Messages in this thread Patch in this message | | | From | Jiada Wang <> | Subject | [PATCH v11 42/56] input: atmel_mxt_ts: Add Missing Delay for reset handling of Atmel touch panel controller in detachable displays. | Date | Thu, 7 May 2020 22:56:42 -0700 |
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From: keerthikumarp <Keerthikumar.Padmanabha@in.bosch.com>
In case of attached display, the touchpanel reset is controlled via imx gpio's from atmel driver and the delay between touchpanel reset and the time at which the chip becomes capable to communicate with the host processor, has be taken care.
However in case of detachable displays, the touchpanel reset is controlled via a deserializer gpio which is triggered just before the atmel driver is probed.The delay between touchpanel reset and the time at which the chip becomes capable to communicate (as specified in datasheet) was not being accounted for. This patch introduces that delay.
Signed-off-by: keerthikumarp <Keerthikumar.Padmanabha@in.bosch.com> Signed-off-by: George G. Davis <george_davis@mentor.com> Signed-off-by: Jiada Wang <jiada_wang@mentor.com> --- drivers/input/touchscreen/atmel_mxt_ts.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index ceb14b4a8d4d..3ffd49b383f4 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -4105,6 +4105,10 @@ static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id) msleep(MXT_RESET_GPIO_TIME); gpiod_set_value(data->reset_gpio, 1); msleep(MXT_RESET_INVALID_CHG); + } else { + dev_dbg(&client->dev, + "atmel reset pin not found in device tree"); + msleep(MXT_RESET_TIME); } error = mxt_initialize(data); -- 2.17.1
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