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Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards

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orangepi/linux-orangepi-5.10.y.git/trunk/drivers/iio/adc/ad799x.c
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// SPDX-License-Identifier: GPL-2.0-only
/*
 * 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
 *
 * 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/bitops.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
 
/*
 * 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				BIT(3)
#define AD7998_ALERT_EN				BIT(2)
#define AD7998_BUSY_ALERT			BIT(1)
#define AD7998_BUSY_ALERT_POL			BIT(0)
 
#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				GENMASK(2, 0)
#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			BIT(7)
#define AD7997_8_READ_SEQUENCE			(BIT(6) | BIT(5) | BIT(4))
 
enum {
<------>ad7991,
<------>ad7995,
<------>ad7999,
<------>ad7992,
<------>ad7993,
<------>ad7994,
<------>ad7997,
<------>ad7998
};
 
/**
 * struct ad799x_chip_config - chip specific information
 * @channel:		channel specification
 * @default_config:	device default configuration
 * @info:		pointer to iio_info struct
 */
struct ad799x_chip_config {
<------>const struct iio_chan_spec	channel[9];
<------>u16				default_config;
<------>const struct iio_info		*info;
};
 
/**
 * struct ad799x_chip_info - chip specific information
 * @num_channels:	number of channels
 * @noirq_config:	device configuration w/o IRQ
 * @irq_config:		device configuration w/IRQ
 */
struct ad799x_chip_info {
<------>int				num_channels;
<------>const struct ad799x_chip_config	noirq_config;
<------>const struct ad799x_chip_config	irq_config;
};
 
struct ad799x_state {
<------>struct i2c_client		*client;
<------>const struct ad799x_chip_config	*chip_config;
<------>struct regulator		*reg;
<------>struct regulator		*vref;
<------>unsigned			id;
<------>u16				config;
 
<------>u8				*rx_buf;
<------>unsigned int			transfer_size;
};
 
static int ad799x_write_config(struct ad799x_state *st, u16 val)
{
<------>switch (st->id) {
<------>case ad7997:
<------>case ad7998:
<------><------>return i2c_smbus_write_word_swapped(st->client, AD7998_CONF_REG,
<------><------><------>val);
<------>case ad7992:
<------>case ad7993:
<------>case ad7994:
<------><------>return i2c_smbus_write_byte_data(st->client, AD7998_CONF_REG,
<------><------><------>val);
<------>default:
<------><------>/* Will be written when doing a conversion */
<------><------>st->config = val;
<------><------>return 0;
<------>}
}
 
static int ad799x_read_config(struct ad799x_state *st)
{
<------>switch (st->id) {
<------>case ad7997:
<------>case ad7998:
<------><------>return i2c_smbus_read_word_swapped(st->client, AD7998_CONF_REG);
<------>case ad7992:
<------>case ad7993:
<------>case ad7994:
<------><------>return i2c_smbus_read_byte_data(st->client, AD7998_CONF_REG);
<------>default:
<------><------>/* No readback support */
<------><------>return st->config;
<------>}
}
 
static int ad799x_update_config(struct ad799x_state *st, u16 config)
{
<------>int ret;
 
<------>ret = ad799x_write_config(st, config);
<------>if (ret < 0)
<------><------>return ret;
<------>ret = ad799x_read_config(st);
<------>if (ret < 0)
<------><------>return ret;
<------>st->config = ret;
 
<------>return 0;
}
 
/*
 * 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(indio_dev));
out:
<------>iio_trigger_notify_done(indio_dev->trig);
 
<------>return IRQ_HANDLED;
}
 
static int ad799x_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 ad7992:
<------>case ad7993:
<------>case ad7994:
<------>case ad7997:
<------>case ad7998:
<------><------>st->config &= ~(GENMASK(7, 0) << AD799X_CHANNEL_SHIFT);
<------><------>st->config |= (*scan_mask << AD799X_CHANNEL_SHIFT);
<------><------>return ad799x_write_config(st, st->config);
<------>default:
<------><------>return 0;
<------>}
}
 
static int ad799x_scan_direct(struct ad799x_state *st, unsigned ch)
{
<------>u8 cmd;
 
<------>switch (st->id) {
<------>case ad7991:
<------>case ad7995:
<------>case ad7999:
<------><------>cmd = st->config | (BIT(ch) << AD799X_CHANNEL_SHIFT);
<------><------>break;
<------>case ad7992:
<------>case ad7993:
<------>case ad7994:
<------><------>cmd = BIT(ch) << AD799X_CHANNEL_SHIFT;
<------><------>break;
<------>case ad7997:
<------>case ad7998:
<------><------>cmd = (ch << AD799X_CHANNEL_SHIFT) | AD7997_8_READ_SINGLE;
<------><------>break;
<------>default:
<------><------>return -EINVAL;
<------>}
 
<------>return i2c_smbus_read_word_swapped(st->client, cmd);
}
 
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:
<------><------>ret = iio_device_claim_direct_mode(indio_dev);
<------><------>if (ret)
<------><------><------>return ret;
<------><------>ret = ad799x_scan_direct(st, chan->scan_index);
<------><------>iio_device_release_direct_mode(indio_dev);
 
<------><------>if (ret < 0)
<------><------><------>return ret;
<------><------>*val = (ret >> chan->scan_type.shift) &
<------><------><------>GENMASK(chan->scan_type.realbits - 1, 0);
<------><------>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 = i2c_smbus_read_byte_data(st->client, AD7998_CYCLE_TMR_REG);
<------>if (ret < 0)
<------><------>return ret;
 
<------>return sprintf(buf, "%u\n", ad7998_frequencies[ret & AD7998_CYC_MASK]);
}
 
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;
 
<------>ret = kstrtol(buf, 10, &val);
<------>if (ret)
<------><------>return ret;
 
<------>mutex_lock(&indio_dev->mlock);
<------>ret = i2c_smbus_read_byte_data(st->client, AD7998_CYCLE_TMR_REG);
<------>if (ret < 0)
<------><------>goto error_ret_mutex;
<------>/* Wipe the bits clean */
<------>ret &= ~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;
<------>}
 
<------>ret = i2c_smbus_write_byte_data(st->client, AD7998_CYCLE_TMR_REG,
<------><------>ret | i);
<------>if (ret < 0)
<------><------>goto error_ret_mutex;
<------>ret = len;
 
error_ret_mutex:
<------>mutex_unlock(&indio_dev->mlock);
 
<------>return ret;
}
 
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)
{
<------>struct ad799x_state *st = iio_priv(indio_dev);
 
<------>if (!(st->config & AD7998_ALERT_EN))
<------><------>return 0;
 
<------>if ((st->config >> AD799X_CHANNEL_SHIFT) & BIT(chan->scan_index))
<------><------>return 1;
 
<------>return 0;
}
 
static int ad799x_write_event_config(struct iio_dev *indio_dev,
<------><------><------><------>     const struct iio_chan_spec *chan,
<------><------><------><------>     enum iio_event_type type,
<------><------><------><------>     enum iio_event_direction dir,
<------><------><------><------>     int state)
{
<------>struct ad799x_state *st = iio_priv(indio_dev);
<------>int ret;
 
<------>ret = iio_device_claim_direct_mode(indio_dev);
<------>if (ret)
<------><------>return ret;
 
<------>if (state)
<------><------>st->config |= BIT(chan->scan_index) << AD799X_CHANNEL_SHIFT;
<------>else
<------><------>st->config &= ~(BIT(chan->scan_index) << AD799X_CHANNEL_SHIFT);
 
<------>if (st->config >> AD799X_CHANNEL_SHIFT)
<------><------>st->config |= AD7998_ALERT_EN;
<------>else
<------><------>st->config &= ~AD7998_ALERT_EN;
 
<------>ret = ad799x_write_config(st, st->config);
<------>iio_device_release_direct_mode(indio_dev);
<------>return ret;
}
 
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);
 
<------>if (val < 0 || val > GENMASK(chan->scan_type.realbits - 1, 0))
<------><------>return -EINVAL;
 
<------>mutex_lock(&indio_dev->mlock);
<------>ret = i2c_smbus_write_word_swapped(st->client,
<------><------>ad799x_threshold_reg(chan, dir, info),
<------><------>val << chan->scan_type.shift);
<------>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);
 
<------>mutex_lock(&indio_dev->mlock);
<------>ret = i2c_smbus_read_word_swapped(st->client,
<------><------>ad799x_threshold_reg(chan, dir, info));
<------>mutex_unlock(&indio_dev->mlock);
<------>if (ret < 0)
<------><------>return ret;
<------>*val = (ret >> chan->scan_type.shift) &
<------><------>GENMASK(chan->scan_type.realbits - 1, 0);
 
<------>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);
<------>int i, ret;
 
<------>ret = i2c_smbus_read_byte_data(st->client, AD7998_ALERT_STAT_REG);
<------>if (ret <= 0)
<------><------>goto done;
 
<------>if (i2c_smbus_write_byte_data(st->client, AD7998_ALERT_STAT_REG,
<------><------>AD7998_ALERT_STAT_CLEAR) < 0)
<------><------>goto done;
 
<------>for (i = 0; i < 8; i++) {
<------><------>if (ret & BIT(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(indio_dev));
<------>}
 
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 const struct attribute_group ad799x_event_attrs_group = {
<------>.attrs = ad799x_event_attributes,
};
 
static const struct iio_info ad7991_info = {
<------>.read_raw = &ad799x_read_raw,
<------>.update_scan_mode = ad799x_update_scan_mode,
};
 
static const struct iio_info ad7993_4_7_8_noirq_info = {
<------>.read_raw = &ad799x_read_raw,
<------>.update_scan_mode = ad799x_update_scan_mode,
};
 
static const struct iio_info ad7993_4_7_8_irq_info = {
<------>.read_raw = &ad799x_read_raw,
<------>.event_attrs = &ad799x_event_attrs_group,
<------>.read_event_config = &ad799x_read_event_config,
<------>.write_event_config = &ad799x_write_event_config,
<------>.read_event_value = &ad799x_read_event_value,
<------>.write_event_value = &ad799x_write_event_value,
<------>.update_scan_mode = ad799x_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] = {
<------><------>.num_channels = 5,
<------><------>.noirq_config = {
<------><------><------>.channel = {
<------><------><------><------>AD799X_CHANNEL(0, 12),
<------><------><------><------>AD799X_CHANNEL(1, 12),
<------><------><------><------>AD799X_CHANNEL(2, 12),
<------><------><------><------>AD799X_CHANNEL(3, 12),
<------><------><------><------>IIO_CHAN_SOFT_TIMESTAMP(4),
<------><------><------>},
<------><------><------>.info = &ad7991_info,
<------><------>},
<------>},
<------>[ad7995] = {
<------><------>.num_channels = 5,
<------><------>.noirq_config = {
<------><------><------>.channel = {
<------><------><------><------>AD799X_CHANNEL(0, 10),
<------><------><------><------>AD799X_CHANNEL(1, 10),
<------><------><------><------>AD799X_CHANNEL(2, 10),
<------><------><------><------>AD799X_CHANNEL(3, 10),
<------><------><------><------>IIO_CHAN_SOFT_TIMESTAMP(4),
<------><------><------>},
<------><------><------>.info = &ad7991_info,
<------><------>},
<------>},
<------>[ad7999] = {
<------><------>.num_channels = 5,
<------><------>.noirq_config = {
<------><------><------>.channel = {
<------><------><------><------>AD799X_CHANNEL(0, 8),
<------><------><------><------>AD799X_CHANNEL(1, 8),
<------><------><------><------>AD799X_CHANNEL(2, 8),
<------><------><------><------>AD799X_CHANNEL(3, 8),
<------><------><------><------>IIO_CHAN_SOFT_TIMESTAMP(4),
<------><------><------>},
<------><------><------>.info = &ad7991_info,
<------><------>},
<------>},
<------>[ad7992] = {
<------><------>.num_channels = 3,
<------><------>.noirq_config = {
<------><------><------>.channel = {
<------><------><------><------>AD799X_CHANNEL(0, 12),
<------><------><------><------>AD799X_CHANNEL(1, 12),
<------><------><------><------>IIO_CHAN_SOFT_TIMESTAMP(3),
<------><------><------>},
<------><------><------>.info = &ad7993_4_7_8_noirq_info,
<------><------>},
<------><------>.irq_config = {
<------><------><------>.channel = {
<------><------><------><------>AD799X_CHANNEL_WITH_EVENTS(0, 12),
<------><------><------><------>AD799X_CHANNEL_WITH_EVENTS(1, 12),
<------><------><------><------>IIO_CHAN_SOFT_TIMESTAMP(3),
<------><------><------>},
<------><------><------>.default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT,
<------><------><------>.info = &ad7993_4_7_8_irq_info,
<------><------>},
<------>},
<------>[ad7993] = {
<------><------>.num_channels = 5,
<------><------>.noirq_config = {
<------><------><------>.channel = {
<------><------><------><------>AD799X_CHANNEL(0, 10),
<------><------><------><------>AD799X_CHANNEL(1, 10),
<------><------><------><------>AD799X_CHANNEL(2, 10),
<------><------><------><------>AD799X_CHANNEL(3, 10),
<------><------><------><------>IIO_CHAN_SOFT_TIMESTAMP(4),
<------><------><------>},
<------><------><------>.info = &ad7993_4_7_8_noirq_info,
<------><------>},
<------><------>.irq_config = {
<------><------><------>.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),
<------><------><------>},
<------><------><------>.default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT,
<------><------><------>.info = &ad7993_4_7_8_irq_info,
<------><------>},
<------>},
<------>[ad7994] = {
<------><------>.num_channels = 5,
<------><------>.noirq_config = {
<------><------><------>.channel = {
<------><------><------><------>AD799X_CHANNEL(0, 12),
<------><------><------><------>AD799X_CHANNEL(1, 12),
<------><------><------><------>AD799X_CHANNEL(2, 12),
<------><------><------><------>AD799X_CHANNEL(3, 12),
<------><------><------><------>IIO_CHAN_SOFT_TIMESTAMP(4),
<------><------><------>},
<------><------><------>.info = &ad7993_4_7_8_noirq_info,
<------><------>},
<------><------>.irq_config = {
<------><------><------>.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),
<------><------><------>},
<------><------><------>.default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT,
<------><------><------>.info = &ad7993_4_7_8_irq_info,
<------><------>},
<------>},
<------>[ad7997] = {
<------><------>.num_channels = 9,
<------><------>.noirq_config = {
<------><------><------>.channel = {
<------><------><------><------>AD799X_CHANNEL(0, 10),
<------><------><------><------>AD799X_CHANNEL(1, 10),
<------><------><------><------>AD799X_CHANNEL(2, 10),
<------><------><------><------>AD799X_CHANNEL(3, 10),
<------><------><------><------>AD799X_CHANNEL(4, 10),
<------><------><------><------>AD799X_CHANNEL(5, 10),
<------><------><------><------>AD799X_CHANNEL(6, 10),
<------><------><------><------>AD799X_CHANNEL(7, 10),
<------><------><------><------>IIO_CHAN_SOFT_TIMESTAMP(8),
<------><------><------>},
<------><------><------>.info = &ad7993_4_7_8_noirq_info,
<------><------>},
<------><------>.irq_config = {
<------><------><------>.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),
<------><------><------>},
<------><------><------>.default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT,
<------><------><------>.info = &ad7993_4_7_8_irq_info,
<------><------>},
<------>},
<------>[ad7998] = {
<------><------>.num_channels = 9,
<------><------>.noirq_config = {
<------><------><------>.channel = {
<------><------><------><------>AD799X_CHANNEL(0, 12),
<------><------><------><------>AD799X_CHANNEL(1, 12),
<------><------><------><------>AD799X_CHANNEL(2, 12),
<------><------><------><------>AD799X_CHANNEL(3, 12),
<------><------><------><------>AD799X_CHANNEL(4, 12),
<------><------><------><------>AD799X_CHANNEL(5, 12),
<------><------><------><------>AD799X_CHANNEL(6, 12),
<------><------><------><------>AD799X_CHANNEL(7, 12),
<------><------><------><------>IIO_CHAN_SOFT_TIMESTAMP(8),
<------><------><------>},
<------><------><------>.info = &ad7993_4_7_8_noirq_info,
<------><------>},
<------><------>.irq_config = {
<------><------><------>.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),
<------><------><------>},
<------><------><------>.default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT,
<------><------><------>.info = &ad7993_4_7_8_irq_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;
<------>const struct ad799x_chip_info *chip_info =
<------><------>&ad799x_chip_info_tbl[id->driver_data];
 
<------>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;
<------>if (client->irq > 0 && chip_info->irq_config.info)
<------><------>st->chip_config = &chip_info->irq_config;
<------>else
<------><------>st->chip_config = &chip_info->noirq_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->name = id->name;
<------>indio_dev->info = st->chip_config->info;
 
<------>indio_dev->modes = INDIO_DIRECT_MODE;
<------>indio_dev->channels = st->chip_config->channel;
<------>indio_dev->num_channels = chip_info->num_channels;
 
<------>ret = ad799x_update_config(st, st->chip_config->default_config);
<------>if (ret)
<------><------>goto error_disable_vref;
 
<------>ret = iio_triggered_buffer_setup(indio_dev, NULL,
<------><------>&ad799x_trigger_handler, NULL);
<------>if (ret)
<------><------>goto error_disable_vref;
 
<------>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_vref:
<------>regulator_disable(st->vref);
error_disable_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);
<------>regulator_disable(st->vref);
<------>regulator_disable(st->reg);
<------>kfree(st->rx_buf);
 
<------>return 0;
}
 
static int __maybe_unused ad799x_suspend(struct device *dev)
{
<------>struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
<------>struct ad799x_state *st = iio_priv(indio_dev);
 
<------>regulator_disable(st->vref);
<------>regulator_disable(st->reg);
 
<------>return 0;
}
 
static int __maybe_unused ad799x_resume(struct device *dev)
{
<------>struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
<------>struct ad799x_state *st = iio_priv(indio_dev);
<------>int ret;
 
<------>ret = regulator_enable(st->reg);
<------>if (ret) {
<------><------>dev_err(dev, "Unable to enable vcc regulator\n");
<------><------>return ret;
<------>}
<------>ret = regulator_enable(st->vref);
<------>if (ret) {
<------><------>regulator_disable(st->reg);
<------><------>dev_err(dev, "Unable to enable vref regulator\n");
<------><------>return ret;
<------>}
 
<------>/* resync config */
<------>ret = ad799x_update_config(st, st->config);
<------>if (ret) {
<------><------>regulator_disable(st->vref);
<------><------>regulator_disable(st->reg);
<------><------>return ret;
<------>}
 
<------>return 0;
}
 
static SIMPLE_DEV_PM_OPS(ad799x_pm_ops, ad799x_suspend, ad799x_resume);
 
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",
<------><------>.pm = &ad799x_pm_ops,
<------>},
<------>.probe = ad799x_probe,
<------>.remove = ad799x_remove,
<------>.id_table = ad799x_id,
};
module_i2c_driver(ad799x_driver);
 
MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
MODULE_DESCRIPTION("Analog Devices AD799x ADC");
MODULE_LICENSE("GPL v2");
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