Commit 096d2dac authored by Nuno Sá's avatar Nuno Sá Committed by Jonathan Cameron
Browse files

iio: adc: ad7923: support extended range 



By default the driver was always setting the RANGE bit which means that
the analog input goes from 0 to VREF. However, we might want to have 0
to 2xVREF. This change adds a new Firmware property to allow for the
extended range while keeping the default behavior if nothing is provided.

Signed-off-by: default avatarNuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20220912081223.173584-3-nuno.sa@analog.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent f4f43f01

drivers/iio/adc/ad7923.c

+6 −1
Original line number Diff line number Diff line
@@ -8,6 +8,7 @@ 


#include <linux/device.h>

#include <linux/kernel.h>

#include <linux/property.h>

#include <linux/slab.h>

#include <linux/sysfs.h>

#include <linux/spi/spi.h>
@@ -300,6 +301,7 @@ static void ad7923_regulator_disable(void *data) 


static int ad7923_probe(struct spi_device *spi)

{

	u32 ad7923_range = AD7923_RANGE;

	struct ad7923_state *st;

	struct iio_dev *indio_dev;

	const struct ad7923_chip_info *info;
@@ -311,8 +313,11 @@ static int ad7923_probe(struct spi_device *spi) 


	st = iio_priv(indio_dev);



	if (device_property_read_bool(&spi->dev, "adi,range-double"))

		ad7923_range = 0;



	st->spi = spi;

	st->settings = AD7923_CODING | AD7923_RANGE |

	st->settings = AD7923_CODING | ad7923_range |

			AD7923_PM_MODE_WRITE(AD7923_PM_MODE_OPS);



	info = &ad7923_chip_info[spi_get_device_id(spi)->driver_data];