drivers/regulator/mc13783-regulator.c

   1 /*
   2  * Regulator Driver for Freescale MC13783 PMIC
   3  *
   4  * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
   5  * Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/mfd/mc13783.h>
  13 #include <linux/regulator/machine.h>
  14 #include <linux/regulator/driver.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/kernel.h>
  17 #include <linux/slab.h>
  18 #include <linux/init.h>
  19 #include <linux/err.h>
  20
  21 #define MC13783_REG_SWITCHERS5                  29
  22 #define MC13783_REG_SWITCHERS5_SW3EN                    (1 << 20)
  23 #define MC13783_REG_SWITCHERS5_SW3VSEL                  18
  24 #define MC13783_REG_SWITCHERS5_SW3VSEL_M                (3 << 18)
  25
  26 #define MC13783_REG_REGULATORSETTING0           30
  27 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL         2
  28 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL          4
  29 #define MC13783_REG_REGULATORSETTING0_VGENVSEL          6
  30 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL        9
  31 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL        11
  32 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL         13
  33 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL          14
  34 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL         15
  35 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL          16
  36
  37 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M       (3 << 2)
  38 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M        (3 << 4)
  39 #define MC13783_REG_REGULATORSETTING0_VGENVSEL_M        (7 << 6)
  40 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M      (3 << 9)
  41 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M      (3 << 11)
  42 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M       (1 << 13)
  43 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M        (1 << 14)
  44 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M       (1 << 15)
  45 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M        (7 << 16)
  46
  47 #define MC13783_REG_REGULATORSETTING1           31
  48 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL          0
  49 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL          2
  50 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL          4
  51 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL         6
  52 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL         9
  53
  54 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M        (3 << 0)
  55 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M        (3 << 2)
  56 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M        (3 << 4)
  57 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M       (7 << 6)
  58 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M       (7 << 9)
  59
  60 #define MC13783_REG_REGULATORMODE0              32
  61 #define MC13783_REG_REGULATORMODE0_VAUDIOEN             (1 << 0)
  62 #define MC13783_REG_REGULATORMODE0_VIOHIEN              (1 << 3)
  63 #define MC13783_REG_REGULATORMODE0_VIOLOEN              (1 << 6)
  64 #define MC13783_REG_REGULATORMODE0_VDIGEN               (1 << 9)
  65 #define MC13783_REG_REGULATORMODE0_VGENEN               (1 << 12)
  66 #define MC13783_REG_REGULATORMODE0_VRFDIGEN             (1 << 15)
  67 #define MC13783_REG_REGULATORMODE0_VRFREFEN             (1 << 18)
  68 #define MC13783_REG_REGULATORMODE0_VRFCPEN              (1 << 21)
  69
  70 #define MC13783_REG_REGULATORMODE1              33
  71 #define MC13783_REG_REGULATORMODE1_VSIMEN               (1 << 0)
  72 #define MC13783_REG_REGULATORMODE1_VESIMEN              (1 << 3)
  73 #define MC13783_REG_REGULATORMODE1_VCAMEN               (1 << 6)
  74 #define MC13783_REG_REGULATORMODE1_VRFBGEN              (1 << 9)
  75 #define MC13783_REG_REGULATORMODE1_VVIBEN               (1 << 11)
  76 #define MC13783_REG_REGULATORMODE1_VRF1EN               (1 << 12)
  77 #define MC13783_REG_REGULATORMODE1_VRF2EN               (1 << 15)
  78 #define MC13783_REG_REGULATORMODE1_VMMC1EN              (1 << 18)
  79 #define MC13783_REG_REGULATORMODE1_VMMC2EN              (1 << 21)
  80
  81 #define MC13783_REG_POWERMISC                   34
  82 #define MC13783_REG_POWERMISC_GPO1EN                    (1 << 6)
  83 #define MC13783_REG_POWERMISC_GPO2EN                    (1 << 8)
  84 #define MC13783_REG_POWERMISC_GPO3EN                    (1 << 10)
  85 #define MC13783_REG_POWERMISC_GPO4EN                    (1 << 12)
  86 #define MC13783_REG_POWERMISC_PWGT1SPIEN                (1 << 15)
  87 #define MC13783_REG_POWERMISC_PWGT2SPIEN                (1 << 16)
  88
  89 #define MC13783_REG_POWERMISC_PWGTSPI_M                 (3 << 15)
  90
  91
  92 struct mc13783_regulator {
  93         struct regulator_desc desc;
  94         int reg;
  95         int enable_bit;
  96         int vsel_reg;
  97         int vsel_shift;
  98         int vsel_mask;
  99         int const *voltages;
 100 };
 101
 102 /* Voltage Values */
 103 static const int const mc13783_sw3_val[] = {
 104         5000000, 5000000, 5000000, 5500000,
 105 };
 106
 107 static const int const mc13783_vaudio_val[] = {
 108         2775000,
 109 };
 110
 111 static const int const mc13783_viohi_val[] = {
 112         2775000,
 113 };
 114
 115 static const int const mc13783_violo_val[] = {
 116         1200000, 1300000, 1500000, 1800000,
 117 };
 118
 119 static const int const mc13783_vdig_val[] = {
 120         1200000, 1300000, 1500000, 1800000,
 121 };
 122
 123 static const int const mc13783_vgen_val[] = {
 124         1200000, 1300000, 1500000, 1800000,
 125         1100000, 2000000, 2775000, 2400000,
 126 };
 127
 128 static const int const mc13783_vrfdig_val[] = {
 129         1200000, 1500000, 1800000, 1875000,
 130 };
 131
 132 static const int const mc13783_vrfref_val[] = {
 133         2475000, 2600000, 2700000, 2775000,
 134 };
 135
 136 static const int const mc13783_vrfcp_val[] = {
 137         2700000, 2775000,
 138 };
 139
 140 static const int const mc13783_vsim_val[] = {
 141         1800000, 2900000, 3000000,
 142 };
 143
 144 static const int const mc13783_vesim_val[] = {
 145         1800000, 2900000,
 146 };
 147
 148 static const int const mc13783_vcam_val[] = {
 149         1500000, 1800000, 2500000, 2550000,
 150         2600000, 2750000, 2800000, 3000000,
 151 };
 152
 153 static const int const mc13783_vrfbg_val[] = {
 154         1250000,
 155 };
 156
 157 static const int const mc13783_vvib_val[] = {
 158         1300000, 1800000, 2000000, 3000000,
 159 };
 160
 161 static const int const mc13783_vmmc_val[] = {
 162         1600000, 1800000, 2000000, 2600000,
 163         2700000, 2800000, 2900000, 3000000,
 164 };
 165
 166 static const int const mc13783_vrf_val[] = {
 167         1500000, 1875000, 2700000, 2775000,
 168 };
 169
 170 static const int const mc13783_gpo_val[] = {
 171         3100000,
 172 };
 173
 174 static const int const mc13783_pwgtdrv_val[] = {
 175         5500000,
 176 };
 177
 178 static struct regulator_ops mc13783_regulator_ops;
 179 static struct regulator_ops mc13783_fixed_regulator_ops;
 180 static struct regulator_ops mc13783_gpo_regulator_ops;
 181
 182 #define MC13783_DEFINE(prefix, _name, _reg, _vsel_reg, _voltages)       \
 183         [MC13783_ ## prefix ## _ ## _name] = {                          \
 184                 .desc = {                                               \
 185                         .name = #prefix "_" #_name,                     \
 186                         .n_voltages = ARRAY_SIZE(_voltages),            \
 187                         .ops = &mc13783_regulator_ops,                  \
 188                         .type = REGULATOR_VOLTAGE,                      \
 189                         .id = MC13783_ ## prefix ## _ ## _name,         \
 190                         .owner = THIS_MODULE,                           \
 191                 },                                                      \
 192                 .reg = MC13783_REG_ ## _reg,                            \
 193                 .enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
 194                 .vsel_reg = MC13783_REG_ ## _vsel_reg,                  \
 195                 .vsel_shift = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL,\
 196                 .vsel_mask = MC13783_REG_ ## _vsel_reg ## _ ## _name ## VSEL_M,\
 197                 .voltages =  _voltages,                                 \
 198         }
 199
 200 #define MC13783_FIXED_DEFINE(prefix, _name, _reg, _voltages)            \
 201         [MC13783_ ## prefix ## _ ## _name] = {                          \
 202                 .desc = {                                               \
 203                         .name = #prefix "_" #_name,                     \
 204                         .n_voltages = ARRAY_SIZE(_voltages),            \
 205                         .ops = &mc13783_fixed_regulator_ops,            \
 206                         .type = REGULATOR_VOLTAGE,                      \
 207                         .id = MC13783_ ## prefix ## _ ## _name,         \
 208                         .owner = THIS_MODULE,                           \
 209                 },                                                      \
 210                 .reg = MC13783_REG_ ## _reg,                            \
 211                 .enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
 212                 .voltages =  _voltages,                                 \
 213         }
 214
 215 #define MC13783_GPO_DEFINE(prefix, _name, _reg,  _voltages)             \
 216         [MC13783_ ## prefix ## _ ## _name] = {                          \
 217                 .desc = {                                               \
 218                         .name = #prefix "_" #_name,                     \
 219                         .n_voltages = ARRAY_SIZE(_voltages),            \
 220                         .ops = &mc13783_gpo_regulator_ops,              \
 221                         .type = REGULATOR_VOLTAGE,                      \
 222                         .id = MC13783_ ## prefix ## _ ## _name,         \
 223                         .owner = THIS_MODULE,                           \
 224                 },                                                      \
 225                 .reg = MC13783_REG_ ## _reg,                            \
 226                 .enable_bit = MC13783_REG_ ## _reg ## _ ## _name ## EN, \
 227                 .voltages =  _voltages,                                 \
 228         }
 229
 230 #define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages)            \
 231         MC13783_DEFINE(SW, _name, _reg, _vsel_reg, _voltages)
 232 #define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages)          \
 233         MC13783_DEFINE(REGU, _name, _reg, _vsel_reg, _voltages)
 234
 235 static struct mc13783_regulator mc13783_regulators[] = {
 236         MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),
 237
 238         MC13783_FIXED_DEFINE(REGU, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),
 239         MC13783_FIXED_DEFINE(REGU, VIOHI, REGULATORMODE0, mc13783_viohi_val),
 240         MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0,   \
 241                             mc13783_violo_val),
 242         MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0,    \
 243                             mc13783_vdig_val),
 244         MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0,    \
 245                             mc13783_vgen_val),
 246         MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0,  \
 247                             mc13783_vrfdig_val),
 248         MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0,  \
 249                             mc13783_vrfref_val),
 250         MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0,   \
 251                             mc13783_vrfcp_val),
 252         MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0,    \
 253                             mc13783_vsim_val),
 254         MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0,   \
 255                             mc13783_vesim_val),
 256         MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0,    \
 257                             mc13783_vcam_val),
 258         MC13783_FIXED_DEFINE(REGU, VRFBG, REGULATORMODE1, mc13783_vrfbg_val),
 259         MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1,    \
 260                             mc13783_vvib_val),
 261         MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1,    \
 262                             mc13783_vrf_val),
 263         MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1,    \
 264                             mc13783_vrf_val),
 265         MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1,   \
 266                             mc13783_vmmc_val),
 267         MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1,   \
 268                             mc13783_vmmc_val),
 269         MC13783_GPO_DEFINE(REGU, GPO1, POWERMISC, mc13783_gpo_val),
 270         MC13783_GPO_DEFINE(REGU, GPO2, POWERMISC, mc13783_gpo_val),
 271         MC13783_GPO_DEFINE(REGU, GPO3, POWERMISC, mc13783_gpo_val),
 272         MC13783_GPO_DEFINE(REGU, GPO4, POWERMISC, mc13783_gpo_val),
 273         MC13783_GPO_DEFINE(REGU, PWGT1SPI, POWERMISC, mc13783_pwgtdrv_val),
 274         MC13783_GPO_DEFINE(REGU, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val),
 275 };
 276
 277 struct mc13783_regulator_priv {
 278         struct mc13783 *mc13783;
 279         u32 powermisc_pwgt_state;
 280         struct regulator_dev *regulators[];
 281 };
 282
 283 static int mc13783_regulator_enable(struct regulator_dev *rdev)
 284 {
 285         struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
 286         int id = rdev_get_id(rdev);
 287         int ret;
 288
 289         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 290
 291         mc13783_lock(priv->mc13783);
 292         ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
 293                         mc13783_regulators[id].enable_bit,
 294                         mc13783_regulators[id].enable_bit);
 295         mc13783_unlock(priv->mc13783);
 296
 297         return ret;
 298 }
 299
 300 static int mc13783_regulator_disable(struct regulator_dev *rdev)
 301 {
 302         struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
 303         int id = rdev_get_id(rdev);
 304         int ret;
 305
 306         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 307
 308         mc13783_lock(priv->mc13783);
 309         ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].reg,
 310                         mc13783_regulators[id].enable_bit, 0);
 311         mc13783_unlock(priv->mc13783);
 312
 313         return ret;
 314 }
 315
 316 static int mc13783_regulator_is_enabled(struct regulator_dev *rdev)
 317 {
 318         struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
 319         int ret, id = rdev_get_id(rdev);
 320         unsigned int val;
 321
 322         mc13783_lock(priv->mc13783);
 323         ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);
 324         mc13783_unlock(priv->mc13783);
 325
 326         if (ret)
 327                 return ret;
 328
 329         return (val & mc13783_regulators[id].enable_bit) != 0;
 330 }
 331
 332 static int mc13783_regulator_list_voltage(struct regulator_dev *rdev,
 333                                                 unsigned selector)
 334 {
 335         int id = rdev_get_id(rdev);
 336
 337         if (selector >= mc13783_regulators[id].desc.n_voltages)
 338                 return -EINVAL;
 339
 340         return mc13783_regulators[id].voltages[selector];
 341 }
 342
 343 static int mc13783_get_best_voltage_index(struct regulator_dev *rdev,
 344                                                 int min_uV, int max_uV)
 345 {
 346         int reg_id = rdev_get_id(rdev);
 347         int i;
 348         int bestmatch;
 349         int bestindex;
 350
 351         /*
 352          * Locate the minimum voltage fitting the criteria on
 353          * this regulator. The switchable voltages are not
 354          * in strict falling order so we need to check them
 355          * all for the best match.
 356          */
 357         bestmatch = INT_MAX;
 358         bestindex = -1;
 359         for (i = 0; i < mc13783_regulators[reg_id].desc.n_voltages; i++) {
 360                 if (mc13783_regulators[reg_id].voltages[i] >= min_uV &&
 361                     mc13783_regulators[reg_id].voltages[i] < bestmatch) {
 362                         bestmatch = mc13783_regulators[reg_id].voltages[i];
 363                         bestindex = i;
 364                 }
 365         }
 366
 367         if (bestindex < 0 || bestmatch > max_uV) {
 368                 dev_warn(&rdev->dev, "no possible value for %d<=x<=%d uV\n",
 369                                 min_uV, max_uV);
 370                 return -EINVAL;
 371         }
 372         return bestindex;
 373 }
 374
 375 static int mc13783_regulator_set_voltage(struct regulator_dev *rdev,
 376                                                 int min_uV, int max_uV)
 377 {
 378         struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
 379         int value, id = rdev_get_id(rdev);
 380         int ret;
 381
 382         dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
 383                 __func__, id, min_uV, max_uV);
 384
 385         /* Find the best index */
 386         value = mc13783_get_best_voltage_index(rdev, min_uV, max_uV);
 387         dev_dbg(rdev_get_dev(rdev), "%s best value: %d \n", __func__, value);
 388         if (value < 0)
 389                 return value;
 390
 391         mc13783_lock(priv->mc13783);
 392         ret = mc13783_reg_rmw(priv->mc13783, mc13783_regulators[id].vsel_reg,
 393                         mc13783_regulators[id].vsel_mask,
 394                         value << mc13783_regulators[id].vsel_shift);
 395         mc13783_unlock(priv->mc13783);
 396
 397         return ret;
 398 }
 399
 400 static int mc13783_regulator_get_voltage(struct regulator_dev *rdev)
 401 {
 402         struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
 403         int ret, id = rdev_get_id(rdev);
 404         unsigned int val;
 405
 406         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 407
 408         mc13783_lock(priv->mc13783);
 409         ret = mc13783_reg_read(priv->mc13783,
 410                                 mc13783_regulators[id].vsel_reg, &val);
 411         mc13783_unlock(priv->mc13783);
 412
 413         if (ret)
 414                 return ret;
 415
 416         val = (val & mc13783_regulators[id].vsel_mask)
 417                 >> mc13783_regulators[id].vsel_shift;
 418
 419         dev_dbg(rdev_get_dev(rdev), "%s id: %d val: %d\n", __func__, id, val);
 420
 421         BUG_ON(val < 0 || val > mc13783_regulators[id].desc.n_voltages);
 422
 423         return mc13783_regulators[id].voltages[val];
 424 }
 425
 426 static struct regulator_ops mc13783_regulator_ops = {
 427         .enable = mc13783_regulator_enable,
 428         .disable = mc13783_regulator_disable,
 429         .is_enabled = mc13783_regulator_is_enabled,
 430         .list_voltage = mc13783_regulator_list_voltage,
 431         .set_voltage = mc13783_regulator_set_voltage,
 432         .get_voltage = mc13783_regulator_get_voltage,
 433 };
 434
 435 static int mc13783_fixed_regulator_set_voltage(struct regulator_dev *rdev,
 436                                                 int min_uV, int max_uV)
 437 {
 438         int id = rdev_get_id(rdev);
 439
 440         dev_dbg(rdev_get_dev(rdev), "%s id: %d min_uV: %d max_uV: %d\n",
 441                 __func__, id, min_uV, max_uV);
 442
 443         if (min_uV > mc13783_regulators[id].voltages[0] &&
 444             max_uV < mc13783_regulators[id].voltages[0])
 445                 return 0;
 446         else
 447                 return -EINVAL;
 448 }
 449
 450 static int mc13783_fixed_regulator_get_voltage(struct regulator_dev *rdev)
 451 {
 452         int id = rdev_get_id(rdev);
 453
 454         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 455
 456         return mc13783_regulators[id].voltages[0];
 457 }
 458
 459 static struct regulator_ops mc13783_fixed_regulator_ops = {
 460         .enable = mc13783_regulator_enable,
 461         .disable = mc13783_regulator_disable,
 462         .is_enabled = mc13783_regulator_is_enabled,
 463         .list_voltage = mc13783_regulator_list_voltage,
 464         .set_voltage = mc13783_fixed_regulator_set_voltage,
 465         .get_voltage = mc13783_fixed_regulator_get_voltage,
 466 };
 467
 468 int mc13783_powermisc_rmw(struct mc13783_regulator_priv *priv, u32 mask,
 469                                                                         u32 val)
 470 {
 471         struct mc13783 *mc13783 = priv->mc13783;
 472         int ret;
 473         u32 valread;
 474
 475         BUG_ON(val & ~mask);
 476
 477         ret = mc13783_reg_read(mc13783, MC13783_REG_POWERMISC, &valread);
 478         if (ret)
 479                 return ret;
 480
 481         /* Update the stored state for Power Gates. */
 482         priv->powermisc_pwgt_state =
 483                                 (priv->powermisc_pwgt_state & ~mask) | val;
 484         priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M;
 485
 486         /* Construct the new register value */
 487         valread = (valread & ~mask) | val;
 488         /* Overwrite the PWGTxEN with the stored version */
 489         valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
 490                                                 priv->powermisc_pwgt_state;
 491
 492         return mc13783_reg_write(mc13783, MC13783_REG_POWERMISC, valread);
 493 }
 494
 495 static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)
 496 {
 497         struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
 498         int id = rdev_get_id(rdev);
 499         int ret;
 500         u32 en_val = mc13783_regulators[id].enable_bit;
 501
 502         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 503
 504         /* Power Gate enable value is 0 */
 505         if (id == MC13783_REGU_PWGT1SPI ||
 506             id == MC13783_REGU_PWGT2SPI)
 507                 en_val = 0;
 508
 509         mc13783_lock(priv->mc13783);
 510         ret = mc13783_powermisc_rmw(priv, mc13783_regulators[id].enable_bit,
 511                                         en_val);
 512         mc13783_unlock(priv->mc13783);
 513
 514         return ret;
 515 }
 516
 517 static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)
 518 {
 519         struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
 520         int id = rdev_get_id(rdev);
 521         int ret;
 522         u32 dis_val = 0;
 523
 524         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 525
 526         /* Power Gate disable value is 1 */
 527         if (id == MC13783_REGU_PWGT1SPI ||
 528             id == MC13783_REGU_PWGT2SPI)
 529                 dis_val = mc13783_regulators[id].enable_bit;
 530
 531         mc13783_lock(priv->mc13783);
 532         ret = mc13783_powermisc_rmw(priv, mc13783_regulators[id].enable_bit,
 533                                         dis_val);
 534         mc13783_unlock(priv->mc13783);
 535
 536         return ret;
 537 }
 538
 539 static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev)
 540 {
 541         struct mc13783_regulator_priv *priv = rdev_get_drvdata(rdev);
 542         int ret, id = rdev_get_id(rdev);
 543         unsigned int val;
 544
 545         mc13783_lock(priv->mc13783);
 546         ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);
 547         mc13783_unlock(priv->mc13783);
 548
 549         if (ret)
 550                 return ret;
 551
 552         /* Power Gates state is stored in powermisc_pwgt_state
 553          * where the meaning of bits is negated */
 554         val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
 555               (priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M);
 556
 557         return (val & mc13783_regulators[id].enable_bit) != 0;
 558 }
 559
 560 static struct regulator_ops mc13783_gpo_regulator_ops = {
 561         .enable = mc13783_gpo_regulator_enable,
 562         .disable = mc13783_gpo_regulator_disable,
 563         .is_enabled = mc13783_gpo_regulator_is_enabled,
 564         .list_voltage = mc13783_regulator_list_voltage,
 565         .set_voltage = mc13783_fixed_regulator_set_voltage,
 566         .get_voltage = mc13783_fixed_regulator_get_voltage,
 567 };
 568
 569 static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
 570 {
 571         struct mc13783_regulator_priv *priv;
 572         struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent);
 573         struct mc13783_regulator_platform_data *pdata =
 574                 dev_get_platdata(&pdev->dev);
 575         struct mc13783_regulator_init_data *init_data;
 576         int i, ret;
 577
 578         dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id);
 579
 580         priv = kzalloc(sizeof(*priv) +
 581                         pdata->num_regulators * sizeof(priv->regulators[0]),
 582                         GFP_KERNEL);
 583         if (!priv)
 584                 return -ENOMEM;
 585
 586         priv->mc13783 = mc13783;
 587
 588         for (i = 0; i < pdata->num_regulators; i++) {
 589                 init_data = &pdata->regulators[i];
 590                 priv->regulators[i] = regulator_register(
 591                                 &mc13783_regulators[init_data->id].desc,
 592                                 &pdev->dev, init_data->init_data, priv);
 593
 594                 if (IS_ERR(priv->regulators[i])) {
 595                         dev_err(&pdev->dev, "failed to register regulator %s\n",
 596                                 mc13783_regulators[i].desc.name);
 597                         ret = PTR_ERR(priv->regulators[i]);
 598                         goto err;
 599                 }
 600         }
 601
 602         platform_set_drvdata(pdev, priv);
 603
 604         return 0;
 605 err:
 606         while (--i >= 0)
 607                 regulator_unregister(priv->regulators[i]);
 608
 609         kfree(priv);
 610
 611         return ret;
 612 }
 613
 614 static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
 615 {
 616         struct mc13783_regulator_priv *priv = platform_get_drvdata(pdev);
 617         struct mc13783_regulator_platform_data *pdata =
 618                 dev_get_platdata(&pdev->dev);
 619         int i;
 620
 621         platform_set_drvdata(pdev, NULL);
 622
 623         for (i = 0; i < pdata->num_regulators; i++)
 624                 regulator_unregister(priv->regulators[i]);
 625
 626         kfree(priv);
 627         return 0;
 628 }
 629
 630 static struct platform_driver mc13783_regulator_driver = {
 631         .driver = {
 632                 .name   = "mc13783-regulator",
 633                 .owner  = THIS_MODULE,
 634         },
 635         .remove         = __devexit_p(mc13783_regulator_remove),
 636         .probe          = mc13783_regulator_probe,
 637 };
 638
 639 static int __init mc13783_regulator_init(void)
 640 {
 641         return platform_driver_register(&mc13783_regulator_driver);
 642 }
 643 subsys_initcall(mc13783_regulator_init);
 644
 645 static void __exit mc13783_regulator_exit(void)
 646 {
 647         platform_driver_unregister(&mc13783_regulator_driver);
 648 }
 649 module_exit(mc13783_regulator_exit);
 650
 651 MODULE_LICENSE("GPL v2");
 652 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
 653 MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
 654 MODULE_ALIAS("platform:mc13783-regulator");