drivers/regulator/pfuze100-regulator.c

   1 /*
   2  * Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  17  */
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/init.h>
  21 #include <linux/err.h>
  22 #include <linux/of.h>
  23 #include <linux/of_device.h>
  24 #include <linux/regulator/of_regulator.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/regulator/driver.h>
  27 #include <linux/regulator/machine.h>
  28 #include <linux/regulator/pfuze100.h>
  29 #include <linux/i2c.h>
  30 #include <linux/slab.h>
  31 #include <linux/regmap.h>
  32
  33 #define PFUZE_NUMREGS           128
  34 #define PFUZE100_VOL_OFFSET     0
  35 #define PFUZE100_STANDBY_OFFSET 1
  36 #define PFUZE100_MODE_OFFSET    3
  37 #define PFUZE100_CONF_OFFSET    4
  38
  39 #define PFUZE100_DEVICEID       0x0
  40 #define PFUZE100_REVID          0x3
  41 #define PFUZE100_FABID          0x4
  42
  43 #define PFUZE100_COINVOL        0x1a
  44 #define PFUZE100_SW1ABVOL       0x20
  45 #define PFUZE100_SW1CVOL        0x2e
  46 #define PFUZE100_SW2VOL         0x35
  47 #define PFUZE100_SW3AVOL        0x3c
  48 #define PFUZE100_SW3BVOL        0x43
  49 #define PFUZE100_SW4VOL         0x4a
  50 #define PFUZE100_SWBSTCON1      0x66
  51 #define PFUZE100_VREFDDRCON     0x6a
  52 #define PFUZE100_VSNVSVOL       0x6b
  53 #define PFUZE100_VGEN1VOL       0x6c
  54 #define PFUZE100_VGEN2VOL       0x6d
  55 #define PFUZE100_VGEN3VOL       0x6e
  56 #define PFUZE100_VGEN4VOL       0x6f
  57 #define PFUZE100_VGEN5VOL       0x70
  58 #define PFUZE100_VGEN6VOL       0x71
  59
  60 enum chips { PFUZE100, PFUZE200, PFUZE3000 = 3 };
  61
  62 struct pfuze_regulator {
  63         struct regulator_desc desc;
  64         unsigned char stby_reg;
  65         unsigned char stby_mask;
  66 };
  67
  68 struct pfuze_chip {
  69         int     chip_id;
  70         struct regmap *regmap;
  71         struct device *dev;
  72         struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
  73         struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
  74         struct pfuze_regulator *pfuze_regulators;
  75 };
  76
  77 static const int pfuze100_swbst[] = {
  78         5000000, 5050000, 5100000, 5150000,
  79 };
  80
  81 static const int pfuze100_vsnvs[] = {
  82         1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,
  83 };
  84
  85 static const int pfuze100_coin[] = {
  86         2500000, 2700000, 2800000, 2900000, 3000000, 3100000, 3200000, 3300000,
  87 };
  88
  89 static const int pfuze3000_sw2lo[] = {
  90         1500000, 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000,
  91 };
  92
  93 static const int pfuze3000_sw2hi[] = {
  94         2500000, 2800000, 2850000, 3000000, 3100000, 3150000, 3200000, 3300000,
  95 };
  96
  97 static const struct i2c_device_id pfuze_device_id[] = {
  98         {.name = "pfuze100", .driver_data = PFUZE100},
  99         {.name = "pfuze200", .driver_data = PFUZE200},
 100         {.name = "pfuze3000", .driver_data = PFUZE3000},
 101         { }
 102 };
 103 MODULE_DEVICE_TABLE(i2c, pfuze_device_id);
 104
 105 static const struct of_device_id pfuze_dt_ids[] = {
 106         { .compatible = "fsl,pfuze100", .data = (void *)PFUZE100},
 107         { .compatible = "fsl,pfuze200", .data = (void *)PFUZE200},
 108         { .compatible = "fsl,pfuze3000", .data = (void *)PFUZE3000},
 109         { }
 110 };
 111 MODULE_DEVICE_TABLE(of, pfuze_dt_ids);
 112
 113 static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 114 {
 115         struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
 116         int id = rdev_get_id(rdev);
 117         unsigned int ramp_bits;
 118         int ret;
 119
 120         if (id < PFUZE100_SWBST) {
 121                 ramp_delay = 12500 / ramp_delay;
 122                 ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
 123                 ret = regmap_update_bits(pfuze100->regmap,
 124                                          rdev->desc->vsel_reg + 4,
 125                                          0xc0, ramp_bits << 6);
 126                 if (ret < 0)
 127                         dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
 128         } else
 129                 ret = -EACCES;
 130
 131         return ret;
 132 }
 133
 134 static const struct regulator_ops pfuze100_ldo_regulator_ops = {
 135         .enable = regulator_enable_regmap,
 136         .disable = regulator_disable_regmap,
 137         .is_enabled = regulator_is_enabled_regmap,
 138         .list_voltage = regulator_list_voltage_linear,
 139         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 140         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 141 };
 142
 143 static const struct regulator_ops pfuze100_fixed_regulator_ops = {
 144         .enable = regulator_enable_regmap,
 145         .disable = regulator_disable_regmap,
 146         .is_enabled = regulator_is_enabled_regmap,
 147         .list_voltage = regulator_list_voltage_linear,
 148 };
 149
 150 static const struct regulator_ops pfuze100_sw_regulator_ops = {
 151         .list_voltage = regulator_list_voltage_linear,
 152         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 153         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 154         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 155         .set_ramp_delay = pfuze100_set_ramp_delay,
 156 };
 157
 158 static const struct regulator_ops pfuze100_swb_regulator_ops = {
 159         .enable = regulator_enable_regmap,
 160         .disable = regulator_disable_regmap,
 161         .is_enabled = regulator_is_enabled_regmap,
 162         .list_voltage = regulator_list_voltage_table,
 163         .map_voltage = regulator_map_voltage_ascend,
 164         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 165         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 166
 167 };
 168
 169 #define PFUZE100_FIXED_REG(_chip, _name, base, voltage) \
 170         [_chip ## _ ## _name] = {       \
 171                 .desc = {       \
 172                         .name = #_name, \
 173                         .n_voltages = 1,        \
 174                         .ops = &pfuze100_fixed_regulator_ops,   \
 175                         .type = REGULATOR_VOLTAGE,      \
 176                         .id = _chip ## _ ## _name,      \
 177                         .owner = THIS_MODULE,   \
 178                         .min_uV = (voltage),    \
 179                         .enable_reg = (base),   \
 180                         .enable_mask = 0x10,    \
 181                 },      \
 182         }
 183
 184 #define PFUZE100_SW_REG(_chip, _name, base, min, max, step)     \
 185         [_chip ## _ ## _name] = {       \
 186                 .desc = {       \
 187                         .name = #_name,\
 188                         .n_voltages = ((max) - (min)) / (step) + 1,     \
 189                         .ops = &pfuze100_sw_regulator_ops,      \
 190                         .type = REGULATOR_VOLTAGE,      \
 191                         .id = _chip ## _ ## _name,      \
 192                         .owner = THIS_MODULE,   \
 193                         .min_uV = (min),        \
 194                         .uV_step = (step),      \
 195                         .vsel_reg = (base) + PFUZE100_VOL_OFFSET,       \
 196                         .vsel_mask = 0x3f,      \
 197                 },      \
 198                 .stby_reg = (base) + PFUZE100_STANDBY_OFFSET,   \
 199                 .stby_mask = 0x3f,      \
 200         }
 201
 202 #define PFUZE100_SWB_REG(_chip, _name, base, mask, voltages)    \
 203         [_chip ## _ ##  _name] = {      \
 204                 .desc = {       \
 205                         .name = #_name, \
 206                         .n_voltages = ARRAY_SIZE(voltages),     \
 207                         .ops = &pfuze100_swb_regulator_ops,     \
 208                         .type = REGULATOR_VOLTAGE,      \
 209                         .id = _chip ## _ ## _name,      \
 210                         .owner = THIS_MODULE,   \
 211                         .volt_table = voltages, \
 212                         .vsel_reg = (base),     \
 213                         .vsel_mask = (mask),    \
 214                         .enable_reg = (base),   \
 215                         .enable_mask = 0x48,    \
 216                 },      \
 217         }
 218
 219 #define PFUZE100_VGEN_REG(_chip, _name, base, min, max, step)   \
 220         [_chip ## _ ## _name] = {       \
 221                 .desc = {       \
 222                         .name = #_name, \
 223                         .n_voltages = ((max) - (min)) / (step) + 1,     \
 224                         .ops = &pfuze100_ldo_regulator_ops,     \
 225                         .type = REGULATOR_VOLTAGE,      \
 226                         .id = _chip ## _ ## _name,      \
 227                         .owner = THIS_MODULE,   \
 228                         .min_uV = (min),        \
 229                         .uV_step = (step),      \
 230                         .vsel_reg = (base),     \
 231                         .vsel_mask = 0xf,       \
 232                         .enable_reg = (base),   \
 233                         .enable_mask = 0x10,    \
 234                 },      \
 235                 .stby_reg = (base),     \
 236                 .stby_mask = 0x20,      \
 237         }
 238
 239 #define PFUZE100_COIN_REG(_chip, _name, base, mask, voltages)   \
 240         [_chip ## _ ##  _name] = {      \
 241                 .desc = {       \
 242                         .name = #_name, \
 243                         .n_voltages = ARRAY_SIZE(voltages),     \
 244                         .ops = &pfuze100_swb_regulator_ops,     \
 245                         .type = REGULATOR_VOLTAGE,      \
 246                         .id = _chip ## _ ## _name,      \
 247                         .owner = THIS_MODULE,   \
 248                         .volt_table = voltages, \
 249                         .vsel_reg = (base),     \
 250                         .vsel_mask = (mask),    \
 251                         .enable_reg = (base),   \
 252                         .enable_mask = 0x8,     \
 253                 },      \
 254         }
 255
 256 #define PFUZE3000_VCC_REG(_chip, _name, base, min, max, step)   {       \
 257         .desc = {       \
 258                 .name = #_name, \
 259                 .n_voltages = ((max) - (min)) / (step) + 1,     \
 260                 .ops = &pfuze100_ldo_regulator_ops,     \
 261                 .type = REGULATOR_VOLTAGE,      \
 262                 .id = _chip ## _ ## _name,      \
 263                 .owner = THIS_MODULE,   \
 264                 .min_uV = (min),        \
 265                 .uV_step = (step),      \
 266                 .vsel_reg = (base),     \
 267                 .vsel_mask = 0x3,       \
 268                 .enable_reg = (base),   \
 269                 .enable_mask = 0x10,    \
 270         },      \
 271         .stby_reg = (base),     \
 272         .stby_mask = 0x20,      \
 273 }
 274
 275
 276 #define PFUZE3000_SW2_REG(_chip, _name, base, min, max, step)   {       \
 277         .desc = {       \
 278                 .name = #_name,\
 279                 .n_voltages = ((max) - (min)) / (step) + 1,     \
 280                 .ops = &pfuze100_sw_regulator_ops,      \
 281                 .type = REGULATOR_VOLTAGE,      \
 282                 .id = _chip ## _ ## _name,      \
 283                 .owner = THIS_MODULE,   \
 284                 .min_uV = (min),        \
 285                 .uV_step = (step),      \
 286                 .vsel_reg = (base) + PFUZE100_VOL_OFFSET,       \
 287                 .vsel_mask = 0x7,       \
 288         },      \
 289         .stby_reg = (base) + PFUZE100_STANDBY_OFFSET,   \
 290         .stby_mask = 0x7,       \
 291 }
 292
 293 #define PFUZE3000_SW3_REG(_chip, _name, base, min, max, step)   {       \
 294         .desc = {       \
 295                 .name = #_name,\
 296                 .n_voltages = ((max) - (min)) / (step) + 1,     \
 297                 .ops = &pfuze100_sw_regulator_ops,      \
 298                 .type = REGULATOR_VOLTAGE,      \
 299                 .id = _chip ## _ ## _name,      \
 300                 .owner = THIS_MODULE,   \
 301                 .min_uV = (min),        \
 302                 .uV_step = (step),      \
 303                 .vsel_reg = (base) + PFUZE100_VOL_OFFSET,       \
 304                 .vsel_mask = 0xf,       \
 305         },      \
 306         .stby_reg = (base) + PFUZE100_STANDBY_OFFSET,   \
 307         .stby_mask = 0xf,       \
 308 }
 309
 310 /* PFUZE100 */
 311 static struct pfuze_regulator pfuze100_regulators[] = {
 312         PFUZE100_SW_REG(PFUZE100, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
 313         PFUZE100_SW_REG(PFUZE100, SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000),
 314         PFUZE100_SW_REG(PFUZE100, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
 315         PFUZE100_SW_REG(PFUZE100, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
 316         PFUZE100_SW_REG(PFUZE100, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
 317         PFUZE100_SW_REG(PFUZE100, SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000),
 318         PFUZE100_SWB_REG(PFUZE100, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
 319         PFUZE100_SWB_REG(PFUZE100, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
 320         PFUZE100_FIXED_REG(PFUZE100, VREFDDR, PFUZE100_VREFDDRCON, 750000),
 321         PFUZE100_VGEN_REG(PFUZE100, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
 322         PFUZE100_VGEN_REG(PFUZE100, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
 323         PFUZE100_VGEN_REG(PFUZE100, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
 324         PFUZE100_VGEN_REG(PFUZE100, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
 325         PFUZE100_VGEN_REG(PFUZE100, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
 326         PFUZE100_VGEN_REG(PFUZE100, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
 327 };
 328
 329 static struct pfuze_regulator pfuze200_regulators[] = {
 330         PFUZE100_SW_REG(PFUZE200, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
 331         PFUZE100_SW_REG(PFUZE200, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
 332         PFUZE100_SW_REG(PFUZE200, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
 333         PFUZE100_SW_REG(PFUZE200, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
 334         PFUZE100_SWB_REG(PFUZE200, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
 335         PFUZE100_SWB_REG(PFUZE200, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
 336         PFUZE100_FIXED_REG(PFUZE200, VREFDDR, PFUZE100_VREFDDRCON, 750000),
 337         PFUZE100_VGEN_REG(PFUZE200, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
 338         PFUZE100_VGEN_REG(PFUZE200, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
 339         PFUZE100_VGEN_REG(PFUZE200, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
 340         PFUZE100_VGEN_REG(PFUZE200, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
 341         PFUZE100_VGEN_REG(PFUZE200, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
 342         PFUZE100_VGEN_REG(PFUZE200, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
 343         PFUZE100_COIN_REG(PFUZE200, COIN, PFUZE100_COINVOL, 0x7, pfuze100_coin),
 344 };
 345
 346 static struct pfuze_regulator pfuze3000_regulators[] = {
 347         PFUZE100_SW_REG(PFUZE3000, SW1A, PFUZE100_SW1ABVOL, 700000, 1475000, 25000),
 348         PFUZE100_SW_REG(PFUZE3000, SW1B, PFUZE100_SW1CVOL, 700000, 1475000, 25000),
 349         PFUZE100_SWB_REG(PFUZE3000, SW2, PFUZE100_SW2VOL, 0x7, pfuze3000_sw2lo),
 350         PFUZE3000_SW3_REG(PFUZE3000, SW3, PFUZE100_SW3AVOL, 900000, 1650000, 50000),
 351         PFUZE100_SWB_REG(PFUZE3000, SWBST, PFUZE100_SWBSTCON1, 0x3, pfuze100_swbst),
 352         PFUZE100_SWB_REG(PFUZE3000, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
 353         PFUZE100_FIXED_REG(PFUZE3000, VREFDDR, PFUZE100_VREFDDRCON, 750000),
 354         PFUZE100_VGEN_REG(PFUZE3000, VLDO1, PFUZE100_VGEN1VOL, 1800000, 3300000, 100000),
 355         PFUZE100_VGEN_REG(PFUZE3000, VLDO2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
 356         PFUZE3000_VCC_REG(PFUZE3000, VCCSD, PFUZE100_VGEN3VOL, 2850000, 3300000, 150000),
 357         PFUZE3000_VCC_REG(PFUZE3000, V33, PFUZE100_VGEN4VOL, 2850000, 3300000, 150000),
 358         PFUZE100_VGEN_REG(PFUZE3000, VLDO3, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
 359         PFUZE100_VGEN_REG(PFUZE3000, VLDO4, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
 360 };
 361
 362 #ifdef CONFIG_OF
 363 /* PFUZE100 */
 364 static struct of_regulator_match pfuze100_matches[] = {
 365         { .name = "sw1ab",      },
 366         { .name = "sw1c",       },
 367         { .name = "sw2",        },
 368         { .name = "sw3a",       },
 369         { .name = "sw3b",       },
 370         { .name = "sw4",        },
 371         { .name = "swbst",      },
 372         { .name = "vsnvs",      },
 373         { .name = "vrefddr",    },
 374         { .name = "vgen1",      },
 375         { .name = "vgen2",      },
 376         { .name = "vgen3",      },
 377         { .name = "vgen4",      },
 378         { .name = "vgen5",      },
 379         { .name = "vgen6",      },
 380 };
 381
 382 /* PFUZE200 */
 383 static struct of_regulator_match pfuze200_matches[] = {
 384
 385         { .name = "sw1ab",      },
 386         { .name = "sw2",        },
 387         { .name = "sw3a",       },
 388         { .name = "sw3b",       },
 389         { .name = "swbst",      },
 390         { .name = "vsnvs",      },
 391         { .name = "vrefddr",    },
 392         { .name = "vgen1",      },
 393         { .name = "vgen2",      },
 394         { .name = "vgen3",      },
 395         { .name = "vgen4",      },
 396         { .name = "vgen5",      },
 397         { .name = "vgen6",      },
 398         { .name = "coin",       },
 399 };
 400
 401 /* PFUZE3000 */
 402 static struct of_regulator_match pfuze3000_matches[] = {
 403
 404         { .name = "sw1a",       },
 405         { .name = "sw1b",       },
 406         { .name = "sw2",        },
 407         { .name = "sw3",        },
 408         { .name = "swbst",      },
 409         { .name = "vsnvs",      },
 410         { .name = "vrefddr",    },
 411         { .name = "vldo1",      },
 412         { .name = "vldo2",      },
 413         { .name = "vccsd",      },
 414         { .name = "v33",        },
 415         { .name = "vldo3",      },
 416         { .name = "vldo4",      },
 417 };
 418
 419 static struct of_regulator_match *pfuze_matches;
 420
 421 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
 422 {
 423         struct device *dev = chip->dev;
 424         struct device_node *np, *parent;
 425         int ret;
 426
 427         np = of_node_get(dev->of_node);
 428         if (!np)
 429                 return -EINVAL;
 430
 431         parent = of_get_child_by_name(np, "regulators");
 432         if (!parent) {
 433                 dev_err(dev, "regulators node not found\n");
 434                 of_node_put(np);
 435                 return -EINVAL;
 436         }
 437
 438         switch (chip->chip_id) {
 439         case PFUZE3000:
 440                 pfuze_matches = pfuze3000_matches;
 441                 ret = of_regulator_match(dev, parent, pfuze3000_matches,
 442                                          ARRAY_SIZE(pfuze3000_matches));
 443                 break;
 444         case PFUZE200:
 445                 pfuze_matches = pfuze200_matches;
 446                 ret = of_regulator_match(dev, parent, pfuze200_matches,
 447                                          ARRAY_SIZE(pfuze200_matches));
 448                 break;
 449
 450         case PFUZE100:
 451         default:
 452                 pfuze_matches = pfuze100_matches;
 453                 ret = of_regulator_match(dev, parent, pfuze100_matches,
 454                                          ARRAY_SIZE(pfuze100_matches));
 455                 break;
 456         }
 457
 458         of_node_put(parent);
 459         of_node_put(np);
 460         if (ret < 0) {
 461                 dev_err(dev, "Error parsing regulator init data: %d\n",
 462                         ret);
 463                 return ret;
 464         }
 465
 466         return 0;
 467 }
 468
 469 static inline struct regulator_init_data *match_init_data(int index)
 470 {
 471         return pfuze_matches[index].init_data;
 472 }
 473
 474 static inline struct device_node *match_of_node(int index)
 475 {
 476         return pfuze_matches[index].of_node;
 477 }
 478 #else
 479 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
 480 {
 481         return 0;
 482 }
 483
 484 static inline struct regulator_init_data *match_init_data(int index)
 485 {
 486         return NULL;
 487 }
 488
 489 static inline struct device_node *match_of_node(int index)
 490 {
 491         return NULL;
 492 }
 493 #endif
 494
 495 static int pfuze_identify(struct pfuze_chip *pfuze_chip)
 496 {
 497         unsigned int value;
 498         int ret;
 499
 500         ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value);
 501         if (ret)
 502                 return ret;
 503
 504         if (((value & 0x0f) == 0x8) && (pfuze_chip->chip_id == PFUZE100)) {
 505                 /*
 506                  * Freescale misprogrammed 1-3% of parts prior to week 8 of 2013
 507                  * as ID=8 in PFUZE100
 508                  */
 509                 dev_info(pfuze_chip->dev, "Assuming misprogrammed ID=0x8");
 510         } else if ((value & 0x0f) != pfuze_chip->chip_id &&
 511                    (value & 0xf0) >> 4 != pfuze_chip->chip_id) {
 512                 /* device id NOT match with your setting */
 513                 dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
 514                 return -ENODEV;
 515         }
 516
 517         ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);
 518         if (ret)
 519                 return ret;
 520         dev_info(pfuze_chip->dev,
 521                  "Full layer: %x, Metal layer: %x\n",
 522                  (value & 0xf0) >> 4, value & 0x0f);
 523
 524         ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value);
 525         if (ret)
 526                 return ret;
 527         dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n",
 528                  (value & 0xc) >> 2, value & 0x3);
 529
 530         return 0;
 531 }
 532
 533 static const struct regmap_config pfuze_regmap_config = {
 534         .reg_bits = 8,
 535         .val_bits = 8,
 536         .max_register = PFUZE_NUMREGS - 1,
 537         .cache_type = REGCACHE_RBTREE,
 538 };
 539
 540 static int pfuze100_regulator_probe(struct i2c_client *client,
 541                                     const struct i2c_device_id *id)
 542 {
 543         struct pfuze_chip *pfuze_chip;
 544         struct pfuze_regulator_platform_data *pdata =
 545             dev_get_platdata(&client->dev);
 546         struct regulator_config config = { };
 547         int i, ret;
 548         const struct of_device_id *match;
 549         u32 regulator_num;
 550         u32 sw_check_start, sw_check_end, sw_hi = 0x40;
 551
 552         pfuze_chip = devm_kzalloc(&client->dev, sizeof(*pfuze_chip),
 553                         GFP_KERNEL);
 554         if (!pfuze_chip)
 555                 return -ENOMEM;
 556
 557         if (client->dev.of_node) {
 558                 match = of_match_device(of_match_ptr(pfuze_dt_ids),
 559                                 &client->dev);
 560                 if (!match) {
 561                         dev_err(&client->dev, "Error: No device match found\n");
 562                         return -ENODEV;
 563                 }
 564                 pfuze_chip->chip_id = (int)(long)match->data;
 565         } else if (id) {
 566                 pfuze_chip->chip_id = id->driver_data;
 567         } else {
 568                 dev_err(&client->dev, "No dts match or id table match found\n");
 569                 return -ENODEV;
 570         }
 571
 572         i2c_set_clientdata(client, pfuze_chip);
 573         pfuze_chip->dev = &client->dev;
 574
 575         pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config);
 576         if (IS_ERR(pfuze_chip->regmap)) {
 577                 ret = PTR_ERR(pfuze_chip->regmap);
 578                 dev_err(&client->dev,
 579                         "regmap allocation failed with err %d\n", ret);
 580                 return ret;
 581         }
 582
 583         ret = pfuze_identify(pfuze_chip);
 584         if (ret) {
 585                 dev_err(&client->dev, "unrecognized pfuze chip ID!\n");
 586                 return ret;
 587         }
 588
 589         /* use the right regulators after identify the right device */
 590         switch (pfuze_chip->chip_id) {
 591         case PFUZE3000:
 592                 pfuze_chip->pfuze_regulators = pfuze3000_regulators;
 593                 regulator_num = ARRAY_SIZE(pfuze3000_regulators);
 594                 sw_check_start = PFUZE3000_SW2;
 595                 sw_check_end = PFUZE3000_SW2;
 596                 sw_hi = 1 << 3;
 597                 break;
 598         case PFUZE200:
 599                 pfuze_chip->pfuze_regulators = pfuze200_regulators;
 600                 regulator_num = ARRAY_SIZE(pfuze200_regulators);
 601                 sw_check_start = PFUZE200_SW2;
 602                 sw_check_end = PFUZE200_SW3B;
 603                 break;
 604         case PFUZE100:
 605         default:
 606                 pfuze_chip->pfuze_regulators = pfuze100_regulators;
 607                 regulator_num = ARRAY_SIZE(pfuze100_regulators);
 608                 sw_check_start = PFUZE100_SW2;
 609                 sw_check_end = PFUZE100_SW4;
 610                 break;
 611         }
 612         dev_info(&client->dev, "pfuze%s found.\n",
 613                 (pfuze_chip->chip_id == PFUZE100) ? "100" :
 614                 ((pfuze_chip->chip_id == PFUZE200) ? "200" : "3000"));
 615
 616         memcpy(pfuze_chip->regulator_descs, pfuze_chip->pfuze_regulators,
 617                 regulator_num * sizeof(struct pfuze_regulator));
 618
 619         ret = pfuze_parse_regulators_dt(pfuze_chip);
 620         if (ret)
 621                 return ret;
 622
 623         for (i = 0; i < regulator_num; i++) {
 624                 struct regulator_init_data *init_data;
 625                 struct regulator_desc *desc;
 626                 int val;
 627
 628                 desc = &pfuze_chip->regulator_descs[i].desc;
 629
 630                 if (pdata)
 631                         init_data = pdata->init_data[i];
 632                 else
 633                         init_data = match_init_data(i);
 634
 635                 /* SW2~SW4 high bit check and modify the voltage value table */
 636                 if (i >= sw_check_start && i <= sw_check_end) {
 637                         ret = regmap_read(pfuze_chip->regmap,
 638                                                 desc->vsel_reg, &val);
 639                         if (ret) {
 640                                 dev_err(&client->dev, "Fails to read from the register.\n");
 641                                 return ret;
 642                         }
 643
 644                         if (val & sw_hi) {
 645                                 if (pfuze_chip->chip_id == PFUZE3000) {
 646                                         desc->volt_table = pfuze3000_sw2hi;
 647                                         desc->n_voltages = ARRAY_SIZE(pfuze3000_sw2hi);
 648                                 } else {
 649                                         desc->min_uV = 800000;
 650                                         desc->uV_step = 50000;
 651                                         desc->n_voltages = 51;
 652                                 }
 653                         }
 654                 }
 655
 656                 config.dev = &client->dev;
 657                 config.init_data = init_data;
 658                 config.driver_data = pfuze_chip;
 659                 config.of_node = match_of_node(i);
 660                 config.ena_gpio = -EINVAL;
 661
 662                 pfuze_chip->regulators[i] =
 663                         devm_regulator_register(&client->dev, desc, &config);
 664                 if (IS_ERR(pfuze_chip->regulators[i])) {
 665                         dev_err(&client->dev, "register regulator%s failed\n",
 666                                 pfuze_chip->pfuze_regulators[i].desc.name);
 667                         return PTR_ERR(pfuze_chip->regulators[i]);
 668                 }
 669         }
 670
 671         return 0;
 672 }
 673
 674 static struct i2c_driver pfuze_driver = {
 675         .id_table = pfuze_device_id,
 676         .driver = {
 677                 .name = "pfuze100-regulator",
 678                 .of_match_table = pfuze_dt_ids,
 679         },
 680         .probe = pfuze100_regulator_probe,
 681 };
 682 module_i2c_driver(pfuze_driver);
 683
 684 MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
 685 MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100/200/3000 PMIC");
 686 MODULE_LICENSE("GPL v2");