projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'v3.5-rc6' into irqdomain/next
[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{
62c51839 116 struct iio_dev *indio_dev = dev_to_iio_dev(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{
62c51839 125 struct iio_dev *indio_dev = dev_to_iio_dev(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{
62c51839 150 struct iio_dev *indio_dev = dev_to_iio_dev(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{
62c51839 171 struct iio_dev *indio_dev = dev_to_iio_dev(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, \
279bf2e5
LPC		 238 .info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT | \
239 IIO_CHAN_INFO_SCALE_SHARED_BIT, \
b11f98ff
JC		 240 .scan_index = num, \
241 .scan_type = IIO_ST('s', 16, 16, 0), \
50ac23be
JC		 242 }
243
1caf7cb4 244static struct iio_chan_spec ad7606_8_channels[] = {
50ac23be
JC		 245 AD7606_CHANNEL(0),
246 AD7606_CHANNEL(1),
247 AD7606_CHANNEL(2),
248 AD7606_CHANNEL(3),
249 AD7606_CHANNEL(4),
250 AD7606_CHANNEL(5),
251 AD7606_CHANNEL(6),
252 AD7606_CHANNEL(7),
1caf7cb4
MH		 253 IIO_CHAN_SOFT_TIMESTAMP(8),
254};
255
256static struct iio_chan_spec ad7606_6_channels[] = {
50ac23be
JC		 257 AD7606_CHANNEL(0),
258 AD7606_CHANNEL(1),
259 AD7606_CHANNEL(2),
260 AD7606_CHANNEL(3),
261 AD7606_CHANNEL(4),
262 AD7606_CHANNEL(5),
1caf7cb4
MH		 263 IIO_CHAN_SOFT_TIMESTAMP(6),
264};
265
266static struct iio_chan_spec ad7606_4_channels[] = {
50ac23be
JC		 267 AD7606_CHANNEL(0),
268 AD7606_CHANNEL(1),
269 AD7606_CHANNEL(2),
270 AD7606_CHANNEL(3),
1caf7cb4
MH		 271 IIO_CHAN_SOFT_TIMESTAMP(4),
272};
273
b9618c0c
MH		 274static const struct ad7606_chip_info ad7606_chip_info_tbl[] = {
275 /*
276 * More devices added in future
277 */
278 [ID_AD7606_8] = {
279 .name = "ad7606",
b9618c0c 280 .int_vref_mv = 2500,
1caf7cb4 281 .channels = ad7606_8_channels,
b9618c0c
MH		 282 .num_channels = 8,
283 },
284 [ID_AD7606_6] = {
285 .name = "ad7606-6",
b9618c0c 286 .int_vref_mv = 2500,
1caf7cb4 287 .channels = ad7606_6_channels,
b9618c0c
MH		 288 .num_channels = 6,
289 },
290 [ID_AD7606_4] = {
291 .name = "ad7606-4",
b9618c0c 292 .int_vref_mv = 2500,
1caf7cb4 293 .channels = ad7606_4_channels,
b9618c0c
MH		 294 .num_channels = 4,
295 },
296};
297
298static int ad7606_request_gpios(struct ad7606_state *st)
299{
300 struct gpio gpio_array[3] = {
301 [0] = {
302 .gpio = st->pdata->gpio_os0,
303 .flags = GPIOF_DIR_OUT | ((st->oversampling & 1) ?
304 GPIOF_INIT_HIGH : GPIOF_INIT_LOW),
305 .label = "AD7606_OS0",
306 },
307 [1] = {
308 .gpio = st->pdata->gpio_os1,
309 .flags = GPIOF_DIR_OUT | ((st->oversampling & 2) ?
310 GPIOF_INIT_HIGH : GPIOF_INIT_LOW),
311 .label = "AD7606_OS1",
312 },
313 [2] = {
314 .gpio = st->pdata->gpio_os2,
315 .flags = GPIOF_DIR_OUT | ((st->oversampling & 4) ?
316 GPIOF_INIT_HIGH : GPIOF_INIT_LOW),
317 .label = "AD7606_OS2",
318 },
319 };
320 int ret;
321
68b41aef
JC		 322 if (gpio_is_valid(st->pdata->gpio_convst)) {
323 ret = gpio_request_one(st->pdata->gpio_convst,
324 GPIOF_OUT_INIT_LOW,
325 "AD7606_CONVST");
326 if (ret) {
327 dev_err(st->dev, "failed to request GPIO CONVST\n");
328 goto error_ret;
329 }
330 } else {
331 ret = -EIO;
332 goto error_ret;
b9618c0c
MH		 333 }
334
68b41aef
JC		 335 if (gpio_is_valid(st->pdata->gpio_os0) &&
336 gpio_is_valid(st->pdata->gpio_os1) &&
337 gpio_is_valid(st->pdata->gpio_os2)) {
338 ret = gpio_request_array(gpio_array, ARRAY_SIZE(gpio_array));
339 if (ret < 0)
340 goto error_free_convst;
341 }
b9618c0c 342
68b41aef
JC		 343 if (gpio_is_valid(st->pdata->gpio_reset)) {
344 ret = gpio_request_one(st->pdata->gpio_reset,
345 GPIOF_OUT_INIT_LOW,
346 "AD7606_RESET");
347 if (ret < 0)
348 goto error_free_os;
349 }
b9618c0c 350
68b41aef
JC		 351 if (gpio_is_valid(st->pdata->gpio_range)) {
352 ret = gpio_request_one(st->pdata->gpio_range, GPIOF_DIR_OUT |
353 ((st->range == 10000) ? GPIOF_INIT_HIGH :
354 GPIOF_INIT_LOW), "AD7606_RANGE");
355 if (ret < 0)
356 goto error_free_reset;
357 }
358 if (gpio_is_valid(st->pdata->gpio_stby)) {
359 ret = gpio_request_one(st->pdata->gpio_stby,
360 GPIOF_OUT_INIT_HIGH,
361 "AD7606_STBY");
362 if (ret < 0)
363 goto error_free_range;
364 }
b9618c0c
MH		 365
366 if (gpio_is_valid(st->pdata->gpio_frstdata)) {
367 ret = gpio_request_one(st->pdata->gpio_frstdata, GPIOF_IN,
368 "AD7606_FRSTDATA");
68b41aef
JC		 369 if (ret < 0)
370 goto error_free_stby;
b9618c0c
MH		 371 }
372
373 return 0;
68b41aef
JC		 374
375error_free_stby:
376 if (gpio_is_valid(st->pdata->gpio_stby))
377 gpio_free(st->pdata->gpio_stby);
378error_free_range:
379 if (gpio_is_valid(st->pdata->gpio_range))
380 gpio_free(st->pdata->gpio_range);
381error_free_reset:
382 if (gpio_is_valid(st->pdata->gpio_reset))
383 gpio_free(st->pdata->gpio_reset);
384error_free_os:
385 if (gpio_is_valid(st->pdata->gpio_os0) &&
386 gpio_is_valid(st->pdata->gpio_os1) &&
387 gpio_is_valid(st->pdata->gpio_os2))
388 gpio_free_array(gpio_array, ARRAY_SIZE(gpio_array));
389error_free_convst:
390 gpio_free(st->pdata->gpio_convst);
391error_ret:
392 return ret;
b9618c0c
MH		 393}
394
395static void ad7606_free_gpios(struct ad7606_state *st)
396{
68b41aef
JC		 397 if (gpio_is_valid(st->pdata->gpio_frstdata))
398 gpio_free(st->pdata->gpio_frstdata);
399 if (gpio_is_valid(st->pdata->gpio_stby))
b9618c0c 400 gpio_free(st->pdata->gpio_stby);
68b41aef
JC		 401 if (gpio_is_valid(st->pdata->gpio_range))
402 gpio_free(st->pdata->gpio_range);
403 if (gpio_is_valid(st->pdata->gpio_reset))
404 gpio_free(st->pdata->gpio_reset);
405 if (gpio_is_valid(st->pdata->gpio_os0) &&
406 gpio_is_valid(st->pdata->gpio_os1) &&
407 gpio_is_valid(st->pdata->gpio_os2)) {
b9618c0c 408 gpio_free(st->pdata->gpio_os2);
68b41aef
JC		 409 gpio_free(st->pdata->gpio_os1);
410 gpio_free(st->pdata->gpio_os0);
b9618c0c 411 }
b9618c0c
MH		 412 gpio_free(st->pdata->gpio_convst);
413}
414
415/**
416 * Interrupt handler
417 */
418static irqreturn_t ad7606_interrupt(int irq, void *dev_id)
419{
e61181d0
MH		 420 struct iio_dev *indio_dev = dev_id;
421 struct ad7606_state *st = iio_priv(indio_dev);
b9618c0c 422
14555b14 423 if (iio_buffer_enabled(indio_dev)) {
b9618c0c
MH		 424 if (!work_pending(&st->poll_work))
425 schedule_work(&st->poll_work);
426 } else {
427 st->done = true;
428 wake_up_interruptible(&st->wq_data_avail);
429 }
430
431 return IRQ_HANDLED;
432};
433
9214cc6e 434static const struct iio_info ad7606_info_no_os_or_range = {
6fe8135f
JC		 435 .driver_module = THIS_MODULE,
436 .read_raw = &ad7606_read_raw,
9214cc6e
JC		 437};
438
439static const struct iio_info ad7606_info_os_and_range = {
440 .driver_module = THIS_MODULE,
441 .read_raw = &ad7606_read_raw,
442 .attrs = &ad7606_attribute_group_os_and_range,
443};
444
445static const struct iio_info ad7606_info_os = {
446 .driver_module = THIS_MODULE,
447 .read_raw = &ad7606_read_raw,
448 .attrs = &ad7606_attribute_group_os,
449};
450
451static const struct iio_info ad7606_info_range = {
452 .driver_module = THIS_MODULE,
453 .read_raw = &ad7606_read_raw,
454 .attrs = &ad7606_attribute_group_range,
6fe8135f
JC		 455};
456
e61181d0 457struct iio_dev *ad7606_probe(struct device *dev, int irq,
b9618c0c
MH		 458 void __iomem *base_address,
459 unsigned id,
460 const struct ad7606_bus_ops *bops)
461{
462 struct ad7606_platform_data *pdata = dev->platform_data;
463 struct ad7606_state *st;
26d25ae3 464 int ret;
7cbb7537 465 struct iio_dev *indio_dev = iio_device_alloc(sizeof(*st));
b9618c0c 466
e61181d0 467 if (indio_dev == NULL) {
b9618c0c
MH		 468 ret = -ENOMEM;
469 goto error_ret;
470 }
471
e61181d0
MH		 472 st = iio_priv(indio_dev);
473
b9618c0c 474 st->dev = dev;
b9618c0c
MH		 475 st->bops = bops;
476 st->base_address = base_address;
477 st->range = pdata->default_range == 10000 ? 10000 : 5000;
478
479 ret = ad7606_oversampling_get_index(pdata->default_os);
480 if (ret < 0) {
481 dev_warn(dev, "oversampling %d is not supported\n",
482 pdata->default_os);
483 st->oversampling = 0;
484 } else {
485 st->oversampling = pdata->default_os;
486 }
487
488 st->reg = regulator_get(dev, "vcc");
489 if (!IS_ERR(st->reg)) {
490 ret = regulator_enable(st->reg);
491 if (ret)
492 goto error_put_reg;
493 }
494
495 st->pdata = pdata;
496 st->chip_info = &ad7606_chip_info_tbl[id];
497
e61181d0 498 indio_dev->dev.parent = dev;
9214cc6e
JC		 499 if (gpio_is_valid(st->pdata->gpio_os0) &&
500 gpio_is_valid(st->pdata->gpio_os1) &&
501 gpio_is_valid(st->pdata->gpio_os2)) {
502 if (gpio_is_valid(st->pdata->gpio_range))
503 indio_dev->info = &ad7606_info_os_and_range;
504 else
505 indio_dev->info = &ad7606_info_os;
506 } else {
507 if (gpio_is_valid(st->pdata->gpio_range))
508 indio_dev->info = &ad7606_info_range;
509 else
510 indio_dev->info = &ad7606_info_no_os_or_range;
511 }
e61181d0
MH		 512 indio_dev->modes = INDIO_DIRECT_MODE;
513 indio_dev->name = st->chip_info->name;
514 indio_dev->channels = st->chip_info->channels;
515 indio_dev->num_channels = st->chip_info->num_channels;
b9618c0c
MH		 516
517 init_waitqueue_head(&st->wq_data_avail);
518
519 ret = ad7606_request_gpios(st);
520 if (ret)
e61181d0 521 goto error_disable_reg;
b9618c0c
MH		 522
523 ret = ad7606_reset(st);
524 if (ret)
525 dev_warn(st->dev, "failed to RESET: no RESET GPIO specified\n");
526
8cbb36a0 527 ret = request_irq(irq, ad7606_interrupt,
e61181d0 528 IRQF_TRIGGER_FALLING, st->chip_info->name, indio_dev);
b9618c0c
MH		 529 if (ret)
530 goto error_free_gpios;
531
e61181d0 532 ret = ad7606_register_ring_funcs_and_init(indio_dev);
b9618c0c
MH		 533 if (ret)
534 goto error_free_irq;
535
14555b14
JC		 536 ret = iio_buffer_register(indio_dev,
537 indio_dev->channels,
538 indio_dev->num_channels);
b9618c0c
MH		 539 if (ret)
540 goto error_cleanup_ring;
26d25ae3
JC		 541 ret = iio_device_register(indio_dev);
542 if (ret)
543 goto error_unregister_ring;
b9618c0c 544
e61181d0 545 return indio_dev;
26d25ae3 546error_unregister_ring:
14555b14 547 iio_buffer_unregister(indio_dev);
b9618c0c
MH		 548
549error_cleanup_ring:
e61181d0 550 ad7606_ring_cleanup(indio_dev);
b9618c0c
MH		 551
552error_free_irq:
8cbb36a0 553 free_irq(irq, indio_dev);
b9618c0c
MH		 554
555error_free_gpios:
556 ad7606_free_gpios(st);
557
b9618c0c
MH		 558error_disable_reg:
559 if (!IS_ERR(st->reg))
560 regulator_disable(st->reg);
561error_put_reg:
562 if (!IS_ERR(st->reg))
563 regulator_put(st->reg);
7cbb7537 564 iio_device_free(indio_dev);
b9618c0c
MH		 565error_ret:
566 return ERR_PTR(ret);
567}
568
8cbb36a0 569int ad7606_remove(struct iio_dev *indio_dev, int irq)
b9618c0c 570{
e61181d0
MH		 571 struct ad7606_state *st = iio_priv(indio_dev);
572
d2fffd6c 573 iio_device_unregister(indio_dev);
14555b14 574 iio_buffer_unregister(indio_dev);
b9618c0c 575 ad7606_ring_cleanup(indio_dev);
e61181d0 576
8cbb36a0 577 free_irq(irq, indio_dev);
b9618c0c
MH		 578 if (!IS_ERR(st->reg)) {
579 regulator_disable(st->reg);
580 regulator_put(st->reg);
581 }
582
583 ad7606_free_gpios(st);
7cbb7537 584 iio_device_free(indio_dev);
b9618c0c 585
b9618c0c
MH		 586 return 0;
587}
588
e61181d0 589void ad7606_suspend(struct iio_dev *indio_dev)
b9618c0c 590{
e61181d0
MH		 591 struct ad7606_state *st = iio_priv(indio_dev);
592
68b41aef
JC		 593 if (gpio_is_valid(st->pdata->gpio_stby)) {
594 if (gpio_is_valid(st->pdata->gpio_range))
b9618c0c
MH		 595 gpio_set_value(st->pdata->gpio_range, 1);
596 gpio_set_value(st->pdata->gpio_stby, 0);
597 }
598}
599
e61181d0 600void ad7606_resume(struct iio_dev *indio_dev)
b9618c0c 601{
e61181d0
MH		 602 struct ad7606_state *st = iio_priv(indio_dev);
603
68b41aef
JC		 604 if (gpio_is_valid(st->pdata->gpio_stby)) {
605 if (gpio_is_valid(st->pdata->gpio_range))
b9618c0c
MH		 606 gpio_set_value(st->pdata->gpio_range,
607 st->range == 10000);
608
609 gpio_set_value(st->pdata->gpio_stby, 1);
610 ad7606_reset(st);
611 }
612}
613
614MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
615MODULE_DESCRIPTION("Analog Devices AD7606 ADC");
616MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
This page took 0.182873 seconds and 5 git commands to generate.