Input: cyttsp - set abs params for ABS_MT_TOUCH_MAJOR

The driver is certainly reporting pressure in cyttsp_report_tchdata()
with input_report_abs(input, ABS_MT_TOUCH_MAJOR, tch->z); so we should
also advertise this capability.

Reviewed-by: Javier Martinez Canillas <javier@dowhile0.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210408131153.3446138-8-linus.walleij@linaro.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/touchscreen/cyttsp_core.c b/drivers/input/touchscreen/cyttsp_core.c
index b0477f5..3d605f4 100644 (file)
--- a/drivers/input/touchscreen/cyttsp_core.c
+++ b/drivers/input/touchscreen/cyttsp_core.c
@@ -652,6 +652,9 @@ struct cyttsp *cyttsp_probe(const struct cyttsp_bus_ops *bus_ops,
 
        input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
        input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
+       /* One byte for width 0..255 so this is the limit */
+       input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
+
        touchscreen_parse_properties(input_dev, true, NULL);
 
        error = input_mt_init_slots(input_dev, CY_MAX_ID, 0);