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                 return -EINVAL;
 435         }
 436
 437         switch (chip->chip_id) {
 438         case PFUZE3000:
 439                 pfuze_matches = pfuze3000_matches;
 440                 ret = of_regulator_match(dev, parent, pfuze3000_matches,
 441                                          ARRAY_SIZE(pfuze3000_matches));
 442                 break;
 443         case PFUZE200:
 444                 pfuze_matches = pfuze200_matches;
 445                 ret = of_regulator_match(dev, parent, pfuze200_matches,
 446                                          ARRAY_SIZE(pfuze200_matches));
 447                 break;
 448
 449         case PFUZE100:
 450         default:
 451                 pfuze_matches = pfuze100_matches;
 452                 ret = of_regulator_match(dev, parent, pfuze100_matches,
 453                                          ARRAY_SIZE(pfuze100_matches));
 454                 break;
 455         }
 456
 457         of_node_put(parent);
 458         if (ret < 0) {
 459                 dev_err(dev, "Error parsing regulator init data: %d\n",
 460                         ret);
 461                 return ret;
 462         }
 463
 464         return 0;
 465 }
 466
 467 static inline struct regulator_init_data *match_init_data(int index)
 468 {
 469         return pfuze_matches[index].init_data;
 470 }
 471
 472 static inline struct device_node *match_of_node(int index)
 473 {
 474         return pfuze_matches[index].of_node;
 475 }
 476 #else
 477 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
 478 {
 479         return 0;
 480 }
 481
 482 static inline struct regulator_init_data *match_init_data(int index)
 483 {
 484         return NULL;
 485 }
 486
 487 static inline struct device_node *match_of_node(int index)
 488 {
 489         return NULL;
 490 }
 491 #endif
 492
 493 static int pfuze_identify(struct pfuze_chip *pfuze_chip)
 494 {
 495         unsigned int value;
 496         int ret;
 497
 498         ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value);
 499         if (ret)
 500                 return ret;
 501
 502         if (((value & 0x0f) == 0x8) && (pfuze_chip->chip_id == PFUZE100)) {
 503                 /*
 504                  * Freescale misprogrammed 1-3% of parts prior to week 8 of 2013
 505                  * as ID=8 in PFUZE100
 506                  */
 507                 dev_info(pfuze_chip->dev, "Assuming misprogrammed ID=0x8");
 508         } else if ((value & 0x0f) != pfuze_chip->chip_id &&
 509                    (value & 0xf0) >> 4 != pfuze_chip->chip_id) {
 510                 /* device id NOT match with your setting */
 511                 dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
 512                 return -ENODEV;
 513         }
 514
 515         ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);
 516         if (ret)
 517                 return ret;
 518         dev_info(pfuze_chip->dev,
 519                  "Full layer: %x, Metal layer: %x\n",
 520                  (value & 0xf0) >> 4, value & 0x0f);
 521
 522         ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value);
 523         if (ret)
 524                 return ret;
 525         dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n",
 526                  (value & 0xc) >> 2, value & 0x3);
 527
 528         return 0;
 529 }
 530
 531 static const struct regmap_config pfuze_regmap_config = {
 532         .reg_bits = 8,
 533         .val_bits = 8,
 534         .max_register = PFUZE_NUMREGS - 1,
 535         .cache_type = REGCACHE_RBTREE,
 536 };
 537
 538 static int pfuze100_regulator_probe(struct i2c_client *client,
 539                                     const struct i2c_device_id *id)
 540 {
 541         struct pfuze_chip *pfuze_chip;
 542         struct pfuze_regulator_platform_data *pdata =
 543             dev_get_platdata(&client->dev);
 544         struct regulator_config config = { };
 545         int i, ret;
 546         const struct of_device_id *match;
 547         u32 regulator_num;
 548         u32 sw_check_start, sw_check_end, sw_hi = 0x40;
 549
 550         pfuze_chip = devm_kzalloc(&client->dev, sizeof(*pfuze_chip),
 551                         GFP_KERNEL);
 552         if (!pfuze_chip)
 553                 return -ENOMEM;
 554
 555         if (client->dev.of_node) {
 556                 match = of_match_device(of_match_ptr(pfuze_dt_ids),
 557                                 &client->dev);
 558                 if (!match) {
 559                         dev_err(&client->dev, "Error: No device match found\n");
 560                         return -ENODEV;
 561                 }
 562                 pfuze_chip->chip_id = (int)(long)match->data;
 563         } else if (id) {
 564                 pfuze_chip->chip_id = id->driver_data;
 565         } else {
 566                 dev_err(&client->dev, "No dts match or id table match found\n");
 567                 return -ENODEV;
 568         }
 569
 570         i2c_set_clientdata(client, pfuze_chip);
 571         pfuze_chip->dev = &client->dev;
 572
 573         pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config);
 574         if (IS_ERR(pfuze_chip->regmap)) {
 575                 ret = PTR_ERR(pfuze_chip->regmap);
 576                 dev_err(&client->dev,
 577                         "regmap allocation failed with err %d\n", ret);
 578                 return ret;
 579         }
 580
 581         ret = pfuze_identify(pfuze_chip);
 582         if (ret) {
 583                 dev_err(&client->dev, "unrecognized pfuze chip ID!\n");
 584                 return ret;
 585         }
 586
 587         /* use the right regulators after identify the right device */
 588         switch (pfuze_chip->chip_id) {
 589         case PFUZE3000:
 590                 pfuze_chip->pfuze_regulators = pfuze3000_regulators;
 591                 regulator_num = ARRAY_SIZE(pfuze3000_regulators);
 592                 sw_check_start = PFUZE3000_SW2;
 593                 sw_check_end = PFUZE3000_SW2;
 594                 sw_hi = 1 << 3;
 595                 break;
 596         case PFUZE200:
 597                 pfuze_chip->pfuze_regulators = pfuze200_regulators;
 598                 regulator_num = ARRAY_SIZE(pfuze200_regulators);
 599                 sw_check_start = PFUZE200_SW2;
 600                 sw_check_end = PFUZE200_SW3B;
 601                 break;
 602         case PFUZE100:
 603         default:
 604                 pfuze_chip->pfuze_regulators = pfuze100_regulators;
 605                 regulator_num = ARRAY_SIZE(pfuze100_regulators);
 606                 sw_check_start = PFUZE100_SW2;
 607                 sw_check_end = PFUZE100_SW4;
 608                 break;
 609         }
 610         dev_info(&client->dev, "pfuze%s found.\n",
 611                 (pfuze_chip->chip_id == PFUZE100) ? "100" :
 612                 ((pfuze_chip->chip_id == PFUZE200) ? "200" : "3000"));
 613
 614         memcpy(pfuze_chip->regulator_descs, pfuze_chip->pfuze_regulators,
 615                 sizeof(pfuze_chip->regulator_descs));
 616
 617         ret = pfuze_parse_regulators_dt(pfuze_chip);
 618         if (ret)
 619                 return ret;
 620
 621         for (i = 0; i < regulator_num; i++) {
 622                 struct regulator_init_data *init_data;
 623                 struct regulator_desc *desc;
 624                 int val;
 625
 626                 desc = &pfuze_chip->regulator_descs[i].desc;
 627
 628                 if (pdata)
 629                         init_data = pdata->init_data[i];
 630                 else
 631                         init_data = match_init_data(i);
 632
 633                 /* SW2~SW4 high bit check and modify the voltage value table */
 634                 if (i >= sw_check_start && i <= sw_check_end) {
 635                         ret = regmap_read(pfuze_chip->regmap,
 636                                                 desc->vsel_reg, &val);
 637                         if (ret) {
 638                                 dev_err(&client->dev, "Fails to read from the register.\n");
 639                                 return ret;
 640                         }
 641
 642                         if (val & sw_hi) {
 643                                 if (pfuze_chip->chip_id == PFUZE3000) {
 644                                         desc->volt_table = pfuze3000_sw2hi;
 645                                         desc->n_voltages = ARRAY_SIZE(pfuze3000_sw2hi);
 646                                 } else {
 647                                         desc->min_uV = 800000;
 648                                         desc->uV_step = 50000;
 649                                         desc->n_voltages = 51;
 650                                 }
 651                         }
 652                 }
 653
 654                 config.dev = &client->dev;
 655                 config.init_data = init_data;
 656                 config.driver_data = pfuze_chip;
 657                 config.of_node = match_of_node(i);
 658                 config.ena_gpio = -EINVAL;
 659
 660                 pfuze_chip->regulators[i] =
 661                         devm_regulator_register(&client->dev, desc, &config);
 662                 if (IS_ERR(pfuze_chip->regulators[i])) {
 663                         dev_err(&client->dev, "register regulator%s failed\n",
 664                                 pfuze_chip->pfuze_regulators[i].desc.name);
 665                         return PTR_ERR(pfuze_chip->regulators[i]);
 666                 }
 667         }
 668
 669         return 0;
 670 }
 671
 672 static struct i2c_driver pfuze_driver = {
 673         .id_table = pfuze_device_id,
 674         .driver = {
 675                 .name = "pfuze100-regulator",
 676                 .of_match_table = pfuze_dt_ids,
 677         },
 678         .probe = pfuze100_regulator_probe,
 679 };
 680 module_i2c_driver(pfuze_driver);
 681
 682 MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
 683 MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100/200/3000 PMIC");
 684 MODULE_LICENSE("GPL v2");