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Input: atmel_mxt_ts - disable interrupt for 50ms after reset

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The CHG/interrupt line is momentarily set (approximately 100 ms) as an
input after power-up or reset for diagnostic purposes. This may cause
spurious interrupts, so disable interrupt handler during this period.

Signed-off-by: Nick Dyer <nick.dyer@itdev.co.uk>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Nick Dyer 2015-08-04 16:57:25 -07:00 committed by Dmitry Torokhov
parent 204476642d
commit 885f3fb9fa
1 changed files with 8 additions and 1 deletions
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9
drivers/input/touchscreen/atmel_mxt_ts.c
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@ -1098,7 +1098,9 @@ static int mxt_soft_reset(struct mxt_data *data)
struct device *dev = &data->client->dev;
int ret = 0;
dev_info(dev, "Resetting chip\n");
dev_info(dev, "Resetting device\n");
disable_irq(data->irq);
reinit_completion(&data->reset_completion);
@ -1106,6 +1108,11 @@ static int mxt_soft_reset(struct mxt_data *data)
if (ret)
return ret;
/* Ignore CHG line for 100ms after reset */
msleep(100);
enable_irq(data->irq);
ret = mxt_wait_for_completion(data, &data->reset_completion,
MXT_RESET_TIMEOUT);
if (ret)