3 * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
5 * based on iio/adc/max1363
6 * Copyright (C) 2008-2010 Jonathan Cameron
8 * based on linux/drivers/i2c/chips/max123x
9 * Copyright (C) 2002-2004 Stefan Eletzhofer
11 * based on linux/drivers/acron/char/pcf8583.c
12 * Copyright (C) 2000 Russell King
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
20 * Support for ad7991, ad7995, ad7999, ad7992, ad7993, ad7994, ad7997,
21 * ad7998 and similar chips.
25 #include <linux/interrupt.h>
26 #include <linux/device.h>
27 #include <linux/kernel.h>
28 #include <linux/sysfs.h>
29 #include <linux/i2c.h>
30 #include <linux/regulator/consumer.h>
31 #include <linux/slab.h>
32 #include <linux/types.h>
33 #include <linux/err.h>
34 #include <linux/module.h>
35 #include <linux/bitops.h>
37 #include <linux/iio/iio.h>
38 #include <linux/iio/sysfs.h>
39 #include <linux/iio/events.h>
40 #include <linux/iio/buffer.h>
41 #include <linux/iio/trigger_consumer.h>
42 #include <linux/iio/triggered_buffer.h>
44 #define AD799X_CHANNEL_SHIFT 4
47 * AD7991, AD7995 and AD7999 defines
50 #define AD7991_REF_SEL 0x08
51 #define AD7991_FLTR 0x04
52 #define AD7991_BIT_TRIAL_DELAY 0x02
53 #define AD7991_SAMPLE_DELAY 0x01
56 * AD7992, AD7993, AD7994, AD7997 and AD7998 defines
59 #define AD7998_FLTR BIT(3)
60 #define AD7998_ALERT_EN BIT(2)
61 #define AD7998_BUSY_ALERT BIT(1)
62 #define AD7998_BUSY_ALERT_POL BIT(0)
64 #define AD7998_CONV_RES_REG 0x0
65 #define AD7998_ALERT_STAT_REG 0x1
66 #define AD7998_CONF_REG 0x2
67 #define AD7998_CYCLE_TMR_REG 0x3
69 #define AD7998_DATALOW_REG(x) ((x) * 3 + 0x4)
70 #define AD7998_DATAHIGH_REG(x) ((x) * 3 + 0x5)
71 #define AD7998_HYST_REG(x) ((x) * 3 + 0x6)
73 #define AD7998_CYC_MASK GENMASK(2, 0)
74 #define AD7998_CYC_DIS 0x0
75 #define AD7998_CYC_TCONF_32 0x1
76 #define AD7998_CYC_TCONF_64 0x2
77 #define AD7998_CYC_TCONF_128 0x3
78 #define AD7998_CYC_TCONF_256 0x4
79 #define AD7998_CYC_TCONF_512 0x5
80 #define AD7998_CYC_TCONF_1024 0x6
81 #define AD7998_CYC_TCONF_2048 0x7
83 #define AD7998_ALERT_STAT_CLEAR 0xFF
86 * AD7997 and AD7997 defines
89 #define AD7997_8_READ_SINGLE BIT(7)
90 #define AD7997_8_READ_SEQUENCE (BIT(6) | BIT(5) | BIT(4))
104 * struct ad799x_chip_config - chip specific information
105 * @channel: channel specification
106 * @default_config: device default configuration
107 * @info: pointer to iio_info struct
109 struct ad799x_chip_config {
110 const struct iio_chan_spec channel[9];
112 const struct iio_info *info;
116 * struct ad799x_chip_info - chip specific information
117 * @num_channels: number of channels
118 * @noirq_config: device configuration w/o IRQ
119 * @irq_config: device configuration w/IRQ
121 struct ad799x_chip_info {
123 const struct ad799x_chip_config noirq_config;
124 const struct ad799x_chip_config irq_config;
127 struct ad799x_state {
128 struct i2c_client *client;
129 const struct ad799x_chip_config *chip_config;
130 struct regulator *reg;
131 struct regulator *vref;
136 unsigned int transfer_size;
139 static int ad799x_write_config(struct ad799x_state *st, u16 val)
144 return i2c_smbus_write_word_swapped(st->client, AD7998_CONF_REG,
147 return i2c_smbus_write_byte_data(st->client, AD7998_CONF_REG,
152 static int ad799x_read_config(struct ad799x_state *st)
157 return i2c_smbus_read_word_swapped(st->client, AD7998_CONF_REG);
159 return i2c_smbus_read_byte_data(st->client, AD7998_CONF_REG);
164 * ad799x_trigger_handler() bh of trigger launched polling to ring buffer
166 * Currently there is no option in this driver to disable the saving of
167 * timestamps within the ring.
169 static irqreturn_t ad799x_trigger_handler(int irq, void *p)
171 struct iio_poll_func *pf = p;
172 struct iio_dev *indio_dev = pf->indio_dev;
173 struct ad799x_state *st = iio_priv(indio_dev);
182 (*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT);
187 cmd = (*indio_dev->active_scan_mask << AD799X_CHANNEL_SHIFT) |
192 cmd = AD7997_8_READ_SEQUENCE | AD7998_CONV_RES_REG;
198 b_sent = i2c_smbus_read_i2c_block_data(st->client,
199 cmd, st->transfer_size, st->rx_buf);
203 iio_push_to_buffers_with_timestamp(indio_dev, st->rx_buf,
206 iio_trigger_notify_done(indio_dev->trig);
211 static int ad799x_update_scan_mode(struct iio_dev *indio_dev,
212 const unsigned long *scan_mask)
214 struct ad799x_state *st = iio_priv(indio_dev);
217 st->rx_buf = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
221 st->transfer_size = bitmap_weight(scan_mask, indio_dev->masklength) * 2;
229 st->config &= ~(GENMASK(7, 0) << AD799X_CHANNEL_SHIFT);
230 st->config |= (*scan_mask << AD799X_CHANNEL_SHIFT);
231 return ad799x_write_config(st, st->config);
237 static int ad799x_scan_direct(struct ad799x_state *st, unsigned ch)
245 cmd = st->config | (BIT(ch) << AD799X_CHANNEL_SHIFT);
250 cmd = BIT(ch) << AD799X_CHANNEL_SHIFT;
254 cmd = (ch << AD799X_CHANNEL_SHIFT) | AD7997_8_READ_SINGLE;
260 return i2c_smbus_read_word_swapped(st->client, cmd);
263 static int ad799x_read_raw(struct iio_dev *indio_dev,
264 struct iio_chan_spec const *chan,
270 struct ad799x_state *st = iio_priv(indio_dev);
273 case IIO_CHAN_INFO_RAW:
274 mutex_lock(&indio_dev->mlock);
275 if (iio_buffer_enabled(indio_dev))
278 ret = ad799x_scan_direct(st, chan->scan_index);
279 mutex_unlock(&indio_dev->mlock);
283 *val = (ret >> chan->scan_type.shift) &
284 GENMASK(chan->scan_type.realbits - 1, 0);
286 case IIO_CHAN_INFO_SCALE:
287 ret = regulator_get_voltage(st->vref);
291 *val2 = chan->scan_type.realbits;
292 return IIO_VAL_FRACTIONAL_LOG2;
296 static const unsigned int ad7998_frequencies[] = {
297 [AD7998_CYC_DIS] = 0,
298 [AD7998_CYC_TCONF_32] = 15625,
299 [AD7998_CYC_TCONF_64] = 7812,
300 [AD7998_CYC_TCONF_128] = 3906,
301 [AD7998_CYC_TCONF_512] = 976,
302 [AD7998_CYC_TCONF_1024] = 488,
303 [AD7998_CYC_TCONF_2048] = 244,
306 static ssize_t ad799x_read_frequency(struct device *dev,
307 struct device_attribute *attr,
310 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
311 struct ad799x_state *st = iio_priv(indio_dev);
313 int ret = i2c_smbus_read_byte_data(st->client, AD7998_CYCLE_TMR_REG);
317 return sprintf(buf, "%u\n", ad7998_frequencies[ret & AD7998_CYC_MASK]);
320 static ssize_t ad799x_write_frequency(struct device *dev,
321 struct device_attribute *attr,
325 struct iio_dev *indio_dev = dev_to_iio_dev(dev);
326 struct ad799x_state *st = iio_priv(indio_dev);
331 ret = kstrtol(buf, 10, &val);
335 mutex_lock(&indio_dev->mlock);
336 ret = i2c_smbus_read_byte_data(st->client, AD7998_CYCLE_TMR_REG);
338 goto error_ret_mutex;
339 /* Wipe the bits clean */
340 ret &= ~AD7998_CYC_MASK;
342 for (i = 0; i < ARRAY_SIZE(ad7998_frequencies); i++)
343 if (val == ad7998_frequencies[i])
345 if (i == ARRAY_SIZE(ad7998_frequencies)) {
347 goto error_ret_mutex;
350 ret = i2c_smbus_write_byte_data(st->client, AD7998_CYCLE_TMR_REG,
353 goto error_ret_mutex;
357 mutex_unlock(&indio_dev->mlock);
362 static int ad799x_read_event_config(struct iio_dev *indio_dev,
363 const struct iio_chan_spec *chan,
364 enum iio_event_type type,
365 enum iio_event_direction dir)
367 struct ad799x_state *st = iio_priv(indio_dev);
369 if (!(st->config & AD7998_ALERT_EN))
372 if ((st->config >> AD799X_CHANNEL_SHIFT) & BIT(chan->scan_index))
378 static int ad799x_write_event_config(struct iio_dev *indio_dev,
379 const struct iio_chan_spec *chan,
380 enum iio_event_type type,
381 enum iio_event_direction dir,
384 struct ad799x_state *st = iio_priv(indio_dev);
387 mutex_lock(&indio_dev->mlock);
388 if (iio_buffer_enabled(indio_dev)) {
394 st->config |= BIT(chan->scan_index) << AD799X_CHANNEL_SHIFT;
396 st->config &= ~(BIT(chan->scan_index) << AD799X_CHANNEL_SHIFT);
398 if (st->config >> AD799X_CHANNEL_SHIFT)
399 st->config |= AD7998_ALERT_EN;
401 st->config &= ~AD7998_ALERT_EN;
403 ret = ad799x_write_config(st, st->config);
406 mutex_unlock(&indio_dev->mlock);
411 static unsigned int ad799x_threshold_reg(const struct iio_chan_spec *chan,
412 enum iio_event_direction dir,
413 enum iio_event_info info)
416 case IIO_EV_INFO_VALUE:
417 if (dir == IIO_EV_DIR_FALLING)
418 return AD7998_DATALOW_REG(chan->channel);
420 return AD7998_DATAHIGH_REG(chan->channel);
421 case IIO_EV_INFO_HYSTERESIS:
422 return AD7998_HYST_REG(chan->channel);
430 static int ad799x_write_event_value(struct iio_dev *indio_dev,
431 const struct iio_chan_spec *chan,
432 enum iio_event_type type,
433 enum iio_event_direction dir,
434 enum iio_event_info info,
438 struct ad799x_state *st = iio_priv(indio_dev);
440 if (val < 0 || val > GENMASK(chan->scan_type.realbits - 1, 0))
443 mutex_lock(&indio_dev->mlock);
444 ret = i2c_smbus_write_word_swapped(st->client,
445 ad799x_threshold_reg(chan, dir, info),
446 val << chan->scan_type.shift);
447 mutex_unlock(&indio_dev->mlock);
452 static int ad799x_read_event_value(struct iio_dev *indio_dev,
453 const struct iio_chan_spec *chan,
454 enum iio_event_type type,
455 enum iio_event_direction dir,
456 enum iio_event_info info,
460 struct ad799x_state *st = iio_priv(indio_dev);
462 mutex_lock(&indio_dev->mlock);
463 ret = i2c_smbus_read_word_swapped(st->client,
464 ad799x_threshold_reg(chan, dir, info));
465 mutex_unlock(&indio_dev->mlock);
468 *val = (ret >> chan->scan_type.shift) &
469 GENMASK(chan->scan_type.realbits - 1 , 0);
474 static irqreturn_t ad799x_event_handler(int irq, void *private)
476 struct iio_dev *indio_dev = private;
477 struct ad799x_state *st = iio_priv(private);
480 ret = i2c_smbus_read_byte_data(st->client, AD7998_ALERT_STAT_REG);
484 if (i2c_smbus_write_byte_data(st->client, AD7998_ALERT_STAT_REG,
485 AD7998_ALERT_STAT_CLEAR) < 0)
488 for (i = 0; i < 8; i++) {
490 iio_push_event(indio_dev,
492 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE,
496 IIO_UNMOD_EVENT_CODE(IIO_VOLTAGE,
507 static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
508 ad799x_read_frequency,
509 ad799x_write_frequency);
510 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("15625 7812 3906 1953 976 488 244 0");
512 static struct attribute *ad799x_event_attributes[] = {
513 &iio_dev_attr_sampling_frequency.dev_attr.attr,
514 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
518 static struct attribute_group ad799x_event_attrs_group = {
519 .attrs = ad799x_event_attributes,
523 static const struct iio_info ad7991_info = {
524 .read_raw = &ad799x_read_raw,
525 .driver_module = THIS_MODULE,
528 static const struct iio_info ad7993_4_7_8_noirq_info = {
529 .read_raw = &ad799x_read_raw,
530 .driver_module = THIS_MODULE,
531 .update_scan_mode = ad799x_update_scan_mode,
534 static const struct iio_info ad7993_4_7_8_irq_info = {
535 .read_raw = &ad799x_read_raw,
536 .event_attrs = &ad799x_event_attrs_group,
537 .read_event_config = &ad799x_read_event_config,
538 .write_event_config = &ad799x_write_event_config,
539 .read_event_value = &ad799x_read_event_value,
540 .write_event_value = &ad799x_write_event_value,
541 .driver_module = THIS_MODULE,
542 .update_scan_mode = ad799x_update_scan_mode,
545 static const struct iio_event_spec ad799x_events[] = {
547 .type = IIO_EV_TYPE_THRESH,
548 .dir = IIO_EV_DIR_RISING,
549 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
550 BIT(IIO_EV_INFO_ENABLE),
552 .type = IIO_EV_TYPE_THRESH,
553 .dir = IIO_EV_DIR_FALLING,
554 .mask_separate = BIT(IIO_EV_INFO_VALUE) |
555 BIT(IIO_EV_INFO_ENABLE),
557 .type = IIO_EV_TYPE_THRESH,
558 .dir = IIO_EV_DIR_EITHER,
559 .mask_separate = BIT(IIO_EV_INFO_HYSTERESIS),
563 #define _AD799X_CHANNEL(_index, _realbits, _ev_spec, _num_ev_spec) { \
564 .type = IIO_VOLTAGE, \
566 .channel = (_index), \
567 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
568 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
569 .scan_index = (_index), \
572 .realbits = (_realbits), \
574 .shift = 12 - (_realbits), \
575 .endianness = IIO_BE, \
577 .event_spec = _ev_spec, \
578 .num_event_specs = _num_ev_spec, \
581 #define AD799X_CHANNEL(_index, _realbits) \
582 _AD799X_CHANNEL(_index, _realbits, NULL, 0)
584 #define AD799X_CHANNEL_WITH_EVENTS(_index, _realbits) \
585 _AD799X_CHANNEL(_index, _realbits, ad799x_events, \
586 ARRAY_SIZE(ad799x_events))
588 static const struct ad799x_chip_info ad799x_chip_info_tbl[] = {
593 AD799X_CHANNEL(0, 12),
594 AD799X_CHANNEL(1, 12),
595 AD799X_CHANNEL(2, 12),
596 AD799X_CHANNEL(3, 12),
597 IIO_CHAN_SOFT_TIMESTAMP(4),
599 .info = &ad7991_info,
606 AD799X_CHANNEL(0, 10),
607 AD799X_CHANNEL(1, 10),
608 AD799X_CHANNEL(2, 10),
609 AD799X_CHANNEL(3, 10),
610 IIO_CHAN_SOFT_TIMESTAMP(4),
612 .info = &ad7991_info,
619 AD799X_CHANNEL(0, 8),
620 AD799X_CHANNEL(1, 8),
621 AD799X_CHANNEL(2, 8),
622 AD799X_CHANNEL(3, 8),
623 IIO_CHAN_SOFT_TIMESTAMP(4),
625 .info = &ad7991_info,
632 AD799X_CHANNEL(0, 12),
633 AD799X_CHANNEL(1, 12),
634 IIO_CHAN_SOFT_TIMESTAMP(3),
636 .info = &ad7993_4_7_8_noirq_info,
640 AD799X_CHANNEL_WITH_EVENTS(0, 12),
641 AD799X_CHANNEL_WITH_EVENTS(1, 12),
642 IIO_CHAN_SOFT_TIMESTAMP(3),
644 .default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT,
645 .info = &ad7993_4_7_8_irq_info,
652 AD799X_CHANNEL(0, 10),
653 AD799X_CHANNEL(1, 10),
654 AD799X_CHANNEL(2, 10),
655 AD799X_CHANNEL(3, 10),
656 IIO_CHAN_SOFT_TIMESTAMP(4),
658 .info = &ad7993_4_7_8_noirq_info,
662 AD799X_CHANNEL_WITH_EVENTS(0, 10),
663 AD799X_CHANNEL_WITH_EVENTS(1, 10),
664 AD799X_CHANNEL_WITH_EVENTS(2, 10),
665 AD799X_CHANNEL_WITH_EVENTS(3, 10),
666 IIO_CHAN_SOFT_TIMESTAMP(4),
668 .default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT,
669 .info = &ad7993_4_7_8_irq_info,
676 AD799X_CHANNEL(0, 12),
677 AD799X_CHANNEL(1, 12),
678 AD799X_CHANNEL(2, 12),
679 AD799X_CHANNEL(3, 12),
680 IIO_CHAN_SOFT_TIMESTAMP(4),
682 .info = &ad7993_4_7_8_noirq_info,
686 AD799X_CHANNEL_WITH_EVENTS(0, 12),
687 AD799X_CHANNEL_WITH_EVENTS(1, 12),
688 AD799X_CHANNEL_WITH_EVENTS(2, 12),
689 AD799X_CHANNEL_WITH_EVENTS(3, 12),
690 IIO_CHAN_SOFT_TIMESTAMP(4),
692 .default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT,
693 .info = &ad7993_4_7_8_irq_info,
700 AD799X_CHANNEL(0, 10),
701 AD799X_CHANNEL(1, 10),
702 AD799X_CHANNEL(2, 10),
703 AD799X_CHANNEL(3, 10),
704 AD799X_CHANNEL(4, 10),
705 AD799X_CHANNEL(5, 10),
706 AD799X_CHANNEL(6, 10),
707 AD799X_CHANNEL(7, 10),
708 IIO_CHAN_SOFT_TIMESTAMP(8),
710 .info = &ad7993_4_7_8_noirq_info,
714 AD799X_CHANNEL_WITH_EVENTS(0, 10),
715 AD799X_CHANNEL_WITH_EVENTS(1, 10),
716 AD799X_CHANNEL_WITH_EVENTS(2, 10),
717 AD799X_CHANNEL_WITH_EVENTS(3, 10),
718 AD799X_CHANNEL(4, 10),
719 AD799X_CHANNEL(5, 10),
720 AD799X_CHANNEL(6, 10),
721 AD799X_CHANNEL(7, 10),
722 IIO_CHAN_SOFT_TIMESTAMP(8),
724 .default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT,
725 .info = &ad7993_4_7_8_irq_info,
732 AD799X_CHANNEL(0, 12),
733 AD799X_CHANNEL(1, 12),
734 AD799X_CHANNEL(2, 12),
735 AD799X_CHANNEL(3, 12),
736 AD799X_CHANNEL(4, 12),
737 AD799X_CHANNEL(5, 12),
738 AD799X_CHANNEL(6, 12),
739 AD799X_CHANNEL(7, 12),
740 IIO_CHAN_SOFT_TIMESTAMP(8),
742 .info = &ad7993_4_7_8_noirq_info,
746 AD799X_CHANNEL_WITH_EVENTS(0, 12),
747 AD799X_CHANNEL_WITH_EVENTS(1, 12),
748 AD799X_CHANNEL_WITH_EVENTS(2, 12),
749 AD799X_CHANNEL_WITH_EVENTS(3, 12),
750 AD799X_CHANNEL(4, 12),
751 AD799X_CHANNEL(5, 12),
752 AD799X_CHANNEL(6, 12),
753 AD799X_CHANNEL(7, 12),
754 IIO_CHAN_SOFT_TIMESTAMP(8),
756 .default_config = AD7998_ALERT_EN | AD7998_BUSY_ALERT,
757 .info = &ad7993_4_7_8_irq_info,
762 static int ad799x_probe(struct i2c_client *client,
763 const struct i2c_device_id *id)
766 struct ad799x_state *st;
767 struct iio_dev *indio_dev;
768 const struct ad799x_chip_info *chip_info =
769 &ad799x_chip_info_tbl[id->driver_data];
771 indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*st));
772 if (indio_dev == NULL)
775 st = iio_priv(indio_dev);
776 /* this is only used for device removal purposes */
777 i2c_set_clientdata(client, indio_dev);
779 st->id = id->driver_data;
780 if (client->irq > 0 && chip_info->irq_config.info)
781 st->chip_config = &chip_info->irq_config;
783 st->chip_config = &chip_info->noirq_config;
785 /* TODO: Add pdata options for filtering and bit delay */
787 st->reg = devm_regulator_get(&client->dev, "vcc");
789 return PTR_ERR(st->reg);
790 ret = regulator_enable(st->reg);
793 st->vref = devm_regulator_get(&client->dev, "vref");
794 if (IS_ERR(st->vref)) {
795 ret = PTR_ERR(st->vref);
796 goto error_disable_reg;
798 ret = regulator_enable(st->vref);
800 goto error_disable_reg;
804 indio_dev->dev.parent = &client->dev;
805 indio_dev->name = id->name;
806 indio_dev->info = st->chip_config->info;
808 indio_dev->modes = INDIO_DIRECT_MODE;
809 indio_dev->channels = st->chip_config->channel;
810 indio_dev->num_channels = chip_info->num_channels;
812 ret = ad799x_write_config(st, st->chip_config->default_config);
814 goto error_disable_reg;
815 ret = ad799x_read_config(st);
817 goto error_disable_reg;
820 ret = iio_triggered_buffer_setup(indio_dev, NULL,
821 &ad799x_trigger_handler, NULL);
823 goto error_disable_vref;
825 if (client->irq > 0) {
826 ret = devm_request_threaded_irq(&client->dev,
829 ad799x_event_handler,
830 IRQF_TRIGGER_FALLING |
835 goto error_cleanup_ring;
837 ret = iio_device_register(indio_dev);
839 goto error_cleanup_ring;
844 iio_triggered_buffer_cleanup(indio_dev);
846 regulator_disable(st->vref);
848 regulator_disable(st->reg);
853 static int ad799x_remove(struct i2c_client *client)
855 struct iio_dev *indio_dev = i2c_get_clientdata(client);
856 struct ad799x_state *st = iio_priv(indio_dev);
858 iio_device_unregister(indio_dev);
860 iio_triggered_buffer_cleanup(indio_dev);
861 regulator_disable(st->vref);
862 regulator_disable(st->reg);
868 static const struct i2c_device_id ad799x_id[] = {
869 { "ad7991", ad7991 },
870 { "ad7995", ad7995 },
871 { "ad7999", ad7999 },
872 { "ad7992", ad7992 },
873 { "ad7993", ad7993 },
874 { "ad7994", ad7994 },
875 { "ad7997", ad7997 },
876 { "ad7998", ad7998 },
880 MODULE_DEVICE_TABLE(i2c, ad799x_id);
882 static struct i2c_driver ad799x_driver = {
886 .probe = ad799x_probe,
887 .remove = ad799x_remove,
888 .id_table = ad799x_id,
890 module_i2c_driver(ad799x_driver);
892 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
893 MODULE_DESCRIPTION("Analog Devices AD799x ADC");
894 MODULE_LICENSE("GPL v2");