Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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>
authored by
Michael Hennerich
and committed by
Jonathan Cameron
e737d495
d49f6942
+8
-1
+8
-1
drivers/iio/dac/ad5791.c
+8
-1
drivers/iio/dac/ad5791.c
···
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struct iio_dev *indio_dev;
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struct ad5791_state *st;
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int ret, pos_voltage_uv = 0, neg_voltage_uv = 0;
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bool use_rbuf_gain2;
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indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
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if (!indio_dev)
···
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st->pwr_down = true;
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st->spi = spi;
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if (pdata)
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use_rbuf_gain2 = pdata->use_rbuf_gain2;
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else
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use_rbuf_gain2 = device_property_read_bool(&spi->dev,
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"adi,rbuf-gain2-en");
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if (!IS_ERR(st->reg_vss) && !IS_ERR(st->reg_vdd)) {
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st->vref_mv = (pos_voltage_uv + neg_voltage_uv) / 1000;
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st->vref_neg_mv = neg_voltage_uv / 1000;
···
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st->ctrl = AD5761_CTRL_LINCOMP(st->chip_info->get_lin_comp(st->vref_mv))
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| ((pdata && pdata->use_rbuf_gain2) ? 0 : AD5791_CTRL_RBUF) |
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| (use_rbuf_gain2 ? 0 : AD5791_CTRL_RBUF) |
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AD5791_CTRL_BIN2SC;
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ret = ad5791_spi_write(st, AD5791_ADDR_CTRL, st->ctrl |