1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * ADMV1013 driver
4 *
5 * Copyright 2021 Analog Devices Inc.
6 */
7
8 #include <linux/bitfield.h>
9 #include <linux/bits.h>
10 #include <linux/clk.h>
11 #include <linux/device.h>
12 #include <linux/iio/iio.h>
13 #include <linux/module.h>
14 #include <linux/mod_devicetable.h>
15 #include <linux/notifier.h>
16 #include <linux/property.h>
17 #include <linux/regulator/consumer.h>
18 #include <linux/spi/spi.h>
19 #include <linux/units.h>
20
21 #include <linux/unaligned.h>
22
23 /* ADMV1013 Register Map */
24 #define ADMV1013_REG_SPI_CONTROL 0x00
25 #define ADMV1013_REG_ALARM 0x01
26 #define ADMV1013_REG_ALARM_MASKS 0x02
27 #define ADMV1013_REG_ENABLE 0x03
28 #define ADMV1013_REG_LO_AMP_I 0x05
29 #define ADMV1013_REG_LO_AMP_Q 0x06
30 #define ADMV1013_REG_OFFSET_ADJUST_I 0x07
31 #define ADMV1013_REG_OFFSET_ADJUST_Q 0x08
32 #define ADMV1013_REG_QUAD 0x09
33 #define ADMV1013_REG_VVA_TEMP_COMP 0x0A
34
35 /* ADMV1013_REG_SPI_CONTROL Map */
36 #define ADMV1013_PARITY_EN_MSK BIT(15)
37 #define ADMV1013_SPI_SOFT_RESET_MSK BIT(14)
38 #define ADMV1013_CHIP_ID_MSK GENMASK(11, 4)
39 #define ADMV1013_CHIP_ID 0xA
40 #define ADMV1013_REVISION_ID_MSK GENMASK(3, 0)
41
42 /* ADMV1013_REG_ALARM Map */
43 #define ADMV1013_PARITY_ERROR_MSK BIT(15)
44 #define ADMV1013_TOO_FEW_ERRORS_MSK BIT(14)
45 #define ADMV1013_TOO_MANY_ERRORS_MSK BIT(13)
46 #define ADMV1013_ADDRESS_RANGE_ERROR_MSK BIT(12)
47
48 /* ADMV1013_REG_ENABLE Map */
49 #define ADMV1013_VGA_PD_MSK BIT(15)
50 #define ADMV1013_MIXER_PD_MSK BIT(14)
51 #define ADMV1013_QUAD_PD_MSK GENMASK(13, 11)
52 #define ADMV1013_BG_PD_MSK BIT(10)
53 #define ADMV1013_MIXER_IF_EN_MSK BIT(7)
54 #define ADMV1013_DET_EN_MSK BIT(5)
55
56 /* ADMV1013_REG_LO_AMP Map */
57 #define ADMV1013_LOAMP_PH_ADJ_FINE_MSK GENMASK(13, 7)
58 #define ADMV1013_MIXER_VGATE_MSK GENMASK(6, 0)
59
60 /* ADMV1013_REG_OFFSET_ADJUST Map */
61 #define ADMV1013_MIXER_OFF_ADJ_P_MSK GENMASK(15, 9)
62 #define ADMV1013_MIXER_OFF_ADJ_N_MSK GENMASK(8, 2)
63
64 /* ADMV1013_REG_QUAD Map */
65 #define ADMV1013_QUAD_SE_MODE_MSK GENMASK(9, 6)
66 #define ADMV1013_QUAD_FILTERS_MSK GENMASK(3, 0)
67
68 /* ADMV1013_REG_VVA_TEMP_COMP Map */
69 #define ADMV1013_VVA_TEMP_COMP_MSK GENMASK(15, 0)
70
71 /* ADMV1013 Miscellaneous Defines */
72 #define ADMV1013_READ BIT(7)
73 #define ADMV1013_REG_ADDR_READ_MSK GENMASK(6, 1)
74 #define ADMV1013_REG_ADDR_WRITE_MSK GENMASK(22, 17)
75 #define ADMV1013_REG_DATA_MSK GENMASK(16, 1)
76
77 enum {
78 ADMV1013_IQ_MODE,
79 ADMV1013_IF_MODE
80 };
81
82 enum {
83 ADMV1013_RFMOD_I_CALIBPHASE,
84 ADMV1013_RFMOD_Q_CALIBPHASE,
85 };
86
87 enum {
88 ADMV1013_SE_MODE_POS = 6,
89 ADMV1013_SE_MODE_NEG = 9,
90 ADMV1013_SE_MODE_DIFF = 12
91 };
92
93 struct admv1013_state {
94 struct spi_device *spi;
95 struct clk *clkin;
96 /* Protect against concurrent accesses to the device and to data */
97 struct mutex lock;
98 struct notifier_block nb;
99 unsigned int input_mode;
100 unsigned int quad_se_mode;
101 bool det_en;
102 u8 data[3] __aligned(IIO_DMA_MINALIGN);
103 };
104
__admv1013_spi_read(struct admv1013_state * st,unsigned int reg,unsigned int * val)105 static int __admv1013_spi_read(struct admv1013_state *st, unsigned int reg,
106 unsigned int *val)
107 {
108 int ret;
109 struct spi_transfer t = {0};
110
111 st->data[0] = ADMV1013_READ | FIELD_PREP(ADMV1013_REG_ADDR_READ_MSK, reg);
112 st->data[1] = 0x0;
113 st->data[2] = 0x0;
114
115 t.rx_buf = &st->data[0];
116 t.tx_buf = &st->data[0];
117 t.len = 3;
118
119 ret = spi_sync_transfer(st->spi, &t, 1);
120 if (ret)
121 return ret;
122
123 *val = FIELD_GET(ADMV1013_REG_DATA_MSK, get_unaligned_be24(&st->data[0]));
124
125 return ret;
126 }
127
admv1013_spi_read(struct admv1013_state * st,unsigned int reg,unsigned int * val)128 static int admv1013_spi_read(struct admv1013_state *st, unsigned int reg,
129 unsigned int *val)
130 {
131 int ret;
132
133 mutex_lock(&st->lock);
134 ret = __admv1013_spi_read(st, reg, val);
135 mutex_unlock(&st->lock);
136
137 return ret;
138 }
139
__admv1013_spi_write(struct admv1013_state * st,unsigned int reg,unsigned int val)140 static int __admv1013_spi_write(struct admv1013_state *st,
141 unsigned int reg,
142 unsigned int val)
143 {
144 put_unaligned_be24(FIELD_PREP(ADMV1013_REG_DATA_MSK, val) |
145 FIELD_PREP(ADMV1013_REG_ADDR_WRITE_MSK, reg), &st->data[0]);
146
147 return spi_write(st->spi, &st->data[0], 3);
148 }
149
admv1013_spi_write(struct admv1013_state * st,unsigned int reg,unsigned int val)150 static int admv1013_spi_write(struct admv1013_state *st, unsigned int reg,
151 unsigned int val)
152 {
153 int ret;
154
155 mutex_lock(&st->lock);
156 ret = __admv1013_spi_write(st, reg, val);
157 mutex_unlock(&st->lock);
158
159 return ret;
160 }
161
__admv1013_spi_update_bits(struct admv1013_state * st,unsigned int reg,unsigned int mask,unsigned int val)162 static int __admv1013_spi_update_bits(struct admv1013_state *st, unsigned int reg,
163 unsigned int mask, unsigned int val)
164 {
165 int ret;
166 unsigned int data, temp;
167
168 ret = __admv1013_spi_read(st, reg, &data);
169 if (ret)
170 return ret;
171
172 temp = (data & ~mask) | (val & mask);
173
174 return __admv1013_spi_write(st, reg, temp);
175 }
176
admv1013_spi_update_bits(struct admv1013_state * st,unsigned int reg,unsigned int mask,unsigned int val)177 static int admv1013_spi_update_bits(struct admv1013_state *st, unsigned int reg,
178 unsigned int mask, unsigned int val)
179 {
180 int ret;
181
182 mutex_lock(&st->lock);
183 ret = __admv1013_spi_update_bits(st, reg, mask, val);
184 mutex_unlock(&st->lock);
185
186 return ret;
187 }
188
admv1013_read_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int * val,int * val2,long info)189 static int admv1013_read_raw(struct iio_dev *indio_dev,
190 struct iio_chan_spec const *chan,
191 int *val, int *val2, long info)
192 {
193 struct admv1013_state *st = iio_priv(indio_dev);
194 unsigned int data, addr;
195 int ret;
196
197 switch (info) {
198 case IIO_CHAN_INFO_CALIBBIAS:
199 switch (chan->channel) {
200 case IIO_MOD_I:
201 addr = ADMV1013_REG_OFFSET_ADJUST_I;
202 break;
203 case IIO_MOD_Q:
204 addr = ADMV1013_REG_OFFSET_ADJUST_Q;
205 break;
206 default:
207 return -EINVAL;
208 }
209
210 ret = admv1013_spi_read(st, addr, &data);
211 if (ret)
212 return ret;
213
214 if (!chan->channel)
215 *val = FIELD_GET(ADMV1013_MIXER_OFF_ADJ_P_MSK, data);
216 else
217 *val = FIELD_GET(ADMV1013_MIXER_OFF_ADJ_N_MSK, data);
218
219 return IIO_VAL_INT;
220 default:
221 return -EINVAL;
222 }
223 }
224
admv1013_write_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int val,int val2,long info)225 static int admv1013_write_raw(struct iio_dev *indio_dev,
226 struct iio_chan_spec const *chan,
227 int val, int val2, long info)
228 {
229 struct admv1013_state *st = iio_priv(indio_dev);
230 unsigned int addr, data, msk;
231
232 switch (info) {
233 case IIO_CHAN_INFO_CALIBBIAS:
234 switch (chan->channel2) {
235 case IIO_MOD_I:
236 addr = ADMV1013_REG_OFFSET_ADJUST_I;
237 break;
238 case IIO_MOD_Q:
239 addr = ADMV1013_REG_OFFSET_ADJUST_Q;
240 break;
241 default:
242 return -EINVAL;
243 }
244
245 if (!chan->channel) {
246 msk = ADMV1013_MIXER_OFF_ADJ_P_MSK;
247 data = FIELD_PREP(ADMV1013_MIXER_OFF_ADJ_P_MSK, val);
248 } else {
249 msk = ADMV1013_MIXER_OFF_ADJ_N_MSK;
250 data = FIELD_PREP(ADMV1013_MIXER_OFF_ADJ_N_MSK, val);
251 }
252
253 return admv1013_spi_update_bits(st, addr, msk, data);
254 default:
255 return -EINVAL;
256 }
257 }
258
admv1013_read(struct iio_dev * indio_dev,uintptr_t private,const struct iio_chan_spec * chan,char * buf)259 static ssize_t admv1013_read(struct iio_dev *indio_dev,
260 uintptr_t private,
261 const struct iio_chan_spec *chan,
262 char *buf)
263 {
264 struct admv1013_state *st = iio_priv(indio_dev);
265 unsigned int data, addr;
266 int ret;
267
268 switch ((u32)private) {
269 case ADMV1013_RFMOD_I_CALIBPHASE:
270 addr = ADMV1013_REG_LO_AMP_I;
271 break;
272 case ADMV1013_RFMOD_Q_CALIBPHASE:
273 addr = ADMV1013_REG_LO_AMP_Q;
274 break;
275 default:
276 return -EINVAL;
277 }
278
279 ret = admv1013_spi_read(st, addr, &data);
280 if (ret)
281 return ret;
282
283 data = FIELD_GET(ADMV1013_LOAMP_PH_ADJ_FINE_MSK, data);
284
285 return sysfs_emit(buf, "%u\n", data);
286 }
287
admv1013_write(struct iio_dev * indio_dev,uintptr_t private,const struct iio_chan_spec * chan,const char * buf,size_t len)288 static ssize_t admv1013_write(struct iio_dev *indio_dev,
289 uintptr_t private,
290 const struct iio_chan_spec *chan,
291 const char *buf, size_t len)
292 {
293 struct admv1013_state *st = iio_priv(indio_dev);
294 unsigned int data;
295 int ret;
296
297 ret = kstrtou32(buf, 10, &data);
298 if (ret)
299 return ret;
300
301 data = FIELD_PREP(ADMV1013_LOAMP_PH_ADJ_FINE_MSK, data);
302
303 switch ((u32)private) {
304 case ADMV1013_RFMOD_I_CALIBPHASE:
305 ret = admv1013_spi_update_bits(st, ADMV1013_REG_LO_AMP_I,
306 ADMV1013_LOAMP_PH_ADJ_FINE_MSK,
307 data);
308 if (ret)
309 return ret;
310 break;
311 case ADMV1013_RFMOD_Q_CALIBPHASE:
312 ret = admv1013_spi_update_bits(st, ADMV1013_REG_LO_AMP_Q,
313 ADMV1013_LOAMP_PH_ADJ_FINE_MSK,
314 data);
315 if (ret)
316 return ret;
317 break;
318 default:
319 return -EINVAL;
320 }
321
322 return ret ? ret : len;
323 }
324
admv1013_update_quad_filters(struct admv1013_state * st)325 static int admv1013_update_quad_filters(struct admv1013_state *st)
326 {
327 unsigned int filt_raw;
328 u64 rate = clk_get_rate(st->clkin);
329
330 if (rate >= (5400 * HZ_PER_MHZ) && rate <= (7000 * HZ_PER_MHZ))
331 filt_raw = 15;
332 else if (rate >= (5400 * HZ_PER_MHZ) && rate <= (8000 * HZ_PER_MHZ))
333 filt_raw = 10;
334 else if (rate >= (6600 * HZ_PER_MHZ) && rate <= (9200 * HZ_PER_MHZ))
335 filt_raw = 5;
336 else
337 filt_raw = 0;
338
339 return __admv1013_spi_update_bits(st, ADMV1013_REG_QUAD,
340 ADMV1013_QUAD_FILTERS_MSK,
341 FIELD_PREP(ADMV1013_QUAD_FILTERS_MSK, filt_raw));
342 }
343
admv1013_update_mixer_vgate(struct admv1013_state * st,int vcm)344 static int admv1013_update_mixer_vgate(struct admv1013_state *st, int vcm)
345 {
346 unsigned int mixer_vgate;
347
348 if (vcm <= 1800000)
349 mixer_vgate = (2389 * vcm / 1000000 + 8100) / 100;
350 else if (vcm > 1800000 && vcm <= 2600000)
351 mixer_vgate = (2375 * vcm / 1000000 + 125) / 100;
352 else
353 return -EINVAL;
354
355 return __admv1013_spi_update_bits(st, ADMV1013_REG_LO_AMP_I,
356 ADMV1013_MIXER_VGATE_MSK,
357 FIELD_PREP(ADMV1013_MIXER_VGATE_MSK, mixer_vgate));
358 }
359
admv1013_reg_access(struct iio_dev * indio_dev,unsigned int reg,unsigned int write_val,unsigned int * read_val)360 static int admv1013_reg_access(struct iio_dev *indio_dev,
361 unsigned int reg,
362 unsigned int write_val,
363 unsigned int *read_val)
364 {
365 struct admv1013_state *st = iio_priv(indio_dev);
366
367 if (read_val)
368 return admv1013_spi_read(st, reg, read_val);
369 else
370 return admv1013_spi_write(st, reg, write_val);
371 }
372
373 static const struct iio_info admv1013_info = {
374 .read_raw = admv1013_read_raw,
375 .write_raw = admv1013_write_raw,
376 .debugfs_reg_access = &admv1013_reg_access,
377 };
378
379 static const char * const admv1013_vcc_regs[] = {
380 "vcc-drv", "vcc2-drv", "vcc-vva", "vcc-amp1", "vcc-amp2",
381 "vcc-env", "vcc-bg", "vcc-bg2", "vcc-mixer", "vcc-quad"
382 };
383
admv1013_freq_change(struct notifier_block * nb,unsigned long action,void * data)384 static int admv1013_freq_change(struct notifier_block *nb, unsigned long action, void *data)
385 {
386 struct admv1013_state *st = container_of(nb, struct admv1013_state, nb);
387 int ret;
388
389 if (action == POST_RATE_CHANGE) {
390 mutex_lock(&st->lock);
391 ret = notifier_from_errno(admv1013_update_quad_filters(st));
392 mutex_unlock(&st->lock);
393 return ret;
394 }
395
396 return NOTIFY_OK;
397 }
398
399 #define _ADMV1013_EXT_INFO(_name, _shared, _ident) { \
400 .name = _name, \
401 .read = admv1013_read, \
402 .write = admv1013_write, \
403 .private = _ident, \
404 .shared = _shared, \
405 }
406
407 static const struct iio_chan_spec_ext_info admv1013_ext_info[] = {
408 _ADMV1013_EXT_INFO("i_calibphase", IIO_SEPARATE, ADMV1013_RFMOD_I_CALIBPHASE),
409 _ADMV1013_EXT_INFO("q_calibphase", IIO_SEPARATE, ADMV1013_RFMOD_Q_CALIBPHASE),
410 { },
411 };
412
413 #define ADMV1013_CHAN_PHASE(_channel, _channel2, _admv1013_ext_info) { \
414 .type = IIO_ALTVOLTAGE, \
415 .output = 0, \
416 .indexed = 1, \
417 .channel2 = _channel2, \
418 .channel = _channel, \
419 .differential = 1, \
420 .ext_info = _admv1013_ext_info, \
421 }
422
423 #define ADMV1013_CHAN_CALIB(_channel, rf_comp) { \
424 .type = IIO_ALTVOLTAGE, \
425 .output = 0, \
426 .indexed = 1, \
427 .channel = _channel, \
428 .channel2 = IIO_MOD_##rf_comp, \
429 .info_mask_separate = BIT(IIO_CHAN_INFO_CALIBBIAS), \
430 }
431
432 static const struct iio_chan_spec admv1013_channels[] = {
433 ADMV1013_CHAN_PHASE(0, 1, admv1013_ext_info),
434 ADMV1013_CHAN_CALIB(0, I),
435 ADMV1013_CHAN_CALIB(0, Q),
436 ADMV1013_CHAN_CALIB(1, I),
437 ADMV1013_CHAN_CALIB(1, Q),
438 };
439
admv1013_init(struct admv1013_state * st,int vcm_uv)440 static int admv1013_init(struct admv1013_state *st, int vcm_uv)
441 {
442 int ret;
443 unsigned int data;
444 struct spi_device *spi = st->spi;
445
446 /* Perform a software reset */
447 ret = __admv1013_spi_update_bits(st, ADMV1013_REG_SPI_CONTROL,
448 ADMV1013_SPI_SOFT_RESET_MSK,
449 FIELD_PREP(ADMV1013_SPI_SOFT_RESET_MSK, 1));
450 if (ret)
451 return ret;
452
453 ret = __admv1013_spi_update_bits(st, ADMV1013_REG_SPI_CONTROL,
454 ADMV1013_SPI_SOFT_RESET_MSK,
455 FIELD_PREP(ADMV1013_SPI_SOFT_RESET_MSK, 0));
456 if (ret)
457 return ret;
458
459 ret = __admv1013_spi_read(st, ADMV1013_REG_SPI_CONTROL, &data);
460 if (ret)
461 return ret;
462
463 data = FIELD_GET(ADMV1013_CHIP_ID_MSK, data);
464 if (data != ADMV1013_CHIP_ID) {
465 dev_err(&spi->dev, "Invalid Chip ID.\n");
466 return -EINVAL;
467 }
468
469 ret = __admv1013_spi_write(st, ADMV1013_REG_VVA_TEMP_COMP, 0xE700);
470 if (ret)
471 return ret;
472
473 data = FIELD_PREP(ADMV1013_QUAD_SE_MODE_MSK, st->quad_se_mode);
474
475 ret = __admv1013_spi_update_bits(st, ADMV1013_REG_QUAD,
476 ADMV1013_QUAD_SE_MODE_MSK, data);
477 if (ret)
478 return ret;
479
480 ret = admv1013_update_mixer_vgate(st, vcm_uv);
481 if (ret)
482 return ret;
483
484 ret = admv1013_update_quad_filters(st);
485 if (ret)
486 return ret;
487
488 return __admv1013_spi_update_bits(st, ADMV1013_REG_ENABLE,
489 ADMV1013_DET_EN_MSK |
490 ADMV1013_MIXER_IF_EN_MSK,
491 st->det_en |
492 st->input_mode);
493 }
494
admv1013_powerdown(void * data)495 static void admv1013_powerdown(void *data)
496 {
497 unsigned int enable_reg, enable_reg_msk;
498
499 /* Disable all components in the Enable Register */
500 enable_reg_msk = ADMV1013_VGA_PD_MSK |
501 ADMV1013_MIXER_PD_MSK |
502 ADMV1013_QUAD_PD_MSK |
503 ADMV1013_BG_PD_MSK |
504 ADMV1013_MIXER_IF_EN_MSK |
505 ADMV1013_DET_EN_MSK;
506
507 enable_reg = FIELD_PREP(ADMV1013_VGA_PD_MSK, 1) |
508 FIELD_PREP(ADMV1013_MIXER_PD_MSK, 1) |
509 FIELD_PREP(ADMV1013_QUAD_PD_MSK, 7) |
510 FIELD_PREP(ADMV1013_BG_PD_MSK, 1) |
511 FIELD_PREP(ADMV1013_MIXER_IF_EN_MSK, 0) |
512 FIELD_PREP(ADMV1013_DET_EN_MSK, 0);
513
514 admv1013_spi_update_bits(data, ADMV1013_REG_ENABLE, enable_reg_msk, enable_reg);
515 }
516
admv1013_properties_parse(struct admv1013_state * st)517 static int admv1013_properties_parse(struct admv1013_state *st)
518 {
519 int ret;
520 const char *str;
521 struct spi_device *spi = st->spi;
522
523 st->det_en = device_property_read_bool(&spi->dev, "adi,detector-enable");
524
525 ret = device_property_read_string(&spi->dev, "adi,input-mode", &str);
526 if (ret)
527 st->input_mode = ADMV1013_IQ_MODE;
528
529 if (!strcmp(str, "iq"))
530 st->input_mode = ADMV1013_IQ_MODE;
531 else if (!strcmp(str, "if"))
532 st->input_mode = ADMV1013_IF_MODE;
533 else
534 return -EINVAL;
535
536 ret = device_property_read_string(&spi->dev, "adi,quad-se-mode", &str);
537 if (ret)
538 st->quad_se_mode = ADMV1013_SE_MODE_DIFF;
539
540 if (!strcmp(str, "diff"))
541 st->quad_se_mode = ADMV1013_SE_MODE_DIFF;
542 else if (!strcmp(str, "se-pos"))
543 st->quad_se_mode = ADMV1013_SE_MODE_POS;
544 else if (!strcmp(str, "se-neg"))
545 st->quad_se_mode = ADMV1013_SE_MODE_NEG;
546 else
547 return -EINVAL;
548
549 ret = devm_regulator_bulk_get_enable(&st->spi->dev,
550 ARRAY_SIZE(admv1013_vcc_regs),
551 admv1013_vcc_regs);
552 if (ret) {
553 dev_err_probe(&spi->dev, ret,
554 "Failed to request VCC regulators\n");
555 return ret;
556 }
557
558 return 0;
559 }
560
admv1013_probe(struct spi_device * spi)561 static int admv1013_probe(struct spi_device *spi)
562 {
563 struct iio_dev *indio_dev;
564 struct admv1013_state *st;
565 int ret, vcm_uv;
566
567 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
568 if (!indio_dev)
569 return -ENOMEM;
570
571 st = iio_priv(indio_dev);
572
573 indio_dev->info = &admv1013_info;
574 indio_dev->name = "admv1013";
575 indio_dev->channels = admv1013_channels;
576 indio_dev->num_channels = ARRAY_SIZE(admv1013_channels);
577
578 st->spi = spi;
579
580 ret = admv1013_properties_parse(st);
581 if (ret)
582 return ret;
583
584 ret = devm_regulator_get_enable_read_voltage(&spi->dev, "vcm");
585 if (ret < 0)
586 return dev_err_probe(&spi->dev, ret,
587 "failed to get the common-mode voltage\n");
588
589 vcm_uv = ret;
590
591 st->clkin = devm_clk_get_enabled(&spi->dev, "lo_in");
592 if (IS_ERR(st->clkin))
593 return dev_err_probe(&spi->dev, PTR_ERR(st->clkin),
594 "failed to get the LO input clock\n");
595
596 st->nb.notifier_call = admv1013_freq_change;
597 ret = devm_clk_notifier_register(&spi->dev, st->clkin, &st->nb);
598 if (ret)
599 return ret;
600
601 mutex_init(&st->lock);
602
603 ret = admv1013_init(st, vcm_uv);
604 if (ret) {
605 dev_err(&spi->dev, "admv1013 init failed\n");
606 return ret;
607 }
608
609 ret = devm_add_action_or_reset(&spi->dev, admv1013_powerdown, st);
610 if (ret)
611 return ret;
612
613 return devm_iio_device_register(&spi->dev, indio_dev);
614 }
615
616 static const struct spi_device_id admv1013_id[] = {
617 { "admv1013", 0 },
618 {}
619 };
620 MODULE_DEVICE_TABLE(spi, admv1013_id);
621
622 static const struct of_device_id admv1013_of_match[] = {
623 { .compatible = "adi,admv1013" },
624 {},
625 };
626 MODULE_DEVICE_TABLE(of, admv1013_of_match);
627
628 static struct spi_driver admv1013_driver = {
629 .driver = {
630 .name = "admv1013",
631 .of_match_table = admv1013_of_match,
632 },
633 .probe = admv1013_probe,
634 .id_table = admv1013_id,
635 };
636 module_spi_driver(admv1013_driver);
637
638 MODULE_AUTHOR("Antoniu Miclaus <antoniu.miclaus@analog.com");
639 MODULE_DESCRIPTION("Analog Devices ADMV1013");
640 MODULE_LICENSE("GPL v2");
641