Commit 73cca71a authored by Dario Binacchi's avatar Dario Binacchi Committed by Dmitry Torokhov
Browse files

Input: ti_am335x_tsc - set ADCREFM for X configuration 



As reported by the STEPCONFIG[1-16] registered field descriptions of the
TI reference manual, for the ADC "in single ended, SEL_INM_SWC_3_0 must
be 1xxx".

Unlike the Y and Z coordinates, this bit has not been set for the step
configuration registers used to sample the X coordinate.

Fixes: 1b8be32e ("Input: add support for TI Touchscreen controller")
Signed-off-by: default avatarDario Binacchi <dariobin@libero.it>
Link: https://lore.kernel.org/r/20211212125358.14416-2-dariobin@libero.it


Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent 046612a3

drivers/input/touchscreen/ti_am335x_tsc.c

+2 −1
Original line number Diff line number Diff line
@@ -131,7 +131,8 @@ static void titsc_step_config(struct titsc *ts_dev) 
	u32 stepenable;



	config = STEPCONFIG_MODE_HWSYNC |

			STEPCONFIG_AVG_16 | ts_dev->bit_xp;

			STEPCONFIG_AVG_16 | ts_dev->bit_xp |

			STEPCONFIG_INM_ADCREFM;

	switch (ts_dev->wires) {

	case 4:

		config |= STEPCONFIG_INP(ts_dev->inp_yp) | ts_dev->bit_xn;