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| author | Nick Dyer <nick.dyer@itdev.co.uk> | 2015-08-05 01:57:25 +0200 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2015-08-05 02:03:54 +0200 |
| commit | 885f3fb9fa1f9e185e8a4e905157087495734349 (patch) | |
| tree | c5a51e9357eddd56eecf1dc197cf0568c405fdbe /drivers | |
| parent | Input: atmel_mxt_ts - improve device tree parsing (diff) | |
| download | linux-885f3fb9fa1f9e185e8a4e905157087495734349.tar.xz linux-885f3fb9fa1f9e185e8a4e905157087495734349.zip | |
Input: atmel_mxt_ts - disable interrupt for 50ms after reset
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/input/touchscreen/atmel_mxt_ts.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/input/touchscreen/atmel_mxt_ts.c b/drivers/input/touchscreen/atmel_mxt_ts.c index 08d9a0921798..d36da65f8c72 100644 --- a/drivers/input/touchscreen/atmel_mxt_ts.c +++ b/drivers/input/touchscreen/atmel_mxt_ts.c @@ -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) |