Tap2Unlock - a new screen wake feature similar to d2w and s2w

But with patterns here
How it works ?
Divide your screen vertically and horizontally , you get four divisions
They are numbered as
          1 | 2
          -----
          3 | 4
The pattern is stored in sysfs file sys/android_touch/tap2unlock_pattern
You tap the right combination to open your screen
Pressing the power button will turn your display on but not the touch sensor.

version 1.0
-Ability - 4 number pattern (will be improved)
-Currently the pattern gets rstored to 1234 after every boot
(This can only be fixed if a kernel mod app provides support for it in the future.)

All copyrights of t2u is reserved with goutamniwas <goutamniwas@gmail.com>
Many credits to showp-1984 for his D2w which made this possible.

arch/arm/configs/cm_condor_defconfig

@@ -296,6 +296,7 @@ CONFIG_INPUT_GPIO=m
 CONFIG_TOUCHSCREEN_PREVENT_SLEEP=y
 CONFIG_TOUCHSCREEN_SWEEP2WAKE=y
 CONFIG_TOUCHSCREEN_DOUBLETAP2WAKE=y
+CONFIG_TOUCHSCREEN_TAP2UNLOCK=y
 #CONFIG_INPUT_MOUSEDEV is not set
 CONFIG_INPUT_CT406=y
 CONFIG_INPUT_KEYCHORD=y

drivers/input/touchscreen/Kconfig

@@ -1135,6 +1135,11 @@ config TOUCHSCREEN_DOUBLETAP2WAKE
 	select TOUCHSCREEN_PREVENT_SLEEP
 	default y
 
+config TOUCHSCREEN_TAP2UNLOCK
+	tristate "Tap to unlock for touchscreens"
+	select TOUCHSCREEN_PREVENT_SLEEP
+	default y
+
 config TOUCHSCREEN_POWERSUSPEND
 	tristate "powersuspend for dtw and s2w"
 	default y

drivers/input/touchscreen/Makefile

@@ -1,4 +1,3 @@
-#
 # Makefile for the touchscreen drivers.
 #
 
@@ -103,3 +102,4 @@ obj-$(CONFIG_TOUCHSCREEN_SYNAPTICS_DSX_FW_UPDATE_MMI) += synaptics_dsx_fw_update
 obj-$(CONFIG_TOUCHSCREEN_SWEEP2WAKE) += sweep2wake.o
 # for doubletap2wake, leave 1st to avoid merge issues at the end of the file
 obj-$(CONFIG_TOUCHSCREEN_DOUBLETAP2WAKE) += doubletap2wake.o
+obj-$(CONFIG_TOUCHSCREEN_TAP2UNLOCK) += tap2unlock.o

drivers/input/touchscreen/doubletap2wake.c

@@ -421,3 +421,4 @@ static void __exit doubletap2wake_exit(void)
 module_init(doubletap2wake_init);
 module_exit(doubletap2wake_exit);
 
+

drivers/input/touchscreen/synaptics_dsx_i2c.c

@@ -47,6 +47,9 @@ extern bool prox_covered;
 #ifdef CONFIG_TOUCHSCREEN_DOUBLETAP2WAKE
 #include <linux/input/doubletap2wake.h>
 #endif
+#ifdef CONFIG_TOUCHSCREEN_TAP2UNLOCK
+#include <linux/input/tap2unlock.h>
+#endif
 #endif
 
 #define DRIVER_NAME "synaptics_dsx_i2c"
@@ -3700,8 +3703,15 @@ static int synaptics_rmi4_suspend(struct device *dev)
 	const struct synaptics_dsx_platform_data *platform_data =
 			rmi4_data->board;
 #ifdef CONFIG_TOUCHSCREEN_PREVENT_SLEEP
-	 if (s2w_switch > 0 || dt2w_switch > 0) {
+pr_info("t2u :suspend called ,t2u_allow %d , t2u_scr_suspended %d ", t2u_allow, t2u_scr_suspended);
+	 if (t2u_switch > 0 && t2u_allow == false && t2u_scr_suspended == false) {
+		pr_info("t2u : going to t2u_force_suspend");
+		goto t2u_force_suspend;
+	}
+	 if (s2w_switch > 0 || dt2w_switch > 0 || t2u_switch > 0) {
+
 	 if (prox_covered) {
+	 t2u_force_suspend:
 #endif
 
 	 synaptics_dsx_sensor_state(rmi4_data, STATE_SUSPEND);
@@ -3726,15 +3736,16 @@ static int synaptics_rmi4_suspend(struct device *dev)
 		rmi4_data->touch_stopped = true;
 	 }
 #ifdef CONFIG_TOUCHSCREEN_PREVENT_SLEEP
-		} else {
+	} else {
 			pr_info("suspend avoided!\n");
 			return 0;
-		}
+	}
  	}
 #endif
 
 	return 0;
 }
+
 #ifdef CONFIG_TOUCHSCREEN_PREVENT_SLEEP
 void touch_suspend(void)
 {
@@ -3756,6 +3767,15 @@ static int synaptics_rmi4_resume(struct device *dev)
 {
 	struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev);
 
+#ifdef CONFIG_TOUCHSCREEN_PREVENT_SLEEP
+pr_info("t2u :suspend called ,t2u_allow %d , t2u_scr_suspended %d ", t2u_allow, t2u_scr_suspended);
+	 if (t2u_switch > 0 && t2u_allow == false && t2u_scr_suspended == false) {
+		pr_info("t2u : touch sensor awake blocked by t2u protect");
+		return 0;
+	}
+#endif
+
+
 	synaptics_dsx_resumeinfo_start(rmi4_data);
 
 	if (rmi4_data->touch_stopped) {
@@ -3808,6 +3828,8 @@ static int synaptics_rmi4_resume(struct device *dev)
 	synaptics_dsx_resumeinfo_finish(rmi4_data);
 
 	return 0;
+
+
 }
 
 #ifdef CONFIG_TOUCHSCREEN_PREVENT_SLEEP