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input: ft5x06_ts: Add support for protocol B

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

This patch is propagated from 3.18 kernel
'commit 836a4745d978 ("input: ft5x06_ts: Add support
for protocol B")'

Change-Id: I7f236d819eb805934e12faedaf84407b9de95c0e
Signed-off-by: Mohan Pallaka <mpallaka@codeaurora.org>
Signed-off-by: Shantanu Jain <shjain@codeaurora.org>
This commit is contained in:
Mohan Pallaka 2013-06-14 17:12:24 +05:30 • committed by Gerrit - the friendly Code Review server
parent a5b633b984
commit 19bdb8e2d1
1 changed files with 18 additions and 13 deletions
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11
drivers/input/touchscreen/ft5x06_ts.c
View file

@ -18,6 +18,7 @@
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/input/mt.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
@ -298,6 +299,11 @@ static void ft5x06_report_value(struct ft5x06_ts_data *data)
event->pressure = 0;
}
input_mt_slot(data->input_dev, i);
input_mt_report_slot_state(data->input_dev, MT_TOOL_FINGER,
!!event->pressure);
if (event->pressure == FT_PRESS) {
input_report_abs(data->input_dev, ABS_MT_POSITION_X,
event->x[i]);
input_report_abs(data->input_dev, ABS_MT_POSITION_Y,
@ -308,7 +314,7 @@ static void ft5x06_report_value(struct ft5x06_ts_data *data)
event->finger_id[i]);
input_report_abs(data->input_dev, ABS_MT_TOUCH_MAJOR,
event->pressure);
input_mt_sync(data->input_dev);
}
}
input_report_key(data->input_dev, BTN_TOUCH, !!fingerdown);
@ -1187,12 +1193,11 @@ static int ft5x06_ts_probe(struct i2c_client *client,
__set_bit(BTN_TOUCH, input_dev->keybit);
__set_bit(INPUT_PROP_DIRECT, input_dev->propbit);
input_mt_init_slots(input_dev, CFG_MAX_TOUCH_POINTS);
input_set_abs_params(input_dev, ABS_MT_POSITION_X, pdata->x_min,
pdata->x_max, 0, 0);
input_set_abs_params(input_dev, ABS_MT_POSITION_Y, pdata->y_min,
pdata->y_max, 0, 0);
input_set_abs_params(input_dev, ABS_MT_TRACKING_ID, 0,
CFG_MAX_TOUCH_POINTS, 0, 0);
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, FT_PRESS, 0, 0);
input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, FT_PRESS, 0, 0);