[PATCH v3 4/9] input: elants: override touchscreen info with DT properties

From: MichaÅ MirosÅaw
Date: Mon Apr 13 2020 - 09:32:36 EST


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@xxxxxxxxx>
[moved "prop" before DMA buffer]
Signed-off-by: MichaÅ MirosÅaw <mirq-linux@xxxxxxxxxxxx>
---
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 fcd3d189f184..87d686ce08f2 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);

@@ -1329,6 +1330,8 @@ 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_register_device(ts->input);
if (error) {
dev_err(&client->dev,
--
2.20.1