3 * Copyright (C) 2010-1011 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>
38 #include "../buffer_generic.h"
43 * ad799x register access by I2C
45 static int ad799x_i2c_read16(struct ad799x_state *st, u8 reg, u16 *data)
47 struct i2c_client *client = st->client;
50 ret = i2c_smbus_read_word_data(client, reg);
52 dev_err(&client->dev, "I2C read error\n");
56 *data = swab16((u16)ret);
61 static int ad799x_i2c_read8(struct ad799x_state *st, u8 reg, u8 *data)
63 struct i2c_client *client = st->client;
66 ret = i2c_smbus_read_byte_data(client, reg);
68 dev_err(&client->dev, "I2C read error\n");
77 static int ad799x_i2c_write16(struct ad799x_state *st, u8 reg, u16 data)
79 struct i2c_client *client = st->client;
82 ret = i2c_smbus_write_word_data(client, reg, swab16(data));
84 dev_err(&client->dev, "I2C write error\n");
89 static int ad799x_i2c_write8(struct ad799x_state *st, u8 reg, u8 data)
91 struct i2c_client *client = st->client;
94 ret = i2c_smbus_write_byte_data(client, reg, data);
96 dev_err(&client->dev, "I2C write error\n");
101 int ad7997_8_set_scan_mode(struct ad799x_state *st, unsigned mask)
103 return ad799x_i2c_write16(st, AD7998_CONF_REG,
104 st->config | (mask << AD799X_CHANNEL_SHIFT));
107 static int ad799x_scan_direct(struct ad799x_state *st, unsigned ch)
117 cmd = st->config | ((1 << ch) << AD799X_CHANNEL_SHIFT);
122 cmd = (1 << ch) << AD799X_CHANNEL_SHIFT;
126 cmd = (ch << AD799X_CHANNEL_SHIFT) | AD7997_8_READ_SINGLE;
132 ret = ad799x_i2c_read16(st, cmd, &rxbuf);
139 static int ad799x_read_raw(struct iio_dev *dev_info,
140 struct iio_chan_spec const *chan,
146 struct ad799x_state *st = iio_priv(dev_info);
147 unsigned int scale_uv;
151 mutex_lock(&dev_info->mlock);
152 if (iio_ring_enabled(dev_info))
153 ret = ad799x_single_channel_from_ring(st,
156 ret = ad799x_scan_direct(st, chan->address);
157 mutex_unlock(&dev_info->mlock);
161 *val = (ret >> st->chip_info->channel[0].scan_type.shift) &
162 RES_MASK(st->chip_info->channel[0].scan_type.realbits);
164 case (1 << IIO_CHAN_INFO_SCALE_SHARED):
165 scale_uv = (st->int_vref_mv * 1000)
166 >> st->chip_info->channel[0].scan_type.realbits;
167 *val = scale_uv / 1000;
168 *val2 = (scale_uv % 1000) * 1000;
169 return IIO_VAL_INT_PLUS_MICRO;
174 static ssize_t ad799x_read_frequency(struct device *dev,
175 struct device_attribute *attr,
178 struct iio_dev *dev_info = dev_get_drvdata(dev);
179 struct ad799x_state *st = iio_priv(dev_info);
183 ret = ad799x_i2c_read8(st, AD7998_CYCLE_TMR_REG, &val);
187 val &= AD7998_CYC_MASK;
191 len = sprintf(buf, "0\n");
193 case AD7998_CYC_TCONF_32:
194 len = sprintf(buf, "15625\n");
196 case AD7998_CYC_TCONF_64:
197 len = sprintf(buf, "7812\n");
199 case AD7998_CYC_TCONF_128:
200 len = sprintf(buf, "3906\n");
202 case AD7998_CYC_TCONF_256:
203 len = sprintf(buf, "1953\n");
205 case AD7998_CYC_TCONF_512:
206 len = sprintf(buf, "976\n");
208 case AD7998_CYC_TCONF_1024:
209 len = sprintf(buf, "488\n");
211 case AD7998_CYC_TCONF_2048:
212 len = sprintf(buf, "244\n");
218 static ssize_t ad799x_write_frequency(struct device *dev,
219 struct device_attribute *attr,
223 struct iio_dev *dev_info = dev_get_drvdata(dev);
224 struct ad799x_state *st = iio_priv(dev_info);
230 ret = strict_strtol(buf, 10, &val);
234 mutex_lock(&dev_info->mlock);
235 ret = ad799x_i2c_read8(st, AD7998_CYCLE_TMR_REG, &t);
237 goto error_ret_mutex;
238 /* Wipe the bits clean */
239 t &= ~AD7998_CYC_MASK;
243 t |= AD7998_CYC_TCONF_32;
246 t |= AD7998_CYC_TCONF_64;
249 t |= AD7998_CYC_TCONF_128;
252 t |= AD7998_CYC_TCONF_256;
255 t |= AD7998_CYC_TCONF_512;
258 t |= AD7998_CYC_TCONF_1024;
261 t |= AD7998_CYC_TCONF_2048;
268 goto error_ret_mutex;
271 ret = ad799x_i2c_write8(st, AD7998_CYCLE_TMR_REG, t);
274 mutex_unlock(&dev_info->mlock);
276 return ret ? ret : len;
279 static ssize_t ad799x_read_channel_config(struct device *dev,
280 struct device_attribute *attr,
283 struct iio_dev *dev_info = dev_get_drvdata(dev);
284 struct ad799x_state *st = iio_priv(dev_info);
285 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
289 ret = ad799x_i2c_read16(st, this_attr->address, &val);
293 return sprintf(buf, "%d\n", val);
296 static ssize_t ad799x_write_channel_config(struct device *dev,
297 struct device_attribute *attr,
301 struct iio_dev *dev_info = dev_get_drvdata(dev);
302 struct ad799x_state *st = iio_priv(dev_info);
303 struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
308 ret = strict_strtol(buf, 10, &val);
312 mutex_lock(&dev_info->mlock);
313 ret = ad799x_i2c_write16(st, this_attr->address, val);
314 mutex_unlock(&dev_info->mlock);
316 return ret ? ret : len;
319 static irqreturn_t ad799x_event_handler(int irq, void *private)
321 struct iio_dev *indio_dev = private;
322 struct ad799x_state *st = iio_priv(private);
326 ret = ad799x_i2c_read8(st, AD7998_ALERT_STAT_REG, &status);
333 ad799x_i2c_write8(st, AD7998_ALERT_STAT_REG, AD7998_ALERT_STAT_CLEAR);
335 for (i = 0; i < 8; i++) {
336 if (status & (1 << i))
337 iio_push_event(indio_dev,
339 IIO_UNMOD_EVENT_CODE(IIO_IN,
343 IIO_UNMOD_EVENT_CODE(IIO_IN,
353 static IIO_DEVICE_ATTR(in_voltage0_thresh_low_value,
355 ad799x_read_channel_config,
356 ad799x_write_channel_config,
357 AD7998_DATALOW_CH1_REG);
359 static IIO_DEVICE_ATTR(in_voltage0_thresh_high_value,
361 ad799x_read_channel_config,
362 ad799x_write_channel_config,
363 AD7998_DATAHIGH_CH1_REG);
365 static IIO_DEVICE_ATTR(in_voltage0_thresh_both_hyst_raw,
367 ad799x_read_channel_config,
368 ad799x_write_channel_config,
369 AD7998_HYST_CH1_REG);
371 static IIO_DEVICE_ATTR(in_voltage1_thresh_low_value,
373 ad799x_read_channel_config,
374 ad799x_write_channel_config,
375 AD7998_DATALOW_CH2_REG);
377 static IIO_DEVICE_ATTR(in_voltage1_thresh_high_value,
379 ad799x_read_channel_config,
380 ad799x_write_channel_config,
381 AD7998_DATAHIGH_CH2_REG);
383 static IIO_DEVICE_ATTR(in_voltage1_thresh_both_hyst_raw,
385 ad799x_read_channel_config,
386 ad799x_write_channel_config,
387 AD7998_HYST_CH2_REG);
389 static IIO_DEVICE_ATTR(in_voltage2_thresh_low_value,
391 ad799x_read_channel_config,
392 ad799x_write_channel_config,
393 AD7998_DATALOW_CH3_REG);
395 static IIO_DEVICE_ATTR(in_voltage2_thresh_high_value,
397 ad799x_read_channel_config,
398 ad799x_write_channel_config,
399 AD7998_DATAHIGH_CH3_REG);
401 static IIO_DEVICE_ATTR(in_voltage2_thresh_both_hyst_raw,
403 ad799x_read_channel_config,
404 ad799x_write_channel_config,
405 AD7998_HYST_CH3_REG);
407 static IIO_DEVICE_ATTR(in_voltage3_thresh_low_value,
409 ad799x_read_channel_config,
410 ad799x_write_channel_config,
411 AD7998_DATALOW_CH4_REG);
413 static IIO_DEVICE_ATTR(in_voltage3_thresh_high_value,
415 ad799x_read_channel_config,
416 ad799x_write_channel_config,
417 AD7998_DATAHIGH_CH4_REG);
419 static IIO_DEVICE_ATTR(in_voltage3_thresh_both_hyst_raw,
421 ad799x_read_channel_config,
422 ad799x_write_channel_config,
423 AD7998_HYST_CH4_REG);
425 static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
426 ad799x_read_frequency,
427 ad799x_write_frequency);
428 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("15625 7812 3906 1953 976 488 244 0");
430 static struct attribute *ad7993_4_7_8_event_attributes[] = {
431 &iio_dev_attr_in_voltage0_thresh_low_value.dev_attr.attr,
432 &iio_dev_attr_in_voltage0_thresh_high_value.dev_attr.attr,
433 &iio_dev_attr_in_voltage0_thresh_both_hyst_raw.dev_attr.attr,
434 &iio_dev_attr_in_voltage1_thresh_low_value.dev_attr.attr,
435 &iio_dev_attr_in_voltage1_thresh_high_value.dev_attr.attr,
436 &iio_dev_attr_in_voltage1_thresh_both_hyst_raw.dev_attr.attr,
437 &iio_dev_attr_in_voltage2_thresh_low_value.dev_attr.attr,
438 &iio_dev_attr_in_voltage2_thresh_high_value.dev_attr.attr,
439 &iio_dev_attr_in_voltage2_thresh_both_hyst_raw.dev_attr.attr,
440 &iio_dev_attr_in_voltage3_thresh_low_value.dev_attr.attr,
441 &iio_dev_attr_in_voltage3_thresh_high_value.dev_attr.attr,
442 &iio_dev_attr_in_voltage3_thresh_both_hyst_raw.dev_attr.attr,
443 &iio_dev_attr_sampling_frequency.dev_attr.attr,
444 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
448 static struct attribute_group ad7993_4_7_8_event_attrs_group = {
449 .attrs = ad7993_4_7_8_event_attributes,
453 static struct attribute *ad7992_event_attributes[] = {
454 &iio_dev_attr_in_voltage0_thresh_low_value.dev_attr.attr,
455 &iio_dev_attr_in_voltage0_thresh_high_value.dev_attr.attr,
456 &iio_dev_attr_in_voltage0_thresh_both_hyst_raw.dev_attr.attr,
457 &iio_dev_attr_in_voltage1_thresh_low_value.dev_attr.attr,
458 &iio_dev_attr_in_voltage1_thresh_high_value.dev_attr.attr,
459 &iio_dev_attr_in_voltage1_thresh_both_hyst_raw.dev_attr.attr,
460 &iio_dev_attr_sampling_frequency.dev_attr.attr,
461 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
465 static struct attribute_group ad7992_event_attrs_group = {
466 .attrs = ad7992_event_attributes,
470 static const struct iio_info ad7991_info = {
471 .read_raw = &ad799x_read_raw,
472 .driver_module = THIS_MODULE,
475 static const struct iio_info ad7992_info = {
476 .read_raw = &ad799x_read_raw,
477 .event_attrs = &ad7992_event_attrs_group,
478 .driver_module = THIS_MODULE,
481 static const struct iio_info ad7993_4_7_8_info = {
482 .read_raw = &ad799x_read_raw,
483 .event_attrs = &ad7993_4_7_8_event_attrs_group,
484 .driver_module = THIS_MODULE,
487 static const struct ad799x_chip_info ad799x_chip_info_tbl[] = {
489 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
490 (1 << IIO_CHAN_INFO_SCALE_SHARED),
491 0, 0, IIO_ST('u', 12, 16, 0), 0),
492 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
493 (1 << IIO_CHAN_INFO_SCALE_SHARED),
494 1, 1, IIO_ST('u', 12, 16, 0), 0),
495 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
496 (1 << IIO_CHAN_INFO_SCALE_SHARED),
497 2, 2, IIO_ST('u', 12, 16, 0), 0),
498 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
499 (1 << IIO_CHAN_INFO_SCALE_SHARED),
500 3, 3, IIO_ST('u', 12, 16, 0), 0),
501 .channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
504 .info = &ad7991_info,
507 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
508 (1 << IIO_CHAN_INFO_SCALE_SHARED),
509 0, 0, IIO_ST('u', 10, 16, 0), 0),
510 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
511 (1 << IIO_CHAN_INFO_SCALE_SHARED),
512 1, 1, IIO_ST('u', 10, 16, 0), 0),
513 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
514 (1 << IIO_CHAN_INFO_SCALE_SHARED),
515 2, 2, IIO_ST('u', 10, 16, 0), 0),
516 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
517 (1 << IIO_CHAN_INFO_SCALE_SHARED),
518 3, 3, IIO_ST('u', 10, 16, 0), 0),
519 .channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
522 .info = &ad7991_info,
525 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
526 (1 << IIO_CHAN_INFO_SCALE_SHARED),
527 0, 0, IIO_ST('u', 10, 16, 0), 0),
528 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
529 (1 << IIO_CHAN_INFO_SCALE_SHARED),
530 1, 1, IIO_ST('u', 10, 16, 0), 0),
531 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
532 (1 << IIO_CHAN_INFO_SCALE_SHARED),
533 2, 2, IIO_ST('u', 10, 16, 0), 0),
534 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
535 (1 << IIO_CHAN_INFO_SCALE_SHARED),
536 3, 3, IIO_ST('u', 10, 16, 0), 0),
537 .channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
540 .info = &ad7991_info,
543 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
544 (1 << IIO_CHAN_INFO_SCALE_SHARED),
545 0, 0, IIO_ST('u', 12, 16, 0), 0),
546 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
547 (1 << IIO_CHAN_INFO_SCALE_SHARED),
548 1, 1, IIO_ST('u', 12, 16, 0), 0),
549 .channel[2] = IIO_CHAN_SOFT_TIMESTAMP(2),
552 .default_config = AD7998_ALERT_EN,
553 .info = &ad7992_info,
556 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
557 (1 << IIO_CHAN_INFO_SCALE_SHARED),
558 0, 0, IIO_ST('u', 10, 16, 0), 0),
559 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
560 (1 << IIO_CHAN_INFO_SCALE_SHARED),
561 1, 1, IIO_ST('u', 10, 16, 0), 0),
562 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
563 (1 << IIO_CHAN_INFO_SCALE_SHARED),
564 2, 2, IIO_ST('u', 10, 16, 0), 0),
565 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
566 (1 << IIO_CHAN_INFO_SCALE_SHARED),
567 3, 3, IIO_ST('u', 10, 16, 0), 0),
568 .channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
571 .default_config = AD7998_ALERT_EN,
572 .info = &ad7993_4_7_8_info,
575 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
576 (1 << IIO_CHAN_INFO_SCALE_SHARED),
577 0, 0, IIO_ST('u', 12, 16, 0), 0),
578 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
579 (1 << IIO_CHAN_INFO_SCALE_SHARED),
580 1, 1, IIO_ST('u', 12, 16, 0), 0),
581 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
582 (1 << IIO_CHAN_INFO_SCALE_SHARED),
583 2, 2, IIO_ST('u', 12, 16, 0), 0),
584 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
585 (1 << IIO_CHAN_INFO_SCALE_SHARED),
586 3, 3, IIO_ST('u', 12, 16, 0), 0),
587 .channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
590 .default_config = AD7998_ALERT_EN,
591 .info = &ad7993_4_7_8_info,
594 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
595 (1 << IIO_CHAN_INFO_SCALE_SHARED),
596 0, 0, IIO_ST('u', 10, 16, 0), 0),
597 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
598 (1 << IIO_CHAN_INFO_SCALE_SHARED),
599 1, 1, IIO_ST('u', 10, 16, 0), 0),
600 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
601 (1 << IIO_CHAN_INFO_SCALE_SHARED),
602 2, 2, IIO_ST('u', 10, 16, 0), 0),
603 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
604 (1 << IIO_CHAN_INFO_SCALE_SHARED),
605 3, 3, IIO_ST('u', 10, 16, 0), 0),
606 .channel[4] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 4, 0,
607 (1 << IIO_CHAN_INFO_SCALE_SHARED),
608 4, 4, IIO_ST('u', 10, 16, 0), 0),
609 .channel[5] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 5, 0,
610 (1 << IIO_CHAN_INFO_SCALE_SHARED),
611 5, 5, IIO_ST('u', 10, 16, 0), 0),
612 .channel[6] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 6, 0,
613 (1 << IIO_CHAN_INFO_SCALE_SHARED),
614 6, 6, IIO_ST('u', 10, 16, 0), 0),
615 .channel[7] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 7, 0,
616 (1 << IIO_CHAN_INFO_SCALE_SHARED),
617 7, 7, IIO_ST('u', 10, 16, 0), 0),
618 .channel[8] = IIO_CHAN_SOFT_TIMESTAMP(8),
621 .default_config = AD7998_ALERT_EN,
622 .info = &ad7993_4_7_8_info,
625 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
626 (1 << IIO_CHAN_INFO_SCALE_SHARED),
627 0, 0, IIO_ST('u', 12, 16, 0), 0),
628 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
629 (1 << IIO_CHAN_INFO_SCALE_SHARED),
630 1, 1, IIO_ST('u', 12, 16, 0), 0),
631 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
632 (1 << IIO_CHAN_INFO_SCALE_SHARED),
633 2, 2, IIO_ST('u', 12, 16, 0), 0),
634 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
635 (1 << IIO_CHAN_INFO_SCALE_SHARED),
636 3, 3, IIO_ST('u', 12, 16, 0), 0),
637 .channel[4] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 4, 0,
638 (1 << IIO_CHAN_INFO_SCALE_SHARED),
639 4, 4, IIO_ST('u', 12, 16, 0), 0),
640 .channel[5] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 5, 0,
641 (1 << IIO_CHAN_INFO_SCALE_SHARED),
642 5, 5, IIO_ST('u', 12, 16, 0), 0),
643 .channel[6] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 6, 0,
644 (1 << IIO_CHAN_INFO_SCALE_SHARED),
645 6, 6, IIO_ST('u', 12, 16, 0), 0),
646 .channel[7] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 7, 0,
647 (1 << IIO_CHAN_INFO_SCALE_SHARED),
648 7, 7, IIO_ST('u', 12, 16, 0), 0),
649 .channel[8] = IIO_CHAN_SOFT_TIMESTAMP(8),
652 .default_config = AD7998_ALERT_EN,
653 .info = &ad7993_4_7_8_info,
657 static int __devinit ad799x_probe(struct i2c_client *client,
658 const struct i2c_device_id *id)
661 struct ad799x_platform_data *pdata = client->dev.platform_data;
662 struct ad799x_state *st;
663 struct iio_dev *indio_dev = iio_allocate_device(sizeof(*st));
665 if (indio_dev == NULL)
668 st = iio_priv(indio_dev);
669 /* this is only used for device removal purposes */
670 i2c_set_clientdata(client, indio_dev);
672 st->id = id->driver_data;
673 st->chip_info = &ad799x_chip_info_tbl[st->id];
674 st->config = st->chip_info->default_config;
676 /* TODO: Add pdata options for filtering and bit delay */
679 st->int_vref_mv = pdata->vref_mv;
681 st->int_vref_mv = st->chip_info->int_vref_mv;
683 st->reg = regulator_get(&client->dev, "vcc");
684 if (!IS_ERR(st->reg)) {
685 ret = regulator_enable(st->reg);
691 indio_dev->dev.parent = &client->dev;
692 indio_dev->name = id->name;
693 indio_dev->info = st->chip_info->info;
694 indio_dev->name = id->name;
696 indio_dev->modes = INDIO_DIRECT_MODE;
697 indio_dev->channels = st->chip_info->channel;
698 indio_dev->num_channels = st->chip_info->num_channels;
700 ret = ad799x_register_ring_funcs_and_init(indio_dev);
702 goto error_disable_reg;
704 ret = iio_ring_buffer_register(indio_dev,
706 indio_dev->num_channels);
708 goto error_cleanup_ring;
710 if (client->irq > 0) {
711 ret = request_threaded_irq(client->irq,
713 ad799x_event_handler,
714 IRQF_TRIGGER_FALLING |
719 goto error_cleanup_ring;
721 ret = iio_device_register(indio_dev);
728 free_irq(client->irq, indio_dev);
730 ad799x_ring_cleanup(indio_dev);
732 if (!IS_ERR(st->reg))
733 regulator_disable(st->reg);
735 if (!IS_ERR(st->reg))
736 regulator_put(st->reg);
737 iio_free_device(indio_dev);
742 static __devexit int ad799x_remove(struct i2c_client *client)
744 struct iio_dev *indio_dev = i2c_get_clientdata(client);
745 struct ad799x_state *st = iio_priv(indio_dev);
748 free_irq(client->irq, indio_dev);
750 iio_ring_buffer_unregister(indio_dev);
751 ad799x_ring_cleanup(indio_dev);
752 if (!IS_ERR(st->reg)) {
753 regulator_disable(st->reg);
754 regulator_put(st->reg);
756 iio_device_unregister(indio_dev);
761 static const struct i2c_device_id ad799x_id[] = {
762 { "ad7991", ad7991 },
763 { "ad7995", ad7995 },
764 { "ad7999", ad7999 },
765 { "ad7992", ad7992 },
766 { "ad7993", ad7993 },
767 { "ad7994", ad7994 },
768 { "ad7997", ad7997 },
769 { "ad7998", ad7998 },
773 MODULE_DEVICE_TABLE(i2c, ad799x_id);
775 static struct i2c_driver ad799x_driver = {
779 .probe = ad799x_probe,
780 .remove = __devexit_p(ad799x_remove),
781 .id_table = ad799x_id,
784 static __init int ad799x_init(void)
786 return i2c_add_driver(&ad799x_driver);
789 static __exit void ad799x_exit(void)
791 i2c_del_driver(&ad799x_driver);
794 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
795 MODULE_DESCRIPTION("Analog Devices AD799x ADC");
796 MODULE_LICENSE("GPL v2");
797 MODULE_ALIAS("i2c:ad799x");
799 module_init(ad799x_init);
800 module_exit(ad799x_exit);