fan53555.c

  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
 68enum 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
 77enum {
 78	FAN53526_CHIP_ID_01 = 1,
 79};
 80
 81enum {
 82	FAN53526_CHIP_REV_08 = 8,
 83};
 84
 85/* IC Type */
 86enum {
 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
 96enum {
 97	RK8600_CHIP_ID_08 = 8,		/* RK8600, RK8601 */
 98};
 99
100enum {
101	RK8602_CHIP_ID_10 = 10,		/* RK8602, RK8603 */
102};
103
104enum {
105	TCS4525_CHIP_ID_12 = 12,
106};
107
108enum {
109	TCS4526_CHIP_ID_00 = 0,
110};
111
112/* IC mask revision */
113enum {
114	FAN53555_CHIP_REV_00 = 0x3,
115	FAN53555_CHIP_REV_13 = 0xf,
116};
117
118enum {
119	SILERGY_SYR82X = 8,
120	SILERGY_SYR83X = 9,
121};
122
123struct 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
154static 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
175static 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
183static 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
191static 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
209static 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
224static const unsigned int slew_rates[] = {
225	64000,
226	32000,
227	16000,
228	 8000,
229	 4000,
230	 2000,
231	 1000,
232	  500,
233};
234
235static const unsigned int tcs_slew_rates[] = {
236	18700,
237	 9300,
238	 4600,
239	 2300,
240};
241
242static 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
259static 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
292static 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
346static 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
369static 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
392static 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
416static 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 * */
444static 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
589static 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
617static const struct regmap_config fan53555_regmap_config = {
618	.reg_bits = 8,
619	.val_bits = 8,
620};
621
622static 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
644static 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};
672MODULE_DEVICE_TABLE(of, fan53555_dt_ids);
673
674static 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
751static 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};
779MODULE_DEVICE_TABLE(i2c, fan53555_id);
780
781static 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
791module_i2c_driver(fan53555_regulator_driver);
792
793MODULE_AUTHOR("Yunfan Zhang <yfzhang@marvell.com>");
794MODULE_DESCRIPTION("FAN53555 regulator driver");
795MODULE_LICENSE("GPL v2");