Commit 38e8cf7b authored by Dario Binacchi's avatar Dario Binacchi Committed by Dmitry Torokhov
Browse files

Input: edt-ft5x06 - don't recalculate the CRC 



There is no need to recalculate the CRC when the data has not changed.

Signed-off-by: default avatarDario Binacchi <dario.binacchi@amarulasolutions.com>
Link: https://lore.kernel.org/r/20230402200951.1032513-5-dario.binacchi@amarulasolutions.com


Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
parent f8a22570

drivers/input/touchscreen/edt-ft5x06.c

+4 −4
Original line number Diff line number Diff line
@@ -319,7 +319,7 @@ static int edt_ft5x06_register_write(struct edt_ft5x06_ts_data *tsdata, 
static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata,

				    u8 addr)

{

	u8 wrbuf[2], rdbuf[2];

	u8 wrbuf[2], rdbuf[2], crc;

	int error;



	switch (tsdata->version) {
@@ -333,11 +333,11 @@ static int edt_ft5x06_register_read(struct edt_ft5x06_ts_data *tsdata, 
		if (error)

			return error;



		if ((wrbuf[0] ^ wrbuf[1] ^ rdbuf[0]) != rdbuf[1]) {

		crc = wrbuf[0] ^ wrbuf[1] ^ rdbuf[0];

		if (crc != rdbuf[1]) {

			dev_err(&tsdata->client->dev,

				"crc error: 0x%02x expected, got 0x%02x\n",

				wrbuf[0] ^ wrbuf[1] ^ rdbuf[0],

				rdbuf[1]);

				crc, rdbuf[1]);

			return -EIO;

		}

		break;