drivers/regulator/da9121-regulator.c

   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 */
  32 struct 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  */
  48 struct da9121_range {
  49         int val_min;
  50         int val_max;
  51         int val_stp;
  52         int reg_min;
  53         int reg_max;
  54 };
  55
  56 static 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
  64 static 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
  72 static 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
  80 static 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
  88 static 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
  96 static 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
 104 struct da9121_variant_info {
 105         int num_bucks;
 106         int num_phases;
 107         const struct da9121_range *current_range;
 108 };
 109
 110 static 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
 119 struct da9121_field {
 120         unsigned int reg;
 121         unsigned int msk;
 122 };
 123
 124 static 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
 129 static 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
 134 struct 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  */
 170 static 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
 187 static 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));
 213 error:
 214         return ret;
 215 }
 216
 217 static 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;
 253 error:
 254         return ret;
 255 }
 256
 257 static 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
 289 error:
 290         return ret;
 291 }
 292
 293 static 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
 309 static 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
 338 static 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
 358 static 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
 371 static struct of_regulator_match da9121_matches[] = {
 372         [DA9121_IDX_BUCK1] = { .name = "buck1" },
 373         [DA9121_IDX_BUCK2] = { .name = "buck2" },
 374 };
 375
 376 static 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
 436 static 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
 460 static 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
 501 static 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
 542 static 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
 569 static 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
 589 static 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
 610 static 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
 619 static 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
 673 error:
 674         return;
 675 }
 676
 677 static 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);
 766 error:
 767         return ret;
 768 }
 769
 770 static 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
 795 error:
 796         return ret;
 797 }
 798
 799 /* DA9121 chip register model */
 800 static 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
 808 static 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
 813 static 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
 822 static 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
 827 static 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
 835 static 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
 840 static 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
 850 static 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
 856 static 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
 862 static 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 */
 868 static 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 */
 879 static 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
 889 static 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         }
 989 error:
 990         return ret;
 991 }
 992
 993 static 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
1053 static 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         }
1098 error:
1099         return ret;
1100 regmap_error:
1101         free_irq(chip->chip_irq, chip);
1102         return ret;
1103 }
1104
1105 static 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 };
1117 MODULE_DEVICE_TABLE(of, da9121_dt_ids);
1118
1119 static 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
1150 error:
1151         return ret;
1152 }
1153
1154 static 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
1168 static 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 };
1180 MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);
1181
1182 static 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
1193 module_i2c_driver(da9121_regulator_driver);
1194
1195 MODULE_DESCRIPTION("Dialog Semiconductor DA9121/DA9122/DA9220/DA9217/DA9130/DA9131/DA9132 regulator driver");
1196 MODULE_LICENSE("GPL v2");