[PATCH v4 04/10] input: elants: override touchscreen info with DT properties

["Michał Mirosław" <mirq-linux@rere.qmqm.pl>]

Allow overriding of information from hardware and support additional
common DT properties like axis inversion. This is required for eg.
Nexus 7 and TF300T where the programmed values in firmware differ
from reality.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
[moved "prop" before DMA buffer]
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
---
 drivers/input/touchscreen/elants_i2c.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
index 58aa9b7dbcbf..c08a7971cd32 100644
--- a/drivers/input/touchscreen/elants_i2c.c
+++ b/drivers/input/touchscreen/elants_i2c.c
@@ -32,6 +32,7 @@
 #include <linux/slab.h>
 #include <linux/firmware.h>
 #include <linux/input/mt.h>
+#include <linux/input/touchscreen.h>
 #include <linux/acpi.h>
 #include <linux/of.h>
 #include <linux/gpio/consumer.h>
@@ -150,6 +151,7 @@ struct elants_data {
 	unsigned int y_res;
 	unsigned int x_max;
 	unsigned int y_max;
+	struct touchscreen_properties prop;
 
 	enum elants_state state;
 	enum elants_iap_mode iap_mode;
@@ -894,8 +896,7 @@ static void elants_i2c_mt_event(struct elants_data *ts, u8 *buf,
 
 			input_mt_slot(input, i);
 			input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
-			input_event(input, EV_ABS, ABS_MT_POSITION_X, x);
-			input_event(input, EV_ABS, ABS_MT_POSITION_Y, y);
+			touchscreen_report_pos(input, &ts->prop, x, y, true);
 			input_event(input, EV_ABS, ABS_MT_PRESSURE, p);
 			input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, w);
 
@@ -1322,6 +1323,8 @@ static int elants_i2c_probe(struct i2c_client *client,
 	input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->y_res);
 	input_abs_set_res(ts->input, ABS_MT_TOUCH_MAJOR, 1);
 
+	touchscreen_parse_properties(ts->input, true, &ts->prop);
+
 	error = input_mt_init_slots(ts->input, MAX_CONTACT_NUM,
 				    INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
 	if (error) {
-- 
2.20.1