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Input: ads7846 - don't check penirq immediately for 7845

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To discard false readings, one should use "ti,penirq-recheck-delay-usecs".
Checking get_pendown_state() at the beginning, most of the time fails
causing malfunctioning.

Fixes: ffa458c1bd ("spi: ads7846 driver")
Signed-off-by: Luca Ellero <l.ellero@asem.it>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/20230126105227.47648-4-l.ellero@asem.it
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Luca Ellero 2023-01-26 11:52:27 +01:00 committed by Dmitry Torokhov
parent 13f82ca387
commit fa9f4275b2
1 changed files with 1 additions and 7 deletions
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8
drivers/input/touchscreen/ads7846.c
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@ -843,14 +843,8 @@ static void ads7846_report_state(struct ads7846 *ts)
if (x == MAX_12BIT)
x = 0;
if (ts->model == 7843) {
if (ts->model == 7843 || ts->model == 7845) {
Rt = ts->pressure_max / 2;
} else if (ts->model == 7845) {
if (get_pendown_state(ts))
Rt = ts->pressure_max / 2;
else
Rt = 0;
dev_vdbg(&ts->spi->dev, "x/y: %d/%d, PD %d\n", x, y, Rt);
} else if (likely(x && z1)) {
/* compute touch pressure resistance using equation #2 */
Rt = z2;