1// SPDX-License-Identifier: GPL-2.0+
   2//
   3// max8997.c - Regulator driver for the Maxim 8997/8966
   4//
   5// Copyright (C) 2011 Samsung Electronics
   6// MyungJoo Ham <myungjoo.ham@samsung.com>
   7//
   8// This driver is based on max8998.c
   9
  10#include <linux/bug.h>
 
  11#include <linux/err.h>
  12#include <linux/gpio.h>
  13#include <linux/of_gpio.h>
  14#include <linux/slab.h>
  15#include <linux/module.h>
  16#include <linux/platform_device.h>
  17#include <linux/regulator/driver.h>
  18#include <linux/regulator/machine.h>
  19#include <linux/mfd/max8997.h>
  20#include <linux/mfd/max8997-private.h>
  21#include <linux/regulator/of_regulator.h>
  22
  23struct max8997_data {
  24	struct device *dev;
  25	struct max8997_dev *iodev;
  26	int num_regulators;
  27	int ramp_delay; /* in mV/us */
  28
  29	bool buck1_gpiodvs;
  30	bool buck2_gpiodvs;
  31	bool buck5_gpiodvs;
  32	u8 buck1_vol[8];
  33	u8 buck2_vol[8];
  34	u8 buck5_vol[8];
  35	int buck125_gpios[3];
  36	int buck125_gpioindex;
  37	bool ignore_gpiodvs_side_effect;
  38
  39	u8 saved_states[MAX8997_REG_MAX];
  40};
  41
  42static const unsigned int safeoutvolt[] = {
  43	4850000,
  44	4900000,
  45	4950000,
  46	3300000,
  47};
  48
  49static inline void max8997_set_gpio(struct max8997_data *max8997)
  50{
  51	int set3 = (max8997->buck125_gpioindex) & 0x1;
  52	int set2 = ((max8997->buck125_gpioindex) >> 1) & 0x1;
  53	int set1 = ((max8997->buck125_gpioindex) >> 2) & 0x1;
  54
  55	gpio_set_value(max8997->buck125_gpios[0], set1);
  56	gpio_set_value(max8997->buck125_gpios[1], set2);
  57	gpio_set_value(max8997->buck125_gpios[2], set3);
  58}
  59
  60struct voltage_map_desc {
  61	int min;
  62	int max;
  63	int step;
  64};
  65
  66/* Voltage maps in uV */
  67static const struct voltage_map_desc ldo_voltage_map_desc = {
  68	.min = 800000,	.max = 3950000,	.step = 50000,
  69}; /* LDO1 ~ 18, 21 all */
  70
  71static const struct voltage_map_desc buck1245_voltage_map_desc = {
  72	.min = 650000,	.max = 2225000,	.step = 25000,
  73}; /* Buck1, 2, 4, 5 */
  74
  75static const struct voltage_map_desc buck37_voltage_map_desc = {
  76	.min = 750000,	.max = 3900000,	.step = 50000,
  77}; /* Buck3, 7 */
  78
  79/* current map in uA */
  80static const struct voltage_map_desc charger_current_map_desc = {
  81	.min = 200000,	.max = 950000,	.step = 50000,
  82};
  83
  84static const struct voltage_map_desc topoff_current_map_desc = {
  85	.min = 50000,	.max = 200000,	.step = 10000,
  86};
  87
  88static const struct voltage_map_desc *reg_voltage_map[] = {
  89	[MAX8997_LDO1] = &ldo_voltage_map_desc,
  90	[MAX8997_LDO2] = &ldo_voltage_map_desc,
  91	[MAX8997_LDO3] = &ldo_voltage_map_desc,
  92	[MAX8997_LDO4] = &ldo_voltage_map_desc,
  93	[MAX8997_LDO5] = &ldo_voltage_map_desc,
  94	[MAX8997_LDO6] = &ldo_voltage_map_desc,
  95	[MAX8997_LDO7] = &ldo_voltage_map_desc,
  96	[MAX8997_LDO8] = &ldo_voltage_map_desc,
  97	[MAX8997_LDO9] = &ldo_voltage_map_desc,
  98	[MAX8997_LDO10] = &ldo_voltage_map_desc,
  99	[MAX8997_LDO11] = &ldo_voltage_map_desc,
 100	[MAX8997_LDO12] = &ldo_voltage_map_desc,
 101	[MAX8997_LDO13] = &ldo_voltage_map_desc,
 102	[MAX8997_LDO14] = &ldo_voltage_map_desc,
 103	[MAX8997_LDO15] = &ldo_voltage_map_desc,
 104	[MAX8997_LDO16] = &ldo_voltage_map_desc,
 105	[MAX8997_LDO17] = &ldo_voltage_map_desc,
 106	[MAX8997_LDO18] = &ldo_voltage_map_desc,
 107	[MAX8997_LDO21] = &ldo_voltage_map_desc,
 108	[MAX8997_BUCK1] = &buck1245_voltage_map_desc,
 109	[MAX8997_BUCK2] = &buck1245_voltage_map_desc,
 110	[MAX8997_BUCK3] = &buck37_voltage_map_desc,
 111	[MAX8997_BUCK4] = &buck1245_voltage_map_desc,
 112	[MAX8997_BUCK5] = &buck1245_voltage_map_desc,
 113	[MAX8997_BUCK6] = NULL,
 114	[MAX8997_BUCK7] = &buck37_voltage_map_desc,
 115	[MAX8997_EN32KHZ_AP] = NULL,
 116	[MAX8997_EN32KHZ_CP] = NULL,
 117	[MAX8997_ENVICHG] = NULL,
 118	[MAX8997_ESAFEOUT1] = NULL,
 119	[MAX8997_ESAFEOUT2] = NULL,
 120	[MAX8997_CHARGER_CV] = NULL,
 121	[MAX8997_CHARGER] = &charger_current_map_desc,
 122	[MAX8997_CHARGER_TOPOFF] = &topoff_current_map_desc,
 123};
 124
 125static int max8997_list_voltage_charger_cv(struct regulator_dev *rdev,
 126		unsigned int selector)
 127{
 128	int rid = rdev_get_id(rdev);
 129
 130	if (rid != MAX8997_CHARGER_CV)
 131		goto err;
 132
 133	switch (selector) {
 134	case 0x00:
 135		return 4200000;
 136	case 0x01 ... 0x0E:
 137		return 4000000 + 20000 * (selector - 0x01);
 138	case 0x0F:
 139		return 4350000;
 140	default:
 141		return -EINVAL;
 142	}
 143err:
 144	return -EINVAL;
 145}
 146
 147static int max8997_list_voltage(struct regulator_dev *rdev,
 148		unsigned int selector)
 149{
 150	const struct voltage_map_desc *desc;
 151	int rid = rdev_get_id(rdev);
 152	int val;
 153
 154	if (rid < 0 || rid >= ARRAY_SIZE(reg_voltage_map))
 155		return -EINVAL;
 156
 157	desc = reg_voltage_map[rid];
 158	if (desc == NULL)
 159		return -EINVAL;
 160
 161	val = desc->min + desc->step * selector;
 162	if (val > desc->max)
 163		return -EINVAL;
 164
 165	return val;
 166}
 167
 168static int max8997_get_enable_register(struct regulator_dev *rdev,
 169		int *reg, int *mask, int *pattern)
 170{
 171	int rid = rdev_get_id(rdev);
 172
 173	switch (rid) {
 174	case MAX8997_LDO1 ... MAX8997_LDO21:
 175		*reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
 176		*mask = 0xC0;
 177		*pattern = 0xC0;
 178		break;
 179	case MAX8997_BUCK1:
 180		*reg = MAX8997_REG_BUCK1CTRL;
 181		*mask = 0x01;
 182		*pattern = 0x01;
 183		break;
 184	case MAX8997_BUCK2:
 185		*reg = MAX8997_REG_BUCK2CTRL;
 186		*mask = 0x01;
 187		*pattern = 0x01;
 188		break;
 189	case MAX8997_BUCK3:
 190		*reg = MAX8997_REG_BUCK3CTRL;
 191		*mask = 0x01;
 192		*pattern = 0x01;
 193		break;
 194	case MAX8997_BUCK4:
 195		*reg = MAX8997_REG_BUCK4CTRL;
 196		*mask = 0x01;
 197		*pattern = 0x01;
 198		break;
 199	case MAX8997_BUCK5:
 200		*reg = MAX8997_REG_BUCK5CTRL;
 201		*mask = 0x01;
 202		*pattern = 0x01;
 203		break;
 204	case MAX8997_BUCK6:
 205		*reg = MAX8997_REG_BUCK6CTRL;
 206		*mask = 0x01;
 207		*pattern = 0x01;
 208		break;
 209	case MAX8997_BUCK7:
 210		*reg = MAX8997_REG_BUCK7CTRL;
 211		*mask = 0x01;
 212		*pattern = 0x01;
 213		break;
 214	case MAX8997_EN32KHZ_AP ... MAX8997_EN32KHZ_CP:
 215		*reg = MAX8997_REG_MAINCON1;
 216		*mask = 0x01 << (rid - MAX8997_EN32KHZ_AP);
 217		*pattern = 0x01 << (rid - MAX8997_EN32KHZ_AP);
 218		break;
 219	case MAX8997_ENVICHG:
 220		*reg = MAX8997_REG_MBCCTRL1;
 221		*mask = 0x80;
 222		*pattern = 0x80;
 223		break;
 224	case MAX8997_ESAFEOUT1 ... MAX8997_ESAFEOUT2:
 225		*reg = MAX8997_REG_SAFEOUTCTRL;
 226		*mask = 0x40 << (rid - MAX8997_ESAFEOUT1);
 227		*pattern = 0x40 << (rid - MAX8997_ESAFEOUT1);
 228		break;
 229	case MAX8997_CHARGER:
 230		*reg = MAX8997_REG_MBCCTRL2;
 231		*mask = 0x40;
 232		*pattern = 0x40;
 233		break;
 234	default:
 235		/* Not controllable or not exists */
 236		return -EINVAL;
 237	}
 238
 239	return 0;
 240}
 241
 242static int max8997_reg_is_enabled(struct regulator_dev *rdev)
 243{
 244	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
 245	struct i2c_client *i2c = max8997->iodev->i2c;
 246	int ret, reg, mask, pattern;
 247	u8 val;
 248
 249	ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
 250	if (ret)
 251		return ret;
 252
 253	ret = max8997_read_reg(i2c, reg, &val);
 254	if (ret)
 255		return ret;
 256
 257	return (val & mask) == pattern;
 258}
 259
 260static int max8997_reg_enable(struct regulator_dev *rdev)
 261{
 262	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
 263	struct i2c_client *i2c = max8997->iodev->i2c;
 264	int ret, reg, mask, pattern;
 265
 266	ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
 267	if (ret)
 268		return ret;
 269
 270	return max8997_update_reg(i2c, reg, pattern, mask);
 271}
 272
 273static int max8997_reg_disable(struct regulator_dev *rdev)
 274{
 275	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
 276	struct i2c_client *i2c = max8997->iodev->i2c;
 277	int ret, reg, mask, pattern;
 278
 279	ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
 280	if (ret)
 281		return ret;
 282
 283	return max8997_update_reg(i2c, reg, ~pattern, mask);
 284}
 285
 286static int max8997_get_voltage_register(struct regulator_dev *rdev,
 287		int *_reg, int *_shift, int *_mask)
 288{
 289	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
 290	int rid = rdev_get_id(rdev);
 291	int reg, shift = 0, mask = 0x3f;
 292
 293	switch (rid) {
 294	case MAX8997_LDO1 ... MAX8997_LDO21:
 295		reg = MAX8997_REG_LDO1CTRL + (rid - MAX8997_LDO1);
 296		break;
 297	case MAX8997_BUCK1:
 298		reg = MAX8997_REG_BUCK1DVS1;
 299		if (max8997->buck1_gpiodvs)
 300			reg += max8997->buck125_gpioindex;
 301		break;
 302	case MAX8997_BUCK2:
 303		reg = MAX8997_REG_BUCK2DVS1;
 304		if (max8997->buck2_gpiodvs)
 305			reg += max8997->buck125_gpioindex;
 306		break;
 307	case MAX8997_BUCK3:
 308		reg = MAX8997_REG_BUCK3DVS;
 309		break;
 310	case MAX8997_BUCK4:
 311		reg = MAX8997_REG_BUCK4DVS;
 312		break;
 313	case MAX8997_BUCK5:
 314		reg = MAX8997_REG_BUCK5DVS1;
 315		if (max8997->buck5_gpiodvs)
 316			reg += max8997->buck125_gpioindex;
 317		break;
 318	case MAX8997_BUCK7:
 319		reg = MAX8997_REG_BUCK7DVS;
 320		break;
 321	case MAX8997_ESAFEOUT1 ...  MAX8997_ESAFEOUT2:
 322		reg = MAX8997_REG_SAFEOUTCTRL;
 323		shift = (rid == MAX8997_ESAFEOUT2) ? 2 : 0;
 324		mask = 0x3;
 325		break;
 326	case MAX8997_CHARGER_CV:
 327		reg = MAX8997_REG_MBCCTRL3;
 328		shift = 0;
 329		mask = 0xf;
 330		break;
 331	case MAX8997_CHARGER:
 332		reg = MAX8997_REG_MBCCTRL4;
 333		shift = 0;
 334		mask = 0xf;
 335		break;
 336	case MAX8997_CHARGER_TOPOFF:
 337		reg = MAX8997_REG_MBCCTRL5;
 338		shift = 0;
 339		mask = 0xf;
 340		break;
 341	default:
 342		return -EINVAL;
 343	}
 344
 345	*_reg = reg;
 346	*_shift = shift;
 347	*_mask = mask;
 348
 349	return 0;
 350}
 351
 352static int max8997_get_voltage_sel(struct regulator_dev *rdev)
 353{
 354	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
 355	struct i2c_client *i2c = max8997->iodev->i2c;
 356	int reg, shift, mask, ret;
 357	u8 val;
 358
 359	ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
 360	if (ret)
 361		return ret;
 362
 363	ret = max8997_read_reg(i2c, reg, &val);
 364	if (ret)
 365		return ret;
 366
 367	val >>= shift;
 368	val &= mask;
 369
 370	return val;
 371}
 372
 373static inline int max8997_get_voltage_proper_val(
 374		const struct voltage_map_desc *desc,
 375		int min_vol, int max_vol)
 376{
 377	int i;
 378
 379	if (desc == NULL)
 380		return -EINVAL;
 381
 382	if (max_vol < desc->min || min_vol > desc->max)
 383		return -EINVAL;
 384
 385	if (min_vol < desc->min)
 386		min_vol = desc->min;
 387
 388	i = DIV_ROUND_UP(min_vol - desc->min, desc->step);
 389
 390	if (desc->min + desc->step * i > max_vol)
 391		return -EINVAL;
 392
 393	return i;
 394}
 395
 396static int max8997_set_voltage_charger_cv(struct regulator_dev *rdev,
 397		int min_uV, int max_uV, unsigned *selector)
 398{
 399	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
 400	struct i2c_client *i2c = max8997->iodev->i2c;
 401	int rid = rdev_get_id(rdev);
 402	int lb, ub;
 403	int reg, shift = 0, mask, ret = 0;
 404	u8 val = 0x0;
 405
 406	if (rid != MAX8997_CHARGER_CV)
 407		return -EINVAL;
 408
 409	ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
 410	if (ret)
 411		return ret;
 412
 413	if (max_uV < 4000000 || min_uV > 4350000)
 414		return -EINVAL;
 415
 416	if (min_uV <= 4000000)
 417		val = 0x1;
 418	else if (min_uV <= 4200000 && max_uV >= 4200000)
 419		val = 0x0;
 420	else {
 421		lb = (min_uV - 4000001) / 20000 + 2;
 422		ub = (max_uV - 4000000) / 20000 + 1;
 423
 424		if (lb > ub)
 425			return -EINVAL;
 426
 427		if (lb < 0xf)
 428			val = lb;
 429		else {
 430			if (ub >= 0xf)
 431				val = 0xf;
 432			else
 433				return -EINVAL;
 434		}
 435	}
 436
 437	*selector = val;
 438
 439	ret = max8997_update_reg(i2c, reg, val << shift, mask);
 440
 441	return ret;
 442}
 443
 444/*
 445 * For LDO1 ~ LDO21, BUCK1~5, BUCK7, CHARGER, CHARGER_TOPOFF
 446 * BUCK1, 2, and 5 are available if they are not controlled by gpio
 447 */
 448static int max8997_set_voltage_ldobuck(struct regulator_dev *rdev,
 449		int min_uV, int max_uV, unsigned *selector)
 450{
 451	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
 452	struct i2c_client *i2c = max8997->iodev->i2c;
 453	const struct voltage_map_desc *desc;
 454	int rid = rdev_get_id(rdev);
 455	int i, reg, shift, mask, ret;
 456
 457	switch (rid) {
 458	case MAX8997_LDO1 ... MAX8997_LDO21:
 459		break;
 460	case MAX8997_BUCK1 ... MAX8997_BUCK5:
 461		break;
 462	case MAX8997_BUCK6:
 463		return -EINVAL;
 464	case MAX8997_BUCK7:
 465		break;
 466	case MAX8997_CHARGER:
 467		break;
 468	case MAX8997_CHARGER_TOPOFF:
 469		break;
 470	default:
 471		return -EINVAL;
 472	}
 473
 474	desc = reg_voltage_map[rid];
 475
 476	i = max8997_get_voltage_proper_val(desc, min_uV, max_uV);
 477	if (i < 0)
 478		return i;
 479
 480	ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
 481	if (ret)
 482		return ret;
 483
 484	ret = max8997_update_reg(i2c, reg, i << shift, mask << shift);
 485	*selector = i;
 486
 487	return ret;
 488}
 489
 490static int max8997_set_voltage_buck_time_sel(struct regulator_dev *rdev,
 491						unsigned int old_selector,
 492						unsigned int new_selector)
 493{
 494	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
 495	int rid = rdev_get_id(rdev);
 496	const struct voltage_map_desc *desc = reg_voltage_map[rid];
 497
 498	/* Delay is required only if the voltage is increasing */
 499	if (old_selector >= new_selector)
 500		return 0;
 501
 502	/* No need to delay if gpio_dvs_mode */
 503	switch (rid) {
 504	case MAX8997_BUCK1:
 505		if (max8997->buck1_gpiodvs)
 506			return 0;
 507		break;
 508	case MAX8997_BUCK2:
 509		if (max8997->buck2_gpiodvs)
 510			return 0;
 511		break;
 512	case MAX8997_BUCK5:
 513		if (max8997->buck5_gpiodvs)
 514			return 0;
 515		break;
 516	}
 517
 518	switch (rid) {
 519	case MAX8997_BUCK1:
 520	case MAX8997_BUCK2:
 521	case MAX8997_BUCK4:
 522	case MAX8997_BUCK5:
 523		return DIV_ROUND_UP(desc->step * (new_selector - old_selector),
 524				    max8997->ramp_delay * 1000);
 525	}
 526
 527	return 0;
 528}
 529
 530/*
 531 * Assess the damage on the voltage setting of BUCK1,2,5 by the change.
 532 *
 533 * When GPIO-DVS mode is used for multiple bucks, changing the voltage value
 534 * of one of the bucks may affect that of another buck, which is the side
 535 * effect of the change (set_voltage). This function examines the GPIO-DVS
 536 * configurations and checks whether such side-effect exists.
 537 */
 538static int max8997_assess_side_effect(struct regulator_dev *rdev,
 539		u8 new_val, int *best)
 540{
 541	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
 542	int rid = rdev_get_id(rdev);
 543	u8 *buckx_val[3];
 544	bool buckx_gpiodvs[3];
 545	int side_effect[8];
 546	int min_side_effect = INT_MAX;
 547	int i;
 548
 549	*best = -1;
 550
 551	switch (rid) {
 552	case MAX8997_BUCK1:
 553		rid = 0;
 554		break;
 555	case MAX8997_BUCK2:
 556		rid = 1;
 557		break;
 558	case MAX8997_BUCK5:
 559		rid = 2;
 560		break;
 561	default:
 562		return -EINVAL;
 563	}
 564
 565	buckx_val[0] = max8997->buck1_vol;
 566	buckx_val[1] = max8997->buck2_vol;
 567	buckx_val[2] = max8997->buck5_vol;
 568	buckx_gpiodvs[0] = max8997->buck1_gpiodvs;
 569	buckx_gpiodvs[1] = max8997->buck2_gpiodvs;
 570	buckx_gpiodvs[2] = max8997->buck5_gpiodvs;
 571
 572	for (i = 0; i < 8; i++) {
 573		int others;
 574
 575		if (new_val != (buckx_val[rid])[i]) {
 576			side_effect[i] = -1;
 577			continue;
 578		}
 579
 580		side_effect[i] = 0;
 581		for (others = 0; others < 3; others++) {
 582			int diff;
 583
 584			if (others == rid)
 585				continue;
 586			if (buckx_gpiodvs[others] == false)
 587				continue; /* Not affected */
 588			diff = (buckx_val[others])[i] -
 589				(buckx_val[others])[max8997->buck125_gpioindex];
 590			if (diff > 0)
 591				side_effect[i] += diff;
 592			else if (diff < 0)
 593				side_effect[i] -= diff;
 594		}
 595		if (side_effect[i] == 0) {
 596			*best = i;
 597			return 0; /* NO SIDE EFFECT! Use This! */
 598		}
 599		if (side_effect[i] < min_side_effect) {
 600			min_side_effect = side_effect[i];
 601			*best = i;
 602		}
 603	}
 604
 605	if (*best == -1)
 606		return -EINVAL;
 607
 608	return side_effect[*best];
 609}
 610
 611/*
 612 * For Buck 1 ~ 5 and 7. If it is not controlled by GPIO, this calls
 613 * max8997_set_voltage_ldobuck to do the job.
 614 */
 615static int max8997_set_voltage_buck(struct regulator_dev *rdev,
 616		int min_uV, int max_uV, unsigned *selector)
 617{
 618	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
 619	int rid = rdev_get_id(rdev);
 620	const struct voltage_map_desc *desc;
 621	int new_val, new_idx, damage, tmp_val, tmp_idx, tmp_dmg;
 622	bool gpio_dvs_mode = false;
 623
 624	if (rid < MAX8997_BUCK1 || rid > MAX8997_BUCK7)
 625		return -EINVAL;
 626
 627	switch (rid) {
 628	case MAX8997_BUCK1:
 629		if (max8997->buck1_gpiodvs)
 630			gpio_dvs_mode = true;
 631		break;
 632	case MAX8997_BUCK2:
 633		if (max8997->buck2_gpiodvs)
 634			gpio_dvs_mode = true;
 635		break;
 636	case MAX8997_BUCK5:
 637		if (max8997->buck5_gpiodvs)
 638			gpio_dvs_mode = true;
 639		break;
 640	}
 641
 642	if (!gpio_dvs_mode)
 643		return max8997_set_voltage_ldobuck(rdev, min_uV, max_uV,
 644						selector);
 645
 646	desc = reg_voltage_map[rid];
 647	new_val = max8997_get_voltage_proper_val(desc, min_uV, max_uV);
 648	if (new_val < 0)
 649		return new_val;
 650
 651	tmp_dmg = INT_MAX;
 652	tmp_idx = -1;
 653	tmp_val = -1;
 654	do {
 655		damage = max8997_assess_side_effect(rdev, new_val, &new_idx);
 656		if (damage == 0)
 657			goto out;
 658
 659		if (tmp_dmg > damage) {
 660			tmp_idx = new_idx;
 661			tmp_val = new_val;
 662			tmp_dmg = damage;
 663		}
 664
 665		new_val++;
 666	} while (desc->min + desc->step * new_val <= desc->max);
 667
 668	new_idx = tmp_idx;
 669	new_val = tmp_val;
 670
 671	if (max8997->ignore_gpiodvs_side_effect == false)
 672		return -EINVAL;
 673
 674	dev_warn(&rdev->dev,
 675		"MAX8997 GPIO-DVS Side Effect Warning: GPIO SET:  %d -> %d\n",
 676		max8997->buck125_gpioindex, tmp_idx);
 677
 678out:
 679	if (new_idx < 0 || new_val < 0)
 680		return -EINVAL;
 681
 682	max8997->buck125_gpioindex = new_idx;
 683	max8997_set_gpio(max8997);
 684	*selector = new_val;
 685
 686	return 0;
 687}
 688
 689/* For SAFEOUT1 and SAFEOUT2 */
 690static int max8997_set_voltage_safeout_sel(struct regulator_dev *rdev,
 691					   unsigned selector)
 692{
 693	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
 694	struct i2c_client *i2c = max8997->iodev->i2c;
 695	int rid = rdev_get_id(rdev);
 696	int reg, shift = 0, mask, ret;
 697
 698	if (rid != MAX8997_ESAFEOUT1 && rid != MAX8997_ESAFEOUT2)
 699		return -EINVAL;
 700
 701	ret = max8997_get_voltage_register(rdev, &reg, &shift, &mask);
 702	if (ret)
 703		return ret;
 704
 705	return max8997_update_reg(i2c, reg, selector << shift, mask << shift);
 706}
 707
 708static int max8997_reg_disable_suspend(struct regulator_dev *rdev)
 709{
 710	struct max8997_data *max8997 = rdev_get_drvdata(rdev);
 711	struct i2c_client *i2c = max8997->iodev->i2c;
 712	int ret, reg, mask, pattern;
 713	int rid = rdev_get_id(rdev);
 714
 715	ret = max8997_get_enable_register(rdev, &reg, &mask, &pattern);
 716	if (ret)
 717		return ret;
 718
 719	max8997_read_reg(i2c, reg, &max8997->saved_states[rid]);
 720
 721	if (rid == MAX8997_LDO1 ||
 722			rid == MAX8997_LDO10 ||
 723			rid == MAX8997_LDO21) {
 724		dev_dbg(&rdev->dev, "Conditional Power-Off for %s\n",
 725				rdev->desc->name);
 726		return max8997_update_reg(i2c, reg, 0x40, mask);
 727	}
 728
 729	dev_dbg(&rdev->dev, "Full Power-Off for %s (%xh -> %xh)\n",
 730			rdev->desc->name, max8997->saved_states[rid] & mask,
 731			(~pattern) & mask);
 732	return max8997_update_reg(i2c, reg, ~pattern, mask);
 733}
 734
 735static const struct regulator_ops max8997_ldo_ops = {
 736	.list_voltage		= max8997_list_voltage,
 737	.is_enabled		= max8997_reg_is_enabled,
 738	.enable			= max8997_reg_enable,
 739	.disable		= max8997_reg_disable,
 740	.get_voltage_sel	= max8997_get_voltage_sel,
 741	.set_voltage		= max8997_set_voltage_ldobuck,
 742	.set_suspend_disable	= max8997_reg_disable_suspend,
 743};
 744
 745static const struct regulator_ops max8997_buck_ops = {
 746	.list_voltage		= max8997_list_voltage,
 747	.is_enabled		= max8997_reg_is_enabled,
 748	.enable			= max8997_reg_enable,
 749	.disable		= max8997_reg_disable,
 750	.get_voltage_sel	= max8997_get_voltage_sel,
 751	.set_voltage		= max8997_set_voltage_buck,
 752	.set_voltage_time_sel	= max8997_set_voltage_buck_time_sel,
 753	.set_suspend_disable	= max8997_reg_disable_suspend,
 754};
 755
 756static const struct regulator_ops max8997_fixedvolt_ops = {
 757	.list_voltage		= max8997_list_voltage,
 758	.is_enabled		= max8997_reg_is_enabled,
 759	.enable			= max8997_reg_enable,
 760	.disable		= max8997_reg_disable,
 761	.set_suspend_disable	= max8997_reg_disable_suspend,
 762};
 763
 764static const struct regulator_ops max8997_safeout_ops = {
 765	.list_voltage		= regulator_list_voltage_table,
 766	.is_enabled		= max8997_reg_is_enabled,
 767	.enable			= max8997_reg_enable,
 768	.disable		= max8997_reg_disable,
 769	.get_voltage_sel	= max8997_get_voltage_sel,
 770	.set_voltage_sel	= max8997_set_voltage_safeout_sel,
 771	.set_suspend_disable	= max8997_reg_disable_suspend,
 772};
 773
 774static const struct regulator_ops max8997_fixedstate_ops = {
 775	.list_voltage		= max8997_list_voltage_charger_cv,
 776	.get_voltage_sel	= max8997_get_voltage_sel,
 777	.set_voltage		= max8997_set_voltage_charger_cv,
 778};
 779
 780static int max8997_set_current_limit(struct regulator_dev *rdev,
 781				     int min_uA, int max_uA)
 782{
 783	unsigned dummy;
 784	int rid = rdev_get_id(rdev);
 785
 786	if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF)
 787		return -EINVAL;
 788
 789	/* Reuse max8997_set_voltage_ldobuck to set current_limit. */
 790	return max8997_set_voltage_ldobuck(rdev, min_uA, max_uA, &dummy);
 791}
 792
 793static int max8997_get_current_limit(struct regulator_dev *rdev)
 794{
 795	int sel, rid = rdev_get_id(rdev);
 796
 797	if (rid != MAX8997_CHARGER && rid != MAX8997_CHARGER_TOPOFF)
 798		return -EINVAL;
 799
 800	sel = max8997_get_voltage_sel(rdev);
 801	if (sel < 0)
 802		return sel;
 803
 804	/* Reuse max8997_list_voltage to get current_limit. */
 805	return max8997_list_voltage(rdev, sel);
 806}
 807
 808static const struct regulator_ops max8997_charger_ops = {
 809	.is_enabled		= max8997_reg_is_enabled,
 810	.enable			= max8997_reg_enable,
 811	.disable		= max8997_reg_disable,
 812	.get_current_limit	= max8997_get_current_limit,
 813	.set_current_limit	= max8997_set_current_limit,
 814};
 815
 816static const struct regulator_ops max8997_charger_fixedstate_ops = {
 817	.get_current_limit	= max8997_get_current_limit,
 818	.set_current_limit	= max8997_set_current_limit,
 819};
 820
 821#define MAX8997_VOLTAGE_REGULATOR(_name, _ops) {\
 822	.name		= #_name,		\
 823	.id		= MAX8997_##_name,	\
 824	.ops		= &_ops,		\
 825	.type		= REGULATOR_VOLTAGE,	\
 826	.owner		= THIS_MODULE,		\
 827}
 828
 829#define MAX8997_CURRENT_REGULATOR(_name, _ops) {\
 830	.name		= #_name,		\
 831	.id		= MAX8997_##_name,	\
 832	.ops		= &_ops,		\
 833	.type		= REGULATOR_CURRENT,	\
 834	.owner		= THIS_MODULE,		\
 835}
 836
 837static struct regulator_desc regulators[] = {
 838	MAX8997_VOLTAGE_REGULATOR(LDO1, max8997_ldo_ops),
 839	MAX8997_VOLTAGE_REGULATOR(LDO2, max8997_ldo_ops),
 840	MAX8997_VOLTAGE_REGULATOR(LDO3, max8997_ldo_ops),
 841	MAX8997_VOLTAGE_REGULATOR(LDO4, max8997_ldo_ops),
 842	MAX8997_VOLTAGE_REGULATOR(LDO5, max8997_ldo_ops),
 843	MAX8997_VOLTAGE_REGULATOR(LDO6, max8997_ldo_ops),
 844	MAX8997_VOLTAGE_REGULATOR(LDO7, max8997_ldo_ops),
 845	MAX8997_VOLTAGE_REGULATOR(LDO8, max8997_ldo_ops),
 846	MAX8997_VOLTAGE_REGULATOR(LDO9, max8997_ldo_ops),
 847	MAX8997_VOLTAGE_REGULATOR(LDO10, max8997_ldo_ops),
 848	MAX8997_VOLTAGE_REGULATOR(LDO11, max8997_ldo_ops),
 849	MAX8997_VOLTAGE_REGULATOR(LDO12, max8997_ldo_ops),
 850	MAX8997_VOLTAGE_REGULATOR(LDO13, max8997_ldo_ops),
 851	MAX8997_VOLTAGE_REGULATOR(LDO14, max8997_ldo_ops),
 852	MAX8997_VOLTAGE_REGULATOR(LDO15, max8997_ldo_ops),
 853	MAX8997_VOLTAGE_REGULATOR(LDO16, max8997_ldo_ops),
 854	MAX8997_VOLTAGE_REGULATOR(LDO17, max8997_ldo_ops),
 855	MAX8997_VOLTAGE_REGULATOR(LDO18, max8997_ldo_ops),
 856	MAX8997_VOLTAGE_REGULATOR(LDO21, max8997_ldo_ops),
 857	MAX8997_VOLTAGE_REGULATOR(BUCK1, max8997_buck_ops),
 858	MAX8997_VOLTAGE_REGULATOR(BUCK2, max8997_buck_ops),
 859	MAX8997_VOLTAGE_REGULATOR(BUCK3, max8997_buck_ops),
 860	MAX8997_VOLTAGE_REGULATOR(BUCK4, max8997_buck_ops),
 861	MAX8997_VOLTAGE_REGULATOR(BUCK5, max8997_buck_ops),
 862	MAX8997_VOLTAGE_REGULATOR(BUCK6, max8997_fixedvolt_ops),
 863	MAX8997_VOLTAGE_REGULATOR(BUCK7, max8997_buck_ops),
 864	MAX8997_VOLTAGE_REGULATOR(EN32KHZ_AP, max8997_fixedvolt_ops),
 865	MAX8997_VOLTAGE_REGULATOR(EN32KHZ_CP, max8997_fixedvolt_ops),
 866	MAX8997_VOLTAGE_REGULATOR(ENVICHG, max8997_fixedvolt_ops),
 867	MAX8997_VOLTAGE_REGULATOR(ESAFEOUT1, max8997_safeout_ops),
 868	MAX8997_VOLTAGE_REGULATOR(ESAFEOUT2, max8997_safeout_ops),
 869	MAX8997_VOLTAGE_REGULATOR(CHARGER_CV, max8997_fixedstate_ops),
 870	MAX8997_CURRENT_REGULATOR(CHARGER, max8997_charger_ops),
 871	MAX8997_CURRENT_REGULATOR(CHARGER_TOPOFF,
 872				  max8997_charger_fixedstate_ops),
 873};
 874
 875#ifdef CONFIG_OF
 876static int max8997_pmic_dt_parse_dvs_gpio(struct platform_device *pdev,
 877			struct max8997_platform_data *pdata,
 878			struct device_node *pmic_np)
 879{
 880	int i, gpio;
 881
 882	for (i = 0; i < 3; i++) {
 883		gpio = of_get_named_gpio(pmic_np,
 884					"max8997,pmic-buck125-dvs-gpios", i);
 885		if (!gpio_is_valid(gpio)) {
 886			dev_err(&pdev->dev, "invalid gpio[%d]: %d\n", i, gpio);
 887			return -EINVAL;
 888		}
 889		pdata->buck125_gpios[i] = gpio;
 890	}
 891	return 0;
 892}
 893
 894static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev,
 895					struct max8997_platform_data *pdata)
 896{
 897	struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
 898	struct device_node *pmic_np, *regulators_np, *reg_np;
 899	struct max8997_regulator_data *rdata;
 900	unsigned int i, dvs_voltage_nr = 1, ret;
 901
 902	pmic_np = iodev->dev->of_node;
 903	if (!pmic_np) {
 904		dev_err(&pdev->dev, "could not find pmic sub-node\n");
 905		return -ENODEV;
 906	}
 907
 908	regulators_np = of_get_child_by_name(pmic_np, "regulators");
 
 909	if (!regulators_np) {
 910		dev_err(&pdev->dev, "could not find regulators sub-node\n");
 911		return -EINVAL;
 912	}
 913
 914	/* count the number of regulators to be supported in pmic */
 915	pdata->num_regulators = of_get_child_count(regulators_np);
 916
 917	rdata = devm_kcalloc(&pdev->dev,
 918			     pdata->num_regulators, sizeof(*rdata),
 919			     GFP_KERNEL);
 920	if (!rdata) {
 921		of_node_put(regulators_np);
 922		return -ENOMEM;
 923	}
 924
 925	pdata->regulators = rdata;
 926	for_each_child_of_node(regulators_np, reg_np) {
 927		for (i = 0; i < ARRAY_SIZE(regulators); i++)
 928			if (of_node_name_eq(reg_np, regulators[i].name))
 929				break;
 930
 931		if (i == ARRAY_SIZE(regulators)) {
 932			dev_warn(&pdev->dev, "don't know how to configure regulator %pOFn\n",
 933				 reg_np);
 934			continue;
 935		}
 936
 937		rdata->id = i;
 938		rdata->initdata = of_get_regulator_init_data(&pdev->dev,
 939							     reg_np,
 940							     &regulators[i]);
 941		rdata->reg_node = reg_np;
 942		rdata++;
 943	}
 944	of_node_put(regulators_np);
 945
 946	if (of_get_property(pmic_np, "max8997,pmic-buck1-uses-gpio-dvs", NULL))
 947		pdata->buck1_gpiodvs = true;
 948
 949	if (of_get_property(pmic_np, "max8997,pmic-buck2-uses-gpio-dvs", NULL))
 950		pdata->buck2_gpiodvs = true;
 951
 952	if (of_get_property(pmic_np, "max8997,pmic-buck5-uses-gpio-dvs", NULL))
 953		pdata->buck5_gpiodvs = true;
 954
 955	if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
 956						pdata->buck5_gpiodvs) {
 957		ret = max8997_pmic_dt_parse_dvs_gpio(pdev, pdata, pmic_np);
 958		if (ret)
 959			return -EINVAL;
 960
 961		if (of_property_read_u32(pmic_np,
 962				"max8997,pmic-buck125-default-dvs-idx",
 963				&pdata->buck125_default_idx)) {
 964			pdata->buck125_default_idx = 0;
 965		} else {
 966			if (pdata->buck125_default_idx >= 8) {
 967				pdata->buck125_default_idx = 0;
 968				dev_info(&pdev->dev, "invalid value for default dvs index, using 0 instead\n");
 969			}
 970		}
 971
 972		if (of_get_property(pmic_np,
 973			"max8997,pmic-ignore-gpiodvs-side-effect", NULL))
 974			pdata->ignore_gpiodvs_side_effect = true;
 975
 976		dvs_voltage_nr = 8;
 977	}
 978
 979	if (of_property_read_u32_array(pmic_np,
 980				"max8997,pmic-buck1-dvs-voltage",
 981				pdata->buck1_voltage, dvs_voltage_nr)) {
 982		dev_err(&pdev->dev, "buck1 voltages not specified\n");
 983		return -EINVAL;
 984	}
 985
 986	if (of_property_read_u32_array(pmic_np,
 987				"max8997,pmic-buck2-dvs-voltage",
 988				pdata->buck2_voltage, dvs_voltage_nr)) {
 989		dev_err(&pdev->dev, "buck2 voltages not specified\n");
 990		return -EINVAL;
 991	}
 992
 993	if (of_property_read_u32_array(pmic_np,
 994				"max8997,pmic-buck5-dvs-voltage",
 995				pdata->buck5_voltage, dvs_voltage_nr)) {
 996		dev_err(&pdev->dev, "buck5 voltages not specified\n");
 997		return -EINVAL;
 998	}
 999
1000	return 0;
1001}
1002#else
1003static int max8997_pmic_dt_parse_pdata(struct platform_device *pdev,
1004					struct max8997_platform_data *pdata)
1005{
1006	return 0;
1007}
1008#endif /* CONFIG_OF */
1009
1010static int max8997_pmic_probe(struct platform_device *pdev)
1011{
1012	struct max8997_dev *iodev = dev_get_drvdata(pdev->dev.parent);
1013	struct max8997_platform_data *pdata = iodev->pdata;
1014	struct regulator_config config = { };
1015	struct regulator_dev *rdev;
1016	struct max8997_data *max8997;
1017	struct i2c_client *i2c;
1018	int i, ret, nr_dvs;
1019	u8 max_buck1 = 0, max_buck2 = 0, max_buck5 = 0;
1020
1021	if (!pdata) {
1022		dev_err(&pdev->dev, "No platform init data supplied.\n");
1023		return -ENODEV;
1024	}
1025
1026	if (iodev->dev->of_node) {
1027		ret = max8997_pmic_dt_parse_pdata(pdev, pdata);
1028		if (ret)
1029			return ret;
1030	}
1031
1032	max8997 = devm_kzalloc(&pdev->dev, sizeof(struct max8997_data),
1033			       GFP_KERNEL);
1034	if (!max8997)
1035		return -ENOMEM;
1036
1037	max8997->dev = &pdev->dev;
1038	max8997->iodev = iodev;
1039	max8997->num_regulators = pdata->num_regulators;
1040	platform_set_drvdata(pdev, max8997);
1041	i2c = max8997->iodev->i2c;
1042
1043	max8997->buck125_gpioindex = pdata->buck125_default_idx;
1044	max8997->buck1_gpiodvs = pdata->buck1_gpiodvs;
1045	max8997->buck2_gpiodvs = pdata->buck2_gpiodvs;
1046	max8997->buck5_gpiodvs = pdata->buck5_gpiodvs;
1047	memcpy(max8997->buck125_gpios, pdata->buck125_gpios, sizeof(int) * 3);
1048	max8997->ignore_gpiodvs_side_effect = pdata->ignore_gpiodvs_side_effect;
1049
1050	nr_dvs = (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
1051			pdata->buck5_gpiodvs) ? 8 : 1;
1052
1053	for (i = 0; i < nr_dvs; i++) {
1054		max8997->buck1_vol[i] = ret =
1055			max8997_get_voltage_proper_val(
1056					&buck1245_voltage_map_desc,
1057					pdata->buck1_voltage[i],
1058					pdata->buck1_voltage[i] +
1059					buck1245_voltage_map_desc.step);
1060		if (ret < 0)
1061			return ret;
1062
1063		max8997->buck2_vol[i] = ret =
1064			max8997_get_voltage_proper_val(
1065					&buck1245_voltage_map_desc,
1066					pdata->buck2_voltage[i],
1067					pdata->buck2_voltage[i] +
1068					buck1245_voltage_map_desc.step);
1069		if (ret < 0)
1070			return ret;
1071
1072		max8997->buck5_vol[i] = ret =
1073			max8997_get_voltage_proper_val(
1074					&buck1245_voltage_map_desc,
1075					pdata->buck5_voltage[i],
1076					pdata->buck5_voltage[i] +
1077					buck1245_voltage_map_desc.step);
1078		if (ret < 0)
1079			return ret;
1080
1081		if (max_buck1 < max8997->buck1_vol[i])
1082			max_buck1 = max8997->buck1_vol[i];
1083		if (max_buck2 < max8997->buck2_vol[i])
1084			max_buck2 = max8997->buck2_vol[i];
1085		if (max_buck5 < max8997->buck5_vol[i])
1086			max_buck5 = max8997->buck5_vol[i];
1087	}
1088
1089	/* For the safety, set max voltage before setting up */
1090	for (i = 0; i < 8; i++) {
1091		max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
1092				max_buck1, 0x3f);
1093		max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
1094				max_buck2, 0x3f);
1095		max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
1096				max_buck5, 0x3f);
1097	}
1098
1099	/* Initialize all the DVS related BUCK registers */
1100	for (i = 0; i < nr_dvs; i++) {
1101		max8997_update_reg(i2c, MAX8997_REG_BUCK1DVS1 + i,
1102				max8997->buck1_vol[i],
1103				0x3f);
1104		max8997_update_reg(i2c, MAX8997_REG_BUCK2DVS1 + i,
1105				max8997->buck2_vol[i],
1106				0x3f);
1107		max8997_update_reg(i2c, MAX8997_REG_BUCK5DVS1 + i,
1108				max8997->buck5_vol[i],
1109				0x3f);
1110	}
1111
1112	/*
1113	 * If buck 1, 2, and 5 do not care DVS GPIO settings, ignore them.
1114	 * If at least one of them cares, set gpios.
1115	 */
1116	if (pdata->buck1_gpiodvs || pdata->buck2_gpiodvs ||
1117			pdata->buck5_gpiodvs) {
 
1118
1119		if (!gpio_is_valid(pdata->buck125_gpios[0]) ||
1120				!gpio_is_valid(pdata->buck125_gpios[1]) ||
1121				!gpio_is_valid(pdata->buck125_gpios[2])) {
1122			dev_err(&pdev->dev, "GPIO NOT VALID\n");
1123			return -EINVAL;
1124		}
1125
1126		ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[0],
1127					"MAX8997 SET1");
1128		if (ret)
1129			return ret;
1130
1131		ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[1],
1132					"MAX8997 SET2");
1133		if (ret)
1134			return ret;
1135
1136		ret = devm_gpio_request(&pdev->dev, pdata->buck125_gpios[2],
1137				"MAX8997 SET3");
1138		if (ret)
1139			return ret;
1140
1141		gpio_direction_output(pdata->buck125_gpios[0],
1142				(max8997->buck125_gpioindex >> 2)
1143				& 0x1); /* SET1 */
1144		gpio_direction_output(pdata->buck125_gpios[1],
1145				(max8997->buck125_gpioindex >> 1)
1146				& 0x1); /* SET2 */
1147		gpio_direction_output(pdata->buck125_gpios[2],
1148				(max8997->buck125_gpioindex >> 0)
1149				& 0x1); /* SET3 */
 
 
1150	}
1151
1152	/* DVS-GPIO disabled */
1153	max8997_update_reg(i2c, MAX8997_REG_BUCK1CTRL, (pdata->buck1_gpiodvs) ?
1154			(1 << 1) : (0 << 1), 1 << 1);
1155	max8997_update_reg(i2c, MAX8997_REG_BUCK2CTRL, (pdata->buck2_gpiodvs) ?
1156			(1 << 1) : (0 << 1), 1 << 1);
1157	max8997_update_reg(i2c, MAX8997_REG_BUCK5CTRL, (pdata->buck5_gpiodvs) ?
1158			(1 << 1) : (0 << 1), 1 << 1);
1159
1160	/* Misc Settings */
1161	max8997->ramp_delay = 10; /* set 10mV/us, which is the default */
1162	max8997_write_reg(i2c, MAX8997_REG_BUCKRAMP, (0xf << 4) | 0x9);
1163
1164	for (i = 0; i < pdata->num_regulators; i++) {
1165		const struct voltage_map_desc *desc;
1166		int id = pdata->regulators[i].id;
1167
1168		desc = reg_voltage_map[id];
1169		if (desc) {
1170			regulators[id].n_voltages =
1171				(desc->max - desc->min) / desc->step + 1;
1172		} else if (id == MAX8997_ESAFEOUT1 || id == MAX8997_ESAFEOUT2) {
1173			regulators[id].volt_table = safeoutvolt;
1174			regulators[id].n_voltages = ARRAY_SIZE(safeoutvolt);
1175		} else if (id == MAX8997_CHARGER_CV) {
1176			regulators[id].n_voltages = 16;
1177		}
1178
1179		config.dev = max8997->dev;
1180		config.init_data = pdata->regulators[i].initdata;
1181		config.driver_data = max8997;
1182		config.of_node = pdata->regulators[i].reg_node;
1183
1184		rdev = devm_regulator_register(&pdev->dev, &regulators[id],
1185					       &config);
1186		if (IS_ERR(rdev)) {
1187			dev_err(max8997->dev, "regulator init failed for %d\n",
1188					id);
1189			return PTR_ERR(rdev);
1190		}
1191	}
1192
1193	return 0;
1194}
1195
1196static const struct platform_device_id max8997_pmic_id[] = {
1197	{ "max8997-pmic", 0},
1198	{ },
1199};
1200MODULE_DEVICE_TABLE(platform, max8997_pmic_id);
1201
1202static struct platform_driver max8997_pmic_driver = {
1203	.driver = {
1204		.name = "max8997-pmic",
 
1205	},
1206	.probe = max8997_pmic_probe,
1207	.id_table = max8997_pmic_id,
1208};
1209
1210static int __init max8997_pmic_init(void)
1211{
1212	return platform_driver_register(&max8997_pmic_driver);
1213}
1214subsys_initcall(max8997_pmic_init);
1215
1216static void __exit max8997_pmic_cleanup(void)
1217{
1218	platform_driver_unregister(&max8997_pmic_driver);
1219}
1220module_exit(max8997_pmic_cleanup);
1221
1222MODULE_DESCRIPTION("MAXIM 8997/8966 Regulator Driver");
1223MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
1224MODULE_LICENSE("GPL");