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Input: stmfts - set IRQ_NOAUTOEN to the irq flag

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[ Upstream commit cba04cdf43 ]

The interrupt is requested before the device is powered on and
it's value in some cases cannot be reliable. It happens on some
devices that an interrupt is generated as soon as requested
before having the chance to disable the irq.

Set the irq flag as IRQ_NOAUTOEN before requesting it.

This patch mutes the error:

  stmfts 2-0049: failed to read events: -11

received sometimes during boot time.

Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Andi Shyti
2018-01-22 17:32:46 -08:00
committed by Greg Kroah-Hartman
parent 8afed2798e
commit 6a5505da41
1 changed files with 8 additions and 3 deletions
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11
drivers/input/touchscreen/stmfts.c
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@@ -687,6 +687,14 @@ static int stmfts_probe(struct i2c_client *client,
input_set_drvdata(sdata->input, sdata);
/*
* stmfts_power_on expects interrupt to be disabled, but
* at this point the device is still off and I do not trust
* the status of the irq line that can generate some spurious
* interrupts. To be on the safe side it's better to not enable
* the interrupts during their request.
*/
irq_set_status_flags(client->irq, IRQ_NOAUTOEN);
err = devm_request_threaded_irq(&client->dev, client->irq,
NULL, stmfts_irq_handler,
IRQF_ONESHOT,
@@ -694,9 +702,6 @@ static int stmfts_probe(struct i2c_client *client,
if (err)
return err;
/* stmfts_power_on expects interrupt to be disabled */
disable_irq(client->irq);
dev_dbg(&client->dev, "initializing ST-Microelectronics FTS...\n");
err = stmfts_power_on(sdata);