Input: atmel_mxt_ts - report pressure information from the driver

Atmel mxt1386 touch controller has the touch pressure information so
let's report it to the user space.

[dtor@mail.ru: added ABS_RESSURE reporting for ST emulation.]

Signed-off-by: Yufeng Shen <miletus@chromium.org>
Acked-by: Wanlong Gao <gaowanlong@cn.fujitsu.com>
Acked-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c
index ae00604..f5d6685 100644 (file)
--- a/drivers/input/touchscreen/atmel_mxt_ts.c
+++ b/drivers/input/touchscreen/atmel_mxt_ts.c
@@ -244,6 +244,7 @@ struct mxt_finger {
        int x;
        int y;
        int area;
+       int pressure;
 };
 
 /* Each client has this additional data */
@@ -536,6 +537,8 @@ static void mxt_input_report(struct mxt_data *data, int single_id)
                                        finger[id].x);
                        input_report_abs(input_dev, ABS_MT_POSITION_Y,
                                        finger[id].y);
+                       input_report_abs(input_dev, ABS_MT_PRESSURE,
+                                       finger[id].pressure);
                } else {
                        finger[id].status = 0;
                }
@@ -546,6 +549,8 @@ static void mxt_input_report(struct mxt_data *data, int single_id)
        if (status != MXT_RELEASE) {
                input_report_abs(input_dev, ABS_X, finger[single_id].x);
                input_report_abs(input_dev, ABS_Y, finger[single_id].y);
+               input_report_abs(input_dev,
+                                ABS_PRESSURE, finger[single_id].pressure);
        }
 
        input_sync(input_dev);
@@ -560,6 +565,7 @@ static void mxt_input_touchevent(struct mxt_data *data,
        int x;
        int y;
        int area;
+       int pressure;
 
        /* Check the touch is present on the screen */
        if (!(status & MXT_DETECT)) {
@@ -584,6 +590,7 @@ static void mxt_input_touchevent(struct mxt_data *data,
                y = y >> 2;
 
        area = message->message[4];
+       pressure = message->message[5];
 
        dev_dbg(dev, "[%d] %s x: %d, y: %d, area: %d\n", id,
                status & MXT_MOVE ? "moved" : "pressed",
@@ -594,6 +601,7 @@ static void mxt_input_touchevent(struct mxt_data *data,
        finger[id].x = x;
        finger[id].y = y;
        finger[id].area = area;
+       finger[id].pressure = pressure;
 
        mxt_input_report(data, id);
 }
@@ -1116,6 +1124,8 @@ static int __devinit mxt_probe(struct i2c_client *client,
                             0, data->max_x, 0, 0);
        input_set_abs_params(input_dev, ABS_Y,
                             0, data->max_y, 0, 0);
+       input_set_abs_params(input_dev, ABS_PRESSURE,
+                            0, 255, 0, 0);
 
        /* For multi touch */
        input_mt_init_slots(input_dev, MXT_MAX_FINGER);
@@ -1125,6 +1135,8 @@ static int __devinit mxt_probe(struct i2c_client *client,
                             0, data->max_x, 0, 0);
        input_set_abs_params(input_dev, ABS_MT_POSITION_Y,
                             0, data->max_y, 0, 0);
+       input_set_abs_params(input_dev, ABS_MT_PRESSURE,
+                            0, 255, 0, 0);
 
        input_set_drvdata(input_dev, data);
        i2c_set_clientdata(client, data);