Commit cba18232 authored by Miquel Raynal's avatar Miquel Raynal Committed by Jonathan Cameron
Browse files

iio: adc: max1027: Ensure a default cnvst trigger configuration 



We don't expect the (hardware) cnvst trigger to be enabled at boot time,
this is a user choice made in sysfs and there is a dedicated callback to
enable/disable this trigger. Hence, we can just ensure it is disabled in
the probe at initialization time and then assume that whenever a
->read_raw() call happens, the trigger has been disabled and conversions
will start on register write.

Signed-off-by: default avatarMiquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20210921115408.66711-9-miquel.raynal@bootlin.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent c5a39629

drivers/iio/adc/max1027.c

+5 −4
Original line number Diff line number Diff line
@@ -303,10 +303,6 @@ static int max1027_read_single_value(struct iio_dev *indio_dev, 
		return -EBUSY;

	}



	ret = max1027_enable_trigger(indio_dev, false);

	if (ret)

		return ret;



	/* Configure conversion register with the requested chan */

	st->reg = MAX1027_CONV_REG | MAX1027_CHAN(chan->channel) |

		  MAX1027_NOSCAN;
@@ -558,6 +554,11 @@ static int max1027_probe(struct spi_device *spi) 
		return ret;

	}



	/* Assume conversion on register write for now */

	ret = max1027_enable_trigger(indio_dev, false);

	if (ret)

		return ret;



	return devm_iio_device_register(&spi->dev, indio_dev);

}