| Message ID | 20230505115823.545803-1-p.puschmann@pironex.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 5672bd308ef23b81eb40dd2963f925fd671a66c2 |
| Headers | show |
| Series | Input: edt-ft5x06: Add delay after waking up | expand |
On Fri, May 05, 2023 at 01:58:24PM +0200, Philipp Puschmann wrote: > The touch controller needs some time to wake-up after setting the wake-up > gpio. Without having a delay after wake-up probing regularly fails in > edt_ft5x06_ts_identify() with an error (i.e. EREMOTEIO) that was caused > by a failed i2c transfer. > > The datasheet sets the wake-up time to 5 ms, although it is not entirely > clear. > > Signed-off-by: Philipp Puschmann <p.puschmann@pironex.com> Applied, thank you.
diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c index 24ab9e9f5b21..3a1a5e76cd68 100644 --- a/drivers/input/touchscreen/edt-ft5x06.c +++ b/drivers/input/touchscreen/edt-ft5x06.c @@ -1241,6 +1241,7 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client) if (tsdata->wake_gpio) { usleep_range(5000, 6000); gpiod_set_value_cansleep(tsdata->wake_gpio, 1); + usleep_range(5000, 6000); } if (tsdata->reset_gpio) {
The touch controller needs some time to wake-up after setting the wake-up gpio. Without having a delay after wake-up probing regularly fails in edt_ft5x06_ts_identify() with an error (i.e. EREMOTEIO) that was caused by a failed i2c transfer. The datasheet sets the wake-up time to 5 ms, although it is not entirely clear. Signed-off-by: Philipp Puschmann <p.puschmann@pironex.com> --- drivers/input/touchscreen/edt-ft5x06.c | 1 + 1 file changed, 1 insertion(+)