drivers/regulator/tps80031-regulator.c

   1 /*
   2  * tps80031-regulator.c -- TI TPS80031 regulator driver.
   3  *
   4  * Regulator driver for TI TPS80031/TPS80032 Fully Integrated Power
   5  * Management with Power Path and Battery Charger.
   6  *
   7  * Copyright (c) 2012, NVIDIA Corporation.
   8  *
   9  * Author: Laxman Dewangan <ldewangan@nvidia.com>
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License as
  13  * published by the Free Software Foundation version 2.
  14  *
  15  * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
  16  * whether express or implied; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  23  * 02111-1307, USA
  24  */
  25
  26 #include <linux/delay.h>
  27 #include <linux/err.h>
  28 #include <linux/init.h>
  29 #include <linux/kernel.h>
  30 #include <linux/mfd/tps80031.h>
  31 #include <linux/module.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/regulator/driver.h>
  34 #include <linux/regulator/machine.h>
  35 #include <linux/slab.h>
  36
  37 /* Flags for DCDC Voltage reading */
  38 #define DCDC_OFFSET_EN          BIT(0)
  39 #define DCDC_EXTENDED_EN        BIT(1)
  40 #define TRACK_MODE_ENABLE       BIT(2)
  41
  42 #define SMPS_MULTOFFSET_VIO     BIT(1)
  43 #define SMPS_MULTOFFSET_SMPS1   BIT(3)
  44 #define SMPS_MULTOFFSET_SMPS2   BIT(4)
  45 #define SMPS_MULTOFFSET_SMPS3   BIT(6)
  46 #define SMPS_MULTOFFSET_SMPS4   BIT(0)
  47
  48 #define SMPS_CMD_MASK           0xC0
  49 #define SMPS_VSEL_MASK          0x3F
  50 #define LDO_VSEL_MASK           0x1F
  51 #define LDO_TRACK_VSEL_MASK     0x3F
  52
  53 #define MISC2_LDOUSB_IN_VSYS    BIT(4)
  54 #define MISC2_LDOUSB_IN_PMID    BIT(3)
  55 #define MISC2_LDOUSB_IN_MASK    0x18
  56
  57 #define MISC2_LDO3_SEL_VIB_VAL  BIT(0)
  58 #define MISC2_LDO3_SEL_VIB_MASK 0x1
  59
  60 #define BOOST_HW_PWR_EN         BIT(5)
  61 #define BOOST_HW_PWR_EN_MASK    BIT(5)
  62
  63 #define OPA_MODE_EN             BIT(6)
  64 #define OPA_MODE_EN_MASK        BIT(6)
  65
  66 #define USB_VBUS_CTRL_SET       0x04
  67 #define USB_VBUS_CTRL_CLR       0x05
  68 #define VBUS_DISCHRG            0x20
  69
  70 struct tps80031_regulator_info {
  71         /* Regulator register address.*/
  72         u8              trans_reg;
  73         u8              state_reg;
  74         u8              force_reg;
  75         u8              volt_reg;
  76         u8              volt_id;
  77
  78         /*Power request bits */
  79         int             preq_bit;
  80
  81         /* used by regulator core */
  82         struct regulator_desc   desc;
  83
  84 };
  85
  86 struct tps80031_regulator {
  87         struct device                   *dev;
  88         struct regulator_dev            *rdev;
  89         struct tps80031_regulator_info  *rinfo;
  90
  91         u8                              device_flags;
  92         unsigned int                    config_flags;
  93         unsigned int                    ext_ctrl_flag;
  94 };
  95
  96 static inline struct device *to_tps80031_dev(struct regulator_dev *rdev)
  97 {
  98         return rdev_get_dev(rdev)->parent->parent;
  99 }
 100
 101 static int tps80031_reg_is_enabled(struct regulator_dev *rdev)
 102 {
 103         struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
 104         struct device *parent = to_tps80031_dev(rdev);
 105         u8 reg_val;
 106         int ret;
 107
 108         if (ri->ext_ctrl_flag & TPS80031_EXT_PWR_REQ)
 109                 return true;
 110
 111         ret = tps80031_read(parent, TPS80031_SLAVE_ID1, ri->rinfo->state_reg,
 112                                 &reg_val);
 113         if (ret < 0) {
 114                 dev_err(&rdev->dev, "Reg 0x%02x read failed, err = %d\n",
 115                         ri->rinfo->state_reg, ret);
 116                 return ret;
 117         }
 118         return (reg_val & TPS80031_STATE_MASK) == TPS80031_STATE_ON;
 119 }
 120
 121 static int tps80031_reg_enable(struct regulator_dev *rdev)
 122 {
 123         struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
 124         struct device *parent = to_tps80031_dev(rdev);
 125         int ret;
 126
 127         if (ri->ext_ctrl_flag & TPS80031_EXT_PWR_REQ)
 128                 return 0;
 129
 130         ret = tps80031_update(parent, TPS80031_SLAVE_ID1, ri->rinfo->state_reg,
 131                         TPS80031_STATE_ON, TPS80031_STATE_MASK);
 132         if (ret < 0) {
 133                 dev_err(&rdev->dev, "Reg 0x%02x update failed, err = %d\n",
 134                         ri->rinfo->state_reg, ret);
 135                 return ret;
 136         }
 137         return ret;
 138 }
 139
 140 static int tps80031_reg_disable(struct regulator_dev *rdev)
 141 {
 142         struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
 143         struct device *parent = to_tps80031_dev(rdev);
 144         int ret;
 145
 146         if (ri->ext_ctrl_flag & TPS80031_EXT_PWR_REQ)
 147                 return 0;
 148
 149         ret = tps80031_update(parent, TPS80031_SLAVE_ID1, ri->rinfo->state_reg,
 150                         TPS80031_STATE_OFF, TPS80031_STATE_MASK);
 151         if (ret < 0)
 152                 dev_err(&rdev->dev, "Reg 0x%02x update failed, err = %d\n",
 153                         ri->rinfo->state_reg, ret);
 154         return ret;
 155 }
 156
 157 /* DCDC voltages for the selector of 58 to 63 */
 158 static int tps80031_dcdc_voltages[4][5] = {
 159         { 1350, 1500, 1800, 1900, 2100},
 160         { 1350, 1500, 1800, 1900, 2100},
 161         { 2084, 2315, 2778, 2932, 3241},
 162         { 4167, 2315, 2778, 2932, 3241},
 163 };
 164
 165 static int tps80031_dcdc_list_voltage(struct regulator_dev *rdev, unsigned sel)
 166 {
 167         struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
 168         int volt_index = ri->device_flags & 0x3;
 169
 170         if (sel == 0)
 171                 return 0;
 172         else if (sel < 58)
 173                 return regulator_list_voltage_linear(rdev, sel - 1);
 174         else
 175                 return tps80031_dcdc_voltages[volt_index][sel - 58] * 1000;
 176 }
 177
 178 static int tps80031_dcdc_set_voltage_sel(struct regulator_dev *rdev,
 179                 unsigned vsel)
 180 {
 181         struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
 182         struct device *parent = to_tps80031_dev(rdev);
 183         int ret;
 184         u8 reg_val;
 185
 186         if (ri->rinfo->force_reg) {
 187                 ret = tps80031_read(parent, ri->rinfo->volt_id,
 188                                                 ri->rinfo->force_reg, &reg_val);
 189                 if (ret < 0) {
 190                         dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
 191                                 ri->rinfo->force_reg, ret);
 192                         return ret;
 193                 }
 194                 if (!(reg_val & SMPS_CMD_MASK)) {
 195                         ret = tps80031_update(parent, ri->rinfo->volt_id,
 196                                 ri->rinfo->force_reg, vsel, SMPS_VSEL_MASK);
 197                         if (ret < 0)
 198                                 dev_err(ri->dev,
 199                                         "reg 0x%02x update failed, e = %d\n",
 200                                         ri->rinfo->force_reg, ret);
 201                         return ret;
 202                 }
 203         }
 204         ret = tps80031_update(parent, ri->rinfo->volt_id,
 205                         ri->rinfo->volt_reg, vsel, SMPS_VSEL_MASK);
 206         if (ret < 0)
 207                 dev_err(ri->dev, "reg 0x%02x update failed, e = %d\n",
 208                         ri->rinfo->volt_reg, ret);
 209         return ret;
 210 }
 211
 212 static int tps80031_dcdc_get_voltage_sel(struct regulator_dev *rdev)
 213 {
 214         struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
 215         struct device *parent = to_tps80031_dev(rdev);
 216         uint8_t vsel = 0;
 217         int ret;
 218
 219         if (ri->rinfo->force_reg) {
 220                 ret = tps80031_read(parent, ri->rinfo->volt_id,
 221                                                 ri->rinfo->force_reg, &vsel);
 222                 if (ret < 0) {
 223                         dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
 224                                         ri->rinfo->force_reg, ret);
 225                         return ret;
 226                 }
 227
 228                 if (!(vsel & SMPS_CMD_MASK))
 229                         return vsel & SMPS_VSEL_MASK;
 230         }
 231         ret = tps80031_read(parent, ri->rinfo->volt_id,
 232                                 ri->rinfo->volt_reg, &vsel);
 233         if (ret < 0) {
 234                 dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
 235                         ri->rinfo->volt_reg, ret);
 236                 return ret;
 237         }
 238         return vsel & SMPS_VSEL_MASK;
 239 }
 240
 241 static int tps80031_ldo_list_voltage(struct regulator_dev *rdev,
 242                                      unsigned int sel)
 243 {
 244         struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
 245         struct device *parent = to_tps80031_dev(rdev);
 246
 247         /* Check for valid setting for TPS80031 or TPS80032-ES1.0 */
 248         if ((ri->rinfo->desc.id == TPS80031_REGULATOR_LDO2) &&
 249                         (ri->device_flags & TRACK_MODE_ENABLE)) {
 250                 unsigned nvsel = (sel) & 0x1F;
 251                 if (((tps80031_get_chip_info(parent) == TPS80031) ||
 252                         ((tps80031_get_chip_info(parent) == TPS80032) &&
 253                         (tps80031_get_pmu_version(parent) == 0x0))) &&
 254                         ((nvsel == 0x0) || (nvsel >= 0x19 && nvsel <= 0x1F))) {
 255                                 dev_err(ri->dev,
 256                                         "Invalid sel %d in track mode LDO2\n",
 257                                         nvsel);
 258                                 return -EINVAL;
 259                 }
 260         }
 261
 262         return regulator_list_voltage_linear(rdev, sel);
 263 }
 264
 265 static int tps80031_ldo_map_voltage(struct regulator_dev *rdev,
 266                                     int min_uV, int max_uV)
 267 {
 268         struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
 269         struct device *parent = to_tps80031_dev(rdev);
 270
 271         /* Check for valid setting for TPS80031 or TPS80032-ES1.0 */
 272         if ((ri->rinfo->desc.id == TPS80031_REGULATOR_LDO2) &&
 273                         (ri->device_flags & TRACK_MODE_ENABLE)) {
 274                 if (((tps80031_get_chip_info(parent) == TPS80031) ||
 275                         ((tps80031_get_chip_info(parent) == TPS80032) &&
 276                         (tps80031_get_pmu_version(parent) == 0x0)))) {
 277                         return regulator_map_voltage_iterate(rdev, min_uV,
 278                                                              max_uV);
 279                 }
 280         }
 281
 282         return regulator_map_voltage_linear(rdev, min_uV, max_uV);
 283 }
 284
 285 static int tps80031_vbus_is_enabled(struct regulator_dev *rdev)
 286 {
 287         struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
 288         struct device *parent = to_tps80031_dev(rdev);
 289         int ret = -EIO;
 290         uint8_t ctrl1 = 0;
 291         uint8_t ctrl3 = 0;
 292
 293         ret = tps80031_read(parent, TPS80031_SLAVE_ID2,
 294                         TPS80031_CHARGERUSB_CTRL1, &ctrl1);
 295         if (ret < 0) {
 296                 dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
 297                         TPS80031_CHARGERUSB_CTRL1, ret);
 298                 return ret;
 299         }
 300         ret = tps80031_read(parent, TPS80031_SLAVE_ID2,
 301                                 TPS80031_CHARGERUSB_CTRL3, &ctrl3);
 302         if (ret < 0) {
 303                 dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
 304                         TPS80031_CHARGERUSB_CTRL3, ret);
 305                 return ret;
 306         }
 307         if ((ctrl1 & OPA_MODE_EN) && (ctrl3 & BOOST_HW_PWR_EN))
 308                 return 1;
 309         return ret;
 310 }
 311
 312 static int tps80031_vbus_enable(struct regulator_dev *rdev)
 313 {
 314         struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
 315         struct device *parent = to_tps80031_dev(rdev);
 316         int ret;
 317
 318         ret = tps80031_set_bits(parent, TPS80031_SLAVE_ID2,
 319                                 TPS80031_CHARGERUSB_CTRL1, OPA_MODE_EN);
 320         if (ret < 0) {
 321                 dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
 322                                         TPS80031_CHARGERUSB_CTRL1, ret);
 323                 return ret;
 324         }
 325
 326         ret = tps80031_set_bits(parent, TPS80031_SLAVE_ID2,
 327                                 TPS80031_CHARGERUSB_CTRL3, BOOST_HW_PWR_EN);
 328         if (ret < 0) {
 329                 dev_err(ri->dev, "reg 0x%02x read failed, e = %d\n",
 330                         TPS80031_CHARGERUSB_CTRL3, ret);
 331                 return ret;
 332         }
 333         return ret;
 334 }
 335
 336 static int tps80031_vbus_disable(struct regulator_dev *rdev)
 337 {
 338         struct tps80031_regulator *ri = rdev_get_drvdata(rdev);
 339         struct device *parent = to_tps80031_dev(rdev);
 340         int ret = 0;
 341
 342         if (ri->config_flags & TPS80031_VBUS_DISCHRG_EN_PDN) {
 343                 ret = tps80031_write(parent, TPS80031_SLAVE_ID2,
 344                         USB_VBUS_CTRL_SET, VBUS_DISCHRG);
 345                 if (ret < 0) {
 346                         dev_err(ri->dev, "reg 0x%02x write failed, e = %d\n",
 347                                 USB_VBUS_CTRL_SET, ret);
 348                         return ret;
 349                 }
 350         }
 351
 352         ret = tps80031_clr_bits(parent, TPS80031_SLAVE_ID2,
 353                         TPS80031_CHARGERUSB_CTRL1,  OPA_MODE_EN);
 354         if (ret < 0) {
 355                 dev_err(ri->dev, "reg 0x%02x clearbit failed, e = %d\n",
 356                                 TPS80031_CHARGERUSB_CTRL1, ret);
 357                 return ret;
 358         }
 359
 360         ret = tps80031_clr_bits(parent, TPS80031_SLAVE_ID2,
 361                                 TPS80031_CHARGERUSB_CTRL3, BOOST_HW_PWR_EN);
 362         if (ret < 0) {
 363                 dev_err(ri->dev, "reg 0x%02x clearbit failed, e = %d\n",
 364                                 TPS80031_CHARGERUSB_CTRL3, ret);
 365                 return ret;
 366         }
 367
 368         mdelay(DIV_ROUND_UP(ri->rinfo->desc.enable_time, 1000));
 369         if (ri->config_flags & TPS80031_VBUS_DISCHRG_EN_PDN) {
 370                 ret = tps80031_write(parent, TPS80031_SLAVE_ID2,
 371                         USB_VBUS_CTRL_CLR, VBUS_DISCHRG);
 372                 if (ret < 0) {
 373                         dev_err(ri->dev, "reg 0x%02x write failed, e = %d\n",
 374                                         USB_VBUS_CTRL_CLR, ret);
 375                         return ret;
 376                 }
 377         }
 378         return ret;
 379 }
 380
 381 static struct regulator_ops tps80031_dcdc_ops = {
 382         .list_voltage           = tps80031_dcdc_list_voltage,
 383         .set_voltage_sel        = tps80031_dcdc_set_voltage_sel,
 384         .get_voltage_sel        = tps80031_dcdc_get_voltage_sel,
 385         .enable         = tps80031_reg_enable,
 386         .disable        = tps80031_reg_disable,
 387         .is_enabled     = tps80031_reg_is_enabled,
 388 };
 389
 390 static struct regulator_ops tps80031_ldo_ops = {
 391         .list_voltage           = tps80031_ldo_list_voltage,
 392         .map_voltage            = tps80031_ldo_map_voltage,
 393         .set_voltage_sel        = regulator_set_voltage_sel_regmap,
 394         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
 395         .enable                 = tps80031_reg_enable,
 396         .disable                = tps80031_reg_disable,
 397         .is_enabled             = tps80031_reg_is_enabled,
 398 };
 399
 400 static struct regulator_ops tps80031_vbus_sw_ops = {
 401         .list_voltage   = regulator_list_voltage_linear,
 402         .enable         = tps80031_vbus_enable,
 403         .disable        = tps80031_vbus_disable,
 404         .is_enabled     = tps80031_vbus_is_enabled,
 405 };
 406
 407 static struct regulator_ops tps80031_vbus_hw_ops = {
 408         .list_voltage   = regulator_list_voltage_linear,
 409 };
 410
 411 static struct regulator_ops tps80031_ext_reg_ops = {
 412         .list_voltage   = regulator_list_voltage_linear,
 413         .enable         = tps80031_reg_enable,
 414         .disable        = tps80031_reg_disable,
 415         .is_enabled     = tps80031_reg_is_enabled,
 416 };
 417
 418 /* Non-exiting default definition for some register */
 419 #define TPS80031_SMPS3_CFG_FORCE        0
 420 #define TPS80031_SMPS4_CFG_FORCE        0
 421
 422 #define TPS80031_VBUS_CFG_TRANS         0
 423 #define TPS80031_VBUS_CFG_STATE         0
 424
 425 #define TPS80031_REG_SMPS(_id, _volt_id, _pbit) \
 426 {                                                               \
 427         .trans_reg = TPS80031_##_id##_CFG_TRANS,                \
 428         .state_reg = TPS80031_##_id##_CFG_STATE,                \
 429         .force_reg = TPS80031_##_id##_CFG_FORCE,                \
 430         .volt_reg = TPS80031_##_id##_CFG_VOLTAGE,               \
 431         .volt_id = TPS80031_SLAVE_##_volt_id,                   \
 432         .preq_bit = _pbit,                                      \
 433         .desc = {                                               \
 434                 .name = "tps80031_"#_id,                        \
 435                 .id = TPS80031_REGULATOR_##_id,                 \
 436                 .n_voltages = 63,                               \
 437                 .ops = &tps80031_dcdc_ops,                      \
 438                 .type = REGULATOR_VOLTAGE,                      \
 439                 .owner = THIS_MODULE,                           \
 440                 .enable_time = 500,                             \
 441         },                                                      \
 442 }
 443
 444 #define TPS80031_REG_LDO(_id, _preq_bit)                        \
 445 {                                                               \
 446         .trans_reg = TPS80031_##_id##_CFG_TRANS,                \
 447         .state_reg = TPS80031_##_id##_CFG_STATE,                \
 448         .volt_reg = TPS80031_##_id##_CFG_VOLTAGE,               \
 449         .volt_id = TPS80031_SLAVE_ID1,                          \
 450         .preq_bit = _preq_bit,                                  \
 451         .desc = {                                               \
 452                 .owner = THIS_MODULE,                           \
 453                 .name = "tps80031_"#_id,                        \
 454                 .id = TPS80031_REGULATOR_##_id,                 \
 455                 .ops = &tps80031_ldo_ops,                       \
 456                 .type = REGULATOR_VOLTAGE,                      \
 457                 .min_uV = 1000000,                              \
 458                 .uV_step = 100000,                              \
 459                 .linear_min_sel = 1,                            \
 460                 .n_voltages = 25,                               \
 461                 .vsel_reg = TPS80031_##_id##_CFG_VOLTAGE,       \
 462                 .vsel_mask = LDO_VSEL_MASK,                     \
 463                 .enable_time = 500,                             \
 464         },                                                      \
 465 }
 466
 467 #define TPS80031_REG_FIXED(_id, max_mV, _ops, _delay, _pbit)    \
 468 {                                                               \
 469         .trans_reg = TPS80031_##_id##_CFG_TRANS,                \
 470         .state_reg = TPS80031_##_id##_CFG_STATE,                \
 471         .volt_id = TPS80031_SLAVE_ID1,                          \
 472         .preq_bit = _pbit,                                      \
 473         .desc = {                                               \
 474                 .name = "tps80031_"#_id,                        \
 475                 .id = TPS80031_REGULATOR_##_id,                 \
 476                 .min_uV = max_mV * 1000,                        \
 477                 .n_voltages = 1,                                \
 478                 .ops = &_ops,                                   \
 479                 .type = REGULATOR_VOLTAGE,                      \
 480                 .owner = THIS_MODULE,                           \
 481                 .enable_time = _delay,                          \
 482         },                                                      \
 483 }
 484
 485 static struct tps80031_regulator_info tps80031_rinfo[TPS80031_REGULATOR_MAX] = {
 486         TPS80031_REG_SMPS(VIO,   ID0, 4),
 487         TPS80031_REG_SMPS(SMPS1, ID0, 0),
 488         TPS80031_REG_SMPS(SMPS2, ID0, 1),
 489         TPS80031_REG_SMPS(SMPS3, ID1, 2),
 490         TPS80031_REG_SMPS(SMPS4, ID1, 3),
 491         TPS80031_REG_LDO(VANA,   -1),
 492         TPS80031_REG_LDO(LDO1,   8),
 493         TPS80031_REG_LDO(LDO2,   9),
 494         TPS80031_REG_LDO(LDO3,   10),
 495         TPS80031_REG_LDO(LDO4,   11),
 496         TPS80031_REG_LDO(LDO5,   12),
 497         TPS80031_REG_LDO(LDO6,   13),
 498         TPS80031_REG_LDO(LDO7,   14),
 499         TPS80031_REG_LDO(LDOLN,  15),
 500         TPS80031_REG_LDO(LDOUSB, 5),
 501         TPS80031_REG_FIXED(VBUS,   5000, tps80031_vbus_hw_ops, 100000, -1),
 502         TPS80031_REG_FIXED(REGEN1, 3300, tps80031_ext_reg_ops, 0, 16),
 503         TPS80031_REG_FIXED(REGEN2, 3300, tps80031_ext_reg_ops, 0, 17),
 504         TPS80031_REG_FIXED(SYSEN,  3300, tps80031_ext_reg_ops, 0, 18),
 505 };
 506
 507 static int tps80031_power_req_config(struct device *parent,
 508                 struct tps80031_regulator *ri,
 509                 struct tps80031_regulator_platform_data *tps80031_pdata)
 510 {
 511         int ret = 0;
 512
 513         if (ri->rinfo->preq_bit < 0)
 514                 goto skip_pwr_req_config;
 515
 516         ret = tps80031_ext_power_req_config(parent, ri->ext_ctrl_flag,
 517                         ri->rinfo->preq_bit, ri->rinfo->state_reg,
 518                         ri->rinfo->trans_reg);
 519         if (ret < 0) {
 520                 dev_err(ri->dev, "ext powerreq config failed, err = %d\n", ret);
 521                 return ret;
 522         }
 523
 524 skip_pwr_req_config:
 525         if (tps80031_pdata->ext_ctrl_flag & TPS80031_PWR_ON_ON_SLEEP) {
 526                 ret = tps80031_update(parent, TPS80031_SLAVE_ID1,
 527                                 ri->rinfo->trans_reg, TPS80031_TRANS_SLEEP_ON,
 528                                 TPS80031_TRANS_SLEEP_MASK);
 529                 if (ret < 0) {
 530                         dev_err(ri->dev, "Reg 0x%02x update failed, e %d\n",
 531                                         ri->rinfo->trans_reg, ret);
 532                         return ret;
 533                 }
 534         }
 535         return ret;
 536 }
 537
 538 static int tps80031_regulator_config(struct device *parent,
 539                 struct tps80031_regulator *ri,
 540                 struct tps80031_regulator_platform_data *tps80031_pdata)
 541 {
 542         int ret = 0;
 543
 544         switch (ri->rinfo->desc.id) {
 545         case TPS80031_REGULATOR_LDOUSB:
 546                 if (ri->config_flags & (TPS80031_USBLDO_INPUT_VSYS |
 547                         TPS80031_USBLDO_INPUT_PMID)) {
 548                         unsigned val = 0;
 549                         if (ri->config_flags & TPS80031_USBLDO_INPUT_VSYS)
 550                                 val = MISC2_LDOUSB_IN_VSYS;
 551                         else
 552                                 val = MISC2_LDOUSB_IN_PMID;
 553
 554                         ret = tps80031_update(parent, TPS80031_SLAVE_ID1,
 555                                 TPS80031_MISC2, val,
 556                                 MISC2_LDOUSB_IN_MASK);
 557                         if (ret < 0) {
 558                                 dev_err(ri->dev,
 559                                         "LDOUSB config failed, e= %d\n", ret);
 560                                 return ret;
 561                         }
 562                 }
 563                 break;
 564
 565         case TPS80031_REGULATOR_LDO3:
 566                 if (ri->config_flags & TPS80031_LDO3_OUTPUT_VIB) {
 567                         ret = tps80031_update(parent, TPS80031_SLAVE_ID1,
 568                                 TPS80031_MISC2, MISC2_LDO3_SEL_VIB_VAL,
 569                                 MISC2_LDO3_SEL_VIB_MASK);
 570                         if (ret < 0) {
 571                                 dev_err(ri->dev,
 572                                         "LDO3 config failed, e = %d\n", ret);
 573                                 return ret;
 574                         }
 575                 }
 576                 break;
 577
 578         case TPS80031_REGULATOR_VBUS:
 579                 /* Provide SW control Ops if VBUS is SW control */
 580                 if (!(ri->config_flags & TPS80031_VBUS_SW_ONLY))
 581                         ri->rinfo->desc.ops = &tps80031_vbus_sw_ops;
 582                 break;
 583         default:
 584                 break;
 585         }
 586
 587         /* Configure Active state to ON, SLEEP to OFF and OFF_state to OFF */
 588         ret = tps80031_update(parent, TPS80031_SLAVE_ID1, ri->rinfo->trans_reg,
 589                 TPS80031_TRANS_ACTIVE_ON | TPS80031_TRANS_SLEEP_OFF |
 590                 TPS80031_TRANS_OFF_OFF, TPS80031_TRANS_ACTIVE_MASK |
 591                 TPS80031_TRANS_SLEEP_MASK | TPS80031_TRANS_OFF_MASK);
 592         if (ret < 0) {
 593                 dev_err(ri->dev, "trans reg update failed, e %d\n", ret);
 594                 return ret;
 595         }
 596
 597         return ret;
 598 }
 599
 600 static int check_smps_mode_mult(struct device *parent,
 601         struct tps80031_regulator *ri)
 602 {
 603         int mult_offset;
 604         int ret;
 605         u8 smps_offset;
 606         u8 smps_mult;
 607
 608         ret = tps80031_read(parent, TPS80031_SLAVE_ID1,
 609                         TPS80031_SMPS_OFFSET, &smps_offset);
 610         if (ret < 0) {
 611                 dev_err(parent, "Error in reading smps offset register\n");
 612                 return ret;
 613         }
 614
 615         ret = tps80031_read(parent, TPS80031_SLAVE_ID1,
 616                         TPS80031_SMPS_MULT, &smps_mult);
 617         if (ret < 0) {
 618                 dev_err(parent, "Error in reading smps mult register\n");
 619                 return ret;
 620         }
 621
 622         switch (ri->rinfo->desc.id) {
 623         case TPS80031_REGULATOR_VIO:
 624                 mult_offset = SMPS_MULTOFFSET_VIO;
 625                 break;
 626         case TPS80031_REGULATOR_SMPS1:
 627                 mult_offset = SMPS_MULTOFFSET_SMPS1;
 628                 break;
 629         case TPS80031_REGULATOR_SMPS2:
 630                 mult_offset = SMPS_MULTOFFSET_SMPS2;
 631                 break;
 632         case TPS80031_REGULATOR_SMPS3:
 633                 mult_offset = SMPS_MULTOFFSET_SMPS3;
 634                 break;
 635         case TPS80031_REGULATOR_SMPS4:
 636                 mult_offset = SMPS_MULTOFFSET_SMPS4;
 637                 break;
 638         case TPS80031_REGULATOR_LDO2:
 639                 ri->device_flags = smps_mult & BIT(5) ? TRACK_MODE_ENABLE : 0;
 640                 /* TRACK mode the ldo2 varies from 600mV to 1300mV */
 641                 if (ri->device_flags & TRACK_MODE_ENABLE) {
 642                         ri->rinfo->desc.min_uV = 600000;
 643                         ri->rinfo->desc.uV_step = 12500;
 644                         ri->rinfo->desc.n_voltages = 57;
 645                         ri->rinfo->desc.vsel_mask = LDO_TRACK_VSEL_MASK;
 646                 }
 647                 return 0;
 648         default:
 649                 return 0;
 650         }
 651
 652         ri->device_flags = (smps_offset & mult_offset) ? DCDC_OFFSET_EN : 0;
 653         ri->device_flags |= (smps_mult & mult_offset) ? DCDC_EXTENDED_EN : 0;
 654         switch (ri->device_flags) {
 655         case 0:
 656                 ri->rinfo->desc.min_uV = 607700;
 657                 ri->rinfo->desc.uV_step = 12660;
 658                 break;
 659         case DCDC_OFFSET_EN:
 660                 ri->rinfo->desc.min_uV = 700000;
 661                 ri->rinfo->desc.uV_step = 12500;
 662                 break;
 663         case DCDC_EXTENDED_EN:
 664                 ri->rinfo->desc.min_uV = 1852000;
 665                 ri->rinfo->desc.uV_step = 38600;
 666                 break;
 667         case DCDC_OFFSET_EN | DCDC_EXTENDED_EN:
 668                 ri->rinfo->desc.min_uV = 2161000;
 669                 ri->rinfo->desc.uV_step = 38600;
 670                 break;
 671         }
 672         return 0;
 673 }
 674
 675 static int tps80031_regulator_probe(struct platform_device *pdev)
 676 {
 677         struct tps80031_platform_data *pdata;
 678         struct tps80031_regulator_platform_data *tps_pdata;
 679         struct tps80031_regulator *ri;
 680         struct tps80031_regulator *pmic;
 681         struct regulator_dev *rdev;
 682         struct regulator_config config = { };
 683         struct tps80031 *tps80031_mfd = dev_get_drvdata(pdev->dev.parent);
 684         int ret;
 685         int num;
 686
 687         pdata = dev_get_platdata(pdev->dev.parent);
 688
 689         if (!pdata) {
 690                 dev_err(&pdev->dev, "No platform data\n");
 691                 return -EINVAL;
 692         }
 693
 694         pmic = devm_kzalloc(&pdev->dev,
 695                         TPS80031_REGULATOR_MAX * sizeof(*pmic), GFP_KERNEL);
 696         if (!pmic)
 697                 return -ENOMEM;
 698
 699         for (num = 0; num < TPS80031_REGULATOR_MAX; ++num) {
 700                 tps_pdata = pdata->regulator_pdata[num];
 701                 ri = &pmic[num];
 702                 ri->rinfo = &tps80031_rinfo[num];
 703                 ri->dev = &pdev->dev;
 704
 705                 check_smps_mode_mult(pdev->dev.parent, ri);
 706                 config.dev = &pdev->dev;
 707                 config.init_data = NULL;
 708                 config.driver_data = ri;
 709                 config.regmap = tps80031_mfd->regmap[ri->rinfo->volt_id];
 710
 711                 if (tps_pdata) {
 712                         config.init_data = tps_pdata->reg_init_data;
 713                         ri->config_flags = tps_pdata->config_flags;
 714                         ri->ext_ctrl_flag = tps_pdata->ext_ctrl_flag;
 715                         ret = tps80031_regulator_config(pdev->dev.parent,
 716                                         ri, tps_pdata);
 717                         if (ret < 0) {
 718                                 dev_err(&pdev->dev,
 719                                         "regulator config failed, e %d\n", ret);
 720                                 return ret;
 721                         }
 722
 723                         ret = tps80031_power_req_config(pdev->dev.parent,
 724                                         ri, tps_pdata);
 725                         if (ret < 0) {
 726                                 dev_err(&pdev->dev,
 727                                         "pwr_req config failed, err %d\n", ret);
 728                                 return ret;
 729                         }
 730                 }
 731                 rdev = devm_regulator_register(&pdev->dev, &ri->rinfo->desc,
 732                                                &config);
 733                 if (IS_ERR(rdev)) {
 734                         dev_err(&pdev->dev,
 735                                 "register regulator failed %s\n",
 736                                         ri->rinfo->desc.name);
 737                         return PTR_ERR(rdev);
 738                 }
 739                 ri->rdev = rdev;
 740         }
 741
 742         platform_set_drvdata(pdev, pmic);
 743         return 0;
 744 }
 745
 746 static struct platform_driver tps80031_regulator_driver = {
 747         .driver = {
 748                 .name   = "tps80031-pmic",
 749                 .owner  = THIS_MODULE,
 750         },
 751         .probe          = tps80031_regulator_probe,
 752 };
 753
 754 static int __init tps80031_regulator_init(void)
 755 {
 756         return platform_driver_register(&tps80031_regulator_driver);
 757 }
 758 subsys_initcall(tps80031_regulator_init);
 759
 760 static void __exit tps80031_regulator_exit(void)
 761 {
 762         platform_driver_unregister(&tps80031_regulator_driver);
 763 }
 764 module_exit(tps80031_regulator_exit);
 765
 766 MODULE_ALIAS("platform:tps80031-regulator");
 767 MODULE_DESCRIPTION("Regulator Driver for TI TPS80031/TPS80032 PMIC");
 768 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
 769 MODULE_LICENSE("GPL v2");