1// SPDX-License-Identifier: GPL-2.0-only
   2//
   3// DA9121 Single-channel dual-phase 10A buck converter
   4//
   5// Copyright (C) 2020 Axis Communications AB
   6//
   7// DA9130 Single-channel dual-phase 10A buck converter (Automotive)
   8// DA9217 Single-channel dual-phase  6A buck converter
   9// DA9122 Dual-channel single-phase  5A buck converter
  10// DA9131 Dual-channel single-phase  5A buck converter (Automotive)
  11// DA9220 Dual-channel single-phase  3A buck converter
  12// DA9132 Dual-channel single-phase  3A buck converter (Automotive)
  13//
  14// Copyright (C) 2020 Dialog Semiconductor
  15
  16#include <linux/of.h>
  17#include <linux/gpio/consumer.h>
  18#include <linux/regulator/of_regulator.h>
  19#include <linux/regulator/machine.h>
  20#include <linux/regulator/driver.h>
  21#include <linux/module.h>
  22#include <linux/regmap.h>
  23#include <linux/err.h>
  24#include <linux/i2c.h>
  25#include <linux/regulator/da9121.h>
  26#include <linux/interrupt.h>
  27#include <linux/workqueue.h>
  28
  29#include "da9121-regulator.h"
  30
  31/* Chip data */
  32struct da9121 {
  33	struct device *dev;
  34	struct delayed_work work;
  35	struct da9121_pdata *pdata;
  36	struct regmap *regmap;
  37	struct regulator_dev *rdev[DA9121_IDX_MAX];
  38	unsigned int persistent[2];
  39	unsigned int passive_delay;
  40	int chip_irq;
  41	int variant_id;
  42	int subvariant_id;
  43};
  44
  45/* Define ranges for different variants, enabling translation to/from
  46 * registers. Maximums give scope to allow for transients.
  47 */
  48struct da9121_range {
  49	int val_min;
  50	int val_max;
  51	int val_stp;
  52	int reg_min;
  53	int reg_max;
  54};
  55
  56static const struct da9121_range da9121_10A_2phase_current = {
  57	.val_min =  7000000,
  58	.val_max = 20000000,
  59	.val_stp =  1000000,
  60	.reg_min = 1,
  61	.reg_max = 14,
  62};
  63
  64static const struct da9121_range da9121_6A_2phase_current = {
  65	.val_min =  7000000,
  66	.val_max = 12000000,
  67	.val_stp =  1000000,
  68	.reg_min = 1,
  69	.reg_max = 6,
  70};
  71
  72static const struct da9121_range da9121_5A_1phase_current = {
  73	.val_min =  3500000,
  74	.val_max = 10000000,
  75	.val_stp =   500000,
  76	.reg_min = 1,
  77	.reg_max = 14,
  78};
  79
  80static const struct da9121_range da9121_3A_1phase_current = {
  81	.val_min = 3500000,
  82	.val_max = 6000000,
  83	.val_stp =  500000,
  84	.reg_min = 1,
  85	.reg_max = 6,
  86};
  87
  88static const struct da9121_range da914x_40A_4phase_current = {
  89	.val_min = 26000000,
  90	.val_max = 78000000,
  91	.val_stp =  4000000,
  92	.reg_min = 1,
  93	.reg_max = 14,
  94};
  95
  96static const struct da9121_range da914x_20A_2phase_current = {
  97	.val_min = 13000000,
  98	.val_max = 39000000,
  99	.val_stp =  2000000,
 100	.reg_min = 1,
 101	.reg_max = 14,
 102};
 103
 104struct da9121_variant_info {
 105	int num_bucks;
 106	int num_phases;
 107	const struct da9121_range *current_range;
 108};
 109
 110static const struct da9121_variant_info variant_parameters[] = {
 111	{ 1, 2, &da9121_10A_2phase_current },	//DA9121_TYPE_DA9121_DA9130
 112	{ 2, 1, &da9121_3A_1phase_current  },	//DA9121_TYPE_DA9220_DA9132
 113	{ 2, 1, &da9121_5A_1phase_current  },	//DA9121_TYPE_DA9122_DA9131
 114	{ 1, 2, &da9121_6A_2phase_current  },	//DA9121_TYPE_DA9217
 115	{ 1, 4, &da914x_40A_4phase_current },   //DA9121_TYPE_DA9141
 116	{ 1, 2, &da914x_20A_2phase_current },   //DA9121_TYPE_DA9142
 117};
 118
 119struct da9121_field {
 120	unsigned int reg;
 121	unsigned int msk;
 122};
 123
 124static const struct da9121_field da9121_current_field[2] = {
 125	{ DA9121_REG_BUCK_BUCK1_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
 126	{ DA9xxx_REG_BUCK_BUCK2_2, DA9121_MASK_BUCK_BUCKx_2_CHx_ILIM },
 127};
 128
 129static const struct da9121_field da9121_mode_field[2] = {
 130	{ DA9121_REG_BUCK_BUCK1_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
 131	{ DA9xxx_REG_BUCK_BUCK2_4, DA9121_MASK_BUCK_BUCKx_4_CHx_A_MODE },
 132};
 133
 134struct status_event_data {
 135	int buck_id; /* 0=core, 1/2-buck */
 136	int reg_index;  /* index for status/event/mask register selection */
 137	int status_bit; /* bit masks... */
 138	int event_bit;
 139	int mask_bit;
 140	unsigned long notification; /* Notification for status inception */
 141	char *warn; /* if NULL, notify - otherwise dev_warn this string */
 142};
 143
 144#define DA9121_STATUS(id, bank, name, notification, warning) \
 145	{ id, bank, \
 146	DA9121_MASK_SYS_STATUS_##bank##_##name, \
 147	DA9121_MASK_SYS_EVENT_##bank##_E_##name, \
 148	DA9121_MASK_SYS_MASK_##bank##_M_##name, \
 149	notification, warning }
 150
 151/* For second buck related event bits that are specific to DA9122, DA9220 variants */
 152#define DA9xxx_STATUS(id, bank, name, notification, warning) \
 153	{ id, bank, \
 154	DA9xxx_MASK_SYS_STATUS_##bank##_##name, \
 155	DA9xxx_MASK_SYS_EVENT_##bank##_E_##name, \
 156	DA9xxx_MASK_SYS_MASK_##bank##_M_##name, \
 157	notification, warning }
 158
 159/* The status signals that may need servicing, depending on device variant.
 160 * After assertion, they persist; so event is notified, the IRQ disabled,
 161 * and status polled until clear again and IRQ is reenabled.
 162 *
 163 * SG/PG1/PG2 should be set when device first powers up and should never
 164 * re-occur. When this driver starts, it is expected that these will have
 165 * self-cleared for when the IRQs are enabled, so these should never be seen.
 166 * If seen, the implication is that the device has reset.
 167 *
 168 * GPIO0/1/2 are not configured for use by default, so should not be seen.
 169 */
 170static const struct status_event_data status_event_handling[] = {
 171	DA9xxx_STATUS(0, 0, SG, 0, "Handled E_SG\n"),
 172	DA9121_STATUS(0, 0, TEMP_CRIT, (REGULATOR_EVENT_OVER_TEMP|REGULATOR_EVENT_DISABLE), NULL),
 173	DA9121_STATUS(0, 0, TEMP_WARN, REGULATOR_EVENT_OVER_TEMP, NULL),
 174	DA9121_STATUS(1, 1, PG1, 0, "Handled E_PG1\n"),
 175	DA9121_STATUS(1, 1, OV1, REGULATOR_EVENT_REGULATION_OUT, NULL),
 176	DA9121_STATUS(1, 1, UV1, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
 177	DA9121_STATUS(1, 1, OC1, REGULATOR_EVENT_OVER_CURRENT, NULL),
 178	DA9xxx_STATUS(2, 1, PG2, 0, "Handled E_PG2\n"),
 179	DA9xxx_STATUS(2, 1, OV2, REGULATOR_EVENT_REGULATION_OUT, NULL),
 180	DA9xxx_STATUS(2, 1, UV2, REGULATOR_EVENT_UNDER_VOLTAGE, NULL),
 181	DA9xxx_STATUS(2, 1, OC2, REGULATOR_EVENT_OVER_CURRENT, NULL),
 182	DA9121_STATUS(0, 2, GPIO0, 0, "Handled E_GPIO0\n"),
 183	DA9121_STATUS(0, 2, GPIO1, 0, "Handled E_GPIO1\n"),
 184	DA9121_STATUS(0, 2, GPIO2, 0, "Handled E_GPIO2\n"),
 185};
 186
 187static int da9121_get_current_limit(struct regulator_dev *rdev)
 188{
 189	struct da9121 *chip = rdev_get_drvdata(rdev);
 190	int id = rdev_get_id(rdev);
 191	const struct da9121_range *range =
 192		variant_parameters[chip->variant_id].current_range;
 193	unsigned int val = 0;
 194	int ret = 0;
 195
 196	ret = regmap_read(chip->regmap, da9121_current_field[id].reg, &val);
 197	if (ret < 0) {
 198		dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
 199		goto error;
 200	}
 201
 202	if (val < range->reg_min) {
 203		ret = -EACCES;
 204		goto error;
 205	}
 206
 207	if (val > range->reg_max) {
 208		ret = -EINVAL;
 209		goto error;
 210	}
 211
 212	return range->val_min + (range->val_stp * (val - range->reg_min));
 213error:
 214	return ret;
 215}
 216
 217static int da9121_ceiling_selector(struct regulator_dev *rdev,
 218		int min, int max,
 219		unsigned int *selector)
 220{
 221	struct da9121 *chip = rdev_get_drvdata(rdev);
 222	const struct da9121_range *range =
 223		variant_parameters[chip->variant_id].current_range;
 224	unsigned int level;
 225	unsigned int i = 0;
 226	unsigned int sel = 0;
 227	int ret = 0;
 228
 229	if (range->val_min > max || range->val_max < min) {
 230		dev_err(chip->dev,
 231			"Requested current out of regulator capability\n");
 232		ret = -EINVAL;
 233		goto error;
 234	}
 235
 236	level = range->val_max;
 237	for (i = range->reg_max; i >= range->reg_min; i--) {
 238		if (level <= max) {
 239			sel = i;
 240			break;
 241		}
 242		level -= range->val_stp;
 243	}
 244
 245	if (level < min) {
 246		dev_err(chip->dev,
 247			"Best match falls below minimum requested current\n");
 248		ret = -EINVAL;
 249		goto error;
 250	}
 251
 252	*selector = sel;
 253error:
 254	return ret;
 255}
 256
 257static int da9121_set_current_limit(struct regulator_dev *rdev,
 258				int min_ua, int max_ua)
 259{
 260	struct da9121 *chip = rdev_get_drvdata(rdev);
 261	int id = rdev_get_id(rdev);
 262	const struct da9121_range *range =
 263		variant_parameters[chip->variant_id].current_range;
 264	unsigned int sel = 0;
 265	int ret = 0;
 266
 267	if (min_ua < range->val_min ||
 268	    max_ua > range->val_max) {
 269		ret = -EINVAL;
 270		goto error;
 271	}
 272
 273	if (rdev->desc->ops->is_enabled(rdev)) {
 274		ret = -EBUSY;
 275		goto error;
 276	}
 277
 278	ret = da9121_ceiling_selector(rdev, min_ua, max_ua, &sel);
 279	if (ret < 0)
 280		goto error;
 281
 282	ret = regmap_update_bits(chip->regmap,
 283				da9121_current_field[id].reg,
 284				da9121_current_field[id].msk,
 285				(unsigned int)sel);
 286	if (ret < 0)
 287		dev_err(chip->dev, "Cannot update BUCK current limit, err: %d\n", ret);
 288
 289error:
 290	return ret;
 291}
 292
 293static unsigned int da9121_map_mode(unsigned int mode)
 294{
 295	switch (mode) {
 296	case DA9121_BUCK_MODE_FORCE_PWM:
 297		return REGULATOR_MODE_FAST;
 298	case DA9121_BUCK_MODE_FORCE_PWM_SHEDDING:
 299		return REGULATOR_MODE_NORMAL;
 300	case DA9121_BUCK_MODE_AUTO:
 301		return REGULATOR_MODE_IDLE;
 302	case DA9121_BUCK_MODE_FORCE_PFM:
 303		return REGULATOR_MODE_STANDBY;
 304	default:
 305		return REGULATOR_MODE_INVALID;
 306	}
 307}
 308
 309static int da9121_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)
 310{
 311	struct da9121 *chip = rdev_get_drvdata(rdev);
 312	int id = rdev_get_id(rdev);
 313	unsigned int val;
 314
 315	switch (mode) {
 316	case REGULATOR_MODE_FAST:
 317		val = DA9121_BUCK_MODE_FORCE_PWM;
 318		break;
 319	case REGULATOR_MODE_NORMAL:
 320		val = DA9121_BUCK_MODE_FORCE_PWM_SHEDDING;
 321		break;
 322	case REGULATOR_MODE_IDLE:
 323		val = DA9121_BUCK_MODE_AUTO;
 324		break;
 325	case REGULATOR_MODE_STANDBY:
 326		val = DA9121_BUCK_MODE_FORCE_PFM;
 327		break;
 328	default:
 329		return -EINVAL;
 330	}
 331
 332	return regmap_update_bits(chip->regmap,
 333				  da9121_mode_field[id].reg,
 334				  da9121_mode_field[id].msk,
 335				  val);
 336}
 337
 338static unsigned int da9121_buck_get_mode(struct regulator_dev *rdev)
 339{
 340	struct da9121 *chip = rdev_get_drvdata(rdev);
 341	int id = rdev_get_id(rdev);
 342	unsigned int val, mode;
 343	int ret = 0;
 344
 345	ret = regmap_read(chip->regmap, da9121_mode_field[id].reg, &val);
 346	if (ret < 0) {
 347		dev_err(chip->dev, "Cannot read BUCK register: %d\n", ret);
 348		return -EINVAL;
 349	}
 350
 351	mode = da9121_map_mode(val & da9121_mode_field[id].msk);
 352	if (mode == REGULATOR_MODE_INVALID)
 353		return -EINVAL;
 354
 355	return mode;
 356}
 357
 358static const struct regulator_ops da9121_buck_ops = {
 359	.enable = regulator_enable_regmap,
 360	.disable = regulator_disable_regmap,
 361	.is_enabled = regulator_is_enabled_regmap,
 362	.set_voltage_sel = regulator_set_voltage_sel_regmap,
 363	.get_voltage_sel = regulator_get_voltage_sel_regmap,
 364	.list_voltage = regulator_list_voltage_linear,
 365	.get_current_limit = da9121_get_current_limit,
 366	.set_current_limit = da9121_set_current_limit,
 367	.set_mode = da9121_buck_set_mode,
 368	.get_mode = da9121_buck_get_mode,
 369};
 370
 371static struct of_regulator_match da9121_matches[] = {
 372	[DA9121_IDX_BUCK1] = { .name = "buck1" },
 373	[DA9121_IDX_BUCK2] = { .name = "buck2" },
 374};
 375
 376static int da9121_of_parse_cb(struct device_node *np,
 377				const struct regulator_desc *desc,
 378				struct regulator_config *config)
 379{
 380	struct da9121 *chip = config->driver_data;
 381	struct da9121_pdata *pdata;
 382	struct gpio_desc *ena_gpiod;
 383
 384	if (chip->pdata == NULL) {
 385		pdata = devm_kzalloc(chip->dev, sizeof(*pdata), GFP_KERNEL);
 386		if (!pdata)
 387			return -ENOMEM;
 388	} else {
 389		pdata = chip->pdata;
 390	}
 391
 392	pdata->num_buck++;
 393
 394	if (pdata->num_buck > variant_parameters[chip->variant_id].num_bucks) {
 395		dev_err(chip->dev, "Error: excessive regulators for device\n");
 396		return -ENODEV;
 397	}
 398
 399	ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0,
 400						GPIOD_OUT_HIGH |
 401						GPIOD_FLAGS_BIT_NONEXCLUSIVE,
 402						"da9121-enable");
 403	if (!IS_ERR(ena_gpiod))
 404		config->ena_gpiod = ena_gpiod;
 405
 406	if (variant_parameters[chip->variant_id].num_bucks == 2) {
 407		uint32_t ripple_cancel;
 408		uint32_t ripple_reg;
 409		int ret;
 410
 411		if (of_property_read_u32(da9121_matches[pdata->num_buck-1].of_node,
 412				"dlg,ripple-cancel", &ripple_cancel)) {
 413			if (pdata->num_buck > 1)
 414				ripple_reg = DA9xxx_REG_BUCK_BUCK2_7;
 415			else
 416				ripple_reg = DA9121_REG_BUCK_BUCK1_7;
 417
 418			ret = regmap_update_bits(chip->regmap, ripple_reg,
 419				DA9xxx_MASK_BUCK_BUCKx_7_CHx_RIPPLE_CANCEL,
 420				ripple_cancel);
 421			if (ret < 0)
 422				dev_err(chip->dev, "Cannot set ripple mode, err: %d\n", ret);
 423		}
 424	}
 425
 426	return 0;
 427}
 428
 429#define DA9121_MIN_MV		300
 430#define DA9121_MAX_MV		1900
 431#define DA9121_STEP_MV		10
 432#define DA9121_MIN_SEL		(DA9121_MIN_MV / DA9121_STEP_MV)
 433#define DA9121_N_VOLTAGES	(((DA9121_MAX_MV - DA9121_MIN_MV) / DA9121_STEP_MV) \
 434				 + 1 + DA9121_MIN_SEL)
 435
 436static const struct regulator_desc da9121_reg = {
 437	.id = DA9121_IDX_BUCK1,
 438	.name = "da9121",
 439	.of_match = "buck1",
 440	.of_parse_cb = da9121_of_parse_cb,
 441	.owner = THIS_MODULE,
 442	.regulators_node = "regulators",
 443	.of_map_mode = da9121_map_mode,
 444	.ops = &da9121_buck_ops,
 445	.type = REGULATOR_VOLTAGE,
 446	.n_voltages = DA9121_N_VOLTAGES,
 447	.min_uV = DA9121_MIN_MV * 1000,
 448	.uV_step = DA9121_STEP_MV * 1000,
 449	.linear_min_sel = DA9121_MIN_SEL,
 450	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 451	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 452	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
 453	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 454	/* Default value of BUCK_BUCK1_0.CH1_SRC_DVC_UP */
 455	.ramp_delay = 20000,
 456	/* tBUCK_EN */
 457	.enable_time = 20,
 458};
 459
 460static const struct regulator_desc da9220_reg[2] = {
 461	{
 462		.id = DA9121_IDX_BUCK1,
 463		.name = "DA9220/DA9132 BUCK1",
 464		.of_match = "buck1",
 465		.of_parse_cb = da9121_of_parse_cb,
 466		.owner = THIS_MODULE,
 467		.regulators_node = "regulators",
 468		.of_map_mode = da9121_map_mode,
 469		.ops = &da9121_buck_ops,
 470		.type = REGULATOR_VOLTAGE,
 471		.n_voltages = DA9121_N_VOLTAGES,
 472		.min_uV = DA9121_MIN_MV * 1000,
 473		.uV_step = DA9121_STEP_MV * 1000,
 474		.linear_min_sel = DA9121_MIN_SEL,
 475		.enable_reg = DA9121_REG_BUCK_BUCK1_0,
 476		.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 477		.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 478		.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 479	},
 480	{
 481		.id = DA9121_IDX_BUCK2,
 482		.name = "DA9220/DA9132 BUCK2",
 483		.of_match = "buck2",
 484		.of_parse_cb = da9121_of_parse_cb,
 485		.owner = THIS_MODULE,
 486		.regulators_node = "regulators",
 487		.of_map_mode = da9121_map_mode,
 488		.ops = &da9121_buck_ops,
 489		.type = REGULATOR_VOLTAGE,
 490		.n_voltages = DA9121_N_VOLTAGES,
 491		.min_uV = DA9121_MIN_MV * 1000,
 492		.uV_step = DA9121_STEP_MV * 1000,
 493		.linear_min_sel = DA9121_MIN_SEL,
 494		.enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
 495		.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 496		.vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
 497		.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 498	}
 499};
 500
 501static const struct regulator_desc da9122_reg[2] = {
 502	{
 503		.id = DA9121_IDX_BUCK1,
 504		.name = "DA9122/DA9131 BUCK1",
 505		.of_match = "buck1",
 506		.of_parse_cb = da9121_of_parse_cb,
 507		.owner = THIS_MODULE,
 508		.regulators_node = "regulators",
 509		.of_map_mode = da9121_map_mode,
 510		.ops = &da9121_buck_ops,
 511		.type = REGULATOR_VOLTAGE,
 512		.n_voltages = DA9121_N_VOLTAGES,
 513		.min_uV = DA9121_MIN_MV * 1000,
 514		.uV_step = DA9121_STEP_MV * 1000,
 515		.linear_min_sel = DA9121_MIN_SEL,
 516		.enable_reg = DA9121_REG_BUCK_BUCK1_0,
 517		.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 518		.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 519		.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 520	},
 521	{
 522		.id = DA9121_IDX_BUCK2,
 523		.name = "DA9122/DA9131 BUCK2",
 524		.of_match = "buck2",
 525		.of_parse_cb = da9121_of_parse_cb,
 526		.owner = THIS_MODULE,
 527		.regulators_node = "regulators",
 528		.of_map_mode = da9121_map_mode,
 529		.ops = &da9121_buck_ops,
 530		.type = REGULATOR_VOLTAGE,
 531		.n_voltages = DA9121_N_VOLTAGES,
 532		.min_uV = DA9121_MIN_MV * 1000,
 533		.uV_step = DA9121_STEP_MV * 1000,
 534		.linear_min_sel = DA9121_MIN_SEL,
 535		.enable_reg = DA9xxx_REG_BUCK_BUCK2_0,
 536		.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 537		.vsel_reg = DA9xxx_REG_BUCK_BUCK2_5,
 538		.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 539	}
 540};
 541
 542static const struct regulator_desc da9217_reg = {
 543	.id = DA9121_IDX_BUCK1,
 544	.name = "DA9217 BUCK1",
 545	.of_match = "buck1",
 546	.of_parse_cb = da9121_of_parse_cb,
 547	.owner = THIS_MODULE,
 548	.regulators_node = "regulators",
 549	.of_map_mode = da9121_map_mode,
 550	.ops = &da9121_buck_ops,
 551	.type = REGULATOR_VOLTAGE,
 552	.n_voltages = DA9121_N_VOLTAGES,
 553	.min_uV = DA9121_MIN_MV * 1000,
 554	.uV_step = DA9121_STEP_MV * 1000,
 555	.linear_min_sel = DA9121_MIN_SEL,
 556	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
 557	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 558	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 559	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 560};
 561
 562#define DA914X_MIN_MV		500
 563#define DA914X_MAX_MV		1300
 564#define DA914X_STEP_MV		10
 565#define DA914X_MIN_SEL		(DA914X_MIN_MV / DA914X_STEP_MV)
 566#define DA914X_N_VOLTAGES	(((DA914X_MAX_MV - DA914X_MIN_MV) / DA914X_STEP_MV) \
 567				 + 1 + DA914X_MIN_SEL)
 568
 569static const struct regulator_desc da9141_reg = {
 570	.id = DA9121_IDX_BUCK1,
 571	.name = "DA9141",
 572	.of_match = "buck1",
 573	.of_parse_cb = da9121_of_parse_cb,
 574	.owner = THIS_MODULE,
 575	.regulators_node = "regulators",
 576	.of_map_mode = da9121_map_mode,
 577	.ops = &da9121_buck_ops,
 578	.type = REGULATOR_VOLTAGE,
 579	.n_voltages = DA914X_N_VOLTAGES,
 580	.min_uV = DA914X_MIN_MV * 1000,
 581	.uV_step = DA914X_STEP_MV * 1000,
 582	.linear_min_sel = DA914X_MIN_SEL,
 583	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 584	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 585	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
 586	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 587};
 588
 589static const struct regulator_desc da9142_reg = {
 590	.id = DA9121_IDX_BUCK1,
 591	.name = "DA9142 BUCK1",
 592	.of_match = "buck1",
 593	.of_parse_cb = da9121_of_parse_cb,
 594	.owner = THIS_MODULE,
 595	.regulators_node = "regulators",
 596	.of_map_mode = da9121_map_mode,
 597	.ops = &da9121_buck_ops,
 598	.type = REGULATOR_VOLTAGE,
 599	.n_voltages = DA914X_N_VOLTAGES,
 600	.min_uV = DA914X_MIN_MV * 1000,
 601	.uV_step = DA914X_STEP_MV * 1000,
 602	.linear_min_sel = DA914X_MIN_SEL,
 603	.enable_reg = DA9121_REG_BUCK_BUCK1_0,
 604	.enable_mask = DA9121_MASK_BUCK_BUCKx_0_CHx_EN,
 605	.vsel_reg = DA9121_REG_BUCK_BUCK1_5,
 606	.vsel_mask = DA9121_MASK_BUCK_BUCKx_5_CHx_A_VOUT,
 607};
 608
 609
 610static const struct regulator_desc *local_da9121_regulators[][DA9121_IDX_MAX] = {
 611	[DA9121_TYPE_DA9121_DA9130] = { &da9121_reg, NULL },
 612	[DA9121_TYPE_DA9220_DA9132] = { &da9220_reg[0], &da9220_reg[1] },
 613	[DA9121_TYPE_DA9122_DA9131] = { &da9122_reg[0], &da9122_reg[1] },
 614	[DA9121_TYPE_DA9217] = { &da9217_reg, NULL },
 615	[DA9121_TYPE_DA9141] = { &da9141_reg, NULL },
 616	[DA9121_TYPE_DA9142] = { &da9142_reg, NULL },
 617};
 618
 619static void da9121_status_poll_on(struct work_struct *work)
 620{
 621	struct da9121 *chip = container_of(work, struct da9121, work.work);
 622	int status[3] = {0};
 623	int clear[3] = {0};
 624	unsigned long delay;
 625	int i;
 626	int ret;
 627
 628	ret = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_STATUS_0, status, 2);
 629	if (ret < 0) {
 630		dev_err(chip->dev,
 631			"Failed to read STATUS registers: %d\n", ret);
 632		goto error;
 633	}
 634
 635	/* Possible events are tested to be within range for the variant, potentially
 636	 * masked by the IRQ handler (not just warned about), as having been masked,
 637	 * and the respective state cleared - then flagged to unmask for next IRQ.
 638	 */
 639	for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
 640		const struct status_event_data *item = &status_event_handling[i];
 641		int reg_idx = item->reg_index;
 642		bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
 643		bool supported = (item->warn == NULL);
 644		bool persisting = (chip->persistent[reg_idx] & item->event_bit);
 645		bool now_cleared = !(status[reg_idx] & item->status_bit);
 646
 647		if (relevant && supported && persisting && now_cleared) {
 648			clear[reg_idx] |= item->mask_bit;
 649			chip->persistent[reg_idx] &= ~item->event_bit;
 650		}
 651	}
 652
 653	for (i = 0; i < 2; i++) {
 654		if (clear[i]) {
 655			unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
 656			unsigned int mbit = clear[i];
 657
 658			ret = regmap_update_bits(chip->regmap, reg, mbit, 0);
 659			if (ret < 0) {
 660				dev_err(chip->dev,
 661					"Failed to unmask 0x%02x %d\n",
 662					reg, ret);
 663				goto error;
 664			}
 665		}
 666	}
 667
 668	if (chip->persistent[0] | chip->persistent[1]) {
 669		delay = msecs_to_jiffies(chip->passive_delay);
 670		queue_delayed_work(system_freezable_wq, &chip->work, delay);
 671	}
 672
 673error:
 674	return;
 675}
 676
 677static irqreturn_t da9121_irq_handler(int irq, void *data)
 678{
 679	struct da9121 *chip = data;
 680	struct regulator_dev *rdev;
 681	int event[3] = {0};
 682	int handled[3] = {0};
 683	int mask[3] = {0};
 684	int ret = IRQ_NONE;
 685	int i;
 686	int err;
 687
 688	err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_EVENT_0, event, 3);
 689	if (err < 0) {
 690		dev_err(chip->dev, "Failed to read EVENT registers %d\n", err);
 691		ret = IRQ_NONE;
 692		goto error;
 693	}
 694
 695	err = regmap_bulk_read(chip->regmap, DA9121_REG_SYS_MASK_0, mask, 3);
 696	if (err < 0) {
 697		dev_err(chip->dev,
 698			"Failed to read MASK registers: %d\n", ret);
 699		ret = IRQ_NONE;
 700		goto error;
 701	}
 702
 703	rdev = chip->rdev[DA9121_IDX_BUCK1];
 704
 705	/* Possible events are tested to be within range for the variant, currently
 706	 * enabled, and having triggered this IRQ. The event may then be notified,
 707	 * or a warning given for unexpected events - those from device POR, and
 708	 * currently unsupported GPIO configurations.
 709	 */
 710	for (i = 0; i < ARRAY_SIZE(status_event_handling); i++) {
 711		const struct status_event_data *item = &status_event_handling[i];
 712		int reg_idx = item->reg_index;
 713		bool relevant = (item->buck_id <= variant_parameters[chip->variant_id].num_bucks);
 714		bool enabled = !(mask[reg_idx] & item->mask_bit);
 715		bool active = (event[reg_idx] & item->event_bit);
 716		bool notify = (item->warn == NULL);
 717
 718		if (relevant && enabled && active) {
 719			if (notify) {
 720				chip->persistent[reg_idx] |= item->event_bit;
 721				regulator_notifier_call_chain(rdev, item->notification, NULL);
 722			} else {
 723				dev_warn(chip->dev, item->warn);
 724				handled[reg_idx] |= item->event_bit;
 725				ret = IRQ_HANDLED;
 726			}
 727		}
 728	}
 729
 730	for (i = 0; i < 3; i++) {
 731		if (event[i] != handled[i]) {
 732			dev_warn(chip->dev,
 733				"Unhandled event(s) in bank%d 0x%02x\n", i,
 734				event[i] ^ handled[i]);
 735		}
 736	}
 737
 738	/* Mask the interrupts for persistent events OV, OC, UV, WARN, CRIT */
 739	for (i = 0; i < 2; i++) {
 740		if (handled[i]) {
 741			unsigned int reg = DA9121_REG_SYS_MASK_0 + i;
 742			unsigned int mbit = handled[i];
 743
 744			err = regmap_update_bits(chip->regmap, reg, mbit, mbit);
 745			if (err < 0) {
 746				dev_err(chip->dev,
 747					"Failed to mask 0x%02x interrupt %d\n",
 748					reg, err);
 749				ret = IRQ_NONE;
 750				goto error;
 751			}
 752		}
 753	}
 754
 755	/* clear the events */
 756	if (handled[0] | handled[1] | handled[2]) {
 757		err = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_EVENT_0, handled, 3);
 758		if (err < 0) {
 759			dev_err(chip->dev, "Fail to write EVENTs %d\n", err);
 760			ret = IRQ_NONE;
 761			goto error;
 762		}
 763	}
 764
 765	queue_delayed_work(system_freezable_wq, &chip->work, 0);
 766error:
 767	return ret;
 768}
 769
 770static int da9121_set_regulator_config(struct da9121 *chip)
 771{
 772	struct regulator_config config = { };
 773	unsigned int max_matches = variant_parameters[chip->variant_id].num_bucks;
 774	int ret = 0;
 775	int i;
 776
 777	for (i = 0; i < max_matches; i++) {
 778		const struct regulator_desc *regl_desc =
 779			local_da9121_regulators[chip->variant_id][i];
 780
 781		config.dev = chip->dev;
 782		config.driver_data = chip;
 783		config.regmap = chip->regmap;
 784
 785		chip->rdev[i] = devm_regulator_register(chip->dev,
 786					regl_desc, &config);
 787		if (IS_ERR(chip->rdev[i])) {
 788			dev_err(chip->dev, "Failed to register regulator %s, %d/%d\n",
 789				regl_desc->name, (i+1), max_matches);
 790			ret = PTR_ERR(chip->rdev[i]);
 791			goto error;
 792		}
 793	}
 794
 795error:
 796	return ret;
 797}
 798
 799/* DA9121 chip register model */
 800static const struct regmap_range da9121_1ch_readable_ranges[] = {
 801	regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
 802	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
 803	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 804	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
 805	regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
 806};
 807
 808static const struct regmap_access_table da9121_1ch_readable_table = {
 809	.yes_ranges = da9121_1ch_readable_ranges,
 810	.n_yes_ranges = ARRAY_SIZE(da9121_1ch_readable_ranges),
 811};
 812
 813static const struct regmap_range da9121_2ch_readable_ranges[] = {
 814	regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_MASK_3),
 815	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
 816	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 817	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_7),
 818	regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_7),
 819	regmap_reg_range(DA9121_REG_OTP_DEVICE_ID, DA9121_REG_OTP_CONFIG_ID),
 820};
 821
 822static const struct regmap_access_table da9121_2ch_readable_table = {
 823	.yes_ranges = da9121_2ch_readable_ranges,
 824	.n_yes_ranges = ARRAY_SIZE(da9121_2ch_readable_ranges),
 825};
 826
 827static const struct regmap_range da9121_1ch_writeable_ranges[] = {
 828	regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
 829	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
 830	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 831	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
 832	regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_6),
 833};
 834
 835static const struct regmap_access_table da9121_1ch_writeable_table = {
 836	.yes_ranges = da9121_1ch_writeable_ranges,
 837	.n_yes_ranges = ARRAY_SIZE(da9121_1ch_writeable_ranges),
 838};
 839
 840static const struct regmap_range da9121_2ch_writeable_ranges[] = {
 841	regmap_reg_range(DA9121_REG_SYS_EVENT_0, DA9121_REG_SYS_MASK_3),
 842	regmap_reg_range(DA9121_REG_SYS_CONFIG_2, DA9121_REG_SYS_CONFIG_3),
 843	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 844	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_2),
 845	regmap_reg_range(DA9121_REG_BUCK_BUCK1_4, DA9121_REG_BUCK_BUCK1_7),
 846	regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_0, DA9xxx_REG_BUCK_BUCK2_2),
 847	regmap_reg_range(DA9xxx_REG_BUCK_BUCK2_4, DA9xxx_REG_BUCK_BUCK2_7),
 848};
 849
 850static const struct regmap_access_table da9121_2ch_writeable_table = {
 851	.yes_ranges = da9121_2ch_writeable_ranges,
 852	.n_yes_ranges = ARRAY_SIZE(da9121_2ch_writeable_ranges),
 853};
 854
 855
 856static const struct regmap_range da9121_volatile_ranges[] = {
 857	regmap_reg_range(DA9121_REG_SYS_STATUS_0, DA9121_REG_SYS_EVENT_2),
 858	regmap_reg_range(DA9121_REG_SYS_GPIO0_0, DA9121_REG_SYS_GPIO2_1),
 859	regmap_reg_range(DA9121_REG_BUCK_BUCK1_0, DA9121_REG_BUCK_BUCK1_6),
 860};
 861
 862static const struct regmap_access_table da9121_volatile_table = {
 863	.yes_ranges = da9121_volatile_ranges,
 864	.n_yes_ranges = ARRAY_SIZE(da9121_volatile_ranges),
 865};
 866
 867/* DA9121 regmap config for 1 channel variants */
 868static const struct regmap_config da9121_1ch_regmap_config = {
 869	.reg_bits = 8,
 870	.val_bits = 8,
 871	.max_register = DA9121_REG_OTP_CONFIG_ID,
 872	.rd_table = &da9121_1ch_readable_table,
 873	.wr_table = &da9121_1ch_writeable_table,
 874	.volatile_table = &da9121_volatile_table,
 875	.cache_type = REGCACHE_MAPLE,
 876};
 877
 878/* DA9121 regmap config for 2 channel variants */
 879static const struct regmap_config da9121_2ch_regmap_config = {
 880	.reg_bits = 8,
 881	.val_bits = 8,
 882	.max_register = DA9121_REG_OTP_CONFIG_ID,
 883	.rd_table = &da9121_2ch_readable_table,
 884	.wr_table = &da9121_2ch_writeable_table,
 885	.volatile_table = &da9121_volatile_table,
 886	.cache_type = REGCACHE_MAPLE,
 887};
 888
 889static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip)
 890{
 891	u32 device_id;
 892	u32 variant_id;
 893	u8 variant_mrc, variant_vrc;
 894	char *type;
 895	bool config_match = false;
 896	int ret = 0;
 897
 898	ret = regmap_read(chip->regmap, DA9121_REG_OTP_DEVICE_ID, &device_id);
 899	if (ret < 0) {
 900		dev_err(chip->dev, "Cannot read device ID: %d\n", ret);
 901		goto error;
 902	}
 903
 904	ret = regmap_read(chip->regmap, DA9121_REG_OTP_VARIANT_ID, &variant_id);
 905	if (ret < 0) {
 906		dev_err(chip->dev, "Cannot read variant ID: %d\n", ret);
 907		goto error;
 908	}
 909
 910	if ((device_id != DA9121_DEVICE_ID) && (device_id != DA914x_DEVICE_ID)) {
 911		dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
 912		ret = -ENODEV;
 913		goto error;
 914	}
 915
 916	variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC;
 917
 918	switch (chip->subvariant_id) {
 919	case DA9121_SUBTYPE_DA9121:
 920		type = "DA9121";
 921		config_match = (variant_vrc == DA9121_VARIANT_VRC);
 922		break;
 923	case DA9121_SUBTYPE_DA9130:
 924		type = "DA9130";
 925		config_match = (variant_vrc == DA9130_VARIANT_VRC);
 926		break;
 927	case DA9121_SUBTYPE_DA9220:
 928		type = "DA9220";
 929		config_match = (variant_vrc == DA9220_VARIANT_VRC);
 930		break;
 931	case DA9121_SUBTYPE_DA9132:
 932		type = "DA9132";
 933		config_match = (variant_vrc == DA9132_VARIANT_VRC);
 934		break;
 935	case DA9121_SUBTYPE_DA9122:
 936		type = "DA9122";
 937		config_match = (variant_vrc == DA9122_VARIANT_VRC);
 938		break;
 939	case DA9121_SUBTYPE_DA9131:
 940		type = "DA9131";
 941		config_match = (variant_vrc == DA9131_VARIANT_VRC);
 942		break;
 943	case DA9121_SUBTYPE_DA9217:
 944		type = "DA9217";
 945		config_match = (variant_vrc == DA9217_VARIANT_VRC);
 946		break;
 947	default:
 948		type = "Unknown";
 949		break;
 950	}
 951
 952	if (device_id == DA914x_DEVICE_ID) {
 953		switch (chip->subvariant_id) {
 954		case DA9121_SUBTYPE_DA9141:
 955			type = "DA9141";
 956			config_match = (variant_vrc == DA9141_VARIANT_VRC);
 957			break;
 958		case DA9121_SUBTYPE_DA9142:
 959			type = "DA9142";
 960			config_match = (variant_vrc == DA9142_VARIANT_VRC);
 961			break;
 962		default:
 963			type = "Unknown";
 964			break;
 965		}
 966	}
 967
 968	dev_info(chip->dev,
 969		 "Device detected (device-ID: 0x%02X, var-ID: 0x%02X, %s)\n",
 970		 device_id, variant_id, type);
 971
 972	if (!config_match) {
 973		dev_err(chip->dev, "Device tree configuration does not match detected device.\n");
 974		ret = -EINVAL;
 975		goto error;
 976	}
 977
 978	variant_mrc = (variant_id & DA9121_MASK_OTP_VARIANT_ID_MRC)
 979			>> DA9121_SHIFT_OTP_VARIANT_ID_MRC;
 980
 981	if (((device_id == DA9121_DEVICE_ID) &&
 982	     (variant_mrc < DA9121_VARIANT_MRC_BASE)) ||
 983	    ((device_id == DA914x_DEVICE_ID) &&
 984	     (variant_mrc != DA914x_VARIANT_MRC_BASE))) {
 985		dev_err(chip->dev,
 986			"Cannot support variant MRC: 0x%02X\n", variant_mrc);
 987		ret = -EINVAL;
 988	}
 989error:
 990	return ret;
 991}
 992
 993static int da9121_assign_chip_model(struct i2c_client *i2c,
 994			struct da9121 *chip)
 995{
 996	const struct regmap_config *regmap;
 997	int ret = 0;
 998
 999	chip->dev = &i2c->dev;
1000
1001	/* Use configured subtype to select the regulator descriptor index and
1002	 * register map, common to both consumer and automotive grade variants
1003	 */
1004	switch (chip->subvariant_id) {
1005	case DA9121_SUBTYPE_DA9121:
1006	case DA9121_SUBTYPE_DA9130:
1007		chip->variant_id = DA9121_TYPE_DA9121_DA9130;
1008		regmap = &da9121_1ch_regmap_config;
1009		break;
1010	case DA9121_SUBTYPE_DA9217:
1011		chip->variant_id = DA9121_TYPE_DA9217;
1012		regmap = &da9121_1ch_regmap_config;
1013		break;
1014	case DA9121_SUBTYPE_DA9122:
1015	case DA9121_SUBTYPE_DA9131:
1016		chip->variant_id = DA9121_TYPE_DA9122_DA9131;
1017		regmap = &da9121_2ch_regmap_config;
1018		break;
1019	case DA9121_SUBTYPE_DA9220:
1020	case DA9121_SUBTYPE_DA9132:
1021		chip->variant_id = DA9121_TYPE_DA9220_DA9132;
1022		regmap = &da9121_2ch_regmap_config;
1023		break;
1024	case DA9121_SUBTYPE_DA9141:
1025		chip->variant_id = DA9121_TYPE_DA9141;
1026		regmap = &da9121_1ch_regmap_config;
1027		break;
1028	case DA9121_SUBTYPE_DA9142:
1029		chip->variant_id = DA9121_TYPE_DA9142;
1030		regmap = &da9121_2ch_regmap_config;
1031		break;
1032	default:
1033		return -EINVAL;
1034	}
1035
1036	/* Set these up for of_regulator_match call which may want .of_map_modes */
1037	da9121_matches[0].desc = local_da9121_regulators[chip->variant_id][0];
1038	da9121_matches[1].desc = local_da9121_regulators[chip->variant_id][1];
1039
1040	chip->regmap = devm_regmap_init_i2c(i2c, regmap);
1041	if (IS_ERR(chip->regmap)) {
1042		ret = PTR_ERR(chip->regmap);
1043		dev_err(chip->dev, "Failed to configure a register map: %d\n",
1044			ret);
1045		return ret;
1046	}
1047
1048	ret = da9121_check_device_type(i2c, chip);
1049
1050	return ret;
1051}
1052
1053static int da9121_config_irq(struct i2c_client *i2c,
1054			struct da9121 *chip)
1055{
1056	unsigned int p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
1057	const int mask_all[4] = { 0, 0, 0xFF, 0xFF };
1058	int ret = 0;
1059
1060	chip->chip_irq = i2c->irq;
1061
1062	if (chip->chip_irq != 0) {
1063		if (!of_property_read_u32(chip->dev->of_node,
1064					  "dlg,irq-polling-delay-passive-ms",
1065					  &p_delay)) {
1066			if (p_delay < DA9121_MIN_POLLING_PERIOD_MS ||
1067			    p_delay > DA9121_MAX_POLLING_PERIOD_MS) {
1068				dev_warn(chip->dev,
1069					 "Out-of-range polling period %d ms\n",
1070					 p_delay);
1071				p_delay = DA9121_DEFAULT_POLLING_PERIOD_MS;
1072			}
1073		}
1074
1075		chip->passive_delay = p_delay;
1076
1077		ret = request_threaded_irq(chip->chip_irq, NULL,
1078					da9121_irq_handler,
1079					IRQF_TRIGGER_LOW|IRQF_ONESHOT,
1080					"da9121", chip);
1081		if (ret != 0) {
1082			dev_err(chip->dev, "Failed IRQ request: %d\n",
1083				chip->chip_irq);
1084			goto error;
1085		}
1086
1087		ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1088		if (ret != 0) {
1089			dev_err(chip->dev, "Failed to set IRQ masks: %d\n",
1090				ret);
1091			goto regmap_error;
1092		}
1093
1094		INIT_DELAYED_WORK(&chip->work, da9121_status_poll_on);
1095		dev_info(chip->dev, "Interrupt polling period set at %d ms\n",
1096			 chip->passive_delay);
1097	}
1098error:
1099	return ret;
1100regmap_error:
1101	free_irq(chip->chip_irq, chip);
1102	return ret;
1103}
1104
1105static const struct of_device_id da9121_dt_ids[] = {
1106	{ .compatible = "dlg,da9121", .data = (void *) DA9121_SUBTYPE_DA9121 },
1107	{ .compatible = "dlg,da9130", .data = (void *) DA9121_SUBTYPE_DA9130 },
1108	{ .compatible = "dlg,da9217", .data = (void *) DA9121_SUBTYPE_DA9217 },
1109	{ .compatible = "dlg,da9122", .data = (void *) DA9121_SUBTYPE_DA9122 },
1110	{ .compatible = "dlg,da9131", .data = (void *) DA9121_SUBTYPE_DA9131 },
1111	{ .compatible = "dlg,da9220", .data = (void *) DA9121_SUBTYPE_DA9220 },
1112	{ .compatible = "dlg,da9132", .data = (void *) DA9121_SUBTYPE_DA9132 },
1113	{ .compatible = "dlg,da9141", .data = (void *) DA9121_SUBTYPE_DA9141 },
1114	{ .compatible = "dlg,da9142", .data = (void *) DA9121_SUBTYPE_DA9142 },
1115	{ }
1116};
1117MODULE_DEVICE_TABLE(of, da9121_dt_ids);
1118
1119static int da9121_i2c_probe(struct i2c_client *i2c)
1120{
1121	struct da9121 *chip;
1122	const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
1123	int ret = 0;
1124
1125	chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL);
1126	if (!chip) {
1127		ret = -ENOMEM;
1128		goto error;
1129	}
1130
1131	chip->pdata = i2c->dev.platform_data;
1132	chip->subvariant_id = (enum da9121_subvariant)i2c_get_match_data(i2c);
1133
1134	ret = da9121_assign_chip_model(i2c, chip);
1135	if (ret < 0)
1136		goto error;
1137
1138	ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1139	if (ret != 0) {
1140		dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
1141		goto error;
1142	}
1143
1144	ret = da9121_set_regulator_config(chip);
1145	if (ret < 0)
1146		goto error;
1147
1148	ret = da9121_config_irq(i2c, chip);
1149
1150error:
1151	return ret;
1152}
1153
1154static void da9121_i2c_remove(struct i2c_client *i2c)
1155{
1156	struct da9121 *chip = i2c_get_clientdata(i2c);
1157	const int mask_all[4] = { 0xFF, 0xFF, 0xFF, 0xFF };
1158	int ret;
1159
1160	free_irq(chip->chip_irq, chip);
1161	cancel_delayed_work_sync(&chip->work);
1162
1163	ret = regmap_bulk_write(chip->regmap, DA9121_REG_SYS_MASK_0, mask_all, 4);
1164	if (ret != 0)
1165		dev_err(chip->dev, "Failed to set IRQ masks: %d\n", ret);
1166}
1167
1168static const struct i2c_device_id da9121_i2c_id[] = {
1169	{"da9121", DA9121_TYPE_DA9121_DA9130},
1170	{"da9130", DA9121_TYPE_DA9121_DA9130},
1171	{"da9217", DA9121_TYPE_DA9217},
1172	{"da9122", DA9121_TYPE_DA9122_DA9131},
1173	{"da9131", DA9121_TYPE_DA9122_DA9131},
1174	{"da9220", DA9121_TYPE_DA9220_DA9132},
1175	{"da9132", DA9121_TYPE_DA9220_DA9132},
1176	{"da9141", DA9121_TYPE_DA9141},
1177	{"da9142", DA9121_TYPE_DA9142},
1178	{},
1179};
1180MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);
1181
1182static struct i2c_driver da9121_regulator_driver = {
1183	.driver = {
1184		.name = "da9121",
1185		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
1186		.of_match_table = da9121_dt_ids,
1187	},
1188	.probe = da9121_i2c_probe,
1189	.remove = da9121_i2c_remove,
1190	.id_table = da9121_i2c_id,
1191};
1192
1193module_i2c_driver(da9121_regulator_driver);
1194
1195MODULE_DESCRIPTION("Dialog Semiconductor DA9121/DA9122/DA9220/DA9217/DA9130/DA9131/DA9132 regulator driver");
1196MODULE_LICENSE("GPL v2");