1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // FAN53555 Fairchild Digitally Programmable TinyBuck Regulator Driver.
4 //
5 // Supported Part Numbers:
6 // FAN53555UC00X/01X/03X/04X/05X
7 //
8 // Copyright (c) 2012 Marvell Technology Ltd.
9 // Yunfan Zhang <yfzhang@marvell.com>
10
11 #include <linux/module.h>
12 #include <linux/param.h>
13 #include <linux/err.h>
14 #include <linux/platform_device.h>
15 #include <linux/regulator/driver.h>
16 #include <linux/regulator/machine.h>
17 #include <linux/regulator/of_regulator.h>
18 #include <linux/of_device.h>
19 #include <linux/i2c.h>
20 #include <linux/slab.h>
21 #include <linux/regmap.h>
22 #include <linux/regulator/fan53555.h>
23
24 /* Voltage setting */
25 #define FAN53555_VSEL0 0x00
26 #define FAN53555_VSEL1 0x01
27
28 #define TCS4525_VSEL0 0x11
29 #define TCS4525_VSEL1 0x10
30 #define TCS4525_TIME 0x13
31 #define TCS4525_COMMAND 0x14
32
33 /* Control register */
34 #define FAN53555_CONTROL 0x02
35 /* IC Type */
36 #define FAN53555_ID1 0x03
37 /* IC mask version */
38 #define FAN53555_ID2 0x04
39 /* Monitor register */
40 #define FAN53555_MONITOR 0x05
41
42 /* VSEL bit definitions */
43 #define VSEL_BUCK_EN (1 << 7)
44 #define VSEL_MODE (1 << 6)
45 /* Chip ID and Verison */
46 #define DIE_ID 0x0F /* ID1 */
47 #define DIE_REV 0x0F /* ID2 */
48 /* Control bit definitions */
49 #define CTL_OUTPUT_DISCHG (1 << 7)
50 #define CTL_SLEW_MASK (0x7 << 4)
51 #define CTL_SLEW_SHIFT 4
52 #define CTL_RESET (1 << 2)
53 #define CTL_MODE_VSEL0_MODE BIT(0)
54 #define CTL_MODE_VSEL1_MODE BIT(1)
55
56 #define FAN53555_NVOLTAGES 64 /* Numbers of voltages */
57 #define FAN53526_NVOLTAGES 128
58 #define TCS4525_NVOLTAGES 127 /* Numbers of voltages */
59
60 #define TCS_VSEL_NSEL_MASK 0x7f
61 #define TCS_VSEL0_MODE (1 << 7)
62 #define TCS_VSEL1_MODE (1 << 6)
63
64 #define TCS_SLEW_SHIFT 3
65 #define TCS_SLEW_MASK (0x3 < 3)
66
67 enum fan53555_vendor {
68 FAN53526_VENDOR_FAIRCHILD = 0,
69 FAN53555_VENDOR_FAIRCHILD,
70 FAN53555_VENDOR_SILERGY,
71 FAN53555_VENDOR_TCS,
72 };
73
74 enum {
75 FAN53526_CHIP_ID_01 = 1,
76 };
77
78 enum {
79 FAN53526_CHIP_REV_08 = 8,
80 };
81
82 /* IC Type */
83 enum {
84 FAN53555_CHIP_ID_00 = 0,
85 FAN53555_CHIP_ID_01,
86 FAN53555_CHIP_ID_02,
87 FAN53555_CHIP_ID_03,
88 FAN53555_CHIP_ID_04,
89 FAN53555_CHIP_ID_05,
90 FAN53555_CHIP_ID_08 = 8,
91 };
92
93 /* IC mask revision */
94 enum {
95 FAN53555_CHIP_REV_00 = 0x3,
96 FAN53555_CHIP_REV_13 = 0xf,
97 };
98
99 enum {
100 SILERGY_SYR82X = 8,
101 SILERGY_SYR83X = 9,
102 };
103
104 struct fan53555_device_info {
105 enum fan53555_vendor vendor;
106 struct device *dev;
107 struct regulator_desc desc;
108 struct regulator_init_data *regulator;
109 /* IC Type and Rev */
110 int chip_id;
111 int chip_rev;
112 /* Voltage setting register */
113 unsigned int vol_reg;
114 unsigned int sleep_reg;
115 /* Voltage range and step(linear) */
116 unsigned int vsel_min;
117 unsigned int vsel_step;
118 unsigned int vsel_count;
119 /* Mode */
120 unsigned int mode_reg;
121 unsigned int mode_mask;
122 /* Sleep voltage cache */
123 unsigned int sleep_vol_cache;
124 /* Slew rate */
125 unsigned int slew_reg;
126 unsigned int slew_mask;
127 unsigned int slew_shift;
128 unsigned int slew_rate;
129 };
130
fan53555_set_suspend_voltage(struct regulator_dev * rdev,int uV)131 static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV)
132 {
133 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
134 int ret;
135
136 if (di->sleep_vol_cache == uV)
137 return 0;
138 ret = regulator_map_voltage_linear(rdev, uV, uV);
139 if (ret < 0)
140 return ret;
141 ret = regmap_update_bits(rdev->regmap, di->sleep_reg,
142 di->desc.vsel_mask, ret);
143 if (ret < 0)
144 return ret;
145 /* Cache the sleep voltage setting.
146 * Might not be the real voltage which is rounded */
147 di->sleep_vol_cache = uV;
148
149 return 0;
150 }
151
fan53555_set_suspend_enable(struct regulator_dev * rdev)152 static int fan53555_set_suspend_enable(struct regulator_dev *rdev)
153 {
154 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
155
156 return regmap_update_bits(rdev->regmap, di->sleep_reg,
157 VSEL_BUCK_EN, VSEL_BUCK_EN);
158 }
159
fan53555_set_suspend_disable(struct regulator_dev * rdev)160 static int fan53555_set_suspend_disable(struct regulator_dev *rdev)
161 {
162 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
163
164 return regmap_update_bits(rdev->regmap, di->sleep_reg,
165 VSEL_BUCK_EN, 0);
166 }
167
fan53555_set_mode(struct regulator_dev * rdev,unsigned int mode)168 static int fan53555_set_mode(struct regulator_dev *rdev, unsigned int mode)
169 {
170 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
171
172 switch (mode) {
173 case REGULATOR_MODE_FAST:
174 regmap_update_bits(rdev->regmap, di->mode_reg,
175 di->mode_mask, di->mode_mask);
176 break;
177 case REGULATOR_MODE_NORMAL:
178 regmap_update_bits(rdev->regmap, di->vol_reg, di->mode_mask, 0);
179 break;
180 default:
181 return -EINVAL;
182 }
183 return 0;
184 }
185
fan53555_get_mode(struct regulator_dev * rdev)186 static unsigned int fan53555_get_mode(struct regulator_dev *rdev)
187 {
188 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
189 unsigned int val;
190 int ret = 0;
191
192 ret = regmap_read(rdev->regmap, di->mode_reg, &val);
193 if (ret < 0)
194 return ret;
195 if (val & di->mode_mask)
196 return REGULATOR_MODE_FAST;
197 else
198 return REGULATOR_MODE_NORMAL;
199 }
200
201 static const int slew_rates[] = {
202 64000,
203 32000,
204 16000,
205 8000,
206 4000,
207 2000,
208 1000,
209 500,
210 };
211
212 static const int tcs_slew_rates[] = {
213 18700,
214 9300,
215 4600,
216 2300,
217 };
218
fan53555_set_ramp(struct regulator_dev * rdev,int ramp)219 static int fan53555_set_ramp(struct regulator_dev *rdev, int ramp)
220 {
221 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
222 int regval = -1, i;
223 const int *slew_rate_t;
224 int slew_rate_n;
225
226 switch (di->vendor) {
227 case FAN53526_VENDOR_FAIRCHILD:
228 case FAN53555_VENDOR_FAIRCHILD:
229 case FAN53555_VENDOR_SILERGY:
230 slew_rate_t = slew_rates;
231 slew_rate_n = ARRAY_SIZE(slew_rates);
232 break;
233 case FAN53555_VENDOR_TCS:
234 slew_rate_t = tcs_slew_rates;
235 slew_rate_n = ARRAY_SIZE(tcs_slew_rates);
236 break;
237 default:
238 return -EINVAL;
239 }
240
241 for (i = 0; i < slew_rate_n; i++) {
242 if (ramp <= slew_rate_t[i])
243 regval = i;
244 else
245 break;
246 }
247
248 if (regval < 0) {
249 dev_err(di->dev, "unsupported ramp value %d\n", ramp);
250 return -EINVAL;
251 }
252
253 return regmap_update_bits(rdev->regmap, di->slew_reg,
254 di->slew_mask, regval << di->slew_shift);
255 }
256
257 static const struct regulator_ops fan53555_regulator_ops = {
258 .set_voltage_sel = regulator_set_voltage_sel_regmap,
259 .get_voltage_sel = regulator_get_voltage_sel_regmap,
260 .set_voltage_time_sel = regulator_set_voltage_time_sel,
261 .map_voltage = regulator_map_voltage_linear,
262 .list_voltage = regulator_list_voltage_linear,
263 .set_suspend_voltage = fan53555_set_suspend_voltage,
264 .enable = regulator_enable_regmap,
265 .disable = regulator_disable_regmap,
266 .is_enabled = regulator_is_enabled_regmap,
267 .set_mode = fan53555_set_mode,
268 .get_mode = fan53555_get_mode,
269 .set_ramp_delay = fan53555_set_ramp,
270 .set_suspend_enable = fan53555_set_suspend_enable,
271 .set_suspend_disable = fan53555_set_suspend_disable,
272 };
273
fan53526_voltages_setup_fairchild(struct fan53555_device_info * di)274 static int fan53526_voltages_setup_fairchild(struct fan53555_device_info *di)
275 {
276 /* Init voltage range and step */
277 switch (di->chip_id) {
278 case FAN53526_CHIP_ID_01:
279 switch (di->chip_rev) {
280 case FAN53526_CHIP_REV_08:
281 di->vsel_min = 600000;
282 di->vsel_step = 6250;
283 break;
284 default:
285 dev_err(di->dev,
286 "Chip ID %d with rev %d not supported!\n",
287 di->chip_id, di->chip_rev);
288 return -EINVAL;
289 }
290 break;
291 default:
292 dev_err(di->dev,
293 "Chip ID %d not supported!\n", di->chip_id);
294 return -EINVAL;
295 }
296
297 di->vsel_count = FAN53526_NVOLTAGES;
298
299 return 0;
300 }
301
fan53555_voltages_setup_fairchild(struct fan53555_device_info * di)302 static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di)
303 {
304 /* Init voltage range and step */
305 switch (di->chip_id) {
306 case FAN53555_CHIP_ID_00:
307 switch (di->chip_rev) {
308 case FAN53555_CHIP_REV_00:
309 di->vsel_min = 600000;
310 di->vsel_step = 10000;
311 break;
312 case FAN53555_CHIP_REV_13:
313 di->vsel_min = 800000;
314 di->vsel_step = 10000;
315 break;
316 default:
317 dev_err(di->dev,
318 "Chip ID %d with rev %d not supported!\n",
319 di->chip_id, di->chip_rev);
320 return -EINVAL;
321 }
322 break;
323 case FAN53555_CHIP_ID_01:
324 case FAN53555_CHIP_ID_03:
325 case FAN53555_CHIP_ID_05:
326 case FAN53555_CHIP_ID_08:
327 di->vsel_min = 600000;
328 di->vsel_step = 10000;
329 break;
330 case FAN53555_CHIP_ID_04:
331 di->vsel_min = 603000;
332 di->vsel_step = 12826;
333 break;
334 default:
335 dev_err(di->dev,
336 "Chip ID %d not supported!\n", di->chip_id);
337 return -EINVAL;
338 }
339 di->slew_reg = FAN53555_CONTROL;
340 di->slew_mask = CTL_SLEW_MASK;
341 di->slew_shift = CTL_SLEW_SHIFT;
342 di->vsel_count = FAN53555_NVOLTAGES;
343
344 return 0;
345 }
346
fan53555_voltages_setup_silergy(struct fan53555_device_info * di)347 static int fan53555_voltages_setup_silergy(struct fan53555_device_info *di)
348 {
349 /* Init voltage range and step */
350 switch (di->chip_id) {
351 case SILERGY_SYR82X:
352 case SILERGY_SYR83X:
353 di->vsel_min = 712500;
354 di->vsel_step = 12500;
355 break;
356 default:
357 dev_err(di->dev,
358 "Chip ID %d not supported!\n", di->chip_id);
359 return -EINVAL;
360 }
361 di->slew_reg = FAN53555_CONTROL;
362 di->slew_reg = FAN53555_CONTROL;
363 di->slew_mask = CTL_SLEW_MASK;
364 di->slew_shift = CTL_SLEW_SHIFT;
365 di->vsel_count = FAN53555_NVOLTAGES;
366
367 return 0;
368 }
369
fan53555_voltages_setup_tcs(struct fan53555_device_info * di)370 static int fan53555_voltages_setup_tcs(struct fan53555_device_info *di)
371 {
372 di->slew_reg = TCS4525_TIME;
373 di->slew_mask = TCS_SLEW_MASK;
374 di->slew_shift = TCS_SLEW_MASK;
375
376 /* Init voltage range and step */
377 di->vsel_min = 600000;
378 di->vsel_step = 6250;
379 di->vsel_count = TCS4525_NVOLTAGES;
380
381 return 0;
382 }
383
384 /* For 00,01,03,05 options:
385 * VOUT = 0.60V + NSELx * 10mV, from 0.60 to 1.23V.
386 * For 04 option:
387 * VOUT = 0.603V + NSELx * 12.826mV, from 0.603 to 1.411V.
388 * */
fan53555_device_setup(struct fan53555_device_info * di,struct fan53555_platform_data * pdata)389 static int fan53555_device_setup(struct fan53555_device_info *di,
390 struct fan53555_platform_data *pdata)
391 {
392 int ret = 0;
393
394 /* Setup voltage control register */
395 switch (di->vendor) {
396 case FAN53526_VENDOR_FAIRCHILD:
397 case FAN53555_VENDOR_FAIRCHILD:
398 case FAN53555_VENDOR_SILERGY:
399 switch (pdata->sleep_vsel_id) {
400 case FAN53555_VSEL_ID_0:
401 di->sleep_reg = FAN53555_VSEL0;
402 di->vol_reg = FAN53555_VSEL1;
403 break;
404 case FAN53555_VSEL_ID_1:
405 di->sleep_reg = FAN53555_VSEL1;
406 di->vol_reg = FAN53555_VSEL0;
407 break;
408 default:
409 dev_err(di->dev, "Invalid VSEL ID!\n");
410 return -EINVAL;
411 }
412 break;
413 case FAN53555_VENDOR_TCS:
414 switch (pdata->sleep_vsel_id) {
415 case FAN53555_VSEL_ID_0:
416 di->sleep_reg = TCS4525_VSEL0;
417 di->vol_reg = TCS4525_VSEL1;
418 break;
419 case FAN53555_VSEL_ID_1:
420 di->sleep_reg = TCS4525_VSEL1;
421 di->vol_reg = TCS4525_VSEL0;
422 break;
423 default:
424 dev_err(di->dev, "Invalid VSEL ID!\n");
425 return -EINVAL;
426 }
427 break;
428 default:
429 dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
430 return -EINVAL;
431 }
432
433 /* Setup mode control register */
434 switch (di->vendor) {
435 case FAN53526_VENDOR_FAIRCHILD:
436 di->mode_reg = FAN53555_CONTROL;
437
438 switch (pdata->sleep_vsel_id) {
439 case FAN53555_VSEL_ID_0:
440 di->mode_mask = CTL_MODE_VSEL1_MODE;
441 break;
442 case FAN53555_VSEL_ID_1:
443 di->mode_mask = CTL_MODE_VSEL0_MODE;
444 break;
445 }
446 break;
447 case FAN53555_VENDOR_FAIRCHILD:
448 case FAN53555_VENDOR_SILERGY:
449 di->mode_reg = di->vol_reg;
450 di->mode_mask = VSEL_MODE;
451 break;
452 case FAN53555_VENDOR_TCS:
453 di->mode_reg = TCS4525_COMMAND;
454
455 switch (pdata->sleep_vsel_id) {
456 case FAN53555_VSEL_ID_0:
457 di->mode_mask = TCS_VSEL1_MODE;
458 break;
459 case FAN53555_VSEL_ID_1:
460 di->mode_mask = TCS_VSEL0_MODE;
461 break;
462 }
463 break;
464 default:
465 dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
466 return -EINVAL;
467 }
468
469 /* Setup voltage range */
470 switch (di->vendor) {
471 case FAN53526_VENDOR_FAIRCHILD:
472 ret = fan53526_voltages_setup_fairchild(di);
473 break;
474 case FAN53555_VENDOR_FAIRCHILD:
475 ret = fan53555_voltages_setup_fairchild(di);
476 break;
477 case FAN53555_VENDOR_SILERGY:
478 ret = fan53555_voltages_setup_silergy(di);
479 break;
480 case FAN53555_VENDOR_TCS:
481 ret = fan53555_voltages_setup_tcs(di);
482 break;
483 default:
484 dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
485 return -EINVAL;
486 }
487
488 return ret;
489 }
490
fan53555_regulator_register(struct fan53555_device_info * di,struct regulator_config * config)491 static int fan53555_regulator_register(struct fan53555_device_info *di,
492 struct regulator_config *config)
493 {
494 struct regulator_desc *rdesc = &di->desc;
495 struct regulator_dev *rdev;
496
497 rdesc->name = "fan53555-reg";
498 rdesc->supply_name = "vin";
499 rdesc->ops = &fan53555_regulator_ops;
500 rdesc->type = REGULATOR_VOLTAGE;
501 rdesc->n_voltages = di->vsel_count;
502 rdesc->enable_reg = di->vol_reg;
503 rdesc->enable_mask = VSEL_BUCK_EN;
504 rdesc->min_uV = di->vsel_min;
505 rdesc->uV_step = di->vsel_step;
506 rdesc->vsel_reg = di->vol_reg;
507 rdesc->vsel_mask = di->vsel_count - 1;
508 rdesc->owner = THIS_MODULE;
509
510 rdev = devm_regulator_register(di->dev, &di->desc, config);
511 return PTR_ERR_OR_ZERO(rdev);
512 }
513
514 static const struct regmap_config fan53555_regmap_config = {
515 .reg_bits = 8,
516 .val_bits = 8,
517 };
518
fan53555_parse_dt(struct device * dev,struct device_node * np,const struct regulator_desc * desc)519 static struct fan53555_platform_data *fan53555_parse_dt(struct device *dev,
520 struct device_node *np,
521 const struct regulator_desc *desc)
522 {
523 struct fan53555_platform_data *pdata;
524 int ret;
525 u32 tmp;
526
527 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
528 if (!pdata)
529 return NULL;
530
531 pdata->regulator = of_get_regulator_init_data(dev, np, desc);
532
533 ret = of_property_read_u32(np, "fcs,suspend-voltage-selector",
534 &tmp);
535 if (!ret)
536 pdata->sleep_vsel_id = tmp;
537
538 return pdata;
539 }
540
541 static const struct of_device_id __maybe_unused fan53555_dt_ids[] = {
542 {
543 .compatible = "fcs,fan53526",
544 .data = (void *)FAN53526_VENDOR_FAIRCHILD,
545 }, {
546 .compatible = "fcs,fan53555",
547 .data = (void *)FAN53555_VENDOR_FAIRCHILD
548 }, {
549 .compatible = "silergy,syr827",
550 .data = (void *)FAN53555_VENDOR_SILERGY,
551 }, {
552 .compatible = "silergy,syr828",
553 .data = (void *)FAN53555_VENDOR_SILERGY,
554 }, {
555 .compatible = "tcs,tcs4525",
556 .data = (void *)FAN53555_VENDOR_TCS
557 },
558 { }
559 };
560 MODULE_DEVICE_TABLE(of, fan53555_dt_ids);
561
fan53555_regulator_probe(struct i2c_client * client,const struct i2c_device_id * id)562 static int fan53555_regulator_probe(struct i2c_client *client,
563 const struct i2c_device_id *id)
564 {
565 struct device_node *np = client->dev.of_node;
566 struct fan53555_device_info *di;
567 struct fan53555_platform_data *pdata;
568 struct regulator_config config = { };
569 struct regmap *regmap;
570 unsigned int val;
571 int ret;
572
573 di = devm_kzalloc(&client->dev, sizeof(struct fan53555_device_info),
574 GFP_KERNEL);
575 if (!di)
576 return -ENOMEM;
577
578 pdata = dev_get_platdata(&client->dev);
579 if (!pdata)
580 pdata = fan53555_parse_dt(&client->dev, np, &di->desc);
581
582 if (!pdata || !pdata->regulator) {
583 dev_err(&client->dev, "Platform data not found!\n");
584 return -ENODEV;
585 }
586
587 di->regulator = pdata->regulator;
588 if (client->dev.of_node) {
589 di->vendor =
590 (unsigned long)of_device_get_match_data(&client->dev);
591 } else {
592 /* if no ramp constraint set, get the pdata ramp_delay */
593 if (!di->regulator->constraints.ramp_delay) {
594 if (pdata->slew_rate >= ARRAY_SIZE(slew_rates)) {
595 dev_err(&client->dev, "Invalid slew_rate\n");
596 return -EINVAL;
597 }
598
599 di->regulator->constraints.ramp_delay
600 = slew_rates[pdata->slew_rate];
601 }
602
603 di->vendor = id->driver_data;
604 }
605
606 regmap = devm_regmap_init_i2c(client, &fan53555_regmap_config);
607 if (IS_ERR(regmap)) {
608 dev_err(&client->dev, "Failed to allocate regmap!\n");
609 return PTR_ERR(regmap);
610 }
611 di->dev = &client->dev;
612 i2c_set_clientdata(client, di);
613 /* Get chip ID */
614 ret = regmap_read(regmap, FAN53555_ID1, &val);
615 if (ret < 0) {
616 dev_err(&client->dev, "Failed to get chip ID!\n");
617 return ret;
618 }
619 di->chip_id = val & DIE_ID;
620 /* Get chip revision */
621 ret = regmap_read(regmap, FAN53555_ID2, &val);
622 if (ret < 0) {
623 dev_err(&client->dev, "Failed to get chip Rev!\n");
624 return ret;
625 }
626 di->chip_rev = val & DIE_REV;
627 dev_info(&client->dev, "FAN53555 Option[%d] Rev[%d] Detected!\n",
628 di->chip_id, di->chip_rev);
629 /* Device init */
630 ret = fan53555_device_setup(di, pdata);
631 if (ret < 0) {
632 dev_err(&client->dev, "Failed to setup device!\n");
633 return ret;
634 }
635 /* Register regulator */
636 config.dev = di->dev;
637 config.init_data = di->regulator;
638 config.regmap = regmap;
639 config.driver_data = di;
640 config.of_node = np;
641
642 ret = fan53555_regulator_register(di, &config);
643 if (ret < 0)
644 dev_err(&client->dev, "Failed to register regulator!\n");
645 return ret;
646
647 }
648
649 static const struct i2c_device_id fan53555_id[] = {
650 {
651 .name = "fan53526",
652 .driver_data = FAN53526_VENDOR_FAIRCHILD
653 }, {
654 .name = "fan53555",
655 .driver_data = FAN53555_VENDOR_FAIRCHILD
656 }, {
657 .name = "syr827",
658 .driver_data = FAN53555_VENDOR_SILERGY
659 }, {
660 .name = "syr828",
661 .driver_data = FAN53555_VENDOR_SILERGY
662 }, {
663 .name = "tcs4525",
664 .driver_data = FAN53555_VENDOR_TCS
665 },
666 { },
667 };
668 MODULE_DEVICE_TABLE(i2c, fan53555_id);
669
670 static struct i2c_driver fan53555_regulator_driver = {
671 .driver = {
672 .name = "fan53555-regulator",
673 .of_match_table = of_match_ptr(fan53555_dt_ids),
674 },
675 .probe = fan53555_regulator_probe,
676 .id_table = fan53555_id,
677 };
678
679 module_i2c_driver(fan53555_regulator_driver);
680
681 MODULE_AUTHOR("Yunfan Zhang <yfzhang@marvell.com>");
682 MODULE_DESCRIPTION("FAN53555 regulator driver");
683 MODULE_LICENSE("GPL v2");
684