drivers/regulator/mc13783-regulator.c

   1 /*
   2  * Regulator Driver for Freescale MC13783 PMIC
   3  *
   4  * Copyright 2010 Yong Shen <yong.shen@linaro.org>
   5  * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
   6  * Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/mfd/mc13783.h>
  14 #include <linux/regulator/machine.h>
  15 #include <linux/regulator/driver.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/kernel.h>
  18 #include <linux/slab.h>
  19 #include <linux/init.h>
  20 #include <linux/err.h>
  21 #include <linux/module.h>
  22 #include "mc13xxx.h"
  23
  24 #define MC13783_REG_SWITCHERS0                  24
  25 /* Enable does not exist for SW1A */
  26 #define MC13783_REG_SWITCHERS0_SW1AEN                   0
  27 #define MC13783_REG_SWITCHERS0_SW1AVSEL                 0
  28 #define MC13783_REG_SWITCHERS0_SW1AVSEL_M               (63 << 0)
  29
  30 #define MC13783_REG_SWITCHERS1                  25
  31 /* Enable does not exist for SW1B */
  32 #define MC13783_REG_SWITCHERS1_SW1BEN                   0
  33 #define MC13783_REG_SWITCHERS1_SW1BVSEL                 0
  34 #define MC13783_REG_SWITCHERS1_SW1BVSEL_M               (63 << 0)
  35
  36 #define MC13783_REG_SWITCHERS2                  26
  37 /* Enable does not exist for SW2A */
  38 #define MC13783_REG_SWITCHERS2_SW2AEN                   0
  39 #define MC13783_REG_SWITCHERS2_SW2AVSEL                 0
  40 #define MC13783_REG_SWITCHERS2_SW2AVSEL_M               (63 << 0)
  41
  42 #define MC13783_REG_SWITCHERS3                  27
  43 /* Enable does not exist for SW2B */
  44 #define MC13783_REG_SWITCHERS3_SW2BEN                   0
  45 #define MC13783_REG_SWITCHERS3_SW2BVSEL                 0
  46 #define MC13783_REG_SWITCHERS3_SW2BVSEL_M               (63 << 0)
  47
  48 #define MC13783_REG_SWITCHERS5                  29
  49 #define MC13783_REG_SWITCHERS5_SW3EN                    (1 << 20)
  50 #define MC13783_REG_SWITCHERS5_SW3VSEL                  18
  51 #define MC13783_REG_SWITCHERS5_SW3VSEL_M                (3 << 18)
  52
  53 #define MC13783_REG_REGULATORSETTING0           30
  54 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL         2
  55 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL          4
  56 #define MC13783_REG_REGULATORSETTING0_VGENVSEL          6
  57 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL        9
  58 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL        11
  59 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL         13
  60 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL          14
  61 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL         15
  62 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL          16
  63
  64 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M       (3 << 2)
  65 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M        (3 << 4)
  66 #define MC13783_REG_REGULATORSETTING0_VGENVSEL_M        (7 << 6)
  67 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M      (3 << 9)
  68 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M      (3 << 11)
  69 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M       (1 << 13)
  70 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M        (1 << 14)
  71 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M       (1 << 15)
  72 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M        (7 << 16)
  73
  74 #define MC13783_REG_REGULATORSETTING1           31
  75 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL          0
  76 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL          2
  77 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL          4
  78 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL         6
  79 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL         9
  80
  81 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M        (3 << 0)
  82 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M        (3 << 2)
  83 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M        (3 << 4)
  84 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M       (7 << 6)
  85 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M       (7 << 9)
  86
  87 #define MC13783_REG_REGULATORMODE0              32
  88 #define MC13783_REG_REGULATORMODE0_VAUDIOEN             (1 << 0)
  89 #define MC13783_REG_REGULATORMODE0_VIOHIEN              (1 << 3)
  90 #define MC13783_REG_REGULATORMODE0_VIOLOEN              (1 << 6)
  91 #define MC13783_REG_REGULATORMODE0_VDIGEN               (1 << 9)
  92 #define MC13783_REG_REGULATORMODE0_VGENEN               (1 << 12)
  93 #define MC13783_REG_REGULATORMODE0_VRFDIGEN             (1 << 15)
  94 #define MC13783_REG_REGULATORMODE0_VRFREFEN             (1 << 18)
  95 #define MC13783_REG_REGULATORMODE0_VRFCPEN              (1 << 21)
  96
  97 #define MC13783_REG_REGULATORMODE1              33
  98 #define MC13783_REG_REGULATORMODE1_VSIMEN               (1 << 0)
  99 #define MC13783_REG_REGULATORMODE1_VESIMEN              (1 << 3)
 100 #define MC13783_REG_REGULATORMODE1_VCAMEN               (1 << 6)
 101 #define MC13783_REG_REGULATORMODE1_VRFBGEN              (1 << 9)
 102 #define MC13783_REG_REGULATORMODE1_VVIBEN               (1 << 11)
 103 #define MC13783_REG_REGULATORMODE1_VRF1EN               (1 << 12)
 104 #define MC13783_REG_REGULATORMODE1_VRF2EN               (1 << 15)
 105 #define MC13783_REG_REGULATORMODE1_VMMC1EN              (1 << 18)
 106 #define MC13783_REG_REGULATORMODE1_VMMC2EN              (1 << 21)
 107
 108 #define MC13783_REG_POWERMISC                   34
 109 #define MC13783_REG_POWERMISC_GPO1EN                    (1 << 6)
 110 #define MC13783_REG_POWERMISC_GPO2EN                    (1 << 8)
 111 #define MC13783_REG_POWERMISC_GPO3EN                    (1 << 10)
 112 #define MC13783_REG_POWERMISC_GPO4EN                    (1 << 12)
 113 #define MC13783_REG_POWERMISC_PWGT1SPIEN                (1 << 15)
 114 #define MC13783_REG_POWERMISC_PWGT2SPIEN                (1 << 16)
 115
 116 #define MC13783_REG_POWERMISC_PWGTSPI_M                 (3 << 15)
 117
 118
 119 /* Voltage Values */
 120 static const int mc13783_sw1x_val[] = {
 121         900000, 925000, 950000, 975000,
 122         1000000, 1025000, 1050000, 1075000,
 123         1100000, 1125000, 1150000, 1175000,
 124         1200000, 1225000, 1250000, 1275000,
 125         1300000, 1325000, 1350000, 1375000,
 126         1400000, 1425000, 1450000, 1475000,
 127         1500000, 1525000, 1550000, 1575000,
 128         1600000, 1625000, 1650000, 1675000,
 129         1700000, 1700000, 1700000, 1700000,
 130         1800000, 1800000, 1800000, 1800000,
 131         1850000, 1850000, 1850000, 1850000,
 132         2000000, 2000000, 2000000, 2000000,
 133         2100000, 2100000, 2100000, 2100000,
 134         2200000, 2200000, 2200000, 2200000,
 135         2200000, 2200000, 2200000, 2200000,
 136         2200000, 2200000, 2200000, 2200000,
 137 };
 138
 139 static const int mc13783_sw2x_val[] = {
 140         900000, 925000, 950000, 975000,
 141         1000000, 1025000, 1050000, 1075000,
 142         1100000, 1125000, 1150000, 1175000,
 143         1200000, 1225000, 1250000, 1275000,
 144         1300000, 1325000, 1350000, 1375000,
 145         1400000, 1425000, 1450000, 1475000,
 146         1500000, 1525000, 1550000, 1575000,
 147         1600000, 1625000, 1650000, 1675000,
 148         1700000, 1700000, 1700000, 1700000,
 149         1800000, 1800000, 1800000, 1800000,
 150         1900000, 1900000, 1900000, 1900000,
 151         2000000, 2000000, 2000000, 2000000,
 152         2100000, 2100000, 2100000, 2100000,
 153         2200000, 2200000, 2200000, 2200000,
 154         2200000, 2200000, 2200000, 2200000,
 155         2200000, 2200000, 2200000, 2200000,
 156 };
 157
 158 static const unsigned int mc13783_sw3_val[] = {
 159         5000000, 5000000, 5000000, 5500000,
 160 };
 161
 162 static const unsigned int mc13783_vaudio_val[] = {
 163         2775000,
 164 };
 165
 166 static const unsigned int mc13783_viohi_val[] = {
 167         2775000,
 168 };
 169
 170 static const unsigned int mc13783_violo_val[] = {
 171         1200000, 1300000, 1500000, 1800000,
 172 };
 173
 174 static const unsigned int mc13783_vdig_val[] = {
 175         1200000, 1300000, 1500000, 1800000,
 176 };
 177
 178 static const unsigned int mc13783_vgen_val[] = {
 179         1200000, 1300000, 1500000, 1800000,
 180         1100000, 2000000, 2775000, 2400000,
 181 };
 182
 183 static const unsigned int mc13783_vrfdig_val[] = {
 184         1200000, 1500000, 1800000, 1875000,
 185 };
 186
 187 static const unsigned int mc13783_vrfref_val[] = {
 188         2475000, 2600000, 2700000, 2775000,
 189 };
 190
 191 static const unsigned int mc13783_vrfcp_val[] = {
 192         2700000, 2775000,
 193 };
 194
 195 static const unsigned int mc13783_vsim_val[] = {
 196         1800000, 2900000, 3000000,
 197 };
 198
 199 static const unsigned int mc13783_vesim_val[] = {
 200         1800000, 2900000,
 201 };
 202
 203 static const unsigned int mc13783_vcam_val[] = {
 204         1500000, 1800000, 2500000, 2550000,
 205         2600000, 2750000, 2800000, 3000000,
 206 };
 207
 208 static const unsigned int mc13783_vrfbg_val[] = {
 209         1250000,
 210 };
 211
 212 static const unsigned int mc13783_vvib_val[] = {
 213         1300000, 1800000, 2000000, 3000000,
 214 };
 215
 216 static const unsigned int mc13783_vmmc_val[] = {
 217         1600000, 1800000, 2000000, 2600000,
 218         2700000, 2800000, 2900000, 3000000,
 219 };
 220
 221 static const unsigned int mc13783_vrf_val[] = {
 222         1500000, 1875000, 2700000, 2775000,
 223 };
 224
 225 static const unsigned int mc13783_gpo_val[] = {
 226         3100000,
 227 };
 228
 229 static const unsigned int mc13783_pwgtdrv_val[] = {
 230         5500000,
 231 };
 232
 233 static struct regulator_ops mc13783_gpo_regulator_ops;
 234
 235 #define MC13783_DEFINE(prefix, name, reg, vsel_reg, voltages)   \
 236         MC13xxx_DEFINE(MC13783_REG_, name, reg, vsel_reg, voltages, \
 237                         mc13xxx_regulator_ops)
 238
 239 #define MC13783_FIXED_DEFINE(prefix, name, reg, voltages)               \
 240         MC13xxx_FIXED_DEFINE(MC13783_REG_, name, reg, voltages, \
 241                         mc13xxx_fixed_regulator_ops)
 242
 243 #define MC13783_GPO_DEFINE(prefix, name, reg, voltages)         \
 244         MC13xxx_GPO_DEFINE(MC13783_REG_, name, reg, voltages, \
 245                         mc13783_gpo_regulator_ops)
 246
 247 #define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages)            \
 248         MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)
 249 #define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages)          \
 250         MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages)
 251
 252 static struct mc13xxx_regulator mc13783_regulators[] = {
 253         MC13783_DEFINE_SW(SW1A, SWITCHERS0, SWITCHERS0, mc13783_sw1x_val),
 254         MC13783_DEFINE_SW(SW1B, SWITCHERS1, SWITCHERS1, mc13783_sw1x_val),
 255         MC13783_DEFINE_SW(SW2A, SWITCHERS2, SWITCHERS2, mc13783_sw2x_val),
 256         MC13783_DEFINE_SW(SW2B, SWITCHERS3, SWITCHERS3, mc13783_sw2x_val),
 257         MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),
 258
 259         MC13783_FIXED_DEFINE(REG, VAUDIO, REGULATORMODE0, mc13783_vaudio_val),
 260         MC13783_FIXED_DEFINE(REG, VIOHI, REGULATORMODE0, mc13783_viohi_val),
 261         MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0,   \
 262                             mc13783_violo_val),
 263         MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0,    \
 264                             mc13783_vdig_val),
 265         MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0,    \
 266                             mc13783_vgen_val),
 267         MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0,  \
 268                             mc13783_vrfdig_val),
 269         MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0,  \
 270                             mc13783_vrfref_val),
 271         MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0,   \
 272                             mc13783_vrfcp_val),
 273         MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0,    \
 274                             mc13783_vsim_val),
 275         MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0,   \
 276                             mc13783_vesim_val),
 277         MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0,    \
 278                             mc13783_vcam_val),
 279         MC13783_FIXED_DEFINE(REG, VRFBG, REGULATORMODE1, mc13783_vrfbg_val),
 280         MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1,    \
 281                             mc13783_vvib_val),
 282         MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1,    \
 283                             mc13783_vrf_val),
 284         MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1,    \
 285                             mc13783_vrf_val),
 286         MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1,   \
 287                             mc13783_vmmc_val),
 288         MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1,   \
 289                             mc13783_vmmc_val),
 290         MC13783_GPO_DEFINE(REG, GPO1, POWERMISC, mc13783_gpo_val),
 291         MC13783_GPO_DEFINE(REG, GPO2, POWERMISC, mc13783_gpo_val),
 292         MC13783_GPO_DEFINE(REG, GPO3, POWERMISC, mc13783_gpo_val),
 293         MC13783_GPO_DEFINE(REG, GPO4, POWERMISC, mc13783_gpo_val),
 294         MC13783_GPO_DEFINE(REG, PWGT1SPI, POWERMISC, mc13783_pwgtdrv_val),
 295         MC13783_GPO_DEFINE(REG, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val),
 296 };
 297
 298 static int mc13783_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask,
 299                 u32 val)
 300 {
 301         struct mc13xxx *mc13783 = priv->mc13xxx;
 302         int ret;
 303         u32 valread;
 304
 305         BUG_ON(val & ~mask);
 306
 307         mc13xxx_lock(priv->mc13xxx);
 308         ret = mc13xxx_reg_read(mc13783, MC13783_REG_POWERMISC, &valread);
 309         if (ret)
 310                 goto out;
 311
 312         /* Update the stored state for Power Gates. */
 313         priv->powermisc_pwgt_state =
 314                                 (priv->powermisc_pwgt_state & ~mask) | val;
 315         priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M;
 316
 317         /* Construct the new register value */
 318         valread = (valread & ~mask) | val;
 319         /* Overwrite the PWGTxEN with the stored version */
 320         valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
 321                                                 priv->powermisc_pwgt_state;
 322
 323         ret = mc13xxx_reg_write(mc13783, MC13783_REG_POWERMISC, valread);
 324 out:
 325         mc13xxx_unlock(priv->mc13xxx);
 326         return ret;
 327 }
 328
 329 static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)
 330 {
 331         struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
 332         struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
 333         int id = rdev_get_id(rdev);
 334         u32 en_val = mc13xxx_regulators[id].enable_bit;
 335
 336         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 337
 338         /* Power Gate enable value is 0 */
 339         if (id == MC13783_REG_PWGT1SPI ||
 340             id == MC13783_REG_PWGT2SPI)
 341                 en_val = 0;
 342
 343         return mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
 344                                         en_val);
 345 }
 346
 347 static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)
 348 {
 349         struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
 350         struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
 351         int id = rdev_get_id(rdev);
 352         u32 dis_val = 0;
 353
 354         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 355
 356         /* Power Gate disable value is 1 */
 357         if (id == MC13783_REG_PWGT1SPI ||
 358             id == MC13783_REG_PWGT2SPI)
 359                 dis_val = mc13xxx_regulators[id].enable_bit;
 360
 361         return mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
 362                                         dis_val);
 363 }
 364
 365 static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev)
 366 {
 367         struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
 368         struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
 369         int ret, id = rdev_get_id(rdev);
 370         unsigned int val;
 371
 372         mc13xxx_lock(priv->mc13xxx);
 373         ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val);
 374         mc13xxx_unlock(priv->mc13xxx);
 375
 376         if (ret)
 377                 return ret;
 378
 379         /* Power Gates state is stored in powermisc_pwgt_state
 380          * where the meaning of bits is negated */
 381         val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
 382               (priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M);
 383
 384         return (val & mc13xxx_regulators[id].enable_bit) != 0;
 385 }
 386
 387 static struct regulator_ops mc13783_gpo_regulator_ops = {
 388         .enable = mc13783_gpo_regulator_enable,
 389         .disable = mc13783_gpo_regulator_disable,
 390         .is_enabled = mc13783_gpo_regulator_is_enabled,
 391         .list_voltage = regulator_list_voltage_table,
 392         .set_voltage = mc13xxx_fixed_regulator_set_voltage,
 393 };
 394
 395 static int mc13783_regulator_probe(struct platform_device *pdev)
 396 {
 397         struct mc13xxx_regulator_priv *priv;
 398         struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
 399         struct mc13xxx_regulator_platform_data *pdata =
 400                 dev_get_platdata(&pdev->dev);
 401         struct mc13xxx_regulator_init_data *mc13xxx_data;
 402         struct regulator_config config = { };
 403         int i, ret, num_regulators;
 404
 405         num_regulators = mc13xxx_get_num_regulators_dt(pdev);
 406
 407         if (num_regulators <= 0 && pdata)
 408                 num_regulators = pdata->num_regulators;
 409         if (num_regulators <= 0)
 410                 return -EINVAL;
 411
 412         priv = devm_kzalloc(&pdev->dev, sizeof(*priv) +
 413                         num_regulators * sizeof(priv->regulators[0]),
 414                         GFP_KERNEL);
 415         if (!priv)
 416                 return -ENOMEM;
 417
 418         priv->num_regulators = num_regulators;
 419         priv->mc13xxx_regulators = mc13783_regulators;
 420         priv->mc13xxx = mc13783;
 421         platform_set_drvdata(pdev, priv);
 422
 423         mc13xxx_data = mc13xxx_parse_regulators_dt(pdev, mc13783_regulators,
 424                                         ARRAY_SIZE(mc13783_regulators));
 425
 426         for (i = 0; i < priv->num_regulators; i++) {
 427                 struct regulator_init_data *init_data;
 428                 struct regulator_desc *desc;
 429                 struct device_node *node = NULL;
 430                 int id;
 431
 432                 if (mc13xxx_data) {
 433                         id = mc13xxx_data[i].id;
 434                         init_data = mc13xxx_data[i].init_data;
 435                         node = mc13xxx_data[i].node;
 436                 } else {
 437                         id = pdata->regulators[i].id;
 438                         init_data = pdata->regulators[i].init_data;
 439                 }
 440                 desc = &mc13783_regulators[id].desc;
 441
 442                 config.dev = &pdev->dev;
 443                 config.init_data = init_data;
 444                 config.driver_data = priv;
 445                 config.of_node = node;
 446
 447                 priv->regulators[i] = regulator_register(desc, &config);
 448                 if (IS_ERR(priv->regulators[i])) {
 449                         dev_err(&pdev->dev, "failed to register regulator %s\n",
 450                                 mc13783_regulators[i].desc.name);
 451                         ret = PTR_ERR(priv->regulators[i]);
 452                         goto err;
 453                 }
 454         }
 455
 456         return 0;
 457 err:
 458         while (--i >= 0)
 459                 regulator_unregister(priv->regulators[i]);
 460
 461         return ret;
 462 }
 463
 464 static int mc13783_regulator_remove(struct platform_device *pdev)
 465 {
 466         struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
 467         int i;
 468
 469         for (i = 0; i < priv->num_regulators; i++)
 470                 regulator_unregister(priv->regulators[i]);
 471
 472         return 0;
 473 }
 474
 475 static struct platform_driver mc13783_regulator_driver = {
 476         .driver = {
 477                 .name   = "mc13783-regulator",
 478                 .owner  = THIS_MODULE,
 479         },
 480         .remove         = mc13783_regulator_remove,
 481         .probe          = mc13783_regulator_probe,
 482 };
 483
 484 static int __init mc13783_regulator_init(void)
 485 {
 486         return platform_driver_register(&mc13783_regulator_driver);
 487 }
 488 subsys_initcall(mc13783_regulator_init);
 489
 490 static void __exit mc13783_regulator_exit(void)
 491 {
 492         platform_driver_unregister(&mc13783_regulator_driver);
 493 }
 494 module_exit(mc13783_regulator_exit);
 495
 496 MODULE_LICENSE("GPL v2");
 497 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
 498 MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
 499 MODULE_ALIAS("platform:mc13783-regulator");