Input: atmel_mxt_ts - convert to MT protocol B

Atmel touchscreen chips can use MT protocol B because they can assign
unique id to ABS_MT_TRACKING_ID from finger id provided by hardware.

Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Reviewed-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

1 files changed, 15 insertions, 12 deletions

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index 2accf1dffee9..1e61387c73ca 100644
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -17,7 +17,7 @@
 #include <linux/firmware.h>
 #include <linux/i2c.h>
 #include <linux/i2c/atmel_mxt_ts.h>
-#include <linux/input.h>
+#include <linux/input/mt.h>
 #include <linux/interrupt.h>
 #include <linux/slab.h>
 
@@ -504,19 +504,21 @@ static void mxt_input_report(struct mxt_data *data, int single_id)
                 if (!finger[id].status)
                         continue;
 
-                input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
-                                finger[id].status != MXT_RELEASE ?
-                                finger[id].area : 0);
-                input_report_abs(input_dev, ABS_MT_POSITION_X,
-                                finger[id].x);
-                input_report_abs(input_dev, ABS_MT_POSITION_Y,
-                                finger[id].y);
-                input_mt_sync(input_dev);
+                input_mt_slot(input_dev, id);
+                input_mt_report_slot_state(input_dev, MT_TOOL_FINGER,
+                                finger[id].status != MXT_RELEASE);
 
-                if (finger[id].status == MXT_RELEASE)
-                        finger[id].status = 0;
-                else
+                if (finger[id].status != MXT_RELEASE) {
                         finger_num++;
+                        input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR,
+                                        finger[id].area);
+                        input_report_abs(input_dev, ABS_MT_POSITION_X,
+                                        finger[id].x);
+                        input_report_abs(input_dev, ABS_MT_POSITION_Y,
+                                        finger[id].y);
+                } else {
+                        finger[id].status = 0;
+                }
         }
 
         input_report_key(input_dev, BTN_TOUCH, finger_num > 0);
@@ -1094,6 +1096,7 @@ static int __devinit mxt_probe(struct i2c_client *client,
                              0, data->max_y, 0, 0);
 
         /* For multi touch */
+        input_mt_init_slots(input_dev, MXT_MAX_FINGER);
         input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR,
                              0, MXT_MAX_AREA, 0, 0);
         input_set_abs_params(input_dev, ABS_MT_POSITION_X,