Commit fe7d929a authored by Alexandru Tachici's avatar Alexandru Tachici Committed by Jonathan Cameron
Browse files

iio: adc: ad7192: Add update_scan_mode 



The callback .set_channel cannot be used to enable multiple
channels at once, only one is allowed simultaneously.

By adding an update_scan_mode callback, every time the
continuous mode is activated, channels will be enabled/disabled
accordingly.

Signed-off-by: default avatarAlexandru Tachici <alexandru.tachici@analog.com>
Link: https://lore.kernel.org/r/20220322105029.86389-4-alexandru.tachici@analog.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent fd5ba89e

drivers/iio/adc/ad7192.c

+22 −0
Original line number Diff line number Diff line
@@ -783,6 +783,26 @@ static int ad7192_read_avail(struct iio_dev *indio_dev, 
	return -EINVAL;

}



static int ad7192_update_scan_mode(struct iio_dev *indio_dev, const unsigned long *scan_mask)

{

	struct ad7192_state *st = iio_priv(indio_dev);

	u32 conf = st->conf;

	int ret;

	int i;



	conf &= ~AD7192_CONF_CHAN_MASK;

	for_each_set_bit(i, scan_mask, 8)

		conf |= AD7192_CONF_CHAN(i);



	ret = ad_sd_write_reg(&st->sd, AD7192_REG_CONF, 3, conf);

	if (ret < 0)

		return ret;



	st->conf = conf;



	return 0;

}



static const struct iio_info ad7192_info = {

	.read_raw = ad7192_read_raw,

	.write_raw = ad7192_write_raw,
@@ -790,6 +810,7 @@ static const struct iio_info ad7192_info = { 
	.read_avail = ad7192_read_avail,

	.attrs = &ad7192_attribute_group,

	.validate_trigger = ad_sd_validate_trigger,

	.update_scan_mode = ad7192_update_scan_mode,

};



static const struct iio_info ad7195_info = {
@@ -799,6 +820,7 @@ static const struct iio_info ad7195_info = { 
	.read_avail = ad7192_read_avail,

	.attrs = &ad7195_attribute_group,

	.validate_trigger = ad_sd_validate_trigger,

	.update_scan_mode = ad7192_update_scan_mode,

};



#define __AD719x_CHANNEL(_si, _channel1, _channel2, _address, _extend_name, \