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IIO: Move core headers to include/linux/iio
[deliverable/linux.git] / drivers / staging / iio / adc / ad7606_core.c
CommitLineData
b9618c0c
MH		 1/*
2 * AD7606 SPI ADC driver
3 *
4 * Copyright 2011 Analog Devices Inc.
5 *
6 * Licensed under the GPL-2.
7 */
8
9#include <linux/interrupt.h>
b9618c0c
MH		 10#include <linux/device.h>
11#include <linux/kernel.h>
12#include <linux/slab.h>
13#include <linux/sysfs.h>
b9618c0c
MH		 14#include <linux/regulator/consumer.h>
15#include <linux/err.h>
16#include <linux/gpio.h>
17#include <linux/delay.h>
18#include <linux/sched.h>
99c97852 19#include <linux/module.h>
b9618c0c 20
06458e27
JC		 21#include <linux/iio/iio.h>
22#include <linux/iio/sysfs.h>
23#include <linux/iio/buffer.h>
b9618c0c
MH		 24
25#include "ad7606.h"
26
27int ad7606_reset(struct ad7606_state *st)
28{
68b41aef 29 if (gpio_is_valid(st->pdata->gpio_reset)) {
b9618c0c
MH		 30 gpio_set_value(st->pdata->gpio_reset, 1);
31 ndelay(100); /* t_reset >= 100ns */
32 gpio_set_value(st->pdata->gpio_reset, 0);
33 return 0;
34 }
35
36 return -ENODEV;
37}
38
44039a67 39static int ad7606_scan_direct(struct iio_dev *indio_dev, unsigned ch)
b9618c0c 40{
44039a67 41 struct ad7606_state *st = iio_priv(indio_dev);
b9618c0c
MH		 42 int ret;
43
44 st->done = false;
45 gpio_set_value(st->pdata->gpio_convst, 1);
46
47 ret = wait_event_interruptible(st->wq_data_avail, st->done);
48 if (ret)
49 goto error_ret;
50
68b41aef 51 if (gpio_is_valid(st->pdata->gpio_frstdata)) {
b9618c0c
MH		 52 ret = st->bops->read_block(st->dev, 1, st->data);
53 if (ret)
54 goto error_ret;
55 if (!gpio_get_value(st->pdata->gpio_frstdata)) {
56 /* This should never happen */
57 ad7606_reset(st);
58 ret = -EIO;
59 goto error_ret;
60 }
61 ret = st->bops->read_block(st->dev,
62 st->chip_info->num_channels - 1, &st->data[1]);
63 if (ret)
64 goto error_ret;
65 } else {
66 ret = st->bops->read_block(st->dev,
67 st->chip_info->num_channels, st->data);
68 if (ret)
69 goto error_ret;
70 }
71
72 ret = st->data[ch];
73
74error_ret:
75 gpio_set_value(st->pdata->gpio_convst, 0);
76
77 return ret;
78}
79
b9c44515 80static int ad7606_read_raw(struct iio_dev *indio_dev,
1caf7cb4
MH		 81 struct iio_chan_spec const *chan,
82 int *val,
83 int *val2,
84 long m)
b9618c0c 85{
b9618c0c 86 int ret;
44039a67 87 struct ad7606_state *st = iio_priv(indio_dev);
1caf7cb4
MH		 88 unsigned int scale_uv;
89
90 switch (m) {
b11f98ff 91 case IIO_CHAN_INFO_RAW:
b9c44515 92 mutex_lock(&indio_dev->mlock);
14555b14 93 if (iio_buffer_enabled(indio_dev))
9380d5ed 94 ret = -EBUSY;
1caf7cb4 95 else
44039a67 96 ret = ad7606_scan_direct(indio_dev, chan->address);
b9c44515 97 mutex_unlock(&indio_dev->mlock);
1caf7cb4
MH		 98
99 if (ret < 0)
100 return ret;
101 *val = (short) ret;
102 return IIO_VAL_INT;
c8a9f805 103 case IIO_CHAN_INFO_SCALE:
1caf7cb4
MH		 104 scale_uv = (st->range * 1000 * 2)
105 >> st->chip_info->channels[0].scan_type.realbits;
106 *val = scale_uv / 1000;
107 *val2 = (scale_uv % 1000) * 1000;
108 return IIO_VAL_INT_PLUS_MICRO;
109 }
110 return -EINVAL;
b9618c0c
MH		 111}
112
b9618c0c
MH		 113static ssize_t ad7606_show_range(struct device *dev,
114 struct device_attribute *attr, char *buf)
115{
b9c44515 116 struct iio_dev *indio_dev = dev_get_drvdata(dev);
44039a67 117 struct ad7606_state *st = iio_priv(indio_dev);
b9618c0c
MH		 118
119 return sprintf(buf, "%u\n", st->range);
120}
121
122static ssize_t ad7606_store_range(struct device *dev,
123 struct device_attribute *attr, const char *buf, size_t count)
124{
b9c44515 125 struct iio_dev *indio_dev = dev_get_drvdata(dev);
44039a67 126 struct ad7606_state *st = iio_priv(indio_dev);
b9618c0c
MH		 127 unsigned long lval;
128
129 if (strict_strtoul(buf, 10, &lval))
130 return -EINVAL;
131 if (!(lval == 5000 || lval == 10000)) {
132 dev_err(dev, "range is not supported\n");
133 return -EINVAL;
134 }
b9c44515 135 mutex_lock(&indio_dev->mlock);
b9618c0c
MH		 136 gpio_set_value(st->pdata->gpio_range, lval == 10000);
137 st->range = lval;
b9c44515 138 mutex_unlock(&indio_dev->mlock);
b9618c0c
MH		 139
140 return count;
141}
142
cedd1a16 143static IIO_DEVICE_ATTR(in_voltage_range, S_IRUGO | S_IWUSR, \
b9618c0c 144 ad7606_show_range, ad7606_store_range, 0);
cedd1a16 145static IIO_CONST_ATTR(in_voltage_range_available, "5000 10000");
b9618c0c
MH		 146
147static ssize_t ad7606_show_oversampling_ratio(struct device *dev,
148 struct device_attribute *attr, char *buf)
149{
b9c44515 150 struct iio_dev *indio_dev = dev_get_drvdata(dev);
44039a67 151 struct ad7606_state *st = iio_priv(indio_dev);
b9618c0c
MH		 152
153 return sprintf(buf, "%u\n", st->oversampling);
154}
155
156static int ad7606_oversampling_get_index(unsigned val)
157{
158 unsigned char supported[] = {0, 2, 4, 8, 16, 32, 64};
159 int i;
160
161 for (i = 0; i < ARRAY_SIZE(supported); i++)
162 if (val == supported[i])
163 return i;
164
165 return -EINVAL;
166}
167
168static ssize_t ad7606_store_oversampling_ratio(struct device *dev,
169 struct device_attribute *attr, const char *buf, size_t count)
170{
b9c44515 171 struct iio_dev *indio_dev = dev_get_drvdata(dev);
44039a67 172 struct ad7606_state *st = iio_priv(indio_dev);
b9618c0c
MH		 173 unsigned long lval;
174 int ret;
175
176 if (strict_strtoul(buf, 10, &lval))
177 return -EINVAL;
178
179 ret = ad7606_oversampling_get_index(lval);
180 if (ret < 0) {
181 dev_err(dev, "oversampling %lu is not supported\n", lval);
182 return ret;
183 }
184
b9c44515 185 mutex_lock(&indio_dev->mlock);
b9618c0c
MH		 186 gpio_set_value(st->pdata->gpio_os0, (ret >> 0) & 1);
187 gpio_set_value(st->pdata->gpio_os1, (ret >> 1) & 1);
188 gpio_set_value(st->pdata->gpio_os1, (ret >> 2) & 1);
189 st->oversampling = lval;
b9c44515 190 mutex_unlock(&indio_dev->mlock);
b9618c0c
MH		 191
192 return count;
193}
194
195static IIO_DEVICE_ATTR(oversampling_ratio, S_IRUGO | S_IWUSR,
196 ad7606_show_oversampling_ratio,
197 ad7606_store_oversampling_ratio, 0);
198static IIO_CONST_ATTR(oversampling_ratio_available, "0 2 4 8 16 32 64");
199
9214cc6e 200static struct attribute *ad7606_attributes_os_and_range[] = {
cedd1a16
JC		 201 &iio_dev_attr_in_voltage_range.dev_attr.attr,
202 &iio_const_attr_in_voltage_range_available.dev_attr.attr,
b9618c0c
MH		 203 &iio_dev_attr_oversampling_ratio.dev_attr.attr,
204 &iio_const_attr_oversampling_ratio_available.dev_attr.attr,
205 NULL,
206};
207
9214cc6e
JC		 208static const struct attribute_group ad7606_attribute_group_os_and_range = {
209 .attrs = ad7606_attributes_os_and_range,
210};
b9618c0c 211
9214cc6e
JC		 212static struct attribute *ad7606_attributes_os[] = {
213 &iio_dev_attr_oversampling_ratio.dev_attr.attr,
214 &iio_const_attr_oversampling_ratio_available.dev_attr.attr,
215 NULL,
216};
b9618c0c 217
9214cc6e
JC		 218static const struct attribute_group ad7606_attribute_group_os = {
219 .attrs = ad7606_attributes_os,
220};
221
222static struct attribute *ad7606_attributes_range[] = {
223 &iio_dev_attr_in_voltage_range.dev_attr.attr,
224 &iio_const_attr_in_voltage_range_available.dev_attr.attr,
225 NULL,
226};
227
228static const struct attribute_group ad7606_attribute_group_range = {
229 .attrs = ad7606_attributes_range,
b9618c0c
MH		 230};
231
b11f98ff
JC		 232#define AD7606_CHANNEL(num) \
233 { \
234 .type = IIO_VOLTAGE, \
235 .indexed = 1, \
236 .channel = num, \
237 .address = num, \
238 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT, \
239 .scan_index = num, \
240 .scan_type = IIO_ST('s', 16, 16, 0), \
50ac23be
JC		 241 }
242
1caf7cb4 243static struct iio_chan_spec ad7606_8_channels[] = {
50ac23be
JC		 244 AD7606_CHANNEL(0),
245 AD7606_CHANNEL(1),
246 AD7606_CHANNEL(2),
247 AD7606_CHANNEL(3),
248 AD7606_CHANNEL(4),
249 AD7606_CHANNEL(5),
250 AD7606_CHANNEL(6),
251 AD7606_CHANNEL(7),
1caf7cb4
MH		 252 IIO_CHAN_SOFT_TIMESTAMP(8),
253};
254
255static struct iio_chan_spec ad7606_6_channels[] = {
50ac23be
JC		 256 AD7606_CHANNEL(0),
257 AD7606_CHANNEL(1),
258 AD7606_CHANNEL(2),
259 AD7606_CHANNEL(3),
260 AD7606_CHANNEL(4),
261 AD7606_CHANNEL(5),
1caf7cb4
MH		 262 IIO_CHAN_SOFT_TIMESTAMP(6),
263};
264
265static struct iio_chan_spec ad7606_4_channels[] = {
50ac23be
JC		 266 AD7606_CHANNEL(0),
267 AD7606_CHANNEL(1),
268 AD7606_CHANNEL(2),
269 AD7606_CHANNEL(3),
1caf7cb4
MH		 270 IIO_CHAN_SOFT_TIMESTAMP(4),
271};
272
b9618c0c
MH		 273static const struct ad7606_chip_info ad7606_chip_info_tbl[] = {
274 /*
275 * More devices added in future
276 */
277 [ID_AD7606_8] = {
278 .name = "ad7606",
b9618c0c 279 .int_vref_mv = 2500,
1caf7cb4 280 .channels = ad7606_8_channels,
b9618c0c
MH		 281 .num_channels = 8,
282 },
283 [ID_AD7606_6] = {
284 .name = "ad7606-6",
b9618c0c 285 .int_vref_mv = 2500,
1caf7cb4 286 .channels = ad7606_6_channels,
b9618c0c
MH		 287 .num_channels = 6,
288 },
289 [ID_AD7606_4] = {
290 .name = "ad7606-4",
b9618c0c 291 .int_vref_mv = 2500,
1caf7cb4 292 .channels = ad7606_4_channels,
b9618c0c
MH		 293 .num_channels = 4,
294 },
295};
296
297static int ad7606_request_gpios(struct ad7606_state *st)
298{
299 struct gpio gpio_array[3] = {
300 [0] = {
301 .gpio = st->pdata->gpio_os0,
302 .flags = GPIOF_DIR_OUT | ((st->oversampling & 1) ?
303 GPIOF_INIT_HIGH : GPIOF_INIT_LOW),
304 .label = "AD7606_OS0",
305 },
306 [1] = {
307 .gpio = st->pdata->gpio_os1,
308 .flags = GPIOF_DIR_OUT | ((st->oversampling & 2) ?
309 GPIOF_INIT_HIGH : GPIOF_INIT_LOW),
310 .label = "AD7606_OS1",
311 },
312 [2] = {
313 .gpio = st->pdata->gpio_os2,
314 .flags = GPIOF_DIR_OUT | ((st->oversampling & 4) ?
315 GPIOF_INIT_HIGH : GPIOF_INIT_LOW),
316 .label = "AD7606_OS2",
317 },
318 };
319 int ret;
320
68b41aef
JC		 321 if (gpio_is_valid(st->pdata->gpio_convst)) {
322 ret = gpio_request_one(st->pdata->gpio_convst,
323 GPIOF_OUT_INIT_LOW,
324 "AD7606_CONVST");
325 if (ret) {
326 dev_err(st->dev, "failed to request GPIO CONVST\n");
327 goto error_ret;
328 }
329 } else {
330 ret = -EIO;
331 goto error_ret;
b9618c0c
MH		 332 }
333
68b41aef
JC		 334 if (gpio_is_valid(st->pdata->gpio_os0) &&
335 gpio_is_valid(st->pdata->gpio_os1) &&
336 gpio_is_valid(st->pdata->gpio_os2)) {
337 ret = gpio_request_array(gpio_array, ARRAY_SIZE(gpio_array));
338 if (ret < 0)
339 goto error_free_convst;
340 }
b9618c0c 341
68b41aef
JC		 342 if (gpio_is_valid(st->pdata->gpio_reset)) {
343 ret = gpio_request_one(st->pdata->gpio_reset,
344 GPIOF_OUT_INIT_LOW,
345 "AD7606_RESET");
346 if (ret < 0)
347 goto error_free_os;
348 }
b9618c0c 349
68b41aef
JC		 350 if (gpio_is_valid(st->pdata->gpio_range)) {
351 ret = gpio_request_one(st->pdata->gpio_range, GPIOF_DIR_OUT |
352 ((st->range == 10000) ? GPIOF_INIT_HIGH :
353 GPIOF_INIT_LOW), "AD7606_RANGE");
354 if (ret < 0)
355 goto error_free_reset;
356 }
357 if (gpio_is_valid(st->pdata->gpio_stby)) {
358 ret = gpio_request_one(st->pdata->gpio_stby,
359 GPIOF_OUT_INIT_HIGH,
360 "AD7606_STBY");
361 if (ret < 0)
362 goto error_free_range;
363 }
b9618c0c
MH		 364
365 if (gpio_is_valid(st->pdata->gpio_frstdata)) {
366 ret = gpio_request_one(st->pdata->gpio_frstdata, GPIOF_IN,
367 "AD7606_FRSTDATA");
68b41aef
JC		 368 if (ret < 0)
369 goto error_free_stby;
b9618c0c
MH		 370 }
371
372 return 0;
68b41aef
JC		 373
374error_free_stby:
375 if (gpio_is_valid(st->pdata->gpio_stby))
376 gpio_free(st->pdata->gpio_stby);
377error_free_range:
378 if (gpio_is_valid(st->pdata->gpio_range))
379 gpio_free(st->pdata->gpio_range);
380error_free_reset:
381 if (gpio_is_valid(st->pdata->gpio_reset))
382 gpio_free(st->pdata->gpio_reset);
383error_free_os:
384 if (gpio_is_valid(st->pdata->gpio_os0) &&
385 gpio_is_valid(st->pdata->gpio_os1) &&
386 gpio_is_valid(st->pdata->gpio_os2))
387 gpio_free_array(gpio_array, ARRAY_SIZE(gpio_array));
388error_free_convst:
389 gpio_free(st->pdata->gpio_convst);
390error_ret:
391 return ret;
b9618c0c
MH		 392}
393
394static void ad7606_free_gpios(struct ad7606_state *st)
395{
68b41aef
JC		 396 if (gpio_is_valid(st->pdata->gpio_frstdata))
397 gpio_free(st->pdata->gpio_frstdata);
398 if (gpio_is_valid(st->pdata->gpio_stby))
b9618c0c 399 gpio_free(st->pdata->gpio_stby);
68b41aef
JC		 400 if (gpio_is_valid(st->pdata->gpio_range))
401 gpio_free(st->pdata->gpio_range);
402 if (gpio_is_valid(st->pdata->gpio_reset))
403 gpio_free(st->pdata->gpio_reset);
404 if (gpio_is_valid(st->pdata->gpio_os0) &&
405 gpio_is_valid(st->pdata->gpio_os1) &&
406 gpio_is_valid(st->pdata->gpio_os2)) {
b9618c0c 407 gpio_free(st->pdata->gpio_os2);
68b41aef
JC		 408 gpio_free(st->pdata->gpio_os1);
409 gpio_free(st->pdata->gpio_os0);
b9618c0c 410 }
b9618c0c
MH		 411 gpio_free(st->pdata->gpio_convst);
412}
413
414/**
415 * Interrupt handler
416 */
417static irqreturn_t ad7606_interrupt(int irq, void *dev_id)
418{
e61181d0
MH		 419 struct iio_dev *indio_dev = dev_id;
420 struct ad7606_state *st = iio_priv(indio_dev);
b9618c0c 421
14555b14 422 if (iio_buffer_enabled(indio_dev)) {
b9618c0c
MH		 423 if (!work_pending(&st->poll_work))
424 schedule_work(&st->poll_work);
425 } else {
426 st->done = true;
427 wake_up_interruptible(&st->wq_data_avail);
428 }
429
430 return IRQ_HANDLED;
431};
432
9214cc6e 433static const struct iio_info ad7606_info_no_os_or_range = {
6fe8135f
JC		 434 .driver_module = THIS_MODULE,
435 .read_raw = &ad7606_read_raw,
9214cc6e
JC		 436};
437
438static const struct iio_info ad7606_info_os_and_range = {
439 .driver_module = THIS_MODULE,
440 .read_raw = &ad7606_read_raw,
441 .attrs = &ad7606_attribute_group_os_and_range,
442};
443
444static const struct iio_info ad7606_info_os = {
445 .driver_module = THIS_MODULE,
446 .read_raw = &ad7606_read_raw,
447 .attrs = &ad7606_attribute_group_os,
448};
449
450static const struct iio_info ad7606_info_range = {
451 .driver_module = THIS_MODULE,
452 .read_raw = &ad7606_read_raw,
453 .attrs = &ad7606_attribute_group_range,
6fe8135f
JC		 454};
455
e61181d0 456struct iio_dev *ad7606_probe(struct device *dev, int irq,
b9618c0c
MH		 457 void __iomem *base_address,
458 unsigned id,
459 const struct ad7606_bus_ops *bops)
460{
461 struct ad7606_platform_data *pdata = dev->platform_data;
462 struct ad7606_state *st;
26d25ae3 463 int ret;
e61181d0 464 struct iio_dev *indio_dev = iio_allocate_device(sizeof(*st));
b9618c0c 465
e61181d0 466 if (indio_dev == NULL) {
b9618c0c
MH		 467 ret = -ENOMEM;
468 goto error_ret;
469 }
470
e61181d0
MH		 471 st = iio_priv(indio_dev);
472
b9618c0c 473 st->dev = dev;
b9618c0c
MH		 474 st->bops = bops;
475 st->base_address = base_address;
476 st->range = pdata->default_range == 10000 ? 10000 : 5000;
477
478 ret = ad7606_oversampling_get_index(pdata->default_os);
479 if (ret < 0) {
480 dev_warn(dev, "oversampling %d is not supported\n",
481 pdata->default_os);
482 st->oversampling = 0;
483 } else {
484 st->oversampling = pdata->default_os;
485 }
486
487 st->reg = regulator_get(dev, "vcc");
488 if (!IS_ERR(st->reg)) {
489 ret = regulator_enable(st->reg);
490 if (ret)
491 goto error_put_reg;
492 }
493
494 st->pdata = pdata;
495 st->chip_info = &ad7606_chip_info_tbl[id];
496
e61181d0 497 indio_dev->dev.parent = dev;
9214cc6e
JC		 498 if (gpio_is_valid(st->pdata->gpio_os0) &&
499 gpio_is_valid(st->pdata->gpio_os1) &&
500 gpio_is_valid(st->pdata->gpio_os2)) {
501 if (gpio_is_valid(st->pdata->gpio_range))
502 indio_dev->info = &ad7606_info_os_and_range;
503 else
504 indio_dev->info = &ad7606_info_os;
505 } else {
506 if (gpio_is_valid(st->pdata->gpio_range))
507 indio_dev->info = &ad7606_info_range;
508 else
509 indio_dev->info = &ad7606_info_no_os_or_range;
510 }
e61181d0
MH		 511 indio_dev->modes = INDIO_DIRECT_MODE;
512 indio_dev->name = st->chip_info->name;
513 indio_dev->channels = st->chip_info->channels;
514 indio_dev->num_channels = st->chip_info->num_channels;
b9618c0c
MH		 515
516 init_waitqueue_head(&st->wq_data_avail);
517
518 ret = ad7606_request_gpios(st);
519 if (ret)
e61181d0 520 goto error_disable_reg;
b9618c0c
MH		 521
522 ret = ad7606_reset(st);
523 if (ret)
524 dev_warn(st->dev, "failed to RESET: no RESET GPIO specified\n");
525
8cbb36a0 526 ret = request_irq(irq, ad7606_interrupt,
e61181d0 527 IRQF_TRIGGER_FALLING, st->chip_info->name, indio_dev);
b9618c0c
MH		 528 if (ret)
529 goto error_free_gpios;
530
e61181d0 531 ret = ad7606_register_ring_funcs_and_init(indio_dev);
b9618c0c
MH		 532 if (ret)
533 goto error_free_irq;
534
14555b14
JC		 535 ret = iio_buffer_register(indio_dev,
536 indio_dev->channels,
537 indio_dev->num_channels);
b9618c0c
MH		 538 if (ret)
539 goto error_cleanup_ring;
26d25ae3
JC		 540 ret = iio_device_register(indio_dev);
541 if (ret)
542 goto error_unregister_ring;
b9618c0c 543
e61181d0 544 return indio_dev;
26d25ae3 545error_unregister_ring:
14555b14 546 iio_buffer_unregister(indio_dev);
b9618c0c
MH		 547
548error_cleanup_ring:
e61181d0 549 ad7606_ring_cleanup(indio_dev);
b9618c0c
MH		 550
551error_free_irq:
8cbb36a0 552 free_irq(irq, indio_dev);
b9618c0c
MH		 553
554error_free_gpios:
555 ad7606_free_gpios(st);
556
b9618c0c
MH		 557error_disable_reg:
558 if (!IS_ERR(st->reg))
559 regulator_disable(st->reg);
560error_put_reg:
561 if (!IS_ERR(st->reg))
562 regulator_put(st->reg);
26d25ae3 563 iio_free_device(indio_dev);
b9618c0c
MH		 564error_ret:
565 return ERR_PTR(ret);
566}
567
8cbb36a0 568int ad7606_remove(struct iio_dev *indio_dev, int irq)
b9618c0c 569{
e61181d0
MH		 570 struct ad7606_state *st = iio_priv(indio_dev);
571
d2fffd6c 572 iio_device_unregister(indio_dev);
14555b14 573 iio_buffer_unregister(indio_dev);
b9618c0c 574 ad7606_ring_cleanup(indio_dev);
e61181d0 575
8cbb36a0 576 free_irq(irq, indio_dev);
b9618c0c
MH		 577 if (!IS_ERR(st->reg)) {
578 regulator_disable(st->reg);
579 regulator_put(st->reg);
580 }
581
582 ad7606_free_gpios(st);
d2fffd6c 583 iio_free_device(indio_dev);
b9618c0c 584
b9618c0c
MH		 585 return 0;
586}
587
e61181d0 588void ad7606_suspend(struct iio_dev *indio_dev)
b9618c0c 589{
e61181d0
MH		 590 struct ad7606_state *st = iio_priv(indio_dev);
591
68b41aef
JC		 592 if (gpio_is_valid(st->pdata->gpio_stby)) {
593 if (gpio_is_valid(st->pdata->gpio_range))
b9618c0c
MH		 594 gpio_set_value(st->pdata->gpio_range, 1);
595 gpio_set_value(st->pdata->gpio_stby, 0);
596 }
597}
598
e61181d0 599void ad7606_resume(struct iio_dev *indio_dev)
b9618c0c 600{
e61181d0
MH		 601 struct ad7606_state *st = iio_priv(indio_dev);
602
68b41aef
JC		 603 if (gpio_is_valid(st->pdata->gpio_stby)) {
604 if (gpio_is_valid(st->pdata->gpio_range))
b9618c0c
MH		 605 gpio_set_value(st->pdata->gpio_range,
606 st->range == 10000);
607
608 gpio_set_value(st->pdata->gpio_stby, 1);
609 ad7606_reset(st);
610 }
611}
612
613MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
614MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
615MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
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