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iio: adc: ad7124: use read_avail() for scale_available

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Replace custom attribute with the standard IIO read_avail() callback
to provide in_voltage_scale_available attribute.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
David Lechner 2025-09-11 16:42:01 -05:00 committed by Jonathan Cameron
parent faf7f9e72a
commit 1b4956cac1
1 changed files with 29 additions and 13 deletions
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42
drivers/iio/adc/ad7124.c
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@ -621,6 +621,33 @@ static const struct ad_sigma_delta_info ad7124_sigma_delta_info = {
.num_resetclks = 64,
};
static const int ad7124_voltage_scales[][2] = {
{ 0, 1164 },
{ 0, 2328 },
{ 0, 4656 },
{ 0, 9313 },
{ 0, 18626 },
{ 0, 37252 },
{ 0, 74505 },
{ 0, 149011 },
{ 0, 298023 },
};
static int ad7124_read_avail(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
const int **vals, int *type, int *length, long info)
{
switch (info) {
case IIO_CHAN_INFO_SCALE:
*vals = (const int *)ad7124_voltage_scales;
*type = IIO_VAL_INT_PLUS_NANO;
*length = ARRAY_SIZE(ad7124_voltage_scales) * 2;
return IIO_AVAIL_LIST;
default:
return -EINVAL;
}
}
static int ad7124_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2, long info)
@ -775,18 +802,6 @@ static int ad7124_reg_access(struct iio_dev *indio_dev,
return ret;
}
static IIO_CONST_ATTR(in_voltage_scale_available,
"0.000001164 0.000002328 0.000004656 0.000009313 0.000018626 0.000037252 0.000074505 0.000149011 0.000298023");
static struct attribute *ad7124_attributes[] = {
&iio_const_attr_in_voltage_scale_available.dev_attr.attr,
NULL,
};
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)
{
@ -816,12 +831,12 @@ static int ad7124_update_scan_mode(struct iio_dev *indio_dev,
}
static const struct iio_info ad7124_info = {
.read_avail = ad7124_read_avail,
.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,
};
/* Only called during probe, so dev_err_probe() can be used */
@ -1011,6 +1026,7 @@ static const struct iio_chan_spec ad7124_channel_template = {
BIT(IIO_CHAN_INFO_OFFSET) |
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
.info_mask_shared_by_type_available = BIT(IIO_CHAN_INFO_SCALE),
.scan_type = {
.sign = 'u',
.realbits = 24,