Staging: IIO: DDS: AD9833 / AD9834 driver

Changes since RFC/v1:
IIO: Apply list review feedback

Apply list review feedback:
	Rename attributes to fit IIO convention used in other drivers.
	Fix typos.
	Provide ddsX_out_enable as opposed to ddsX_out_disable.
	Use proper __devexit marking.
	Use strict_strtoul() to avoid negatives.

Changes since v2:
IIO: ad9834.c: Apply more list review feedback

	Update use of dds convenience macros.
	Fix tabbing.
	Remove superfluous brackets.
	Keep output disabled after probe.
	Remove unnecessary code.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Reviewed-by: Datta Shubhrajyoti <shubhrajyoti@ti.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

4 files changed, 600 insertions, 0 deletions

diff --git a/drivers/staging/iio/dds/Kconfig b/drivers/staging/iio/dds/Kconfig
index 7969be29b0e..a047da62daf 100644
--- a/drivers/staging/iio/dds/Kconfig
+++ b/drivers/staging/iio/dds/Kconfig
@@ -17,6 +17,16 @@ config AD9832
           Say yes here to build support for Analog Devices DDS chip
           ad9832 and ad9835, provides direct access via sysfs.
 
+config AD9834
+        tristate "Analog Devices ad9833/4/ driver"
+        depends on SPI
+        help
+          Say yes here to build support for Analog Devices DDS chip
+          AD9833 and AD9834, provides direct access via sysfs.
+
+          To compile this driver as a module, choose M here: the
+          module will be called ad9834.
+
 config AD9850
         tristate "Analog Devices ad9850/1 driver"
         depends on SPI
diff --git a/drivers/staging/iio/dds/Makefile b/drivers/staging/iio/dds/Makefile
index 6f274acb0fc..147746176b9 100644
--- a/drivers/staging/iio/dds/Makefile
+++ b/drivers/staging/iio/dds/Makefile
@@ -4,6 +4,7 @@
 
 obj-$(CONFIG_AD5930) += ad5930.o
 obj-$(CONFIG_AD9832) += ad9832.o
+obj-$(CONFIG_AD9834) += ad9834.o
 obj-$(CONFIG_AD9850) += ad9850.o
 obj-$(CONFIG_AD9852) += ad9852.o
 obj-$(CONFIG_AD9910) += ad9910.o
diff --git a/drivers/staging/iio/dds/ad9834.c b/drivers/staging/iio/dds/ad9834.c
new file mode 100644
index 00000000000..eb1a681874f
--- /dev/null
+++ b/drivers/staging/iio/dds/ad9834.c
@@ -0,0 +1,477 @@
+/*
+ * AD9834 SPI DAC driver
+ *
+ * Copyright 2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+#include <linux/list.h>
+#include <linux/spi/spi.h>
+#include <linux/regulator/consumer.h>
+#include <linux/err.h>
+#include <asm/div64.h>
+
+#include "../iio.h"
+#include "../sysfs.h"
+#include "dds.h"
+
+#include "ad9834.h"
+
+static unsigned int ad9834_calc_freqreg(unsigned long mclk, unsigned long fout)
+{
+        unsigned long long freqreg = (u64) fout * (u64) (1 << AD9834_FREQ_BITS);
+        do_div(freqreg, mclk);
+        return freqreg;
+}
+
+static int ad9834_write_frequency(struct ad9834_state *st,
+                                  unsigned long addr, unsigned long fout)
+{
+        unsigned long regval;
+
+        if (fout > (st->mclk / 2))
+                return -EINVAL;
+
+        regval = ad9834_calc_freqreg(st->mclk, fout);
+
+        st->freq_data[0] = cpu_to_be16(addr | (regval &
+                                       RES_MASK(AD9834_FREQ_BITS / 2)));
+        st->freq_data[1] = cpu_to_be16(addr | ((regval >>
+                                       (AD9834_FREQ_BITS / 2)) &
+                                       RES_MASK(AD9834_FREQ_BITS / 2)));
+
+        return spi_sync(st->spi, &st->freq_msg);;
+}
+
+static int ad9834_write_phase(struct ad9834_state *st,
+                                  unsigned long addr, unsigned long phase)
+{
+        if (phase > (1 << AD9834_PHASE_BITS))
+                return -EINVAL;
+        st->data = cpu_to_be16(addr | phase);
+
+        return spi_sync(st->spi, &st->msg);
+}
+
+static ssize_t ad9834_write(struct device *dev,
+                struct device_attribute *attr,
+                const char *buf,
+                size_t len)
+{
+        struct iio_dev *dev_info = dev_get_drvdata(dev);
+        struct ad9834_state *st = dev_info->dev_data;
+        struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+        int ret;
+        long val;
+
+        ret = strict_strtoul(buf, 10, &val);
+        if (ret)
+                goto error_ret;
+
+        mutex_lock(&dev_info->mlock);
+        switch (this_attr->address) {
+        case AD9834_REG_FREQ0:
+        case AD9834_REG_FREQ1:
+                ret = ad9834_write_frequency(st, this_attr->address, val);
+                break;
+        case AD9834_REG_PHASE0:
+        case AD9834_REG_PHASE1:
+                ret = ad9834_write_phase(st, this_attr->address, val);
+                break;
+        case AD9834_OPBITEN:
+                if (st->control & AD9834_MODE) {
+                        ret = -EINVAL;  /* AD9843 reserved mode */
+                        break;
+                }
+
+                if (val)
+                        st->control |= AD9834_OPBITEN;
+                else
+                        st->control &= ~AD9834_OPBITEN;
+
+                st->data = cpu_to_be16(AD9834_REG_CMD | st->control);
+                ret = spi_sync(st->spi, &st->msg);
+                break;
+        case AD9834_PIN_SW:
+                if (val)
+                        st->control |= AD9834_PIN_SW;
+                else
+                        st->control &= ~AD9834_PIN_SW;
+                st->data = cpu_to_be16(AD9834_REG_CMD | st->control);
+                ret = spi_sync(st->spi, &st->msg);
+                break;
+        case AD9834_FSEL:
+        case AD9834_PSEL:
+                if (val == 0)
+                        st->control &= ~(this_attr->address | AD9834_PIN_SW);
+                else if (val == 1) {
+                        st->control |= this_attr->address;
+                        st->control &= ~AD9834_PIN_SW;
+                } else {
+                        ret = -EINVAL;
+                        break;
+                }
+                st->data = cpu_to_be16(AD9834_REG_CMD | st->control);
+                ret = spi_sync(st->spi, &st->msg);
+                break;
+        case AD9834_RESET:
+                if (val)
+                        st->control &= ~AD9834_RESET;
+                else
+                        st->control |= AD9834_RESET;
+
+                st->data = cpu_to_be16(AD9834_REG_CMD | st->control);
+                ret = spi_sync(st->spi, &st->msg);
+                break;
+        default:
+                ret = -ENODEV;
+        }
+        mutex_unlock(&dev_info->mlock);
+
+error_ret:
+        return ret ? ret : len;
+}
+
+static ssize_t ad9834_store_wavetype(struct device *dev,
+                                 struct device_attribute *attr,
+                                 const char *buf,
+                                 size_t len)
+{
+        struct iio_dev *dev_info = dev_get_drvdata(dev);
+        struct ad9834_state *st = dev_info->dev_data;
+        struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+        int ret = 0;
+        bool is_ad9833 = st->devid == ID_AD9833;
+
+        mutex_lock(&dev_info->mlock);
+
+        switch (this_attr->address) {
+        case 0:
+                if (sysfs_streq(buf, "sine")) {
+                        st->control &= ~AD9834_MODE;
+                        if (is_ad9833)
+                                st->control &= ~AD9834_OPBITEN;
+                } else if (sysfs_streq(buf, "triangle")) {
+                        if (is_ad9833) {
+                                st->control &= ~AD9834_OPBITEN;
+                                st->control |= AD9834_MODE;
+                        } else if (st->control & AD9834_OPBITEN) {
+                                ret = -EINVAL;  /* AD9843 reserved mode */
+                        } else {
+                                st->control |= AD9834_MODE;
+                        }
+                } else if (is_ad9833 && sysfs_streq(buf, "square")) {
+                        st->control &= ~AD9834_MODE;
+                        st->control |= AD9834_OPBITEN;
+                } else {
+                        ret = -EINVAL;
+                }
+
+                break;
+        case 1:
+                if (sysfs_streq(buf, "square") &&
+                        !(st->control & AD9834_MODE)) {
+                        st->control &= ~AD9834_MODE;
+                        st->control |= AD9834_OPBITEN;
+                } else {
+                        ret = -EINVAL;
+                }
+                break;
+        default:
+                ret = -EINVAL;
+                break;
+        }
+
+        if (!ret) {
+                st->data = cpu_to_be16(AD9834_REG_CMD | st->control);
+                ret = spi_sync(st->spi, &st->msg);
+        }
+        mutex_unlock(&dev_info->mlock);
+
+        return ret ? ret : len;
+}
+
+static ssize_t ad9834_show_name(struct device *dev,
+                                 struct device_attribute *attr,
+                                 char *buf)
+{
+        struct iio_dev *dev_info = dev_get_drvdata(dev);
+        struct ad9834_state *st = iio_dev_get_devdata(dev_info);
+
+        return sprintf(buf, "%s\n", spi_get_device_id(st->spi)->name);
+}
+static IIO_DEVICE_ATTR(name, S_IRUGO, ad9834_show_name, NULL, 0);
+
+static ssize_t ad9834_show_out0_wavetype_available(struct device *dev,
+                                                struct device_attribute *attr,
+                                                char *buf)
+{
+        struct iio_dev *dev_info = dev_get_drvdata(dev);
+        struct ad9834_state *st = iio_dev_get_devdata(dev_info);
+        char *str;
+
+        if (st->devid == ID_AD9833)
+                str = "sine triangle square";
+        else if (st->control & AD9834_OPBITEN)
+                str = "sine";
+        else
+                str = "sine triangle";
+
+        return sprintf(buf, "%s\n", str);
+}
+
+
+static IIO_DEVICE_ATTR(dds0_out0_wavetype_available, S_IRUGO,
+                       ad9834_show_out0_wavetype_available, NULL, 0);
+
+static ssize_t ad9834_show_out1_wavetype_available(struct device *dev,
+                                                struct device_attribute *attr,
+                                                char *buf)
+{
+        struct iio_dev *dev_info = dev_get_drvdata(dev);
+        struct ad9834_state *st = iio_dev_get_devdata(dev_info);
+        char *str;
+
+        if (st->control & AD9834_MODE)
+                str = "";
+        else
+                str = "square";
+
+        return sprintf(buf, "%s\n", str);
+}
+
+static IIO_DEVICE_ATTR(dds0_out1_wavetype_available, S_IRUGO,
+                       ad9834_show_out1_wavetype_available, NULL, 0);
+
+/**
+ * see dds.h for further information
+ */
+
+static IIO_DEV_ATTR_FREQ(0, 0, S_IWUSR, NULL, ad9834_write, AD9834_REG_FREQ0);
+static IIO_DEV_ATTR_FREQ(0, 1, S_IWUSR, NULL, ad9834_write, AD9834_REG_FREQ1);
+static IIO_DEV_ATTR_FREQSYMBOL(0, S_IWUSR, NULL, ad9834_write, AD9834_FSEL);
+static IIO_CONST_ATTR_FREQ_SCALE(0, "1"); /* 1Hz */
+
+static IIO_DEV_ATTR_PHASE(0, 0, S_IWUSR, NULL, ad9834_write, AD9834_REG_PHASE0);
+static IIO_DEV_ATTR_PHASE(0, 1, S_IWUSR, NULL, ad9834_write, AD9834_REG_PHASE1);
+static IIO_DEV_ATTR_PHASESYMBOL(0, S_IWUSR, NULL, ad9834_write, AD9834_PSEL);
+static IIO_CONST_ATTR_PHASE_SCALE(0, "0.0015339808"); /* 2PI/2^12 rad*/
+
+static IIO_DEV_ATTR_PINCONTROL_EN(0, S_IWUSR, NULL,
+        ad9834_write, AD9834_PIN_SW);
+static IIO_DEV_ATTR_OUT_ENABLE(0, S_IWUSR, NULL, ad9834_write, AD9834_RESET);
+static IIO_DEV_ATTR_OUTY_ENABLE(0, 1, S_IWUSR, NULL,
+        ad9834_write, AD9834_OPBITEN);
+static IIO_DEV_ATTR_OUT_WAVETYPE(0, 0, ad9834_store_wavetype, 0);
+static IIO_DEV_ATTR_OUT_WAVETYPE(0, 1, ad9834_store_wavetype, 1);
+
+static struct attribute *ad9834_attributes[] = {
+        &iio_dev_attr_dds0_freq0.dev_attr.attr,
+        &iio_dev_attr_dds0_freq1.dev_attr.attr,
+        &iio_const_attr_dds0_freq_scale.dev_attr.attr,
+        &iio_dev_attr_dds0_phase0.dev_attr.attr,
+        &iio_dev_attr_dds0_phase1.dev_attr.attr,
+        &iio_const_attr_dds0_phase_scale.dev_attr.attr,
+        &iio_dev_attr_dds0_pincontrol_en.dev_attr.attr,
+        &iio_dev_attr_dds0_freqsymbol.dev_attr.attr,
+        &iio_dev_attr_dds0_phasesymbol.dev_attr.attr,
+        &iio_dev_attr_dds0_out_enable.dev_attr.attr,
+        &iio_dev_attr_dds0_out1_enable.dev_attr.attr,
+        &iio_dev_attr_dds0_out0_wavetype.dev_attr.attr,
+        &iio_dev_attr_dds0_out1_wavetype.dev_attr.attr,
+        &iio_dev_attr_dds0_out0_wavetype_available.dev_attr.attr,
+        &iio_dev_attr_dds0_out1_wavetype_available.dev_attr.attr,
+        &iio_dev_attr_name.dev_attr.attr,
+        NULL,
+};
+
+static mode_t ad9834_attr_is_visible(struct kobject *kobj,
+                                     struct attribute *attr, int n)
+{
+        struct device *dev = container_of(kobj, struct device, kobj);
+        struct iio_dev *dev_info = dev_get_drvdata(dev);
+        struct ad9834_state *st = iio_dev_get_devdata(dev_info);
+
+        mode_t mode = attr->mode;
+
+        if (st->devid == ID_AD9834)
+                return mode;
+
+        if ((attr == &iio_dev_attr_dds0_out1_enable.dev_attr.attr) ||
+                (attr == &iio_dev_attr_dds0_out1_wavetype.dev_attr.attr) ||
+                (attr ==
+                &iio_dev_attr_dds0_out1_wavetype_available.dev_attr.attr))
+                mode = 0;
+
+        return mode;
+}
+
+static const struct attribute_group ad9834_attribute_group = {
+        .attrs = ad9834_attributes,
+        .is_visible = ad9834_attr_is_visible,
+};
+
+static int __devinit ad9834_probe(struct spi_device *spi)
+{
+        struct ad9834_platform_data *pdata = spi->dev.platform_data;
+        struct ad9834_state *st;
+        int ret;
+
+        if (!pdata) {
+                dev_dbg(&spi->dev, "no platform data?\n");
+                return -ENODEV;
+        }
+
+        st = kzalloc(sizeof(*st), GFP_KERNEL);
+        if (st == NULL) {
+                ret = -ENOMEM;
+                goto error_ret;
+        }
+
+        st->reg = regulator_get(&spi->dev, "vcc");
+        if (!IS_ERR(st->reg)) {
+                ret = regulator_enable(st->reg);
+                if (ret)
+                        goto error_put_reg;
+        }
+
+        st->mclk = pdata->mclk;
+
+        spi_set_drvdata(spi, st);
+
+        st->spi = spi;
+        st->devid = spi_get_device_id(spi)->driver_data;
+
+        st->indio_dev = iio_allocate_device();
+        if (st->indio_dev == NULL) {
+                ret = -ENOMEM;
+                goto error_disable_reg;
+        }
+
+        st->indio_dev->dev.parent = &spi->dev;
+        st->indio_dev->attrs = &ad9834_attribute_group;
+        st->indio_dev->dev_data = (void *) st;
+        st->indio_dev->driver_module = THIS_MODULE;
+        st->indio_dev->modes = INDIO_DIRECT_MODE;
+
+        /* Setup default messages */
+
+        st->xfer.tx_buf = &st->data;
+        st->xfer.len = 2;
+
+        spi_message_init(&st->msg);
+        spi_message_add_tail(&st->xfer, &st->msg);
+
+        st->freq_xfer[0].tx_buf = &st->freq_data[0];
+        st->freq_xfer[0].len = 2;
+        st->freq_xfer[0].cs_change = 1;
+        st->freq_xfer[1].tx_buf = &st->freq_data[1];
+        st->freq_xfer[1].len = 2;
+
+        spi_message_init(&st->freq_msg);
+        spi_message_add_tail(&st->freq_xfer[0], &st->freq_msg);
+        spi_message_add_tail(&st->freq_xfer[1], &st->freq_msg);
+
+        st->control = AD9834_B28 | AD9834_RESET;
+
+        if (!pdata->en_div2)
+                st->control |= AD9834_DIV2;
+
+        if (!pdata->en_signbit_msb_out && (st->devid == ID_AD9834))
+                st->control |= AD9834_SIGN_PIB;
+
+        st->data = cpu_to_be16(AD9834_REG_CMD | st->control);
+        ret = spi_sync(st->spi, &st->msg);
+        if (ret) {
+                dev_err(&spi->dev, "device init failed\n");
+                goto error_free_device;
+        }
+
+        ret = ad9834_write_frequency(st, AD9834_REG_FREQ0, pdata->freq0);
+        if (ret)
+                goto error_free_device;
+
+        ret = ad9834_write_frequency(st, AD9834_REG_FREQ1, pdata->freq1);
+        if (ret)
+                goto error_free_device;
+
+        ret = ad9834_write_phase(st, AD9834_REG_PHASE0, pdata->phase0);
+        if (ret)
+                goto error_free_device;
+
+        ret = ad9834_write_phase(st, AD9834_REG_PHASE1, pdata->phase1);
+        if (ret)
+                goto error_free_device;
+
+        ret = iio_device_register(st->indio_dev);
+        if (ret)
+                goto error_free_device;
+
+        return 0;
+
+error_free_device:
+        iio_free_device(st->indio_dev);
+error_disable_reg:
+        if (!IS_ERR(st->reg))
+                regulator_disable(st->reg);
+error_put_reg:
+        if (!IS_ERR(st->reg))
+                regulator_put(st->reg);
+        kfree(st);
+error_ret:
+        return ret;
+}
+
+static int __devexit ad9834_remove(struct spi_device *spi)
+{
+        struct ad9834_state *st = spi_get_drvdata(spi);
+
+        iio_device_unregister(st->indio_dev);
+        if (!IS_ERR(st->reg)) {
+                regulator_disable(st->reg);
+                regulator_put(st->reg);
+        }
+        kfree(st);
+        return 0;
+}
+
+static const struct spi_device_id ad9834_id[] = {
+        {"ad9833", ID_AD9833},
+        {"ad9834", ID_AD9834},
+        {}
+};
+
+static struct spi_driver ad9834_driver = {
+        .driver = {
+                .name   = "ad9834",
+                .bus    = &spi_bus_type,
+                .owner  = THIS_MODULE,
+        },
+        .probe          = ad9834_probe,
+        .remove         = __devexit_p(ad9834_remove),
+        .id_table       = ad9834_id,
+};
+
+static int __init ad9834_init(void)
+{
+        return spi_register_driver(&ad9834_driver);
+}
+module_init(ad9834_init);
+
+static void __exit ad9834_exit(void)
+{
+        spi_unregister_driver(&ad9834_driver);
+}
+module_exit(ad9834_exit);
+
+MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
+MODULE_DESCRIPTION("Analog Devices AD9833/AD9834 DDS");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("spi:ad9834");
diff --git a/drivers/staging/iio/dds/ad9834.h b/drivers/staging/iio/dds/ad9834.h
new file mode 100644
index 00000000000..0fc3b8859e9
--- /dev/null
+++ b/drivers/staging/iio/dds/ad9834.h
@@ -0,0 +1,112 @@
+/*
+ * AD9834 SPI DDS driver
+ *
+ * Copyright 2010 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2 or later.
+ */
+#ifndef IIO_DDS_AD9834_H_
+#define IIO_DDS_AD9834_H_
+
+/* Registers */
+
+#define AD9834_REG_CMD          (0 << 14)
+#define AD9834_REG_FREQ0        (1 << 14)
+#define AD9834_REG_FREQ1        (2 << 14)
+#define AD9834_REG_PHASE0       (6 << 13)
+#define AD9834_REG_PHASE1       (7 << 13)
+
+/* Command Control Bits */
+
+#define AD9834_B28              (1 << 13)
+#define AD9834_HLB              (1 << 12)
+#define AD9834_FSEL             (1 << 11)
+#define AD9834_PSEL             (1 << 10)
+#define AD9834_PIN_SW           (1 << 9)
+#define AD9834_RESET            (1 << 8)
+#define AD9834_SLEEP1           (1 << 7)
+#define AD9834_SLEEP12          (1 << 6)
+#define AD9834_OPBITEN          (1 << 5)
+#define AD9834_SIGN_PIB         (1 << 4)
+#define AD9834_DIV2             (1 << 3)
+#define AD9834_MODE             (1 << 1)
+
+#define AD9834_FREQ_BITS        28
+#define AD9834_PHASE_BITS       12
+
+#define RES_MASK(bits)  ((1 << (bits)) - 1)
+
+/**
+ * struct ad9834_state - driver instance specific data
+ * @indio_dev:          the industrial I/O device
+ * @spi:                spi_device
+ * @reg:                supply regulator
+ * @mclk:               external master clock
+ * @control:            cached control word
+ * @xfer:               default spi transfer
+ * @msg:                default spi message
+ * @freq_xfer:          tuning word spi transfer
+ * @freq_msg:           tuning word spi message
+ * @data:               spi transmit buffer
+ * @freq_data:          tuning word spi transmit buffer
+ */
+
+struct ad9834_state {
+        struct iio_dev                  *indio_dev;
+        struct spi_device               *spi;
+        struct regulator                *reg;
+        unsigned int                    mclk;
+        unsigned short                  control;
+        unsigned short                  devid;
+        struct spi_transfer             xfer;
+        struct spi_message              msg;
+        struct spi_transfer             freq_xfer[2];
+        struct spi_message              freq_msg;
+
+        /*
+         * DMA (thus cache coherency maintenance) requires the
+         * transfer buffers to live in their own cache lines.
+         */
+        unsigned short                  data ____cacheline_aligned;
+        unsigned short                  freq_data[2] ;
+};
+
+
+/*
+ * TODO: struct ad7887_platform_data needs to go into include/linux/iio
+ */
+
+/**
+ * struct ad9834_platform_data - platform specific information
+ * @mclk:               master clock in Hz
+ * @freq0:              power up freq0 tuning word in Hz
+ * @freq1:              power up freq1 tuning word in Hz
+ * @phase0:             power up phase0 value [0..4095] correlates with 0..2PI
+ * @phase1:             power up phase1 value [0..4095] correlates with 0..2PI
+ * @en_div2:            digital output/2 is passed to the SIGN BIT OUT pin
+ * @en_signbit_msb_out: the MSB (or MSB/2) of the DAC data is connected to the
+ *                      SIGN BIT OUT pin. en_div2 controls whether it is the MSB
+ *                      or MSB/2 that is output. if en_signbit_msb_out=false,
+ *                      the on-board comparator is connected to SIGN BIT OUT
+ */
+
+struct ad9834_platform_data {
+        unsigned int            mclk;
+        unsigned int            freq0;
+        unsigned int            freq1;
+        unsigned short          phase0;
+        unsigned short          phase1;
+        bool                    en_div2;
+        bool                    en_signbit_msb_out;
+};
+
+/**
+ * ad9834_supported_device_ids:
+ */
+
+enum ad9834_supported_device_ids {
+        ID_AD9833,
+        ID_AD9834,
+};
+
+#endif /* IIO_DDS_AD9834_H_ */