[PATCH] Input: stmpe: Add axis inversion and swapping capability

Stefan Riedmueller
2020-09-22T09:54:09Z

Make use of generic touchscreen_properties structure to add axis
inversion and swapping capabilities. It's configurable via devicetree
properties:
touchscreen-inverted-x
touchscreen-inverted-y
touchscreen-swapped-x-y

Signed-off-by: Stefan Riedmueller <s.riedmueller@phytec.de>
---
drivers/input/touchscreen/stmpe-ts.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/input/touchscreen/stmpe-ts.c b/drivers/input/touchscreen/stmpe-ts.c
index 7e16fcfe3b95..cd747725589b 100644
--- a/drivers/input/touchscreen/stmpe-ts.c
+++ b/drivers/input/touchscreen/stmpe-ts.c
@@ -14,6 +14,7 @@
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/input.h>
+#include <linux/input/touchscreen.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/i2c.h>
@@ -72,6 +73,7 @@ struct stmpe_touch {
struct input_dev *idev;
struct delayed_work work;
struct device *dev;
+ struct touchscreen_properties prop;
u8 ave_ctrl;
u8 touch_det_delay;
u8 settling;
@@ -150,8 +152,7 @@ static irqreturn_t stmpe_ts_handler(int irq, void *data)
y = ((data_set[1] & 0xf) << 8) | data_set[2];
z = data_set[3];

- input_report_abs(ts->idev, ABS_X, x);
- input_report_abs(ts->idev, ABS_Y, y);
+ touchscreen_report_pos(ts->idev, &ts->prop, x, y, false);
input_report_abs(ts->idev, ABS_PRESSURE, z);
input_report_key(ts->idev, BTN_TOUCH, 1);
input_sync(ts->idev);
@@ -337,6 +338,8 @@ static int stmpe_input_probe(struct platform_device *pdev)
input_set_abs_params(idev, ABS_Y, 0, XY_MASK, 0, 0);
input_set_abs_params(idev, ABS_PRESSURE, 0x0, 0xff, 0, 0);

+ touchscreen_parse_properties(idev, false, &ts->prop);
+
error = input_register_device(idev);
if (error) {
dev_err(&pdev->dev, "Could not register input device\n");
--
2.25.1