From: Dario Binacchi dariobin@libero.it
[ Upstream commit 6bfeb6c21e1bdc11c328b7d996d20f0f73c6b9b0 ]
The Z2 step configuration doesn't erase the SEL_INP_SWC_3_0 bit-field before setting the ADC channel. This way its value could be corrupted by the ADC channel selected for the Z1 coordinate.
Fixes: 8c896308feae ("input: ti_am335x_adc: use only FIFO0 and clean up a little") Signed-off-by: Dario Binacchi dariobin@libero.it Link: https://lore.kernel.org/r/20211212125358.14416-3-dariobin@libero.it Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/input/touchscreen/ti_am335x_tsc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/input/touchscreen/ti_am335x_tsc.c b/drivers/input/touchscreen/ti_am335x_tsc.c index fd3ffdd23470b..cfc943423241f 100644 --- a/drivers/input/touchscreen/ti_am335x_tsc.c +++ b/drivers/input/touchscreen/ti_am335x_tsc.c @@ -196,7 +196,10 @@ static void titsc_step_config(struct titsc *ts_dev) STEPCONFIG_OPENDLY);
end_step++; - config |= STEPCONFIG_INP(ts_dev->inp_yn); + config = STEPCONFIG_MODE_HWSYNC | + STEPCONFIG_AVG_16 | ts_dev->bit_yp | + ts_dev->bit_xn | STEPCONFIG_INM_ADCREFM | + STEPCONFIG_INP(ts_dev->inp_yn); titsc_writel(ts_dev, REG_STEPCONFIG(end_step), config); titsc_writel(ts_dev, REG_STEPDELAY(end_step), STEPCONFIG_OPENDLY);