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Commit 3008d082 authored by Peter Meerwald's avatar Peter Meerwald Committed by Jonathan Cameron
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iio:adc:ad799x: Allow writing of event config 



Allows explicity enabling of events

Previously, events were always reported as enabled, but actually only
implicitly enabled when updating the buffer scan mode

Signed-off-by: default avatarPeter Meerwald <pmeerw@pmeerw.net>
Acked-by: default avatarLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
parent 1d15330a

drivers/iio/adc/ad799x.c

+34 −0
Original line number Diff line number Diff line
@@ -375,6 +375,39 @@ static int ad799x_read_event_config(struct iio_dev *indio_dev, 
	return 0;

}



static int ad799x_write_event_config(struct iio_dev *indio_dev,

				     const struct iio_chan_spec *chan,

				     enum iio_event_type type,

				     enum iio_event_direction dir,

				     int state)

{

	struct ad799x_state *st = iio_priv(indio_dev);

	int ret;



	mutex_lock(&indio_dev->mlock);

	if (iio_buffer_enabled(indio_dev)) {

		ret = -EBUSY;

		goto done;

	}



	if (state)

		st->config |= BIT(chan->scan_index) << AD799X_CHANNEL_SHIFT;

	else

		st->config &= ~(BIT(chan->scan_index) << AD799X_CHANNEL_SHIFT);



	if (st->config >> AD799X_CHANNEL_SHIFT)

		st->config |= AD7998_ALERT_EN;

	else

		st->config &= ~AD7998_ALERT_EN;



	ret = ad799x_write_config(st, st->config);



done:

	mutex_unlock(&indio_dev->mlock);



	return ret;

}



static unsigned int ad799x_threshold_reg(const struct iio_chan_spec *chan,

					 enum iio_event_direction dir,

					 enum iio_event_info info)
@@ -502,6 +535,7 @@ static const struct iio_info ad7993_4_7_8_irq_info = { 
	.read_raw = &ad799x_read_raw,

	.event_attrs = &ad799x_event_attrs_group,

	.read_event_config = &ad799x_read_event_config,

	.write_event_config = &ad799x_write_event_config,

	.read_event_value = &ad799x_read_event_value,

	.write_event_value = &ad799x_write_event_value,

	.driver_module = THIS_MODULE,