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>
38 #include "../ring_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 = dev_info->dev_data;
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_dev_get_devdata(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_dev_get_devdata(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_dev_get_devdata(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_dev_get_devdata(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_dev_get_devdata(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, 0,
339 IIO_EVENT_CODE_IN_HIGH_THRESH(i >> 1) :
340 IIO_EVENT_CODE_IN_LOW_THRESH(i >> 1),
347 static IIO_DEVICE_ATTR(in0_thresh_low_value,
349 ad799x_read_channel_config,
350 ad799x_write_channel_config,
351 AD7998_DATALOW_CH1_REG);
353 static IIO_DEVICE_ATTR(in0_thresh_high_value,
355 ad799x_read_channel_config,
356 ad799x_write_channel_config,
357 AD7998_DATAHIGH_CH1_REG);
359 static IIO_DEVICE_ATTR(in0_thresh_both_hyst_raw,
361 ad799x_read_channel_config,
362 ad799x_write_channel_config,
363 AD7998_HYST_CH1_REG);
365 static IIO_DEVICE_ATTR(in1_thresh_low_value,
367 ad799x_read_channel_config,
368 ad799x_write_channel_config,
369 AD7998_DATALOW_CH2_REG);
371 static IIO_DEVICE_ATTR(in1_thresh_high_value,
373 ad799x_read_channel_config,
374 ad799x_write_channel_config,
375 AD7998_DATAHIGH_CH2_REG);
377 static IIO_DEVICE_ATTR(in1_thresh_both_hyst_raw,
379 ad799x_read_channel_config,
380 ad799x_write_channel_config,
381 AD7998_HYST_CH2_REG);
383 static IIO_DEVICE_ATTR(in2_thresh_low_value,
385 ad799x_read_channel_config,
386 ad799x_write_channel_config,
387 AD7998_DATALOW_CH3_REG);
389 static IIO_DEVICE_ATTR(in2_thresh_high_value,
391 ad799x_read_channel_config,
392 ad799x_write_channel_config,
393 AD7998_DATAHIGH_CH3_REG);
395 static IIO_DEVICE_ATTR(in2_thresh_both_hyst_raw,
397 ad799x_read_channel_config,
398 ad799x_write_channel_config,
399 AD7998_HYST_CH3_REG);
401 static IIO_DEVICE_ATTR(in3_thresh_low_value,
403 ad799x_read_channel_config,
404 ad799x_write_channel_config,
405 AD7998_DATALOW_CH4_REG);
407 static IIO_DEVICE_ATTR(in3_thresh_high_value,
409 ad799x_read_channel_config,
410 ad799x_write_channel_config,
411 AD7998_DATAHIGH_CH4_REG);
413 static IIO_DEVICE_ATTR(in3_thresh_both_hyst_raw,
415 ad799x_read_channel_config,
416 ad799x_write_channel_config,
417 AD7998_HYST_CH4_REG);
419 static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
420 ad799x_read_frequency,
421 ad799x_write_frequency);
422 static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("15625 7812 3906 1953 976 488 244 0");
424 static struct attribute *ad7993_4_7_8_event_attributes[] = {
425 &iio_dev_attr_in0_thresh_low_value.dev_attr.attr,
426 &iio_dev_attr_in0_thresh_high_value.dev_attr.attr,
427 &iio_dev_attr_in0_thresh_both_hyst_raw.dev_attr.attr,
428 &iio_dev_attr_in1_thresh_low_value.dev_attr.attr,
429 &iio_dev_attr_in1_thresh_high_value.dev_attr.attr,
430 &iio_dev_attr_in1_thresh_both_hyst_raw.dev_attr.attr,
431 &iio_dev_attr_in2_thresh_low_value.dev_attr.attr,
432 &iio_dev_attr_in2_thresh_high_value.dev_attr.attr,
433 &iio_dev_attr_in2_thresh_both_hyst_raw.dev_attr.attr,
434 &iio_dev_attr_in3_thresh_low_value.dev_attr.attr,
435 &iio_dev_attr_in3_thresh_high_value.dev_attr.attr,
436 &iio_dev_attr_in3_thresh_both_hyst_raw.dev_attr.attr,
437 &iio_dev_attr_sampling_frequency.dev_attr.attr,
438 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
442 static struct attribute_group ad7993_4_7_8_event_attrs_group = {
443 .attrs = ad7993_4_7_8_event_attributes,
446 static struct attribute *ad7992_event_attributes[] = {
447 &iio_dev_attr_in0_thresh_low_value.dev_attr.attr,
448 &iio_dev_attr_in0_thresh_high_value.dev_attr.attr,
449 &iio_dev_attr_in0_thresh_both_hyst_raw.dev_attr.attr,
450 &iio_dev_attr_in1_thresh_low_value.dev_attr.attr,
451 &iio_dev_attr_in1_thresh_high_value.dev_attr.attr,
452 &iio_dev_attr_in1_thresh_both_hyst_raw.dev_attr.attr,
453 &iio_dev_attr_sampling_frequency.dev_attr.attr,
454 &iio_const_attr_sampling_frequency_available.dev_attr.attr,
458 static struct attribute_group ad7992_event_attrs_group = {
459 .attrs = ad7992_event_attributes,
462 static const struct iio_info ad7991_info = {
463 .read_raw = &ad799x_read_raw,
464 .driver_module = THIS_MODULE,
467 static const struct iio_info ad7992_info = {
468 .read_raw = &ad799x_read_raw,
469 .num_interrupt_lines = 1,
470 .event_attrs = &ad7992_event_attrs_group,
471 .driver_module = THIS_MODULE,
474 static const struct iio_info ad7993_4_7_8_info = {
475 .read_raw = &ad799x_read_raw,
476 .num_interrupt_lines = 1,
477 .event_attrs = &ad7993_4_7_8_event_attrs_group,
478 .driver_module = THIS_MODULE,
481 static const struct ad799x_chip_info ad799x_chip_info_tbl[] = {
483 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
484 (1 << IIO_CHAN_INFO_SCALE_SHARED),
485 0, 0, IIO_ST('u', 12, 16, 0), 0),
486 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
487 (1 << IIO_CHAN_INFO_SCALE_SHARED),
488 1, 1, IIO_ST('u', 12, 16, 0), 0),
489 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
490 (1 << IIO_CHAN_INFO_SCALE_SHARED),
491 2, 2, IIO_ST('u', 12, 16, 0), 0),
492 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
493 (1 << IIO_CHAN_INFO_SCALE_SHARED),
494 3, 3, IIO_ST('u', 12, 16, 0), 0),
495 .channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
498 .info = &ad7991_info,
501 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
502 (1 << IIO_CHAN_INFO_SCALE_SHARED),
503 0, 0, IIO_ST('u', 10, 16, 0), 0),
504 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
505 (1 << IIO_CHAN_INFO_SCALE_SHARED),
506 1, 1, IIO_ST('u', 10, 16, 0), 0),
507 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
508 (1 << IIO_CHAN_INFO_SCALE_SHARED),
509 2, 2, IIO_ST('u', 10, 16, 0), 0),
510 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
511 (1 << IIO_CHAN_INFO_SCALE_SHARED),
512 3, 3, IIO_ST('u', 10, 16, 0), 0),
513 .channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
516 .info = &ad7991_info,
519 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
520 (1 << IIO_CHAN_INFO_SCALE_SHARED),
521 0, 0, IIO_ST('u', 10, 16, 0), 0),
522 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
523 (1 << IIO_CHAN_INFO_SCALE_SHARED),
524 1, 1, IIO_ST('u', 10, 16, 0), 0),
525 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
526 (1 << IIO_CHAN_INFO_SCALE_SHARED),
527 2, 2, IIO_ST('u', 10, 16, 0), 0),
528 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
529 (1 << IIO_CHAN_INFO_SCALE_SHARED),
530 3, 3, IIO_ST('u', 10, 16, 0), 0),
531 .channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
534 .info = &ad7991_info,
537 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
538 (1 << IIO_CHAN_INFO_SCALE_SHARED),
539 0, 0, IIO_ST('u', 12, 16, 0), 0),
540 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
541 (1 << IIO_CHAN_INFO_SCALE_SHARED),
542 1, 1, IIO_ST('u', 12, 16, 0), 0),
543 .channel[2] = IIO_CHAN_SOFT_TIMESTAMP(2),
546 .default_config = AD7998_ALERT_EN,
547 .info = &ad7992_info,
550 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
551 (1 << IIO_CHAN_INFO_SCALE_SHARED),
552 0, 0, IIO_ST('u', 10, 16, 0), 0),
553 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
554 (1 << IIO_CHAN_INFO_SCALE_SHARED),
555 1, 1, IIO_ST('u', 10, 16, 0), 0),
556 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
557 (1 << IIO_CHAN_INFO_SCALE_SHARED),
558 2, 2, IIO_ST('u', 10, 16, 0), 0),
559 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
560 (1 << IIO_CHAN_INFO_SCALE_SHARED),
561 3, 3, IIO_ST('u', 10, 16, 0), 0),
562 .channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
565 .default_config = AD7998_ALERT_EN,
566 .info = &ad7993_4_7_8_info,
569 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
570 (1 << IIO_CHAN_INFO_SCALE_SHARED),
571 0, 0, IIO_ST('u', 12, 16, 0), 0),
572 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
573 (1 << IIO_CHAN_INFO_SCALE_SHARED),
574 1, 1, IIO_ST('u', 12, 16, 0), 0),
575 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
576 (1 << IIO_CHAN_INFO_SCALE_SHARED),
577 2, 2, IIO_ST('u', 12, 16, 0), 0),
578 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
579 (1 << IIO_CHAN_INFO_SCALE_SHARED),
580 3, 3, IIO_ST('u', 12, 16, 0), 0),
581 .channel[4] = IIO_CHAN_SOFT_TIMESTAMP(4),
584 .default_config = AD7998_ALERT_EN,
585 .info = &ad7993_4_7_8_info,
588 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
589 (1 << IIO_CHAN_INFO_SCALE_SHARED),
590 0, 0, IIO_ST('u', 10, 16, 0), 0),
591 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
592 (1 << IIO_CHAN_INFO_SCALE_SHARED),
593 1, 1, IIO_ST('u', 10, 16, 0), 0),
594 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
595 (1 << IIO_CHAN_INFO_SCALE_SHARED),
596 2, 2, IIO_ST('u', 10, 16, 0), 0),
597 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
598 (1 << IIO_CHAN_INFO_SCALE_SHARED),
599 3, 3, IIO_ST('u', 10, 16, 0), 0),
600 .channel[4] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 4, 0,
601 (1 << IIO_CHAN_INFO_SCALE_SHARED),
602 4, 4, IIO_ST('u', 10, 16, 0), 0),
603 .channel[5] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 5, 0,
604 (1 << IIO_CHAN_INFO_SCALE_SHARED),
605 5, 5, IIO_ST('u', 10, 16, 0), 0),
606 .channel[6] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 6, 0,
607 (1 << IIO_CHAN_INFO_SCALE_SHARED),
608 6, 6, IIO_ST('u', 10, 16, 0), 0),
609 .channel[7] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 7, 0,
610 (1 << IIO_CHAN_INFO_SCALE_SHARED),
611 7, 7, IIO_ST('u', 10, 16, 0), 0),
612 .channel[8] = IIO_CHAN_SOFT_TIMESTAMP(8),
615 .default_config = AD7998_ALERT_EN,
616 .info = &ad7993_4_7_8_info,
619 .channel[0] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 0, 0,
620 (1 << IIO_CHAN_INFO_SCALE_SHARED),
621 0, 0, IIO_ST('u', 12, 16, 0), 0),
622 .channel[1] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 1, 0,
623 (1 << IIO_CHAN_INFO_SCALE_SHARED),
624 1, 1, IIO_ST('u', 12, 16, 0), 0),
625 .channel[2] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 2, 0,
626 (1 << IIO_CHAN_INFO_SCALE_SHARED),
627 2, 2, IIO_ST('u', 12, 16, 0), 0),
628 .channel[3] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 3, 0,
629 (1 << IIO_CHAN_INFO_SCALE_SHARED),
630 3, 3, IIO_ST('u', 12, 16, 0), 0),
631 .channel[4] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 4, 0,
632 (1 << IIO_CHAN_INFO_SCALE_SHARED),
633 4, 4, IIO_ST('u', 12, 16, 0), 0),
634 .channel[5] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 5, 0,
635 (1 << IIO_CHAN_INFO_SCALE_SHARED),
636 5, 5, IIO_ST('u', 12, 16, 0), 0),
637 .channel[6] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 6, 0,
638 (1 << IIO_CHAN_INFO_SCALE_SHARED),
639 6, 6, IIO_ST('u', 12, 16, 0), 0),
640 .channel[7] = IIO_CHAN(IIO_IN, 0, 1, 0, NULL, 7, 0,
641 (1 << IIO_CHAN_INFO_SCALE_SHARED),
642 7, 7, IIO_ST('u', 12, 16, 0), 0),
643 .channel[8] = IIO_CHAN_SOFT_TIMESTAMP(8),
646 .default_config = AD7998_ALERT_EN,
647 .info = &ad7993_4_7_8_info,
651 static int __devinit ad799x_probe(struct i2c_client *client,
652 const struct i2c_device_id *id)
654 int ret, regdone = 0;
655 struct ad799x_platform_data *pdata = client->dev.platform_data;
656 struct ad799x_state *st;
657 struct iio_dev *indio_dev = iio_allocate_device(sizeof(*st));
659 if (indio_dev == NULL)
662 st = iio_priv(indio_dev);
663 /* this is only used for device removal purposes */
664 i2c_set_clientdata(client, indio_dev);
666 st->id = id->driver_data;
667 st->chip_info = &ad799x_chip_info_tbl[st->id];
668 st->config = st->chip_info->default_config;
670 /* TODO: Add pdata options for filtering and bit delay */
673 st->int_vref_mv = pdata->vref_mv;
675 st->int_vref_mv = st->chip_info->int_vref_mv;
677 st->reg = regulator_get(&client->dev, "vcc");
678 if (!IS_ERR(st->reg)) {
679 ret = regulator_enable(st->reg);
685 indio_dev->dev.parent = &client->dev;
686 indio_dev->name = id->name;
687 indio_dev->info = st->chip_info->info;
688 indio_dev->name = id->name;
689 indio_dev->dev_data = (void *)(st);
691 indio_dev->modes = INDIO_DIRECT_MODE;
692 indio_dev->channels = st->chip_info->channel;
693 indio_dev->num_channels = st->chip_info->num_channels;
695 ret = ad799x_register_ring_funcs_and_init(indio_dev);
697 goto error_disable_reg;
699 ret = iio_device_register(indio_dev);
701 goto error_cleanup_ring;
704 ret = iio_ring_buffer_register_ex(indio_dev->ring, 0,
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;
725 ad799x_ring_cleanup(indio_dev);
727 if (!IS_ERR(st->reg))
728 regulator_disable(st->reg);
730 if (!IS_ERR(st->reg))
731 regulator_put(st->reg);
733 iio_device_unregister(indio_dev);
735 iio_free_device(indio_dev);
740 static __devexit int ad799x_remove(struct i2c_client *client)
742 struct iio_dev *indio_dev = i2c_get_clientdata(client);
743 struct ad799x_state *st = iio_priv(indio_dev);
746 free_irq(client->irq, indio_dev);
748 iio_ring_buffer_unregister(indio_dev->ring);
749 ad799x_ring_cleanup(indio_dev);
750 if (!IS_ERR(st->reg)) {
751 regulator_disable(st->reg);
752 regulator_put(st->reg);
754 iio_device_unregister(indio_dev);
759 static const struct i2c_device_id ad799x_id[] = {
760 { "ad7991", ad7991 },
761 { "ad7995", ad7995 },
762 { "ad7999", ad7999 },
763 { "ad7992", ad7992 },
764 { "ad7993", ad7993 },
765 { "ad7994", ad7994 },
766 { "ad7997", ad7997 },
767 { "ad7998", ad7998 },
771 MODULE_DEVICE_TABLE(i2c, ad799x_id);
773 static struct i2c_driver ad799x_driver = {
777 .probe = ad799x_probe,
778 .remove = __devexit_p(ad799x_remove),
779 .id_table = ad799x_id,
782 static __init int ad799x_init(void)
784 return i2c_add_driver(&ad799x_driver);
787 static __exit void ad799x_exit(void)
789 i2c_del_driver(&ad799x_driver);
792 MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
793 MODULE_DESCRIPTION("Analog Devices AD799x ADC");
794 MODULE_LICENSE("GPL v2");
795 MODULE_ALIAS("i2c:ad799x");
797 module_init(ad799x_init);
798 module_exit(ad799x_exit);