diff options
| author | Michael Hennerich <michael.hennerich@analog.com> | 2023-11-29 14:03:53 +0100 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2023-12-04 13:19:48 +0000 |
| commit | e737d495b207592106b38449cc9f402133456062 (patch) | |
| tree | 3b041fd884ffd586787a76506aa2c90be72a0b53 /drivers/iio | |
| parent | d49f69425d0db21c80c11ee537220658262bb7f4 (diff) | |
iio: dac: ad5791: Add support for controlling RBUF via devicetree
This patch adds support for an external amplifier to be connected in a
gain of two configuration.
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20231129-ad5791-michael-stuff-v3-2-48e192b00909@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/dac/ad5791.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/iio/dac/ad5791.c b/drivers/iio/dac/ad5791.c index a4167454da81..75b549827e15 100644 --- a/drivers/iio/dac/ad5791.c +++ b/drivers/iio/dac/ad5791.c @@ -345,6 +345,7 @@ static int ad5791_probe(struct spi_device *spi) struct iio_dev *indio_dev; struct ad5791_state *st; int ret, pos_voltage_uv = 0, neg_voltage_uv = 0; + bool use_rbuf_gain2; indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); if (!indio_dev) @@ -379,6 +380,12 @@ static int ad5791_probe(struct spi_device *spi) st->pwr_down = true; st->spi = spi; + if (pdata) + use_rbuf_gain2 = pdata->use_rbuf_gain2; + else + use_rbuf_gain2 = device_property_read_bool(&spi->dev, + "adi,rbuf-gain2-en"); + if (!IS_ERR(st->reg_vss) && !IS_ERR(st->reg_vdd)) { st->vref_mv = (pos_voltage_uv + neg_voltage_uv) / 1000; st->vref_neg_mv = neg_voltage_uv / 1000; @@ -398,7 +405,7 @@ static int ad5791_probe(struct spi_device *spi) st->ctrl = AD5761_CTRL_LINCOMP(st->chip_info->get_lin_comp(st->vref_mv)) - | ((pdata && pdata->use_rbuf_gain2) ? 0 : AD5791_CTRL_RBUF) | + | (use_rbuf_gain2 ? 0 : AD5791_CTRL_RBUF) | AD5791_CTRL_BIN2SC; ret = ad5791_spi_write(st, AD5791_ADDR_CTRL, st->ctrl | |