This patch adds support for the AD5592R (spi) and AD5593R (i2c)
ADC/DAC devices.
Signed-off-by: Paul Cercueil <paul.cercueil@xxxxxxxxxx>
---
drivers/iio/dac/Kconfig | 27 ++++
drivers/iio/dac/Makefile | 3 +
drivers/iio/dac/ad5592r-base.c | 289 ++++++++++++++++++++++++++++++++++
drivers/iio/dac/ad5592r-base.h | 56 +++++++
drivers/iio/dac/ad5592r.c | 126 +++++++++++++++
drivers/iio/dac/ad5593r.c | 121 ++++++++++++++
include/dt-bindings/iio/adi,ad5592r.h | 13 ++
7 files changed, 635 insertions(+)
create mode 100644 drivers/iio/dac/ad5592r-base.c
create mode 100644 drivers/iio/dac/ad5592r-base.h
create mode 100644 drivers/iio/dac/ad5592r.c
create mode 100644 drivers/iio/dac/ad5593r.c
create mode 100644 include/dt-bindings/iio/adi,ad5592r.h
v2: Introduced changes suggested by upstream feedback
diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig
index e701e28..be7bb04 100644
--- a/drivers/iio/dac/Kconfig
+++ b/drivers/iio/dac/Kconfig
@@ -72,6 +72,33 @@ config AD5449
To compile this driver as a module, choose M here: the
module will be called ad5449.
+config AD5592R_BASE
+ tristate
+
+config AD5592R
+ tristate "Analog Devices AD5592R ADC/DAC driver"
+ depends on SPI_MASTER
+ depends on OF
+ select AD5592R_BASE
+ help
+ Say yes here to build support for Analog Devices AD5592R
+ Digital to Analog / Analog to Digital Converter.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ad5592r.
+
+config AD5593R
+ tristate "Analog Devices AD5593R ADC/DAC driver"
+ depends on I2C
+ depends on OF
+ select AD5592R_BASE
+ help
+ Say yes here to build support for Analog Devices AD5593R
+ Digital to Analog / Analog to Digital Converter.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ad5593r.
+
config AD5504
tristate "Analog Devices AD5504/AD5501 DAC SPI driver"
depends on SPI
diff --git a/drivers/iio/dac/Makefile b/drivers/iio/dac/Makefile
index 63ae056..ae00b67 100644
--- a/drivers/iio/dac/Makefile
+++ b/drivers/iio/dac/Makefile
@@ -11,6 +11,9 @@ obj-$(CONFIG_AD5064) += ad5064.o
obj-$(CONFIG_AD5504) += ad5504.o
obj-$(CONFIG_AD5446) += ad5446.o
obj-$(CONFIG_AD5449) += ad5449.o
+obj-$(CONFIG_AD5592R_BASE) += ad5592r-base.o
+obj-$(CONFIG_AD5592R) += ad5592r.o
+obj-$(CONFIG_AD5593R) += ad5593r.o
obj-$(CONFIG_AD5755) += ad5755.o
obj-$(CONFIG_AD5764) += ad5764.o
obj-$(CONFIG_AD5791) += ad5791.o
diff --git a/drivers/iio/dac/ad5592r-base.c b/drivers/iio/dac/ad5592r-base.c
new file mode 100644
index 0000000..c1132fd
--- /dev/null
+++ b/drivers/iio/dac/ad5592r-base.c
@@ -0,0 +1,289 @@
+/*
+ * AD5592R Digital <-> Analog converters driver
+ *
+ * Copyright 2014 Analog Devices Inc.
+ * Author: Paul Cercueil <paul.cercueil@xxxxxxxxxx>
+ *
+ * Licensed under the GPL-2.
+ */
+
+/*
+ * TODO:
+ * - Add support for using channels as GPIOs
+ */
+
+#include "ad5592r-base.h"
+
+#include <dt-bindings/iio/adi,ad5592r.h>
+
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of.h>
+
+static int ad5592r_set_channel_modes(struct ad5592r_state *st)
+{
+ const struct ad5592r_rw_ops *ops = st->ops;
+ int ret;
+ unsigned i;
+ struct iio_dev *iio_dev = iio_priv_to_dev(st);
+ u8 pulldown = 0, open_drain = 0, tristate = 0,
+ dac = 0, adc = 0, gpio_in = 0, gpio_out = 0;
+ u16 read_back;
+
+ for (i = 0; i < st->num_channels; i++) {
+ switch (st->channel_modes[i]) {
+ case CH_MODE_DAC:
+ dac |= BIT(i);
+
+ /* fall-through */
+ case CH_MODE_ADC:
+ adc |= BIT(i);
+ break;
+
+ case CH_MODE_GPIO_OUT:
+ gpio_out |= BIT(i);
+
+ /* fall-through */
+ case CH_MODE_GPIO_IN:
+ gpio_in |= BIT(i);
+ break;
+
+ case CH_MODE_GPIO_OPEN_DRAIN:
+ open_drain |= BIT(i);
+ break;
+
+ case CH_MODE_GPIO_TRISTATE:
+ tristate |= BIT(i);
+ break;
+
+ default:
+ pulldown |= BIT(i);
+ break;
+ }
+ }
+
+ mutex_lock(&iio_dev->mlock);
+
+ /* Configure pins that we use */
+ ret = ops->reg_write(st, AD5592R_REG_DAC_EN, dac);
+ if (ret)
+ goto err_unlock;
+
+ ret = ops->reg_write(st, AD5592R_REG_ADC_EN, adc);
+ if (ret)
+ goto err_unlock;
+
+ ret = ops->reg_write(st, AD5592R_REG_GPIO_OUT_EN, gpio_out);
+ if (ret)
+ goto err_unlock;
+
+ ret = ops->reg_write(st, AD5592R_REG_GPIO_IN_EN, gpio_in);
+ if (ret)
+ goto err_unlock;
+
+ ret = ops->reg_write(st, AD5592R_REG_OPEN_DRAIN, open_drain);
+ if (ret)
+ goto err_unlock;
+
+ ret = ops->reg_write(st, AD5592R_REG_TRISTATE, tristate);
+ if (ret)
+ goto err_unlock;
+
+ /* Pull down unused pins to GND */
+ ret = ops->reg_write(st, AD5592R_REG_PULLDOWN, pulldown);
+ if (ret)
+ goto err_unlock;
+
+ /* Verify that we can read back at least one register */
+ ret = ops->reg_read(st, AD5592R_REG_ADC_EN, &read_back);
+ if (!ret && (read_back & 0xff) != adc)
+ ret = -EIO;
+
+err_unlock:
+ mutex_unlock(&iio_dev->mlock);
+ return ret;
+}
+
+static int ad5592r_write_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan, int val, int val2, long mask)
+{
+ struct ad5592r_state *st = iio_priv(iio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ if (val >= (1 << chan->scan_type.realbits) || val < 0)
+ return -EINVAL;
+
+ mutex_lock(&iio_dev->mlock);
+ ret = st->ops->dac_write(st, chan->address, val);
+ mutex_unlock(&iio_dev->mlock);
+ return ret;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int ad5592r_read_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long m)
+{
+ struct ad5592r_state *st = iio_priv(iio_dev);
+ u16 read_val;
+ int ret;
+
+ switch (m) {
+ case IIO_CHAN_INFO_RAW:
+ mutex_lock(&iio_dev->mlock);
+ ret = st->ops->adc_read(st, chan->channel, &read_val);
+ mutex_unlock(&iio_dev->mlock);
+ if (ret)
+ return ret;
+
+ if ((read_val >> 12 & 0x7) != chan->channel) {
+ dev_err(st->dev, "Error while reading channel %u\n",
+ chan->channel);
+ return -EIO;
+ }
+
+ read_val &= GENMASK(11, 0);
+
+ dev_dbg(st->dev, "ADC read: 0x%04hX\n", read_val);
+ *val = (int) read_val;
+ return IIO_VAL_INT;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static void ad5592r_reset(struct ad5592r_state *st)
+{
+ struct iio_dev *iio_dev = iio_priv_to_dev(st);
+
+ mutex_lock(&iio_dev->mlock);
+ st->ops->reg_write(st, AD5592R_REG_RESET, 0xdac);
+ udelay(250);
+ mutex_unlock(&iio_dev->mlock);
+}
+
+static const struct iio_info ad5592r_info = {
+ .read_raw = ad5592r_read_raw,
+ .write_raw = ad5592r_write_raw,
+ .driver_module = THIS_MODULE,
+};
+
+static void ad5592r_setup_channel(struct iio_dev *iio_dev,
+ struct iio_chan_spec *chan, bool output, unsigned id)
+{
+ chan->type = IIO_VOLTAGE;
+ chan->indexed = 1;
+ chan->output = output;
+ chan->channel = id;
+ chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
+ chan->address = id;
+ chan->scan_type.sign = 'u';
+ chan->scan_type.realbits = 12;
+ chan->scan_type.storagebits = 16;
+}
+
+static int ad5592r_alloc_channels(struct ad5592r_state *st)
+{
+ unsigned i, curr_channel = 0,
+ num_channels = st->num_channels;
+ struct iio_dev *iio_dev = iio_priv_to_dev(st);
+ struct iio_chan_spec *channels;
+ int ret;
+
+ ret = of_property_read_u8_array(st->dev->of_node, "channel-modes",
+ st->channel_modes, num_channels);
+ if (ret)
+ return ret;
+
+ channels = devm_kzalloc(st->dev,
+ 2 * num_channels * sizeof(*channels), GFP_KERNEL);
+ if (!channels)
+ return -ENOMEM;
+
+ for (i = 0; i < num_channels; i++) {
+ switch (st->channel_modes[i]) {
+ case CH_MODE_DAC:
+ ad5592r_setup_channel(iio_dev, &channels[curr_channel],
+ true, curr_channel);
+ curr_channel++;
+ break;
+
+ case CH_MODE_ADC:
+ ad5592r_setup_channel(iio_dev, &channels[curr_channel],
+ false, curr_channel);
+ curr_channel++;
+
+ /* fall-through */
+ default:
+ continue;
+ }
+ }
+
+ iio_dev->num_channels = curr_channel;
+ iio_dev->channels = channels;
+
+ return 0;
+}
+
+int ad5592r_probe(struct device *dev, const char *name,
+ const struct ad5592r_rw_ops *ops)
+{
+ struct iio_dev *iio_dev;
+ struct ad5592r_state *st;
+ int ret;
+
+ iio_dev = devm_iio_device_alloc(dev, sizeof(*st));
+ if (!iio_dev)
+ return -ENOMEM;
+
+ st = iio_priv(iio_dev);
+ st->dev = dev;
+ st->ops = ops;
+ st->num_channels = 8;
+ dev_set_drvdata(dev, iio_dev);
+
+ iio_dev->dev.parent = dev;
+ iio_dev->name = name;
+ iio_dev->info = &ad5592r_info;
+ iio_dev->modes = INDIO_DIRECT_MODE;
+
+ ad5592r_reset(st);
+
+ ret = ad5592r_alloc_channels(st);
+ if (ret)
+ return ret;
+
+ ret = ad5592r_set_channel_modes(st);
+ if (ret)
+ return ret;
+
+ return devm_iio_device_register(dev, iio_dev);
+}
+EXPORT_SYMBOL_GPL(ad5592r_probe);
+
+int ad5592r_remove(struct device *dev)
+{
+ struct iio_dev *iio_dev = dev_get_drvdata(dev);
+ struct ad5592r_state *st = iio_priv(iio_dev);
+ unsigned int i;
+
+ /* Reset all channels */
+ for (i = 0; i < ARRAY_SIZE(st->channel_modes); i++)
+ st->channel_modes[i] = CH_MODE_UNUSED;
+
+ return ad5592r_set_channel_modes(st);
+}
+EXPORT_SYMBOL_GPL(ad5592r_remove);
+
+MODULE_AUTHOR("Paul Cercueil <paul.cercueil@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Analog Devices AD5592R multi-channel converters");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/dac/ad5592r-base.h b/drivers/iio/dac/ad5592r-base.h
new file mode 100644
index 0000000..d722e0c
--- /dev/null
+++ b/drivers/iio/dac/ad5592r-base.h
@@ -0,0 +1,56 @@
+/*
+ * AD5592R / AD5593R Digital <-> Analog converters driver
+ *
+ * Copyright 2015 Analog Devices Inc.
+ * Author: Paul Cercueil <paul.cercueil@xxxxxxxxxx>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#ifndef __DRIVERS_IIO_DAC_AD5592R_BASE_H__
+#define __DRIVERS_IIO_DAC_AD5592R_BASE_H__
+
+#include <linux/types.h>
+#include <linux/cache.h>
+
+struct device;
+struct ad5592r_state;
+
+enum ad5592r_registers {
+ AD5592R_REG_NOOP = 0x0,
+ AD5592R_REG_DAC_READBACK = 0x1,
+ AD5592R_REG_ADC_SEQ = 0x2,
+ AD5592R_REG_CTRL = 0x3,
+ AD5592R_REG_ADC_EN = 0x4,
+ AD5592R_REG_DAC_EN = 0x5,
+ AD5592R_REG_PULLDOWN = 0x6,
+ AD5592R_REG_LDAC = 0x7,
+ AD5592R_REG_GPIO_OUT_EN = 0x8,
+ AD5592R_REG_GPIO_SET = 0x9,
+ AD5592R_REG_GPIO_IN_EN = 0xA,
+ AD5592R_REG_PD = 0xB,
+ AD5592R_REG_OPEN_DRAIN = 0xC,
+ AD5592R_REG_TRISTATE = 0xD,
+ AD5592R_REG_RESET = 0xF,
+};
+
+struct ad5592r_rw_ops {
+ int (*dac_write)(struct ad5592r_state *st, unsigned chan, u16 value);
+ int (*adc_read)(struct ad5592r_state *st, unsigned chan, u16 *value);
+ int (*reg_write)(struct ad5592r_state *st, u8 reg, u16 value);
+ int (*reg_read)(struct ad5592r_state *st, u8 reg, u16 *value);
+};
+
+struct ad5592r_state {
+ struct device *dev;
+ unsigned int num_channels;
+ const struct ad5592r_rw_ops *ops;
+ u8 channel_modes[8];
+ __be16 spi_msg ____cacheline_aligned;
+};
+
+int ad5592r_probe(struct device *dev, const char *name,
+ const struct ad5592r_rw_ops *ops);
+int ad5592r_remove(struct device *dev);
+
+#endif /* __DRIVERS_IIO_DAC_AD5592R_BASE_H__ */
diff --git a/drivers/iio/dac/ad5592r.c b/drivers/iio/dac/ad5592r.c
new file mode 100644
index 0000000..0572a36
--- /dev/null
+++ b/drivers/iio/dac/ad5592r.c
@@ -0,0 +1,126 @@
+/*
+ * AD5592R Digital <-> Analog converters driver
+ *
+ * Copyright 2015 Analog Devices Inc.
+ * Author: Paul Cercueil <paul.cercueil@xxxxxxxxxx>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include "ad5592r-base.h"
+
+#include <linux/bitops.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/spi/spi.h>
+
+static int ad5592r_dac_write(struct ad5592r_state *st, unsigned chan, u16 value)
+{
+ struct spi_device *spi = container_of(st->dev, struct spi_device, dev);
+
+ st->spi_msg = cpu_to_be16(BIT(15) | (chan << 12) | value);
+
+ return spi_write(spi, &st->spi_msg, sizeof(st->spi_msg));
+}
+
+static int ad5592r_adc_read(struct ad5592r_state *st, unsigned chan, u16 *value)
+{
+ struct spi_device *spi = container_of(st->dev, struct spi_device, dev);
+ int ret;
+
+ st->spi_msg = cpu_to_be16((AD5592R_REG_ADC_SEQ << 11) | BIT(chan));
+
+ ret = spi_write(spi, &st->spi_msg, sizeof(st->spi_msg));
+ if (ret)
+ return ret;
+
+ /* Invalid data */
+ ret = spi_read(spi, &st->spi_msg, sizeof(st->spi_msg));
+ if (ret)
+ return ret;
+
+ ret = spi_read(spi, &st->spi_msg, sizeof(st->spi_msg));
+ if (ret)
+ return ret;
+
+ *value = be16_to_cpu(st->spi_msg);
+
+ return 0;
+}
+
+static int ad5592r_reg_write(struct ad5592r_state *st, u8 reg, u16 value)
+{
+ struct spi_device *spi = container_of(st->dev, struct spi_device, dev);
+
+ st->spi_msg = cpu_to_be16((reg << 11) | value);
+
+ return spi_write(spi, &st->spi_msg, sizeof(st->spi_msg));
+}
+
+static int ad5592r_reg_read(struct ad5592r_state *st, u8 reg, u16 *value)
+{
+ struct spi_device *spi = container_of(st->dev, struct spi_device, dev);
+ int ret;
+
+ st->spi_msg = cpu_to_be16(
+ (AD5592R_REG_LDAC << 11) | BIT(6) | (reg << 2));
+
+ ret = spi_write(spi, &st->spi_msg, sizeof(st->spi_msg));
+ if (ret)
+ return ret;
+
+ ret = spi_read(spi, &st->spi_msg, sizeof(st->spi_msg));
+ if (ret)
+ return ret;
+
+ if (value)
+ *value = be16_to_cpu(st->spi_msg);
+
+ return 0;
+}
+
+static const struct ad5592r_rw_ops ad5592r_rw_ops = {
+ .dac_write = ad5592r_dac_write,
+ .adc_read = ad5592r_adc_read,
+ .reg_write = ad5592r_reg_write,
+ .reg_read = ad5592r_reg_read,
+};
+
+static int ad5592r_spi_probe(struct spi_device *spi)
+{
+ const struct spi_device_id *id = spi_get_device_id(spi);
+
+ return ad5592r_probe(&spi->dev, id->name, &ad5592r_rw_ops);
+}
+
+static int ad5592r_spi_remove(struct spi_device *spi)
+{
+ return ad5592r_remove(&spi->dev);
+}
+
+static const struct spi_device_id ad5592r_spi_ids[] = {
+ { .name = "ad5592r", },
+ {}
+};
+MODULE_DEVICE_TABLE(spi, ad5592r_spi_ids);
+
+static const struct of_device_id ad5592r_of_match[] = {
+ { .compatible = "adi,ad5592r", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ad5592r_of_match);
+
+static struct spi_driver ad5592r_spi_driver = {
+ .driver = {
+ .name = "ad5592r",
+ .of_match_table = of_match_ptr(ad5592r_of_match),
+ },
+ .probe = ad5592r_spi_probe,
+ .remove = ad5592r_spi_remove,
+ .id_table = ad5592r_spi_ids,
+};
+module_spi_driver(ad5592r_spi_driver);
+
+MODULE_AUTHOR("Paul Cercueil <paul.cercueil@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Analog Devices AD5592R multi-channel converters");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/dac/ad5593r.c b/drivers/iio/dac/ad5593r.c
new file mode 100644
index 0000000..6825834
--- /dev/null
+++ b/drivers/iio/dac/ad5593r.c
@@ -0,0 +1,121 @@
+/*
+ * AD5593R Digital <-> Analog converters driver
+ *
+ * Copyright 2015 Analog Devices Inc.
+ * Author: Paul Cercueil <paul.cercueil@xxxxxxxxxx>
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include "ad5592r-base.h"
+
+#include <linux/bitops.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/of.h>
+
+#define AD5593R_MODE_CONF (0 << 4)
+#define AD5593R_MODE_DAC_WRITE (1 << 4)
+#define AD5593R_MODE_ADC_READBACK (4 << 4)
+#define AD5593R_MODE_DAC_READBACK (5 << 4)
+#define AD5593R_MODE_GPIO_READBACK (6 << 4)
+#define AD5593R_MODE_REG_READBACK (7 << 4)
+
+static int ad5593r_dac_write(struct ad5592r_state *st, unsigned chan, u16 value)
+{
+ struct i2c_client *i2c = to_i2c_client(st->dev);
+
+ return i2c_smbus_write_word_swapped(i2c,
+ AD5593R_MODE_DAC_WRITE | chan, value);
+}
+
+static int ad5593r_adc_read(struct ad5592r_state *st, unsigned chan, u16 *value)
+{
+ struct i2c_client *i2c = to_i2c_client(st->dev);
+ s32 val;
+
+ val = i2c_smbus_write_word_swapped(i2c,
+ AD5593R_MODE_CONF | AD5592R_REG_ADC_SEQ, BIT(chan));
+ if (val < 0)
+ return (int) val;
+
+ /* Invalid data */
+ val = i2c_smbus_read_word_swapped(i2c, AD5593R_MODE_ADC_READBACK);
+ if (val < 0)
+ return (int) val;
+
+ val = i2c_smbus_read_word_swapped(i2c, AD5593R_MODE_ADC_READBACK);
+ if (val < 0)
+ return (int) val;
+
+ *value = (u16) val;
+
+ return 0;
+}
+
+static int ad5593r_reg_write(struct ad5592r_state *st, u8 reg, u16 value)
+{
+ struct i2c_client *i2c = to_i2c_client(st->dev);
+
+ return i2c_smbus_write_word_swapped(i2c,
+ AD5593R_MODE_CONF | reg, value);
+}
+
+static int ad5593r_reg_read(struct ad5592r_state *st, u8 reg, u16 *value)
+{
+ struct i2c_client *i2c = to_i2c_client(st->dev);
+ s32 val;
+
+ val = i2c_smbus_read_word_swapped(i2c, AD5593R_MODE_REG_READBACK | reg);
+ if (val < 0)
+ return (int) val;
+
+ *value = (u16) val;
+
+ return 0;
+}
+
+static const struct ad5592r_rw_ops ad5593r_rw_ops = {
+ .dac_write = ad5593r_dac_write,
+ .adc_read = ad5593r_adc_read,
+ .reg_write = ad5593r_reg_write,
+ .reg_read = ad5593r_reg_read,
+};
+
+static int ad5593r_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ return ad5592r_probe(&i2c->dev, id->name, &ad5593r_rw_ops);
+}
+
+static int ad5593r_i2c_remove(struct i2c_client *i2c)
+{
+ return ad5592r_remove(&i2c->dev);
+}
+
+static const struct i2c_device_id ad5593r_i2c_ids[] = {
+ { .name = "ad5593r", },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, ad5593r_i2c_ids);
+
+static const struct of_device_id ad5593r_of_match[] = {
+ { .compatible = "adi,ad5593r", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ad5593r_of_match);
+
+static struct i2c_driver ad5593r_driver = {
+ .driver = {
+ .name = "ad5593r",
+ .of_match_table = of_match_ptr(ad5593r_of_match),
+ },
+ .probe = ad5593r_i2c_probe,
+ .remove = ad5593r_i2c_remove,
+ .id_table = ad5593r_i2c_ids,
+};
+module_i2c_driver(ad5593r_driver);
+
+MODULE_AUTHOR("Paul Cercueil <paul.cercueil@xxxxxxxxxx>");
+MODULE_DESCRIPTION("Analog Devices AD5592R multi-channel converters");
+MODULE_LICENSE("GPL v2");
diff --git a/include/dt-bindings/iio/adi,ad5592r.h b/include/dt-bindings/iio/adi,ad5592r.h
new file mode 100644
index 0000000..fcb6293
--- /dev/null
+++ b/include/dt-bindings/iio/adi,ad5592r.h
@@ -0,0 +1,13 @@
+
+#ifndef _DT_BINDINGS_ADI_AD5592R_H
+#define _DT_BINDINGS_ADI_AD5592R_H
+
+#define CH_MODE_UNUSED 0
+#define CH_MODE_DAC 1
+#define CH_MODE_ADC 2
+#define CH_MODE_GPIO_OUT 3
+#define CH_MODE_GPIO_IN 4
+#define CH_MODE_GPIO_OPEN_DRAIN 5
+#define CH_MODE_GPIO_TRISTATE 6
+
+#endif /* _DT_BINDINGS_ADI_AD5592R_H */
--
2.6.1
--
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