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iio: adc: ad7192: Add update_scan_mode

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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: Alexandru Tachici <alexandru.tachici@analog.com>
Link: https://lore.kernel.org/r/20220322105029.86389-4-alexandru.tachici@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandru Tachici 2022-03-22 12:50:26 +02:00 committed by Jonathan Cameron
parent fd5ba89e4c
commit fe7d929a63
1 changed files with 22 additions and 0 deletions
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22
drivers/iio/adc/ad7192.c
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@ -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, \