staging:iio: Move ad799x driver out of staging

The driver is now at a reasonable quality level. Move it out of staging.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Hartmut Knaack <knaack.h@gmx.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 0 insertions, 794 deletions

diff --git a/drivers/staging/iio/adc/ad799x_core.c b/drivers/staging/iio/adc/ad799x_core.c
deleted file mode 100644
index bcbf6102efed..000000000000
--- a/drivers/staging/iio/adc/ad799x_core.c
+++ /dev/null
@@ -1,794 +0,0 @@
-/*
- * iio/adc/ad799x.c
- * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
- *
- * based on iio/adc/max1363
- * Copyright (C) 2008-2010 Jonathan Cameron
- *
- * based on linux/drivers/i2c/chips/max123x
- * Copyright (C) 2002-2004 Stefan Eletzhofer
- *
- * based on linux/drivers/acron/char/pcf8583.c
- * Copyright (C) 2000 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * ad799x.c
- *
- * Support for ad7991, ad7995, ad7999, ad7992, ad7993, ad7994, ad7997,
- * ad7998 and similar chips.
- *
- */
-
-#include <linux/interrupt.h>
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/sysfs.h>
-#include <linux/i2c.h>
-#include <linux/regulator/consumer.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-#include <linux/err.h>
-#include <linux/module.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
-#include <linux/iio/events.h>
-#include <linux/iio/buffer.h>
-#include <linux/iio/trigger_consumer.h>
-#include <linux/iio/triggered_buffer.h>
-
-#define AD799X_CHANNEL_SHIFT			4
-#define AD799X_STORAGEBITS			16
-/*
- * AD7991, AD7995 and AD7999 defines
- */
-
-#define AD7991_REF_SEL				0x08
-#define AD7991_FLTR				0x04
-#define AD7991_BIT_TRIAL_DELAY			0x02
-#define AD7991_SAMPLE_DELAY			0x01
-
-/*
- * AD7992, AD7993, AD7994, AD7997 and AD7998 defines
- */
-
-#define AD7998_FLTR				0x08
-#define AD7998_ALERT_EN				0x04
-#define AD7998_BUSY_ALERT			0x02
-#define AD7998_BUSY_ALERT_POL			0x01
-
-#define AD7998_CONV_RES_REG			0x0
-#define AD7998_ALERT_STAT_REG			0x1
-#define AD7998_CONF_REG				0x2
-#define AD7998_CYCLE_TMR_REG			0x3
-
-#define AD7998_DATALOW_REG(x)			((x) * 3 + 0x4)
-#define AD7998_DATAHIGH_REG(x)			((x) * 3 + 0x5)
-#define AD7998_HYST_REG(x)			((x) * 3 + 0x6)
-
-#define AD7998_CYC_MASK				0x7
-#define AD7998_CYC_DIS				0x0
-#define AD7998_CYC_TCONF_32			0x1
-#define AD7998_CYC_TCONF_64			0x2
-#define AD7998_CYC_TCONF_128			0x3
-#define AD7998_CYC_TCONF_256			0x4
-#define AD7998_CYC_TCONF_512			0x5
-#define AD7998_CYC_TCONF_1024			0x6
-#define AD7998_CYC_TCONF_2048			0x7
-
-#define AD7998_ALERT_STAT_CLEAR			0xFF
-
-/*
- * AD7997 and AD7997 defines
- */
-
-#define AD7997_8_READ_SINGLE			0x80
-#define AD7997_8_READ_SEQUENCE			0x70
-/* TODO: move this into a common header */
-#define RES_MASK(bits)	((1 << (bits)) - 1)
-
-enum {
-	ad7991,
-	ad7995,
-	ad7999,
-	ad7992,
-	ad7993,
-	ad7994,
-	ad7997,
-	ad7998
-};
-
-/**
- * struct ad799x_chip_info - chip specifc information
- * @channel:		channel specification
- * @num_channels:	number of channels
- * @monitor_mode:	whether the chip supports monitor interrupts
- * @default_config:	device default configuration
- * @event_attrs:	pointer to the monitor event attribute group
- */
-struct ad799x_chip_info {
-	struct iio_chan_spec		channel[9];
-	int				num_channels;
-	u16				default_config;
-	const struct iio_info		*info;
-};
-
-struct ad799x_state {
-	struct i2c_client		*client;
-	const struct ad799x_chip_info	*chip_info;
-	struct regulator		*reg;
-	struct regulator		*vref;
-	unsigned			id;
-	u16				config;
-
-	u8				*rx_buf;
-	unsigned int			transfer_size;
-};
-
-/**
- * ad799x_trigger_handler() bh of trigger launched polling to ring buffer
- *
- * Currently there is no option in this driver to disable the saving of
- * timestamps within the ring.
- **/
-static irqreturn_t ad799x_trigger_handler(int irq, void *p)
-{
-	struct iio_poll_func *pf = p;
-	struct iio_dev *indio_dev = pf->indio_dev;
-	struct ad799x_state *st = iio_priv(indio_dev);
-	int b_sent;
-	u8 cmd;
-
-	switch (st->id) {
-	case ad7991:
-	case ad7995:
-	case ad7999:
-		cmd = st->config |
-			(*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT);
-		break;
-	case ad7992:
-	case ad7993:
-	case ad7994:
-		cmd = (*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT) |
-			AD7998_CONV_RES_REG;
-		break;
-	case ad7997:
-	case ad7998:
-		cmd = AD7997_8_READ_SEQUENCE | AD7998_CONV_RES_REG;
-		break;
-	default:
-		cmd = 0;
-	}
-
-	b_sent = i2c_smbus_read_i2c_block_data(st->client,
-			cmd, st->transfer_size, st->rx_buf);
-	if (b_sent < 0)
-		goto out;
-
-	iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf,
-			iio_get_time_ns());
-out:
-	iio_trigger_notify_done(indio_dev->trig);
-
-	return IRQ_HANDLED;
-}
-
-/*
- * ad799x register access by I2C
- */
-static int ad799x_i2c_read16(struct ad799x_state *st, u8 reg, u16 *data)
-{
-	struct i2c_client *client = st->client;
-	int ret = 0;
-
-	ret = i2c_smbus_read_word_swapped(client, reg);
-	if (ret < 0) {
-		dev_err(&client->dev, "I2C read error\n");
-		return ret;
-	}
-
-	*data = (u16)ret;
-
-	return 0;
-}
-
-static int ad799x_i2c_read8(struct ad799x_state *st, u8 reg, u8 *data)
-{
-	struct i2c_client *client = st->client;
-	int ret = 0;
-
-	ret = i2c_smbus_read_byte_data(client, reg);
-	if (ret < 0) {
-		dev_err(&client->dev, "I2C read error\n");
-		return ret;
-	}
-
-	*data = (u8)ret;
-
-	return 0;
-}
-
-static int ad799x_i2c_write16(struct ad799x_state *st, u8 reg, u16 data)
-{
-	struct i2c_client *client = st->client;
-	int ret = 0;
-
-	ret = i2c_smbus_write_word_swapped(client, reg, data);
-	if (ret < 0)
-		dev_err(&client->dev, "I2C write error\n");
-
-	return ret;
-}
-
-static int ad799x_i2c_write8(struct ad799x_state *st, u8 reg, u8 data)
-{
-	struct i2c_client *client = st->client;
-	int ret = 0;
-
-	ret = i2c_smbus_write_byte_data(client, reg, data);
-	if (ret < 0)
-		dev_err(&client->dev, "I2C write error\n");
-
-	return ret;
-}
-
-static int ad7997_8_update_scan_mode(struct iio_dev *indio_dev,
-	const unsigned long *scan_mask)
-{
-	struct ad799x_state *st = iio_priv(indio_dev);
-
-	kfree(st->rx_buf);
-	st->rx_buf = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
-	if (!st->rx_buf)
-		return -ENOMEM;
-
-	st->transfer_size = bitmap_weight(scan_mask, indio_dev->masklength) * 2;
-
-	switch (st->id) {
-	case ad7997:
-	case ad7998:
-		return ad799x_i2c_write16(st, AD7998_CONF_REG,
-			st->config | (*scan_mask << AD799X_CHANNEL_SHIFT));
-	default:
-		break;
-	}
-
-	return 0;
-}
-
-static int ad799x_scan_direct(struct ad799x_state *st, unsigned ch)
-{
-	u16 rxbuf;
-	u8 cmd;
-	int ret;
-
-	switch (st->id) {
-	case ad7991:
-	case ad7995:
-	case ad7999:
-		cmd = st->config | ((1 << ch) << AD799X_CHANNEL_SHIFT);
-		break;
-	case ad7992:
-	case ad7993:
-	case ad7994:
-		cmd = (1 << ch) << AD799X_CHANNEL_SHIFT;
-		break;
-	case ad7997:
-	case ad7998:
-		cmd = (ch << AD799X_CHANNEL_SHIFT) | AD7997_8_READ_SINGLE;
-		break;
-	default:
-		return -EINVAL;
-	}
-
-	ret = ad799x_i2c_read16(st, cmd, &rxbuf);
-	if (ret < 0)
-		return ret;
-
-	return rxbuf;
-}
-
-static int ad799x_read_raw(struct iio_dev *indio_dev,
-			   struct iio_chan_spec const *chan,
-			   int *val,
-			   int *val2,
-			   long m)
-{
-	int ret;
-	struct ad799x_state *st = iio_priv(indio_dev);
-
-	switch (m) {
-	case IIO_CHAN_INFO_RAW:
-		mutex_lock(&indio_dev->mlock);
-		if (iio_buffer_enabled(indio_dev))
-			ret = -EBUSY;
-		else
-			ret = ad799x_scan_direct(st, chan->scan_index);
-		mutex_unlock(&indio_dev->mlock);
-
-		if (ret < 0)
-			return ret;
-		*val = (ret >> chan->scan_type.shift) &
-			RES_MASK(chan->scan_type.realbits);
-		return IIO_VAL_INT;
-	case IIO_CHAN_INFO_SCALE:
-		ret = regulator_get_voltage(st->vref);
-		if (ret < 0)
-			return ret;
-		*val = ret / 1000;
-		*val2 = chan->scan_type.realbits;
-		return IIO_VAL_FRACTIONAL_LOG2;
-	}
-	return -EINVAL;
-}
-static const unsigned int ad7998_frequencies[] = {
-	[AD7998_CYC_DIS]	= 0,
-	[AD7998_CYC_TCONF_32]	= 15625,
-	[AD7998_CYC_TCONF_64]	= 7812,
-	[AD7998_CYC_TCONF_128]	= 3906,
-	[AD7998_CYC_TCONF_512]	= 976,
-	[AD7998_CYC_TCONF_1024]	= 488,
-	[AD7998_CYC_TCONF_2048]	= 244,
-};
-static ssize_t ad799x_read_frequency(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
-{
-	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-	struct ad799x_state *st = iio_priv(indio_dev);
-
-	int ret;
-	u8 val;
-	ret = ad799x_i2c_read8(st, AD7998_CYCLE_TMR_REG, &val);
-	if (ret)
-		return ret;
-
-	val &= AD7998_CYC_MASK;
-
-	return sprintf(buf, "%u\n", ad7998_frequencies[val]);
-}
-
-static ssize_t ad799x_write_frequency(struct device *dev,
-					 struct device_attribute *attr,
-					 const char *buf,
-					 size_t len)
-{
-	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-	struct ad799x_state *st = iio_priv(indio_dev);
-
-	long val;
-	int ret, i;
-	u8 t;
-
-	ret = kstrtol(buf, 10, &val);
-	if (ret)
-		return ret;
-
-	mutex_lock(&indio_dev->mlock);
-	ret = ad799x_i2c_read8(st, AD7998_CYCLE_TMR_REG, &t);
-	if (ret)
-		goto error_ret_mutex;
-	/* Wipe the bits clean */
-	t &= ~AD7998_CYC_MASK;
-
-	for (i = 0; i < ARRAY_SIZE(ad7998_frequencies); i++)
-		if (val == ad7998_frequencies[i])
-			break;
-	if (i == ARRAY_SIZE(ad7998_frequencies)) {
-		ret = -EINVAL;
-		goto error_ret_mutex;
-	}
-	t |= i;
-	ret = ad799x_i2c_write8(st, AD7998_CYCLE_TMR_REG, t);
-
-error_ret_mutex:
-	mutex_unlock(&indio_dev->mlock);
-
-	return ret ? ret : len;
-}
-
-static int ad799x_read_event_config(struct iio_dev *indio_dev,
-				    const struct iio_chan_spec *chan,
-				    enum iio_event_type type,
-				    enum iio_event_direction dir)
-{
-	return 1;
-}
-
-static unsigned int ad799x_threshold_reg(const struct iio_chan_spec *chan,
-					 enum iio_event_direction dir,
-					 enum iio_event_info info)
-{
-	switch (info) {
-	case IIO_EV_INFO_VALUE:
-		if (dir == IIO_EV_DIR_FALLING)
-			return AD7998_DATALOW_REG(chan->channel);
-		else
-			return AD7998_DATAHIGH_REG(chan->channel);
-	case IIO_EV_INFO_HYSTERESIS:
-		return AD7998_HYST_REG(chan->channel);
-	default:
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int ad799x_write_event_value(struct iio_dev *indio_dev,
-				    const struct iio_chan_spec *chan,
-				    enum iio_event_type type,
-				    enum iio_event_direction dir,
-				    enum iio_event_info info,
-				    int val, int val2)
-{
-	int ret;
-	struct ad799x_state *st = iio_priv(indio_dev);
-
-	mutex_lock(&indio_dev->mlock);
-	ret = ad799x_i2c_write16(st, ad799x_threshold_reg(chan, dir, info),
-		val);
-	mutex_unlock(&indio_dev->mlock);
-
-	return ret;
-}
-
-static int ad799x_read_event_value(struct iio_dev *indio_dev,
-				    const struct iio_chan_spec *chan,
-				    enum iio_event_type type,
-				    enum iio_event_direction dir,
-				    enum iio_event_info info,
-				    int *val, int *val2)
-{
-	int ret;
-	struct ad799x_state *st = iio_priv(indio_dev);
-	u16 valin;
-
-	mutex_lock(&indio_dev->mlock);
-	ret = ad799x_i2c_read16(st, ad799x_threshold_reg(chan, dir, info),
-		&valin);
-	mutex_unlock(&indio_dev->mlock);
-	if (ret < 0)
-		return ret;
-	*val = valin;
-
-	return IIO_VAL_INT;
-}
-
-static irqreturn_t ad799x_event_handler(int irq, void *private)
-{
-	struct iio_dev *indio_dev = private;
-	struct ad799x_state *st = iio_priv(private);
-	u8 status;
-	int i, ret;
-
-	ret = ad799x_i2c_read8(st, AD7998_ALERT_STAT_REG, &status);
-	if (ret)
-		goto done;
-
-	if (!status)
-		goto done;
-
-	ad799x_i2c_write8(st, AD7998_ALERT_STAT_REG, AD7998_ALERT_STAT_CLEAR);
-
-	for (i = 0; i < 8; i++) {
-		if (status & (1 << i))
-			iio_push_event(indio_dev,
-				       i & 0x1 ?
-				       IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE,
-							    (i >> 1),
-							    IIO_EV_TYPE_THRESH,
-							    IIO_EV_DIR_RISING) :
-				       IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE,
-							    (i >> 1),
-							    IIO_EV_TYPE_THRESH,
-							    IIO_EV_DIR_FALLING),
-				       iio_get_time_ns());
-	}
-
-done:
-	return IRQ_HANDLED;
-}
-
-static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
-			      ad799x_read_frequency,
-			      ad799x_write_frequency);
-static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("15625 7812 3906 1953 976 488 244 0");
-
-static struct attribute *ad799x_event_attributes[] = {
-	&iio_dev_attr_sampling_frequency.dev_attr.attr,
-	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
-	NULL,
-};
-
-static struct attribute_group ad799x_event_attrs_group = {
-	.attrs = ad799x_event_attributes,
-	.name = "events",
-};
-
-static const struct iio_info ad7991_info = {
-	.read_raw = &ad799x_read_raw,
-	.driver_module = THIS_MODULE,
-};
-
-static const struct iio_info ad7993_4_7_8_info = {
-	.read_raw = &ad799x_read_raw,
-	.event_attrs = &ad799x_event_attrs_group,
-	.read_event_config = &ad799x_read_event_config,
-	.read_event_value = &ad799x_read_event_value,
-	.write_event_value = &ad799x_write_event_value,
-	.driver_module = THIS_MODULE,
-	.update_scan_mode = ad7997_8_update_scan_mode,
-};
-
-static const struct iio_event_spec ad799x_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 _AD799X_CHANNEL(_index, _realbits, _ev_spec, _num_ev_spec) { \
-	.type = IIO_VOLTAGE, \
-	.indexed = 1, \
-	.channel = (_index), \
-	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
-	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
-	.scan_index = (_index), \
-	.scan_type = { \
-		.sign = 'u', \
-		.realbits = (_realbits), \
-		.storagebits = 16, \
-		.shift = 12 - (_realbits), \
-		.endianness = IIO_BE, \
-	}, \
-	.event_spec = _ev_spec, \
-	.num_event_specs = _num_ev_spec, \
-}
-
-#define AD799X_CHANNEL(_index, _realbits) \
-	_AD799X_CHANNEL(_index, _realbits, NULL, 0)
-
-#define AD799X_CHANNEL_WITH_EVENTS(_index, _realbits) \
-	_AD799X_CHANNEL(_index, _realbits, ad799x_events, \
-		ARRAY_SIZE(ad799x_events))
-
-static const struct ad799x_chip_info ad799x_chip_info_tbl[] = {
-	[ad7991] = {
-		.channel = {
-			AD799X_CHANNEL(0, 12),
-			AD799X_CHANNEL(1, 12),
-			AD799X_CHANNEL(2, 12),
-			AD799X_CHANNEL(3, 12),
-			IIO_CHAN_SOFT_TIMESTAMP(4),
-		},
-		.num_channels = 5,
-		.info = &ad7991_info,
-	},
-	[ad7995] = {
-		.channel = {
-			AD799X_CHANNEL(0, 10),
-			AD799X_CHANNEL(1, 10),
-			AD799X_CHANNEL(2, 10),
-			AD799X_CHANNEL(3, 10),
-			IIO_CHAN_SOFT_TIMESTAMP(4),
-		},
-		.num_channels = 5,
-		.info = &ad7991_info,
-	},
-	[ad7999] = {
-		.channel = {
-			AD799X_CHANNEL(0, 8),
-			AD799X_CHANNEL(1, 8),
-			AD799X_CHANNEL(2, 8),
-			AD799X_CHANNEL(3, 8),
-			IIO_CHAN_SOFT_TIMESTAMP(4),
-		},
-		.num_channels = 5,
-		.info = &ad7991_info,
-	},
-	[ad7992] = {
-		.channel = {
-			AD799X_CHANNEL_WITH_EVENTS(0, 12),
-			AD799X_CHANNEL_WITH_EVENTS(1, 12),
-			IIO_CHAN_SOFT_TIMESTAMP(3),
-		},
-		.num_channels = 3,
-		.default_config = AD7998_ALERT_EN,
-		.info = &ad7993_4_7_8_info,
-	},
-	[ad7993] = {
-		.channel = {
-			AD799X_CHANNEL_WITH_EVENTS(0, 10),
-			AD799X_CHANNEL_WITH_EVENTS(1, 10),
-			AD799X_CHANNEL_WITH_EVENTS(2, 10),
-			AD799X_CHANNEL_WITH_EVENTS(3, 10),
-			IIO_CHAN_SOFT_TIMESTAMP(4),
-		},
-		.num_channels = 5,
-		.default_config = AD7998_ALERT_EN,
-		.info = &ad7993_4_7_8_info,
-	},
-	[ad7994] = {
-		.channel = {
-			AD799X_CHANNEL_WITH_EVENTS(0, 12),
-			AD799X_CHANNEL_WITH_EVENTS(1, 12),
-			AD799X_CHANNEL_WITH_EVENTS(2, 12),
-			AD799X_CHANNEL_WITH_EVENTS(3, 12),
-			IIO_CHAN_SOFT_TIMESTAMP(4),
-		},
-		.num_channels = 5,
-		.default_config = AD7998_ALERT_EN,
-		.info = &ad7993_4_7_8_info,
-	},
-	[ad7997] = {
-		.channel = {
-			AD799X_CHANNEL_WITH_EVENTS(0, 10),
-			AD799X_CHANNEL_WITH_EVENTS(1, 10),
-			AD799X_CHANNEL_WITH_EVENTS(2, 10),
-			AD799X_CHANNEL_WITH_EVENTS(3, 10),
-			AD799X_CHANNEL(4, 10),
-			AD799X_CHANNEL(5, 10),
-			AD799X_CHANNEL(6, 10),
-			AD799X_CHANNEL(7, 10),
-			IIO_CHAN_SOFT_TIMESTAMP(8),
-		},
-		.num_channels = 9,
-		.default_config = AD7998_ALERT_EN,
-		.info = &ad7993_4_7_8_info,
-	},
-	[ad7998] = {
-		.channel = {
-			AD799X_CHANNEL_WITH_EVENTS(0, 12),
-			AD799X_CHANNEL_WITH_EVENTS(1, 12),
-			AD799X_CHANNEL_WITH_EVENTS(2, 12),
-			AD799X_CHANNEL_WITH_EVENTS(3, 12),
-			AD799X_CHANNEL(4, 12),
-			AD799X_CHANNEL(5, 12),
-			AD799X_CHANNEL(6, 12),
-			AD799X_CHANNEL(7, 12),
-			IIO_CHAN_SOFT_TIMESTAMP(8),
-		},
-		.num_channels = 9,
-		.default_config = AD7998_ALERT_EN,
-		.info = &ad7993_4_7_8_info,
-	},
-};
-
-static int ad799x_probe(struct i2c_client *client,
-				   const struct i2c_device_id *id)
-{
-	int ret;
-	struct ad799x_state *st;
-	struct iio_dev *indio_dev;
-
-	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st));
-	if (indio_dev == NULL)
-		return -ENOMEM;
-
-	st = iio_priv(indio_dev);
-	/* this is only used for device removal purposes */
-	i2c_set_clientdata(client, indio_dev);
-
-	st->id = id->driver_data;
-	st->chip_info = &ad799x_chip_info_tbl[st->id];
-	st->config = st->chip_info->default_config;
-
-	/* TODO: Add pdata options for filtering and bit delay */
-
-	st->reg = devm_regulator_get(&client->dev, "vcc");
-	if (IS_ERR(st->reg))
-		return PTR_ERR(st->reg);
-	ret = regulator_enable(st->reg);
-	if (ret)
-		return ret;
-	st->vref = devm_regulator_get(&client->dev, "vref");
-	if (IS_ERR(st->vref)) {
-		ret = PTR_ERR(st->vref);
-		goto error_disable_reg;
-	}
-	ret = regulator_enable(st->vref);
-	if (ret)
-		goto error_disable_reg;
-
-	st->client = client;
-
-	indio_dev->dev.parent = &client->dev;
-	indio_dev->name = id->name;
-	indio_dev->info = st->chip_info->info;
-
-	indio_dev->modes = INDIO_DIRECT_MODE;
-	indio_dev->channels = st->chip_info->channel;
-	indio_dev->num_channels = st->chip_info->num_channels;
-
-	ret = iio_triggered_buffer_setup(indio_dev, NULL,
-		&ad799x_trigger_handler, NULL);
-	if (ret)
-		goto error_disable_reg;
-
-	if (client->irq > 0) {
-		ret = devm_request_threaded_irq(&client->dev,
-						client->irq,
-						NULL,
-						ad799x_event_handler,
-						IRQF_TRIGGER_FALLING |
-						IRQF_ONESHOT,
-						client->name,
-						indio_dev);
-		if (ret)
-			goto error_cleanup_ring;
-	}
-	ret = iio_device_register(indio_dev);
-	if (ret)
-		goto error_cleanup_ring;
-
-	return 0;
-
-error_cleanup_ring:
-	iio_triggered_buffer_cleanup(indio_dev);
-error_disable_reg:
-	if (!IS_ERR(st->vref))
-		regulator_disable(st->vref);
-	if (!IS_ERR(st->reg))
-		regulator_disable(st->reg);
-
-	return ret;
-}
-
-static int ad799x_remove(struct i2c_client *client)
-{
-	struct iio_dev *indio_dev = i2c_get_clientdata(client);
-	struct ad799x_state *st = iio_priv(indio_dev);
-
-	iio_device_unregister(indio_dev);
-
-	iio_triggered_buffer_cleanup(indio_dev);
-	if (!IS_ERR(st->vref))
-		regulator_disable(st->vref);
-	if (!IS_ERR(st->reg))
-		regulator_disable(st->reg);
-	kfree(st->rx_buf);
-
-	return 0;
-}
-
-static const struct i2c_device_id ad799x_id[] = {
-	{ "ad7991", ad7991 },
-	{ "ad7995", ad7995 },
-	{ "ad7999", ad7999 },
-	{ "ad7992", ad7992 },
-	{ "ad7993", ad7993 },
-	{ "ad7994", ad7994 },
-	{ "ad7997", ad7997 },
-	{ "ad7998", ad7998 },
-	{}
-};
-
-MODULE_DEVICE_TABLE(i2c, ad799x_id);
-
-static struct i2c_driver ad799x_driver = {
-	.driver = {
-		.name = "ad799x",
-	},
-	.probe = ad799x_probe,
-	.remove = ad799x_remove,
-	.id_table = ad799x_id,
-};
-module_i2c_driver(ad799x_driver);
-
-MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
-MODULE_DESCRIPTION("Analog Devices AD799x ADC");
-MODULE_LICENSE("GPL v2");