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Signed-off-by: Marcelo Schmitt --- Change log v2 -> v3 - New patch spun out of the base driver patch. drivers/iio/adc/ad4170.c | 29 ++++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/drivers/iio/adc/ad4170.c b/drivers/iio/adc/ad4170.c index bf19b31095ee..1df214f7fdec 100644 --- a/drivers/iio/adc/ad4170.c +++ b/drivers/iio/adc/ad4170.c @@ -642,7 +642,8 @@ 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_OFFSET), + BIT(IIO_CHAN_INFO_OFFSET) | + BIT(IIO_CHAN_INFO_CALIBSCALE), .info_mask_separate_available = BIT(IIO_CHAN_INFO_SCALE), .scan_type = { .realbits = 24, @@ -953,6 +954,9 @@ 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; } @@ -1079,6 +1083,25 @@ static int ad4170_set_pga(struct ad4170_state *st, return 0; } +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; + u32 old_gain; + int ret; + + guard(mutex)(&st->lock); + old_gain = setup->gain; + setup->gain = val; + + ret = ad4170_write_channel_setup(st, chan->address, false); + if (ret) + setup->gain = old_gain; + + return ret; +} + static int __ad4170_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long info) @@ -1088,6 +1111,8 @@ 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; } @@ -1114,6 +1139,8 @@ 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; }