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/bitops.h>
12 #include <linux/err.h>
13 #include <linux/i2c.h>
14 #include <linux/module.h>
15 #include <linux/of.h>
16 #include <linux/param.h>
17 #include <linux/platform_device.h>
18 #include <linux/regmap.h>
19 #include <linux/regulator/driver.h>
20 #include <linux/regulator/fan53555.h>
21 #include <linux/regulator/machine.h>
22 #include <linux/regulator/of_regulator.h>
23 #include <linux/slab.h>
24
25 /* Voltage setting */
26 #define FAN53555_VSEL0 0x00
27 #define FAN53555_VSEL1 0x01
28
29 #define RK8602_VSEL0 0x06
30 #define RK8602_VSEL1 0x07
31
32 #define TCS4525_VSEL0 0x11
33 #define TCS4525_VSEL1 0x10
34 #define TCS4525_TIME 0x13
35 #define TCS4525_COMMAND 0x14
36
37 /* Control register */
38 #define FAN53555_CONTROL 0x02
39 /* IC Type */
40 #define FAN53555_ID1 0x03
41 /* IC mask version */
42 #define FAN53555_ID2 0x04
43 /* Monitor register */
44 #define FAN53555_MONITOR 0x05
45
46 /* VSEL bit definitions */
47 #define VSEL_BUCK_EN BIT(7)
48 #define VSEL_MODE BIT(6)
49 /* Chip ID and Version */
50 #define DIE_ID 0x0F /* ID1 */
51 #define DIE_REV 0x0F /* ID2 */
52 /* Control bit definitions */
53 #define CTL_OUTPUT_DISCHG BIT(7)
54 #define CTL_SLEW_MASK GENMASK(6, 4)
55 #define CTL_RESET BIT(2)
56 #define CTL_MODE_VSEL0_MODE BIT(0)
57 #define CTL_MODE_VSEL1_MODE BIT(1)
58
59 #define FAN53555_NVOLTAGES 64 /* Numbers of voltages */
60 #define FAN53526_NVOLTAGES 128
61 #define RK8602_NVOLTAGES 160
62
63 #define TCS_VSEL0_MODE BIT(7)
64 #define TCS_VSEL1_MODE BIT(6)
65
66 #define TCS_SLEW_MASK GENMASK(4, 3)
67
68 enum fan53555_vendor {
69 FAN53526_VENDOR_FAIRCHILD = 0,
70 FAN53555_VENDOR_FAIRCHILD,
71 FAN53555_VENDOR_ROCKCHIP, /* RK8600, RK8601 */
72 RK8602_VENDOR_ROCKCHIP, /* RK8602, RK8603 */
73 FAN53555_VENDOR_SILERGY,
74 FAN53526_VENDOR_TCS,
75 };
76
77 enum {
78 FAN53526_CHIP_ID_01 = 1,
79 };
80
81 enum {
82 FAN53526_CHIP_REV_08 = 8,
83 };
84
85 /* IC Type */
86 enum {
87 FAN53555_CHIP_ID_00 = 0,
88 FAN53555_CHIP_ID_01,
89 FAN53555_CHIP_ID_02,
90 FAN53555_CHIP_ID_03,
91 FAN53555_CHIP_ID_04,
92 FAN53555_CHIP_ID_05,
93 FAN53555_CHIP_ID_08 = 8,
94 };
95
96 enum {
97 RK8600_CHIP_ID_08 = 8, /* RK8600, RK8601 */
98 };
99
100 enum {
101 RK8602_CHIP_ID_10 = 10, /* RK8602, RK8603 */
102 };
103
104 enum {
105 TCS4525_CHIP_ID_12 = 12,
106 };
107
108 enum {
109 TCS4526_CHIP_ID_00 = 0,
110 };
111
112 /* IC mask revision */
113 enum {
114 FAN53555_CHIP_REV_00 = 0x3,
115 FAN53555_CHIP_REV_13 = 0xf,
116 };
117
118 enum {
119 SILERGY_SYR82X = 8,
120 SILERGY_SYR83X = 9,
121 };
122
123 struct fan53555_device_info {
124 enum fan53555_vendor vendor;
125 struct device *dev;
126 struct regulator_desc desc;
127 struct regulator_init_data *regulator;
128 /* IC Type and Rev */
129 int chip_id;
130 int chip_rev;
131 /* Voltage setting register */
132 unsigned int vol_reg;
133 unsigned int sleep_reg;
134 unsigned int en_reg;
135 unsigned int sleep_en_reg;
136 /* Voltage range and step(linear) */
137 unsigned int vsel_min;
138 unsigned int vsel_step;
139 unsigned int vsel_count;
140 /* Mode */
141 unsigned int mode_reg;
142 unsigned int mode_mask;
143 /* Sleep voltage cache */
144 unsigned int sleep_vol_cache;
145 /* Slew rate */
146 unsigned int slew_reg;
147 unsigned int slew_mask;
148 const unsigned int *ramp_delay_table;
149 unsigned int n_ramp_values;
150 unsigned int enable_time;
151 unsigned int slew_rate;
152 };
153
fan53555_set_suspend_voltage(struct regulator_dev * rdev,int uV)154 static int fan53555_set_suspend_voltage(struct regulator_dev *rdev, int uV)
155 {
156 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
157 int ret;
158
159 if (di->sleep_vol_cache == uV)
160 return 0;
161 ret = regulator_map_voltage_linear(rdev, uV, uV);
162 if (ret < 0)
163 return ret;
164 ret = regmap_update_bits(rdev->regmap, di->sleep_reg,
165 di->desc.vsel_mask, ret);
166 if (ret < 0)
167 return ret;
168 /* Cache the sleep voltage setting.
169 * Might not be the real voltage which is rounded */
170 di->sleep_vol_cache = uV;
171
172 return 0;
173 }
174
fan53555_set_suspend_enable(struct regulator_dev * rdev)175 static int fan53555_set_suspend_enable(struct regulator_dev *rdev)
176 {
177 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
178
179 return regmap_update_bits(rdev->regmap, di->sleep_en_reg,
180 VSEL_BUCK_EN, VSEL_BUCK_EN);
181 }
182
fan53555_set_suspend_disable(struct regulator_dev * rdev)183 static int fan53555_set_suspend_disable(struct regulator_dev *rdev)
184 {
185 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
186
187 return regmap_update_bits(rdev->regmap, di->sleep_en_reg,
188 VSEL_BUCK_EN, 0);
189 }
190
fan53555_set_mode(struct regulator_dev * rdev,unsigned int mode)191 static int fan53555_set_mode(struct regulator_dev *rdev, unsigned int mode)
192 {
193 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
194
195 switch (mode) {
196 case REGULATOR_MODE_FAST:
197 regmap_update_bits(rdev->regmap, di->mode_reg,
198 di->mode_mask, di->mode_mask);
199 break;
200 case REGULATOR_MODE_NORMAL:
201 regmap_update_bits(rdev->regmap, di->vol_reg, di->mode_mask, 0);
202 break;
203 default:
204 return -EINVAL;
205 }
206 return 0;
207 }
208
fan53555_get_mode(struct regulator_dev * rdev)209 static unsigned int fan53555_get_mode(struct regulator_dev *rdev)
210 {
211 struct fan53555_device_info *di = rdev_get_drvdata(rdev);
212 unsigned int val;
213 int ret = 0;
214
215 ret = regmap_read(rdev->regmap, di->mode_reg, &val);
216 if (ret < 0)
217 return ret;
218 if (val & di->mode_mask)
219 return REGULATOR_MODE_FAST;
220 else
221 return REGULATOR_MODE_NORMAL;
222 }
223
224 static const unsigned int slew_rates[] = {
225 64000,
226 32000,
227 16000,
228 8000,
229 4000,
230 2000,
231 1000,
232 500,
233 };
234
235 static const unsigned int tcs_slew_rates[] = {
236 18700,
237 9300,
238 4600,
239 2300,
240 };
241
242 static const struct regulator_ops fan53555_regulator_ops = {
243 .set_voltage_sel = regulator_set_voltage_sel_regmap,
244 .get_voltage_sel = regulator_get_voltage_sel_regmap,
245 .set_voltage_time_sel = regulator_set_voltage_time_sel,
246 .map_voltage = regulator_map_voltage_linear,
247 .list_voltage = regulator_list_voltage_linear,
248 .set_suspend_voltage = fan53555_set_suspend_voltage,
249 .enable = regulator_enable_regmap,
250 .disable = regulator_disable_regmap,
251 .is_enabled = regulator_is_enabled_regmap,
252 .set_mode = fan53555_set_mode,
253 .get_mode = fan53555_get_mode,
254 .set_ramp_delay = regulator_set_ramp_delay_regmap,
255 .set_suspend_enable = fan53555_set_suspend_enable,
256 .set_suspend_disable = fan53555_set_suspend_disable,
257 };
258
fan53526_voltages_setup_fairchild(struct fan53555_device_info * di)259 static int fan53526_voltages_setup_fairchild(struct fan53555_device_info *di)
260 {
261 /* Init voltage range and step */
262 switch (di->chip_id) {
263 case FAN53526_CHIP_ID_01:
264 switch (di->chip_rev) {
265 case FAN53526_CHIP_REV_08:
266 di->vsel_min = 600000;
267 di->vsel_step = 6250;
268 break;
269 default:
270 dev_err(di->dev,
271 "Chip ID %d with rev %d not supported!\n",
272 di->chip_id, di->chip_rev);
273 return -EINVAL;
274 }
275 break;
276 default:
277 dev_err(di->dev,
278 "Chip ID %d not supported!\n", di->chip_id);
279 return -EINVAL;
280 }
281
282 di->slew_reg = FAN53555_CONTROL;
283 di->slew_mask = CTL_SLEW_MASK;
284 di->ramp_delay_table = slew_rates;
285 di->n_ramp_values = ARRAY_SIZE(slew_rates);
286 di->enable_time = 250;
287 di->vsel_count = FAN53526_NVOLTAGES;
288
289 return 0;
290 }
291
fan53555_voltages_setup_fairchild(struct fan53555_device_info * di)292 static int fan53555_voltages_setup_fairchild(struct fan53555_device_info *di)
293 {
294 /* Init voltage range and step */
295 switch (di->chip_id) {
296 case FAN53555_CHIP_ID_00:
297 switch (di->chip_rev) {
298 case FAN53555_CHIP_REV_00:
299 di->vsel_min = 600000;
300 di->vsel_step = 10000;
301 di->enable_time = 400;
302 break;
303 case FAN53555_CHIP_REV_13:
304 di->vsel_min = 800000;
305 di->vsel_step = 10000;
306 di->enable_time = 400;
307 break;
308 default:
309 dev_err(di->dev,
310 "Chip ID %d with rev %d not supported!\n",
311 di->chip_id, di->chip_rev);
312 return -EINVAL;
313 }
314 break;
315 case FAN53555_CHIP_ID_01:
316 case FAN53555_CHIP_ID_03:
317 case FAN53555_CHIP_ID_05:
318 di->vsel_min = 600000;
319 di->vsel_step = 10000;
320 di->enable_time = 400;
321 break;
322 case FAN53555_CHIP_ID_08:
323 di->vsel_min = 600000;
324 di->vsel_step = 10000;
325 di->enable_time = 175;
326 break;
327 case FAN53555_CHIP_ID_04:
328 di->vsel_min = 603000;
329 di->vsel_step = 12826;
330 di->enable_time = 400;
331 break;
332 default:
333 dev_err(di->dev,
334 "Chip ID %d not supported!\n", di->chip_id);
335 return -EINVAL;
336 }
337 di->slew_reg = FAN53555_CONTROL;
338 di->slew_mask = CTL_SLEW_MASK;
339 di->ramp_delay_table = slew_rates;
340 di->n_ramp_values = ARRAY_SIZE(slew_rates);
341 di->vsel_count = FAN53555_NVOLTAGES;
342
343 return 0;
344 }
345
fan53555_voltages_setup_rockchip(struct fan53555_device_info * di)346 static int fan53555_voltages_setup_rockchip(struct fan53555_device_info *di)
347 {
348 /* Init voltage range and step */
349 switch (di->chip_id) {
350 case RK8600_CHIP_ID_08:
351 di->vsel_min = 712500;
352 di->vsel_step = 12500;
353 break;
354 default:
355 dev_err(di->dev,
356 "Chip ID %d not supported!\n", di->chip_id);
357 return -EINVAL;
358 }
359 di->slew_reg = FAN53555_CONTROL;
360 di->slew_mask = CTL_SLEW_MASK;
361 di->ramp_delay_table = slew_rates;
362 di->n_ramp_values = ARRAY_SIZE(slew_rates);
363 di->enable_time = 360;
364 di->vsel_count = FAN53555_NVOLTAGES;
365
366 return 0;
367 }
368
rk8602_voltages_setup_rockchip(struct fan53555_device_info * di)369 static int rk8602_voltages_setup_rockchip(struct fan53555_device_info *di)
370 {
371 /* Init voltage range and step */
372 switch (di->chip_id) {
373 case RK8602_CHIP_ID_10:
374 di->vsel_min = 500000;
375 di->vsel_step = 6250;
376 break;
377 default:
378 dev_err(di->dev,
379 "Chip ID %d not supported!\n", di->chip_id);
380 return -EINVAL;
381 }
382 di->slew_reg = FAN53555_CONTROL;
383 di->slew_mask = CTL_SLEW_MASK;
384 di->ramp_delay_table = slew_rates;
385 di->n_ramp_values = ARRAY_SIZE(slew_rates);
386 di->enable_time = 360;
387 di->vsel_count = RK8602_NVOLTAGES;
388
389 return 0;
390 }
391
fan53555_voltages_setup_silergy(struct fan53555_device_info * di)392 static int fan53555_voltages_setup_silergy(struct fan53555_device_info *di)
393 {
394 /* Init voltage range and step */
395 switch (di->chip_id) {
396 case SILERGY_SYR82X:
397 case SILERGY_SYR83X:
398 di->vsel_min = 712500;
399 di->vsel_step = 12500;
400 break;
401 default:
402 dev_err(di->dev,
403 "Chip ID %d not supported!\n", di->chip_id);
404 return -EINVAL;
405 }
406 di->slew_reg = FAN53555_CONTROL;
407 di->slew_mask = CTL_SLEW_MASK;
408 di->ramp_delay_table = slew_rates;
409 di->n_ramp_values = ARRAY_SIZE(slew_rates);
410 di->enable_time = 400;
411 di->vsel_count = FAN53555_NVOLTAGES;
412
413 return 0;
414 }
415
fan53526_voltages_setup_tcs(struct fan53555_device_info * di)416 static int fan53526_voltages_setup_tcs(struct fan53555_device_info *di)
417 {
418 switch (di->chip_id) {
419 case TCS4525_CHIP_ID_12:
420 case TCS4526_CHIP_ID_00:
421 di->slew_reg = TCS4525_TIME;
422 di->slew_mask = TCS_SLEW_MASK;
423 di->ramp_delay_table = tcs_slew_rates;
424 di->n_ramp_values = ARRAY_SIZE(tcs_slew_rates);
425
426 /* Init voltage range and step */
427 di->vsel_min = 600000;
428 di->vsel_step = 6250;
429 di->vsel_count = FAN53526_NVOLTAGES;
430 break;
431 default:
432 dev_err(di->dev, "Chip ID %d not supported!\n", di->chip_id);
433 return -EINVAL;
434 }
435
436 return 0;
437 }
438
439 /* For 00,01,03,05 options:
440 * VOUT = 0.60V + NSELx * 10mV, from 0.60 to 1.23V.
441 * For 04 option:
442 * VOUT = 0.603V + NSELx * 12.826mV, from 0.603 to 1.411V.
443 * */
fan53555_device_setup(struct fan53555_device_info * di,struct fan53555_platform_data * pdata)444 static int fan53555_device_setup(struct fan53555_device_info *di,
445 struct fan53555_platform_data *pdata)
446 {
447 int ret = 0;
448
449 /* Setup voltage control register */
450 switch (di->vendor) {
451 case FAN53526_VENDOR_FAIRCHILD:
452 case FAN53555_VENDOR_FAIRCHILD:
453 case FAN53555_VENDOR_ROCKCHIP:
454 case FAN53555_VENDOR_SILERGY:
455 switch (pdata->sleep_vsel_id) {
456 case FAN53555_VSEL_ID_0:
457 di->sleep_reg = FAN53555_VSEL0;
458 di->vol_reg = FAN53555_VSEL1;
459 break;
460 case FAN53555_VSEL_ID_1:
461 di->sleep_reg = FAN53555_VSEL1;
462 di->vol_reg = FAN53555_VSEL0;
463 break;
464 default:
465 dev_err(di->dev, "Invalid VSEL ID!\n");
466 return -EINVAL;
467 }
468 di->sleep_en_reg = di->sleep_reg;
469 di->en_reg = di->vol_reg;
470 break;
471 case RK8602_VENDOR_ROCKCHIP:
472 switch (pdata->sleep_vsel_id) {
473 case FAN53555_VSEL_ID_0:
474 di->sleep_reg = RK8602_VSEL0;
475 di->vol_reg = RK8602_VSEL1;
476 di->sleep_en_reg = FAN53555_VSEL0;
477 di->en_reg = FAN53555_VSEL1;
478 break;
479 case FAN53555_VSEL_ID_1:
480 di->sleep_reg = RK8602_VSEL1;
481 di->vol_reg = RK8602_VSEL0;
482 di->sleep_en_reg = FAN53555_VSEL1;
483 di->en_reg = FAN53555_VSEL0;
484 break;
485 default:
486 dev_err(di->dev, "Invalid VSEL ID!\n");
487 return -EINVAL;
488 }
489 break;
490 case FAN53526_VENDOR_TCS:
491 switch (pdata->sleep_vsel_id) {
492 case FAN53555_VSEL_ID_0:
493 di->sleep_reg = TCS4525_VSEL0;
494 di->vol_reg = TCS4525_VSEL1;
495 break;
496 case FAN53555_VSEL_ID_1:
497 di->sleep_reg = TCS4525_VSEL1;
498 di->vol_reg = TCS4525_VSEL0;
499 break;
500 default:
501 dev_err(di->dev, "Invalid VSEL ID!\n");
502 return -EINVAL;
503 }
504 di->sleep_en_reg = di->sleep_reg;
505 di->en_reg = di->vol_reg;
506 break;
507 default:
508 dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
509 return -EINVAL;
510 }
511
512 /* Setup mode control register */
513 switch (di->vendor) {
514 case FAN53526_VENDOR_FAIRCHILD:
515 di->mode_reg = FAN53555_CONTROL;
516
517 switch (pdata->sleep_vsel_id) {
518 case FAN53555_VSEL_ID_0:
519 di->mode_mask = CTL_MODE_VSEL1_MODE;
520 break;
521 case FAN53555_VSEL_ID_1:
522 di->mode_mask = CTL_MODE_VSEL0_MODE;
523 break;
524 }
525 break;
526 case FAN53555_VENDOR_FAIRCHILD:
527 case FAN53555_VENDOR_ROCKCHIP:
528 case FAN53555_VENDOR_SILERGY:
529 di->mode_reg = di->vol_reg;
530 di->mode_mask = VSEL_MODE;
531 break;
532 case RK8602_VENDOR_ROCKCHIP:
533 di->mode_mask = VSEL_MODE;
534
535 switch (pdata->sleep_vsel_id) {
536 case FAN53555_VSEL_ID_0:
537 di->mode_reg = FAN53555_VSEL1;
538 break;
539 case FAN53555_VSEL_ID_1:
540 di->mode_reg = FAN53555_VSEL0;
541 break;
542 }
543 break;
544 case FAN53526_VENDOR_TCS:
545 di->mode_reg = TCS4525_COMMAND;
546
547 switch (pdata->sleep_vsel_id) {
548 case FAN53555_VSEL_ID_0:
549 di->mode_mask = TCS_VSEL1_MODE;
550 break;
551 case FAN53555_VSEL_ID_1:
552 di->mode_mask = TCS_VSEL0_MODE;
553 break;
554 }
555 break;
556 default:
557 dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
558 return -EINVAL;
559 }
560
561 /* Setup voltage range */
562 switch (di->vendor) {
563 case FAN53526_VENDOR_FAIRCHILD:
564 ret = fan53526_voltages_setup_fairchild(di);
565 break;
566 case FAN53555_VENDOR_FAIRCHILD:
567 ret = fan53555_voltages_setup_fairchild(di);
568 break;
569 case FAN53555_VENDOR_ROCKCHIP:
570 ret = fan53555_voltages_setup_rockchip(di);
571 break;
572 case RK8602_VENDOR_ROCKCHIP:
573 ret = rk8602_voltages_setup_rockchip(di);
574 break;
575 case FAN53555_VENDOR_SILERGY:
576 ret = fan53555_voltages_setup_silergy(di);
577 break;
578 case FAN53526_VENDOR_TCS:
579 ret = fan53526_voltages_setup_tcs(di);
580 break;
581 default:
582 dev_err(di->dev, "vendor %d not supported!\n", di->vendor);
583 return -EINVAL;
584 }
585
586 return ret;
587 }
588
fan53555_regulator_register(struct fan53555_device_info * di,struct regulator_config * config)589 static int fan53555_regulator_register(struct fan53555_device_info *di,
590 struct regulator_config *config)
591 {
592 struct regulator_desc *rdesc = &di->desc;
593 struct regulator_dev *rdev;
594
595 rdesc->name = "fan53555-reg";
596 rdesc->supply_name = "vin";
597 rdesc->ops = &fan53555_regulator_ops;
598 rdesc->type = REGULATOR_VOLTAGE;
599 rdesc->n_voltages = di->vsel_count;
600 rdesc->enable_reg = di->en_reg;
601 rdesc->enable_mask = VSEL_BUCK_EN;
602 rdesc->min_uV = di->vsel_min;
603 rdesc->uV_step = di->vsel_step;
604 rdesc->vsel_reg = di->vol_reg;
605 rdesc->vsel_mask = BIT(fls(di->vsel_count - 1)) - 1;
606 rdesc->ramp_reg = di->slew_reg;
607 rdesc->ramp_mask = di->slew_mask;
608 rdesc->ramp_delay_table = di->ramp_delay_table;
609 rdesc->n_ramp_values = di->n_ramp_values;
610 rdesc->enable_time = di->enable_time;
611 rdesc->owner = THIS_MODULE;
612
613 rdev = devm_regulator_register(di->dev, &di->desc, config);
614 return PTR_ERR_OR_ZERO(rdev);
615 }
616
617 static const struct regmap_config fan53555_regmap_config = {
618 .reg_bits = 8,
619 .val_bits = 8,
620 };
621
fan53555_parse_dt(struct device * dev,struct device_node * np,const struct regulator_desc * desc)622 static struct fan53555_platform_data *fan53555_parse_dt(struct device *dev,
623 struct device_node *np,
624 const struct regulator_desc *desc)
625 {
626 struct fan53555_platform_data *pdata;
627 int ret;
628 u32 tmp;
629
630 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
631 if (!pdata)
632 return NULL;
633
634 pdata->regulator = of_get_regulator_init_data(dev, np, desc);
635
636 ret = of_property_read_u32(np, "fcs,suspend-voltage-selector",
637 &tmp);
638 if (!ret)
639 pdata->sleep_vsel_id = tmp;
640
641 return pdata;
642 }
643
644 static const struct of_device_id __maybe_unused fan53555_dt_ids[] = {
645 {
646 .compatible = "fcs,fan53526",
647 .data = (void *)FAN53526_VENDOR_FAIRCHILD,
648 }, {
649 .compatible = "fcs,fan53555",
650 .data = (void *)FAN53555_VENDOR_FAIRCHILD
651 }, {
652 .compatible = "rockchip,rk8600",
653 .data = (void *)FAN53555_VENDOR_ROCKCHIP
654 }, {
655 .compatible = "rockchip,rk8602",
656 .data = (void *)RK8602_VENDOR_ROCKCHIP
657 }, {
658 .compatible = "silergy,syr827",
659 .data = (void *)FAN53555_VENDOR_SILERGY,
660 }, {
661 .compatible = "silergy,syr828",
662 .data = (void *)FAN53555_VENDOR_SILERGY,
663 }, {
664 .compatible = "tcs,tcs4525",
665 .data = (void *)FAN53526_VENDOR_TCS
666 }, {
667 .compatible = "tcs,tcs4526",
668 .data = (void *)FAN53526_VENDOR_TCS
669 },
670 { }
671 };
672 MODULE_DEVICE_TABLE(of, fan53555_dt_ids);
673
fan53555_regulator_probe(struct i2c_client * client)674 static int fan53555_regulator_probe(struct i2c_client *client)
675 {
676 struct device_node *np = client->dev.of_node;
677 struct fan53555_device_info *di;
678 struct fan53555_platform_data *pdata;
679 struct regulator_config config = { };
680 struct regmap *regmap;
681 unsigned int val;
682 int ret;
683
684 di = devm_kzalloc(&client->dev, sizeof(struct fan53555_device_info),
685 GFP_KERNEL);
686 if (!di)
687 return -ENOMEM;
688
689 pdata = dev_get_platdata(&client->dev);
690 if (!pdata)
691 pdata = fan53555_parse_dt(&client->dev, np, &di->desc);
692
693 if (!pdata || !pdata->regulator)
694 return dev_err_probe(&client->dev, -ENODEV,
695 "Platform data not found!\n");
696
697 di->regulator = pdata->regulator;
698 di->vendor = (uintptr_t)i2c_get_match_data(client);
699 if (!dev_fwnode(&client->dev)) {
700 /* if no ramp constraint set, get the pdata ramp_delay */
701 if (!di->regulator->constraints.ramp_delay) {
702 if (pdata->slew_rate >= ARRAY_SIZE(slew_rates))
703 return dev_err_probe(&client->dev, -EINVAL,
704 "Invalid slew_rate\n");
705
706 di->regulator->constraints.ramp_delay
707 = slew_rates[pdata->slew_rate];
708 }
709 }
710
711 regmap = devm_regmap_init_i2c(client, &fan53555_regmap_config);
712 if (IS_ERR(regmap))
713 return dev_err_probe(&client->dev, PTR_ERR(regmap),
714 "Failed to allocate regmap!\n");
715
716 di->dev = &client->dev;
717 i2c_set_clientdata(client, di);
718 /* Get chip ID */
719 ret = regmap_read(regmap, FAN53555_ID1, &val);
720 if (ret < 0)
721 return dev_err_probe(&client->dev, ret, "Failed to get chip ID!\n");
722
723 di->chip_id = val & DIE_ID;
724 /* Get chip revision */
725 ret = regmap_read(regmap, FAN53555_ID2, &val);
726 if (ret < 0)
727 return dev_err_probe(&client->dev, ret, "Failed to get chip Rev!\n");
728
729 di->chip_rev = val & DIE_REV;
730 dev_info(&client->dev, "FAN53555 Option[%d] Rev[%d] Detected!\n",
731 di->chip_id, di->chip_rev);
732 /* Device init */
733 ret = fan53555_device_setup(di, pdata);
734 if (ret < 0)
735 return dev_err_probe(&client->dev, ret, "Failed to setup device!\n");
736
737 /* Register regulator */
738 config.dev = di->dev;
739 config.init_data = di->regulator;
740 config.regmap = regmap;
741 config.driver_data = di;
742 config.of_node = np;
743
744 ret = fan53555_regulator_register(di, &config);
745 if (ret < 0)
746 dev_err_probe(&client->dev, ret, "Failed to register regulator!\n");
747
748 return ret;
749 }
750
751 static const struct i2c_device_id fan53555_id[] = {
752 {
753 .name = "fan53526",
754 .driver_data = FAN53526_VENDOR_FAIRCHILD
755 }, {
756 .name = "fan53555",
757 .driver_data = FAN53555_VENDOR_FAIRCHILD
758 }, {
759 .name = "rk8600",
760 .driver_data = FAN53555_VENDOR_ROCKCHIP
761 }, {
762 .name = "rk8602",
763 .driver_data = RK8602_VENDOR_ROCKCHIP
764 }, {
765 .name = "syr827",
766 .driver_data = FAN53555_VENDOR_SILERGY
767 }, {
768 .name = "syr828",
769 .driver_data = FAN53555_VENDOR_SILERGY
770 }, {
771 .name = "tcs4525",
772 .driver_data = FAN53526_VENDOR_TCS
773 }, {
774 .name = "tcs4526",
775 .driver_data = FAN53526_VENDOR_TCS
776 },
777 { },
778 };
779 MODULE_DEVICE_TABLE(i2c, fan53555_id);
780
781 static struct i2c_driver fan53555_regulator_driver = {
782 .driver = {
783 .name = "fan53555-regulator",
784 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
785 .of_match_table = of_match_ptr(fan53555_dt_ids),
786 },
787 .probe = fan53555_regulator_probe,
788 .id_table = fan53555_id,
789 };
790
791 module_i2c_driver(fan53555_regulator_driver);
792
793 MODULE_AUTHOR("Yunfan Zhang <yfzhang@marvell.com>");
794 MODULE_DESCRIPTION("FAN53555 regulator driver");
795 MODULE_LICENSE("GPL v2");
796