1// SPDX-License-Identifier: GPL-2.0
   2// Copyright (C) 2018 ROHM Semiconductors
   3// bd71837-regulator.c ROHM BD71837MWV/BD71847MWV regulator driver
   4
   5#include <linux/cleanup.h>
   6#include <linux/delay.h>
   7#include <linux/err.h>
   8#include <linux/interrupt.h>
   9#include <linux/kernel.h>
  10#include <linux/mfd/rohm-bd718x7.h>
  11#include <linux/module.h>
  12#include <linux/of.h>
  13#include <linux/platform_device.h>
  14#include <linux/regulator/driver.h>
  15#include <linux/regulator/machine.h>
  16#include <linux/regulator/of_regulator.h>
  17#include <linux/slab.h>
  18
  19/* Typical regulator startup times as per data sheet in uS */
  20#define BD71847_BUCK1_STARTUP_TIME 144
  21#define BD71847_BUCK2_STARTUP_TIME 162
  22#define BD71847_BUCK3_STARTUP_TIME 162
  23#define BD71847_BUCK4_STARTUP_TIME 240
  24#define BD71847_BUCK5_STARTUP_TIME 270
  25#define BD71847_BUCK6_STARTUP_TIME 200
  26#define BD71847_LDO1_STARTUP_TIME  440
  27#define BD71847_LDO2_STARTUP_TIME  370
  28#define BD71847_LDO3_STARTUP_TIME  310
  29#define BD71847_LDO4_STARTUP_TIME  400
  30#define BD71847_LDO5_STARTUP_TIME  530
  31#define BD71847_LDO6_STARTUP_TIME  400
  32
  33#define BD71837_BUCK1_STARTUP_TIME 160
  34#define BD71837_BUCK2_STARTUP_TIME 180
  35#define BD71837_BUCK3_STARTUP_TIME 180
  36#define BD71837_BUCK4_STARTUP_TIME 180
  37#define BD71837_BUCK5_STARTUP_TIME 160
  38#define BD71837_BUCK6_STARTUP_TIME 240
  39#define BD71837_BUCK7_STARTUP_TIME 220
  40#define BD71837_BUCK8_STARTUP_TIME 200
  41#define BD71837_LDO1_STARTUP_TIME  440
  42#define BD71837_LDO2_STARTUP_TIME  370
  43#define BD71837_LDO3_STARTUP_TIME  310
  44#define BD71837_LDO4_STARTUP_TIME  400
  45#define BD71837_LDO5_STARTUP_TIME  310
  46#define BD71837_LDO6_STARTUP_TIME  400
  47#define BD71837_LDO7_STARTUP_TIME  530
  48
  49/*
  50 * BD718(37/47/50) have two "enable control modes". ON/OFF can either be
  51 * controlled by software - or by PMIC internal HW state machine. Whether
  52 * regulator should be under SW or HW control can be defined from device-tree.
  53 * Let's provide separate ops for regulators to use depending on the "enable
  54 * control mode".
  55 */
  56#define BD718XX_HWOPNAME(swopname) swopname##_hwcontrol
  57
  58#define BD718XX_OPS(name, _list_voltage, _map_voltage, _set_voltage_sel, \
  59		   _get_voltage_sel, _set_voltage_time_sel, _set_ramp_delay, \
  60		   _set_uvp, _set_ovp)				\
  61static const struct regulator_ops name = {			\
  62	.enable = regulator_enable_regmap,			\
  63	.disable = regulator_disable_regmap,			\
  64	.is_enabled = regulator_is_enabled_regmap,		\
  65	.list_voltage = (_list_voltage),			\
  66	.map_voltage = (_map_voltage),				\
  67	.set_voltage_sel = (_set_voltage_sel),			\
  68	.get_voltage_sel = (_get_voltage_sel),			\
  69	.set_voltage_time_sel = (_set_voltage_time_sel),	\
  70	.set_ramp_delay = (_set_ramp_delay),			\
  71	.set_under_voltage_protection = (_set_uvp),		\
  72	.set_over_voltage_protection = (_set_ovp),		\
  73};								\
  74								\
  75static const struct regulator_ops BD718XX_HWOPNAME(name) = {	\
  76	.is_enabled = always_enabled_by_hwstate,		\
  77	.list_voltage = (_list_voltage),			\
  78	.map_voltage = (_map_voltage),				\
  79	.set_voltage_sel = (_set_voltage_sel),			\
  80	.get_voltage_sel = (_get_voltage_sel),			\
  81	.set_voltage_time_sel = (_set_voltage_time_sel),	\
  82	.set_ramp_delay = (_set_ramp_delay),			\
  83	.set_under_voltage_protection = (_set_uvp),		\
  84	.set_over_voltage_protection = (_set_ovp),		\
  85}								\
  86
  87/*
  88 * BUCK1/2/3/4
  89 * BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting
  90 * 00: 10.00mV/usec 10mV 1uS
  91 * 01: 5.00mV/usec	10mV 2uS
  92 * 10: 2.50mV/usec	10mV 4uS
  93 * 11: 1.25mV/usec	10mV 8uS
  94 */
  95static const unsigned int bd718xx_ramp_delay[] = { 10000, 5000, 2500, 1250 };
  96
  97/* These functions are used when regulators are under HW state machine control.
  98 * We assume PMIC is in RUN state because SW running and able to query the
  99 * status. Most of the regulators have fixed ON or OFF state at RUN/IDLE so for
 100 * them we just return a constant. BD71837 BUCK3 and BUCK4 are exceptions as
 101 * they support configuring the ON/OFF state for RUN.
 102 *
 103 * Note for next hacker - these PMICs have a register where the HW state can be
 104 * read. If assuming RUN appears to be false in your use-case - you can
 105 * implement state reading (although that is not going to be atomic) before
 106 * returning the enable state.
 107 */
 108static int always_enabled_by_hwstate(struct regulator_dev *rdev)
 109{
 110	return 1;
 111}
 112
 113static int never_enabled_by_hwstate(struct regulator_dev *rdev)
 114{
 115	return 0;
 116}
 117
 118static int bd71837_get_buck34_enable_hwctrl(struct regulator_dev *rdev)
 119{
 120	int ret;
 121	unsigned int val;
 122
 123	ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, &val);
 124	if (ret)
 125		return ret;
 126
 127	return !!(BD718XX_BUCK_RUN_ON & val);
 128}
 129
 130static void voltage_change_done(struct regulator_dev *rdev, unsigned int sel,
 131				unsigned int *mask)
 132{
 133	int ret;
 134
 135	if (*mask) {
 136		/*
 137		 * Let's allow scheduling as we use I2C anyways. We just need to
 138		 * guarantee minimum of 1ms sleep - it shouldn't matter if we
 139		 * exceed it due to the scheduling.
 140		 */
 141		msleep(1);
 142
 143		ret = regmap_clear_bits(rdev->regmap, BD718XX_REG_MVRFLTMASK2,
 144					 *mask);
 145		if (ret)
 146			dev_err(&rdev->dev,
 147				"Failed to re-enable voltage monitoring (%d)\n",
 148				ret);
 149	}
 150}
 151
 152static int voltage_change_prepare(struct regulator_dev *rdev, unsigned int sel,
 153				  unsigned int *mask)
 154{
 155	int ret;
 156
 157	*mask = 0;
 158	if (rdev->desc->ops->is_enabled(rdev)) {
 159		int now, new;
 160
 161		now = rdev->desc->ops->get_voltage_sel(rdev);
 162		if (now < 0)
 163			return now;
 164
 165		now = rdev->desc->ops->list_voltage(rdev, now);
 166		if (now < 0)
 167			return now;
 168
 169		new = rdev->desc->ops->list_voltage(rdev, sel);
 170		if (new < 0)
 171			return new;
 172
 173		/*
 174		 * If we increase LDO voltage when LDO is enabled we need to
 175		 * disable the power-good detection until voltage has reached
 176		 * the new level. According to HW colleagues the maximum time
 177		 * it takes is 1000us. I assume that on systems with light load
 178		 * this might be less - and we could probably use DT to give
 179		 * system specific delay value if performance matters.
 180		 *
 181		 * Well, knowing we use I2C here and can add scheduling delays
 182		 * I don't think it is worth the hassle and I just add fixed
 183		 * 1ms sleep here (and allow scheduling). If this turns out to
 184		 * be a problem we can change it to delay and make the delay
 185		 * time configurable.
 186		 */
 187		if (new > now) {
 188			int tmp;
 189			int prot_bit;
 190			int ldo_offset = rdev->desc->id - BD718XX_LDO1;
 191
 192			prot_bit = BD718XX_LDO1_VRMON80 << ldo_offset;
 193			ret = regmap_read(rdev->regmap, BD718XX_REG_MVRFLTMASK2,
 194					  &tmp);
 195			if (ret) {
 196				dev_err(&rdev->dev,
 197					"Failed to read voltage monitoring state\n");
 198				return ret;
 199			}
 200
 201			if (!(tmp & prot_bit)) {
 202				/* We disable protection if it was enabled... */
 203				ret = regmap_set_bits(rdev->regmap,
 204						      BD718XX_REG_MVRFLTMASK2,
 205						      prot_bit);
 206				/* ...and we also want to re-enable it */
 207				*mask = prot_bit;
 208			}
 209			if (ret) {
 210				dev_err(&rdev->dev,
 211					"Failed to stop voltage monitoring\n");
 212				return ret;
 213			}
 214		}
 215	}
 216
 217	return 0;
 218}
 219
 220static int bd718xx_set_voltage_sel_restricted(struct regulator_dev *rdev,
 221						    unsigned int sel)
 222{
 223	int ret;
 224	int mask;
 225
 226	ret = voltage_change_prepare(rdev, sel, &mask);
 227	if (ret)
 228		return ret;
 229
 230	ret = regulator_set_voltage_sel_regmap(rdev, sel);
 231	voltage_change_done(rdev, sel, &mask);
 232
 233	return ret;
 234}
 235
 236static int bd718xx_set_voltage_sel_pickable_restricted(
 237		struct regulator_dev *rdev, unsigned int sel)
 238{
 239	int ret;
 240	int mask;
 241
 242	ret = voltage_change_prepare(rdev, sel, &mask);
 243	if (ret)
 244		return ret;
 245
 246	ret = regulator_set_voltage_sel_pickable_regmap(rdev, sel);
 247	voltage_change_done(rdev, sel, &mask);
 248
 249	return ret;
 250}
 251
 252static int bd71837_set_voltage_sel_pickable_restricted(
 253		struct regulator_dev *rdev, unsigned int sel)
 254{
 255	if (rdev->desc->ops->is_enabled(rdev))
 256		return -EBUSY;
 257
 258	return regulator_set_voltage_sel_pickable_regmap(rdev, sel);
 259}
 260
 261/*
 262 * BD71837 BUCK1/2/3/4
 263 * BD71847 BUCK1/2
 264 * 0.70 to 1.30V (10mV step)
 265 */
 266static const struct linear_range bd718xx_dvs_buck_volts[] = {
 267	REGULATOR_LINEAR_RANGE(700000, 0x00, 0x3C, 10000),
 268	REGULATOR_LINEAR_RANGE(1300000, 0x3D, 0x3F, 0),
 269};
 270
 271/*
 272 * BD71837 BUCK5
 273 * 0.7V to 1.35V  (range 0)
 274 * and
 275 * 0.675 to 1.325 (range 1)
 276 */
 277static const struct linear_range bd71837_buck5_volts[] = {
 278	/* Ranges when VOLT_SEL bit is 0 */
 279	REGULATOR_LINEAR_RANGE(700000, 0x00, 0x03, 100000),
 280	REGULATOR_LINEAR_RANGE(1050000, 0x04, 0x05, 50000),
 281	REGULATOR_LINEAR_RANGE(1200000, 0x06, 0x07, 150000),
 282	/* Ranges when VOLT_SEL bit is 1  */
 283	REGULATOR_LINEAR_RANGE(675000, 0x0, 0x3, 100000),
 284	REGULATOR_LINEAR_RANGE(1025000, 0x4, 0x5, 50000),
 285	REGULATOR_LINEAR_RANGE(1175000, 0x6, 0x7, 150000),
 286};
 287
 288/*
 289 * Range selector for first 3 linear ranges is 0x0
 290 * and 0x1 for last 3 ranges.
 291 */
 292static const unsigned int bd71837_buck5_volt_range_sel[] = {
 293	0x0, 0x0, 0x0, 0x1, 0x1, 0x1
 294};
 295
 296/*
 297 * BD71847 BUCK3
 298 */
 299static const struct linear_range bd71847_buck3_volts[] = {
 300	/* Ranges when VOLT_SEL bits are 00 */
 301	REGULATOR_LINEAR_RANGE(700000, 0x00, 0x03, 100000),
 302	REGULATOR_LINEAR_RANGE(1050000, 0x04, 0x05, 50000),
 303	REGULATOR_LINEAR_RANGE(1200000, 0x06, 0x07, 150000),
 304	/* Ranges when VOLT_SEL bits are 01 */
 305	REGULATOR_LINEAR_RANGE(550000, 0x0, 0x7, 50000),
 306	/* Ranges when VOLT_SEL bits are 11 */
 307	REGULATOR_LINEAR_RANGE(675000, 0x0, 0x3, 100000),
 308	REGULATOR_LINEAR_RANGE(1025000, 0x4, 0x5, 50000),
 309	REGULATOR_LINEAR_RANGE(1175000, 0x6, 0x7, 150000),
 310};
 311
 312static const unsigned int bd71847_buck3_volt_range_sel[] = {
 313	0x0, 0x0, 0x0, 0x1, 0x2, 0x2, 0x2
 314};
 315
 316static const struct linear_range bd71847_buck4_volts[] = {
 317	REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
 318	REGULATOR_LINEAR_RANGE(2600000, 0x00, 0x03, 100000),
 319};
 320
 321static const unsigned int bd71847_buck4_volt_range_sel[] = { 0x0, 0x1 };
 322
 323/*
 324 * BUCK6
 325 * 3.0V to 3.3V (step 100mV)
 326 */
 327static const struct linear_range bd71837_buck6_volts[] = {
 328	REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
 329};
 330
 331/*
 332 * BD71837 BUCK7
 333 * BD71847 BUCK5
 334 * 000 = 1.605V
 335 * 001 = 1.695V
 336 * 010 = 1.755V
 337 * 011 = 1.8V (Initial)
 338 * 100 = 1.845V
 339 * 101 = 1.905V
 340 * 110 = 1.95V
 341 * 111 = 1.995V
 342 */
 343static const unsigned int bd718xx_3rd_nodvs_buck_volts[] = {
 344	1605000, 1695000, 1755000, 1800000, 1845000, 1905000, 1950000, 1995000
 345};
 346
 347/*
 348 * BUCK8
 349 * 0.8V to 1.40V (step 10mV)
 350 */
 351static const struct linear_range bd718xx_4th_nodvs_buck_volts[] = {
 352	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x3C, 10000),
 353};
 354
 355/*
 356 * LDO1
 357 * 3.0 to 3.3V (100mV step)
 358 */
 359static const struct linear_range bd718xx_ldo1_volts[] = {
 360	REGULATOR_LINEAR_RANGE(3000000, 0x00, 0x03, 100000),
 361	REGULATOR_LINEAR_RANGE(1600000, 0x00, 0x03, 100000),
 362};
 363
 364static const unsigned int bd718xx_ldo1_volt_range_sel[] = { 0x0, 0x1 };
 365
 366/*
 367 * LDO2
 368 * 0.8 or 0.9V
 369 */
 370static const unsigned int ldo_2_volts[] = {
 371	900000, 800000
 372};
 373
 374/*
 375 * LDO3
 376 * 1.8 to 3.3V (100mV step)
 377 */
 378static const struct linear_range bd718xx_ldo3_volts[] = {
 379	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
 380};
 381
 382/*
 383 * LDO4
 384 * 0.9 to 1.8V (100mV step)
 385 */
 386static const struct linear_range bd718xx_ldo4_volts[] = {
 387	REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
 388};
 389
 390/*
 391 * LDO5 for BD71837
 392 * 1.8 to 3.3V (100mV step)
 393 */
 394static const struct linear_range bd71837_ldo5_volts[] = {
 395	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
 396};
 397
 398/*
 399 * LDO5 for BD71837
 400 * 1.8 to 3.3V (100mV step)
 401 */
 402static const struct linear_range bd71847_ldo5_volts[] = {
 403	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
 404	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x0F, 100000),
 405};
 406
 407static const unsigned int bd71847_ldo5_volt_range_sel[] = { 0x0, 0x1 };
 408
 409/*
 410 * LDO6
 411 * 0.9 to 1.8V (100mV step)
 412 */
 413static const struct linear_range bd718xx_ldo6_volts[] = {
 414	REGULATOR_LINEAR_RANGE(900000, 0x00, 0x09, 100000),
 415};
 416
 417/*
 418 * LDO7
 419 * 1.8 to 3.3V (100mV step)
 420 */
 421static const struct linear_range bd71837_ldo7_volts[] = {
 422	REGULATOR_LINEAR_RANGE(1800000, 0x00, 0x0F, 100000),
 423};
 424
 425struct reg_init {
 426	unsigned int reg;
 427	unsigned int mask;
 428	unsigned int val;
 429};
 430struct bd718xx_regulator_data {
 431	struct regulator_desc desc;
 432	const struct rohm_dvs_config dvs;
 433	const struct reg_init init;
 434	const struct reg_init *additional_inits;
 435	int additional_init_amnt;
 436};
 437
 438static int bd718x7_xvp_sanity_check(struct regulator_dev *rdev, int lim_uV,
 439				    int severity)
 440{
 441	/*
 442	 * BD71837/47/50 ... (ICs supported by this driver) do not provide
 443	 * warnings, only protection
 444	 */
 445	if (severity != REGULATOR_SEVERITY_PROT) {
 446		dev_err(&rdev->dev,
 447			"Unsupported Under Voltage protection level\n");
 448		return -EINVAL;
 449	}
 450
 451	/*
 452	 * And protection limit is not changeable. It can only be enabled
 453	 * or disabled
 454	 */
 455	if (lim_uV)
 456		return -EINVAL;
 457
 458	return 0;
 459}
 460
 461static int bd718x7_set_ldo_uvp(struct regulator_dev *rdev, int lim_uV,
 462			       int severity, bool enable)
 463{
 464	int ldo_offset = rdev->desc->id - BD718XX_LDO1;
 465	int prot_bit, ret;
 466
 467	ret = bd718x7_xvp_sanity_check(rdev, lim_uV, severity);
 468	if (ret)
 469		return ret;
 470
 471	prot_bit = BD718XX_LDO1_VRMON80 << ldo_offset;
 472
 473	if (enable)
 474		return regmap_clear_bits(rdev->regmap, BD718XX_REG_MVRFLTMASK2,
 475					 prot_bit);
 476
 477	return regmap_set_bits(rdev->regmap, BD718XX_REG_MVRFLTMASK2,
 478			       prot_bit);
 479}
 480
 481static int bd718x7_get_buck_prot_reg(int id, int *reg)
 482{
 483
 484	if (id > BD718XX_BUCK8) {
 485		WARN_ON(id > BD718XX_BUCK8);
 486		return -EINVAL;
 487	}
 488
 489	if (id > BD718XX_BUCK4)
 490		*reg = BD718XX_REG_MVRFLTMASK0;
 491	else
 492		*reg = BD718XX_REG_MVRFLTMASK1;
 493
 494	return 0;
 495}
 496
 497static int bd718x7_get_buck_ovp_info(int id, int *reg, int *bit)
 498{
 499	int ret;
 500
 501	ret = bd718x7_get_buck_prot_reg(id, reg);
 502	if (ret)
 503		return ret;
 504
 505	*bit = BIT((id % 4) * 2 + 1);
 506
 507	return 0;
 508}
 509
 510static int bd718x7_get_buck_uvp_info(int id, int *reg, int *bit)
 511{
 512	int ret;
 513
 514	ret = bd718x7_get_buck_prot_reg(id, reg);
 515	if (ret)
 516		return ret;
 517
 518	*bit = BIT((id % 4) * 2);
 519
 520	return 0;
 521}
 522
 523static int bd718x7_set_buck_uvp(struct regulator_dev *rdev, int lim_uV,
 524				int severity, bool enable)
 525{
 526	int bit, reg, ret;
 527
 528	ret = bd718x7_xvp_sanity_check(rdev, lim_uV, severity);
 529	if (ret)
 530		return ret;
 531
 532	ret = bd718x7_get_buck_uvp_info(rdev->desc->id, &reg, &bit);
 533	if (ret)
 534		return ret;
 535
 536	if (enable)
 537		return regmap_clear_bits(rdev->regmap, reg, bit);
 538
 539	return regmap_set_bits(rdev->regmap, reg, bit);
 540
 541}
 542
 543static int bd718x7_set_buck_ovp(struct regulator_dev *rdev, int lim_uV,
 544				int severity,
 545				bool enable)
 546{
 547	int bit, reg, ret;
 548
 549	ret = bd718x7_xvp_sanity_check(rdev, lim_uV, severity);
 550	if (ret)
 551		return ret;
 552
 553	ret = bd718x7_get_buck_ovp_info(rdev->desc->id, &reg, &bit);
 554	if (ret)
 555		return ret;
 556
 557	if (enable)
 558		return regmap_clear_bits(rdev->regmap, reg, bit);
 559
 560	return regmap_set_bits(rdev->regmap, reg, bit);
 561}
 562
 563/*
 564 * OPS common for BD71847 and BD71850
 565 */
 566BD718XX_OPS(bd718xx_pickable_range_ldo_ops,
 567	    regulator_list_voltage_pickable_linear_range, NULL,
 568	    bd718xx_set_voltage_sel_pickable_restricted,
 569	    regulator_get_voltage_sel_pickable_regmap, NULL, NULL,
 570	    bd718x7_set_ldo_uvp, NULL);
 571
 572/* BD71847 and BD71850 LDO 5 is by default OFF at RUN state */
 573static const struct regulator_ops bd718xx_ldo5_ops_hwstate = {
 574	.is_enabled = never_enabled_by_hwstate,
 575	.list_voltage = regulator_list_voltage_pickable_linear_range,
 576	.set_voltage_sel = bd718xx_set_voltage_sel_pickable_restricted,
 577	.get_voltage_sel = regulator_get_voltage_sel_pickable_regmap,
 578	.set_under_voltage_protection = bd718x7_set_ldo_uvp,
 579};
 580
 581BD718XX_OPS(bd718xx_pickable_range_buck_ops,
 582	    regulator_list_voltage_pickable_linear_range, NULL,
 583	    regulator_set_voltage_sel_pickable_regmap,
 584	    regulator_get_voltage_sel_pickable_regmap,
 585	    regulator_set_voltage_time_sel, NULL, bd718x7_set_buck_uvp,
 586	    bd718x7_set_buck_ovp);
 587
 588BD718XX_OPS(bd718xx_ldo_regulator_ops, regulator_list_voltage_linear_range,
 589	    NULL, bd718xx_set_voltage_sel_restricted,
 590	    regulator_get_voltage_sel_regmap, NULL, NULL, bd718x7_set_ldo_uvp,
 591	    NULL);
 592
 593BD718XX_OPS(bd718xx_ldo_regulator_nolinear_ops, regulator_list_voltage_table,
 594	    NULL, bd718xx_set_voltage_sel_restricted,
 595	    regulator_get_voltage_sel_regmap, NULL, NULL, bd718x7_set_ldo_uvp,
 596	    NULL);
 597
 598BD718XX_OPS(bd718xx_buck_regulator_ops, regulator_list_voltage_linear_range,
 599	    NULL, regulator_set_voltage_sel_regmap,
 600	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
 601	    NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp);
 602
 603BD718XX_OPS(bd718xx_buck_regulator_nolinear_ops, regulator_list_voltage_table,
 604	    regulator_map_voltage_ascend, regulator_set_voltage_sel_regmap,
 605	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
 606	    NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp);
 607
 608/*
 609 * OPS for BD71837
 610 */
 611BD718XX_OPS(bd71837_pickable_range_ldo_ops,
 612	    regulator_list_voltage_pickable_linear_range, NULL,
 613	    bd71837_set_voltage_sel_pickable_restricted,
 614	    regulator_get_voltage_sel_pickable_regmap, NULL, NULL,
 615	    bd718x7_set_ldo_uvp, NULL);
 616
 617BD718XX_OPS(bd71837_pickable_range_buck_ops,
 618	    regulator_list_voltage_pickable_linear_range, NULL,
 619	    bd71837_set_voltage_sel_pickable_restricted,
 620	    regulator_get_voltage_sel_pickable_regmap,
 621	    regulator_set_voltage_time_sel, NULL, bd718x7_set_buck_uvp,
 622	    bd718x7_set_buck_ovp);
 623
 624BD718XX_OPS(bd71837_ldo_regulator_ops, regulator_list_voltage_linear_range,
 625	    NULL, rohm_regulator_set_voltage_sel_restricted,
 626	    regulator_get_voltage_sel_regmap, NULL, NULL, bd718x7_set_ldo_uvp,
 627	    NULL);
 628
 629BD718XX_OPS(bd71837_ldo_regulator_nolinear_ops, regulator_list_voltage_table,
 630	    NULL, rohm_regulator_set_voltage_sel_restricted,
 631	    regulator_get_voltage_sel_regmap, NULL, NULL, bd718x7_set_ldo_uvp,
 632	    NULL);
 633
 634BD718XX_OPS(bd71837_buck_regulator_ops, regulator_list_voltage_linear_range,
 635	    NULL, rohm_regulator_set_voltage_sel_restricted,
 636	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
 637	    NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp);
 638
 639BD718XX_OPS(bd71837_buck_regulator_nolinear_ops, regulator_list_voltage_table,
 640	    regulator_map_voltage_ascend, rohm_regulator_set_voltage_sel_restricted,
 641	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
 642	    NULL, bd718x7_set_buck_uvp, bd718x7_set_buck_ovp);
 643/*
 644 * BD71837 bucks 3 and 4 support defining their enable/disable state also
 645 * when buck enable state is under HW state machine control. In that case the
 646 * bit [2] in CTRL register is used to indicate if regulator should be ON.
 647 */
 648static const struct regulator_ops bd71837_buck34_ops_hwctrl = {
 649	.is_enabled = bd71837_get_buck34_enable_hwctrl,
 650	.list_voltage = regulator_list_voltage_linear_range,
 651	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 652	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 653	.set_voltage_time_sel = regulator_set_voltage_time_sel,
 654	.set_ramp_delay = regulator_set_ramp_delay_regmap,
 655	.set_under_voltage_protection = bd718x7_set_buck_uvp,
 656	.set_over_voltage_protection = bd718x7_set_buck_ovp,
 657};
 658
 659/*
 660 * OPS for all of the ICs - BD718(37/47/50)
 661 */
 662BD718XX_OPS(bd718xx_dvs_buck_regulator_ops, regulator_list_voltage_linear_range,
 663	    NULL, regulator_set_voltage_sel_regmap,
 664	    regulator_get_voltage_sel_regmap, regulator_set_voltage_time_sel,
 665	    regulator_set_ramp_delay_regmap, bd718x7_set_buck_uvp,
 666	    bd718x7_set_buck_ovp);
 667
 668
 669
 670/*
 671 * There is a HW quirk in BD71837. The shutdown sequence timings for
 672 * bucks/LDOs which are controlled via register interface are changed.
 673 * At PMIC poweroff the voltage for BUCK6/7 is cut immediately at the
 674 * beginning of shut-down sequence. As bucks 6 and 7 are parent
 675 * supplies for LDO5 and LDO6 - this causes LDO5/6 voltage
 676 * monitoring to errorneously detect under voltage and force PMIC to
 677 * emergency state instead of poweroff. In order to avoid this we
 678 * disable voltage monitoring for LDO5 and LDO6
 679 */
 680static const struct reg_init bd71837_ldo5_inits[] = {
 681	{
 682		.reg = BD718XX_REG_MVRFLTMASK2,
 683		.mask = BD718XX_LDO5_VRMON80,
 684		.val = BD718XX_LDO5_VRMON80,
 685	},
 686};
 687
 688static const struct reg_init bd71837_ldo6_inits[] = {
 689	{
 690		.reg = BD718XX_REG_MVRFLTMASK2,
 691		.mask = BD718XX_LDO6_VRMON80,
 692		.val = BD718XX_LDO6_VRMON80,
 693	},
 694};
 695
 696static int buck_set_hw_dvs_levels(struct device_node *np,
 697			    const struct regulator_desc *desc,
 698			    struct regulator_config *cfg)
 699{
 700	struct bd718xx_regulator_data *data;
 701
 702	data = container_of(desc, struct bd718xx_regulator_data, desc);
 703
 704	return rohm_regulator_set_dvs_levels(&data->dvs, np, desc, cfg->regmap);
 705}
 706
 707static const struct regulator_ops *bd71847_swcontrol_ops[] = {
 708	&bd718xx_dvs_buck_regulator_ops, &bd718xx_dvs_buck_regulator_ops,
 709	&bd718xx_pickable_range_buck_ops, &bd718xx_pickable_range_buck_ops,
 710	&bd718xx_buck_regulator_nolinear_ops, &bd718xx_buck_regulator_ops,
 711	&bd718xx_pickable_range_ldo_ops, &bd718xx_ldo_regulator_nolinear_ops,
 712	&bd718xx_ldo_regulator_ops, &bd718xx_ldo_regulator_ops,
 713	&bd718xx_pickable_range_ldo_ops, &bd718xx_ldo_regulator_ops,
 714};
 715
 716static const struct regulator_ops *bd71847_hwcontrol_ops[] = {
 717	&BD718XX_HWOPNAME(bd718xx_dvs_buck_regulator_ops),
 718	&BD718XX_HWOPNAME(bd718xx_dvs_buck_regulator_ops),
 719	&BD718XX_HWOPNAME(bd718xx_pickable_range_buck_ops),
 720	&BD718XX_HWOPNAME(bd718xx_pickable_range_buck_ops),
 721	&BD718XX_HWOPNAME(bd718xx_buck_regulator_nolinear_ops),
 722	&BD718XX_HWOPNAME(bd718xx_buck_regulator_ops),
 723	&BD718XX_HWOPNAME(bd718xx_pickable_range_ldo_ops),
 724	&BD718XX_HWOPNAME(bd718xx_ldo_regulator_nolinear_ops),
 725	&BD718XX_HWOPNAME(bd718xx_ldo_regulator_ops),
 726	&BD718XX_HWOPNAME(bd718xx_ldo_regulator_ops),
 727	&bd718xx_ldo5_ops_hwstate,
 728	&BD718XX_HWOPNAME(bd718xx_ldo_regulator_ops),
 729};
 730
 731static struct bd718xx_regulator_data bd71847_regulators[] = {
 732	{
 733		.desc = {
 734			.name = "buck1",
 735			.of_match = of_match_ptr("BUCK1"),
 736			.regulators_node = of_match_ptr("regulators"),
 737			.id = BD718XX_BUCK1,
 738			.type = REGULATOR_VOLTAGE,
 739			.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
 740			.linear_ranges = bd718xx_dvs_buck_volts,
 741			.n_linear_ranges =
 742				ARRAY_SIZE(bd718xx_dvs_buck_volts),
 743			.vsel_reg = BD718XX_REG_BUCK1_VOLT_RUN,
 744			.vsel_mask = DVS_BUCK_RUN_MASK,
 745			.enable_reg = BD718XX_REG_BUCK1_CTRL,
 746			.enable_mask = BD718XX_BUCK_EN,
 747			.enable_time = BD71847_BUCK1_STARTUP_TIME,
 748			.owner = THIS_MODULE,
 749			.ramp_delay_table = bd718xx_ramp_delay,
 750			.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
 751			.ramp_reg = BD718XX_REG_BUCK1_CTRL,
 752			.ramp_mask = BUCK_RAMPRATE_MASK,
 753			.of_parse_cb = buck_set_hw_dvs_levels,
 754		},
 755		.dvs = {
 756			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
 757				     ROHM_DVS_LEVEL_SUSPEND,
 758			.run_reg = BD718XX_REG_BUCK1_VOLT_RUN,
 759			.run_mask = DVS_BUCK_RUN_MASK,
 760			.idle_reg = BD718XX_REG_BUCK1_VOLT_IDLE,
 761			.idle_mask = DVS_BUCK_RUN_MASK,
 762			.suspend_reg = BD718XX_REG_BUCK1_VOLT_SUSP,
 763			.suspend_mask = DVS_BUCK_RUN_MASK,
 764		},
 765		.init = {
 766			.reg = BD718XX_REG_BUCK1_CTRL,
 767			.mask = BD718XX_BUCK_SEL,
 768			.val = BD718XX_BUCK_SEL,
 769		},
 770	},
 771	{
 772		.desc = {
 773			.name = "buck2",
 774			.of_match = of_match_ptr("BUCK2"),
 775			.regulators_node = of_match_ptr("regulators"),
 776			.id = BD718XX_BUCK2,
 777			.type = REGULATOR_VOLTAGE,
 778			.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
 779			.linear_ranges = bd718xx_dvs_buck_volts,
 780			.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
 781			.vsel_reg = BD718XX_REG_BUCK2_VOLT_RUN,
 782			.vsel_mask = DVS_BUCK_RUN_MASK,
 783			.enable_reg = BD718XX_REG_BUCK2_CTRL,
 784			.enable_mask = BD718XX_BUCK_EN,
 785			.enable_time = BD71847_BUCK2_STARTUP_TIME,
 786			.ramp_delay_table = bd718xx_ramp_delay,
 787			.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
 788			.ramp_reg = BD718XX_REG_BUCK2_CTRL,
 789			.ramp_mask = BUCK_RAMPRATE_MASK,
 790			.owner = THIS_MODULE,
 791			.of_parse_cb = buck_set_hw_dvs_levels,
 792		},
 793		.dvs = {
 794			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE,
 795			.run_reg = BD718XX_REG_BUCK2_VOLT_RUN,
 796			.run_mask = DVS_BUCK_RUN_MASK,
 797			.idle_reg = BD718XX_REG_BUCK2_VOLT_IDLE,
 798			.idle_mask = DVS_BUCK_RUN_MASK,
 799		},
 800		.init = {
 801			.reg = BD718XX_REG_BUCK2_CTRL,
 802			.mask = BD718XX_BUCK_SEL,
 803			.val = BD718XX_BUCK_SEL,
 804		},
 805	},
 806	{
 807		.desc = {
 808			.name = "buck3",
 809			.of_match = of_match_ptr("BUCK3"),
 810			.regulators_node = of_match_ptr("regulators"),
 811			.id = BD718XX_BUCK3,
 812			.type = REGULATOR_VOLTAGE,
 813			.n_voltages = BD71847_BUCK3_VOLTAGE_NUM,
 814			.linear_ranges = bd71847_buck3_volts,
 815			.n_linear_ranges =
 816				ARRAY_SIZE(bd71847_buck3_volts),
 817			.vsel_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
 818			.vsel_mask = BD718XX_1ST_NODVS_BUCK_MASK,
 819			.vsel_range_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
 820			.vsel_range_mask = BD71847_BUCK3_RANGE_MASK,
 821			.linear_range_selectors_bitfield = bd71847_buck3_volt_range_sel,
 822			.enable_reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
 823			.enable_mask = BD718XX_BUCK_EN,
 824			.enable_time = BD71847_BUCK3_STARTUP_TIME,
 825			.owner = THIS_MODULE,
 826		},
 827		.init = {
 828			.reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
 829			.mask = BD718XX_BUCK_SEL,
 830			.val = BD718XX_BUCK_SEL,
 831		},
 832	},
 833	{
 834		.desc = {
 835			.name = "buck4",
 836			.of_match = of_match_ptr("BUCK4"),
 837			.regulators_node = of_match_ptr("regulators"),
 838			.id = BD718XX_BUCK4,
 839			.type = REGULATOR_VOLTAGE,
 840			.n_voltages = BD71847_BUCK4_VOLTAGE_NUM,
 841			.linear_ranges = bd71847_buck4_volts,
 842			.n_linear_ranges =
 843				ARRAY_SIZE(bd71847_buck4_volts),
 844			.enable_reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
 845			.vsel_reg = BD718XX_REG_2ND_NODVS_BUCK_VOLT,
 846			.vsel_mask = BD71847_BUCK4_MASK,
 847			.vsel_range_reg = BD718XX_REG_2ND_NODVS_BUCK_VOLT,
 848			.vsel_range_mask = BD71847_BUCK4_RANGE_MASK,
 849			.linear_range_selectors_bitfield = bd71847_buck4_volt_range_sel,
 850			.enable_mask = BD718XX_BUCK_EN,
 851			.enable_time = BD71847_BUCK4_STARTUP_TIME,
 852			.owner = THIS_MODULE,
 853		},
 854		.init = {
 855			.reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
 856			.mask = BD718XX_BUCK_SEL,
 857			.val = BD718XX_BUCK_SEL,
 858		},
 859	},
 860	{
 861		.desc = {
 862			.name = "buck5",
 863			.of_match = of_match_ptr("BUCK5"),
 864			.regulators_node = of_match_ptr("regulators"),
 865			.id = BD718XX_BUCK5,
 866			.type = REGULATOR_VOLTAGE,
 867			.volt_table = &bd718xx_3rd_nodvs_buck_volts[0],
 868			.n_voltages = ARRAY_SIZE(bd718xx_3rd_nodvs_buck_volts),
 869			.vsel_reg = BD718XX_REG_3RD_NODVS_BUCK_VOLT,
 870			.vsel_mask = BD718XX_3RD_NODVS_BUCK_MASK,
 871			.enable_reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
 872			.enable_mask = BD718XX_BUCK_EN,
 873			.enable_time = BD71847_BUCK5_STARTUP_TIME,
 874			.owner = THIS_MODULE,
 875		},
 876		.init = {
 877			.reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
 878			.mask = BD718XX_BUCK_SEL,
 879			.val = BD718XX_BUCK_SEL,
 880		},
 881	},
 882	{
 883		.desc = {
 884			.name = "buck6",
 885			.of_match = of_match_ptr("BUCK6"),
 886			.regulators_node = of_match_ptr("regulators"),
 887			.id = BD718XX_BUCK6,
 888			.type = REGULATOR_VOLTAGE,
 889			.n_voltages = BD718XX_4TH_NODVS_BUCK_VOLTAGE_NUM,
 890			.linear_ranges = bd718xx_4th_nodvs_buck_volts,
 891			.n_linear_ranges =
 892				ARRAY_SIZE(bd718xx_4th_nodvs_buck_volts),
 893			.vsel_reg = BD718XX_REG_4TH_NODVS_BUCK_VOLT,
 894			.vsel_mask = BD718XX_4TH_NODVS_BUCK_MASK,
 895			.enable_reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
 896			.enable_mask = BD718XX_BUCK_EN,
 897			.enable_time = BD71847_BUCK6_STARTUP_TIME,
 898			.owner = THIS_MODULE,
 899		},
 900		.init = {
 901			.reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
 902			.mask = BD718XX_BUCK_SEL,
 903			.val = BD718XX_BUCK_SEL,
 904		},
 905	},
 906	{
 907		.desc = {
 908			.name = "ldo1",
 909			.of_match = of_match_ptr("LDO1"),
 910			.regulators_node = of_match_ptr("regulators"),
 911			.id = BD718XX_LDO1,
 912			.type = REGULATOR_VOLTAGE,
 913			.n_voltages = BD718XX_LDO1_VOLTAGE_NUM,
 914			.linear_ranges = bd718xx_ldo1_volts,
 915			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo1_volts),
 916			.vsel_reg = BD718XX_REG_LDO1_VOLT,
 917			.vsel_mask = BD718XX_LDO1_MASK,
 918			.vsel_range_reg = BD718XX_REG_LDO1_VOLT,
 919			.vsel_range_mask = BD718XX_LDO1_RANGE_MASK,
 920			.linear_range_selectors_bitfield = bd718xx_ldo1_volt_range_sel,
 921			.enable_reg = BD718XX_REG_LDO1_VOLT,
 922			.enable_mask = BD718XX_LDO_EN,
 923			.enable_time = BD71847_LDO1_STARTUP_TIME,
 924			.owner = THIS_MODULE,
 925		},
 926		.init = {
 927			.reg = BD718XX_REG_LDO1_VOLT,
 928			.mask = BD718XX_LDO_SEL,
 929			.val = BD718XX_LDO_SEL,
 930		},
 931	},
 932	{
 933		.desc = {
 934			.name = "ldo2",
 935			.of_match = of_match_ptr("LDO2"),
 936			.regulators_node = of_match_ptr("regulators"),
 937			.id = BD718XX_LDO2,
 938			.type = REGULATOR_VOLTAGE,
 939			.volt_table = &ldo_2_volts[0],
 940			.vsel_reg = BD718XX_REG_LDO2_VOLT,
 941			.vsel_mask = BD718XX_LDO2_MASK,
 942			.n_voltages = ARRAY_SIZE(ldo_2_volts),
 943			.enable_reg = BD718XX_REG_LDO2_VOLT,
 944			.enable_mask = BD718XX_LDO_EN,
 945			.enable_time = BD71847_LDO2_STARTUP_TIME,
 946			.owner = THIS_MODULE,
 947		},
 948		.init = {
 949			.reg = BD718XX_REG_LDO2_VOLT,
 950			.mask = BD718XX_LDO_SEL,
 951			.val = BD718XX_LDO_SEL,
 952		},
 953	},
 954	{
 955		.desc = {
 956			.name = "ldo3",
 957			.of_match = of_match_ptr("LDO3"),
 958			.regulators_node = of_match_ptr("regulators"),
 959			.id = BD718XX_LDO3,
 960			.type = REGULATOR_VOLTAGE,
 961			.n_voltages = BD718XX_LDO3_VOLTAGE_NUM,
 962			.linear_ranges = bd718xx_ldo3_volts,
 963			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo3_volts),
 964			.vsel_reg = BD718XX_REG_LDO3_VOLT,
 965			.vsel_mask = BD718XX_LDO3_MASK,
 966			.enable_reg = BD718XX_REG_LDO3_VOLT,
 967			.enable_mask = BD718XX_LDO_EN,
 968			.enable_time = BD71847_LDO3_STARTUP_TIME,
 969			.owner = THIS_MODULE,
 970		},
 971		.init = {
 972			.reg = BD718XX_REG_LDO3_VOLT,
 973			.mask = BD718XX_LDO_SEL,
 974			.val = BD718XX_LDO_SEL,
 975		},
 976	},
 977	{
 978		.desc = {
 979			.name = "ldo4",
 980			.of_match = of_match_ptr("LDO4"),
 981			.regulators_node = of_match_ptr("regulators"),
 982			.id = BD718XX_LDO4,
 983			.type = REGULATOR_VOLTAGE,
 984			.n_voltages = BD718XX_LDO4_VOLTAGE_NUM,
 985			.linear_ranges = bd718xx_ldo4_volts,
 986			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo4_volts),
 987			.vsel_reg = BD718XX_REG_LDO4_VOLT,
 988			.vsel_mask = BD718XX_LDO4_MASK,
 989			.enable_reg = BD718XX_REG_LDO4_VOLT,
 990			.enable_mask = BD718XX_LDO_EN,
 991			.enable_time = BD71847_LDO4_STARTUP_TIME,
 992			.owner = THIS_MODULE,
 993		},
 994		.init = {
 995			.reg = BD718XX_REG_LDO4_VOLT,
 996			.mask = BD718XX_LDO_SEL,
 997			.val = BD718XX_LDO_SEL,
 998		},
 999	},
1000	{
1001		.desc = {
1002			.name = "ldo5",
1003			.of_match = of_match_ptr("LDO5"),
1004			.regulators_node = of_match_ptr("regulators"),
1005			.id = BD718XX_LDO5,
1006			.type = REGULATOR_VOLTAGE,
1007			.n_voltages = BD71847_LDO5_VOLTAGE_NUM,
1008			.linear_ranges = bd71847_ldo5_volts,
1009			.n_linear_ranges = ARRAY_SIZE(bd71847_ldo5_volts),
1010			.vsel_reg = BD718XX_REG_LDO5_VOLT,
1011			.vsel_mask = BD71847_LDO5_MASK,
1012			.vsel_range_reg = BD718XX_REG_LDO5_VOLT,
1013			.vsel_range_mask = BD71847_LDO5_RANGE_MASK,
1014			.linear_range_selectors_bitfield = bd71847_ldo5_volt_range_sel,
1015			.enable_reg = BD718XX_REG_LDO5_VOLT,
1016			.enable_mask = BD718XX_LDO_EN,
1017			.enable_time = BD71847_LDO5_STARTUP_TIME,
1018			.owner = THIS_MODULE,
1019		},
1020		.init = {
1021			.reg = BD718XX_REG_LDO5_VOLT,
1022			.mask = BD718XX_LDO_SEL,
1023			.val = BD718XX_LDO_SEL,
1024		},
1025	},
1026	{
1027		.desc = {
1028			.name = "ldo6",
1029			.of_match = of_match_ptr("LDO6"),
1030			.regulators_node = of_match_ptr("regulators"),
1031			.id = BD718XX_LDO6,
1032			.type = REGULATOR_VOLTAGE,
1033			.n_voltages = BD718XX_LDO6_VOLTAGE_NUM,
1034			.linear_ranges = bd718xx_ldo6_volts,
1035			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo6_volts),
1036			/* LDO6 is supplied by buck5 */
1037			.supply_name = "buck5",
1038			.vsel_reg = BD718XX_REG_LDO6_VOLT,
1039			.vsel_mask = BD718XX_LDO6_MASK,
1040			.enable_reg = BD718XX_REG_LDO6_VOLT,
1041			.enable_mask = BD718XX_LDO_EN,
1042			.enable_time = BD71847_LDO6_STARTUP_TIME,
1043			.owner = THIS_MODULE,
1044		},
1045		.init = {
1046			.reg = BD718XX_REG_LDO6_VOLT,
1047			.mask = BD718XX_LDO_SEL,
1048			.val = BD718XX_LDO_SEL,
1049		},
1050	},
1051};
1052
1053static const struct regulator_ops *bd71837_swcontrol_ops[] = {
1054	&bd718xx_dvs_buck_regulator_ops, &bd718xx_dvs_buck_regulator_ops,
1055	&bd718xx_dvs_buck_regulator_ops, &bd718xx_dvs_buck_regulator_ops,
1056	&bd71837_pickable_range_buck_ops, &bd71837_buck_regulator_ops,
1057	&bd71837_buck_regulator_nolinear_ops, &bd71837_buck_regulator_ops,
1058	&bd71837_pickable_range_ldo_ops, &bd71837_ldo_regulator_nolinear_ops,
1059	&bd71837_ldo_regulator_ops, &bd71837_ldo_regulator_ops,
1060	&bd71837_ldo_regulator_ops, &bd71837_ldo_regulator_ops,
1061	&bd71837_ldo_regulator_ops,
1062};
1063
1064static const struct regulator_ops *bd71837_hwcontrol_ops[] = {
1065	&BD718XX_HWOPNAME(bd718xx_dvs_buck_regulator_ops),
1066	&BD718XX_HWOPNAME(bd718xx_dvs_buck_regulator_ops),
1067	&bd71837_buck34_ops_hwctrl, &bd71837_buck34_ops_hwctrl,
1068	&BD718XX_HWOPNAME(bd71837_pickable_range_buck_ops),
1069	&BD718XX_HWOPNAME(bd71837_buck_regulator_ops),
1070	&BD718XX_HWOPNAME(bd71837_buck_regulator_nolinear_ops),
1071	&BD718XX_HWOPNAME(bd71837_buck_regulator_ops),
1072	&BD718XX_HWOPNAME(bd71837_pickable_range_ldo_ops),
1073	&BD718XX_HWOPNAME(bd71837_ldo_regulator_nolinear_ops),
1074	&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
1075	&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
1076	&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
1077	&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
1078	&BD718XX_HWOPNAME(bd71837_ldo_regulator_ops),
1079};
1080
1081static struct bd718xx_regulator_data bd71837_regulators[] = {
1082	{
1083		.desc = {
1084			.name = "buck1",
1085			.of_match = of_match_ptr("BUCK1"),
1086			.regulators_node = of_match_ptr("regulators"),
1087			.id = BD718XX_BUCK1,
1088			.type = REGULATOR_VOLTAGE,
1089			.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
1090			.linear_ranges = bd718xx_dvs_buck_volts,
1091			.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
1092			.vsel_reg = BD718XX_REG_BUCK1_VOLT_RUN,
1093			.vsel_mask = DVS_BUCK_RUN_MASK,
1094			.enable_reg = BD718XX_REG_BUCK1_CTRL,
1095			.enable_mask = BD718XX_BUCK_EN,
1096			.enable_time = BD71837_BUCK1_STARTUP_TIME,
1097			.ramp_delay_table = bd718xx_ramp_delay,
1098			.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
1099			.ramp_reg = BD718XX_REG_BUCK1_CTRL,
1100			.ramp_mask = BUCK_RAMPRATE_MASK,
1101			.owner = THIS_MODULE,
1102			.of_parse_cb = buck_set_hw_dvs_levels,
1103		},
1104		.dvs = {
1105			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
1106				     ROHM_DVS_LEVEL_SUSPEND,
1107			.run_reg = BD718XX_REG_BUCK1_VOLT_RUN,
1108			.run_mask = DVS_BUCK_RUN_MASK,
1109			.idle_reg = BD718XX_REG_BUCK1_VOLT_IDLE,
1110			.idle_mask = DVS_BUCK_RUN_MASK,
1111			.suspend_reg = BD718XX_REG_BUCK1_VOLT_SUSP,
1112			.suspend_mask = DVS_BUCK_RUN_MASK,
1113		},
1114		.init = {
1115			.reg = BD718XX_REG_BUCK1_CTRL,
1116			.mask = BD718XX_BUCK_SEL,
1117			.val = BD718XX_BUCK_SEL,
1118		},
1119	},
1120	{
1121		.desc = {
1122			.name = "buck2",
1123			.of_match = of_match_ptr("BUCK2"),
1124			.regulators_node = of_match_ptr("regulators"),
1125			.id = BD718XX_BUCK2,
1126			.type = REGULATOR_VOLTAGE,
1127			.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
1128			.linear_ranges = bd718xx_dvs_buck_volts,
1129			.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
1130			.vsel_reg = BD718XX_REG_BUCK2_VOLT_RUN,
1131			.vsel_mask = DVS_BUCK_RUN_MASK,
1132			.enable_reg = BD718XX_REG_BUCK2_CTRL,
1133			.enable_mask = BD718XX_BUCK_EN,
1134			.enable_time = BD71837_BUCK2_STARTUP_TIME,
1135			.ramp_delay_table = bd718xx_ramp_delay,
1136			.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
1137			.ramp_reg = BD718XX_REG_BUCK2_CTRL,
1138			.ramp_mask = BUCK_RAMPRATE_MASK,
1139			.owner = THIS_MODULE,
1140			.of_parse_cb = buck_set_hw_dvs_levels,
1141		},
1142		.dvs = {
1143			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE,
1144			.run_reg = BD718XX_REG_BUCK2_VOLT_RUN,
1145			.run_mask = DVS_BUCK_RUN_MASK,
1146			.idle_reg = BD718XX_REG_BUCK2_VOLT_IDLE,
1147			.idle_mask = DVS_BUCK_RUN_MASK,
1148		},
1149		.init = {
1150			.reg = BD718XX_REG_BUCK2_CTRL,
1151			.mask = BD718XX_BUCK_SEL,
1152			.val = BD718XX_BUCK_SEL,
1153		},
1154	},
1155	{
1156		.desc = {
1157			.name = "buck3",
1158			.of_match = of_match_ptr("BUCK3"),
1159			.regulators_node = of_match_ptr("regulators"),
1160			.id = BD718XX_BUCK3,
1161			.type = REGULATOR_VOLTAGE,
1162			.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
1163			.linear_ranges = bd718xx_dvs_buck_volts,
1164			.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
1165			.vsel_reg = BD71837_REG_BUCK3_VOLT_RUN,
1166			.vsel_mask = DVS_BUCK_RUN_MASK,
1167			.enable_reg = BD71837_REG_BUCK3_CTRL,
1168			.enable_mask = BD718XX_BUCK_EN,
1169			.enable_time = BD71837_BUCK3_STARTUP_TIME,
1170			.ramp_delay_table = bd718xx_ramp_delay,
1171			.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
1172			.ramp_reg = BD71837_REG_BUCK3_CTRL,
1173			.ramp_mask = BUCK_RAMPRATE_MASK,
1174			.owner = THIS_MODULE,
1175			.of_parse_cb = buck_set_hw_dvs_levels,
1176		},
1177		.dvs = {
1178			.level_map = ROHM_DVS_LEVEL_RUN,
1179			.run_reg = BD71837_REG_BUCK3_VOLT_RUN,
1180			.run_mask = DVS_BUCK_RUN_MASK,
1181		},
1182		.init = {
1183			.reg = BD71837_REG_BUCK3_CTRL,
1184			.mask = BD718XX_BUCK_SEL,
1185			.val = BD718XX_BUCK_SEL,
1186		},
1187	},
1188	{
1189		.desc = {
1190			.name = "buck4",
1191			.of_match = of_match_ptr("BUCK4"),
1192			.regulators_node = of_match_ptr("regulators"),
1193			.id = BD718XX_BUCK4,
1194			.type = REGULATOR_VOLTAGE,
1195			.n_voltages = BD718XX_DVS_BUCK_VOLTAGE_NUM,
1196			.linear_ranges = bd718xx_dvs_buck_volts,
1197			.n_linear_ranges = ARRAY_SIZE(bd718xx_dvs_buck_volts),
1198			.vsel_reg = BD71837_REG_BUCK4_VOLT_RUN,
1199			.vsel_mask = DVS_BUCK_RUN_MASK,
1200			.enable_reg = BD71837_REG_BUCK4_CTRL,
1201			.enable_mask = BD718XX_BUCK_EN,
1202			.enable_time = BD71837_BUCK4_STARTUP_TIME,
1203			.ramp_delay_table = bd718xx_ramp_delay,
1204			.n_ramp_values = ARRAY_SIZE(bd718xx_ramp_delay),
1205			.ramp_reg = BD71837_REG_BUCK4_CTRL,
1206			.ramp_mask = BUCK_RAMPRATE_MASK,
1207			.owner = THIS_MODULE,
1208			.of_parse_cb = buck_set_hw_dvs_levels,
1209		},
1210		.dvs = {
1211			.level_map = ROHM_DVS_LEVEL_RUN,
1212			.run_reg = BD71837_REG_BUCK4_VOLT_RUN,
1213			.run_mask = DVS_BUCK_RUN_MASK,
1214		},
1215		.init = {
1216			.reg = BD71837_REG_BUCK4_CTRL,
1217			.mask = BD718XX_BUCK_SEL,
1218			.val = BD718XX_BUCK_SEL,
1219		},
1220	},
1221	{
1222		.desc = {
1223			.name = "buck5",
1224			.of_match = of_match_ptr("BUCK5"),
1225			.regulators_node = of_match_ptr("regulators"),
1226			.id = BD718XX_BUCK5,
1227			.type = REGULATOR_VOLTAGE,
1228			.n_voltages = BD71837_BUCK5_VOLTAGE_NUM,
1229			.linear_ranges = bd71837_buck5_volts,
1230			.n_linear_ranges =
1231				ARRAY_SIZE(bd71837_buck5_volts),
1232			.vsel_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
1233			.vsel_mask = BD71837_BUCK5_MASK,
1234			.vsel_range_reg = BD718XX_REG_1ST_NODVS_BUCK_VOLT,
1235			.vsel_range_mask = BD71837_BUCK5_RANGE_MASK,
1236			.linear_range_selectors_bitfield = bd71837_buck5_volt_range_sel,
1237			.enable_reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
1238			.enable_mask = BD718XX_BUCK_EN,
1239			.enable_time = BD71837_BUCK5_STARTUP_TIME,
1240			.owner = THIS_MODULE,
1241		},
1242		.init = {
1243			.reg = BD718XX_REG_1ST_NODVS_BUCK_CTRL,
1244			.mask = BD718XX_BUCK_SEL,
1245			.val = BD718XX_BUCK_SEL,
1246		},
1247	},
1248	{
1249		.desc = {
1250			.name = "buck6",
1251			.of_match = of_match_ptr("BUCK6"),
1252			.regulators_node = of_match_ptr("regulators"),
1253			.id = BD718XX_BUCK6,
1254			.type = REGULATOR_VOLTAGE,
1255			.n_voltages = BD71837_BUCK6_VOLTAGE_NUM,
1256			.linear_ranges = bd71837_buck6_volts,
1257			.n_linear_ranges =
1258				ARRAY_SIZE(bd71837_buck6_volts),
1259			.vsel_reg = BD718XX_REG_2ND_NODVS_BUCK_VOLT,
1260			.vsel_mask = BD71837_BUCK6_MASK,
1261			.enable_reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
1262			.enable_mask = BD718XX_BUCK_EN,
1263			.enable_time = BD71837_BUCK6_STARTUP_TIME,
1264			.owner = THIS_MODULE,
1265		},
1266		.init = {
1267			.reg = BD718XX_REG_2ND_NODVS_BUCK_CTRL,
1268			.mask = BD718XX_BUCK_SEL,
1269			.val = BD718XX_BUCK_SEL,
1270		},
1271	},
1272	{
1273		.desc = {
1274			.name = "buck7",
1275			.of_match = of_match_ptr("BUCK7"),
1276			.regulators_node = of_match_ptr("regulators"),
1277			.id = BD718XX_BUCK7,
1278			.type = REGULATOR_VOLTAGE,
1279			.volt_table = &bd718xx_3rd_nodvs_buck_volts[0],
1280			.n_voltages = ARRAY_SIZE(bd718xx_3rd_nodvs_buck_volts),
1281			.vsel_reg = BD718XX_REG_3RD_NODVS_BUCK_VOLT,
1282			.vsel_mask = BD718XX_3RD_NODVS_BUCK_MASK,
1283			.enable_reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
1284			.enable_mask = BD718XX_BUCK_EN,
1285			.enable_time = BD71837_BUCK7_STARTUP_TIME,
1286			.owner = THIS_MODULE,
1287		},
1288		.init = {
1289			.reg = BD718XX_REG_3RD_NODVS_BUCK_CTRL,
1290			.mask = BD718XX_BUCK_SEL,
1291			.val = BD718XX_BUCK_SEL,
1292		},
1293	},
1294	{
1295		.desc = {
1296			.name = "buck8",
1297			.of_match = of_match_ptr("BUCK8"),
1298			.regulators_node = of_match_ptr("regulators"),
1299			.id = BD718XX_BUCK8,
1300			.type = REGULATOR_VOLTAGE,
1301			.n_voltages = BD718XX_4TH_NODVS_BUCK_VOLTAGE_NUM,
1302			.linear_ranges = bd718xx_4th_nodvs_buck_volts,
1303			.n_linear_ranges =
1304				ARRAY_SIZE(bd718xx_4th_nodvs_buck_volts),
1305			.vsel_reg = BD718XX_REG_4TH_NODVS_BUCK_VOLT,
1306			.vsel_mask = BD718XX_4TH_NODVS_BUCK_MASK,
1307			.enable_reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
1308			.enable_mask = BD718XX_BUCK_EN,
1309			.enable_time = BD71837_BUCK8_STARTUP_TIME,
1310			.owner = THIS_MODULE,
1311		},
1312		.init = {
1313			.reg = BD718XX_REG_4TH_NODVS_BUCK_CTRL,
1314			.mask = BD718XX_BUCK_SEL,
1315			.val = BD718XX_BUCK_SEL,
1316		},
1317	},
1318	{
1319		.desc = {
1320			.name = "ldo1",
1321			.of_match = of_match_ptr("LDO1"),
1322			.regulators_node = of_match_ptr("regulators"),
1323			.id = BD718XX_LDO1,
1324			.type = REGULATOR_VOLTAGE,
1325			.n_voltages = BD718XX_LDO1_VOLTAGE_NUM,
1326			.linear_ranges = bd718xx_ldo1_volts,
1327			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo1_volts),
1328			.vsel_reg = BD718XX_REG_LDO1_VOLT,
1329			.vsel_mask = BD718XX_LDO1_MASK,
1330			.vsel_range_reg = BD718XX_REG_LDO1_VOLT,
1331			.vsel_range_mask = BD718XX_LDO1_RANGE_MASK,
1332			.linear_range_selectors_bitfield = bd718xx_ldo1_volt_range_sel,
1333			.enable_reg = BD718XX_REG_LDO1_VOLT,
1334			.enable_mask = BD718XX_LDO_EN,
1335			.enable_time = BD71837_LDO1_STARTUP_TIME,
1336			.owner = THIS_MODULE,
1337		},
1338		.init = {
1339			.reg = BD718XX_REG_LDO1_VOLT,
1340			.mask = BD718XX_LDO_SEL,
1341			.val = BD718XX_LDO_SEL,
1342		},
1343	},
1344	{
1345		.desc = {
1346			.name = "ldo2",
1347			.of_match = of_match_ptr("LDO2"),
1348			.regulators_node = of_match_ptr("regulators"),
1349			.id = BD718XX_LDO2,
1350			.type = REGULATOR_VOLTAGE,
1351			.volt_table = &ldo_2_volts[0],
1352			.vsel_reg = BD718XX_REG_LDO2_VOLT,
1353			.vsel_mask = BD718XX_LDO2_MASK,
1354			.n_voltages = ARRAY_SIZE(ldo_2_volts),
1355			.enable_reg = BD718XX_REG_LDO2_VOLT,
1356			.enable_mask = BD718XX_LDO_EN,
1357			.enable_time = BD71837_LDO2_STARTUP_TIME,
1358			.owner = THIS_MODULE,
1359		},
1360		.init = {
1361			.reg = BD718XX_REG_LDO2_VOLT,
1362			.mask = BD718XX_LDO_SEL,
1363			.val = BD718XX_LDO_SEL,
1364		},
1365	},
1366	{
1367		.desc = {
1368			.name = "ldo3",
1369			.of_match = of_match_ptr("LDO3"),
1370			.regulators_node = of_match_ptr("regulators"),
1371			.id = BD718XX_LDO3,
1372			.type = REGULATOR_VOLTAGE,
1373			.n_voltages = BD718XX_LDO3_VOLTAGE_NUM,
1374			.linear_ranges = bd718xx_ldo3_volts,
1375			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo3_volts),
1376			.vsel_reg = BD718XX_REG_LDO3_VOLT,
1377			.vsel_mask = BD718XX_LDO3_MASK,
1378			.enable_reg = BD718XX_REG_LDO3_VOLT,
1379			.enable_mask = BD718XX_LDO_EN,
1380			.enable_time = BD71837_LDO3_STARTUP_TIME,
1381			.owner = THIS_MODULE,
1382		},
1383		.init = {
1384			.reg = BD718XX_REG_LDO3_VOLT,
1385			.mask = BD718XX_LDO_SEL,
1386			.val = BD718XX_LDO_SEL,
1387		},
1388	},
1389	{
1390		.desc = {
1391			.name = "ldo4",
1392			.of_match = of_match_ptr("LDO4"),
1393			.regulators_node = of_match_ptr("regulators"),
1394			.id = BD718XX_LDO4,
1395			.type = REGULATOR_VOLTAGE,
1396			.n_voltages = BD718XX_LDO4_VOLTAGE_NUM,
1397			.linear_ranges = bd718xx_ldo4_volts,
1398			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo4_volts),
1399			.vsel_reg = BD718XX_REG_LDO4_VOLT,
1400			.vsel_mask = BD718XX_LDO4_MASK,
1401			.enable_reg = BD718XX_REG_LDO4_VOLT,
1402			.enable_mask = BD718XX_LDO_EN,
1403			.enable_time = BD71837_LDO4_STARTUP_TIME,
1404			.owner = THIS_MODULE,
1405		},
1406		.init = {
1407			.reg = BD718XX_REG_LDO4_VOLT,
1408			.mask = BD718XX_LDO_SEL,
1409			.val = BD718XX_LDO_SEL,
1410		},
1411	},
1412	{
1413		.desc = {
1414			.name = "ldo5",
1415			.of_match = of_match_ptr("LDO5"),
1416			.regulators_node = of_match_ptr("regulators"),
1417			.id = BD718XX_LDO5,
1418			.type = REGULATOR_VOLTAGE,
1419			.n_voltages = BD71837_LDO5_VOLTAGE_NUM,
1420			.linear_ranges = bd71837_ldo5_volts,
1421			.n_linear_ranges = ARRAY_SIZE(bd71837_ldo5_volts),
1422			/* LDO5 is supplied by buck6 */
1423			.supply_name = "buck6",
1424			.vsel_reg = BD718XX_REG_LDO5_VOLT,
1425			.vsel_mask = BD71837_LDO5_MASK,
1426			.enable_reg = BD718XX_REG_LDO5_VOLT,
1427			.enable_mask = BD718XX_LDO_EN,
1428			.enable_time = BD71837_LDO5_STARTUP_TIME,
1429			.owner = THIS_MODULE,
1430		},
1431		.init = {
1432			.reg = BD718XX_REG_LDO5_VOLT,
1433			.mask = BD718XX_LDO_SEL,
1434			.val = BD718XX_LDO_SEL,
1435		},
1436		.additional_inits = bd71837_ldo5_inits,
1437		.additional_init_amnt = ARRAY_SIZE(bd71837_ldo5_inits),
1438	},
1439	{
1440		.desc = {
1441			.name = "ldo6",
1442			.of_match = of_match_ptr("LDO6"),
1443			.regulators_node = of_match_ptr("regulators"),
1444			.id = BD718XX_LDO6,
1445			.type = REGULATOR_VOLTAGE,
1446			.n_voltages = BD718XX_LDO6_VOLTAGE_NUM,
1447			.linear_ranges = bd718xx_ldo6_volts,
1448			.n_linear_ranges = ARRAY_SIZE(bd718xx_ldo6_volts),
1449			/* LDO6 is supplied by buck7 */
1450			.supply_name = "buck7",
1451			.vsel_reg = BD718XX_REG_LDO6_VOLT,
1452			.vsel_mask = BD718XX_LDO6_MASK,
1453			.enable_reg = BD718XX_REG_LDO6_VOLT,
1454			.enable_mask = BD718XX_LDO_EN,
1455			.enable_time = BD71837_LDO6_STARTUP_TIME,
1456			.owner = THIS_MODULE,
1457		},
1458		.init = {
1459			.reg = BD718XX_REG_LDO6_VOLT,
1460			.mask = BD718XX_LDO_SEL,
1461			.val = BD718XX_LDO_SEL,
1462		},
1463		.additional_inits = bd71837_ldo6_inits,
1464		.additional_init_amnt = ARRAY_SIZE(bd71837_ldo6_inits),
1465	},
1466	{
1467		.desc = {
1468			.name = "ldo7",
1469			.of_match = of_match_ptr("LDO7"),
1470			.regulators_node = of_match_ptr("regulators"),
1471			.id = BD718XX_LDO7,
1472			.type = REGULATOR_VOLTAGE,
1473			.n_voltages = BD71837_LDO7_VOLTAGE_NUM,
1474			.linear_ranges = bd71837_ldo7_volts,
1475			.n_linear_ranges = ARRAY_SIZE(bd71837_ldo7_volts),
1476			.vsel_reg = BD71837_REG_LDO7_VOLT,
1477			.vsel_mask = BD71837_LDO7_MASK,
1478			.enable_reg = BD71837_REG_LDO7_VOLT,
1479			.enable_mask = BD718XX_LDO_EN,
1480			.enable_time = BD71837_LDO7_STARTUP_TIME,
1481			.owner = THIS_MODULE,
1482		},
1483		.init = {
1484			.reg = BD71837_REG_LDO7_VOLT,
1485			.mask = BD718XX_LDO_SEL,
1486			.val = BD718XX_LDO_SEL,
1487		},
1488	},
1489};
1490
1491static void mark_hw_controlled(struct device *dev, struct device_node *np,
1492			       struct bd718xx_regulator_data *reg_data,
1493			       unsigned int num_reg_data, int *info)
1494{
1495	int i;
1496
1497	for (i = 1; i <= num_reg_data; i++) {
1498		if (!of_node_name_eq(np, reg_data[i-1].desc.of_match))
1499			continue;
1500
1501		*info |= 1 << (i - 1);
1502		dev_dbg(dev, "regulator %d runlevel controlled\n", i);
1503		return;
1504	}
1505	dev_warn(dev, "Bad regulator node\n");
1506}
1507
1508/*
1509 * Setups where regulator (especially the buck8) output voltage is scaled
1510 * by adding external connection where some other regulator output is connected
1511 * to feedback-pin (over suitable resistors) is getting popular amongst users
1512 * of BD71837. (This allows for example scaling down the buck8 voltages to suit
1513 * lover GPU voltages for projects where buck8 is (ab)used to supply power
1514 * for GPU. Additionally some setups do allow DVS for buck8 but as this do
1515 * produce voltage spikes the HW must be evaluated to be able to survive this
1516 * - hence I keep the DVS disabled for non DVS bucks by default. I don't want
1517 * to help you burn your proto board)
1518 *
1519 * So we allow describing this external connection from DT and scale the
1520 * voltages accordingly. This is what the connection should look like:
1521 *
1522 * |------------|
1523 * |	buck 8  |-------+----->Vout
1524 * |		|	|
1525 * |------------|	|
1526 *	| FB pin	|
1527 *	|		|
1528 *	+-------+--R2---+
1529 *		|
1530 *		R1
1531 *		|
1532 *	V FB-pull-up
1533 *
1534 *	Here the buck output is sifted according to formula:
1535 *
1536 * Vout_o = Vo - (Vpu - Vo)*R2/R1
1537 * Linear_step = step_orig*(R1+R2)/R1
1538 *
1539 * where:
1540 * Vout_o is adjusted voltage output at vsel reg value 0
1541 * Vo is original voltage output at vsel reg value 0
1542 * Vpu is the pull-up voltage V FB-pull-up in the picture
1543 * R1 and R2 are resistor values.
1544 *
1545 * As a real world example for buck8 and a specific GPU:
1546 * VLDO = 1.6V (used as FB-pull-up)
1547 * R1 = 1000ohms
1548 * R2 = 150ohms
1549 * VSEL 0x0 => 0.8V – (VLDO – 0.8) * R2 / R1 = 0.68V
1550 * Linear Step = 10mV * (R1 + R2) / R1 = 11.5mV
1551 */
1552static int setup_feedback_loop(struct device *dev, struct device_node *np,
1553			       struct bd718xx_regulator_data *reg_data,
1554			       unsigned int num_reg_data, int fb_uv)
1555{
1556	int i, r1, r2, ret;
1557
1558	/*
1559	 * We do adjust the values in the global desc based on DT settings.
1560	 * This may not be best approach as it can cause problems if more than
1561	 * one PMIC is controlled from same processor. I don't see such use-case
1562	 * for BD718x7 now - so we spare some bits.
1563	 *
1564	 * If this will point out to be a problem - then we can allocate new
1565	 * bd718xx_regulator_data array at probe and just use the global
1566	 * array as a template where we copy initial values. Then we can
1567	 * use allocated descs for regultor registration and do IC specific
1568	 * modifications to this copy while leaving other PMICs untouched. But
1569	 * that means allocating new array for each PMIC - and currently I see
1570	 * no need for that.
1571	 */
1572
1573	for (i = 0; i < num_reg_data; i++) {
1574		struct regulator_desc *desc = &reg_data[i].desc;
1575		int j;
1576
1577		if (!of_node_name_eq(np, desc->of_match))
1578			continue;
1579
1580		/* The feedback loop connection does not make sense for LDOs */
1581		if (desc->id >= BD718XX_LDO1)
1582			return -EINVAL;
1583
1584		ret = of_property_read_u32(np, "rohm,feedback-pull-up-r1-ohms",
1585					   &r1);
1586		if (ret)
1587			return ret;
1588
1589		if (!r1)
1590			return -EINVAL;
1591
1592		ret = of_property_read_u32(np, "rohm,feedback-pull-up-r2-ohms",
1593					   &r2);
1594		if (ret)
1595			return ret;
1596
1597		if (desc->n_linear_ranges && desc->linear_ranges) {
1598			struct linear_range *new;
1599
1600			new = devm_kzalloc(dev, desc->n_linear_ranges *
1601					   sizeof(struct linear_range),
1602					   GFP_KERNEL);
1603			if (!new)
1604				return -ENOMEM;
1605
1606			for (j = 0; j < desc->n_linear_ranges; j++) {
1607				int min = desc->linear_ranges[j].min;
1608				int step = desc->linear_ranges[j].step;
1609
1610				min -= (fb_uv - min)*r2/r1;
1611				step = step * (r1 + r2);
1612				step /= r1;
1613
1614				new[j].min = min;
1615				new[j].step = step;
1616
1617				dev_dbg(dev, "%s: old range min %d, step %d\n",
1618					desc->name, desc->linear_ranges[j].min,
1619					desc->linear_ranges[j].step);
1620				dev_dbg(dev, "new range min %d, step %d\n", min,
1621					step);
1622			}
1623			desc->linear_ranges = new;
1624		}
1625		dev_dbg(dev, "regulator '%s' has FB pull-up configured\n",
1626			desc->name);
1627
1628		return 0;
1629	}
1630
1631	return -ENODEV;
1632}
1633
1634static int get_special_regulators(struct device *dev,
1635				  struct bd718xx_regulator_data *reg_data,
1636				  unsigned int num_reg_data, int *info)
1637{
1638	int ret;
 
 
1639	int uv;
1640
1641	*info = 0;
1642
1643	struct device_node *nproot __free(device_node) = of_get_child_by_name(dev->of_node,
1644									      "regulators");
1645	if (!nproot) {
1646		dev_err(dev, "failed to find regulators node\n");
1647		return -ENODEV;
1648	}
1649	for_each_child_of_node_scoped(nproot, np) {
1650		if (of_property_read_bool(np, "rohm,no-regulator-enable-control"))
1651			mark_hw_controlled(dev, np, reg_data, num_reg_data,
1652					   info);
1653		ret = of_property_read_u32(np, "rohm,fb-pull-up-microvolt",
1654					   &uv);
1655		if (ret) {
1656			if (ret == -EINVAL)
1657				continue;
1658			else
1659				return ret;
1660		}
1661
1662		ret = setup_feedback_loop(dev, np, reg_data, num_reg_data, uv);
1663		if (ret)
1664			return ret;
1665	}
1666
 
1667	return 0;
 
 
 
 
 
 
1668}
1669
1670static int bd718xx_probe(struct platform_device *pdev)
1671{
1672	struct regmap *regmap;
1673	struct regulator_config config = { 0 };
1674	int i, j, err, omit_enable;
1675	bool use_snvs;
1676	struct bd718xx_regulator_data *reg_data;
1677	unsigned int num_reg_data;
1678	enum rohm_chip_type chip = platform_get_device_id(pdev)->driver_data;
1679	const struct regulator_ops **swops, **hwops;
1680
1681	regmap = dev_get_regmap(pdev->dev.parent, NULL);
1682	if (!regmap) {
1683		dev_err(&pdev->dev, "No MFD driver data\n");
1684		return -EINVAL;
1685	}
1686
1687	switch (chip) {
1688	case ROHM_CHIP_TYPE_BD71837:
1689		reg_data = bd71837_regulators;
1690		num_reg_data = ARRAY_SIZE(bd71837_regulators);
1691		swops = &bd71837_swcontrol_ops[0];
1692		hwops = &bd71837_hwcontrol_ops[0];
1693		break;
1694	case ROHM_CHIP_TYPE_BD71847:
1695		reg_data = bd71847_regulators;
1696		num_reg_data = ARRAY_SIZE(bd71847_regulators);
1697		swops = &bd71847_swcontrol_ops[0];
1698		hwops = &bd71847_hwcontrol_ops[0];
1699		break;
1700	default:
1701		dev_err(&pdev->dev, "Unsupported chip type\n");
1702		return -EINVAL;
1703	}
1704
1705	/* Register LOCK release */
1706	err = regmap_update_bits(regmap, BD718XX_REG_REGLOCK,
1707				 (REGLOCK_PWRSEQ | REGLOCK_VREG), 0);
1708	if (err)
1709		return dev_err_probe(&pdev->dev, err, "Failed to unlock PMIC\n");
1710
1711	dev_dbg(&pdev->dev, "Unlocked lock register 0x%x\n",
1712		BD718XX_REG_REGLOCK);
1713
1714	use_snvs = of_property_read_bool(pdev->dev.parent->of_node,
1715					 "rohm,reset-snvs-powered");
1716
1717	/*
1718	 * Change the next stage from poweroff to be READY instead of SNVS
1719	 * for all reset types because OTP loading at READY will clear SEL
1720	 * bit allowing HW defaults for power rails to be used
1721	 */
1722	if (!use_snvs) {
1723		err = regmap_update_bits(regmap, BD718XX_REG_TRANS_COND1,
1724					 BD718XX_ON_REQ_POWEROFF_MASK |
1725					 BD718XX_SWRESET_POWEROFF_MASK |
1726					 BD718XX_WDOG_POWEROFF_MASK |
1727					 BD718XX_KEY_L_POWEROFF_MASK,
1728					 BD718XX_POWOFF_TO_RDY);
1729		if (err)
1730			return dev_err_probe(&pdev->dev, err,
1731					     "Failed to change reset target\n");
1732
1733		dev_dbg(&pdev->dev, "Changed all resets from SVNS to READY\n");
1734	}
1735
1736	config.dev = pdev->dev.parent;
1737	config.regmap = regmap;
1738	/*
1739	 * There are cases when we want to leave the enable-control for
1740	 * the HW state machine and use this driver only for voltage control.
1741	 * One special case is when we use PMIC_STBY_REQ line from SoC to PMIC
1742	 * in order to set the system to SUSPEND state.
1743	 *
1744	 * If regulator is taken under SW control the regulator state will not
1745	 * be affected by PMIC state machine - Eg. regulator is likely to stay
1746	 * on even in SUSPEND
1747	 */
1748	err = get_special_regulators(pdev->dev.parent, reg_data, num_reg_data,
1749				     &omit_enable);
1750	if (err)
1751		return err;
1752
1753	for (i = 0; i < num_reg_data; i++) {
1754
1755		struct regulator_desc *desc;
1756		struct regulator_dev *rdev;
1757		struct bd718xx_regulator_data *r;
1758		int no_enable_control = omit_enable & (1 << i);
1759
1760		r = &reg_data[i];
1761		desc = &r->desc;
1762
1763		if (no_enable_control)
1764			desc->ops = hwops[i];
1765		else
1766			desc->ops = swops[i];
1767
1768		rdev = devm_regulator_register(&pdev->dev, desc, &config);
1769		if (IS_ERR(rdev))
1770			return dev_err_probe(&pdev->dev, PTR_ERR(rdev),
1771					     "failed to register %s regulator\n",
1772					     desc->name);
1773
1774		/*
1775		 * Regulator register gets the regulator constraints and
1776		 * applies them (set_machine_constraints). This should have
1777		 * turned the control register(s) to correct values and we
1778		 * can now switch the control from PMIC state machine to the
1779		 * register interface
1780		 *
1781		 * At poweroff transition PMIC HW disables EN bit for
1782		 * regulators but leaves SEL bit untouched. So if state
1783		 * transition from POWEROFF is done to SNVS - then all power
1784		 * rails controlled by SW (having SEL bit set) stay disabled
1785		 * as EN is cleared. This will result boot failure if any
1786		 * crucial systems are powered by these rails. We don't
1787		 * enable SW control for crucial regulators if snvs state is
1788		 * used
1789		 */
1790		if (!no_enable_control && (!use_snvs ||
1791		    !rdev->constraints->always_on ||
1792		    !rdev->constraints->boot_on)) {
1793			err = regmap_update_bits(regmap, r->init.reg,
1794						 r->init.mask, r->init.val);
1795			if (err)
1796				return dev_err_probe(&pdev->dev, err,
1797					"Failed to take control for (%s)\n",
1798					desc->name);
1799		}
1800		for (j = 0; j < r->additional_init_amnt; j++) {
1801			err = regmap_update_bits(regmap,
1802						 r->additional_inits[j].reg,
1803						 r->additional_inits[j].mask,
1804						 r->additional_inits[j].val);
1805			if (err)
1806				return dev_err_probe(&pdev->dev, err,
1807					"Buck (%s) initialization failed\n",
1808					desc->name);
1809		}
1810	}
1811
1812	return err;
1813}
1814
1815static const struct platform_device_id bd718x7_pmic_id[] = {
1816	{ "bd71837-pmic", ROHM_CHIP_TYPE_BD71837 },
1817	{ "bd71847-pmic", ROHM_CHIP_TYPE_BD71847 },
1818	{ },
1819};
1820MODULE_DEVICE_TABLE(platform, bd718x7_pmic_id);
1821
1822static struct platform_driver bd718xx_regulator = {
1823	.driver = {
1824		.name = "bd718xx-pmic",
1825		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
1826	},
1827	.probe = bd718xx_probe,
1828	.id_table = bd718x7_pmic_id,
1829};
1830
1831module_platform_driver(bd718xx_regulator);
1832
1833MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
1834MODULE_DESCRIPTION("BD71837/BD71847 voltage regulator driver");
1835MODULE_LICENSE("GPL");
1836MODULE_ALIAS("platform:bd718xx-pmic");