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iio: adc: ad7124: Add update_scan_mode 

The callback .set_channel cannot be used to enable and
disable multiple channels at once as they are presented
in the active_scan_mask.

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/20220322105029.86389-3-alexandru.tachici@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandru Tachici 2022-03-22 12:50:25 +02:00 committed by Jonathan Cameron
parent fe78ccf79b
commit fd5ba89e4c
1 changed files with 21 additions and 0 deletions
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21
drivers/iio/adc/ad7124.c
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@ -669,11 +669,32 @@ static const struct attribute_group ad7124_attrs_group = {
.attrs = ad7124_attributes,
};
static int ad7124_update_scan_mode(struct iio_dev *indio_dev,
const unsigned long *scan_mask)
{
struct ad7124_state *st = iio_priv(indio_dev);
bool bit_set;
int ret;
int i;
for (i = 0; i < st->num_channels; i++) {
bit_set = test_bit(i, scan_mask);
ret = ad7124_spi_write_mask(st, AD7124_CHANNEL(i),
AD7124_CHANNEL_EN_MSK,
AD7124_CHANNEL_EN(bit_set),
2);
if (ret < 0)
return ret;
}
return 0;
}
static const struct iio_info ad7124_info = {
.read_raw = ad7124_read_raw,
.write_raw = ad7124_write_raw,
.debugfs_reg_access = &ad7124_reg_access,
.validate_trigger = ad_sd_validate_trigger,
.update_scan_mode = ad7124_update_scan_mode,
.attrs = &ad7124_attrs_group,
};