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Message-ID: <91ce7874-8087-434a-99f4-558da412577a@baylibre.com>
Date: Tue, 1 Oct 2024 11:26:17 +0200
From: Guillaume Stols <gstols@...libre.com>
To: Alexandru Ardelean <aardelean@...libre.com>, linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Cc: jic23@...nel.org, krzk+dt@...nel.org, robh@...nel.org, lars@...afoo.de,
michael.hennerich@...log.com, dlechner@...libre.com
Subject: Re: [PATCH v7 8/8] iio: adc: ad7606: add support for AD7606C-{16,18}
parts
On 10/1/24 10:26, Alexandru Ardelean wrote:
> On Thu, Sep 19, 2024 at 4:05 PM Alexandru Ardelean
> <aardelean@...libre.com> wrote:
>> The AD7606C-16 and AD7606C-18 are pretty similar with the AD7606B.
>> The main difference between AD7606C-16 & AD7606C-18 is the precision in
>> bits (16 vs 18).
>> Because of that, some scales need to be defined for the 18-bit variants, as
>> they need to be computed against 2**18 (vs 2**16 for the 16 bit-variants).
>>
>> Because the AD7606C-16,18 also supports bipolar & differential channels,
>> for SW-mode, the default range of 10 V or ±10V should be set at probe.
>> On reset, the default range (in the registers) is set to value 0x3 which
>> corresponds to '±10 V single-ended range', regardless of bipolar or
>> differential configuration.
>>
>> Aside from the scale/ranges, the AD7606C-16 is similar to the AD7606B.
>>
>> The AD7606C-18 variant offers 18-bit precision. Because of this, the
>> requirement to use this chip is that the SPI controller supports padding
>> of 18-bit sequences to 32-bit arrays.
>>
>> Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ad7606c-16.pdf
>> Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/ad7606c-18.pdf
>>
>> Signed-off-by: Alexandru Ardelean <aardelean@...libre.com>
>> ---
>> drivers/iio/adc/ad7606.c | 263 +++++++++++++++++++++++++++++++++--
>> drivers/iio/adc/ad7606.h | 16 ++-
>> drivers/iio/adc/ad7606_spi.c | 55 ++++++++
>> 3 files changed, 322 insertions(+), 12 deletions(-)
>>
>> diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
>> index b909ee14fd81..f04e5660d2f8 100644
>> --- a/drivers/iio/adc/ad7606.c
>> +++ b/drivers/iio/adc/ad7606.c
>> @@ -36,6 +36,33 @@ static const unsigned int ad7606_16bit_hw_scale_avail[2] = {
>> 152588, 305176
>> };
>>
>> +static const unsigned int ad7606_18bit_hw_scale_avail[2] = {
>> + 38147, 76294
>> +};
>> +
>> +static const unsigned int ad7606c_16bit_single_ended_unipolar_scale_avail[3] = {
>> + 76294, 152588, 190735,
>> +};
>> +
>> +static const unsigned int ad7606c_16bit_single_ended_bipolar_scale_avail[5] = {
>> + 76294, 152588, 190735, 305176, 381470
>> +};
>> +
>> +static const unsigned int ad7606c_16bit_differential_bipolar_scale_avail[4] = {
>> + 152588, 305176, 381470, 610352
>> +};
>> +
>> +static const unsigned int ad7606c_18bit_single_ended_unipolar_scale_avail[3] = {
>> + 19073, 38147, 47684
>> +};
>> +
>> +static const unsigned int ad7606c_18bit_single_ended_bipolar_scale_avail[5] = {
>> + 19073, 38147, 47684, 76294, 95367
>> +};
>> +
>> +static const unsigned int ad7606c_18bit_differential_bipolar_scale_avail[4] = {
>> + 38147, 76294, 95367, 152588
>> +};
>>
>> static const unsigned int ad7606_16bit_sw_scale_avail[3] = {
>> 76293, 152588, 305176
>> @@ -62,7 +89,8 @@ int ad7606_reset(struct ad7606_state *st)
>> }
>> EXPORT_SYMBOL_NS_GPL(ad7606_reset, IIO_AD7606);
>>
>> -static int ad7606_16bit_chan_scale_setup(struct ad7606_state *st, int ch)
>> +static int ad7606_16bit_chan_scale_setup(struct ad7606_state *st,
>> + struct iio_chan_spec *chan, int ch)
>> {
>> struct ad7606_chan_scale *cs = &st->chan_scales[ch];
>>
>> @@ -83,6 +111,173 @@ static int ad7606_16bit_chan_scale_setup(struct ad7606_state *st, int ch)
>> return 0;
>> }
>>
>> +static int ad7606_get_chan_config(struct ad7606_state *st, int ch,
>> + bool *bipolar, bool *differential)
>> +{
>> + unsigned int num_channels = st->chip_info->num_channels - 1;
>> + struct device *dev = st->dev;
>> + int ret;
>> +
>> + *bipolar = false;
>> + *differential = false;
>> +
>> + device_for_each_child_node_scoped(dev, child) {
>> + u32 pins[2];
>> + int reg;
>> +
>> + ret = fwnode_property_read_u32(child, "reg", ®);
>> + if (ret)
>> + continue;
>> +
>> + /* channel number (here) is from 1 to num_channels */
>> + if (reg == 0 || reg > num_channels) {
>> + dev_warn(dev,
>> + "Invalid channel number (ignoring): %d\n", reg);
>> + continue;
>> + }
>> +
>> + if (reg != (ch + 1))
>> + continue;
>> +
>> + *bipolar = fwnode_property_read_bool(child, "bipolar");
>> +
>> + ret = fwnode_property_read_u32_array(child, "diff-channels",
>> + pins, ARRAY_SIZE(pins));
>> + /* Channel is differential, if pins are the same as 'reg' */
>> + if (ret == 0 && (pins[0] != reg || pins[1] != reg)) {
>> + dev_err(dev,
>> + "Differential pins must be the same as 'reg'");
>> + return -EINVAL;
>> + }
>> +
>> + *differential = (ret == 0);
>> +
>> + if (*differential && !*bipolar) {
>> + dev_err(dev,
>> + "'bipolar' must be added for diff channel %d\n",
>> + reg);
>> + return -EINVAL;
>> + }
>> +
>> + return 0;
>> + }
>> +
>> + return 0;
>> +}
>> +
>> +static int ad7606c_18bit_chan_scale_setup(struct ad7606_state *st,
>> + struct iio_chan_spec *chan, int ch)
>> +{
>> + struct ad7606_chan_scale *cs = &st->chan_scales[ch];
>> + bool bipolar, differential;
>> + int ret;
>> +
>> + if (!st->sw_mode_en) {
>> + cs->range = 0;
>> + cs->scale_avail = ad7606_18bit_hw_scale_avail;
>> + cs->num_scales = ARRAY_SIZE(ad7606_18bit_hw_scale_avail);
>> + return 0;
>> + }
>> +
>> + ret = ad7606_get_chan_config(st, ch, &bipolar, &differential);
>> + if (ret)
>> + return ret;
>> +
>> + if (differential) {
>> + cs->scale_avail = ad7606c_18bit_differential_bipolar_scale_avail;
>> + cs->num_scales =
>> + ARRAY_SIZE(ad7606c_18bit_differential_bipolar_scale_avail);
>> + /* Bipolar differential ranges start at 8 (b1000) */
>> + cs->reg_offset = 8;
>> + cs->range = 1;
>> + chan->differential = 1;
>> + chan->channel2 = chan->channel;
>> +
>> + return 0;
>> + }
>> +
>> + chan->differential = 0;
>> +
>> + if (bipolar) {
>> + cs->scale_avail = ad7606c_18bit_single_ended_bipolar_scale_avail;
>> + cs->num_scales =
>> + ARRAY_SIZE(ad7606c_18bit_single_ended_bipolar_scale_avail);
>> + /* Bipolar single-ended ranges start at 0 (b0000) */
>> + cs->reg_offset = 0;
>> + cs->range = 3;
>> + chan->scan_type.sign = 's';
>> +
>> + return 0;
>> + }
>> +
>> + cs->scale_avail = ad7606c_18bit_single_ended_unipolar_scale_avail;
>> + cs->num_scales =
>> + ARRAY_SIZE(ad7606c_18bit_single_ended_unipolar_scale_avail);
>> + /* Unipolar single-ended ranges start at 5 (b0101) */
>> + cs->reg_offset = 5;
>> + cs->range = 1;
>> + chan->scan_type.sign = 'u';
>> +
>> + return 0;
>> +}
>> +
>> +static int ad7606c_16bit_chan_scale_setup(struct ad7606_state *st,
>> + struct iio_chan_spec *chan, int ch)
>> +{
>> + struct ad7606_chan_scale *cs = &st->chan_scales[ch];
>> + bool bipolar, differential;
>> + int ret;
>> +
>> + if (!st->sw_mode_en) {
>> + cs->range = 0;
>> + cs->scale_avail = ad7606_16bit_hw_scale_avail;
>> + cs->num_scales = ARRAY_SIZE(ad7606_16bit_hw_scale_avail);
>> + return 0;
>> + }
>> +
>> + ret = ad7606_get_chan_config(st, ch, &bipolar, &differential);
>> + if (ret)
>> + return ret;
>> +
>> + if (differential) {
>> + cs->scale_avail = ad7606c_16bit_differential_bipolar_scale_avail;
>> + cs->num_scales =
>> + ARRAY_SIZE(ad7606c_16bit_differential_bipolar_scale_avail);
>> + /* Bipolar differential ranges start at 8 (b1000) */
>> + cs->reg_offset = 8;
>> + cs->range = 1;
>> + chan->differential = 1;
>> + chan->channel2 = chan->channel;
>> + chan->scan_type.sign = 's';
>> +
>> + return 0;
>> + }
>> +
>> + chan->differential = 0;
>> +
>> + if (bipolar) {
>> + cs->scale_avail = ad7606c_16bit_single_ended_bipolar_scale_avail;
>> + cs->num_scales =
>> + ARRAY_SIZE(ad7606c_16bit_single_ended_bipolar_scale_avail);
>> + /* Bipolar single-ended ranges start at 0 (b0000) */
>> + cs->reg_offset = 0;
>> + cs->range = 3;
>> + chan->scan_type.sign = 's';
>> +
>> + return 0;
>> + }
>> +
>> + cs->scale_avail = ad7606c_16bit_single_ended_unipolar_scale_avail;
>> + cs->num_scales =
>> + ARRAY_SIZE(ad7606c_16bit_single_ended_unipolar_scale_avail);
>> + /* Unipolar single-ended ranges start at 5 (b0101) */
>> + cs->reg_offset = 5;
>> + cs->range = 1;
>> + chan->scan_type.sign = 'u';
>> +
>> + return 0;
>> +}
>> +
>> static int ad7606_reg_access(struct iio_dev *indio_dev,
>> unsigned int reg,
>> unsigned int writeval,
>> @@ -107,9 +302,8 @@ static int ad7606_reg_access(struct iio_dev *indio_dev,
>> static int ad7606_read_samples(struct ad7606_state *st)
>> {
>> unsigned int num = st->chip_info->num_channels - 1;
>> - u16 *data = st->data;
>>
>> - return st->bops->read_block(st->dev, num, data);
>> + return st->bops->read_block(st->dev, num, &st->data);
>> }
>>
>> static irqreturn_t ad7606_trigger_handler(int irq, void *p)
>> @@ -125,7 +319,7 @@ static irqreturn_t ad7606_trigger_handler(int irq, void *p)
>> if (ret)
>> goto error_ret;
>>
>> - iio_push_to_buffers_with_timestamp(indio_dev, st->data,
>> + iio_push_to_buffers_with_timestamp(indio_dev, &st->data,
>> iio_get_time_ns(indio_dev));
>> error_ret:
>> iio_trigger_notify_done(indio_dev->trig);
>> @@ -139,6 +333,8 @@ static int ad7606_scan_direct(struct iio_dev *indio_dev, unsigned int ch,
>> int *val)
>> {
>> struct ad7606_state *st = iio_priv(indio_dev);
>> + unsigned int storagebits = st->chip_info->channels[1].scan_type.storagebits;
>> + const struct iio_chan_spec *chan;
>> int ret;
>>
>> gpiod_set_value(st->gpio_convst, 1);
>> @@ -153,7 +349,19 @@ static int ad7606_scan_direct(struct iio_dev *indio_dev, unsigned int ch,
>> if (ret)
>> goto error_ret;
>>
>> - *val = sign_extend32(st->data[ch], 15);
>> + chan = &indio_dev->channels[ch + 1];
>> + if (chan->scan_type.sign == 'u') {
>> + if (storagebits > 16)
>> + *val = st->data.buf32[ch];
>> + else
>> + *val = st->data.buf16[ch];
>> + return 0;
> Arrggh...
> I messed up here.
> Guillaume found a bug here, where this should be "goto error_ret" or
> do an "if () {} else {}"
> How should we do it here?
>
> Do we send a fix-patch or send a new series?
I can also send a fix in my next version of the "Add iio backend
support" series which depends on this one.
>
>
>> + }
>> +
>> + if (storagebits > 16)
>> + *val = sign_extend32(st->data.buf32[ch], 17);
>> + else
>> + *val = sign_extend32(st->data.buf16[ch], 15);
>>
>> error_ret:
>> gpiod_set_value(st->gpio_convst, 0);
>> @@ -266,7 +474,7 @@ static int ad7606_write_raw(struct iio_dev *indio_dev,
>> ch = chan->address;
>> cs = &st->chan_scales[ch];
>> i = find_closest(val2, cs->scale_avail, cs->num_scales);
>> - ret = st->write_scale(indio_dev, ch, i);
>> + ret = st->write_scale(indio_dev, ch, i + cs->reg_offset);
>> if (ret < 0)
>> return ret;
>> cs->range = i;
>> @@ -349,6 +557,18 @@ static const struct iio_chan_spec ad7606_channels_16bit[] = {
>> AD7606_CHANNEL(7, 16),
>> };
>>
>> +static const struct iio_chan_spec ad7606_channels_18bit[] = {
>> + IIO_CHAN_SOFT_TIMESTAMP(8),
>> + AD7606_CHANNEL(0, 18),
>> + AD7606_CHANNEL(1, 18),
>> + AD7606_CHANNEL(2, 18),
>> + AD7606_CHANNEL(3, 18),
>> + AD7606_CHANNEL(4, 18),
>> + AD7606_CHANNEL(5, 18),
>> + AD7606_CHANNEL(6, 18),
>> + AD7606_CHANNEL(7, 18),
>> +};
>> +
>> /*
>> * The current assumption that this driver makes for AD7616, is that it's
>> * working in Hardware Mode with Serial, Burst and Sequencer modes activated.
>> @@ -414,6 +634,20 @@ static const struct ad7606_chip_info ad7606_chip_info_tbl[] = {
>> .oversampling_avail = ad7606_oversampling_avail,
>> .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
>> },
>> + [ID_AD7606C_16] = {
>> + .channels = ad7606_channels_16bit,
>> + .num_channels = 9,
>> + .scale_setup_cb = ad7606c_16bit_chan_scale_setup,
>> + .oversampling_avail = ad7606_oversampling_avail,
>> + .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
>> + },
>> + [ID_AD7606C_18] = {
>> + .channels = ad7606_channels_18bit,
>> + .num_channels = 9,
>> + .scale_setup_cb = ad7606c_18bit_chan_scale_setup,
>> + .oversampling_avail = ad7606_oversampling_avail,
>> + .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail),
>> + },
>> [ID_AD7616] = {
>> .channels = ad7616_channels,
>> .num_channels = 17,
>> @@ -586,7 +820,7 @@ static const struct iio_trigger_ops ad7606_trigger_ops = {
>> .validate_device = iio_trigger_validate_own_device,
>> };
>>
>> -static int ad7606_sw_mode_setup(struct iio_dev *indio_dev)
>> +static int ad7606_sw_mode_setup(struct iio_dev *indio_dev, unsigned int id)
>> {
>> struct ad7606_state *st = iio_priv(indio_dev);
>>
>> @@ -604,13 +838,24 @@ static int ad7606_chan_scales_setup(struct iio_dev *indio_dev)
>> {
>> unsigned int num_channels = indio_dev->num_channels - 1;
>> struct ad7606_state *st = iio_priv(indio_dev);
>> + struct iio_chan_spec *chans;
>> + size_t size;
>> int ch, ret;
>>
>> + /* Clone IIO channels, since some may be differential */
>> + size = indio_dev->num_channels * sizeof(*indio_dev->channels);
>> + chans = devm_kzalloc(st->dev, size, GFP_KERNEL);
>> + if (!chans)
>> + return -ENOMEM;
>> +
>> + memcpy(chans, indio_dev->channels, size);
>> + indio_dev->channels = chans;
>> +
>> for (ch = 0; ch < num_channels; ch++) {
>> struct ad7606_chan_scale *cs;
>> int i;
>>
>> - ret = st->chip_info->scale_setup_cb(st, ch);
>> + ret = st->chip_info->scale_setup_cb(st, &chans[ch + 1], ch);
>> if (ret)
>> return ret;
>>
>> @@ -698,7 +943,7 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
>> st->write_scale = ad7606_write_scale_hw;
>> st->write_os = ad7606_write_os_hw;
>>
>> - ret = ad7606_sw_mode_setup(indio_dev);
>> + ret = ad7606_sw_mode_setup(indio_dev, id);
>> if (ret)
>> return ret;
>>
>> diff --git a/drivers/iio/adc/ad7606.h b/drivers/iio/adc/ad7606.h
>> index 25e84efd15c3..14ee75aa225b 100644
>> --- a/drivers/iio/adc/ad7606.h
>> +++ b/drivers/iio/adc/ad7606.h
>> @@ -63,7 +63,8 @@
>>
>> struct ad7606_state;
>>
>> -typedef int (*ad7606_scale_setup_cb_t)(struct ad7606_state *st, int ch);
>> +typedef int (*ad7606_scale_setup_cb_t)(struct ad7606_state *st,
>> + struct iio_chan_spec *chan, int ch);
>>
>> /**
>> * struct ad7606_chip_info - chip specific information
>> @@ -94,6 +95,8 @@ struct ad7606_chip_info {
>> * such that it can be read via the 'read_avail' hook
>> * @num_scales number of elements stored in the scale_avail array
>> * @range voltage range selection, selects which scale to apply
>> + * @reg_offset offset for the register value, to be applied when
>> + * writing the value of 'range' to the register value
>> */
>> struct ad7606_chan_scale {
>> #define AD760X_MAX_SCALES 16
>> @@ -102,6 +105,7 @@ struct ad7606_chan_scale {
>> int scale_avail_show[AD760X_MAX_SCALE_SHOW];
>> unsigned int num_scales;
>> unsigned int range;
>> + unsigned int reg_offset;
>> };
>>
>> /**
>> @@ -158,9 +162,13 @@ struct ad7606_state {
>> /*
>> * DMA (thus cache coherency maintenance) may require the
>> * transfer buffers to live in their own cache lines.
>> - * 16 * 16-bit samples + 64-bit timestamp
>> + * 16 * 16-bit samples + 64-bit timestamp - for AD7616
>> + * 8 * 32-bit samples + 64-bit timestamp - for AD7616C-18 (and similar)
>> */
>> - unsigned short data[20] __aligned(IIO_DMA_MINALIGN);
>> + union {
>> + u16 buf16[20];
>> + u32 buf32[10];
>> + } data __aligned(IIO_DMA_MINALIGN);
>> __be16 d16[2];
>> };
>>
>> @@ -201,6 +209,8 @@ enum ad7606_supported_device_ids {
>> ID_AD7606_6,
>> ID_AD7606_4,
>> ID_AD7606B,
>> + ID_AD7606C_16,
>> + ID_AD7606C_18,
>> ID_AD7616,
>> };
>>
>> diff --git a/drivers/iio/adc/ad7606_spi.c b/drivers/iio/adc/ad7606_spi.c
>> index e00f58a6a0e9..143440e73aab 100644
>> --- a/drivers/iio/adc/ad7606_spi.c
>> +++ b/drivers/iio/adc/ad7606_spi.c
>> @@ -77,6 +77,18 @@ static const struct iio_chan_spec ad7606b_sw_channels[] = {
>> AD7606_SW_CHANNEL(7, 16),
>> };
>>
>> +static const struct iio_chan_spec ad7606c_18_sw_channels[] = {
>> + IIO_CHAN_SOFT_TIMESTAMP(8),
>> + AD7606_SW_CHANNEL(0, 18),
>> + AD7606_SW_CHANNEL(1, 18),
>> + AD7606_SW_CHANNEL(2, 18),
>> + AD7606_SW_CHANNEL(3, 18),
>> + AD7606_SW_CHANNEL(4, 18),
>> + AD7606_SW_CHANNEL(5, 18),
>> + AD7606_SW_CHANNEL(6, 18),
>> + AD7606_SW_CHANNEL(7, 18),
>> +};
>> +
>> static const unsigned int ad7606B_oversampling_avail[9] = {
>> 1, 2, 4, 8, 16, 32, 64, 128, 256
>> };
>> @@ -120,6 +132,19 @@ static int ad7606_spi_read_block(struct device *dev,
>> return 0;
>> }
>>
>> +static int ad7606_spi_read_block18to32(struct device *dev,
>> + int count, void *buf)
>> +{
>> + struct spi_device *spi = to_spi_device(dev);
>> + struct spi_transfer xfer = {
>> + .bits_per_word = 18,
>> + .len = count * sizeof(u32),
>> + .rx_buf = buf,
>> + };
>> +
>> + return spi_sync_transfer(spi, &xfer, 1);
>> +}
>> +
>> static int ad7606_spi_reg_read(struct ad7606_state *st, unsigned int addr)
>> {
>> struct spi_device *spi = to_spi_device(st->dev);
>> @@ -283,6 +308,19 @@ static int ad7606B_sw_mode_config(struct iio_dev *indio_dev)
>> return 0;
>> }
>>
>> +static int ad7606c_18_sw_mode_config(struct iio_dev *indio_dev)
>> +{
>> + int ret;
>> +
>> + ret = ad7606B_sw_mode_config(indio_dev);
>> + if (ret)
>> + return ret;
>> +
>> + indio_dev->channels = ad7606c_18_sw_channels;
>> +
>> + return 0;
>> +}
>> +
>> static const struct ad7606_bus_ops ad7606_spi_bops = {
>> .read_block = ad7606_spi_read_block,
>> };
>> @@ -305,6 +343,15 @@ static const struct ad7606_bus_ops ad7606B_spi_bops = {
>> .sw_mode_config = ad7606B_sw_mode_config,
>> };
>>
>> +static const struct ad7606_bus_ops ad7606c_18_spi_bops = {
>> + .read_block = ad7606_spi_read_block18to32,
>> + .reg_read = ad7606_spi_reg_read,
>> + .reg_write = ad7606_spi_reg_write,
>> + .write_mask = ad7606_spi_write_mask,
>> + .rd_wr_cmd = ad7606B_spi_rd_wr_cmd,
>> + .sw_mode_config = ad7606c_18_sw_mode_config,
>> +};
>> +
>> static int ad7606_spi_probe(struct spi_device *spi)
>> {
>> const struct spi_device_id *id = spi_get_device_id(spi);
>> @@ -315,8 +362,12 @@ static int ad7606_spi_probe(struct spi_device *spi)
>> bops = &ad7616_spi_bops;
>> break;
>> case ID_AD7606B:
>> + case ID_AD7606C_16:
>> bops = &ad7606B_spi_bops;
>> break;
>> + case ID_AD7606C_18:
>> + bops = &ad7606c_18_spi_bops;
>> + break;
>> default:
>> bops = &ad7606_spi_bops;
>> break;
>> @@ -333,6 +384,8 @@ static const struct spi_device_id ad7606_id_table[] = {
>> { "ad7606-6", ID_AD7606_6 },
>> { "ad7606-8", ID_AD7606_8 },
>> { "ad7606b", ID_AD7606B },
>> + { "ad7606c-16", ID_AD7606C_16 },
>> + { "ad7606c-18", ID_AD7606C_18 },
>> { "ad7616", ID_AD7616 },
>> { }
>> };
>> @@ -344,6 +397,8 @@ static const struct of_device_id ad7606_of_match[] = {
>> { .compatible = "adi,ad7606-6" },
>> { .compatible = "adi,ad7606-8" },
>> { .compatible = "adi,ad7606b" },
>> + { .compatible = "adi,ad7606c-16" },
>> + { .compatible = "adi,ad7606c-18" },
>> { .compatible = "adi,ad7616" },
>> { }
>> };
>> --
>> 2.46.0
>>
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