This is a note to let you know that I've just added the patch titled Input: ads7846 - don't check penirq immediately for 7845 to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: input-ads7846-don-t-check-penirq-immediately-for-784.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 93cd092ad80afbff876dc9bf76a6ec9f843cca73 Author: Luca Ellero <l.ellero@xxxxxxx> Date: Thu Jan 26 11:52:27 2023 +0100 Input: ads7846 - don't check penirq immediately for 7845 [ Upstream commit fa9f4275b20ec7b2a8fb05c66362d10b36f9efec ] 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: ffa458c1bd9b ("spi: ads7846 driver") Signed-off-by: Luca Ellero <l.ellero@xxxxxxx> Reviewed-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20230126105227.47648-4-l.ellero@xxxxxxx Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index 491cc7efecf9e..fe6c9e1870414 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -790,14 +790,8 @@ 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;