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SubjectRE: [PATCH v9 1/2] iio: frequency: adrf6780: add support for ADRF6780
Date
Great! Thanks a lot!

--
Antoniu Miclăuş

> -----Original Message-----
> From: Jonathan Cameron <jic23@kernel.org>
> Sent: Thursday, October 21, 2021 11:03 PM
> To: Miclaus, Antoniu <Antoniu.Miclaus@analog.com>
> Cc: linux-kernel@vger.kernel.org; linux-iio@vger.kernel.org
> Subject: Re: [PATCH v9 1/2] iio: frequency: adrf6780: add support for
> ADRF6780
>
> [External]
>
> On Thu, 21 Oct 2021 14:32:43 +0300
> Antoniu Miclaus <antoniu.miclaus@analog.com> wrote:
>
> > The ADRF6780 is a silicon germanium (SiGe) design, wideband,
> > microwave upconverter optimized for point to point microwave
> > radio designs operating in the 5.9 GHz to 23.6 GHz frequency
> > range.
> >
> > Datasheet:
> > https://www.analog.com/media/en/technical-documentation/data-
> sheets/ADRF6780.pdf
> >
> > Signed-off-by: Antoniu Miclaus <antoniu.miclaus@analog.com>
> Cutting it fine but hopefully we can sneak this one in before
> the merge window as I'm about to push out for a final inclusion
> in linux-next before sending a pull request.
>
> Applied to the togreg branch of iio.git - I tweaked the line breaks
> a little, choosing to relax the align with opening brackets in favour
> of having sub 100 char lines,
>
> Thanks,
>
> Jonathan
>
> > ---
> > changes in v9:
> > - add locked and unlocked versions for spi operations and use them
> > accordingly
> > - rename `dev` -> `st`
> > - rename `struct adrf6780_dev` -> `struct adrf6780_state`
> > drivers/iio/frequency/Kconfig | 12 +
> > drivers/iio/frequency/Makefile | 1 +
> > drivers/iio/frequency/adrf6780.c | 521
> +++++++++++++++++++++++++++++++
> > 3 files changed, 534 insertions(+)
> > create mode 100644 drivers/iio/frequency/adrf6780.c
> >
> > diff --git a/drivers/iio/frequency/Kconfig b/drivers/iio/frequency/Kconfig
> > index 240b81502512..2c9e0559e8a4 100644
> > --- a/drivers/iio/frequency/Kconfig
> > +++ b/drivers/iio/frequency/Kconfig
> > @@ -49,5 +49,17 @@ config ADF4371
> >
> > To compile this driver as a module, choose M here: the
> > module will be called adf4371.
> > +
> > +config ADRF6780
> > + tristate "Analog Devices ADRF6780 Microwave Upconverter"
> > + depends on SPI
> > + depends on COMMON_CLK
> > + help
> > + Say yes here to build support for Analog Devices ADRF6780
> > + 5.9 GHz to 23.6 GHz, Wideband, Microwave Upconverter.
> > +
> > + To compile this driver as a module, choose M here: the
> > + module will be called adrf6780.
> > +
> > endmenu
> > endmenu
> > diff --git a/drivers/iio/frequency/Makefile
> b/drivers/iio/frequency/Makefile
> > index 518b1e50caef..ae3136c79202 100644
> > --- a/drivers/iio/frequency/Makefile
> > +++ b/drivers/iio/frequency/Makefile
> > @@ -7,3 +7,4 @@
> > obj-$(CONFIG_AD9523) += ad9523.o
> > obj-$(CONFIG_ADF4350) += adf4350.o
> > obj-$(CONFIG_ADF4371) += adf4371.o
> > +obj-$(CONFIG_ADRF6780) += adrf6780.o
> > diff --git a/drivers/iio/frequency/adrf6780.c
> b/drivers/iio/frequency/adrf6780.c
> > new file mode 100644
> > index 000000000000..b3fb0521196b
> > --- /dev/null
> > +++ b/drivers/iio/frequency/adrf6780.c
> > @@ -0,0 +1,521 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * ADRF6780 driver
> > + *
> > + * Copyright 2021 Analog Devices Inc.
> > + */
> > +
> > +#include <linux/bitfield.h>
> > +#include <linux/bits.h>
> > +#include <linux/clk.h>
> > +#include <linux/clkdev.h>
> > +#include <linux/clk-provider.h>
> > +#include <linux/delay.h>
> > +#include <linux/device.h>
> > +#include <linux/iio/iio.h>
> > +#include <linux/module.h>
> > +#include <linux/mod_devicetable.h>
> > +#include <linux/spi/spi.h>
> > +
> > +#include <asm/unaligned.h>
> > +
> > +/* ADRF6780 Register Map */
> > +#define ADRF6780_REG_CONTROL 0x00
> > +#define ADRF6780_REG_ALARM_READBACK 0x01
> > +#define ADRF6780_REG_ALARM_MASKS 0x02
> > +#define ADRF6780_REG_ENABLE 0x03
> > +#define ADRF6780_REG_LINEARIZE 0x04
> > +#define ADRF6780_REG_LO_PATH 0x05
> > +#define ADRF6780_REG_ADC_CONTROL 0x06
> > +#define ADRF6780_REG_ADC_OUTPUT 0x0C
> > +
> > +/* ADRF6780_REG_CONTROL Map */
> > +#define ADRF6780_PARITY_EN_MSK BIT(15)
> > +#define ADRF6780_SOFT_RESET_MSK BIT(14)
> > +#define ADRF6780_CHIP_ID_MSK GENMASK(11, 4)
> > +#define ADRF6780_CHIP_ID 0xA
> > +#define ADRF6780_CHIP_REVISION_MSK GENMASK(3, 0)
> > +
> > +/* ADRF6780_REG_ALARM_READBACK Map */
> > +#define ADRF6780_PARITY_ERROR_MSK BIT(15)
> > +#define ADRF6780_TOO_FEW_ERRORS_MSK BIT(14)
> > +#define ADRF6780_TOO_MANY_ERRORS_MSK BIT(13)
> > +#define ADRF6780_ADDRESS_RANGE_ERROR_MSK BIT(12)
> > +
> > +/* ADRF6780_REG_ENABLE Map */
> > +#define ADRF6780_VGA_BUFFER_EN_MSK BIT(8)
> > +#define ADRF6780_DETECTOR_EN_MSK BIT(7)
> > +#define ADRF6780_LO_BUFFER_EN_MSK BIT(6)
> > +#define ADRF6780_IF_MODE_EN_MSK BIT(5)
> > +#define ADRF6780_IQ_MODE_EN_MSK BIT(4)
> > +#define ADRF6780_LO_X2_EN_MSK BIT(3)
> > +#define ADRF6780_LO_PPF_EN_MSK BIT(2)
> > +#define ADRF6780_LO_EN_MSK BIT(1)
> > +#define ADRF6780_UC_BIAS_EN_MSK BIT(0)
> > +
> > +/* ADRF6780_REG_LINEARIZE Map */
> > +#define ADRF6780_RDAC_LINEARIZE_MSK GENMASK(7, 0)
> > +
> > +/* ADRF6780_REG_LO_PATH Map */
> > +#define ADRF6780_LO_SIDEBAND_MSK BIT(10)
> > +#define ADRF6780_Q_PATH_PHASE_ACCURACY_MSK GENMASK(7,
> 4)
> > +#define ADRF6780_I_PATH_PHASE_ACCURACY_MSK GENMASK(3,
> 0)
> > +
> > +/* ADRF6780_REG_ADC_CONTROL Map */
> > +#define ADRF6780_VDET_OUTPUT_SELECT_MSK BIT(3)
> > +#define ADRF6780_ADC_START_MSK BIT(2)
> > +#define ADRF6780_ADC_EN_MSK BIT(1)
> > +#define ADRF6780_ADC_CLOCK_EN_MSK BIT(0)
> > +
> > +/* ADRF6780_REG_ADC_OUTPUT Map */
> > +#define ADRF6780_ADC_STATUS_MSK BIT(8)
> > +#define ADRF6780_ADC_VALUE_MSK GENMASK(7,
> 0)
> > +
> > +struct adrf6780_state {
> > + struct spi_device *spi;
> > + struct clk *clkin;
> > + /* Protect against concurrent accesses to the device */
> > + struct mutex lock;
> > + bool vga_buff_en;
> > + bool lo_buff_en;
> > + bool if_mode_en;
> > + bool iq_mode_en;
> > + bool lo_x2_en;
> > + bool lo_ppf_en;
> > + bool lo_en;
> > + bool uc_bias_en;
> > + bool lo_sideband;
> > + bool vdet_out_en;
> > + u8 data[3] ____cacheline_aligned;
> > +};
> > +
> > +static int __adrf6780_spi_read(struct adrf6780_state *st, unsigned int reg,
> > + unsigned int *val)
> > +{
> > + int ret;
> > + struct spi_transfer t = {0};
> > +
> > + st->data[0] = 0x80 | (reg << 1);
> > + st->data[1] = 0x0;
> > + st->data[2] = 0x0;
> > +
> > + t.rx_buf = &st->data[0];
> > + t.tx_buf = &st->data[0];
> > + t.len = 3;
> > +
> > + ret = spi_sync_transfer(st->spi, &t, 1);
> > + if (ret)
> > + return ret;
> > +
> > + *val = (get_unaligned_be24(&st->data[0]) >> 1) & GENMASK(15, 0);
> > +
> > + return ret;
> > +}
> > +
> > +static int adrf6780_spi_read(struct adrf6780_state *st, unsigned int reg,
> > + unsigned int *val)
> > +{
> > + int ret;
> > +
> > + mutex_lock(&st->lock);
> > + ret = adrf6780_spi_read(st, reg, val);
> > + mutex_unlock(&st->lock);
> > +
> > + return ret;
> > +}
> > +
> > +static int __adrf6780_spi_write(struct adrf6780_state *st,
> > + unsigned int reg,
> > + unsigned int val)
> > +{
> > + put_unaligned_be24((val << 1) | (reg << 17), &st->data[0]);
> > +
> > + return spi_write(st->spi, &st->data[0], 3);
> > +}
> > +
> > +static int adrf6780_spi_write(struct adrf6780_state *st, unsigned int reg,
> > + unsigned int val)
> > +{
> > + int ret;
> > +
> > + mutex_lock(&st->lock);
> > + ret = adrf6780_spi_write(st, reg, val);
> > + mutex_unlock(&st->lock);
> > +
> > + return ret;
> > +}
> > +
> > +static int __adrf6780_spi_update_bits(struct adrf6780_state *st, unsigned
> int reg,
> > + unsigned int mask, unsigned int val)
> > +{
> > + int ret;
> > + unsigned int data, temp;
> > +
> > + ret = __adrf6780_spi_read(st, reg, &data);
> > + if (ret)
> > + return ret;
> > +
> > + temp = (data & ~mask) | (val & mask);
> > +
> > + return __adrf6780_spi_write(st, reg, temp);
> > +}
> > +
> > +static int adrf6780_spi_update_bits(struct adrf6780_state *st, unsigned
> int reg,
> > + unsigned int mask, unsigned int val)
> > +{
> > + int ret;
> > +
> > + mutex_lock(&st->lock);
> > + ret = __adrf6780_spi_update_bits(st, reg, mask, val);
> > + mutex_unlock(&st->lock);
> > +
> > + return ret;
> > +}
> > +
> > +static int adrf6780_read_adc_raw(struct adrf6780_state *st, unsigned int
> *read_val)
> > +{
> > + int ret;
> > +
> > + mutex_lock(&st->lock);
> > +
> > + ret = __adrf6780_spi_update_bits(st,
> ADRF6780_REG_ADC_CONTROL,
> > + ADRF6780_ADC_EN_MSK |
> > + ADRF6780_ADC_CLOCK_EN_MSK |
> > + ADRF6780_ADC_START_MSK,
> > +
> FIELD_PREP(ADRF6780_ADC_EN_MSK, 1) |
> > +
> FIELD_PREP(ADRF6780_ADC_CLOCK_EN_MSK, 1) |
> > +
> FIELD_PREP(ADRF6780_ADC_START_MSK, 1));
> > + if (ret)
> > + goto exit;
> > +
> > + /* Recommended delay for the ADC to be ready*/
> > + usleep_range(200, 250);
> > +
> > + ret = __adrf6780_spi_read(st, ADRF6780_REG_ADC_OUTPUT,
> read_val);
> > + if (ret)
> > + goto exit;
> > +
> > + if (!(*read_val & ADRF6780_ADC_STATUS_MSK)) {
> > + ret = -EINVAL;
> > + goto exit;
> > + }
> > +
> > + ret = __adrf6780_spi_update_bits(st,
> ADRF6780_REG_ADC_CONTROL,
> > + ADRF6780_ADC_START_MSK,
> > +
> FIELD_PREP(ADRF6780_ADC_START_MSK, 0));
> > + if (ret)
> > + goto exit;
> > +
> > + ret = __adrf6780_spi_read(st, ADRF6780_REG_ADC_OUTPUT,
> read_val);
> > +
> > +exit:
> > + mutex_unlock(&st->lock);
> > + return ret;
> > +}
> > +
> > +static int adrf6780_read_raw(struct iio_dev *indio_dev,
> > + struct iio_chan_spec const *chan,
> > + int *val, int *val2, long info)
> > +{
> > + struct adrf6780_state *dev = iio_priv(indio_dev);
> > + unsigned int data;
> > + int ret;
> > +
> > + switch (info) {
> > + case IIO_CHAN_INFO_RAW:
> > + ret = adrf6780_read_adc_raw(dev, &data);
> > + if (ret)
> > + return ret;
> > +
> > + *val = data & ADRF6780_ADC_VALUE_MSK;
> > +
> > + return IIO_VAL_INT;
> > +
> > + case IIO_CHAN_INFO_SCALE:
> > + ret = adrf6780_spi_read(dev, ADRF6780_REG_LINEARIZE,
> &data);
> > + if (ret)
> > + return ret;
> > +
> > + *val = data & ADRF6780_RDAC_LINEARIZE_MSK;
> > +
> > + return IIO_VAL_INT;
> > + case IIO_CHAN_INFO_PHASE:
> > + ret = adrf6780_spi_read(dev, ADRF6780_REG_LO_PATH,
> &data);
> > + if (ret)
> > + return ret;
> > +
> > + switch (chan->channel2) {
> > + case IIO_MOD_I:
> > + *val = data &
> ADRF6780_I_PATH_PHASE_ACCURACY_MSK;
> > +
> > + return IIO_VAL_INT;
> > + case IIO_MOD_Q:
> > + *val =
> FIELD_GET(ADRF6780_Q_PATH_PHASE_ACCURACY_MSK, data);
> > +
> > + return IIO_VAL_INT;
> > + default:
> > + return -EINVAL;
> > + }
> > + default:
> > + return -EINVAL;
> > + }
> > +}
> > +
> > +static int adrf6780_write_raw(struct iio_dev *indio_dev,
> > + struct iio_chan_spec const *chan,
> > + int val, int val2, long info)
> > +{
> > + struct adrf6780_state *st = iio_priv(indio_dev);
> > +
> > + switch (info) {
> > + case IIO_CHAN_INFO_SCALE:
> > + return adrf6780_spi_write(st, ADRF6780_REG_LINEARIZE,
> val);
> > + case IIO_CHAN_INFO_PHASE:
> > + switch (chan->channel2) {
> > + case IIO_MOD_I:
> > + return adrf6780_spi_update_bits(st,
> ADRF6780_REG_LO_PATH,
> > +
> ADRF6780_I_PATH_PHASE_ACCURACY_MSK,
> > +
> FIELD_PREP(ADRF6780_I_PATH_PHASE_ACCURACY_MSK, val));
> > + case IIO_MOD_Q:
> > + return adrf6780_spi_update_bits(st,
> ADRF6780_REG_LO_PATH,
> > +
> ADRF6780_Q_PATH_PHASE_ACCURACY_MSK,
> > +
> FIELD_PREP(ADRF6780_Q_PATH_PHASE_ACCURACY_MSK, val));
> > + default:
> > + return -EINVAL;
> > + }
> > + default:
> > + return -EINVAL;
> > + }
> > +}
> > +
> > +static int adrf6780_reg_access(struct iio_dev *indio_dev,
> > + unsigned int reg,
> > + unsigned int write_val,
> > + unsigned int *read_val)
> > +{
> > + struct adrf6780_state *st = iio_priv(indio_dev);
> > +
> > + if (read_val)
> > + return adrf6780_spi_read(st, reg, read_val);
> > + else
> > + return adrf6780_spi_write(st, reg, write_val);
> > +}
> > +
> > +static const struct iio_info adrf6780_info = {
> > + .read_raw = adrf6780_read_raw,
> > + .write_raw = adrf6780_write_raw,
> > + .debugfs_reg_access = &adrf6780_reg_access,
> > +};
> > +
> > +#define ADRF6780_CHAN_ADC(_channel) { \
> > + .type = IIO_ALTVOLTAGE, \
> > + .output = 0, \
> > + .indexed = 1, \
> > + .channel = _channel, \
> > + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) \
> > +}
> > +
> > +#define ADRF6780_CHAN_RDAC(_channel) { \
> > + .type = IIO_ALTVOLTAGE, \
> > + .output = 1, \
> > + .indexed = 1, \
> > + .channel = _channel, \
> > + .info_mask_separate = BIT(IIO_CHAN_INFO_SCALE) \
> > +}
> > +
> > +#define ADRF6780_CHAN_IQ_PHASE(_channel, rf_comp) { \
> > + .type = IIO_ALTVOLTAGE, \
> > + .modified = 1, \
> > + .output = 1, \
> > + .indexed = 1, \
> > + .channel2 = IIO_MOD_##rf_comp, \
> > + .channel = _channel, \
> > + .info_mask_separate = BIT(IIO_CHAN_INFO_PHASE) \
> > +}
> > +
> > +static const struct iio_chan_spec adrf6780_channels[] = {
> > + ADRF6780_CHAN_ADC(0),
> > + ADRF6780_CHAN_RDAC(0),
> > + ADRF6780_CHAN_IQ_PHASE(0, I),
> > + ADRF6780_CHAN_IQ_PHASE(0, Q),
> > +};
> > +
> > +static int adrf6780_reset(struct adrf6780_state *st)
> > +{
> > + int ret;
> > + struct spi_device *spi = st->spi;
> > +
> > + ret = __adrf6780_spi_update_bits(st, ADRF6780_REG_CONTROL,
> > + ADRF6780_SOFT_RESET_MSK,
> > +
> FIELD_PREP(ADRF6780_SOFT_RESET_MSK, 1));
> > + if (ret) {
> > + dev_err(&spi->dev, "ADRF6780 SPI software reset
> failed.\n");
> > + return ret;
> > + }
> > +
> > + ret = __adrf6780_spi_update_bits(st, ADRF6780_REG_CONTROL,
> > + ADRF6780_SOFT_RESET_MSK,
> > +
> FIELD_PREP(ADRF6780_SOFT_RESET_MSK, 0));
> > + if (ret) {
> > + dev_err(&spi->dev, "ADRF6780 SPI software reset disable
> failed.\n");
> > + return ret;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int adrf6780_init(struct adrf6780_state *st)
> > +{
> > + int ret;
> > + unsigned int chip_id, enable_reg, enable_reg_msk;
> > + struct spi_device *spi = st->spi;
> > +
> > + /* Perform a software reset */
> > + ret = adrf6780_reset(st);
> > + if (ret)
> > + return ret;
> > +
> > + ret = __adrf6780_spi_read(st, ADRF6780_REG_CONTROL, &chip_id);
> > + if (ret)
> > + return ret;
> > +
> > + chip_id = FIELD_GET(ADRF6780_CHIP_ID_MSK, chip_id);
> > + if (chip_id != ADRF6780_CHIP_ID) {
> > + dev_err(&spi->dev, "ADRF6780 Invalid Chip ID.\n");
> > + return -EINVAL;
> > + }
> > +
> > + enable_reg_msk = ADRF6780_VGA_BUFFER_EN_MSK |
> > + ADRF6780_DETECTOR_EN_MSK |
> > + ADRF6780_LO_BUFFER_EN_MSK |
> > + ADRF6780_IF_MODE_EN_MSK |
> > + ADRF6780_IQ_MODE_EN_MSK |
> > + ADRF6780_LO_X2_EN_MSK |
> > + ADRF6780_LO_PPF_EN_MSK |
> > + ADRF6780_LO_EN_MSK |
> > + ADRF6780_UC_BIAS_EN_MSK;
> > +
> > + enable_reg = FIELD_PREP(ADRF6780_VGA_BUFFER_EN_MSK, st-
> >vga_buff_en) |
> > + FIELD_PREP(ADRF6780_DETECTOR_EN_MSK, 1) |
> > + FIELD_PREP(ADRF6780_LO_BUFFER_EN_MSK, st-
> >lo_buff_en) |
> > + FIELD_PREP(ADRF6780_IF_MODE_EN_MSK, st-
> >if_mode_en) |
> > + FIELD_PREP(ADRF6780_IQ_MODE_EN_MSK, st-
> >iq_mode_en) |
> > + FIELD_PREP(ADRF6780_LO_X2_EN_MSK, st-
> >lo_x2_en) |
> > + FIELD_PREP(ADRF6780_LO_PPF_EN_MSK, st-
> >lo_ppf_en) |
> > + FIELD_PREP(ADRF6780_LO_EN_MSK, st->lo_en) |
> > + FIELD_PREP(ADRF6780_UC_BIAS_EN_MSK, st-
> >uc_bias_en);
> > +
> > + ret = __adrf6780_spi_update_bits(st, ADRF6780_REG_ENABLE,
> enable_reg_msk, enable_reg);
> > + if (ret)
> > + return ret;
> > +
> > + ret = __adrf6780_spi_update_bits(st, ADRF6780_REG_LO_PATH,
> > + ADRF6780_LO_SIDEBAND_MSK,
> > +
> FIELD_PREP(ADRF6780_LO_SIDEBAND_MSK, st->lo_sideband));
> > + if (ret)
> > + return ret;
> > +
> > + return __adrf6780_spi_update_bits(st,
> ADRF6780_REG_ADC_CONTROL,
> > +
> ADRF6780_VDET_OUTPUT_SELECT_MSK,
> > +
> FIELD_PREP(ADRF6780_VDET_OUTPUT_SELECT_MSK, st->vdet_out_en));
> > +}
> > +
> > +static void adrf6780_properties_parse(struct adrf6780_state *st)
> > +{
> > + struct spi_device *spi = st->spi;
> > +
> > + st->vga_buff_en = device_property_read_bool(&spi->dev, "adi,vga-
> buff-en");
> > + st->lo_buff_en = device_property_read_bool(&spi->dev, "adi,lo-
> buff-en");
> > + st->if_mode_en = device_property_read_bool(&spi->dev, "adi,if-
> mode-en");
> > + st->iq_mode_en = device_property_read_bool(&spi->dev, "adi,iq-
> mode-en");
> > + st->lo_x2_en = device_property_read_bool(&spi->dev, "adi,lo-x2-
> en");
> > + st->lo_ppf_en = device_property_read_bool(&spi->dev, "adi,lo-ppf-
> en");
> > + st->lo_en = device_property_read_bool(&spi->dev, "adi,lo-en");
> > + st->uc_bias_en = device_property_read_bool(&spi->dev, "adi,uc-
> bias-en");
> > + st->lo_sideband = device_property_read_bool(&spi->dev, "adi,lo-
> sideband");
> > + st->vdet_out_en = device_property_read_bool(&spi->dev,
> "adi,vdet-out-en");
> > +}
> > +
> > +static void adrf6780_clk_disable(void *data)
> > +{
> > + clk_disable_unprepare(data);
> > +}
> > +
> > +static void adrf6780_powerdown(void *data)
> > +{
> > + /* Disable all components in the Enable Register */
> > + adrf6780_spi_write(data, ADRF6780_REG_ENABLE, 0x0);
> > +}
> > +
> > +static int adrf6780_probe(struct spi_device *spi)
> > +{
> > + struct iio_dev *indio_dev;
> > + struct adrf6780_state *st;
> > + int ret;
> > +
> > + indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
> > + if (!indio_dev)
> > + return -ENOMEM;
> > +
> > + st = iio_priv(indio_dev);
> > +
> > + indio_dev->info = &adrf6780_info;
> > + indio_dev->name = "adrf6780";
> > + indio_dev->channels = adrf6780_channels;
> > + indio_dev->num_channels = ARRAY_SIZE(adrf6780_channels);
> > +
> > + st->spi = spi;
> > +
> > + adrf6780_properties_parse(st);
> > +
> > + st->clkin = devm_clk_get(&spi->dev, "lo_in");
> > + if (IS_ERR(st->clkin))
> > + return dev_err_probe(&spi->dev, PTR_ERR(st->clkin),
> > + "failed to get the LO input clock\n");
> > +
> > + ret = clk_prepare_enable(st->clkin);
> > + if (ret)
> > + return ret;
> > +
> > + ret = devm_add_action_or_reset(&spi->dev, adrf6780_clk_disable,
> st->clkin);
> > + if (ret)
> > + return ret;
> > +
> > + mutex_init(&st->lock);
> > +
> > + ret = adrf6780_init(st);
> > + if (ret)
> > + return ret;
> > +
> > + ret = devm_add_action_or_reset(&spi->dev, adrf6780_powerdown,
> st);
> > + if (ret)
> > + return ret;
> > +
> > + return devm_iio_device_register(&spi->dev, indio_dev);
> > +}
> > +
> > +static const struct spi_device_id adrf6780_id[] = {
> > + { "adrf6780", 0 },
> > + {}
> > +};
> > +MODULE_DEVICE_TABLE(spi, adrf6780_id);
> > +
> > +static const struct of_device_id adrf6780_of_match[] = {
> > + { .compatible = "adi,adrf6780" },
> > + {}
> > +};
> > +MODULE_DEVICE_TABLE(of, adrf6780_of_match);
> > +
> > +static struct spi_driver adrf6780_driver = {
> > + .driver = {
> > + .name = "adrf6780",
> > + .of_match_table = adrf6780_of_match,
> > + },
> > + .probe = adrf6780_probe,
> > + .id_table = adrf6780_id,
> > +};
> > +module_spi_driver(adrf6780_driver);
> > +
> > +MODULE_AUTHOR("Antoniu Miclaus <antoniu.miclaus@analog.com");
> > +MODULE_DESCRIPTION("Analog Devices ADRF6780");
> > +MODULE_LICENSE("GPL v2");

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