From: Philipp Puschmann Date: Fri, 5 May 2023 18:48:45 +0000 (-0700) Subject: Input: edt-ft5x06 - add delay after waking up X-Git-Tag: dma-mapping-6.6-2023-08-29~288^2^2~23 X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=5672bd308ef23b81eb40dd2963f925fd671a66c2;p=users%2Fhch%2Fdma-mapping.git Input: edt-ft5x06 - add delay after waking up 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 Link: https://lore.kernel.org/r/20230505115823.545803-1-p.puschmann@pironex.com Signed-off-by: Dmitry Torokhov --- 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) {