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Input: edt-ft5x06 - add delay after waking up

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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>
Link: https://lore.kernel.org/r/20230505115823.545803-1-p.puschmann@pironex.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Philipp Puschmann 2023-05-05 11:48:45 -07:00 committed by Dmitry Torokhov
parent 3c98b8dbdc
commit 5672bd308e
1 changed files with 1 additions and 0 deletions
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1
drivers/input/touchscreen/edt-ft5x06.c
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@ -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) {