST            0x0001          /* First common command */
@@ -201,6 +201,8 @@ struct touchscreen_ops_s {
 	void (*touch_enable)(struct touchscreen_s *upper);			/* Enable touch */
 	void (*touch_disable)(struct touchscreen_s *upper);			/* Disable touch */
 	int (*cmd)(struct touchscreen_s *upper, int argc, char **argv);
+	int (*suspend)(struct touchscreen_s *upper);			/* Suspend touch */
+	int (*resume)(struct touchscreen_s *upper);			/* Resume touch */
 };
 
 /*