From 885f3fb9fa1f9e185e8a4e905157087495734349 Mon Sep 17 00:00:00 2001 From: Nick Dyer Date: Tue, 4 Aug 2015 16:57:25 -0700 Subject: [PATCH] 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 Signed-off-by: Dmitry Torokhov --- drivers/input/touchscreen/atmel_mxt_ts.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) 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) -- 2.20.1