drivers/regulator/stpmic1_regulator.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (C) STMicroelectronics 2018
   3 // Author: Pascal Paillet <p.paillet@st.com> for STMicroelectronics.
   4
   5 #include <linux/interrupt.h>
   6 #include <linux/mfd/stpmic1.h>
   7 #include <linux/module.h>
   8 #include <linux/of_irq.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/regmap.h>
  11 #include <linux/regulator/driver.h>
  12 #include <linux/regulator/machine.h>
  13 #include <linux/regulator/of_regulator.h>
  14
  15 #include <dt-bindings/mfd/st,stpmic1.h>
  16
  17 /**
  18  * stpmic1 regulator description: this structure is used as driver data
  19  * @desc: regulator framework description
  20  * @mask_reset_reg: mask reset register address
  21  * @mask_reset_mask: mask rank and mask reset register mask
  22  * @icc_reg: icc register address
  23  * @icc_mask: icc register mask
  24  */
  25 struct stpmic1_regulator_cfg {
  26         struct regulator_desc desc;
  27         u8 mask_reset_reg;
  28         u8 mask_reset_mask;
  29         u8 icc_reg;
  30         u8 icc_mask;
  31 };
  32
  33 static int stpmic1_set_mode(struct regulator_dev *rdev, unsigned int mode);
  34 static unsigned int stpmic1_get_mode(struct regulator_dev *rdev);
  35 static int stpmic1_set_icc(struct regulator_dev *rdev);
  36 static unsigned int stpmic1_map_mode(unsigned int mode);
  37
  38 enum {
  39         STPMIC1_BUCK1 = 0,
  40         STPMIC1_BUCK2 = 1,
  41         STPMIC1_BUCK3 = 2,
  42         STPMIC1_BUCK4 = 3,
  43         STPMIC1_LDO1 = 4,
  44         STPMIC1_LDO2 = 5,
  45         STPMIC1_LDO3 = 6,
  46         STPMIC1_LDO4 = 7,
  47         STPMIC1_LDO5 = 8,
  48         STPMIC1_LDO6 = 9,
  49         STPMIC1_VREF_DDR = 10,
  50         STPMIC1_BOOST = 11,
  51         STPMIC1_VBUS_OTG = 12,
  52         STPMIC1_SW_OUT = 13,
  53 };
  54
  55 /* Enable time worst case is 5000mV/(2250uV/uS) */
  56 #define PMIC_ENABLE_TIME_US 2200
  57 /* Ramp delay worst case is (2250uV/uS) */
  58 #define PMIC_RAMP_DELAY 2200
  59
  60 static const struct regulator_linear_range buck1_ranges[] = {
  61         REGULATOR_LINEAR_RANGE(725000, 0, 4, 0),
  62         REGULATOR_LINEAR_RANGE(725000, 5, 36, 25000),
  63         REGULATOR_LINEAR_RANGE(1500000, 37, 63, 0),
  64 };
  65
  66 static const struct regulator_linear_range buck2_ranges[] = {
  67         REGULATOR_LINEAR_RANGE(1000000, 0, 17, 0),
  68         REGULATOR_LINEAR_RANGE(1050000, 18, 19, 0),
  69         REGULATOR_LINEAR_RANGE(1100000, 20, 21, 0),
  70         REGULATOR_LINEAR_RANGE(1150000, 22, 23, 0),
  71         REGULATOR_LINEAR_RANGE(1200000, 24, 25, 0),
  72         REGULATOR_LINEAR_RANGE(1250000, 26, 27, 0),
  73         REGULATOR_LINEAR_RANGE(1300000, 28, 29, 0),
  74         REGULATOR_LINEAR_RANGE(1350000, 30, 31, 0),
  75         REGULATOR_LINEAR_RANGE(1400000, 32, 33, 0),
  76         REGULATOR_LINEAR_RANGE(1450000, 34, 35, 0),
  77         REGULATOR_LINEAR_RANGE(1500000, 36, 63, 0),
  78 };
  79
  80 static const struct regulator_linear_range buck3_ranges[] = {
  81         REGULATOR_LINEAR_RANGE(1000000, 0, 19, 0),
  82         REGULATOR_LINEAR_RANGE(1100000, 20, 23, 0),
  83         REGULATOR_LINEAR_RANGE(1200000, 24, 27, 0),
  84         REGULATOR_LINEAR_RANGE(1300000, 28, 31, 0),
  85         REGULATOR_LINEAR_RANGE(1400000, 32, 35, 0),
  86         REGULATOR_LINEAR_RANGE(1500000, 36, 55, 100000),
  87         REGULATOR_LINEAR_RANGE(3400000, 56, 63, 0),
  88 };
  89
  90 static const struct regulator_linear_range buck4_ranges[] = {
  91         REGULATOR_LINEAR_RANGE(600000, 0, 27, 25000),
  92         REGULATOR_LINEAR_RANGE(1300000, 28, 29, 0),
  93         REGULATOR_LINEAR_RANGE(1350000, 30, 31, 0),
  94         REGULATOR_LINEAR_RANGE(1400000, 32, 33, 0),
  95         REGULATOR_LINEAR_RANGE(1450000, 34, 35, 0),
  96         REGULATOR_LINEAR_RANGE(1500000, 36, 60, 100000),
  97         REGULATOR_LINEAR_RANGE(3900000, 61, 63, 0),
  98 };
  99
 100 static const struct regulator_linear_range ldo1_ranges[] = {
 101         REGULATOR_LINEAR_RANGE(1700000, 0, 7, 0),
 102         REGULATOR_LINEAR_RANGE(1700000, 8, 24, 100000),
 103         REGULATOR_LINEAR_RANGE(3300000, 25, 31, 0),
 104 };
 105
 106 static const struct regulator_linear_range ldo2_ranges[] = {
 107         REGULATOR_LINEAR_RANGE(1700000, 0, 7, 0),
 108         REGULATOR_LINEAR_RANGE(1700000, 8, 24, 100000),
 109         REGULATOR_LINEAR_RANGE(3300000, 25, 30, 0),
 110 };
 111
 112 static const struct regulator_linear_range ldo3_ranges[] = {
 113         REGULATOR_LINEAR_RANGE(1700000, 0, 7, 0),
 114         REGULATOR_LINEAR_RANGE(1700000, 8, 24, 100000),
 115         REGULATOR_LINEAR_RANGE(3300000, 25, 30, 0),
 116         /* with index 31 LDO3 is in DDR mode */
 117         REGULATOR_LINEAR_RANGE(500000, 31, 31, 0),
 118 };
 119
 120 static const struct regulator_linear_range ldo5_ranges[] = {
 121         REGULATOR_LINEAR_RANGE(1700000, 0, 7, 0),
 122         REGULATOR_LINEAR_RANGE(1700000, 8, 30, 100000),
 123         REGULATOR_LINEAR_RANGE(3900000, 31, 31, 0),
 124 };
 125
 126 static const struct regulator_linear_range ldo6_ranges[] = {
 127         REGULATOR_LINEAR_RANGE(900000, 0, 24, 100000),
 128         REGULATOR_LINEAR_RANGE(3300000, 25, 31, 0),
 129 };
 130
 131 static const struct regulator_ops stpmic1_ldo_ops = {
 132         .list_voltage = regulator_list_voltage_linear_range,
 133         .map_voltage = regulator_map_voltage_linear_range,
 134         .is_enabled = regulator_is_enabled_regmap,
 135         .enable = regulator_enable_regmap,
 136         .disable = regulator_disable_regmap,
 137         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 138         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 139         .set_over_current_protection = stpmic1_set_icc,
 140 };
 141
 142 static const struct regulator_ops stpmic1_ldo3_ops = {
 143         .list_voltage = regulator_list_voltage_linear_range,
 144         .map_voltage = regulator_map_voltage_iterate,
 145         .is_enabled = regulator_is_enabled_regmap,
 146         .enable = regulator_enable_regmap,
 147         .disable = regulator_disable_regmap,
 148         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 149         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 150         .get_bypass = regulator_get_bypass_regmap,
 151         .set_bypass = regulator_set_bypass_regmap,
 152         .set_over_current_protection = stpmic1_set_icc,
 153 };
 154
 155 static const struct regulator_ops stpmic1_ldo4_fixed_regul_ops = {
 156         .is_enabled = regulator_is_enabled_regmap,
 157         .enable = regulator_enable_regmap,
 158         .disable = regulator_disable_regmap,
 159         .set_over_current_protection = stpmic1_set_icc,
 160 };
 161
 162 static const struct regulator_ops stpmic1_buck_ops = {
 163         .list_voltage = regulator_list_voltage_linear_range,
 164         .map_voltage = regulator_map_voltage_linear_range,
 165         .is_enabled = regulator_is_enabled_regmap,
 166         .enable = regulator_enable_regmap,
 167         .disable = regulator_disable_regmap,
 168         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 169         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 170         .set_pull_down = regulator_set_pull_down_regmap,
 171         .set_mode = stpmic1_set_mode,
 172         .get_mode = stpmic1_get_mode,
 173         .set_over_current_protection = stpmic1_set_icc,
 174 };
 175
 176 static const struct regulator_ops stpmic1_vref_ddr_ops = {
 177         .is_enabled = regulator_is_enabled_regmap,
 178         .enable = regulator_enable_regmap,
 179         .disable = regulator_disable_regmap,
 180 };
 181
 182 static const struct regulator_ops stpmic1_boost_regul_ops = {
 183         .is_enabled = regulator_is_enabled_regmap,
 184         .enable = regulator_enable_regmap,
 185         .disable = regulator_disable_regmap,
 186         .set_over_current_protection = stpmic1_set_icc,
 187 };
 188
 189 static const struct regulator_ops stpmic1_switch_regul_ops = {
 190         .is_enabled = regulator_is_enabled_regmap,
 191         .enable = regulator_enable_regmap,
 192         .disable = regulator_disable_regmap,
 193         .set_over_current_protection = stpmic1_set_icc,
 194         .set_active_discharge = regulator_set_active_discharge_regmap,
 195 };
 196
 197 #define REG_LDO(ids, base) { \
 198         .name = #ids, \
 199         .id = STPMIC1_##ids, \
 200         .n_voltages = 32, \
 201         .ops = &stpmic1_ldo_ops, \
 202         .linear_ranges = base ## _ranges, \
 203         .n_linear_ranges = ARRAY_SIZE(base ## _ranges), \
 204         .type = REGULATOR_VOLTAGE, \
 205         .owner = THIS_MODULE, \
 206         .vsel_reg = ids##_ACTIVE_CR, \
 207         .vsel_mask = LDO_VOLTAGE_MASK, \
 208         .enable_reg = ids##_ACTIVE_CR, \
 209         .enable_mask = LDO_ENABLE_MASK, \
 210         .enable_val = 1, \
 211         .disable_val = 0, \
 212         .enable_time = PMIC_ENABLE_TIME_US, \
 213         .ramp_delay = PMIC_RAMP_DELAY, \
 214         .supply_name = #base, \
 215 }
 216
 217 #define REG_LDO3(ids, base) { \
 218         .name = #ids, \
 219         .id = STPMIC1_##ids, \
 220         .n_voltages = 32, \
 221         .ops = &stpmic1_ldo3_ops, \
 222         .linear_ranges = ldo3_ranges, \
 223         .n_linear_ranges = ARRAY_SIZE(ldo3_ranges), \
 224         .type = REGULATOR_VOLTAGE, \
 225         .owner = THIS_MODULE, \
 226         .vsel_reg = LDO3_ACTIVE_CR, \
 227         .vsel_mask = LDO_VOLTAGE_MASK, \
 228         .enable_reg = LDO3_ACTIVE_CR, \
 229         .enable_mask = LDO_ENABLE_MASK, \
 230         .enable_val = 1, \
 231         .disable_val = 0, \
 232         .enable_time = PMIC_ENABLE_TIME_US, \
 233         .ramp_delay = PMIC_RAMP_DELAY, \
 234         .bypass_reg = LDO3_ACTIVE_CR, \
 235         .bypass_mask = LDO_BYPASS_MASK, \
 236         .bypass_val_on = LDO_BYPASS_MASK, \
 237         .bypass_val_off = 0, \
 238         .supply_name = #base, \
 239 }
 240
 241 #define REG_LDO4(ids, base) { \
 242         .name = #ids, \
 243         .id = STPMIC1_##ids, \
 244         .n_voltages = 1, \
 245         .ops = &stpmic1_ldo4_fixed_regul_ops, \
 246         .type = REGULATOR_VOLTAGE, \
 247         .owner = THIS_MODULE, \
 248         .min_uV = 3300000, \
 249         .fixed_uV = 3300000, \
 250         .enable_reg = LDO4_ACTIVE_CR, \
 251         .enable_mask = LDO_ENABLE_MASK, \
 252         .enable_val = 1, \
 253         .disable_val = 0, \
 254         .enable_time = PMIC_ENABLE_TIME_US, \
 255         .ramp_delay = PMIC_RAMP_DELAY, \
 256         .supply_name = #base, \
 257 }
 258
 259 #define REG_BUCK(ids, base) { \
 260         .name = #ids, \
 261         .id = STPMIC1_##ids, \
 262         .ops = &stpmic1_buck_ops, \
 263         .n_voltages = 64, \
 264         .linear_ranges = base ## _ranges, \
 265         .n_linear_ranges = ARRAY_SIZE(base ## _ranges), \
 266         .type = REGULATOR_VOLTAGE, \
 267         .owner = THIS_MODULE, \
 268         .vsel_reg = ids##_ACTIVE_CR, \
 269         .vsel_mask = BUCK_VOLTAGE_MASK, \
 270         .enable_reg = ids##_ACTIVE_CR, \
 271         .enable_mask = BUCK_ENABLE_MASK, \
 272         .enable_val = 1, \
 273         .disable_val = 0, \
 274         .enable_time = PMIC_ENABLE_TIME_US, \
 275         .ramp_delay = PMIC_RAMP_DELAY, \
 276         .of_map_mode = stpmic1_map_mode, \
 277         .pull_down_reg = ids##_PULL_DOWN_REG, \
 278         .pull_down_mask = ids##_PULL_DOWN_MASK, \
 279         .supply_name = #base, \
 280 }
 281
 282 #define REG_VREF_DDR(ids, base) { \
 283         .name = #ids, \
 284         .id = STPMIC1_##ids, \
 285         .n_voltages = 1, \
 286         .ops = &stpmic1_vref_ddr_ops, \
 287         .type = REGULATOR_VOLTAGE, \
 288         .owner = THIS_MODULE, \
 289         .min_uV = 500000, \
 290         .fixed_uV = 500000, \
 291         .enable_reg = VREF_DDR_ACTIVE_CR, \
 292         .enable_mask = BUCK_ENABLE_MASK, \
 293         .enable_val = 1, \
 294         .disable_val = 0, \
 295         .enable_time = PMIC_ENABLE_TIME_US, \
 296         .supply_name = #base, \
 297 }
 298
 299 #define REG_BOOST(ids, base) { \
 300         .name = #ids, \
 301         .id = STPMIC1_##ids, \
 302         .n_voltages = 1, \
 303         .ops = &stpmic1_boost_regul_ops, \
 304         .type = REGULATOR_VOLTAGE, \
 305         .owner = THIS_MODULE, \
 306         .min_uV = 0, \
 307         .fixed_uV = 5000000, \
 308         .enable_reg = BST_SW_CR, \
 309         .enable_mask = BOOST_ENABLED, \
 310         .enable_val = BOOST_ENABLED, \
 311         .disable_val = 0, \
 312         .enable_time = PMIC_ENABLE_TIME_US, \
 313         .supply_name = #base, \
 314 }
 315
 316 #define REG_VBUS_OTG(ids, base) { \
 317         .name = #ids, \
 318         .id = STPMIC1_##ids, \
 319         .n_voltages = 1, \
 320         .ops = &stpmic1_switch_regul_ops, \
 321         .type = REGULATOR_VOLTAGE, \
 322         .owner = THIS_MODULE, \
 323         .min_uV = 0, \
 324         .fixed_uV = 5000000, \
 325         .enable_reg = BST_SW_CR, \
 326         .enable_mask = USBSW_OTG_SWITCH_ENABLED, \
 327         .enable_val = USBSW_OTG_SWITCH_ENABLED, \
 328         .disable_val = 0, \
 329         .enable_time = PMIC_ENABLE_TIME_US, \
 330         .supply_name = #base, \
 331         .active_discharge_reg = BST_SW_CR, \
 332         .active_discharge_mask = VBUS_OTG_DISCHARGE, \
 333         .active_discharge_on = VBUS_OTG_DISCHARGE, \
 334 }
 335
 336 #define REG_SW_OUT(ids, base) { \
 337         .name = #ids, \
 338         .id = STPMIC1_##ids, \
 339         .n_voltages = 1, \
 340         .ops = &stpmic1_switch_regul_ops, \
 341         .type = REGULATOR_VOLTAGE, \
 342         .owner = THIS_MODULE, \
 343         .min_uV = 0, \
 344         .fixed_uV = 5000000, \
 345         .enable_reg = BST_SW_CR, \
 346         .enable_mask = SWIN_SWOUT_ENABLED, \
 347         .enable_val = SWIN_SWOUT_ENABLED, \
 348         .disable_val = 0, \
 349         .enable_time = PMIC_ENABLE_TIME_US, \
 350         .supply_name = #base, \
 351         .active_discharge_reg = BST_SW_CR, \
 352         .active_discharge_mask = SW_OUT_DISCHARGE, \
 353         .active_discharge_on = SW_OUT_DISCHARGE, \
 354 }
 355
 356 static const struct stpmic1_regulator_cfg stpmic1_regulator_cfgs[] = {
 357         [STPMIC1_BUCK1] = {
 358                 .desc = REG_BUCK(BUCK1, buck1),
 359                 .icc_reg = BUCKS_ICCTO_CR,
 360                 .icc_mask = BIT(0),
 361                 .mask_reset_reg = BUCKS_MASK_RESET_CR,
 362                 .mask_reset_mask = BIT(0),
 363         },
 364         [STPMIC1_BUCK2] = {
 365                 .desc = REG_BUCK(BUCK2, buck2),
 366                 .icc_reg = BUCKS_ICCTO_CR,
 367                 .icc_mask = BIT(1),
 368                 .mask_reset_reg = BUCKS_MASK_RESET_CR,
 369                 .mask_reset_mask = BIT(1),
 370         },
 371         [STPMIC1_BUCK3] = {
 372                 .desc = REG_BUCK(BUCK3, buck3),
 373                 .icc_reg = BUCKS_ICCTO_CR,
 374                 .icc_mask = BIT(2),
 375                 .mask_reset_reg = BUCKS_MASK_RESET_CR,
 376                 .mask_reset_mask = BIT(2),
 377         },
 378         [STPMIC1_BUCK4] = {
 379                 .desc = REG_BUCK(BUCK4, buck4),
 380                 .icc_reg = BUCKS_ICCTO_CR,
 381                 .icc_mask = BIT(3),
 382                 .mask_reset_reg = BUCKS_MASK_RESET_CR,
 383                 .mask_reset_mask = BIT(3),
 384         },
 385         [STPMIC1_LDO1] = {
 386                 .desc = REG_LDO(LDO1, ldo1),
 387                 .icc_reg = LDOS_ICCTO_CR,
 388                 .icc_mask = BIT(0),
 389                 .mask_reset_reg = LDOS_MASK_RESET_CR,
 390                 .mask_reset_mask = BIT(0),
 391         },
 392         [STPMIC1_LDO2] = {
 393                 .desc = REG_LDO(LDO2, ldo2),
 394                 .icc_reg = LDOS_ICCTO_CR,
 395                 .icc_mask = BIT(1),
 396                 .mask_reset_reg = LDOS_MASK_RESET_CR,
 397                 .mask_reset_mask = BIT(1),
 398         },
 399         [STPMIC1_LDO3] = {
 400                 .desc = REG_LDO3(LDO3, ldo3),
 401                 .icc_reg = LDOS_ICCTO_CR,
 402                 .icc_mask = BIT(2),
 403                 .mask_reset_reg = LDOS_MASK_RESET_CR,
 404                 .mask_reset_mask = BIT(2),
 405         },
 406         [STPMIC1_LDO4] = {
 407                 .desc = REG_LDO4(LDO4, ldo4),
 408                 .icc_reg = LDOS_ICCTO_CR,
 409                 .icc_mask = BIT(3),
 410                 .mask_reset_reg = LDOS_MASK_RESET_CR,
 411                 .mask_reset_mask = BIT(3),
 412         },
 413         [STPMIC1_LDO5] = {
 414                 .desc = REG_LDO(LDO5, ldo5),
 415                 .icc_reg = LDOS_ICCTO_CR,
 416                 .icc_mask = BIT(4),
 417                 .mask_reset_reg = LDOS_MASK_RESET_CR,
 418                 .mask_reset_mask = BIT(4),
 419         },
 420         [STPMIC1_LDO6] = {
 421                 .desc = REG_LDO(LDO6, ldo6),
 422                 .icc_reg = LDOS_ICCTO_CR,
 423                 .icc_mask = BIT(5),
 424                 .mask_reset_reg = LDOS_MASK_RESET_CR,
 425                 .mask_reset_mask = BIT(5),
 426         },
 427         [STPMIC1_VREF_DDR] = {
 428                 .desc = REG_VREF_DDR(VREF_DDR, vref_ddr),
 429                 .mask_reset_reg = LDOS_MASK_RESET_CR,
 430                 .mask_reset_mask = BIT(6),
 431         },
 432         [STPMIC1_BOOST] = {
 433                 .desc = REG_BOOST(BOOST, boost),
 434                 .icc_reg = BUCKS_ICCTO_CR,
 435                 .icc_mask = BIT(6),
 436         },
 437         [STPMIC1_VBUS_OTG] = {
 438                 .desc = REG_VBUS_OTG(VBUS_OTG, pwr_sw1),
 439                 .icc_reg = BUCKS_ICCTO_CR,
 440                 .icc_mask = BIT(4),
 441         },
 442         [STPMIC1_SW_OUT] = {
 443                 .desc = REG_SW_OUT(SW_OUT, pwr_sw2),
 444                 .icc_reg = BUCKS_ICCTO_CR,
 445                 .icc_mask = BIT(5),
 446         },
 447 };
 448
 449 static unsigned int stpmic1_map_mode(unsigned int mode)
 450 {
 451         switch (mode) {
 452         case STPMIC1_BUCK_MODE_NORMAL:
 453                 return REGULATOR_MODE_NORMAL;
 454         case STPMIC1_BUCK_MODE_LP:
 455                 return REGULATOR_MODE_STANDBY;
 456         default:
 457                 return REGULATOR_MODE_INVALID;
 458         }
 459 }
 460
 461 static unsigned int stpmic1_get_mode(struct regulator_dev *rdev)
 462 {
 463         int value;
 464         struct regmap *regmap = rdev_get_regmap(rdev);
 465
 466         regmap_read(regmap, rdev->desc->enable_reg, &value);
 467
 468         if (value & STPMIC1_BUCK_MODE_LP)
 469                 return REGULATOR_MODE_STANDBY;
 470
 471         return REGULATOR_MODE_NORMAL;
 472 }
 473
 474 static int stpmic1_set_mode(struct regulator_dev *rdev, unsigned int mode)
 475 {
 476         int value;
 477         struct regmap *regmap = rdev_get_regmap(rdev);
 478
 479         switch (mode) {
 480         case REGULATOR_MODE_NORMAL:
 481                 value = STPMIC1_BUCK_MODE_NORMAL;
 482                 break;
 483         case REGULATOR_MODE_STANDBY:
 484                 value = STPMIC1_BUCK_MODE_LP;
 485                 break;
 486         default:
 487                 return -EINVAL;
 488         }
 489
 490         return regmap_update_bits(regmap, rdev->desc->enable_reg,
 491                                   STPMIC1_BUCK_MODE_LP, value);
 492 }
 493
 494 static int stpmic1_set_icc(struct regulator_dev *rdev)
 495 {
 496         struct stpmic1_regulator_cfg *cfg = rdev_get_drvdata(rdev);
 497         struct regmap *regmap = rdev_get_regmap(rdev);
 498
 499         /* enable switch off in case of over current */
 500         return regmap_update_bits(regmap, cfg->icc_reg, cfg->icc_mask,
 501                                   cfg->icc_mask);
 502 }
 503
 504 static irqreturn_t stpmic1_curlim_irq_handler(int irq, void *data)
 505 {
 506         struct regulator_dev *rdev = (struct regulator_dev *)data;
 507
 508         regulator_lock(rdev);
 509
 510         /* Send an overcurrent notification */
 511         regulator_notifier_call_chain(rdev,
 512                                       REGULATOR_EVENT_OVER_CURRENT,
 513                                       NULL);
 514
 515         regulator_unlock(rdev);
 516
 517         return IRQ_HANDLED;
 518 }
 519
 520 #define MATCH(_name, _id) \
 521         [STPMIC1_##_id] = { \
 522                 .name = #_name, \
 523                 .desc = &stpmic1_regulator_cfgs[STPMIC1_##_id].desc, \
 524         }
 525
 526 static struct of_regulator_match stpmic1_matches[] = {
 527         MATCH(buck1, BUCK1),
 528         MATCH(buck2, BUCK2),
 529         MATCH(buck3, BUCK3),
 530         MATCH(buck4, BUCK4),
 531         MATCH(ldo1, LDO1),
 532         MATCH(ldo2, LDO2),
 533         MATCH(ldo3, LDO3),
 534         MATCH(ldo4, LDO4),
 535         MATCH(ldo5, LDO5),
 536         MATCH(ldo6, LDO6),
 537         MATCH(vref_ddr, VREF_DDR),
 538         MATCH(boost, BOOST),
 539         MATCH(pwr_sw1, VBUS_OTG),
 540         MATCH(pwr_sw2, SW_OUT),
 541 };
 542
 543 static int stpmic1_regulator_register(struct platform_device *pdev, int id,
 544                                       struct of_regulator_match *match,
 545                                       const struct stpmic1_regulator_cfg *cfg)
 546 {
 547         struct stpmic1 *pmic_dev = dev_get_drvdata(pdev->dev.parent);
 548         struct regulator_dev *rdev;
 549         struct regulator_config config = {};
 550         int ret = 0;
 551         int irq;
 552
 553         config.dev = &pdev->dev;
 554         config.init_data = match->init_data;
 555         config.of_node = match->of_node;
 556         config.regmap = pmic_dev->regmap;
 557         config.driver_data = (void *)cfg;
 558
 559         rdev = devm_regulator_register(&pdev->dev, &cfg->desc, &config);
 560         if (IS_ERR(rdev)) {
 561                 dev_err(&pdev->dev, "failed to register %s regulator\n",
 562                         cfg->desc.name);
 563                 return PTR_ERR(rdev);
 564         }
 565
 566         /* set mask reset */
 567         if (of_get_property(config.of_node, "st,mask-reset", NULL) &&
 568             cfg->mask_reset_reg != 0) {
 569                 ret = regmap_update_bits(pmic_dev->regmap,
 570                                          cfg->mask_reset_reg,
 571                                          cfg->mask_reset_mask,
 572                                          cfg->mask_reset_mask);
 573                 if (ret) {
 574                         dev_err(&pdev->dev, "set mask reset failed\n");
 575                         return ret;
 576                 }
 577         }
 578
 579         /* setup an irq handler for over-current detection */
 580         irq = of_irq_get(config.of_node, 0);
 581         if (irq > 0) {
 582                 ret = devm_request_threaded_irq(&pdev->dev,
 583                                                 irq, NULL,
 584                                                 stpmic1_curlim_irq_handler,
 585                                                 IRQF_ONESHOT | IRQF_SHARED,
 586                                                 pdev->name, rdev);
 587                 if (ret) {
 588                         dev_err(&pdev->dev, "Request IRQ failed\n");
 589                         return ret;
 590                 }
 591         }
 592         return 0;
 593 }
 594
 595 static int stpmic1_regulator_probe(struct platform_device *pdev)
 596 {
 597         int i, ret;
 598
 599         ret = of_regulator_match(&pdev->dev, pdev->dev.of_node, stpmic1_matches,
 600                                  ARRAY_SIZE(stpmic1_matches));
 601         if (ret < 0) {
 602                 dev_err(&pdev->dev,
 603                         "Error in PMIC regulator device tree node");
 604                 return ret;
 605         }
 606
 607         for (i = 0; i < ARRAY_SIZE(stpmic1_regulator_cfgs); i++) {
 608                 ret = stpmic1_regulator_register(pdev, i, &stpmic1_matches[i],
 609                                                  &stpmic1_regulator_cfgs[i]);
 610                 if (ret < 0)
 611                         return ret;
 612         }
 613
 614         dev_dbg(&pdev->dev, "stpmic1_regulator driver probed\n");
 615
 616         return 0;
 617 }
 618
 619 static const struct of_device_id of_pmic_regulator_match[] = {
 620         { .compatible = "st,stpmic1-regulators" },
 621         { },
 622 };
 623
 624 MODULE_DEVICE_TABLE(of, of_pmic_regulator_match);
 625
 626 static struct platform_driver stpmic1_regulator_driver = {
 627         .driver = {
 628                 .name = "stpmic1-regulator",
 629                 .of_match_table = of_match_ptr(of_pmic_regulator_match),
 630         },
 631         .probe = stpmic1_regulator_probe,
 632 };
 633
 634 module_platform_driver(stpmic1_regulator_driver);
 635
 636 MODULE_DESCRIPTION("STPMIC1 PMIC voltage regulator driver");
 637 MODULE_AUTHOR("Pascal Paillet <p.paillet@st.com>");
 638 MODULE_LICENSE("GPL v2");