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iio: adc: ad4170-4: Add support for calibration gain

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Add support for ADC calibration gain configuration.

Signed-off-by: Marcelo Schmitt <marcelo.schmitt@analog.com>
Link: https://patch.msgid.link/ea8d07cad9b7b6106f0b5664c403ed080b362a6b.1751895245.git.marcelo.schmitt@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Marcelo Schmitt
2025-07-14 19:20:51 +01:00
committed by Jonathan Cameron
parent 5731f2a06c
commit be2cdc5cb2
1 changed files with 20 additions and 0 deletions
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drivers/iio/adc/ad4170-4.c
+20
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@@ -626,6 +626,7 @@ static const struct iio_chan_spec ad4170_channel_template = {
.differential = 1,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_CALIBSCALE) |
BIT(IIO_CHAN_INFO_OFFSET),
.info_mask_separate_available = BIT(IIO_CHAN_INFO_SCALE),
.scan_type = {
@@ -948,6 +949,9 @@ static int ad4170_read_raw(struct iio_dev *indio_dev,
pga = FIELD_GET(AD4170_AFE_PGA_GAIN_MSK, setup->afe);
*val = chan_info->offset_tbl[pga];
return IIO_VAL_INT;
case IIO_CHAN_INFO_CALIBSCALE:
*val = setup->gain;
return IIO_VAL_INT;
default:
return -EINVAL;
}
@@ -1062,6 +1066,18 @@ static int ad4170_set_pga(struct ad4170_state *st,
return ad4170_write_channel_setup(st, chan->address, false);
}
static int ad4170_set_calib_gain(struct ad4170_state *st,
struct iio_chan_spec const *chan, int val)
{
struct ad4170_chan_info *chan_info = &st->chan_infos[chan->address];
struct ad4170_setup *setup = &chan_info->setup;
guard(mutex)(&st->lock);
setup->gain = val;
return ad4170_write_channel_setup(st, chan->address, false);
}
static int __ad4170_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int val,
int val2, long info)
@@ -1071,6 +1087,8 @@ static int __ad4170_write_raw(struct iio_dev *indio_dev,
switch (info) {
case IIO_CHAN_INFO_SCALE:
return ad4170_set_pga(st, chan, val, val2);
case IIO_CHAN_INFO_CALIBSCALE:
return ad4170_set_calib_gain(st, chan, val);
default:
return -EINVAL;
}
@@ -1097,6 +1115,8 @@ static int ad4170_write_raw_get_fmt(struct iio_dev *indio_dev,
switch (info) {
case IIO_CHAN_INFO_SCALE:
return IIO_VAL_INT_PLUS_NANO;
case IIO_CHAN_INFO_CALIBSCALE:
return IIO_VAL_INT;
default:
return -EINVAL;
}