?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
inet: frag: enforce memory limits earlier
[linux/fpc-iii.git] / drivers / iio / frequency / adf4350.c
blobd2d824b446f5242c09fe8bb9ac276ab8f2fe746f
1 /*
2 * ADF4350/ADF4351 SPI Wideband Synthesizer driver
3 *
4 * Copyright 2012-2013 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/sysfs.h>
13 #include <linux/spi/spi.h>
14 #include <linux/regulator/consumer.h>
15 #include <linux/err.h>
16 #include <linux/module.h>
17 #include <linux/gcd.h>
18 #include <linux/gpio.h>
19 #include <asm/div64.h>
20 #include <linux/clk.h>
21 #include <linux/of.h>
22 #include <linux/of_gpio.h>
23
24 #include <linux/iio/iio.h>
25 #include <linux/iio/sysfs.h>
26 #include <linux/iio/frequency/adf4350.h>
27
28 enum {
29 ADF4350_FREQ,
30 ADF4350_FREQ_REFIN,
31 ADF4350_FREQ_RESOLUTION,
32 ADF4350_PWRDOWN,
33 };
34
35 struct adf4350_state {
36 struct spi_device *spi;
37 struct regulator *reg;
38 struct adf4350_platform_data *pdata;
39 struct clk *clk;
40 unsigned long clkin;
41 unsigned long chspc; /* Channel Spacing */
42 unsigned long fpfd; /* Phase Frequency Detector */
43 unsigned long min_out_freq;
44 unsigned r0_fract;
45 unsigned r0_int;
46 unsigned r1_mod;
47 unsigned r4_rf_div_sel;
48 unsigned long regs[6];
49 unsigned long regs_hw[6];
50 unsigned long long freq_req;
51 /*
52 * DMA (thus cache coherency maintenance) requires the
53 * transfer buffers to live in their own cache lines.
54 */
55 __be32 val ____cacheline_aligned;
56 };
57
58 static struct adf4350_platform_data default_pdata = {
59 .channel_spacing = 10000,
60 .r2_user_settings = ADF4350_REG2_PD_POLARITY_POS |
61 ADF4350_REG2_CHARGE_PUMP_CURR_uA(2500),
62 .r3_user_settings = ADF4350_REG3_12BIT_CLKDIV_MODE(0),
63 .r4_user_settings = ADF4350_REG4_OUTPUT_PWR(3) |
64 ADF4350_REG4_MUTE_TILL_LOCK_EN,
65 .gpio_lock_detect = -1,
66 };
67
68 static int adf4350_sync_config(struct adf4350_state *st)
69 {
70 int ret, i, doublebuf = 0;
71
72 for (i = ADF4350_REG5; i >= ADF4350_REG0; i--) {
73 if ((st->regs_hw[i] != st->regs[i]) ||
74 ((i == ADF4350_REG0) && doublebuf)) {
75 switch (i) {
76 case ADF4350_REG1:
77 case ADF4350_REG4:
78 doublebuf = 1;
79 break;
80 }
81
82 st->val = cpu_to_be32(st->regs[i] | i);
83 ret = spi_write(st->spi, &st->val, 4);
84 if (ret < 0)
85 return ret;
86 st->regs_hw[i] = st->regs[i];
87 dev_dbg(&st->spi->dev, "[%d] 0x%X\n",
88 i, (u32)st->regs[i] | i);
89 }
90 }
91 return 0;
92 }
93
94 static int adf4350_reg_access(struct iio_dev *indio_dev,
95 unsigned reg, unsigned writeval,
96 unsigned *readval)
97 {
98 struct adf4350_state *st = iio_priv(indio_dev);
99 int ret;
100
101 if (reg > ADF4350_REG5)
102 return -EINVAL;
103
104 mutex_lock(&indio_dev->mlock);
105 if (readval == NULL) {
106 st->regs[reg] = writeval & ~(BIT(0) | BIT(1) | BIT(2));
107 ret = adf4350_sync_config(st);
108 } else {
109 *readval = st->regs_hw[reg];
110 ret = 0;
111 }
112 mutex_unlock(&indio_dev->mlock);
113
114 return ret;
115 }
116
117 static int adf4350_tune_r_cnt(struct adf4350_state *st, unsigned short r_cnt)
118 {
119 struct adf4350_platform_data *pdata = st->pdata;
120
121 do {
122 r_cnt++;
123 st->fpfd = (st->clkin * (pdata->ref_doubler_en ? 2 : 1)) /
124 (r_cnt * (pdata->ref_div2_en ? 2 : 1));
125 } while (st->fpfd > ADF4350_MAX_FREQ_PFD);
126
127 return r_cnt;
128 }
129
130 static int adf4350_set_freq(struct adf4350_state *st, unsigned long long freq)
131 {
132 struct adf4350_platform_data *pdata = st->pdata;
133 u64 tmp;
134 u32 div_gcd, prescaler, chspc;
135 u16 mdiv, r_cnt = 0;
136 u8 band_sel_div;
137
138 if (freq > ADF4350_MAX_OUT_FREQ || freq < st->min_out_freq)
139 return -EINVAL;
140
141 if (freq > ADF4350_MAX_FREQ_45_PRESC) {
142 prescaler = ADF4350_REG1_PRESCALER;
143 mdiv = 75;
144 } else {
145 prescaler = 0;
146 mdiv = 23;
147 }
148
149 st->r4_rf_div_sel = 0;
150
151 while (freq < ADF4350_MIN_VCO_FREQ) {
152 freq <<= 1;
153 st->r4_rf_div_sel++;
154 }
155
156 /*
157 * Allow a predefined reference division factor
158 * if not set, compute our own
159 */
160 if (pdata->ref_div_factor)
161 r_cnt = pdata->ref_div_factor - 1;
162
163 chspc = st->chspc;
164
165 do {
166 do {
167 do {
168 r_cnt = adf4350_tune_r_cnt(st, r_cnt);
169 st->r1_mod = st->fpfd / chspc;
170 if (r_cnt > ADF4350_MAX_R_CNT) {
171 /* try higher spacing values */
172 chspc++;
173 r_cnt = 0;
174 }
175 } while ((st->r1_mod > ADF4350_MAX_MODULUS) && r_cnt);
176 } while (r_cnt == 0);
177
178 tmp = freq * (u64)st->r1_mod + (st->fpfd >> 1);
179 do_div(tmp, st->fpfd); /* Div round closest (n + d/2)/d */
180 st->r0_fract = do_div(tmp, st->r1_mod);
181 st->r0_int = tmp;
182 } while (mdiv > st->r0_int);
183
184 band_sel_div = DIV_ROUND_UP(st->fpfd, ADF4350_MAX_BANDSEL_CLK);
185
186 if (st->r0_fract && st->r1_mod) {
187 div_gcd = gcd(st->r1_mod, st->r0_fract);
188 st->r1_mod /= div_gcd;
189 st->r0_fract /= div_gcd;
190 } else {
191 st->r0_fract = 0;
192 st->r1_mod = 1;
193 }
194
195 dev_dbg(&st->spi->dev, "VCO: %llu Hz, PFD %lu Hz\n"
196 "REF_DIV %d, R0_INT %d, R0_FRACT %d\n"
197 "R1_MOD %d, RF_DIV %d\nPRESCALER %s, BAND_SEL_DIV %d\n",
198 freq, st->fpfd, r_cnt, st->r0_int, st->r0_fract, st->r1_mod,
199 1 << st->r4_rf_div_sel, prescaler ? "8/9" : "4/5",
200 band_sel_div);
201
202 st->regs[ADF4350_REG0] = ADF4350_REG0_INT(st->r0_int) |
203 ADF4350_REG0_FRACT(st->r0_fract);
204
205 st->regs[ADF4350_REG1] = ADF4350_REG1_PHASE(1) |
206 ADF4350_REG1_MOD(st->r1_mod) |
207 prescaler;
208
209 st->regs[ADF4350_REG2] =
210 ADF4350_REG2_10BIT_R_CNT(r_cnt) |
211 ADF4350_REG2_DOUBLE_BUFF_EN |
212 (pdata->ref_doubler_en ? ADF4350_REG2_RMULT2_EN : 0) |
213 (pdata->ref_div2_en ? ADF4350_REG2_RDIV2_EN : 0) |
214 (pdata->r2_user_settings & (ADF4350_REG2_PD_POLARITY_POS |
215 ADF4350_REG2_LDP_6ns | ADF4350_REG2_LDF_INT_N |
216 ADF4350_REG2_CHARGE_PUMP_CURR_uA(5000) |
217 ADF4350_REG2_MUXOUT(0x7) | ADF4350_REG2_NOISE_MODE(0x3)));
218
219 st->regs[ADF4350_REG3] = pdata->r3_user_settings &
220 (ADF4350_REG3_12BIT_CLKDIV(0xFFF) |
221 ADF4350_REG3_12BIT_CLKDIV_MODE(0x3) |
222 ADF4350_REG3_12BIT_CSR_EN |
223 ADF4351_REG3_CHARGE_CANCELLATION_EN |
224 ADF4351_REG3_ANTI_BACKLASH_3ns_EN |
225 ADF4351_REG3_BAND_SEL_CLOCK_MODE_HIGH);
226
227 st->regs[ADF4350_REG4] =
228 ADF4350_REG4_FEEDBACK_FUND |
229 ADF4350_REG4_RF_DIV_SEL(st->r4_rf_div_sel) |
230 ADF4350_REG4_8BIT_BAND_SEL_CLKDIV(band_sel_div) |
231 ADF4350_REG4_RF_OUT_EN |
232 (pdata->r4_user_settings &
233 (ADF4350_REG4_OUTPUT_PWR(0x3) |
234 ADF4350_REG4_AUX_OUTPUT_PWR(0x3) |
235 ADF4350_REG4_AUX_OUTPUT_EN |
236 ADF4350_REG4_AUX_OUTPUT_FUND |
237 ADF4350_REG4_MUTE_TILL_LOCK_EN));
238
239 st->regs[ADF4350_REG5] = ADF4350_REG5_LD_PIN_MODE_DIGITAL;
240 st->freq_req = freq;
241
242 return adf4350_sync_config(st);
243 }
244
245 static ssize_t adf4350_write(struct iio_dev *indio_dev,
246 uintptr_t private,
247 const struct iio_chan_spec *chan,
248 const char *buf, size_t len)
249 {
250 struct adf4350_state *st = iio_priv(indio_dev);
251 unsigned long long readin;
252 unsigned long tmp;
253 int ret;
254
255 ret = kstrtoull(buf, 10, &readin);
256 if (ret)
257 return ret;
258
259 mutex_lock(&indio_dev->mlock);
260 switch ((u32)private) {
261 case ADF4350_FREQ:
262 ret = adf4350_set_freq(st, readin);
263 break;
264 case ADF4350_FREQ_REFIN:
265 if (readin > ADF4350_MAX_FREQ_REFIN) {
266 ret = -EINVAL;
267 break;
268 }
269
270 if (st->clk) {
271 tmp = clk_round_rate(st->clk, readin);
272 if (tmp != readin) {
273 ret = -EINVAL;
274 break;
275 }
276 ret = clk_set_rate(st->clk, tmp);
277 if (ret < 0)
278 break;
279 }
280 st->clkin = readin;
281 ret = adf4350_set_freq(st, st->freq_req);
282 break;
283 case ADF4350_FREQ_RESOLUTION:
284 if (readin == 0)
285 ret = -EINVAL;
286 else
287 st->chspc = readin;
288 break;
289 case ADF4350_PWRDOWN:
290 if (readin)
291 st->regs[ADF4350_REG2] |= ADF4350_REG2_POWER_DOWN_EN;
292 else
293 st->regs[ADF4350_REG2] &= ~ADF4350_REG2_POWER_DOWN_EN;
294
295 adf4350_sync_config(st);
296 break;
297 default:
298 ret = -EINVAL;
299 }
300 mutex_unlock(&indio_dev->mlock);
301
302 return ret ? ret : len;
303 }
304
305 static ssize_t adf4350_read(struct iio_dev *indio_dev,
306 uintptr_t private,
307 const struct iio_chan_spec *chan,
308 char *buf)
309 {
310 struct adf4350_state *st = iio_priv(indio_dev);
311 unsigned long long val;
312 int ret = 0;
313
314 mutex_lock(&indio_dev->mlock);
315 switch ((u32)private) {
316 case ADF4350_FREQ:
317 val = (u64)((st->r0_int * st->r1_mod) + st->r0_fract) *
318 (u64)st->fpfd;
319 do_div(val, st->r1_mod * (1 << st->r4_rf_div_sel));
320 /* PLL unlocked? return error */
321 if (gpio_is_valid(st->pdata->gpio_lock_detect))
322 if (!gpio_get_value(st->pdata->gpio_lock_detect)) {
323 dev_dbg(&st->spi->dev, "PLL un-locked\n");
324 ret = -EBUSY;
325 }
326 break;
327 case ADF4350_FREQ_REFIN:
328 if (st->clk)
329 st->clkin = clk_get_rate(st->clk);
330
331 val = st->clkin;
332 break;
333 case ADF4350_FREQ_RESOLUTION:
334 val = st->chspc;
335 break;
336 case ADF4350_PWRDOWN:
337 val = !!(st->regs[ADF4350_REG2] & ADF4350_REG2_POWER_DOWN_EN);
338 break;
339 default:
340 ret = -EINVAL;
341 val = 0;
342 }
343 mutex_unlock(&indio_dev->mlock);
344
345 return ret < 0 ? ret : sprintf(buf, "%llu\n", val);
346 }
347
348 #define _ADF4350_EXT_INFO(_name, _ident) { \
349 .name = _name, \
350 .read = adf4350_read, \
351 .write = adf4350_write, \
352 .private = _ident, \
353 .shared = IIO_SEPARATE, \
354 }
355
356 static const struct iio_chan_spec_ext_info adf4350_ext_info[] = {
357 /* Ideally we use IIO_CHAN_INFO_FREQUENCY, but there are
358 * values > 2^32 in order to support the entire frequency range
359 * in Hz. Using scale is a bit ugly.
360 */
361 _ADF4350_EXT_INFO("frequency", ADF4350_FREQ),
362 _ADF4350_EXT_INFO("frequency_resolution", ADF4350_FREQ_RESOLUTION),
363 _ADF4350_EXT_INFO("refin_frequency", ADF4350_FREQ_REFIN),
364 _ADF4350_EXT_INFO("powerdown", ADF4350_PWRDOWN),
365 { },
366 };
367
368 static const struct iio_chan_spec adf4350_chan = {
369 .type = IIO_ALTVOLTAGE,
370 .indexed = 1,
371 .output = 1,
372 .ext_info = adf4350_ext_info,
373 };
374
375 static const struct iio_info adf4350_info = {
376 .debugfs_reg_access = &adf4350_reg_access,
377 .driver_module = THIS_MODULE,
378 };
379
380 #ifdef CONFIG_OF
381 static struct adf4350_platform_data *adf4350_parse_dt(struct device *dev)
382 {
383 struct device_node *np = dev->of_node;
384 struct adf4350_platform_data *pdata;
385 unsigned int tmp;
386 int ret;
387
388 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
389 if (!pdata)
390 return NULL;
391
392 strncpy(&pdata->name[0], np->name, SPI_NAME_SIZE - 1);
393
394 tmp = 10000;
395 of_property_read_u32(np, "adi,channel-spacing", &tmp);
396 pdata->channel_spacing = tmp;
397
398 tmp = 0;
399 of_property_read_u32(np, "adi,power-up-frequency", &tmp);
400 pdata->power_up_frequency = tmp;
401
402 tmp = 0;
403 of_property_read_u32(np, "adi,reference-div-factor", &tmp);
404 pdata->ref_div_factor = tmp;
405
406 ret = of_get_gpio(np, 0);
407 if (ret < 0)
408 pdata->gpio_lock_detect = -1;
409 else
410 pdata->gpio_lock_detect = ret;
411
412 pdata->ref_doubler_en = of_property_read_bool(np,
413 "adi,reference-doubler-enable");
414 pdata->ref_div2_en = of_property_read_bool(np,
415 "adi,reference-div2-enable");
416
417 /* r2_user_settings */
418 pdata->r2_user_settings = of_property_read_bool(np,
419 "adi,phase-detector-polarity-positive-enable") ?
420 ADF4350_REG2_PD_POLARITY_POS : 0;
421 pdata->r2_user_settings |= of_property_read_bool(np,
422 "adi,lock-detect-precision-6ns-enable") ?
423 ADF4350_REG2_LDP_6ns : 0;
424 pdata->r2_user_settings |= of_property_read_bool(np,
425 "adi,lock-detect-function-integer-n-enable") ?
426 ADF4350_REG2_LDF_INT_N : 0;
427
428 tmp = 2500;
429 of_property_read_u32(np, "adi,charge-pump-current", &tmp);
430 pdata->r2_user_settings |= ADF4350_REG2_CHARGE_PUMP_CURR_uA(tmp);
431
432 tmp = 0;
433 of_property_read_u32(np, "adi,muxout-select", &tmp);
434 pdata->r2_user_settings |= ADF4350_REG2_MUXOUT(tmp);
435
436 pdata->r2_user_settings |= of_property_read_bool(np,
437 "adi,low-spur-mode-enable") ?
438 ADF4350_REG2_NOISE_MODE(0x3) : 0;
439
440 /* r3_user_settings */
441
442 pdata->r3_user_settings = of_property_read_bool(np,
443 "adi,cycle-slip-reduction-enable") ?
444 ADF4350_REG3_12BIT_CSR_EN : 0;
445 pdata->r3_user_settings |= of_property_read_bool(np,
446 "adi,charge-cancellation-enable") ?
447 ADF4351_REG3_CHARGE_CANCELLATION_EN : 0;
448
449 pdata->r3_user_settings |= of_property_read_bool(np,
450 "adi,anti-backlash-3ns-enable") ?
451 ADF4351_REG3_ANTI_BACKLASH_3ns_EN : 0;
452 pdata->r3_user_settings |= of_property_read_bool(np,
453 "adi,band-select-clock-mode-high-enable") ?
454 ADF4351_REG3_BAND_SEL_CLOCK_MODE_HIGH : 0;
455
456 tmp = 0;
457 of_property_read_u32(np, "adi,12bit-clk-divider", &tmp);
458 pdata->r3_user_settings |= ADF4350_REG3_12BIT_CLKDIV(tmp);
459
460 tmp = 0;
461 of_property_read_u32(np, "adi,clk-divider-mode", &tmp);
462 pdata->r3_user_settings |= ADF4350_REG3_12BIT_CLKDIV_MODE(tmp);
463
464 /* r4_user_settings */
465
466 pdata->r4_user_settings = of_property_read_bool(np,
467 "adi,aux-output-enable") ?
468 ADF4350_REG4_AUX_OUTPUT_EN : 0;
469 pdata->r4_user_settings |= of_property_read_bool(np,
470 "adi,aux-output-fundamental-enable") ?
471 ADF4350_REG4_AUX_OUTPUT_FUND : 0;
472 pdata->r4_user_settings |= of_property_read_bool(np,
473 "adi,mute-till-lock-enable") ?
474 ADF4350_REG4_MUTE_TILL_LOCK_EN : 0;
475
476 tmp = 0;
477 of_property_read_u32(np, "adi,output-power", &tmp);
478 pdata->r4_user_settings |= ADF4350_REG4_OUTPUT_PWR(tmp);
479
480 tmp = 0;
481 of_property_read_u32(np, "adi,aux-output-power", &tmp);
482 pdata->r4_user_settings |= ADF4350_REG4_AUX_OUTPUT_PWR(tmp);
483
484 return pdata;
485 }
486 #else
487 static
488 struct adf4350_platform_data *adf4350_parse_dt(struct device *dev)
489 {
490 return NULL;
491 }
492 #endif
493
494 static int adf4350_probe(struct spi_device *spi)
495 {
496 struct adf4350_platform_data *pdata;
497 struct iio_dev *indio_dev;
498 struct adf4350_state *st;
499 struct clk *clk = NULL;
500 int ret;
501
502 if (spi->dev.of_node) {
503 pdata = adf4350_parse_dt(&spi->dev);
504 if (pdata == NULL)
505 return -EINVAL;
506 } else {
507 pdata = spi->dev.platform_data;
508 }
509
510 if (!pdata) {
511 dev_warn(&spi->dev, "no platform data? using default\n");
512 pdata = &default_pdata;
513 }
514
515 if (!pdata->clkin) {
516 clk = devm_clk_get(&spi->dev, "clkin");
517 if (IS_ERR(clk))
518 return -EPROBE_DEFER;
519
520 ret = clk_prepare_enable(clk);
521 if (ret < 0)
522 return ret;
523 }
524
525 indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
526 if (indio_dev == NULL) {
527 ret = -ENOMEM;
528 goto error_disable_clk;
529 }
530
531 st = iio_priv(indio_dev);
532
533 st->reg = devm_regulator_get(&spi->dev, "vcc");
534 if (!IS_ERR(st->reg)) {
535 ret = regulator_enable(st->reg);
536 if (ret)
537 goto error_disable_clk;
538 }
539
540 spi_set_drvdata(spi, indio_dev);
541 st->spi = spi;
542 st->pdata = pdata;
543
544 indio_dev->dev.parent = &spi->dev;
545 indio_dev->name = (pdata->name[0] != 0) ? pdata->name :
546 spi_get_device_id(spi)->name;
547
548 indio_dev->info = &adf4350_info;
549 indio_dev->modes = INDIO_DIRECT_MODE;
550 indio_dev->channels = &adf4350_chan;
551 indio_dev->num_channels = 1;
552
553 st->chspc = pdata->channel_spacing;
554 if (clk) {
555 st->clk = clk;
556 st->clkin = clk_get_rate(clk);
557 } else {
558 st->clkin = pdata->clkin;
559 }
560
561 st->min_out_freq = spi_get_device_id(spi)->driver_data == 4351 ?
562 ADF4351_MIN_OUT_FREQ : ADF4350_MIN_OUT_FREQ;
563
564 memset(st->regs_hw, 0xFF, sizeof(st->regs_hw));
565
566 if (gpio_is_valid(pdata->gpio_lock_detect)) {
567 ret = devm_gpio_request(&spi->dev, pdata->gpio_lock_detect,
568 indio_dev->name);
569 if (ret) {
570 dev_err(&spi->dev, "fail to request lock detect GPIO-%d",
571 pdata->gpio_lock_detect);
572 goto error_disable_reg;
573 }
574 gpio_direction_input(pdata->gpio_lock_detect);
575 }
576
577 if (pdata->power_up_frequency) {
578 ret = adf4350_set_freq(st, pdata->power_up_frequency);
579 if (ret)
580 goto error_disable_reg;
581 }
582
583 ret = iio_device_register(indio_dev);
584 if (ret)
585 goto error_disable_reg;
586
587 return 0;
588
589 error_disable_reg:
590 if (!IS_ERR(st->reg))
591 regulator_disable(st->reg);
592 error_disable_clk:
593 if (clk)
594 clk_disable_unprepare(clk);
595
596 return ret;
597 }
598
599 static int adf4350_remove(struct spi_device *spi)
600 {
601 struct iio_dev *indio_dev = spi_get_drvdata(spi);
602 struct adf4350_state *st = iio_priv(indio_dev);
603 struct regulator *reg = st->reg;
604
605 st->regs[ADF4350_REG2] |= ADF4350_REG2_POWER_DOWN_EN;
606 adf4350_sync_config(st);
607
608 iio_device_unregister(indio_dev);
609
610 if (st->clk)
611 clk_disable_unprepare(st->clk);
612
613 if (!IS_ERR(reg))
614 regulator_disable(reg);
615
616 return 0;
617 }
618
619 static const struct of_device_id adf4350_of_match[] = {
620 { .compatible = "adi,adf4350", },
621 { .compatible = "adi,adf4351", },
622 { /* sentinel */ },
623 };
624 MODULE_DEVICE_TABLE(of, adf4350_of_match);
625
626 static const struct spi_device_id adf4350_id[] = {
627 {"adf4350", 4350},
628 {"adf4351", 4351},
629 {}
630 };
631 MODULE_DEVICE_TABLE(spi, adf4350_id);
632
633 static struct spi_driver adf4350_driver = {
634 .driver = {
635 .name = "adf4350",
636 .of_match_table = of_match_ptr(adf4350_of_match),
637 },
638 .probe = adf4350_probe,
639 .remove = adf4350_remove,
640 .id_table = adf4350_id,
641 };
642 module_spi_driver(adf4350_driver);
643
644 MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
645 MODULE_DESCRIPTION("Analog Devices ADF4350/ADF4351 PLL");
646 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support