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iio: frequency: adf4371: Add support for ADF4372 PLL

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The ADF4372 is part of the same family with ADF4371, the main difference
is that it has only 3 channels instead of 4, as the frequency quadrupler
is missing. As a result, the ADF4372 allows frequencies from 62.5 MHz to
16 GHz to be generated.

Datasheet:
Link: https://www.analog.com/media/en/technical-documentation/data-sheets/adf4372.pdf

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Stefan Popa
2019-06-24 18:12:12 +03:00
committed by Jonathan Cameron
parent c444e956a2
commit 13a0af411a
2 changed files with 31 additions and 6 deletions
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31
drivers/iio/frequency/adf4371.c
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@@ -87,6 +87,11 @@ enum {
ADF4371_CH_RF32
};
enum adf4371_variant {
ADF4371,
ADF4372
};
struct adf4371_pwrdown {
unsigned int reg;
unsigned int bit;
@@ -140,6 +145,11 @@ static const struct regmap_config adf4371_regmap_config = {
.read_flag_mask = BIT(7),
};
struct adf4371_chip_info {
unsigned int num_channels;
const struct iio_chan_spec *channels;
};
struct adf4371_state {
struct spi_device *spi;
struct regmap *regmap;
@@ -152,6 +162,7 @@ struct adf4371_state {
* writes.
*/
struct mutex lock;
const struct adf4371_chip_info *chip_info;
unsigned long clkin_freq;
unsigned long fpfd;
unsigned int integer;
@@ -429,6 +440,17 @@ static const struct iio_chan_spec adf4371_chan[] = {
ADF4371_CHANNEL(ADF4371_CH_RF32),
};
static const struct adf4371_chip_info adf4371_chip_info[] = {
[ADF4371] = {
.channels = adf4371_chan,
.num_channels = 4,
},
[ADF4372] = {
.channels = adf4371_chan,
.num_channels = 3,
}
};
static int adf4371_reg_access(struct iio_dev *indio_dev,
unsigned int reg,
unsigned int writeval,
@@ -537,12 +559,13 @@ static int adf4371_probe(struct spi_device *spi)
st->regmap = regmap;
mutex_init(&st->lock);
st->chip_info = &adf4371_chip_info[id->driver_data];
indio_dev->dev.parent = &spi->dev;
indio_dev->name = id->name;
indio_dev->info = &adf4371_info;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = adf4371_chan;
indio_dev->num_channels = ARRAY_SIZE(adf4371_chan);
indio_dev->channels = st->chip_info->channels;
indio_dev->num_channels = st->chip_info->num_channels;
st->clkin = devm_clk_get(&spi->dev, "clkin");
if (IS_ERR(st->clkin))
@@ -568,13 +591,15 @@ static int adf4371_probe(struct spi_device *spi)
}
static const struct spi_device_id adf4371_id_table[] = {
{ "adf4371", 0 },
{ "adf4371", ADF4371 },
{ "adf4372", ADF4372 },
{}
};
MODULE_DEVICE_TABLE(spi, adf4371_id_table);
static const struct of_device_id adf4371_of_match[] = {
{ .compatible = "adi,adf4371" },
{ .compatible = "adi,adf4372" },
{ },
};
MODULE_DEVICE_TABLE(of, adf4371_of_match);