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