drivers/regulator/mc13783-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Regulator Driver for Freescale MC13783 PMIC
   4 //
   5 // Copyright 2010 Yong Shen <yong.shen@linaro.org>
   6 // Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
   7 // Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
   8
   9 #include <linux/mfd/mc13783.h>
  10 #include <linux/regulator/machine.h>
  11 #include <linux/regulator/driver.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/kernel.h>
  14 #include <linux/slab.h>
  15 #include <linux/init.h>
  16 #include <linux/err.h>
  17 #include <linux/module.h>
  18 #include "mc13xxx.h"
  19
  20 #define MC13783_REG_SWITCHERS0                  24
  21 /* Enable does not exist for SW1A */
  22 #define MC13783_REG_SWITCHERS0_SW1AEN                   0
  23 #define MC13783_REG_SWITCHERS0_SW1AVSEL                 0
  24 #define MC13783_REG_SWITCHERS0_SW1AVSEL_M               (63 << 0)
  25
  26 #define MC13783_REG_SWITCHERS1                  25
  27 /* Enable does not exist for SW1B */
  28 #define MC13783_REG_SWITCHERS1_SW1BEN                   0
  29 #define MC13783_REG_SWITCHERS1_SW1BVSEL                 0
  30 #define MC13783_REG_SWITCHERS1_SW1BVSEL_M               (63 << 0)
  31
  32 #define MC13783_REG_SWITCHERS2                  26
  33 /* Enable does not exist for SW2A */
  34 #define MC13783_REG_SWITCHERS2_SW2AEN                   0
  35 #define MC13783_REG_SWITCHERS2_SW2AVSEL                 0
  36 #define MC13783_REG_SWITCHERS2_SW2AVSEL_M               (63 << 0)
  37
  38 #define MC13783_REG_SWITCHERS3                  27
  39 /* Enable does not exist for SW2B */
  40 #define MC13783_REG_SWITCHERS3_SW2BEN                   0
  41 #define MC13783_REG_SWITCHERS3_SW2BVSEL                 0
  42 #define MC13783_REG_SWITCHERS3_SW2BVSEL_M               (63 << 0)
  43
  44 #define MC13783_REG_SWITCHERS5                  29
  45 #define MC13783_REG_SWITCHERS5_SW3EN                    (1 << 20)
  46 #define MC13783_REG_SWITCHERS5_SW3VSEL                  18
  47 #define MC13783_REG_SWITCHERS5_SW3VSEL_M                (3 << 18)
  48
  49 #define MC13783_REG_REGULATORSETTING0           30
  50 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL         2
  51 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL          4
  52 #define MC13783_REG_REGULATORSETTING0_VGENVSEL          6
  53 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL        9
  54 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL        11
  55 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL         13
  56 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL          14
  57 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL         15
  58 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL          16
  59
  60 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M       (3 << 2)
  61 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M        (3 << 4)
  62 #define MC13783_REG_REGULATORSETTING0_VGENVSEL_M        (7 << 6)
  63 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M      (3 << 9)
  64 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M      (3 << 11)
  65 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M       (1 << 13)
  66 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M        (1 << 14)
  67 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M       (1 << 15)
  68 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M        (7 << 16)
  69
  70 #define MC13783_REG_REGULATORSETTING1           31
  71 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL          0
  72 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL          2
  73 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL          4
  74 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL         6
  75 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL         9
  76
  77 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M        (3 << 0)
  78 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M        (3 << 2)
  79 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M        (3 << 4)
  80 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M       (7 << 6)
  81 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M       (7 << 9)
  82
  83 #define MC13783_REG_REGULATORMODE0              32
  84 #define MC13783_REG_REGULATORMODE0_VAUDIOEN             (1 << 0)
  85 #define MC13783_REG_REGULATORMODE0_VIOHIEN              (1 << 3)
  86 #define MC13783_REG_REGULATORMODE0_VIOLOEN              (1 << 6)
  87 #define MC13783_REG_REGULATORMODE0_VDIGEN               (1 << 9)
  88 #define MC13783_REG_REGULATORMODE0_VGENEN               (1 << 12)
  89 #define MC13783_REG_REGULATORMODE0_VRFDIGEN             (1 << 15)
  90 #define MC13783_REG_REGULATORMODE0_VRFREFEN             (1 << 18)
  91 #define MC13783_REG_REGULATORMODE0_VRFCPEN              (1 << 21)
  92
  93 #define MC13783_REG_REGULATORMODE1              33
  94 #define MC13783_REG_REGULATORMODE1_VSIMEN               (1 << 0)
  95 #define MC13783_REG_REGULATORMODE1_VESIMEN              (1 << 3)
  96 #define MC13783_REG_REGULATORMODE1_VCAMEN               (1 << 6)
  97 #define MC13783_REG_REGULATORMODE1_VRFBGEN              (1 << 9)
  98 #define MC13783_REG_REGULATORMODE1_VVIBEN               (1 << 11)
  99 #define MC13783_REG_REGULATORMODE1_VRF1EN               (1 << 12)
 100 #define MC13783_REG_REGULATORMODE1_VRF2EN               (1 << 15)
 101 #define MC13783_REG_REGULATORMODE1_VMMC1EN              (1 << 18)
 102 #define MC13783_REG_REGULATORMODE1_VMMC2EN              (1 << 21)
 103
 104 #define MC13783_REG_POWERMISC                   34
 105 #define MC13783_REG_POWERMISC_GPO1EN                    (1 << 6)
 106 #define MC13783_REG_POWERMISC_GPO2EN                    (1 << 8)
 107 #define MC13783_REG_POWERMISC_GPO3EN                    (1 << 10)
 108 #define MC13783_REG_POWERMISC_GPO4EN                    (1 << 12)
 109 #define MC13783_REG_POWERMISC_PWGT1SPIEN                (1 << 15)
 110 #define MC13783_REG_POWERMISC_PWGT2SPIEN                (1 << 16)
 111
 112 #define MC13783_REG_POWERMISC_PWGTSPI_M                 (3 << 15)
 113
 114
 115 /* Voltage Values */
 116 static const int mc13783_sw1x_val[] = {
 117         900000, 925000, 950000, 975000,
 118         1000000, 1025000, 1050000, 1075000,
 119         1100000, 1125000, 1150000, 1175000,
 120         1200000, 1225000, 1250000, 1275000,
 121         1300000, 1325000, 1350000, 1375000,
 122         1400000, 1425000, 1450000, 1475000,
 123         1500000, 1525000, 1550000, 1575000,
 124         1600000, 1625000, 1650000, 1675000,
 125         1700000, 1700000, 1700000, 1700000,
 126         1800000, 1800000, 1800000, 1800000,
 127         1850000, 1850000, 1850000, 1850000,
 128         2000000, 2000000, 2000000, 2000000,
 129         2100000, 2100000, 2100000, 2100000,
 130         2200000, 2200000, 2200000, 2200000,
 131         2200000, 2200000, 2200000, 2200000,
 132         2200000, 2200000, 2200000, 2200000,
 133 };
 134
 135 static const int mc13783_sw2x_val[] = {
 136         900000, 925000, 950000, 975000,
 137         1000000, 1025000, 1050000, 1075000,
 138         1100000, 1125000, 1150000, 1175000,
 139         1200000, 1225000, 1250000, 1275000,
 140         1300000, 1325000, 1350000, 1375000,
 141         1400000, 1425000, 1450000, 1475000,
 142         1500000, 1525000, 1550000, 1575000,
 143         1600000, 1625000, 1650000, 1675000,
 144         1700000, 1700000, 1700000, 1700000,
 145         1800000, 1800000, 1800000, 1800000,
 146         1900000, 1900000, 1900000, 1900000,
 147         2000000, 2000000, 2000000, 2000000,
 148         2100000, 2100000, 2100000, 2100000,
 149         2200000, 2200000, 2200000, 2200000,
 150         2200000, 2200000, 2200000, 2200000,
 151         2200000, 2200000, 2200000, 2200000,
 152 };
 153
 154 static const unsigned int mc13783_sw3_val[] = {
 155         5000000, 5000000, 5000000, 5500000,
 156 };
 157
 158 static const unsigned int mc13783_vaudio_val[] = {
 159         2775000,
 160 };
 161
 162 static const unsigned int mc13783_viohi_val[] = {
 163         2775000,
 164 };
 165
 166 static const unsigned int mc13783_violo_val[] = {
 167         1200000, 1300000, 1500000, 1800000,
 168 };
 169
 170 static const unsigned int mc13783_vdig_val[] = {
 171         1200000, 1300000, 1500000, 1800000,
 172 };
 173
 174 static const unsigned int mc13783_vgen_val[] = {
 175         1200000, 1300000, 1500000, 1800000,
 176         1100000, 2000000, 2775000, 2400000,
 177 };
 178
 179 static const unsigned int mc13783_vrfdig_val[] = {
 180         1200000, 1500000, 1800000, 1875000,
 181 };
 182
 183 static const unsigned int mc13783_vrfref_val[] = {
 184         2475000, 2600000, 2700000, 2775000,
 185 };
 186
 187 static const unsigned int mc13783_vrfcp_val[] = {
 188         2700000, 2775000,
 189 };
 190
 191 static const unsigned int mc13783_vsim_val[] = {
 192         1800000, 2900000, 3000000,
 193 };
 194
 195 static const unsigned int mc13783_vesim_val[] = {
 196         1800000, 2900000,
 197 };
 198
 199 static const unsigned int mc13783_vcam_val[] = {
 200         1500000, 1800000, 2500000, 2550000,
 201         2600000, 2750000, 2800000, 3000000,
 202 };
 203
 204 static const unsigned int mc13783_vrfbg_val[] = {
 205         1250000,
 206 };
 207
 208 static const unsigned int mc13783_vvib_val[] = {
 209         1300000, 1800000, 2000000, 3000000,
 210 };
 211
 212 static const unsigned int mc13783_vmmc_val[] = {
 213         1600000, 1800000, 2000000, 2600000,
 214         2700000, 2800000, 2900000, 3000000,
 215 };
 216
 217 static const unsigned int mc13783_vrf_val[] = {
 218         1500000, 1875000, 2700000, 2775000,
 219 };
 220
 221 static const unsigned int mc13783_gpo_val[] = {
 222         3100000,
 223 };
 224
 225 static const unsigned int mc13783_pwgtdrv_val[] = {
 226         5500000,
 227 };
 228
 229 static struct regulator_ops mc13783_gpo_regulator_ops;
 230
 231 #define MC13783_DEFINE(prefix, name, reg, vsel_reg, voltages)   \
 232         MC13xxx_DEFINE(MC13783_REG_, name, reg, vsel_reg, voltages, \
 233                         mc13xxx_regulator_ops)
 234
 235 #define MC13783_FIXED_DEFINE(prefix, name, reg, voltages)               \
 236         MC13xxx_FIXED_DEFINE(MC13783_REG_, name, reg, voltages, \
 237                         mc13xxx_fixed_regulator_ops)
 238
 239 #define MC13783_GPO_DEFINE(prefix, name, reg, voltages)         \
 240         MC13xxx_GPO_DEFINE(MC13783_REG_, name, reg, voltages, \
 241                         mc13783_gpo_regulator_ops)
 242
 243 #define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages)            \
 244         MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)
 245 #define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages)          \
 246         MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)
 247
 248 static struct mc13xxx_regulator mc13783_regulators[] = {
 249         MC13783_DEFINE_SW(SW1A, SWITCHERS0, SWITCHERS0, mc13783_sw1x_val),
 250         MC13783_DEFINE_SW(SW1B, SWITCHERS1, SWITCHERS1, mc13783_sw1x_val),
 251         MC13783_DEFINE_SW(SW2A, SWITCHERS2, SWITCHERS2, mc13783_sw2x_val),
 252         MC13783_DEFINE_SW(SW2B, SWITCHERS3, SWITCHERS3, mc13783_sw2x_val),
 253         MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),
 254
 255         MC13783_FIXED_DEFINE(REG, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),
 256         MC13783_FIXED_DEFINE(REG, VIOHI, REGULATORMODE0, mc13783_viohi_val),
 257         MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0,
 258                             mc13783_violo_val),
 259         MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0,
 260                             mc13783_vdig_val),
 261         MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0,
 262                             mc13783_vgen_val),
 263         MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0,
 264                             mc13783_vrfdig_val),
 265         MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0,
 266                             mc13783_vrfref_val),
 267         MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0,
 268                             mc13783_vrfcp_val),
 269         MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0,
 270                             mc13783_vsim_val),
 271         MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0,
 272                             mc13783_vesim_val),
 273         MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0,
 274                             mc13783_vcam_val),
 275         MC13783_FIXED_DEFINE(REG, VRFBG, REGULATORMODE1, mc13783_vrfbg_val),
 276         MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1,
 277                             mc13783_vvib_val),
 278         MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1,
 279                             mc13783_vrf_val),
 280         MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1,
 281                             mc13783_vrf_val),
 282         MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1,
 283                             mc13783_vmmc_val),
 284         MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1,
 285                             mc13783_vmmc_val),
 286         MC13783_GPO_DEFINE(REG, GPO1, POWERMISC, mc13783_gpo_val),
 287         MC13783_GPO_DEFINE(REG, GPO2, POWERMISC, mc13783_gpo_val),
 288         MC13783_GPO_DEFINE(REG, GPO3, POWERMISC, mc13783_gpo_val),
 289         MC13783_GPO_DEFINE(REG, GPO4, POWERMISC, mc13783_gpo_val),
 290         MC13783_GPO_DEFINE(REG, PWGT1SPI, POWERMISC, mc13783_pwgtdrv_val),
 291         MC13783_GPO_DEFINE(REG, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val),
 292 };
 293
 294 static int mc13783_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask,
 295                 u32 val)
 296 {
 297         struct mc13xxx *mc13783 = priv->mc13xxx;
 298         int ret;
 299         u32 valread;
 300
 301         BUG_ON(val & ~mask);
 302
 303         mc13xxx_lock(priv->mc13xxx);
 304         ret = mc13xxx_reg_read(mc13783, MC13783_REG_POWERMISC, &valread);
 305         if (ret)
 306                 goto out;
 307
 308         /* Update the stored state for Power Gates. */
 309         priv->powermisc_pwgt_state =
 310                                 (priv->powermisc_pwgt_state & ~mask) | val;
 311         priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M;
 312
 313         /* Construct the new register value */
 314         valread = (valread & ~mask) | val;
 315         /* Overwrite the PWGTxEN with the stored version */
 316         valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
 317                                                 priv->powermisc_pwgt_state;
 318
 319         ret = mc13xxx_reg_write(mc13783, MC13783_REG_POWERMISC, valread);
 320 out:
 321         mc13xxx_unlock(priv->mc13xxx);
 322         return ret;
 323 }
 324
 325 static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)
 326 {
 327         struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
 328         struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
 329         int id = rdev_get_id(rdev);
 330         u32 en_val = mc13xxx_regulators[id].enable_bit;
 331
 332         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 333
 334         /* Power Gate enable value is 0 */
 335         if (id == MC13783_REG_PWGT1SPI ||
 336             id == MC13783_REG_PWGT2SPI)
 337                 en_val = 0;
 338
 339         return mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
 340                                         en_val);
 341 }
 342
 343 static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)
 344 {
 345         struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
 346         struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
 347         int id = rdev_get_id(rdev);
 348         u32 dis_val = 0;
 349
 350         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 351
 352         /* Power Gate disable value is 1 */
 353         if (id == MC13783_REG_PWGT1SPI ||
 354             id == MC13783_REG_PWGT2SPI)
 355                 dis_val = mc13xxx_regulators[id].enable_bit;
 356
 357         return mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
 358                                         dis_val);
 359 }
 360
 361 static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev)
 362 {
 363         struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
 364         struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
 365         int ret, id = rdev_get_id(rdev);
 366         unsigned int val;
 367
 368         mc13xxx_lock(priv->mc13xxx);
 369         ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val);
 370         mc13xxx_unlock(priv->mc13xxx);
 371
 372         if (ret)
 373                 return ret;
 374
 375         /* Power Gates state is stored in powermisc_pwgt_state
 376          * where the meaning of bits is negated */
 377         val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
 378               (priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M);
 379
 380         return (val & mc13xxx_regulators[id].enable_bit) != 0;
 381 }
 382
 383 static struct regulator_ops mc13783_gpo_regulator_ops = {
 384         .enable = mc13783_gpo_regulator_enable,
 385         .disable = mc13783_gpo_regulator_disable,
 386         .is_enabled = mc13783_gpo_regulator_is_enabled,
 387         .list_voltage = regulator_list_voltage_table,
 388         .set_voltage = mc13xxx_fixed_regulator_set_voltage,
 389 };
 390
 391 static int mc13783_regulator_probe(struct platform_device *pdev)
 392 {
 393         struct mc13xxx_regulator_priv *priv;
 394         struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
 395         struct mc13xxx_regulator_platform_data *pdata =
 396                 dev_get_platdata(&pdev->dev);
 397         struct mc13xxx_regulator_init_data *mc13xxx_data;
 398         struct regulator_config config = { };
 399         int i, num_regulators;
 400
 401         num_regulators = mc13xxx_get_num_regulators_dt(pdev);
 402
 403         if (num_regulators <= 0 && pdata)
 404                 num_regulators = pdata->num_regulators;
 405         if (num_regulators <= 0)
 406                 return -EINVAL;
 407
 408         priv = devm_kzalloc(&pdev->dev,
 409                             struct_size(priv, regulators, num_regulators),
 410                             GFP_KERNEL);
 411         if (!priv)
 412                 return -ENOMEM;
 413
 414         priv->num_regulators = num_regulators;
 415         priv->mc13xxx_regulators = mc13783_regulators;
 416         priv->mc13xxx = mc13783;
 417         platform_set_drvdata(pdev, priv);
 418
 419         mc13xxx_data = mc13xxx_parse_regulators_dt(pdev, mc13783_regulators,
 420                                         ARRAY_SIZE(mc13783_regulators));
 421
 422         for (i = 0; i < priv->num_regulators; i++) {
 423                 struct regulator_init_data *init_data;
 424                 struct regulator_desc *desc;
 425                 struct device_node *node = NULL;
 426                 int id;
 427
 428                 if (mc13xxx_data) {
 429                         id = mc13xxx_data[i].id;
 430                         init_data = mc13xxx_data[i].init_data;
 431                         node = mc13xxx_data[i].node;
 432                 } else {
 433                         id = pdata->regulators[i].id;
 434                         init_data = pdata->regulators[i].init_data;
 435                 }
 436                 desc = &mc13783_regulators[id].desc;
 437
 438                 config.dev = &pdev->dev;
 439                 config.init_data = init_data;
 440                 config.driver_data = priv;
 441                 config.of_node = node;
 442
 443                 priv->regulators[i] = devm_regulator_register(&pdev->dev, desc,
 444                                                               &config);
 445                 if (IS_ERR(priv->regulators[i])) {
 446                         dev_err(&pdev->dev, "failed to register regulator %s\n",
 447                                 mc13783_regulators[i].desc.name);
 448                         return PTR_ERR(priv->regulators[i]);
 449                 }
 450         }
 451
 452         return 0;
 453 }
 454
 455 static struct platform_driver mc13783_regulator_driver = {
 456         .driver = {
 457                 .name   = "mc13783-regulator",
 458         },
 459         .probe          = mc13783_regulator_probe,
 460 };
 461
 462 static int __init mc13783_regulator_init(void)
 463 {
 464         return platform_driver_register(&mc13783_regulator_driver);
 465 }
 466 subsys_initcall(mc13783_regulator_init);
 467
 468 static void __exit mc13783_regulator_exit(void)
 469 {
 470         platform_driver_unregister(&mc13783_regulator_driver);
 471 }
 472 module_exit(mc13783_regulator_exit);
 473
 474 MODULE_LICENSE("GPL v2");
 475 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 476 MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
 477 MODULE_ALIAS("platform:mc13783-regulator");