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 <asm/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 regulator *reg;
99 struct notifier_block nb;
100 unsigned int input_mode;
101 unsigned int quad_se_mode;
102 bool det_en;
103 u8 data[3] __aligned(IIO_DMA_MINALIGN);
104 };
105
__admv1013_spi_read(struct admv1013_state * st,unsigned int reg,unsigned int * val)106 static int __admv1013_spi_read(struct admv1013_state *st, unsigned int reg,
107 unsigned int *val)
108 {
109 int ret;
110 struct spi_transfer t = {0};
111
112 st->data[0] = ADMV1013_READ | FIELD_PREP(ADMV1013_REG_ADDR_READ_MSK, reg);
113 st->data[1] = 0x0;
114 st->data[2] = 0x0;
115
116 t.rx_buf = &st->data[0];
117 t.tx_buf = &st->data[0];
118 t.len = 3;
119
120 ret = spi_sync_transfer(st->spi, &t, 1);
121 if (ret)
122 return ret;
123
124 *val = FIELD_GET(ADMV1013_REG_DATA_MSK, get_unaligned_be24(&st->data[0]));
125
126 return ret;
127 }
128
admv1013_spi_read(struct admv1013_state * st,unsigned int reg,unsigned int * val)129 static int admv1013_spi_read(struct admv1013_state *st, unsigned int reg,
130 unsigned int *val)
131 {
132 int ret;
133
134 mutex_lock(&st->lock);
135 ret = __admv1013_spi_read(st, reg, val);
136 mutex_unlock(&st->lock);
137
138 return ret;
139 }
140
__admv1013_spi_write(struct admv1013_state * st,unsigned int reg,unsigned int val)141 static int __admv1013_spi_write(struct admv1013_state *st,
142 unsigned int reg,
143 unsigned int val)
144 {
145 put_unaligned_be24(FIELD_PREP(ADMV1013_REG_DATA_MSK, val) |
146 FIELD_PREP(ADMV1013_REG_ADDR_WRITE_MSK, reg), &st->data[0]);
147
148 return spi_write(st->spi, &st->data[0], 3);
149 }
150
admv1013_spi_write(struct admv1013_state * st,unsigned int reg,unsigned int val)151 static int admv1013_spi_write(struct admv1013_state *st, unsigned int reg,
152 unsigned int val)
153 {
154 int ret;
155
156 mutex_lock(&st->lock);
157 ret = __admv1013_spi_write(st, reg, val);
158 mutex_unlock(&st->lock);
159
160 return ret;
161 }
162
__admv1013_spi_update_bits(struct admv1013_state * st,unsigned int reg,unsigned int mask,unsigned int val)163 static int __admv1013_spi_update_bits(struct admv1013_state *st, unsigned int reg,
164 unsigned int mask, unsigned int val)
165 {
166 int ret;
167 unsigned int data, temp;
168
169 ret = __admv1013_spi_read(st, reg, &data);
170 if (ret)
171 return ret;
172
173 temp = (data & ~mask) | (val & mask);
174
175 return __admv1013_spi_write(st, reg, temp);
176 }
177
admv1013_spi_update_bits(struct admv1013_state * st,unsigned int reg,unsigned int mask,unsigned int val)178 static int admv1013_spi_update_bits(struct admv1013_state *st, unsigned int reg,
179 unsigned int mask, unsigned int val)
180 {
181 int ret;
182
183 mutex_lock(&st->lock);
184 ret = __admv1013_spi_update_bits(st, reg, mask, val);
185 mutex_unlock(&st->lock);
186
187 return ret;
188 }
189
admv1013_read_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int * val,int * val2,long info)190 static int admv1013_read_raw(struct iio_dev *indio_dev,
191 struct iio_chan_spec const *chan,
192 int *val, int *val2, long info)
193 {
194 struct admv1013_state *st = iio_priv(indio_dev);
195 unsigned int data, addr;
196 int ret;
197
198 switch (info) {
199 case IIO_CHAN_INFO_CALIBBIAS:
200 switch (chan->channel) {
201 case IIO_MOD_I:
202 addr = ADMV1013_REG_OFFSET_ADJUST_I;
203 break;
204 case IIO_MOD_Q:
205 addr = ADMV1013_REG_OFFSET_ADJUST_Q;
206 break;
207 default:
208 return -EINVAL;
209 }
210
211 ret = admv1013_spi_read(st, addr, &data);
212 if (ret)
213 return ret;
214
215 if (!chan->channel)
216 *val = FIELD_GET(ADMV1013_MIXER_OFF_ADJ_P_MSK, data);
217 else
218 *val = FIELD_GET(ADMV1013_MIXER_OFF_ADJ_N_MSK, data);
219
220 return IIO_VAL_INT;
221 default:
222 return -EINVAL;
223 }
224 }
225
admv1013_write_raw(struct iio_dev * indio_dev,struct iio_chan_spec const * chan,int val,int val2,long info)226 static int admv1013_write_raw(struct iio_dev *indio_dev,
227 struct iio_chan_spec const *chan,
228 int val, int val2, long info)
229 {
230 struct admv1013_state *st = iio_priv(indio_dev);
231 unsigned int addr, data, msk;
232
233 switch (info) {
234 case IIO_CHAN_INFO_CALIBBIAS:
235 switch (chan->channel2) {
236 case IIO_MOD_I:
237 addr = ADMV1013_REG_OFFSET_ADJUST_I;
238 break;
239 case IIO_MOD_Q:
240 addr = ADMV1013_REG_OFFSET_ADJUST_Q;
241 break;
242 default:
243 return -EINVAL;
244 }
245
246 if (!chan->channel) {
247 msk = ADMV1013_MIXER_OFF_ADJ_P_MSK;
248 data = FIELD_PREP(ADMV1013_MIXER_OFF_ADJ_P_MSK, val);
249 } else {
250 msk = ADMV1013_MIXER_OFF_ADJ_N_MSK;
251 data = FIELD_PREP(ADMV1013_MIXER_OFF_ADJ_N_MSK, val);
252 }
253
254 return admv1013_spi_update_bits(st, addr, msk, data);
255 default:
256 return -EINVAL;
257 }
258 }
259
admv1013_read(struct iio_dev * indio_dev,uintptr_t private,const struct iio_chan_spec * chan,char * buf)260 static ssize_t admv1013_read(struct iio_dev *indio_dev,
261 uintptr_t private,
262 const struct iio_chan_spec *chan,
263 char *buf)
264 {
265 struct admv1013_state *st = iio_priv(indio_dev);
266 unsigned int data, addr;
267 int ret;
268
269 switch ((u32)private) {
270 case ADMV1013_RFMOD_I_CALIBPHASE:
271 addr = ADMV1013_REG_LO_AMP_I;
272 break;
273 case ADMV1013_RFMOD_Q_CALIBPHASE:
274 addr = ADMV1013_REG_LO_AMP_Q;
275 break;
276 default:
277 return -EINVAL;
278 }
279
280 ret = admv1013_spi_read(st, addr, &data);
281 if (ret)
282 return ret;
283
284 data = FIELD_GET(ADMV1013_LOAMP_PH_ADJ_FINE_MSK, data);
285
286 return sysfs_emit(buf, "%u\n", data);
287 }
288
admv1013_write(struct iio_dev * indio_dev,uintptr_t private,const struct iio_chan_spec * chan,const char * buf,size_t len)289 static ssize_t admv1013_write(struct iio_dev *indio_dev,
290 uintptr_t private,
291 const struct iio_chan_spec *chan,
292 const char *buf, size_t len)
293 {
294 struct admv1013_state *st = iio_priv(indio_dev);
295 unsigned int data;
296 int ret;
297
298 ret = kstrtou32(buf, 10, &data);
299 if (ret)
300 return ret;
301
302 data = FIELD_PREP(ADMV1013_LOAMP_PH_ADJ_FINE_MSK, data);
303
304 switch ((u32)private) {
305 case ADMV1013_RFMOD_I_CALIBPHASE:
306 ret = admv1013_spi_update_bits(st, ADMV1013_REG_LO_AMP_I,
307 ADMV1013_LOAMP_PH_ADJ_FINE_MSK,
308 data);
309 if (ret)
310 return ret;
311 break;
312 case ADMV1013_RFMOD_Q_CALIBPHASE:
313 ret = admv1013_spi_update_bits(st, ADMV1013_REG_LO_AMP_Q,
314 ADMV1013_LOAMP_PH_ADJ_FINE_MSK,
315 data);
316 if (ret)
317 return ret;
318 break;
319 default:
320 return -EINVAL;
321 }
322
323 return ret ? ret : len;
324 }
325
admv1013_update_quad_filters(struct admv1013_state * st)326 static int admv1013_update_quad_filters(struct admv1013_state *st)
327 {
328 unsigned int filt_raw;
329 u64 rate = clk_get_rate(st->clkin);
330
331 if (rate >= (5400 * HZ_PER_MHZ) && rate <= (7000 * HZ_PER_MHZ))
332 filt_raw = 15;
333 else if (rate >= (5400 * HZ_PER_MHZ) && rate <= (8000 * HZ_PER_MHZ))
334 filt_raw = 10;
335 else if (rate >= (6600 * HZ_PER_MHZ) && rate <= (9200 * HZ_PER_MHZ))
336 filt_raw = 5;
337 else
338 filt_raw = 0;
339
340 return __admv1013_spi_update_bits(st, ADMV1013_REG_QUAD,
341 ADMV1013_QUAD_FILTERS_MSK,
342 FIELD_PREP(ADMV1013_QUAD_FILTERS_MSK, filt_raw));
343 }
344
admv1013_update_mixer_vgate(struct admv1013_state * st)345 static int admv1013_update_mixer_vgate(struct admv1013_state *st)
346 {
347 unsigned int mixer_vgate;
348 int vcm;
349
350 vcm = regulator_get_voltage(st->reg);
351 if (vcm < 0)
352 return vcm;
353
354 if (vcm <= 1800000)
355 mixer_vgate = (2389 * vcm / 1000000 + 8100) / 100;
356 else if (vcm > 1800000 && vcm <= 2600000)
357 mixer_vgate = (2375 * vcm / 1000000 + 125) / 100;
358 else
359 return -EINVAL;
360
361 return __admv1013_spi_update_bits(st, ADMV1013_REG_LO_AMP_I,
362 ADMV1013_MIXER_VGATE_MSK,
363 FIELD_PREP(ADMV1013_MIXER_VGATE_MSK, mixer_vgate));
364 }
365
admv1013_reg_access(struct iio_dev * indio_dev,unsigned int reg,unsigned int write_val,unsigned int * read_val)366 static int admv1013_reg_access(struct iio_dev *indio_dev,
367 unsigned int reg,
368 unsigned int write_val,
369 unsigned int *read_val)
370 {
371 struct admv1013_state *st = iio_priv(indio_dev);
372
373 if (read_val)
374 return admv1013_spi_read(st, reg, read_val);
375 else
376 return admv1013_spi_write(st, reg, write_val);
377 }
378
379 static const struct iio_info admv1013_info = {
380 .read_raw = admv1013_read_raw,
381 .write_raw = admv1013_write_raw,
382 .debugfs_reg_access = &admv1013_reg_access,
383 };
384
admv1013_freq_change(struct notifier_block * nb,unsigned long action,void * data)385 static int admv1013_freq_change(struct notifier_block *nb, unsigned long action, void *data)
386 {
387 struct admv1013_state *st = container_of(nb, struct admv1013_state, nb);
388 int ret;
389
390 if (action == POST_RATE_CHANGE) {
391 mutex_lock(&st->lock);
392 ret = notifier_from_errno(admv1013_update_quad_filters(st));
393 mutex_unlock(&st->lock);
394 return ret;
395 }
396
397 return NOTIFY_OK;
398 }
399
400 #define _ADMV1013_EXT_INFO(_name, _shared, _ident) { \
401 .name = _name, \
402 .read = admv1013_read, \
403 .write = admv1013_write, \
404 .private = _ident, \
405 .shared = _shared, \
406 }
407
408 static const struct iio_chan_spec_ext_info admv1013_ext_info[] = {
409 _ADMV1013_EXT_INFO("i_calibphase", IIO_SEPARATE, ADMV1013_RFMOD_I_CALIBPHASE),
410 _ADMV1013_EXT_INFO("q_calibphase", IIO_SEPARATE, ADMV1013_RFMOD_Q_CALIBPHASE),
411 { },
412 };
413
414 #define ADMV1013_CHAN_PHASE(_channel, _channel2, _admv1013_ext_info) { \
415 .type = IIO_ALTVOLTAGE, \
416 .output = 0, \
417 .indexed = 1, \
418 .channel2 = _channel2, \
419 .channel = _channel, \
420 .differential = 1, \
421 .ext_info = _admv1013_ext_info, \
422 }
423
424 #define ADMV1013_CHAN_CALIB(_channel, rf_comp) { \
425 .type = IIO_ALTVOLTAGE, \
426 .output = 0, \
427 .indexed = 1, \
428 .channel = _channel, \
429 .channel2 = IIO_MOD_##rf_comp, \
430 .info_mask_separate = BIT(IIO_CHAN_INFO_CALIBBIAS), \
431 }
432
433 static const struct iio_chan_spec admv1013_channels[] = {
434 ADMV1013_CHAN_PHASE(0, 1, admv1013_ext_info),
435 ADMV1013_CHAN_CALIB(0, I),
436 ADMV1013_CHAN_CALIB(0, Q),
437 ADMV1013_CHAN_CALIB(1, I),
438 ADMV1013_CHAN_CALIB(1, Q),
439 };
440
admv1013_init(struct admv1013_state * st)441 static int admv1013_init(struct admv1013_state *st)
442 {
443 int ret;
444 unsigned int data;
445 struct spi_device *spi = st->spi;
446
447 /* Perform a software reset */
448 ret = __admv1013_spi_update_bits(st, ADMV1013_REG_SPI_CONTROL,
449 ADMV1013_SPI_SOFT_RESET_MSK,
450 FIELD_PREP(ADMV1013_SPI_SOFT_RESET_MSK, 1));
451 if (ret)
452 return ret;
453
454 ret = __admv1013_spi_update_bits(st, ADMV1013_REG_SPI_CONTROL,
455 ADMV1013_SPI_SOFT_RESET_MSK,
456 FIELD_PREP(ADMV1013_SPI_SOFT_RESET_MSK, 0));
457 if (ret)
458 return ret;
459
460 ret = __admv1013_spi_read(st, ADMV1013_REG_SPI_CONTROL, &data);
461 if (ret)
462 return ret;
463
464 data = FIELD_GET(ADMV1013_CHIP_ID_MSK, data);
465 if (data != ADMV1013_CHIP_ID) {
466 dev_err(&spi->dev, "Invalid Chip ID.\n");
467 return -EINVAL;
468 }
469
470 ret = __admv1013_spi_write(st, ADMV1013_REG_VVA_TEMP_COMP, 0xE700);
471 if (ret)
472 return ret;
473
474 data = FIELD_PREP(ADMV1013_QUAD_SE_MODE_MSK, st->quad_se_mode);
475
476 ret = __admv1013_spi_update_bits(st, ADMV1013_REG_QUAD,
477 ADMV1013_QUAD_SE_MODE_MSK, data);
478 if (ret)
479 return ret;
480
481 ret = admv1013_update_mixer_vgate(st);
482 if (ret)
483 return ret;
484
485 ret = admv1013_update_quad_filters(st);
486 if (ret)
487 return ret;
488
489 return __admv1013_spi_update_bits(st, ADMV1013_REG_ENABLE,
490 ADMV1013_DET_EN_MSK |
491 ADMV1013_MIXER_IF_EN_MSK,
492 st->det_en |
493 st->input_mode);
494 }
495
admv1013_clk_disable(void * data)496 static void admv1013_clk_disable(void *data)
497 {
498 clk_disable_unprepare(data);
499 }
500
admv1013_reg_disable(void * data)501 static void admv1013_reg_disable(void *data)
502 {
503 regulator_disable(data);
504 }
505
admv1013_powerdown(void * data)506 static void admv1013_powerdown(void *data)
507 {
508 unsigned int enable_reg, enable_reg_msk;
509
510 /* Disable all components in the Enable Register */
511 enable_reg_msk = ADMV1013_VGA_PD_MSK |
512 ADMV1013_MIXER_PD_MSK |
513 ADMV1013_QUAD_PD_MSK |
514 ADMV1013_BG_PD_MSK |
515 ADMV1013_MIXER_IF_EN_MSK |
516 ADMV1013_DET_EN_MSK;
517
518 enable_reg = FIELD_PREP(ADMV1013_VGA_PD_MSK, 1) |
519 FIELD_PREP(ADMV1013_MIXER_PD_MSK, 1) |
520 FIELD_PREP(ADMV1013_QUAD_PD_MSK, 7) |
521 FIELD_PREP(ADMV1013_BG_PD_MSK, 1) |
522 FIELD_PREP(ADMV1013_MIXER_IF_EN_MSK, 0) |
523 FIELD_PREP(ADMV1013_DET_EN_MSK, 0);
524
525 admv1013_spi_update_bits(data, ADMV1013_REG_ENABLE, enable_reg_msk, enable_reg);
526 }
527
admv1013_properties_parse(struct admv1013_state * st)528 static int admv1013_properties_parse(struct admv1013_state *st)
529 {
530 int ret;
531 const char *str;
532 struct spi_device *spi = st->spi;
533
534 st->det_en = device_property_read_bool(&spi->dev, "adi,detector-enable");
535
536 ret = device_property_read_string(&spi->dev, "adi,input-mode", &str);
537 if (ret)
538 st->input_mode = ADMV1013_IQ_MODE;
539
540 if (!strcmp(str, "iq"))
541 st->input_mode = ADMV1013_IQ_MODE;
542 else if (!strcmp(str, "if"))
543 st->input_mode = ADMV1013_IF_MODE;
544 else
545 return -EINVAL;
546
547 ret = device_property_read_string(&spi->dev, "adi,quad-se-mode", &str);
548 if (ret)
549 st->quad_se_mode = ADMV1013_SE_MODE_DIFF;
550
551 if (!strcmp(str, "diff"))
552 st->quad_se_mode = ADMV1013_SE_MODE_DIFF;
553 else if (!strcmp(str, "se-pos"))
554 st->quad_se_mode = ADMV1013_SE_MODE_POS;
555 else if (!strcmp(str, "se-neg"))
556 st->quad_se_mode = ADMV1013_SE_MODE_NEG;
557 else
558 return -EINVAL;
559
560 st->reg = devm_regulator_get(&spi->dev, "vcm");
561 if (IS_ERR(st->reg))
562 return dev_err_probe(&spi->dev, PTR_ERR(st->reg),
563 "failed to get the common-mode voltage\n");
564
565 st->clkin = devm_clk_get(&spi->dev, "lo_in");
566 if (IS_ERR(st->clkin))
567 return dev_err_probe(&spi->dev, PTR_ERR(st->clkin),
568 "failed to get the LO input clock\n");
569
570 return 0;
571 }
572
admv1013_probe(struct spi_device * spi)573 static int admv1013_probe(struct spi_device *spi)
574 {
575 struct iio_dev *indio_dev;
576 struct admv1013_state *st;
577 int ret;
578
579 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
580 if (!indio_dev)
581 return -ENOMEM;
582
583 st = iio_priv(indio_dev);
584
585 indio_dev->info = &admv1013_info;
586 indio_dev->name = "admv1013";
587 indio_dev->channels = admv1013_channels;
588 indio_dev->num_channels = ARRAY_SIZE(admv1013_channels);
589
590 st->spi = spi;
591
592 ret = admv1013_properties_parse(st);
593 if (ret)
594 return ret;
595
596 ret = regulator_enable(st->reg);
597 if (ret) {
598 dev_err(&spi->dev, "Failed to enable specified Common-Mode Voltage!\n");
599 return ret;
600 }
601
602 ret = devm_add_action_or_reset(&spi->dev, admv1013_reg_disable,
603 st->reg);
604 if (ret)
605 return ret;
606
607 ret = clk_prepare_enable(st->clkin);
608 if (ret)
609 return ret;
610
611 ret = devm_add_action_or_reset(&spi->dev, admv1013_clk_disable, st->clkin);
612 if (ret)
613 return ret;
614
615 st->nb.notifier_call = admv1013_freq_change;
616 ret = devm_clk_notifier_register(&spi->dev, st->clkin, &st->nb);
617 if (ret)
618 return ret;
619
620 mutex_init(&st->lock);
621
622 ret = admv1013_init(st);
623 if (ret) {
624 dev_err(&spi->dev, "admv1013 init failed\n");
625 return ret;
626 }
627
628 ret = devm_add_action_or_reset(&spi->dev, admv1013_powerdown, st);
629 if (ret)
630 return ret;
631
632 return devm_iio_device_register(&spi->dev, indio_dev);
633 }
634
635 static const struct spi_device_id admv1013_id[] = {
636 { "admv1013", 0 },
637 {}
638 };
639 MODULE_DEVICE_TABLE(spi, admv1013_id);
640
641 static const struct of_device_id admv1013_of_match[] = {
642 { .compatible = "adi,admv1013" },
643 {},
644 };
645 MODULE_DEVICE_TABLE(of, admv1013_of_match);
646
647 static struct spi_driver admv1013_driver = {
648 .driver = {
649 .name = "admv1013",
650 .of_match_table = admv1013_of_match,
651 },
652 .probe = admv1013_probe,
653 .id_table = admv1013_id,
654 };
655 module_spi_driver(admv1013_driver);
656
657 MODULE_AUTHOR("Antoniu Miclaus <antoniu.miclaus@analog.com");
658 MODULE_DESCRIPTION("Analog Devices ADMV1013");
659 MODULE_LICENSE("GPL v2");
660