[PATCH v2 3/8] iio: adc: ad7192: Add update_scan_mode

alexandru.tachici
2022-03-18T16:18:01Z

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>
---
drivers/iio/adc/ad7192.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/drivers/iio/adc/ad7192.c b/drivers/iio/adc/ad7192.c
index 770b4e59238f..adff6472e075 100644
--- a/drivers/iio/adc/ad7192.c
+++ b/drivers/iio/adc/ad7192.c
@@ -783,6 +783,18 @@ 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);
+ int i;
+
+ st->conf &= ~AD7192_CONF_CHAN_MASK;
+ for_each_set_bit(i, scan_mask, 8)
+ st->conf |= AD7192_CONF_CHAN(i);
+
+ return ad_sd_write_reg(&st->sd, AD7192_REG_CONF, 3, st->conf);
+}
+
static const struct iio_info ad7192_info = {
.read_raw = ad7192_read_raw,
.write_raw = ad7192_write_raw,
@@ -790,6 +802,7 @@ 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 +812,7 @@ 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, \
--
2.25.1