drivers/regulator/tps6594-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Regulator driver for tps6594 PMIC
   4 //
   5 // Copyright (C) 2023 BayLibre Incorporated - https://www.baylibre.com/
   6
   7 #include <linux/device.h>
   8 #include <linux/err.h>
   9 #include <linux/init.h>
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/of.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/regmap.h>
  15 #include <linux/regulator/driver.h>
  16 #include <linux/regulator/machine.h>
  17 #include <linux/regulator/of_regulator.h>
  18
  19 #include <linux/mfd/tps6594.h>
  20
  21 #define BUCK_NB         5
  22 #define LDO_NB          4
  23 #define MULTI_PHASE_NB  4
  24 #define REGS_INT_NB     4
  25
  26 enum tps6594_regulator_id {
  27         /* DCDC's */
  28         TPS6594_BUCK_1,
  29         TPS6594_BUCK_2,
  30         TPS6594_BUCK_3,
  31         TPS6594_BUCK_4,
  32         TPS6594_BUCK_5,
  33
  34         /* LDOs */
  35         TPS6594_LDO_1,
  36         TPS6594_LDO_2,
  37         TPS6594_LDO_3,
  38         TPS6594_LDO_4,
  39 };
  40
  41 enum tps6594_multi_regulator_id {
  42         /* Multi-phase DCDC's */
  43         TPS6594_BUCK_12,
  44         TPS6594_BUCK_34,
  45         TPS6594_BUCK_123,
  46         TPS6594_BUCK_1234,
  47 };
  48
  49 struct tps6594_regulator_irq_type {
  50         const char *irq_name;
  51         const char *regulator_name;
  52         const char *event_name;
  53         unsigned long event;
  54 };
  55
  56 static struct tps6594_regulator_irq_type tps6594_ext_regulator_irq_types[] = {
  57         { TPS6594_IRQ_NAME_VCCA_OV, "VCCA", "overvoltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
  58         { TPS6594_IRQ_NAME_VCCA_UV, "VCCA", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
  59         { TPS6594_IRQ_NAME_VMON1_OV, "VMON1", "overvoltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
  60         { TPS6594_IRQ_NAME_VMON1_UV, "VMON1", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
  61         { TPS6594_IRQ_NAME_VMON1_RV, "VMON1", "residual voltage",
  62           REGULATOR_EVENT_OVER_VOLTAGE_WARN },
  63         { TPS6594_IRQ_NAME_VMON2_OV, "VMON2", "overvoltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
  64         { TPS6594_IRQ_NAME_VMON2_UV, "VMON2", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
  65         { TPS6594_IRQ_NAME_VMON2_RV, "VMON2", "residual voltage",
  66           REGULATOR_EVENT_OVER_VOLTAGE_WARN },
  67 };
  68
  69 struct tps6594_regulator_irq_data {
  70         struct device *dev;
  71         struct tps6594_regulator_irq_type *type;
  72         struct regulator_dev *rdev;
  73 };
  74
  75 struct tps6594_ext_regulator_irq_data {
  76         struct device *dev;
  77         struct tps6594_regulator_irq_type *type;
  78 };
  79
  80 #define TPS6594_REGULATOR(_name, _of, _id, _type, _ops, _n, _vr, _vm, _er, \
  81                            _em, _cr, _cm, _lr, _nlr, _delay, _fuv, \
  82                            _ct, _ncl, _bpm) \
  83         {                                                               \
  84                 .name                   = _name,                        \
  85                 .of_match               = _of,                          \
  86                 .regulators_node        = of_match_ptr("regulators"),   \
  87                 .supply_name            = _of,                          \
  88                 .id                     = _id,                          \
  89                 .ops                    = &(_ops),                      \
  90                 .n_voltages             = _n,                           \
  91                 .type                   = _type,                        \
  92                 .owner                  = THIS_MODULE,                  \
  93                 .vsel_reg               = _vr,                          \
  94                 .vsel_mask              = _vm,                          \
  95                 .csel_reg               = _cr,                          \
  96                 .csel_mask              = _cm,                          \
  97                 .curr_table             = _ct,                          \
  98                 .n_current_limits       = _ncl,                         \
  99                 .enable_reg             = _er,                          \
 100                 .enable_mask            = _em,                          \
 101                 .volt_table             = NULL,                         \
 102                 .linear_ranges          = _lr,                          \
 103                 .n_linear_ranges        = _nlr,                         \
 104                 .ramp_delay             = _delay,                       \
 105                 .fixed_uV               = _fuv,                         \
 106                 .bypass_reg             = _vr,                          \
 107                 .bypass_mask            = _bpm,                         \
 108         }                                                               \
 109
 110 static const struct linear_range bucks_ranges[] = {
 111         REGULATOR_LINEAR_RANGE(300000, 0x0, 0xe, 20000),
 112         REGULATOR_LINEAR_RANGE(600000, 0xf, 0x72, 5000),
 113         REGULATOR_LINEAR_RANGE(1100000, 0x73, 0xaa, 10000),
 114         REGULATOR_LINEAR_RANGE(1660000, 0xab, 0xff, 20000),
 115 };
 116
 117 static const struct linear_range ldos_1_2_3_ranges[] = {
 118         REGULATOR_LINEAR_RANGE(600000, 0x4, 0x3a, 50000),
 119 };
 120
 121 static const struct linear_range ldos_4_ranges[] = {
 122         REGULATOR_LINEAR_RANGE(1200000, 0x20, 0x74, 25000),
 123 };
 124
 125 /* Operations permitted on BUCK1/2/3/4/5 */
 126 static const struct regulator_ops tps6594_bucks_ops = {
 127         .is_enabled             = regulator_is_enabled_regmap,
 128         .enable                 = regulator_enable_regmap,
 129         .disable                = regulator_disable_regmap,
 130         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 131         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 132         .list_voltage           = regulator_list_voltage_linear_range,
 133         .map_voltage            = regulator_map_voltage_linear_range,
 134         .set_voltage_time_sel   = regulator_set_voltage_time_sel,
 135
 136 };
 137
 138 /* Operations permitted on LDO1/2/3 */
 139 static const struct regulator_ops tps6594_ldos_1_2_3_ops = {
 140         .is_enabled             = regulator_is_enabled_regmap,
 141         .enable                 = regulator_enable_regmap,
 142         .disable                = regulator_disable_regmap,
 143         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 144         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 145         .list_voltage           = regulator_list_voltage_linear_range,
 146         .map_voltage            = regulator_map_voltage_linear_range,
 147         .set_bypass             = regulator_set_bypass_regmap,
 148         .get_bypass             = regulator_get_bypass_regmap,
 149 };
 150
 151 /* Operations permitted on LDO4 */
 152 static const struct regulator_ops tps6594_ldos_4_ops = {
 153         .is_enabled             = regulator_is_enabled_regmap,
 154         .enable                 = regulator_enable_regmap,
 155         .disable                = regulator_disable_regmap,
 156         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 157         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 158         .list_voltage           = regulator_list_voltage_linear_range,
 159         .map_voltage            = regulator_map_voltage_linear_range,
 160 };
 161
 162 static const struct regulator_desc buck_regs[] = {
 163         TPS6594_REGULATOR("BUCK1", "buck1", TPS6594_BUCK_1,
 164                           REGULATOR_VOLTAGE, tps6594_bucks_ops, TPS6594_MASK_BUCKS_VSET,
 165                           TPS6594_REG_BUCKX_VOUT_1(0),
 166                           TPS6594_MASK_BUCKS_VSET,
 167                           TPS6594_REG_BUCKX_CTRL(0),
 168                           TPS6594_BIT_BUCK_EN, 0, 0, bucks_ranges,
 169                           4, 0, 0, NULL, 0, 0),
 170         TPS6594_REGULATOR("BUCK2", "buck2", TPS6594_BUCK_2,
 171                           REGULATOR_VOLTAGE, tps6594_bucks_ops, TPS6594_MASK_BUCKS_VSET,
 172                           TPS6594_REG_BUCKX_VOUT_1(1),
 173                           TPS6594_MASK_BUCKS_VSET,
 174                           TPS6594_REG_BUCKX_CTRL(1),
 175                           TPS6594_BIT_BUCK_EN, 0, 0, bucks_ranges,
 176                           4, 0, 0, NULL, 0, 0),
 177         TPS6594_REGULATOR("BUCK3", "buck3", TPS6594_BUCK_3,
 178                           REGULATOR_VOLTAGE, tps6594_bucks_ops, TPS6594_MASK_BUCKS_VSET,
 179                           TPS6594_REG_BUCKX_VOUT_1(2),
 180                           TPS6594_MASK_BUCKS_VSET,
 181                           TPS6594_REG_BUCKX_CTRL(2),
 182                           TPS6594_BIT_BUCK_EN, 0, 0, bucks_ranges,
 183                           4, 0, 0, NULL, 0, 0),
 184         TPS6594_REGULATOR("BUCK4", "buck4", TPS6594_BUCK_4,
 185                           REGULATOR_VOLTAGE, tps6594_bucks_ops, TPS6594_MASK_BUCKS_VSET,
 186                           TPS6594_REG_BUCKX_VOUT_1(3),
 187                           TPS6594_MASK_BUCKS_VSET,
 188                           TPS6594_REG_BUCKX_CTRL(3),
 189                           TPS6594_BIT_BUCK_EN, 0, 0, bucks_ranges,
 190                           4, 0, 0, NULL, 0, 0),
 191         TPS6594_REGULATOR("BUCK5", "buck5", TPS6594_BUCK_5,
 192                           REGULATOR_VOLTAGE, tps6594_bucks_ops, TPS6594_MASK_BUCKS_VSET,
 193                           TPS6594_REG_BUCKX_VOUT_1(4),
 194                           TPS6594_MASK_BUCKS_VSET,
 195                           TPS6594_REG_BUCKX_CTRL(4),
 196                           TPS6594_BIT_BUCK_EN, 0, 0, bucks_ranges,
 197                           4, 0, 0, NULL, 0, 0),
 198 };
 199
 200 static struct tps6594_regulator_irq_type tps6594_buck1_irq_types[] = {
 201         { TPS6594_IRQ_NAME_BUCK1_OV, "BUCK1", "overvoltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
 202         { TPS6594_IRQ_NAME_BUCK1_UV, "BUCK1", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
 203         { TPS6594_IRQ_NAME_BUCK1_SC, "BUCK1", "short circuit", REGULATOR_EVENT_REGULATION_OUT },
 204         { TPS6594_IRQ_NAME_BUCK1_ILIM, "BUCK1", "reach ilim, overcurrent",
 205           REGULATOR_EVENT_OVER_CURRENT },
 206 };
 207
 208 static struct tps6594_regulator_irq_type tps6594_buck2_irq_types[] = {
 209         { TPS6594_IRQ_NAME_BUCK2_OV, "BUCK2", "overvoltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
 210         { TPS6594_IRQ_NAME_BUCK2_UV, "BUCK2", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
 211         { TPS6594_IRQ_NAME_BUCK2_SC, "BUCK2", "short circuit", REGULATOR_EVENT_REGULATION_OUT },
 212         { TPS6594_IRQ_NAME_BUCK2_ILIM, "BUCK2", "reach ilim, overcurrent",
 213           REGULATOR_EVENT_OVER_CURRENT },
 214 };
 215
 216 static struct tps6594_regulator_irq_type tps6594_buck3_irq_types[] = {
 217         { TPS6594_IRQ_NAME_BUCK3_OV, "BUCK3", "overvoltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
 218         { TPS6594_IRQ_NAME_BUCK3_UV, "BUCK3", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
 219         { TPS6594_IRQ_NAME_BUCK3_SC, "BUCK3", "short circuit", REGULATOR_EVENT_REGULATION_OUT },
 220         { TPS6594_IRQ_NAME_BUCK3_ILIM, "BUCK3", "reach ilim, overcurrent",
 221           REGULATOR_EVENT_OVER_CURRENT },
 222 };
 223
 224 static struct tps6594_regulator_irq_type tps6594_buck4_irq_types[] = {
 225         { TPS6594_IRQ_NAME_BUCK4_OV, "BUCK4", "overvoltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
 226         { TPS6594_IRQ_NAME_BUCK4_UV, "BUCK4", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
 227         { TPS6594_IRQ_NAME_BUCK4_SC, "BUCK4", "short circuit", REGULATOR_EVENT_REGULATION_OUT },
 228         { TPS6594_IRQ_NAME_BUCK4_ILIM, "BUCK4", "reach ilim, overcurrent",
 229           REGULATOR_EVENT_OVER_CURRENT },
 230 };
 231
 232 static struct tps6594_regulator_irq_type tps6594_buck5_irq_types[] = {
 233         { TPS6594_IRQ_NAME_BUCK5_OV, "BUCK5", "overvoltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
 234         { TPS6594_IRQ_NAME_BUCK5_UV, "BUCK5", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
 235         { TPS6594_IRQ_NAME_BUCK5_SC, "BUCK5", "short circuit", REGULATOR_EVENT_REGULATION_OUT },
 236         { TPS6594_IRQ_NAME_BUCK5_ILIM, "BUCK5", "reach ilim, overcurrent",
 237           REGULATOR_EVENT_OVER_CURRENT },
 238 };
 239
 240 static struct tps6594_regulator_irq_type tps6594_ldo1_irq_types[] = {
 241         { TPS6594_IRQ_NAME_LDO1_OV, "LDO1", "overvoltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
 242         { TPS6594_IRQ_NAME_LDO1_UV, "LDO1", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
 243         { TPS6594_IRQ_NAME_LDO1_SC, "LDO1", "short circuit", REGULATOR_EVENT_REGULATION_OUT },
 244         { TPS6594_IRQ_NAME_LDO1_ILIM, "LDO1", "reach ilim, overcurrent",
 245           REGULATOR_EVENT_OVER_CURRENT },
 246 };
 247
 248 static struct tps6594_regulator_irq_type tps6594_ldo2_irq_types[] = {
 249         { TPS6594_IRQ_NAME_LDO2_OV, "LDO2", "overvoltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
 250         { TPS6594_IRQ_NAME_LDO2_UV, "LDO2", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
 251         { TPS6594_IRQ_NAME_LDO2_SC, "LDO2", "short circuit", REGULATOR_EVENT_REGULATION_OUT },
 252         { TPS6594_IRQ_NAME_LDO2_ILIM, "LDO2", "reach ilim, overcurrent",
 253           REGULATOR_EVENT_OVER_CURRENT },
 254 };
 255
 256 static struct tps6594_regulator_irq_type tps6594_ldo3_irq_types[] = {
 257         { TPS6594_IRQ_NAME_LDO3_OV, "LDO3", "overvoltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
 258         { TPS6594_IRQ_NAME_LDO3_UV, "LDO3", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
 259         { TPS6594_IRQ_NAME_LDO3_SC, "LDO3", "short circuit", REGULATOR_EVENT_REGULATION_OUT },
 260         { TPS6594_IRQ_NAME_LDO3_ILIM, "LDO3", "reach ilim, overcurrent",
 261           REGULATOR_EVENT_OVER_CURRENT },
 262 };
 263
 264 static struct tps6594_regulator_irq_type tps6594_ldo4_irq_types[] = {
 265         { TPS6594_IRQ_NAME_LDO4_OV, "LDO4", "overvoltage", REGULATOR_EVENT_OVER_VOLTAGE_WARN },
 266         { TPS6594_IRQ_NAME_LDO4_UV, "LDO4", "undervoltage", REGULATOR_EVENT_UNDER_VOLTAGE },
 267         { TPS6594_IRQ_NAME_LDO4_SC, "LDO4", "short circuit", REGULATOR_EVENT_REGULATION_OUT },
 268         { TPS6594_IRQ_NAME_LDO4_ILIM, "LDO4", "reach ilim, overcurrent",
 269           REGULATOR_EVENT_OVER_CURRENT },
 270 };
 271
 272 static struct tps6594_regulator_irq_type *tps6594_bucks_irq_types[] = {
 273         tps6594_buck1_irq_types,
 274         tps6594_buck2_irq_types,
 275         tps6594_buck3_irq_types,
 276         tps6594_buck4_irq_types,
 277         tps6594_buck5_irq_types,
 278 };
 279
 280 static struct tps6594_regulator_irq_type *tps6594_ldos_irq_types[] = {
 281         tps6594_ldo1_irq_types,
 282         tps6594_ldo2_irq_types,
 283         tps6594_ldo3_irq_types,
 284         tps6594_ldo4_irq_types,
 285 };
 286
 287 static const struct regulator_desc multi_regs[] = {
 288         TPS6594_REGULATOR("BUCK12", "buck12", TPS6594_BUCK_1,
 289                           REGULATOR_VOLTAGE, tps6594_bucks_ops, TPS6594_MASK_BUCKS_VSET,
 290                           TPS6594_REG_BUCKX_VOUT_1(1),
 291                           TPS6594_MASK_BUCKS_VSET,
 292                           TPS6594_REG_BUCKX_CTRL(1),
 293                           TPS6594_BIT_BUCK_EN, 0, 0, bucks_ranges,
 294                           4, 4000, 0, NULL, 0, 0),
 295         TPS6594_REGULATOR("BUCK34", "buck34", TPS6594_BUCK_3,
 296                           REGULATOR_VOLTAGE, tps6594_bucks_ops, TPS6594_MASK_BUCKS_VSET,
 297                           TPS6594_REG_BUCKX_VOUT_1(3),
 298                           TPS6594_MASK_BUCKS_VSET,
 299                           TPS6594_REG_BUCKX_CTRL(3),
 300                           TPS6594_BIT_BUCK_EN, 0, 0, bucks_ranges,
 301                           4, 0, 0, NULL, 0, 0),
 302         TPS6594_REGULATOR("BUCK123", "buck123", TPS6594_BUCK_1,
 303                           REGULATOR_VOLTAGE, tps6594_bucks_ops, TPS6594_MASK_BUCKS_VSET,
 304                           TPS6594_REG_BUCKX_VOUT_1(1),
 305                           TPS6594_MASK_BUCKS_VSET,
 306                           TPS6594_REG_BUCKX_CTRL(1),
 307                           TPS6594_BIT_BUCK_EN, 0, 0, bucks_ranges,
 308                           4, 4000, 0, NULL, 0, 0),
 309         TPS6594_REGULATOR("BUCK1234", "buck1234", TPS6594_BUCK_1,
 310                           REGULATOR_VOLTAGE, tps6594_bucks_ops, TPS6594_MASK_BUCKS_VSET,
 311                           TPS6594_REG_BUCKX_VOUT_1(1),
 312                           TPS6594_MASK_BUCKS_VSET,
 313                           TPS6594_REG_BUCKX_CTRL(1),
 314                           TPS6594_BIT_BUCK_EN, 0, 0, bucks_ranges,
 315                           4, 4000, 0, NULL, 0, 0),
 316 };
 317
 318 static const struct regulator_desc ldo_regs[] = {
 319         TPS6594_REGULATOR("LDO1", "ldo1", TPS6594_LDO_1,
 320                           REGULATOR_VOLTAGE, tps6594_ldos_1_2_3_ops, TPS6594_MASK_LDO123_VSET,
 321                           TPS6594_REG_LDOX_VOUT(0),
 322                           TPS6594_MASK_LDO123_VSET,
 323                           TPS6594_REG_LDOX_CTRL(0),
 324                           TPS6594_BIT_LDO_EN, 0, 0, ldos_1_2_3_ranges,
 325                           1, 0, 0, NULL, 0, TPS6594_BIT_LDO_BYPASS),
 326         TPS6594_REGULATOR("LDO2", "ldo2", TPS6594_LDO_2,
 327                           REGULATOR_VOLTAGE, tps6594_ldos_1_2_3_ops, TPS6594_MASK_LDO123_VSET,
 328                           TPS6594_REG_LDOX_VOUT(1),
 329                           TPS6594_MASK_LDO123_VSET,
 330                           TPS6594_REG_LDOX_CTRL(1),
 331                           TPS6594_BIT_LDO_EN, 0, 0, ldos_1_2_3_ranges,
 332                           1, 0, 0, NULL, 0, TPS6594_BIT_LDO_BYPASS),
 333         TPS6594_REGULATOR("LDO3", "ldo3", TPS6594_LDO_3,
 334                           REGULATOR_VOLTAGE, tps6594_ldos_1_2_3_ops, TPS6594_MASK_LDO123_VSET,
 335                           TPS6594_REG_LDOX_VOUT(2),
 336                           TPS6594_MASK_LDO123_VSET,
 337                           TPS6594_REG_LDOX_CTRL(2),
 338                           TPS6594_BIT_LDO_EN, 0, 0, ldos_1_2_3_ranges,
 339                           1, 0, 0, NULL, 0, TPS6594_BIT_LDO_BYPASS),
 340         TPS6594_REGULATOR("LDO4", "ldo4", TPS6594_LDO_4,
 341                           REGULATOR_VOLTAGE, tps6594_ldos_4_ops, TPS6594_MASK_LDO4_VSET >> 1,
 342                           TPS6594_REG_LDOX_VOUT(3),
 343                           TPS6594_MASK_LDO4_VSET,
 344                           TPS6594_REG_LDOX_CTRL(3),
 345                           TPS6594_BIT_LDO_EN, 0, 0, ldos_4_ranges,
 346                           1, 0, 0, NULL, 0, 0),
 347 };
 348
 349 static irqreturn_t tps6594_regulator_irq_handler(int irq, void *data)
 350 {
 351         struct tps6594_regulator_irq_data *irq_data = data;
 352
 353         if (irq_data->type->event_name[0] == '\0') {
 354                 /* This is the timeout interrupt no specific regulator */
 355                 dev_err(irq_data->dev,
 356                         "System was put in shutdown due to timeout during an active or standby transition.\n");
 357                 return IRQ_HANDLED;
 358         }
 359
 360         dev_err(irq_data->dev, "Error IRQ trap %s for %s\n",
 361                 irq_data->type->event_name, irq_data->type->regulator_name);
 362
 363         regulator_notifier_call_chain(irq_data->rdev,
 364                                       irq_data->type->event, NULL);
 365
 366         return IRQ_HANDLED;
 367 }
 368
 369 static int tps6594_request_reg_irqs(struct platform_device *pdev,
 370                                     struct regulator_dev *rdev,
 371                                     struct tps6594_regulator_irq_data *irq_data,
 372                                     struct tps6594_regulator_irq_type *tps6594_regs_irq_types,
 373                                     int *irq_idx)
 374 {
 375         struct tps6594_regulator_irq_type *irq_type;
 376         struct tps6594 *tps = dev_get_drvdata(pdev->dev.parent);
 377         int j;
 378         int irq;
 379         int error;
 380
 381         for (j = 0; j < REGS_INT_NB; j++) {
 382                 irq_type = &tps6594_regs_irq_types[j];
 383                 irq = platform_get_irq_byname(pdev, irq_type->irq_name);
 384                 if (irq < 0)
 385                         return -EINVAL;
 386
 387                 irq_data[*irq_idx + j].dev = tps->dev;
 388                 irq_data[*irq_idx + j].type = irq_type;
 389                 irq_data[*irq_idx + j].rdev = rdev;
 390
 391                 error = devm_request_threaded_irq(tps->dev, irq, NULL,
 392                                                   tps6594_regulator_irq_handler,
 393                                                   IRQF_ONESHOT,
 394                                                   irq_type->irq_name,
 395                                                   &irq_data[*irq_idx]);
 396                 (*irq_idx)++;
 397                 if (error) {
 398                         dev_err(tps->dev, "tps6594 failed to request %s IRQ %d: %d\n",
 399                                 irq_type->irq_name, irq, error);
 400                         return error;
 401                 }
 402         }
 403         return 0;
 404 }
 405
 406 static int tps6594_regulator_probe(struct platform_device *pdev)
 407 {
 408         struct tps6594 *tps = dev_get_drvdata(pdev->dev.parent);
 409         struct regulator_dev *rdev;
 410         struct device_node *np = NULL;
 411         struct device_node *np_pmic_parent = NULL;
 412         struct regulator_config config = {};
 413         struct tps6594_regulator_irq_data *irq_data;
 414         struct tps6594_ext_regulator_irq_data *irq_ext_reg_data;
 415         struct tps6594_regulator_irq_type *irq_type;
 416         u8 buck_configured[BUCK_NB] = { 0 };
 417         u8 buck_multi[MULTI_PHASE_NB] = { 0 };
 418         static const char * const multiphases[] = {"buck12", "buck123", "buck1234", "buck34"};
 419         static const char *npname;
 420         int error, i, irq, multi, delta;
 421         int irq_idx = 0;
 422         int buck_idx = 0;
 423         int ext_reg_irq_nb = 2;
 424
 425         enum {
 426                 MULTI_BUCK12,
 427                 MULTI_BUCK123,
 428                 MULTI_BUCK1234,
 429                 MULTI_BUCK12_34,
 430                 MULTI_FIRST = MULTI_BUCK12,
 431                 MULTI_LAST = MULTI_BUCK12_34,
 432                 MULTI_NUM = MULTI_LAST - MULTI_FIRST + 1
 433         };
 434
 435         config.dev = tps->dev;
 436         config.driver_data = tps;
 437         config.regmap = tps->regmap;
 438
 439         /*
 440          * Switch case defines different possible multi phase config
 441          * This is based on dts buck node name.
 442          * Buck node name must be chosen accordingly.
 443          * Default case is no Multiphase buck.
 444          * In case of Multiphase configuration, value should be defined for
 445          * buck_configured to avoid creating bucks for every buck in multiphase
 446          */
 447         for (multi = MULTI_FIRST; multi < MULTI_NUM; multi++) {
 448                 np = of_find_node_by_name(tps->dev->of_node, multiphases[multi]);
 449                 npname = of_node_full_name(np);
 450                 np_pmic_parent = of_get_parent(of_get_parent(np));
 451                 if (of_node_cmp(of_node_full_name(np_pmic_parent), tps->dev->of_node->full_name))
 452                         continue;
 453                 delta = strcmp(npname, multiphases[multi]);
 454                 if (!delta) {
 455                         switch (multi) {
 456                         case MULTI_BUCK12:
 457                                 buck_multi[0] = 1;
 458                                 buck_configured[0] = 1;
 459                                 buck_configured[1] = 1;
 460                                 break;
 461                         /* multiphase buck34 is supported only with buck12 */
 462                         case MULTI_BUCK12_34:
 463                                 buck_multi[0] = 1;
 464                                 buck_multi[1] = 1;
 465                                 buck_configured[0] = 1;
 466                                 buck_configured[1] = 1;
 467                                 buck_configured[2] = 1;
 468                                 buck_configured[3] = 1;
 469                                 break;
 470                         case MULTI_BUCK123:
 471                                 buck_multi[2] = 1;
 472                                 buck_configured[0] = 1;
 473                                 buck_configured[1] = 1;
 474                                 buck_configured[2] = 1;
 475                                 break;
 476                         case MULTI_BUCK1234:
 477                                 buck_multi[3] = 1;
 478                                 buck_configured[0] = 1;
 479                                 buck_configured[1] = 1;
 480                                 buck_configured[2] = 1;
 481                                 buck_configured[3] = 1;
 482                                 break;
 483                         }
 484                 }
 485         }
 486
 487         if (tps->chip_id == LP8764)
 488                 /* There is only 4 buck on LP8764 */
 489                 buck_configured[4] = 1;
 490
 491         irq_data = devm_kmalloc_array(tps->dev,
 492                                 REGS_INT_NB * sizeof(struct tps6594_regulator_irq_data),
 493                                 ARRAY_SIZE(tps6594_bucks_irq_types) +
 494                                 ARRAY_SIZE(tps6594_ldos_irq_types),
 495                                 GFP_KERNEL);
 496         if (!irq_data)
 497                 return -ENOMEM;
 498
 499         for (i = 0; i < MULTI_PHASE_NB; i++) {
 500                 if (buck_multi[i] == 0)
 501                         continue;
 502
 503                 rdev = devm_regulator_register(&pdev->dev, &multi_regs[i], &config);
 504                 if (IS_ERR(rdev))
 505                         return dev_err_probe(tps->dev, PTR_ERR(rdev),
 506                                              "failed to register %s regulator\n",
 507                                              pdev->name);
 508
 509                 /* config multiphase buck12+buck34 */
 510                 if (i == 1)
 511                         buck_idx = 2;
 512                 error = tps6594_request_reg_irqs(pdev, rdev, irq_data,
 513                                                  tps6594_bucks_irq_types[buck_idx], &irq_idx);
 514                 if (error)
 515                         return error;
 516                 error = tps6594_request_reg_irqs(pdev, rdev, irq_data,
 517                                                  tps6594_bucks_irq_types[buck_idx + 1], &irq_idx);
 518                 if (error)
 519                         return error;
 520
 521                 if (i == 2 || i == 3) {
 522                         error = tps6594_request_reg_irqs(pdev, rdev, irq_data,
 523                                                          tps6594_bucks_irq_types[buck_idx + 2],
 524                                                          &irq_idx);
 525                         if (error)
 526                                 return error;
 527                 }
 528                 if (i == 3) {
 529                         error = tps6594_request_reg_irqs(pdev, rdev, irq_data,
 530                                                          tps6594_bucks_irq_types[buck_idx + 3],
 531                                                          &irq_idx);
 532                         if (error)
 533                                 return error;
 534                 }
 535         }
 536
 537         for (i = 0; i < BUCK_NB; i++) {
 538                 if (buck_configured[i] == 1)
 539                         continue;
 540
 541                 rdev = devm_regulator_register(&pdev->dev, &buck_regs[i], &config);
 542                 if (IS_ERR(rdev))
 543                         return dev_err_probe(tps->dev, PTR_ERR(rdev),
 544                                              "failed to register %s regulator\n",
 545                                              pdev->name);
 546
 547                 error = tps6594_request_reg_irqs(pdev, rdev, irq_data,
 548                                                  tps6594_bucks_irq_types[i], &irq_idx);
 549                 if (error)
 550                         return error;
 551         }
 552
 553         /* LP8764 dosen't have LDO */
 554         if (tps->chip_id != LP8764) {
 555                 for (i = 0; i < ARRAY_SIZE(ldo_regs); i++) {
 556                         rdev = devm_regulator_register(&pdev->dev, &ldo_regs[i], &config);
 557                         if (IS_ERR(rdev))
 558                                 return dev_err_probe(tps->dev, PTR_ERR(rdev),
 559                                                      "failed to register %s regulator\n",
 560                                                      pdev->name);
 561
 562                         error = tps6594_request_reg_irqs(pdev, rdev, irq_data,
 563                                                          tps6594_ldos_irq_types[i],
 564                                                          &irq_idx);
 565                         if (error)
 566                                 return error;
 567                 }
 568         }
 569
 570         if (tps->chip_id == LP8764)
 571                 ext_reg_irq_nb = ARRAY_SIZE(tps6594_ext_regulator_irq_types);
 572
 573         irq_ext_reg_data = devm_kmalloc_array(tps->dev,
 574                                         ext_reg_irq_nb,
 575                                         sizeof(struct tps6594_ext_regulator_irq_data),
 576                                         GFP_KERNEL);
 577         if (!irq_ext_reg_data)
 578                 return -ENOMEM;
 579
 580         for (i = 0; i < ext_reg_irq_nb; ++i) {
 581                 irq_type = &tps6594_ext_regulator_irq_types[i];
 582
 583                 irq = platform_get_irq_byname(pdev, irq_type->irq_name);
 584                 if (irq < 0)
 585                         return -EINVAL;
 586
 587                 irq_ext_reg_data[i].dev = tps->dev;
 588                 irq_ext_reg_data[i].type = irq_type;
 589
 590                 error = devm_request_threaded_irq(tps->dev, irq, NULL,
 591                                                   tps6594_regulator_irq_handler,
 592                                                   IRQF_ONESHOT,
 593                                                   irq_type->irq_name,
 594                                                   &irq_ext_reg_data[i]);
 595                 if (error)
 596                         return dev_err_probe(tps->dev, error,
 597                                              "failed to request %s IRQ %d\n",
 598                                              irq_type->irq_name, irq);
 599         }
 600         return 0;
 601 }
 602
 603 static struct platform_driver tps6594_regulator_driver = {
 604         .driver = {
 605                 .name = "tps6594-regulator",
 606         },
 607         .probe = tps6594_regulator_probe,
 608 };
 609
 610 module_platform_driver(tps6594_regulator_driver);
 611
 612 MODULE_ALIAS("platform:tps6594-regulator");
 613 MODULE_AUTHOR("Jerome Neanne <jneanne@baylibre.com>");
 614 MODULE_DESCRIPTION("TPS6594 voltage regulator driver");
 615 MODULE_LICENSE("GPL");