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8ec4cf53 LPC |
1 | /* |
2 | * AD7266/65 SPI ADC driver | |
3 | * | |
4 | * Copyright 2012 Analog Devices Inc. | |
5 | * | |
6 | * Licensed under the GPL-2. | |
7 | */ | |
8 | ||
9 | #include <linux/device.h> | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/spi/spi.h> | |
13 | #include <linux/regulator/consumer.h> | |
14 | #include <linux/err.h> | |
15 | #include <linux/gpio.h> | |
16 | #include <linux/module.h> | |
17 | ||
18 | #include <linux/interrupt.h> | |
19 | ||
20 | #include <linux/iio/iio.h> | |
21 | #include <linux/iio/buffer.h> | |
22 | #include <linux/iio/trigger_consumer.h> | |
23 | #include <linux/iio/triggered_buffer.h> | |
24 | ||
25 | #include <linux/platform_data/ad7266.h> | |
26 | ||
27 | struct ad7266_state { | |
28 | struct spi_device *spi; | |
29 | struct regulator *reg; | |
2ebc39c0 | 30 | unsigned long vref_mv; |
8ec4cf53 LPC |
31 | |
32 | struct spi_transfer single_xfer[3]; | |
33 | struct spi_message single_msg; | |
34 | ||
35 | enum ad7266_range range; | |
36 | enum ad7266_mode mode; | |
37 | bool fixed_addr; | |
38 | struct gpio gpios[3]; | |
39 | ||
40 | /* | |
41 | * DMA (thus cache coherency maintenance) requires the | |
42 | * transfer buffers to live in their own cache lines. | |
43 | * The buffer needs to be large enough to hold two samples (4 bytes) and | |
44 | * the naturally aligned timestamp (8 bytes). | |
45 | */ | |
54e018da LPC |
46 | struct { |
47 | __be16 sample[2]; | |
48 | s64 timestamp; | |
49 | } data ____cacheline_aligned; | |
8ec4cf53 LPC |
50 | }; |
51 | ||
52 | static int ad7266_wakeup(struct ad7266_state *st) | |
53 | { | |
54 | /* Any read with >= 2 bytes will wake the device */ | |
54e018da | 55 | return spi_read(st->spi, &st->data.sample[0], 2); |
8ec4cf53 LPC |
56 | } |
57 | ||
58 | static int ad7266_powerdown(struct ad7266_state *st) | |
59 | { | |
60 | /* Any read with < 2 bytes will powerdown the device */ | |
54e018da | 61 | return spi_read(st->spi, &st->data.sample[0], 1); |
8ec4cf53 LPC |
62 | } |
63 | ||
64 | static int ad7266_preenable(struct iio_dev *indio_dev) | |
65 | { | |
66 | struct ad7266_state *st = iio_priv(indio_dev); | |
06e1b542 | 67 | return ad7266_wakeup(st); |
8ec4cf53 LPC |
68 | } |
69 | ||
70 | static int ad7266_postdisable(struct iio_dev *indio_dev) | |
71 | { | |
72 | struct ad7266_state *st = iio_priv(indio_dev); | |
73 | return ad7266_powerdown(st); | |
74 | } | |
75 | ||
76 | static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = { | |
77 | .preenable = &ad7266_preenable, | |
78 | .postenable = &iio_triggered_buffer_postenable, | |
79 | .predisable = &iio_triggered_buffer_predisable, | |
80 | .postdisable = &ad7266_postdisable, | |
81 | }; | |
82 | ||
83 | static irqreturn_t ad7266_trigger_handler(int irq, void *p) | |
84 | { | |
85 | struct iio_poll_func *pf = p; | |
86 | struct iio_dev *indio_dev = pf->indio_dev; | |
8ec4cf53 LPC |
87 | struct ad7266_state *st = iio_priv(indio_dev); |
88 | int ret; | |
89 | ||
54e018da | 90 | ret = spi_read(st->spi, st->data.sample, 4); |
8ec4cf53 | 91 | if (ret == 0) { |
54e018da | 92 | iio_push_to_buffers_with_timestamp(indio_dev, &st->data, |
fce8abfd | 93 | pf->timestamp); |
8ec4cf53 LPC |
94 | } |
95 | ||
96 | iio_trigger_notify_done(indio_dev->trig); | |
97 | ||
98 | return IRQ_HANDLED; | |
99 | } | |
100 | ||
101 | static void ad7266_select_input(struct ad7266_state *st, unsigned int nr) | |
102 | { | |
103 | unsigned int i; | |
104 | ||
105 | if (st->fixed_addr) | |
106 | return; | |
107 | ||
108 | switch (st->mode) { | |
109 | case AD7266_MODE_SINGLE_ENDED: | |
110 | nr >>= 1; | |
111 | break; | |
112 | case AD7266_MODE_PSEUDO_DIFF: | |
113 | nr |= 1; | |
114 | break; | |
115 | case AD7266_MODE_DIFF: | |
116 | nr &= ~1; | |
117 | break; | |
118 | } | |
119 | ||
120 | for (i = 0; i < 3; ++i) | |
121 | gpio_set_value(st->gpios[i].gpio, (bool)(nr & BIT(i))); | |
122 | } | |
123 | ||
124 | static int ad7266_update_scan_mode(struct iio_dev *indio_dev, | |
125 | const unsigned long *scan_mask) | |
126 | { | |
127 | struct ad7266_state *st = iio_priv(indio_dev); | |
128 | unsigned int nr = find_first_bit(scan_mask, indio_dev->masklength); | |
129 | ||
130 | ad7266_select_input(st, nr); | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
135 | static int ad7266_read_single(struct ad7266_state *st, int *val, | |
136 | unsigned int address) | |
137 | { | |
138 | int ret; | |
139 | ||
140 | ad7266_select_input(st, address); | |
141 | ||
142 | ret = spi_sync(st->spi, &st->single_msg); | |
54e018da | 143 | *val = be16_to_cpu(st->data.sample[address % 2]); |
8ec4cf53 LPC |
144 | |
145 | return ret; | |
146 | } | |
147 | ||
148 | static int ad7266_read_raw(struct iio_dev *indio_dev, | |
149 | struct iio_chan_spec const *chan, int *val, int *val2, long m) | |
150 | { | |
151 | struct ad7266_state *st = iio_priv(indio_dev); | |
2ebc39c0 | 152 | unsigned long scale_mv; |
8ec4cf53 LPC |
153 | int ret; |
154 | ||
155 | switch (m) { | |
156 | case IIO_CHAN_INFO_RAW: | |
c70df20e | 157 | ret = iio_device_claim_direct_mode(indio_dev); |
8ec4cf53 LPC |
158 | if (ret) |
159 | return ret; | |
c70df20e AS |
160 | ret = ad7266_read_single(st, val, chan->address); |
161 | iio_device_release_direct_mode(indio_dev); | |
8ec4cf53 LPC |
162 | |
163 | *val = (*val >> 2) & 0xfff; | |
164 | if (chan->scan_type.sign == 's') | |
165 | *val = sign_extend32(*val, 11); | |
166 | ||
167 | return IIO_VAL_INT; | |
168 | case IIO_CHAN_INFO_SCALE: | |
2ebc39c0 | 169 | scale_mv = st->vref_mv; |
8ec4cf53 | 170 | if (st->mode == AD7266_MODE_DIFF) |
2ebc39c0 | 171 | scale_mv *= 2; |
8ec4cf53 | 172 | if (st->range == AD7266_RANGE_2VREF) |
2ebc39c0 | 173 | scale_mv *= 2; |
8ec4cf53 | 174 | |
2ebc39c0 LPC |
175 | *val = scale_mv; |
176 | *val2 = chan->scan_type.realbits; | |
177 | return IIO_VAL_FRACTIONAL_LOG2; | |
8ec4cf53 LPC |
178 | case IIO_CHAN_INFO_OFFSET: |
179 | if (st->range == AD7266_RANGE_2VREF && | |
180 | st->mode != AD7266_MODE_DIFF) | |
181 | *val = 2048; | |
182 | else | |
183 | *val = 0; | |
184 | return IIO_VAL_INT; | |
185 | } | |
186 | return -EINVAL; | |
187 | } | |
188 | ||
189 | #define AD7266_CHAN(_chan, _sign) { \ | |
190 | .type = IIO_VOLTAGE, \ | |
191 | .indexed = 1, \ | |
192 | .channel = (_chan), \ | |
193 | .address = (_chan), \ | |
3234ac7e JC |
194 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ |
195 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \ | |
196 | | BIT(IIO_CHAN_INFO_OFFSET), \ | |
8ec4cf53 LPC |
197 | .scan_index = (_chan), \ |
198 | .scan_type = { \ | |
199 | .sign = (_sign), \ | |
200 | .realbits = 12, \ | |
201 | .storagebits = 16, \ | |
202 | .shift = 2, \ | |
203 | .endianness = IIO_BE, \ | |
204 | }, \ | |
205 | } | |
206 | ||
207 | #define AD7266_DECLARE_SINGLE_ENDED_CHANNELS(_name, _sign) \ | |
208 | const struct iio_chan_spec ad7266_channels_##_name[] = { \ | |
209 | AD7266_CHAN(0, (_sign)), \ | |
210 | AD7266_CHAN(1, (_sign)), \ | |
211 | AD7266_CHAN(2, (_sign)), \ | |
212 | AD7266_CHAN(3, (_sign)), \ | |
213 | AD7266_CHAN(4, (_sign)), \ | |
214 | AD7266_CHAN(5, (_sign)), \ | |
215 | AD7266_CHAN(6, (_sign)), \ | |
216 | AD7266_CHAN(7, (_sign)), \ | |
217 | AD7266_CHAN(8, (_sign)), \ | |
218 | AD7266_CHAN(9, (_sign)), \ | |
219 | AD7266_CHAN(10, (_sign)), \ | |
220 | AD7266_CHAN(11, (_sign)), \ | |
221 | IIO_CHAN_SOFT_TIMESTAMP(13), \ | |
222 | } | |
223 | ||
224 | #define AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(_name, _sign) \ | |
225 | const struct iio_chan_spec ad7266_channels_##_name##_fixed[] = { \ | |
226 | AD7266_CHAN(0, (_sign)), \ | |
227 | AD7266_CHAN(1, (_sign)), \ | |
228 | IIO_CHAN_SOFT_TIMESTAMP(2), \ | |
229 | } | |
230 | ||
231 | static AD7266_DECLARE_SINGLE_ENDED_CHANNELS(u, 'u'); | |
232 | static AD7266_DECLARE_SINGLE_ENDED_CHANNELS(s, 's'); | |
233 | static AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(u, 'u'); | |
234 | static AD7266_DECLARE_SINGLE_ENDED_CHANNELS_FIXED(s, 's'); | |
235 | ||
236 | #define AD7266_CHAN_DIFF(_chan, _sign) { \ | |
237 | .type = IIO_VOLTAGE, \ | |
238 | .indexed = 1, \ | |
239 | .channel = (_chan) * 2, \ | |
240 | .channel2 = (_chan) * 2 + 1, \ | |
241 | .address = (_chan), \ | |
3234ac7e JC |
242 | .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ |
243 | .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) \ | |
244 | | BIT(IIO_CHAN_INFO_OFFSET), \ | |
8ec4cf53 LPC |
245 | .scan_index = (_chan), \ |
246 | .scan_type = { \ | |
247 | .sign = _sign, \ | |
248 | .realbits = 12, \ | |
249 | .storagebits = 16, \ | |
250 | .shift = 2, \ | |
251 | .endianness = IIO_BE, \ | |
252 | }, \ | |
253 | .differential = 1, \ | |
254 | } | |
255 | ||
256 | #define AD7266_DECLARE_DIFF_CHANNELS(_name, _sign) \ | |
257 | const struct iio_chan_spec ad7266_channels_diff_##_name[] = { \ | |
258 | AD7266_CHAN_DIFF(0, (_sign)), \ | |
259 | AD7266_CHAN_DIFF(1, (_sign)), \ | |
260 | AD7266_CHAN_DIFF(2, (_sign)), \ | |
261 | AD7266_CHAN_DIFF(3, (_sign)), \ | |
262 | AD7266_CHAN_DIFF(4, (_sign)), \ | |
263 | AD7266_CHAN_DIFF(5, (_sign)), \ | |
264 | IIO_CHAN_SOFT_TIMESTAMP(6), \ | |
265 | } | |
266 | ||
267 | static AD7266_DECLARE_DIFF_CHANNELS(s, 's'); | |
268 | static AD7266_DECLARE_DIFF_CHANNELS(u, 'u'); | |
269 | ||
270 | #define AD7266_DECLARE_DIFF_CHANNELS_FIXED(_name, _sign) \ | |
271 | const struct iio_chan_spec ad7266_channels_diff_fixed_##_name[] = { \ | |
272 | AD7266_CHAN_DIFF(0, (_sign)), \ | |
273 | AD7266_CHAN_DIFF(1, (_sign)), \ | |
274 | IIO_CHAN_SOFT_TIMESTAMP(2), \ | |
275 | } | |
276 | ||
277 | static AD7266_DECLARE_DIFF_CHANNELS_FIXED(s, 's'); | |
278 | static AD7266_DECLARE_DIFF_CHANNELS_FIXED(u, 'u'); | |
279 | ||
280 | static const struct iio_info ad7266_info = { | |
281 | .read_raw = &ad7266_read_raw, | |
282 | .update_scan_mode = &ad7266_update_scan_mode, | |
8ec4cf53 LPC |
283 | }; |
284 | ||
2bdb3afc | 285 | static const unsigned long ad7266_available_scan_masks[] = { |
8ec4cf53 LPC |
286 | 0x003, |
287 | 0x00c, | |
288 | 0x030, | |
289 | 0x0c0, | |
290 | 0x300, | |
291 | 0xc00, | |
292 | 0x000, | |
293 | }; | |
294 | ||
2bdb3afc | 295 | static const unsigned long ad7266_available_scan_masks_diff[] = { |
8ec4cf53 LPC |
296 | 0x003, |
297 | 0x00c, | |
298 | 0x030, | |
299 | 0x000, | |
300 | }; | |
301 | ||
2bdb3afc | 302 | static const unsigned long ad7266_available_scan_masks_fixed[] = { |
8ec4cf53 LPC |
303 | 0x003, |
304 | 0x000, | |
305 | }; | |
306 | ||
307 | struct ad7266_chan_info { | |
308 | const struct iio_chan_spec *channels; | |
309 | unsigned int num_channels; | |
2bdb3afc | 310 | const unsigned long *scan_masks; |
8ec4cf53 LPC |
311 | }; |
312 | ||
313 | #define AD7266_CHAN_INFO_INDEX(_differential, _signed, _fixed) \ | |
314 | (((_differential) << 2) | ((_signed) << 1) | ((_fixed) << 0)) | |
315 | ||
316 | static const struct ad7266_chan_info ad7266_chan_infos[] = { | |
317 | [AD7266_CHAN_INFO_INDEX(0, 0, 0)] = { | |
318 | .channels = ad7266_channels_u, | |
319 | .num_channels = ARRAY_SIZE(ad7266_channels_u), | |
320 | .scan_masks = ad7266_available_scan_masks, | |
321 | }, | |
322 | [AD7266_CHAN_INFO_INDEX(0, 0, 1)] = { | |
323 | .channels = ad7266_channels_u_fixed, | |
324 | .num_channels = ARRAY_SIZE(ad7266_channels_u_fixed), | |
325 | .scan_masks = ad7266_available_scan_masks_fixed, | |
326 | }, | |
327 | [AD7266_CHAN_INFO_INDEX(0, 1, 0)] = { | |
328 | .channels = ad7266_channels_s, | |
329 | .num_channels = ARRAY_SIZE(ad7266_channels_s), | |
330 | .scan_masks = ad7266_available_scan_masks, | |
331 | }, | |
332 | [AD7266_CHAN_INFO_INDEX(0, 1, 1)] = { | |
333 | .channels = ad7266_channels_s_fixed, | |
334 | .num_channels = ARRAY_SIZE(ad7266_channels_s_fixed), | |
335 | .scan_masks = ad7266_available_scan_masks_fixed, | |
336 | }, | |
337 | [AD7266_CHAN_INFO_INDEX(1, 0, 0)] = { | |
338 | .channels = ad7266_channels_diff_u, | |
339 | .num_channels = ARRAY_SIZE(ad7266_channels_diff_u), | |
340 | .scan_masks = ad7266_available_scan_masks_diff, | |
341 | }, | |
342 | [AD7266_CHAN_INFO_INDEX(1, 0, 1)] = { | |
343 | .channels = ad7266_channels_diff_fixed_u, | |
344 | .num_channels = ARRAY_SIZE(ad7266_channels_diff_fixed_u), | |
345 | .scan_masks = ad7266_available_scan_masks_fixed, | |
346 | }, | |
347 | [AD7266_CHAN_INFO_INDEX(1, 1, 0)] = { | |
348 | .channels = ad7266_channels_diff_s, | |
349 | .num_channels = ARRAY_SIZE(ad7266_channels_diff_s), | |
350 | .scan_masks = ad7266_available_scan_masks_diff, | |
351 | }, | |
352 | [AD7266_CHAN_INFO_INDEX(1, 1, 1)] = { | |
353 | .channels = ad7266_channels_diff_fixed_s, | |
354 | .num_channels = ARRAY_SIZE(ad7266_channels_diff_fixed_s), | |
355 | .scan_masks = ad7266_available_scan_masks_fixed, | |
356 | }, | |
357 | }; | |
358 | ||
fc52692c | 359 | static void ad7266_init_channels(struct iio_dev *indio_dev) |
8ec4cf53 LPC |
360 | { |
361 | struct ad7266_state *st = iio_priv(indio_dev); | |
362 | bool is_differential, is_signed; | |
363 | const struct ad7266_chan_info *chan_info; | |
364 | int i; | |
365 | ||
366 | is_differential = st->mode != AD7266_MODE_SINGLE_ENDED; | |
367 | is_signed = (st->range == AD7266_RANGE_2VREF) | | |
368 | (st->mode == AD7266_MODE_DIFF); | |
369 | ||
370 | i = AD7266_CHAN_INFO_INDEX(is_differential, is_signed, st->fixed_addr); | |
371 | chan_info = &ad7266_chan_infos[i]; | |
372 | ||
373 | indio_dev->channels = chan_info->channels; | |
374 | indio_dev->num_channels = chan_info->num_channels; | |
375 | indio_dev->available_scan_masks = chan_info->scan_masks; | |
376 | indio_dev->masklength = chan_info->num_channels - 1; | |
377 | } | |
378 | ||
379 | static const char * const ad7266_gpio_labels[] = { | |
380 | "AD0", "AD1", "AD2", | |
381 | }; | |
382 | ||
fc52692c | 383 | static int ad7266_probe(struct spi_device *spi) |
8ec4cf53 LPC |
384 | { |
385 | struct ad7266_platform_data *pdata = spi->dev.platform_data; | |
386 | struct iio_dev *indio_dev; | |
387 | struct ad7266_state *st; | |
388 | unsigned int i; | |
389 | int ret; | |
390 | ||
ded4fef9 | 391 | indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); |
8ec4cf53 LPC |
392 | if (indio_dev == NULL) |
393 | return -ENOMEM; | |
394 | ||
395 | st = iio_priv(indio_dev); | |
396 | ||
e5511c81 | 397 | st->reg = devm_regulator_get_optional(&spi->dev, "vref"); |
6b7f4e25 | 398 | if (!IS_ERR(st->reg)) { |
8ec4cf53 LPC |
399 | ret = regulator_enable(st->reg); |
400 | if (ret) | |
ded4fef9 | 401 | return ret; |
8ec4cf53 | 402 | |
36ce0c1c AL |
403 | ret = regulator_get_voltage(st->reg); |
404 | if (ret < 0) | |
405 | goto error_disable_reg; | |
406 | ||
2ebc39c0 | 407 | st->vref_mv = ret / 1000; |
8ec4cf53 | 408 | } else { |
68b356eb MB |
409 | /* Any other error indicates that the regulator does exist */ |
410 | if (PTR_ERR(st->reg) != -ENODEV) | |
411 | return PTR_ERR(st->reg); | |
8ec4cf53 | 412 | /* Use internal reference */ |
2ebc39c0 | 413 | st->vref_mv = 2500; |
8ec4cf53 LPC |
414 | } |
415 | ||
416 | if (pdata) { | |
417 | st->fixed_addr = pdata->fixed_addr; | |
418 | st->mode = pdata->mode; | |
419 | st->range = pdata->range; | |
420 | ||
421 | if (!st->fixed_addr) { | |
422 | for (i = 0; i < ARRAY_SIZE(st->gpios); ++i) { | |
423 | st->gpios[i].gpio = pdata->addr_gpios[i]; | |
424 | st->gpios[i].flags = GPIOF_OUT_INIT_LOW; | |
425 | st->gpios[i].label = ad7266_gpio_labels[i]; | |
426 | } | |
427 | ret = gpio_request_array(st->gpios, | |
428 | ARRAY_SIZE(st->gpios)); | |
429 | if (ret) | |
430 | goto error_disable_reg; | |
431 | } | |
432 | } else { | |
433 | st->fixed_addr = true; | |
434 | st->range = AD7266_RANGE_VREF; | |
435 | st->mode = AD7266_MODE_DIFF; | |
436 | } | |
437 | ||
438 | spi_set_drvdata(spi, indio_dev); | |
439 | st->spi = spi; | |
440 | ||
441 | indio_dev->dev.parent = &spi->dev; | |
b541eaff | 442 | indio_dev->dev.of_node = spi->dev.of_node; |
8ec4cf53 LPC |
443 | indio_dev->name = spi_get_device_id(spi)->name; |
444 | indio_dev->modes = INDIO_DIRECT_MODE; | |
445 | indio_dev->info = &ad7266_info; | |
446 | ||
447 | ad7266_init_channels(indio_dev); | |
448 | ||
449 | /* wakeup */ | |
54e018da | 450 | st->single_xfer[0].rx_buf = &st->data.sample[0]; |
8ec4cf53 LPC |
451 | st->single_xfer[0].len = 2; |
452 | st->single_xfer[0].cs_change = 1; | |
453 | /* conversion */ | |
54e018da | 454 | st->single_xfer[1].rx_buf = st->data.sample; |
8ec4cf53 LPC |
455 | st->single_xfer[1].len = 4; |
456 | st->single_xfer[1].cs_change = 1; | |
457 | /* powerdown */ | |
54e018da | 458 | st->single_xfer[2].tx_buf = &st->data.sample[0]; |
8ec4cf53 LPC |
459 | st->single_xfer[2].len = 1; |
460 | ||
461 | spi_message_init(&st->single_msg); | |
462 | spi_message_add_tail(&st->single_xfer[0], &st->single_msg); | |
463 | spi_message_add_tail(&st->single_xfer[1], &st->single_msg); | |
464 | spi_message_add_tail(&st->single_xfer[2], &st->single_msg); | |
465 | ||
466 | ret = iio_triggered_buffer_setup(indio_dev, &iio_pollfunc_store_time, | |
467 | &ad7266_trigger_handler, &iio_triggered_buffer_setup_ops); | |
468 | if (ret) | |
469 | goto error_free_gpios; | |
470 | ||
471 | ret = iio_device_register(indio_dev); | |
472 | if (ret) | |
473 | goto error_buffer_cleanup; | |
474 | ||
475 | return 0; | |
476 | ||
477 | error_buffer_cleanup: | |
478 | iio_triggered_buffer_cleanup(indio_dev); | |
479 | error_free_gpios: | |
480 | if (!st->fixed_addr) | |
481 | gpio_free_array(st->gpios, ARRAY_SIZE(st->gpios)); | |
482 | error_disable_reg: | |
fbe84bd4 | 483 | if (!IS_ERR(st->reg)) |
8ec4cf53 | 484 | regulator_disable(st->reg); |
8ec4cf53 LPC |
485 | |
486 | return ret; | |
487 | } | |
488 | ||
fc52692c | 489 | static int ad7266_remove(struct spi_device *spi) |
8ec4cf53 LPC |
490 | { |
491 | struct iio_dev *indio_dev = spi_get_drvdata(spi); | |
492 | struct ad7266_state *st = iio_priv(indio_dev); | |
493 | ||
494 | iio_device_unregister(indio_dev); | |
495 | iio_triggered_buffer_cleanup(indio_dev); | |
496 | if (!st->fixed_addr) | |
497 | gpio_free_array(st->gpios, ARRAY_SIZE(st->gpios)); | |
fbe84bd4 | 498 | if (!IS_ERR(st->reg)) |
8ec4cf53 | 499 | regulator_disable(st->reg); |
8ec4cf53 LPC |
500 | |
501 | return 0; | |
502 | } | |
503 | ||
504 | static const struct spi_device_id ad7266_id[] = { | |
505 | {"ad7265", 0}, | |
506 | {"ad7266", 0}, | |
507 | { } | |
508 | }; | |
509 | MODULE_DEVICE_TABLE(spi, ad7266_id); | |
510 | ||
511 | static struct spi_driver ad7266_driver = { | |
512 | .driver = { | |
513 | .name = "ad7266", | |
8ec4cf53 LPC |
514 | }, |
515 | .probe = ad7266_probe, | |
fc52692c | 516 | .remove = ad7266_remove, |
8ec4cf53 LPC |
517 | .id_table = ad7266_id, |
518 | }; | |
519 | module_spi_driver(ad7266_driver); | |
520 | ||
521 | MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>"); | |
522 | MODULE_DESCRIPTION("Analog Devices AD7266/65 ADC"); | |
523 | MODULE_LICENSE("GPL v2"); |