From: Paul Cercueil <[email protected]>
AD7091R5 is 4-Channel, I2C, Ultra Low Power,12-Bit ADC.
This driver will also support AD7091R2/4/8 in the future.
Datasheet:
Link: https://www.analog.com/media/en/technical-documentation/data-sheets/ad7091r-5.pdf
Signed-off-by: Paul Cercueil <[email protected]>
Co-developed-by: Beniamin Bia <[email protected]>
Signed-off-by: Beniamin Bia <[email protected]>
---
Changes in v5:
-nothing changed
drivers/iio/adc/Kconfig | 7 +
drivers/iio/adc/Makefile | 1 +
drivers/iio/adc/ad7091r-base.c | 260 +++++++++++++++++++++++++++++++++
drivers/iio/adc/ad7091r-base.h | 25 ++++
drivers/iio/adc/ad7091r5.c | 108 ++++++++++++++
5 files changed, 401 insertions(+)
create mode 100644 drivers/iio/adc/ad7091r-base.c
create mode 100644 drivers/iio/adc/ad7091r-base.h
create mode 100644 drivers/iio/adc/ad7091r5.c
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
index 7e3286265a38..80b1b9551749 100644
--- a/drivers/iio/adc/Kconfig
+++ b/drivers/iio/adc/Kconfig
@@ -22,6 +22,13 @@ config AD7124
To compile this driver as a module, choose M here: the module will be
called ad7124.
+config AD7091R5
+ tristate "Analog Devices AD7091R5 ADC Driver"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Say yes here to build support for Analog Devices AD7091R-5 ADC.
+
config AD7266
tristate "Analog Devices AD7265/AD7266 ADC driver"
depends on SPI_MASTER
diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
index ef9cc485fb67..55e44735aaac 100644
--- a/drivers/iio/adc/Makefile
+++ b/drivers/iio/adc/Makefile
@@ -6,6 +6,7 @@
# When adding new entries keep the list in alphabetical order
obj-$(CONFIG_AD_SIGMA_DELTA) += ad_sigma_delta.o
obj-$(CONFIG_AD7124) += ad7124.o
+obj-$(CONFIG_AD7091R5) += ad7091r5.o ad7091r-base.o
obj-$(CONFIG_AD7266) += ad7266.o
obj-$(CONFIG_AD7291) += ad7291.o
obj-$(CONFIG_AD7298) += ad7298.o
diff --git a/drivers/iio/adc/ad7091r-base.c b/drivers/iio/adc/ad7091r-base.c
new file mode 100644
index 000000000000..854de7c654c2
--- /dev/null
+++ b/drivers/iio/adc/ad7091r-base.c
@@ -0,0 +1,260 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AD7091RX Analog to Digital converter driver
+ *
+ * Copyright 2014-2019 Analog Devices Inc.
+ */
+
+#include <linux/bitops.h>
+#include <linux/iio/events.h>
+#include <linux/iio/iio.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "ad7091r-base.h"
+
+#define AD7091R_REG_RESULT 0
+#define AD7091R_REG_CHANNEL 1
+#define AD7091R_REG_CONF 2
+#define AD7091R_REG_ALERT 3
+#define AD7091R_REG_CH_LOW_LIMIT(ch) ((ch) * 3 + 4)
+#define AD7091R_REG_CH_HIGH_LIMIT(ch) ((ch) * 3 + 5)
+#define AD7091R_REG_CH_HYSTERESIS(ch) ((ch) * 3 + 6)
+
+/* AD7091R_REG_RESULT */
+#define AD7091R_REG_RESULT_CH_ID(x) (((x) >> 13) & 0x3)
+#define AD7091R_REG_RESULT_CONV_RESULT(x) ((x) & 0xfff)
+
+/* AD7091R_REG_CONF */
+#define AD7091R_REG_CONF_AUTO BIT(8)
+#define AD7091R_REG_CONF_CMD BIT(10)
+
+#define AD7091R_REG_CONF_MODE_MASK \
+ (AD7091R_REG_CONF_AUTO | AD7091R_REG_CONF_CMD)
+
+enum ad7091r_mode {
+ AD7091R_MODE_SAMPLE,
+ AD7091R_MODE_COMMAND,
+ AD7091R_MODE_AUTOCYCLE,
+};
+
+struct ad7091r_state {
+ struct device *dev;
+ struct regmap *map;
+ const struct ad7091r_chip_info *chip_info;
+ enum ad7091r_mode mode;
+ struct mutex lock; /*lock to prevent concurent reads */
+};
+
+static int ad7091r_set_mode(struct ad7091r_state *st, enum ad7091r_mode mode)
+{
+ int ret, conf;
+
+ switch (mode) {
+ case AD7091R_MODE_SAMPLE:
+ conf = 0;
+ break;
+ case AD7091R_MODE_COMMAND:
+ conf = AD7091R_REG_CONF_CMD;
+ break;
+ case AD7091R_MODE_AUTOCYCLE:
+ conf = AD7091R_REG_CONF_AUTO;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = regmap_update_bits(st->map, AD7091R_REG_CONF,
+ AD7091R_REG_CONF_MODE_MASK, conf);
+ if (ret)
+ return ret;
+
+ st->mode = mode;
+
+ return 0;
+}
+
+static int ad7091r_set_channel(struct ad7091r_state *st, unsigned int channel)
+{
+ unsigned int dummy;
+ int ret;
+
+ /* AD7091R_REG_CHANNEL specified which channels to be converted */
+ ret = regmap_write(st->map, AD7091R_REG_CHANNEL,
+ BIT(channel) | (BIT(channel) << 8));
+ if (ret)
+ return ret;
+
+ /*
+ * There is a latency of one conversion before the channel conversion
+ * sequence is updated
+ */
+ return regmap_read(st->map, AD7091R_REG_RESULT, &dummy);
+}
+
+static int ad7091r_read_one(struct iio_dev *iio_dev,
+ unsigned int channel, unsigned int *read_val)
+{
+ struct ad7091r_state *st = iio_priv(iio_dev);
+ unsigned int val;
+ int ret;
+
+ ret = ad7091r_set_channel(st, channel);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(st->map, AD7091R_REG_RESULT, &val);
+ if (ret)
+ return ret;
+
+ if (AD7091R_REG_RESULT_CH_ID(val) != channel)
+ return -EIO;
+
+ *read_val = AD7091R_REG_RESULT_CONV_RESULT(val);
+
+ return 0;
+}
+
+static int ad7091r_read_raw(struct iio_dev *iio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long m)
+{
+ struct ad7091r_state *st = iio_priv(iio_dev);
+ unsigned int read_val;
+ int ret;
+
+ mutex_lock(&st->lock);
+
+ switch (m) {
+ case IIO_CHAN_INFO_RAW:
+ if (st->mode != AD7091R_MODE_COMMAND) {
+ ret = -EBUSY;
+ goto unlock;
+ }
+
+ ret = ad7091r_read_one(iio_dev, chan->channel, &read_val);
+ if (ret)
+ goto unlock;
+
+ *val = read_val;
+ ret = IIO_VAL_INT;
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+unlock:
+ mutex_unlock(&st->lock);
+ return ret;
+}
+
+static const struct iio_info ad7091r_info = {
+ .read_raw = ad7091r_read_raw,
+};
+
+static irqreturn_t ad7091r_event_handler(int irq, void *private)
+{
+ struct ad7091r_state *st = (struct ad7091r_state *) private;
+ struct iio_dev *iio_dev = dev_get_drvdata(st->dev);
+ unsigned int i, read_val;
+ int ret;
+ s64 timestamp = iio_get_time_ns(iio_dev);
+
+ ret = regmap_read(st->map, AD7091R_REG_ALERT, &read_val);
+ if (ret)
+ return IRQ_HANDLED;
+
+ for (i = 0; i < st->chip_info->num_channels; i++) {
+ if (read_val & BIT(i * 2))
+ iio_push_event(iio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, i,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_RISING), timestamp);
+ if (read_val & BIT(i * 2 + 1))
+ iio_push_event(iio_dev,
+ IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, i,
+ IIO_EV_TYPE_THRESH,
+ IIO_EV_DIR_FALLING), timestamp);
+ }
+
+ return IRQ_HANDLED;
+}
+
+int ad7091r_probe(struct device *dev, const char *name,
+ const struct ad7091r_chip_info *chip_info,
+ struct regmap *map, int irq)
+{
+ struct iio_dev *iio_dev;
+ struct ad7091r_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->chip_info = chip_info;
+ st->map = map;
+
+ iio_dev->dev.parent = dev;
+ iio_dev->name = name;
+ iio_dev->info = &ad7091r_info;
+ iio_dev->modes = INDIO_DIRECT_MODE;
+
+ iio_dev->num_channels = chip_info->num_channels;
+ iio_dev->channels = chip_info->channels;
+
+ if (irq) {
+ ret = devm_request_threaded_irq(dev, irq, NULL,
+ ad7091r_event_handler,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT, name, st);
+ if (ret)
+ return ret;
+ }
+
+ /* Use command mode by default to convert only desired channels*/
+ ret = ad7091r_set_mode(st, AD7091R_MODE_COMMAND);
+ if (ret)
+ return ret;
+
+ return devm_iio_device_register(dev, iio_dev);
+}
+EXPORT_SYMBOL_GPL(ad7091r_probe);
+
+static bool ad7091r_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case AD7091R_REG_RESULT:
+ case AD7091R_REG_ALERT:
+ return false;
+ default:
+ return true;
+ }
+}
+
+static bool ad7091r_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case AD7091R_REG_RESULT:
+ case AD7091R_REG_ALERT:
+ return true;
+ default:
+ return false;
+ }
+}
+
+const struct regmap_config ad7091r_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 16,
+ .writeable_reg = ad7091r_writeable_reg,
+ .volatile_reg = ad7091r_volatile_reg,
+};
+EXPORT_SYMBOL_GPL(ad7091r_regmap_config);
+
+MODULE_AUTHOR("Beniamin Bia <[email protected]>");
+MODULE_DESCRIPTION("Analog Devices AD7091Rx multi-channel converters");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/iio/adc/ad7091r-base.h b/drivers/iio/adc/ad7091r-base.h
new file mode 100644
index 000000000000..b0b4fe01a681
--- /dev/null
+++ b/drivers/iio/adc/ad7091r-base.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * AD7091RX Analog to Digital converter driver
+ *
+ * Copyright 2014-2019 Analog Devices Inc.
+ */
+
+#ifndef __DRIVERS_IIO_ADC_AD7091R_BASE_H__
+#define __DRIVERS_IIO_ADC_AD7091R_BASE_H__
+
+struct device;
+struct ad7091r_state;
+
+struct ad7091r_chip_info {
+ unsigned int num_channels;
+ const struct iio_chan_spec *channels;
+};
+
+extern const struct regmap_config ad7091r_regmap_config;
+
+int ad7091r_probe(struct device *dev, const char *name,
+ const struct ad7091r_chip_info *chip_info,
+ struct regmap *map, int irq);
+
+#endif /* __DRIVERS_IIO_ADC_AD7091R_BASE_H__ */
diff --git a/drivers/iio/adc/ad7091r5.c b/drivers/iio/adc/ad7091r5.c
new file mode 100644
index 000000000000..30ff0108a6ed
--- /dev/null
+++ b/drivers/iio/adc/ad7091r5.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * AD7091R5 Analog to Digital converter driver
+ *
+ * Copyright 2014-2019 Analog Devices Inc.
+ */
+
+#include <linux/i2c.h>
+#include <linux/iio/iio.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "ad7091r-base.h"
+
+static const struct iio_event_spec ad7091r5_events[] = {
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_RISING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_FALLING,
+ .mask_separate = BIT(IIO_EV_INFO_VALUE) |
+ BIT(IIO_EV_INFO_ENABLE),
+ },
+ {
+ .type = IIO_EV_TYPE_THRESH,
+ .dir = IIO_EV_DIR_EITHER,
+ .mask_separate = BIT(IIO_EV_INFO_HYSTERESIS),
+ },
+};
+
+#define AD7091R_CHANNEL(idx, bits, ev, num_ev) { \
+ .type = IIO_VOLTAGE, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .indexed = 1, \
+ .channel = idx, \
+ .event_spec = ev, \
+ .num_event_specs = num_ev, \
+}
+static const struct iio_chan_spec ad7091r5_channels_irq[] = {
+ AD7091R_CHANNEL(0, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
+ AD7091R_CHANNEL(1, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
+ AD7091R_CHANNEL(2, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
+ AD7091R_CHANNEL(3, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
+};
+
+static const struct iio_chan_spec ad7091r5_channels_noirq[] = {
+ AD7091R_CHANNEL(0, 12, NULL, 0),
+ AD7091R_CHANNEL(1, 12, NULL, 0),
+ AD7091R_CHANNEL(2, 12, NULL, 0),
+ AD7091R_CHANNEL(3, 12, NULL, 0),
+};
+
+static const struct ad7091r_chip_info ad7091r5_chip_info_irq = {
+ .channels = ad7091r5_channels_irq,
+ .num_channels = ARRAY_SIZE(ad7091r5_channels_irq),
+};
+
+static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = {
+ .channels = ad7091r5_channels_noirq,
+ .num_channels = ARRAY_SIZE(ad7091r5_channels_noirq),
+};
+
+static int ad7091r5_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ const struct ad7091r_chip_info *chip_info;
+ struct regmap *map = devm_regmap_init_i2c(i2c, &ad7091r_regmap_config);
+
+ if (IS_ERR(map))
+ return PTR_ERR(map);
+
+ if (i2c->irq)
+ chip_info = &ad7091r5_chip_info_irq;
+ else
+ chip_info = &ad7091r5_chip_info_noirq;
+
+ return ad7091r_probe(&i2c->dev, id->name, chip_info, map, i2c->irq);
+}
+
+static const struct of_device_id ad7091r5_dt_ids[] = {
+ { .compatible = "adi,ad7091r5" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ad7091r5_dt_ids);
+
+static const struct i2c_device_id ad7091r5_i2c_ids[] = {
+ {"ad7091r5", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, ad7091r5_i2c_ids);
+
+static struct i2c_driver ad7091r5_driver = {
+ .driver = {
+ .name = "ad7091r5",
+ .of_match_table = ad7091r5_dt_ids,
+ },
+ .probe = ad7091r5_i2c_probe,
+ .id_table = ad7091r5_i2c_ids,
+};
+module_i2c_driver(ad7091r5_driver);
+
+MODULE_AUTHOR("Beniamin Bia <[email protected]>");
+MODULE_DESCRIPTION("Analog Devices AD7091R5 multi-channel ADC driver");
+MODULE_LICENSE("GPL v2");
--
2.17.1
Add Beniamin Bia as a maintainer for AD7091R5 ADC.
Signed-off-by: Beniamin Bia <[email protected]>
---
Changes in v5:
-nothing changed
MAINTAINERS | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index 2e01d0f0b0e5..7f1e4b88688f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -893,6 +893,14 @@ S: Supported
F: drivers/iio/dac/ad5758.c
F: Documentation/devicetree/bindings/iio/dac/ad5758.txt
+ANALOG DEVICES INC AD7091R5 DRIVER
+M: Beniamin Bia <[email protected]>
+L: [email protected]
+W: http://ez.analog.com/community/linux-device-drivers
+S: Supported
+F: drivers/iio/adc/ad7091r5.c
+F: Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
+
ANALOG DEVICES INC AD7124 DRIVER
M: Stefan Popa <[email protected]>
L: [email protected]
--
2.17.1
From: Paul Cercueil <[email protected]>
The scale can now be obtained with the "in_voltage_scale" file.
By default, the scale returned corresponds to the internal VREF of 2.5V.
It is possible to use an external VREF (through the REFIN/REFOUT pin of
the chip), by passing a regulator to the driver. The scale will then be
calculated according to the voltage reported by the regulator.
Signed-off-by: Paul Cercueil <[email protected]>
Co-developed-by: Beniamin Bia <[email protected]>
Signed-off-by: Beniamin Bia <[email protected]>
---
Changes in v5:
-check if error is -eprobe instead of eprobe
-one bracket aligned
drivers/iio/adc/ad7091r-base.c | 38 ++++++++++++++++++++++++++++++++++
drivers/iio/adc/ad7091r-base.h | 1 +
drivers/iio/adc/ad7091r5.c | 5 +++++
3 files changed, 44 insertions(+)
diff --git a/drivers/iio/adc/ad7091r-base.c b/drivers/iio/adc/ad7091r-base.c
index 854de7c654c2..58fcf1ff8c76 100644
--- a/drivers/iio/adc/ad7091r-base.c
+++ b/drivers/iio/adc/ad7091r-base.c
@@ -11,6 +11,7 @@
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
#include "ad7091r-base.h"
@@ -42,6 +43,7 @@ enum ad7091r_mode {
struct ad7091r_state {
struct device *dev;
struct regmap *map;
+ struct regulator *vref;
const struct ad7091r_chip_info *chip_info;
enum ad7091r_mode mode;
struct mutex lock; /*lock to prevent concurent reads */
@@ -141,6 +143,21 @@ static int ad7091r_read_raw(struct iio_dev *iio_dev,
ret = IIO_VAL_INT;
break;
+ case IIO_CHAN_INFO_SCALE:
+ if (st->vref) {
+ ret = regulator_get_voltage(st->vref);
+ if (ret < 0)
+ goto unlock;
+
+ *val = ret / 1000;
+ } else {
+ *val = st->chip_info->vref_mV;
+ }
+
+ *val2 = chan->scan_type.realbits;
+ ret = IIO_VAL_FRACTIONAL_LOG2;
+ break;
+
default:
ret = -EINVAL;
break;
@@ -183,6 +200,13 @@ static irqreturn_t ad7091r_event_handler(int irq, void *private)
return IRQ_HANDLED;
}
+static void ad7091r_remove(void *data)
+{
+ struct ad7091r_state *st = data;
+
+ regulator_disable(st->vref);
+}
+
int ad7091r_probe(struct device *dev, const char *name,
const struct ad7091r_chip_info *chip_info,
struct regmap *map, int irq)
@@ -216,6 +240,20 @@ int ad7091r_probe(struct device *dev, const char *name,
return ret;
}
+ st->vref = devm_regulator_get_optional(dev, "vref");
+ if (IS_ERR(st->vref)) {
+ if (PTR_ERR(st->reg) == -EPROBE_DEFER)
+ return -EPROBE_DEFER;
+ st->vref = NULL;
+ } else {
+ ret = regulator_enable(st->vref);
+ if (ret)
+ return ret;
+ ret = devm_add_action_or_reset(dev, ad7091r_remove, st);
+ if (ret)
+ return ret;
+ }
+
/* Use command mode by default to convert only desired channels*/
ret = ad7091r_set_mode(st, AD7091R_MODE_COMMAND);
if (ret)
diff --git a/drivers/iio/adc/ad7091r-base.h b/drivers/iio/adc/ad7091r-base.h
index b0b4fe01a681..509748aef9b1 100644
--- a/drivers/iio/adc/ad7091r-base.h
+++ b/drivers/iio/adc/ad7091r-base.h
@@ -14,6 +14,7 @@ struct ad7091r_state;
struct ad7091r_chip_info {
unsigned int num_channels;
const struct iio_chan_spec *channels;
+ unsigned int vref_mV;
};
extern const struct regmap_config ad7091r_regmap_config;
diff --git a/drivers/iio/adc/ad7091r5.c b/drivers/iio/adc/ad7091r5.c
index 30ff0108a6ed..9665679c3ea6 100644
--- a/drivers/iio/adc/ad7091r5.c
+++ b/drivers/iio/adc/ad7091r5.c
@@ -35,10 +35,13 @@ static const struct iio_event_spec ad7091r5_events[] = {
#define AD7091R_CHANNEL(idx, bits, ev, num_ev) { \
.type = IIO_VOLTAGE, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
.indexed = 1, \
.channel = idx, \
.event_spec = ev, \
.num_event_specs = num_ev, \
+ .scan_type.storagebits = 16, \
+ .scan_type.realbits = bits, \
}
static const struct iio_chan_spec ad7091r5_channels_irq[] = {
AD7091R_CHANNEL(0, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
@@ -57,11 +60,13 @@ static const struct iio_chan_spec ad7091r5_channels_noirq[] = {
static const struct ad7091r_chip_info ad7091r5_chip_info_irq = {
.channels = ad7091r5_channels_irq,
.num_channels = ARRAY_SIZE(ad7091r5_channels_irq),
+ .vref_mV = 2500,
};
static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = {
.channels = ad7091r5_channels_noirq,
.num_channels = ARRAY_SIZE(ad7091r5_channels_noirq),
+ .vref_mV = 2500,
};
static int ad7091r5_i2c_probe(struct i2c_client *i2c,
--
2.17.1
Documentation for AD7091R5 ADC was added.
Signed-off-by: Beniamin Bia <[email protected]>
Reviewed-by: Rob Herring <[email protected]>
---
Changes in v5:
-nothing changed
.../bindings/iio/adc/adi,ad7091r5.yaml | 54 +++++++++++++++++++
1 file changed, 54 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
new file mode 100644
index 000000000000..31ffa275f5fa
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
@@ -0,0 +1,54 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/adc/adi,ad7091r5.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Analog Devices AD7091R5 4-Channel 12-Bit ADC
+
+maintainers:
+ - Beniamin Bia <[email protected]>
+
+description: |
+ Analog Devices AD7091R5 4-Channel 12-Bit ADC
+ https://www.analog.com/media/en/technical-documentation/data-sheets/ad7091r-5.pdf
+
+properties:
+ compatible:
+ enum:
+ - adi,ad7091r5
+
+ reg:
+ maxItems: 1
+
+ vref-supply:
+ description:
+ Phandle to the vref power supply
+
+ interrupts:
+ maxItems: 1
+
+
+required:
+ - compatible
+ - reg
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ adc@2f {
+ compatible = "adi,ad7091r5";
+ reg = <0x2f>;
+
+ interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
+ interrupt-parent = <&gpio>;
+ };
+ };
+...
--
2.17.1
On Fri, 15 Nov 2019 15:57:22 +0200
Beniamin Bia <[email protected]> wrote:
> Documentation for AD7091R5 ADC was added.
>
> Signed-off-by: Beniamin Bia <[email protected]>
> Reviewed-by: Rob Herring <[email protected]>
Applied.
Thanks,
Jonathan
> ---
> Changes in v5:
> -nothing changed
>
> .../bindings/iio/adc/adi,ad7091r5.yaml | 54 +++++++++++++++++++
> 1 file changed, 54 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
>
> diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
> new file mode 100644
> index 000000000000..31ffa275f5fa
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
> @@ -0,0 +1,54 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/iio/adc/adi,ad7091r5.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Analog Devices AD7091R5 4-Channel 12-Bit ADC
> +
> +maintainers:
> + - Beniamin Bia <[email protected]>
> +
> +description: |
> + Analog Devices AD7091R5 4-Channel 12-Bit ADC
> + https://www.analog.com/media/en/technical-documentation/data-sheets/ad7091r-5.pdf
> +
> +properties:
> + compatible:
> + enum:
> + - adi,ad7091r5
> +
> + reg:
> + maxItems: 1
> +
> + vref-supply:
> + description:
> + Phandle to the vref power supply
> +
> + interrupts:
> + maxItems: 1
> +
> +
> +required:
> + - compatible
> + - reg
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/gpio/gpio.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> + i2c {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + adc@2f {
> + compatible = "adi,ad7091r5";
> + reg = <0x2f>;
> +
> + interrupts = <25 IRQ_TYPE_EDGE_FALLING>;
> + interrupt-parent = <&gpio>;
> + };
> + };
> +...
On Fri, 15 Nov 2019 15:57:23 +0200
Beniamin Bia <[email protected]> wrote:
> Add Beniamin Bia as a maintainer for AD7091R5 ADC.
>
> Signed-off-by: Beniamin Bia <[email protected]>
Applied,
Thanks,
Jonathan
> ---
> Changes in v5:
> -nothing changed
>
> MAINTAINERS | 8 ++++++++
> 1 file changed, 8 insertions(+)
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 2e01d0f0b0e5..7f1e4b88688f 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -893,6 +893,14 @@ S: Supported
> F: drivers/iio/dac/ad5758.c
> F: Documentation/devicetree/bindings/iio/dac/ad5758.txt
>
> +ANALOG DEVICES INC AD7091R5 DRIVER
> +M: Beniamin Bia <[email protected]>
> +L: [email protected]
> +W: http://ez.analog.com/community/linux-device-drivers
> +S: Supported
> +F: drivers/iio/adc/ad7091r5.c
> +F: Documentation/devicetree/bindings/iio/adc/adi,ad7091r5.yaml
> +
> ANALOG DEVICES INC AD7124 DRIVER
> M: Stefan Popa <[email protected]>
> L: [email protected]
On Fri, 15 Nov 2019 15:57:21 +0200
Beniamin Bia <[email protected]> wrote:
> From: Paul Cercueil <[email protected]>
>
> The scale can now be obtained with the "in_voltage_scale" file.
> By default, the scale returned corresponds to the internal VREF of 2.5V.
>
> It is possible to use an external VREF (through the REFIN/REFOUT pin of
> the chip), by passing a regulator to the driver. The scale will then be
> calculated according to the voltage reported by the regulator.
>
> Signed-off-by: Paul Cercueil <[email protected]>
> Co-developed-by: Beniamin Bia <[email protected]>
> Signed-off-by: Beniamin Bia <[email protected]>
Doesn't build. However I've fixed it up and applied
to the togreg branch of iio.git pushed out as testing so the
build bots can run more tests.
Please check the result.
Jonathan
> ---
> Changes in v5:
> -check if error is -eprobe instead of eprobe
> -one bracket aligned
>
> drivers/iio/adc/ad7091r-base.c | 38 ++++++++++++++++++++++++++++++++++
> drivers/iio/adc/ad7091r-base.h | 1 +
> drivers/iio/adc/ad7091r5.c | 5 +++++
> 3 files changed, 44 insertions(+)
>
> diff --git a/drivers/iio/adc/ad7091r-base.c b/drivers/iio/adc/ad7091r-base.c
> index 854de7c654c2..58fcf1ff8c76 100644
> --- a/drivers/iio/adc/ad7091r-base.c
> +++ b/drivers/iio/adc/ad7091r-base.c
> @@ -11,6 +11,7 @@
> #include <linux/interrupt.h>
> #include <linux/module.h>
> #include <linux/regmap.h>
> +#include <linux/regulator/consumer.h>
>
> #include "ad7091r-base.h"
>
> @@ -42,6 +43,7 @@ enum ad7091r_mode {
> struct ad7091r_state {
> struct device *dev;
> struct regmap *map;
> + struct regulator *vref;
> const struct ad7091r_chip_info *chip_info;
> enum ad7091r_mode mode;
> struct mutex lock; /*lock to prevent concurent reads */
> @@ -141,6 +143,21 @@ static int ad7091r_read_raw(struct iio_dev *iio_dev,
> ret = IIO_VAL_INT;
> break;
>
> + case IIO_CHAN_INFO_SCALE:
> + if (st->vref) {
> + ret = regulator_get_voltage(st->vref);
> + if (ret < 0)
> + goto unlock;
> +
> + *val = ret / 1000;
> + } else {
> + *val = st->chip_info->vref_mV;
> + }
> +
> + *val2 = chan->scan_type.realbits;
> + ret = IIO_VAL_FRACTIONAL_LOG2;
> + break;
> +
> default:
> ret = -EINVAL;
> break;
> @@ -183,6 +200,13 @@ static irqreturn_t ad7091r_event_handler(int irq, void *private)
> return IRQ_HANDLED;
> }
>
> +static void ad7091r_remove(void *data)
> +{
> + struct ad7091r_state *st = data;
> +
> + regulator_disable(st->vref);
> +}
> +
> int ad7091r_probe(struct device *dev, const char *name,
> const struct ad7091r_chip_info *chip_info,
> struct regmap *map, int irq)
> @@ -216,6 +240,20 @@ int ad7091r_probe(struct device *dev, const char *name,
> return ret;
> }
>
> + st->vref = devm_regulator_get_optional(dev, "vref");
> + if (IS_ERR(st->vref)) {
> + if (PTR_ERR(st->reg) == -EPROBE_DEFER)
I'm going to optimistically hope this was a last minute edit and
you have tested this driver thoroughly.
st->vref?
> + return -EPROBE_DEFER;
> + st->vref = NULL;
> + } else {
> + ret = regulator_enable(st->vref);
> + if (ret)
> + return ret;
> + ret = devm_add_action_or_reset(dev, ad7091r_remove, st);
> + if (ret)
> + return ret;
> + }
> +
> /* Use command mode by default to convert only desired channels*/
> ret = ad7091r_set_mode(st, AD7091R_MODE_COMMAND);
> if (ret)
> diff --git a/drivers/iio/adc/ad7091r-base.h b/drivers/iio/adc/ad7091r-base.h
> index b0b4fe01a681..509748aef9b1 100644
> --- a/drivers/iio/adc/ad7091r-base.h
> +++ b/drivers/iio/adc/ad7091r-base.h
> @@ -14,6 +14,7 @@ struct ad7091r_state;
> struct ad7091r_chip_info {
> unsigned int num_channels;
> const struct iio_chan_spec *channels;
> + unsigned int vref_mV;
> };
>
> extern const struct regmap_config ad7091r_regmap_config;
> diff --git a/drivers/iio/adc/ad7091r5.c b/drivers/iio/adc/ad7091r5.c
> index 30ff0108a6ed..9665679c3ea6 100644
> --- a/drivers/iio/adc/ad7091r5.c
> +++ b/drivers/iio/adc/ad7091r5.c
> @@ -35,10 +35,13 @@ static const struct iio_event_spec ad7091r5_events[] = {
> #define AD7091R_CHANNEL(idx, bits, ev, num_ev) { \
> .type = IIO_VOLTAGE, \
> .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
> + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
> .indexed = 1, \
> .channel = idx, \
> .event_spec = ev, \
> .num_event_specs = num_ev, \
> + .scan_type.storagebits = 16, \
> + .scan_type.realbits = bits, \
> }
> static const struct iio_chan_spec ad7091r5_channels_irq[] = {
> AD7091R_CHANNEL(0, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
> @@ -57,11 +60,13 @@ static const struct iio_chan_spec ad7091r5_channels_noirq[] = {
> static const struct ad7091r_chip_info ad7091r5_chip_info_irq = {
> .channels = ad7091r5_channels_irq,
> .num_channels = ARRAY_SIZE(ad7091r5_channels_irq),
> + .vref_mV = 2500,
> };
>
> static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = {
> .channels = ad7091r5_channels_noirq,
> .num_channels = ARRAY_SIZE(ad7091r5_channels_noirq),
> + .vref_mV = 2500,
> };
>
> static int ad7091r5_i2c_probe(struct i2c_client *i2c,
On Fri, 15 Nov 2019 15:57:20 +0200
Beniamin Bia <[email protected]> wrote:
> From: Paul Cercueil <[email protected]>
>
> AD7091R5 is 4-Channel, I2C, Ultra Low Power,12-Bit ADC.
>
> This driver will also support AD7091R2/4/8 in the future.
>
> Datasheet:
> Link: https://www.analog.com/media/en/technical-documentation/data-sheets/ad7091r-5.pdf
>
> Signed-off-by: Paul Cercueil <[email protected]>
> Co-developed-by: Beniamin Bia <[email protected]>
> Signed-off-by: Beniamin Bia <[email protected]>
Applied to the togreg branch of iio.git and pushed out as testing for
the autobuilders to play with it.
Thanks,
Jonathan
> ---
> Changes in v5:
> -nothing changed
>
> drivers/iio/adc/Kconfig | 7 +
> drivers/iio/adc/Makefile | 1 +
> drivers/iio/adc/ad7091r-base.c | 260 +++++++++++++++++++++++++++++++++
> drivers/iio/adc/ad7091r-base.h | 25 ++++
> drivers/iio/adc/ad7091r5.c | 108 ++++++++++++++
> 5 files changed, 401 insertions(+)
> create mode 100644 drivers/iio/adc/ad7091r-base.c
> create mode 100644 drivers/iio/adc/ad7091r-base.h
> create mode 100644 drivers/iio/adc/ad7091r5.c
>
> diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig
> index 7e3286265a38..80b1b9551749 100644
> --- a/drivers/iio/adc/Kconfig
> +++ b/drivers/iio/adc/Kconfig
> @@ -22,6 +22,13 @@ config AD7124
> To compile this driver as a module, choose M here: the module will be
> called ad7124.
>
> +config AD7091R5
> + tristate "Analog Devices AD7091R5 ADC Driver"
> + depends on I2C
> + select REGMAP_I2C
> + help
> + Say yes here to build support for Analog Devices AD7091R-5 ADC.
> +
> config AD7266
> tristate "Analog Devices AD7265/AD7266 ADC driver"
> depends on SPI_MASTER
> diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile
> index ef9cc485fb67..55e44735aaac 100644
> --- a/drivers/iio/adc/Makefile
> +++ b/drivers/iio/adc/Makefile
> @@ -6,6 +6,7 @@
> # When adding new entries keep the list in alphabetical order
> obj-$(CONFIG_AD_SIGMA_DELTA) += ad_sigma_delta.o
> obj-$(CONFIG_AD7124) += ad7124.o
> +obj-$(CONFIG_AD7091R5) += ad7091r5.o ad7091r-base.o
> obj-$(CONFIG_AD7266) += ad7266.o
> obj-$(CONFIG_AD7291) += ad7291.o
> obj-$(CONFIG_AD7298) += ad7298.o
> diff --git a/drivers/iio/adc/ad7091r-base.c b/drivers/iio/adc/ad7091r-base.c
> new file mode 100644
> index 000000000000..854de7c654c2
> --- /dev/null
> +++ b/drivers/iio/adc/ad7091r-base.c
> @@ -0,0 +1,260 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * AD7091RX Analog to Digital converter driver
> + *
> + * Copyright 2014-2019 Analog Devices Inc.
> + */
> +
> +#include <linux/bitops.h>
> +#include <linux/iio/events.h>
> +#include <linux/iio/iio.h>
> +#include <linux/interrupt.h>
> +#include <linux/module.h>
> +#include <linux/regmap.h>
> +
> +#include "ad7091r-base.h"
> +
> +#define AD7091R_REG_RESULT 0
> +#define AD7091R_REG_CHANNEL 1
> +#define AD7091R_REG_CONF 2
> +#define AD7091R_REG_ALERT 3
> +#define AD7091R_REG_CH_LOW_LIMIT(ch) ((ch) * 3 + 4)
> +#define AD7091R_REG_CH_HIGH_LIMIT(ch) ((ch) * 3 + 5)
> +#define AD7091R_REG_CH_HYSTERESIS(ch) ((ch) * 3 + 6)
> +
> +/* AD7091R_REG_RESULT */
> +#define AD7091R_REG_RESULT_CH_ID(x) (((x) >> 13) & 0x3)
> +#define AD7091R_REG_RESULT_CONV_RESULT(x) ((x) & 0xfff)
> +
> +/* AD7091R_REG_CONF */
> +#define AD7091R_REG_CONF_AUTO BIT(8)
> +#define AD7091R_REG_CONF_CMD BIT(10)
> +
> +#define AD7091R_REG_CONF_MODE_MASK \
> + (AD7091R_REG_CONF_AUTO | AD7091R_REG_CONF_CMD)
> +
> +enum ad7091r_mode {
> + AD7091R_MODE_SAMPLE,
> + AD7091R_MODE_COMMAND,
> + AD7091R_MODE_AUTOCYCLE,
> +};
> +
> +struct ad7091r_state {
> + struct device *dev;
> + struct regmap *map;
> + const struct ad7091r_chip_info *chip_info;
> + enum ad7091r_mode mode;
> + struct mutex lock; /*lock to prevent concurent reads */
> +};
> +
> +static int ad7091r_set_mode(struct ad7091r_state *st, enum ad7091r_mode mode)
> +{
> + int ret, conf;
> +
> + switch (mode) {
> + case AD7091R_MODE_SAMPLE:
> + conf = 0;
> + break;
> + case AD7091R_MODE_COMMAND:
> + conf = AD7091R_REG_CONF_CMD;
> + break;
> + case AD7091R_MODE_AUTOCYCLE:
> + conf = AD7091R_REG_CONF_AUTO;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + ret = regmap_update_bits(st->map, AD7091R_REG_CONF,
> + AD7091R_REG_CONF_MODE_MASK, conf);
> + if (ret)
> + return ret;
> +
> + st->mode = mode;
> +
> + return 0;
> +}
> +
> +static int ad7091r_set_channel(struct ad7091r_state *st, unsigned int channel)
> +{
> + unsigned int dummy;
> + int ret;
> +
> + /* AD7091R_REG_CHANNEL specified which channels to be converted */
> + ret = regmap_write(st->map, AD7091R_REG_CHANNEL,
> + BIT(channel) | (BIT(channel) << 8));
> + if (ret)
> + return ret;
> +
> + /*
> + * There is a latency of one conversion before the channel conversion
> + * sequence is updated
> + */
> + return regmap_read(st->map, AD7091R_REG_RESULT, &dummy);
> +}
> +
> +static int ad7091r_read_one(struct iio_dev *iio_dev,
> + unsigned int channel, unsigned int *read_val)
> +{
> + struct ad7091r_state *st = iio_priv(iio_dev);
> + unsigned int val;
> + int ret;
> +
> + ret = ad7091r_set_channel(st, channel);
> + if (ret)
> + return ret;
> +
> + ret = regmap_read(st->map, AD7091R_REG_RESULT, &val);
> + if (ret)
> + return ret;
> +
> + if (AD7091R_REG_RESULT_CH_ID(val) != channel)
> + return -EIO;
> +
> + *read_val = AD7091R_REG_RESULT_CONV_RESULT(val);
> +
> + return 0;
> +}
> +
> +static int ad7091r_read_raw(struct iio_dev *iio_dev,
> + struct iio_chan_spec const *chan,
> + int *val, int *val2, long m)
> +{
> + struct ad7091r_state *st = iio_priv(iio_dev);
> + unsigned int read_val;
> + int ret;
> +
> + mutex_lock(&st->lock);
> +
> + switch (m) {
> + case IIO_CHAN_INFO_RAW:
> + if (st->mode != AD7091R_MODE_COMMAND) {
> + ret = -EBUSY;
> + goto unlock;
> + }
> +
> + ret = ad7091r_read_one(iio_dev, chan->channel, &read_val);
> + if (ret)
> + goto unlock;
> +
> + *val = read_val;
> + ret = IIO_VAL_INT;
> + break;
> +
> + default:
> + ret = -EINVAL;
> + break;
> + }
> +
> +unlock:
> + mutex_unlock(&st->lock);
> + return ret;
> +}
> +
> +static const struct iio_info ad7091r_info = {
> + .read_raw = ad7091r_read_raw,
> +};
> +
> +static irqreturn_t ad7091r_event_handler(int irq, void *private)
> +{
> + struct ad7091r_state *st = (struct ad7091r_state *) private;
> + struct iio_dev *iio_dev = dev_get_drvdata(st->dev);
> + unsigned int i, read_val;
> + int ret;
> + s64 timestamp = iio_get_time_ns(iio_dev);
> +
> + ret = regmap_read(st->map, AD7091R_REG_ALERT, &read_val);
> + if (ret)
> + return IRQ_HANDLED;
> +
> + for (i = 0; i < st->chip_info->num_channels; i++) {
> + if (read_val & BIT(i * 2))
> + iio_push_event(iio_dev,
> + IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, i,
> + IIO_EV_TYPE_THRESH,
> + IIO_EV_DIR_RISING), timestamp);
> + if (read_val & BIT(i * 2 + 1))
> + iio_push_event(iio_dev,
> + IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE, i,
> + IIO_EV_TYPE_THRESH,
> + IIO_EV_DIR_FALLING), timestamp);
> + }
> +
> + return IRQ_HANDLED;
> +}
> +
> +int ad7091r_probe(struct device *dev, const char *name,
> + const struct ad7091r_chip_info *chip_info,
> + struct regmap *map, int irq)
> +{
> + struct iio_dev *iio_dev;
> + struct ad7091r_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->chip_info = chip_info;
> + st->map = map;
> +
> + iio_dev->dev.parent = dev;
> + iio_dev->name = name;
> + iio_dev->info = &ad7091r_info;
> + iio_dev->modes = INDIO_DIRECT_MODE;
> +
> + iio_dev->num_channels = chip_info->num_channels;
> + iio_dev->channels = chip_info->channels;
> +
> + if (irq) {
> + ret = devm_request_threaded_irq(dev, irq, NULL,
> + ad7091r_event_handler,
> + IRQF_TRIGGER_FALLING | IRQF_ONESHOT, name, st);
> + if (ret)
> + return ret;
> + }
> +
> + /* Use command mode by default to convert only desired channels*/
> + ret = ad7091r_set_mode(st, AD7091R_MODE_COMMAND);
> + if (ret)
> + return ret;
> +
> + return devm_iio_device_register(dev, iio_dev);
> +}
> +EXPORT_SYMBOL_GPL(ad7091r_probe);
> +
> +static bool ad7091r_writeable_reg(struct device *dev, unsigned int reg)
> +{
> + switch (reg) {
> + case AD7091R_REG_RESULT:
> + case AD7091R_REG_ALERT:
> + return false;
> + default:
> + return true;
> + }
> +}
> +
> +static bool ad7091r_volatile_reg(struct device *dev, unsigned int reg)
> +{
> + switch (reg) {
> + case AD7091R_REG_RESULT:
> + case AD7091R_REG_ALERT:
> + return true;
> + default:
> + return false;
> + }
> +}
> +
> +const struct regmap_config ad7091r_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 16,
> + .writeable_reg = ad7091r_writeable_reg,
> + .volatile_reg = ad7091r_volatile_reg,
> +};
> +EXPORT_SYMBOL_GPL(ad7091r_regmap_config);
> +
> +MODULE_AUTHOR("Beniamin Bia <[email protected]>");
> +MODULE_DESCRIPTION("Analog Devices AD7091Rx multi-channel converters");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/iio/adc/ad7091r-base.h b/drivers/iio/adc/ad7091r-base.h
> new file mode 100644
> index 000000000000..b0b4fe01a681
> --- /dev/null
> +++ b/drivers/iio/adc/ad7091r-base.h
> @@ -0,0 +1,25 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * AD7091RX Analog to Digital converter driver
> + *
> + * Copyright 2014-2019 Analog Devices Inc.
> + */
> +
> +#ifndef __DRIVERS_IIO_ADC_AD7091R_BASE_H__
> +#define __DRIVERS_IIO_ADC_AD7091R_BASE_H__
> +
> +struct device;
> +struct ad7091r_state;
> +
> +struct ad7091r_chip_info {
> + unsigned int num_channels;
> + const struct iio_chan_spec *channels;
> +};
> +
> +extern const struct regmap_config ad7091r_regmap_config;
> +
> +int ad7091r_probe(struct device *dev, const char *name,
> + const struct ad7091r_chip_info *chip_info,
> + struct regmap *map, int irq);
> +
> +#endif /* __DRIVERS_IIO_ADC_AD7091R_BASE_H__ */
> diff --git a/drivers/iio/adc/ad7091r5.c b/drivers/iio/adc/ad7091r5.c
> new file mode 100644
> index 000000000000..30ff0108a6ed
> --- /dev/null
> +++ b/drivers/iio/adc/ad7091r5.c
> @@ -0,0 +1,108 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * AD7091R5 Analog to Digital converter driver
> + *
> + * Copyright 2014-2019 Analog Devices Inc.
> + */
> +
> +#include <linux/i2c.h>
> +#include <linux/iio/iio.h>
> +#include <linux/module.h>
> +#include <linux/regmap.h>
> +
> +#include "ad7091r-base.h"
> +
> +static const struct iio_event_spec ad7091r5_events[] = {
> + {
> + .type = IIO_EV_TYPE_THRESH,
> + .dir = IIO_EV_DIR_RISING,
> + .mask_separate = BIT(IIO_EV_INFO_VALUE) |
> + BIT(IIO_EV_INFO_ENABLE),
> + },
> + {
> + .type = IIO_EV_TYPE_THRESH,
> + .dir = IIO_EV_DIR_FALLING,
> + .mask_separate = BIT(IIO_EV_INFO_VALUE) |
> + BIT(IIO_EV_INFO_ENABLE),
> + },
> + {
> + .type = IIO_EV_TYPE_THRESH,
> + .dir = IIO_EV_DIR_EITHER,
> + .mask_separate = BIT(IIO_EV_INFO_HYSTERESIS),
> + },
> +};
> +
> +#define AD7091R_CHANNEL(idx, bits, ev, num_ev) { \
> + .type = IIO_VOLTAGE, \
> + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
> + .indexed = 1, \
> + .channel = idx, \
> + .event_spec = ev, \
> + .num_event_specs = num_ev, \
> +}
> +static const struct iio_chan_spec ad7091r5_channels_irq[] = {
> + AD7091R_CHANNEL(0, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
> + AD7091R_CHANNEL(1, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
> + AD7091R_CHANNEL(2, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
> + AD7091R_CHANNEL(3, 12, ad7091r5_events, ARRAY_SIZE(ad7091r5_events)),
> +};
> +
> +static const struct iio_chan_spec ad7091r5_channels_noirq[] = {
> + AD7091R_CHANNEL(0, 12, NULL, 0),
> + AD7091R_CHANNEL(1, 12, NULL, 0),
> + AD7091R_CHANNEL(2, 12, NULL, 0),
> + AD7091R_CHANNEL(3, 12, NULL, 0),
> +};
> +
> +static const struct ad7091r_chip_info ad7091r5_chip_info_irq = {
> + .channels = ad7091r5_channels_irq,
> + .num_channels = ARRAY_SIZE(ad7091r5_channels_irq),
> +};
> +
> +static const struct ad7091r_chip_info ad7091r5_chip_info_noirq = {
> + .channels = ad7091r5_channels_noirq,
> + .num_channels = ARRAY_SIZE(ad7091r5_channels_noirq),
> +};
> +
> +static int ad7091r5_i2c_probe(struct i2c_client *i2c,
> + const struct i2c_device_id *id)
> +{
> + const struct ad7091r_chip_info *chip_info;
> + struct regmap *map = devm_regmap_init_i2c(i2c, &ad7091r_regmap_config);
> +
> + if (IS_ERR(map))
> + return PTR_ERR(map);
> +
> + if (i2c->irq)
> + chip_info = &ad7091r5_chip_info_irq;
> + else
> + chip_info = &ad7091r5_chip_info_noirq;
> +
> + return ad7091r_probe(&i2c->dev, id->name, chip_info, map, i2c->irq);
> +}
> +
> +static const struct of_device_id ad7091r5_dt_ids[] = {
> + { .compatible = "adi,ad7091r5" },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, ad7091r5_dt_ids);
> +
> +static const struct i2c_device_id ad7091r5_i2c_ids[] = {
> + {"ad7091r5", 0},
> + {}
> +};
> +MODULE_DEVICE_TABLE(i2c, ad7091r5_i2c_ids);
> +
> +static struct i2c_driver ad7091r5_driver = {
> + .driver = {
> + .name = "ad7091r5",
> + .of_match_table = ad7091r5_dt_ids,
> + },
> + .probe = ad7091r5_i2c_probe,
> + .id_table = ad7091r5_i2c_ids,
> +};
> +module_i2c_driver(ad7091r5_driver);
> +
> +MODULE_AUTHOR("Beniamin Bia <[email protected]>");
> +MODULE_DESCRIPTION("Analog Devices AD7091R5 multi-channel ADC driver");
> +MODULE_LICENSE("GPL v2");