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| author | Dario Binacchi <dario.binacchi@amarulasolutions.com> | 2023-04-03 07:27:34 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2023-04-03 07:37:56 +0300 |
| commit | 38e8cf7b97612a7e615e498987bd0758a65633c6 (patch) | |
| tree | c69decc0afb32953318bfa3fb318d586cc025fbe /drivers/input | |
| parent | f8a2257056d9e60e4339072e8e89a5a708a99d40 (diff) | |
| download | linux-38e8cf7b97612a7e615e498987bd0758a65633c6.tar.xz | |
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: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Link: https://lore.kernel.org/r/20230402200951.1032513-5-dario.binacchi@amarulasolutions.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/touchscreen/edt-ft5x06.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c index c96fe6520578..d4f39724b259 100644 --- a/drivers/input/touchscreen/edt-ft5x06.c +++ b/drivers/input/touchscreen/edt-ft5x06.c @@ -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; |