drivers/regulator/pfuze100-regulator.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 //
   3 // Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
   4
   5 #include <linux/kernel.h>
   6 #include <linux/module.h>
   7 #include <linux/init.h>
   8 #include <linux/err.h>
   9 #include <linux/of.h>
  10 #include <linux/of_device.h>
  11 #include <linux/regulator/of_regulator.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/regulator/driver.h>
  14 #include <linux/regulator/machine.h>
  15 #include <linux/regulator/pfuze100.h>
  16 #include <linux/i2c.h>
  17 #include <linux/slab.h>
  18 #include <linux/regmap.h>
  19
  20 #define PFUZE_NUMREGS           128
  21 #define PFUZE100_VOL_OFFSET     0
  22 #define PFUZE100_STANDBY_OFFSET 1
  23 #define PFUZE100_MODE_OFFSET    3
  24 #define PFUZE100_CONF_OFFSET    4
  25
  26 #define PFUZE100_DEVICEID       0x0
  27 #define PFUZE100_REVID          0x3
  28 #define PFUZE100_FABID          0x4
  29
  30 #define PFUZE100_COINVOL        0x1a
  31 #define PFUZE100_SW1ABVOL       0x20
  32 #define PFUZE100_SW1CVOL        0x2e
  33 #define PFUZE100_SW2VOL         0x35
  34 #define PFUZE100_SW3AVOL        0x3c
  35 #define PFUZE100_SW3BVOL        0x43
  36 #define PFUZE100_SW4VOL         0x4a
  37 #define PFUZE100_SWBSTCON1      0x66
  38 #define PFUZE100_VREFDDRCON     0x6a
  39 #define PFUZE100_VSNVSVOL       0x6b
  40 #define PFUZE100_VGEN1VOL       0x6c
  41 #define PFUZE100_VGEN2VOL       0x6d
  42 #define PFUZE100_VGEN3VOL       0x6e
  43 #define PFUZE100_VGEN4VOL       0x6f
  44 #define PFUZE100_VGEN5VOL       0x70
  45 #define PFUZE100_VGEN6VOL       0x71
  46
  47 enum chips { PFUZE100, PFUZE200, PFUZE3000 = 3 };
  48
  49 struct pfuze_regulator {
  50         struct regulator_desc desc;
  51         unsigned char stby_reg;
  52         unsigned char stby_mask;
  53 };
  54
  55 struct pfuze_chip {
  56         int     chip_id;
  57         struct regmap *regmap;
  58         struct device *dev;
  59         struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
  60         struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
  61         struct pfuze_regulator *pfuze_regulators;
  62 };
  63
  64 static const int pfuze100_swbst[] = {
  65         5000000, 5050000, 5100000, 5150000,
  66 };
  67
  68 static const int pfuze100_vsnvs[] = {
  69         1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,
  70 };
  71
  72 static const int pfuze100_coin[] = {
  73         2500000, 2700000, 2800000, 2900000, 3000000, 3100000, 3200000, 3300000,
  74 };
  75
  76 static const int pfuze3000_sw1a[] = {
  77         700000, 725000, 750000, 775000, 800000, 825000, 850000, 875000,
  78         900000, 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000,
  79         1100000, 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000,
  80         1300000, 1325000, 1350000, 1375000, 1400000, 1425000, 1800000, 3300000,
  81 };
  82
  83 static const int pfuze3000_sw2lo[] = {
  84         1500000, 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000,
  85 };
  86
  87 static const int pfuze3000_sw2hi[] = {
  88         2500000, 2800000, 2850000, 3000000, 3100000, 3150000, 3200000, 3300000,
  89 };
  90
  91 static const struct i2c_device_id pfuze_device_id[] = {
  92         {.name = "pfuze100", .driver_data = PFUZE100},
  93         {.name = "pfuze200", .driver_data = PFUZE200},
  94         {.name = "pfuze3000", .driver_data = PFUZE3000},
  95         { }
  96 };
  97 MODULE_DEVICE_TABLE(i2c, pfuze_device_id);
  98
  99 static const struct of_device_id pfuze_dt_ids[] = {
 100         { .compatible = "fsl,pfuze100", .data = (void *)PFUZE100},
 101         { .compatible = "fsl,pfuze200", .data = (void *)PFUZE200},
 102         { .compatible = "fsl,pfuze3000", .data = (void *)PFUZE3000},
 103         { }
 104 };
 105 MODULE_DEVICE_TABLE(of, pfuze_dt_ids);
 106
 107 static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
 108 {
 109         struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
 110         int id = rdev_get_id(rdev);
 111         unsigned int ramp_bits;
 112         int ret;
 113
 114         if (id < PFUZE100_SWBST) {
 115                 ramp_delay = 12500 / ramp_delay;
 116                 ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
 117                 ret = regmap_update_bits(pfuze100->regmap,
 118                                          rdev->desc->vsel_reg + 4,
 119                                          0xc0, ramp_bits << 6);
 120                 if (ret < 0)
 121                         dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
 122         } else
 123                 ret = -EACCES;
 124
 125         return ret;
 126 }
 127
 128 static const struct regulator_ops pfuze100_ldo_regulator_ops = {
 129         .enable = regulator_enable_regmap,
 130         .disable = regulator_disable_regmap,
 131         .is_enabled = regulator_is_enabled_regmap,
 132         .list_voltage = regulator_list_voltage_linear,
 133         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 134         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 135 };
 136
 137 static const struct regulator_ops pfuze100_fixed_regulator_ops = {
 138         .enable = regulator_enable_regmap,
 139         .disable = regulator_disable_regmap,
 140         .is_enabled = regulator_is_enabled_regmap,
 141         .list_voltage = regulator_list_voltage_linear,
 142 };
 143
 144 static const struct regulator_ops pfuze100_sw_regulator_ops = {
 145         .enable = regulator_enable_regmap,
 146         .disable = regulator_disable_regmap,
 147         .is_enabled = regulator_is_enabled_regmap,
 148         .list_voltage = regulator_list_voltage_linear,
 149         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 150         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 151         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 152         .set_ramp_delay = pfuze100_set_ramp_delay,
 153 };
 154
 155 static const struct regulator_ops pfuze100_swb_regulator_ops = {
 156         .enable = regulator_enable_regmap,
 157         .disable = regulator_disable_regmap,
 158         .is_enabled = regulator_is_enabled_regmap,
 159         .list_voltage = regulator_list_voltage_table,
 160         .map_voltage = regulator_map_voltage_ascend,
 161         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 162         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 163
 164 };
 165
 166 #define PFUZE100_FIXED_REG(_chip, _name, base, voltage) \
 167         [_chip ## _ ## _name] = {       \
 168                 .desc = {       \
 169                         .name = #_name, \
 170                         .n_voltages = 1,        \
 171                         .ops = &pfuze100_fixed_regulator_ops,   \
 172                         .type = REGULATOR_VOLTAGE,      \
 173                         .id = _chip ## _ ## _name,      \
 174                         .owner = THIS_MODULE,   \
 175                         .min_uV = (voltage),    \
 176                         .enable_reg = (base),   \
 177                         .enable_mask = 0x10,    \
 178                 },      \
 179         }
 180
 181 #define PFUZE100_SW_REG(_chip, _name, base, min, max, step)     \
 182         [_chip ## _ ## _name] = {       \
 183                 .desc = {       \
 184                         .name = #_name,\
 185                         .n_voltages = ((max) - (min)) / (step) + 1,     \
 186                         .ops = &pfuze100_sw_regulator_ops,      \
 187                         .type = REGULATOR_VOLTAGE,      \
 188                         .id = _chip ## _ ## _name,      \
 189                         .owner = THIS_MODULE,   \
 190                         .min_uV = (min),        \
 191                         .uV_step = (step),      \
 192                         .vsel_reg = (base) + PFUZE100_VOL_OFFSET,       \
 193                         .vsel_mask = 0x3f,      \
 194                         .enable_reg = (base) + PFUZE100_MODE_OFFSET,    \
 195                         .enable_val = 0xc,      \
 196                         .disable_val = 0x0,     \
 197                         .enable_mask = 0xf,     \
 198                         .enable_time = 500,     \
 199                 },      \
 200                 .stby_reg = (base) + PFUZE100_STANDBY_OFFSET,   \
 201                 .stby_mask = 0x3f,      \
 202         }
 203
 204 #define PFUZE100_SWB_REG(_chip, _name, base, mask, voltages)    \
 205         [_chip ## _ ##  _name] = {      \
 206                 .desc = {       \
 207                         .name = #_name, \
 208                         .n_voltages = ARRAY_SIZE(voltages),     \
 209                         .ops = &pfuze100_swb_regulator_ops,     \
 210                         .type = REGULATOR_VOLTAGE,      \
 211                         .id = _chip ## _ ## _name,      \
 212                         .owner = THIS_MODULE,   \
 213                         .volt_table = voltages, \
 214                         .vsel_reg = (base),     \
 215                         .vsel_mask = (mask),    \
 216                         .enable_reg = (base),   \
 217                         .enable_mask = 0x48,    \
 218                 },      \
 219         }
 220
 221 #define PFUZE100_VGEN_REG(_chip, _name, base, min, max, step)   \
 222         [_chip ## _ ## _name] = {       \
 223                 .desc = {       \
 224                         .name = #_name, \
 225                         .n_voltages = ((max) - (min)) / (step) + 1,     \
 226                         .ops = &pfuze100_ldo_regulator_ops,     \
 227                         .type = REGULATOR_VOLTAGE,      \
 228                         .id = _chip ## _ ## _name,      \
 229                         .owner = THIS_MODULE,   \
 230                         .min_uV = (min),        \
 231                         .uV_step = (step),      \
 232                         .vsel_reg = (base),     \
 233                         .vsel_mask = 0xf,       \
 234                         .enable_reg = (base),   \
 235                         .enable_mask = 0x10,    \
 236                 },      \
 237                 .stby_reg = (base),     \
 238                 .stby_mask = 0x20,      \
 239         }
 240
 241 #define PFUZE100_COIN_REG(_chip, _name, base, mask, voltages)   \
 242         [_chip ## _ ##  _name] = {      \
 243                 .desc = {       \
 244                         .name = #_name, \
 245                         .n_voltages = ARRAY_SIZE(voltages),     \
 246                         .ops = &pfuze100_swb_regulator_ops,     \
 247                         .type = REGULATOR_VOLTAGE,      \
 248                         .id = _chip ## _ ## _name,      \
 249                         .owner = THIS_MODULE,   \
 250                         .volt_table = voltages, \
 251                         .vsel_reg = (base),     \
 252                         .vsel_mask = (mask),    \
 253                         .enable_reg = (base),   \
 254                         .enable_mask = 0x8,     \
 255                 },      \
 256         }
 257
 258 #define PFUZE3000_VCC_REG(_chip, _name, base, min, max, step)   {       \
 259         .desc = {       \
 260                 .name = #_name, \
 261                 .n_voltages = ((max) - (min)) / (step) + 1,     \
 262                 .ops = &pfuze100_ldo_regulator_ops,     \
 263                 .type = REGULATOR_VOLTAGE,      \
 264                 .id = _chip ## _ ## _name,      \
 265                 .owner = THIS_MODULE,   \
 266                 .min_uV = (min),        \
 267                 .uV_step = (step),      \
 268                 .vsel_reg = (base),     \
 269                 .vsel_mask = 0x3,       \
 270                 .enable_reg = (base),   \
 271                 .enable_mask = 0x10,    \
 272         },      \
 273         .stby_reg = (base),     \
 274         .stby_mask = 0x20,      \
 275 }
 276
 277
 278 #define PFUZE3000_SW2_REG(_chip, _name, base, min, max, step)   {       \
 279         .desc = {       \
 280                 .name = #_name,\
 281                 .n_voltages = ((max) - (min)) / (step) + 1,     \
 282                 .ops = &pfuze100_sw_regulator_ops,      \
 283                 .type = REGULATOR_VOLTAGE,      \
 284                 .id = _chip ## _ ## _name,      \
 285                 .owner = THIS_MODULE,   \
 286                 .min_uV = (min),        \
 287                 .uV_step = (step),      \
 288                 .vsel_reg = (base) + PFUZE100_VOL_OFFSET,       \
 289                 .vsel_mask = 0x7,       \
 290         },      \
 291         .stby_reg = (base) + PFUZE100_STANDBY_OFFSET,   \
 292         .stby_mask = 0x7,       \
 293 }
 294
 295 #define PFUZE3000_SW3_REG(_chip, _name, base, min, max, step)   {       \
 296         .desc = {       \
 297                 .name = #_name,\
 298                 .n_voltages = ((max) - (min)) / (step) + 1,     \
 299                 .ops = &pfuze100_sw_regulator_ops,      \
 300                 .type = REGULATOR_VOLTAGE,      \
 301                 .id = _chip ## _ ## _name,      \
 302                 .owner = THIS_MODULE,   \
 303                 .min_uV = (min),        \
 304                 .uV_step = (step),      \
 305                 .vsel_reg = (base) + PFUZE100_VOL_OFFSET,       \
 306                 .vsel_mask = 0xf,       \
 307         },      \
 308         .stby_reg = (base) + PFUZE100_STANDBY_OFFSET,   \
 309         .stby_mask = 0xf,       \
 310 }
 311
 312 /* PFUZE100 */
 313 static struct pfuze_regulator pfuze100_regulators[] = {
 314         PFUZE100_SW_REG(PFUZE100, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
 315         PFUZE100_SW_REG(PFUZE100, SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000),
 316         PFUZE100_SW_REG(PFUZE100, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
 317         PFUZE100_SW_REG(PFUZE100, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
 318         PFUZE100_SW_REG(PFUZE100, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
 319         PFUZE100_SW_REG(PFUZE100, SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000),
 320         PFUZE100_SWB_REG(PFUZE100, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
 321         PFUZE100_SWB_REG(PFUZE100, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
 322         PFUZE100_FIXED_REG(PFUZE100, VREFDDR, PFUZE100_VREFDDRCON, 750000),
 323         PFUZE100_VGEN_REG(PFUZE100, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
 324         PFUZE100_VGEN_REG(PFUZE100, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
 325         PFUZE100_VGEN_REG(PFUZE100, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
 326         PFUZE100_VGEN_REG(PFUZE100, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
 327         PFUZE100_VGEN_REG(PFUZE100, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
 328         PFUZE100_VGEN_REG(PFUZE100, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
 329 };
 330
 331 static struct pfuze_regulator pfuze200_regulators[] = {
 332         PFUZE100_SW_REG(PFUZE200, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
 333         PFUZE100_SW_REG(PFUZE200, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
 334         PFUZE100_SW_REG(PFUZE200, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
 335         PFUZE100_SW_REG(PFUZE200, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
 336         PFUZE100_SWB_REG(PFUZE200, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
 337         PFUZE100_SWB_REG(PFUZE200, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
 338         PFUZE100_FIXED_REG(PFUZE200, VREFDDR, PFUZE100_VREFDDRCON, 750000),
 339         PFUZE100_VGEN_REG(PFUZE200, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
 340         PFUZE100_VGEN_REG(PFUZE200, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
 341         PFUZE100_VGEN_REG(PFUZE200, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
 342         PFUZE100_VGEN_REG(PFUZE200, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
 343         PFUZE100_VGEN_REG(PFUZE200, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
 344         PFUZE100_VGEN_REG(PFUZE200, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
 345         PFUZE100_COIN_REG(PFUZE200, COIN, PFUZE100_COINVOL, 0x7, pfuze100_coin),
 346 };
 347
 348 static struct pfuze_regulator pfuze3000_regulators[] = {
 349         PFUZE100_SWB_REG(PFUZE3000, SW1A, PFUZE100_SW1ABVOL, 0x1f, pfuze3000_sw1a),
 350         PFUZE100_SW_REG(PFUZE3000, SW1B, PFUZE100_SW1CVOL, 700000, 1475000, 25000),
 351         PFUZE100_SWB_REG(PFUZE3000, SW2, PFUZE100_SW2VOL, 0x7, pfuze3000_sw2lo),
 352         PFUZE3000_SW3_REG(PFUZE3000, SW3, PFUZE100_SW3AVOL, 900000, 1650000, 50000),
 353         PFUZE100_SWB_REG(PFUZE3000, SWBST, PFUZE100_SWBSTCON1, 0x3, pfuze100_swbst),
 354         PFUZE100_SWB_REG(PFUZE3000, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
 355         PFUZE100_FIXED_REG(PFUZE3000, VREFDDR, PFUZE100_VREFDDRCON, 750000),
 356         PFUZE100_VGEN_REG(PFUZE3000, VLDO1, PFUZE100_VGEN1VOL, 1800000, 3300000, 100000),
 357         PFUZE100_VGEN_REG(PFUZE3000, VLDO2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
 358         PFUZE3000_VCC_REG(PFUZE3000, VCCSD, PFUZE100_VGEN3VOL, 2850000, 3300000, 150000),
 359         PFUZE3000_VCC_REG(PFUZE3000, V33, PFUZE100_VGEN4VOL, 2850000, 3300000, 150000),
 360         PFUZE100_VGEN_REG(PFUZE3000, VLDO3, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
 361         PFUZE100_VGEN_REG(PFUZE3000, VLDO4, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
 362 };
 363
 364 #ifdef CONFIG_OF
 365 /* PFUZE100 */
 366 static struct of_regulator_match pfuze100_matches[] = {
 367         { .name = "sw1ab",      },
 368         { .name = "sw1c",       },
 369         { .name = "sw2",        },
 370         { .name = "sw3a",       },
 371         { .name = "sw3b",       },
 372         { .name = "sw4",        },
 373         { .name = "swbst",      },
 374         { .name = "vsnvs",      },
 375         { .name = "vrefddr",    },
 376         { .name = "vgen1",      },
 377         { .name = "vgen2",      },
 378         { .name = "vgen3",      },
 379         { .name = "vgen4",      },
 380         { .name = "vgen5",      },
 381         { .name = "vgen6",      },
 382 };
 383
 384 /* PFUZE200 */
 385 static struct of_regulator_match pfuze200_matches[] = {
 386
 387         { .name = "sw1ab",      },
 388         { .name = "sw2",        },
 389         { .name = "sw3a",       },
 390         { .name = "sw3b",       },
 391         { .name = "swbst",      },
 392         { .name = "vsnvs",      },
 393         { .name = "vrefddr",    },
 394         { .name = "vgen1",      },
 395         { .name = "vgen2",      },
 396         { .name = "vgen3",      },
 397         { .name = "vgen4",      },
 398         { .name = "vgen5",      },
 399         { .name = "vgen6",      },
 400         { .name = "coin",       },
 401 };
 402
 403 /* PFUZE3000 */
 404 static struct of_regulator_match pfuze3000_matches[] = {
 405
 406         { .name = "sw1a",       },
 407         { .name = "sw1b",       },
 408         { .name = "sw2",        },
 409         { .name = "sw3",        },
 410         { .name = "swbst",      },
 411         { .name = "vsnvs",      },
 412         { .name = "vrefddr",    },
 413         { .name = "vldo1",      },
 414         { .name = "vldo2",      },
 415         { .name = "vccsd",      },
 416         { .name = "v33",        },
 417         { .name = "vldo3",      },
 418         { .name = "vldo4",      },
 419 };
 420
 421 static struct of_regulator_match *pfuze_matches;
 422
 423 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
 424 {
 425         struct device *dev = chip->dev;
 426         struct device_node *np, *parent;
 427         int ret;
 428
 429         np = of_node_get(dev->of_node);
 430         if (!np)
 431                 return -EINVAL;
 432
 433         parent = of_get_child_by_name(np, "regulators");
 434         if (!parent) {
 435                 dev_err(dev, "regulators node not found\n");
 436                 return -EINVAL;
 437         }
 438
 439         switch (chip->chip_id) {
 440         case PFUZE3000:
 441                 pfuze_matches = pfuze3000_matches;
 442                 ret = of_regulator_match(dev, parent, pfuze3000_matches,
 443                                          ARRAY_SIZE(pfuze3000_matches));
 444                 break;
 445         case PFUZE200:
 446                 pfuze_matches = pfuze200_matches;
 447                 ret = of_regulator_match(dev, parent, pfuze200_matches,
 448                                          ARRAY_SIZE(pfuze200_matches));
 449                 break;
 450
 451         case PFUZE100:
 452         default:
 453                 pfuze_matches = pfuze100_matches;
 454                 ret = of_regulator_match(dev, parent, pfuze100_matches,
 455                                          ARRAY_SIZE(pfuze100_matches));
 456                 break;
 457         }
 458
 459         of_node_put(parent);
 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                 sizeof(pfuze_chip->regulator_descs));
 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                         regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
 638                         if (val & sw_hi) {
 639                                 if (pfuze_chip->chip_id == PFUZE3000) {
 640                                         desc->volt_table = pfuze3000_sw2hi;
 641                                         desc->n_voltages = ARRAY_SIZE(pfuze3000_sw2hi);
 642                                 } else {
 643                                         desc->min_uV = 800000;
 644                                         desc->uV_step = 50000;
 645                                         desc->n_voltages = 51;
 646                                 }
 647                         }
 648                 }
 649
 650                 config.dev = &client->dev;
 651                 config.init_data = init_data;
 652                 config.driver_data = pfuze_chip;
 653                 config.of_node = match_of_node(i);
 654
 655                 pfuze_chip->regulators[i] =
 656                         devm_regulator_register(&client->dev, desc, &config);
 657                 if (IS_ERR(pfuze_chip->regulators[i])) {
 658                         dev_err(&client->dev, "register regulator%s failed\n",
 659                                 pfuze_chip->pfuze_regulators[i].desc.name);
 660                         return PTR_ERR(pfuze_chip->regulators[i]);
 661                 }
 662         }
 663
 664         return 0;
 665 }
 666
 667 static struct i2c_driver pfuze_driver = {
 668         .id_table = pfuze_device_id,
 669         .driver = {
 670                 .name = "pfuze100-regulator",
 671                 .of_match_table = pfuze_dt_ids,
 672         },
 673         .probe = pfuze100_regulator_probe,
 674 };
 675 module_i2c_driver(pfuze_driver);
 676
 677 MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
 678 MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100/200/3000 PMIC");
 679 MODULE_LICENSE("GPL v2");