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_SW1ABVOL       0x20
  44 #define PFUZE100_SW1CVOL        0x2e
  45 #define PFUZE100_SW2VOL         0x35
  46 #define PFUZE100_SW3AVOL        0x3c
  47 #define PFUZE100_SW3BVOL        0x43
  48 #define PFUZE100_SW4VOL         0x4a
  49 #define PFUZE100_SWBSTCON1      0x66
  50 #define PFUZE100_VREFDDRCON     0x6a
  51 #define PFUZE100_VSNVSVOL       0x6b
  52 #define PFUZE100_VGEN1VOL       0x6c
  53 #define PFUZE100_VGEN2VOL       0x6d
  54 #define PFUZE100_VGEN3VOL       0x6e
  55 #define PFUZE100_VGEN4VOL       0x6f
  56 #define PFUZE100_VGEN5VOL       0x70
  57 #define PFUZE100_VGEN6VOL       0x71
  58
  59 enum chips { PFUZE100, PFUZE200 };
  60
  61 struct pfuze_regulator {
  62         struct regulator_desc desc;
  63         unsigned char stby_reg;
  64         unsigned char stby_mask;
  65 };
  66
  67 struct pfuze_chip {
  68         int     chip_id;
  69         struct regmap *regmap;
  70         struct device *dev;
  71         struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
  72         struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
  73 };
  74
  75 static const int pfuze100_swbst[] = {
  76         5000000, 5050000, 5100000, 5150000,
  77 };
  78
  79 static const int pfuze100_vsnvs[] = {
  80         1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,
  81 };
  82
  83 static const struct i2c_device_id pfuze_device_id[] = {
  84         {.name = "pfuze100", .driver_data = PFUZE100},
  85         {.name = "pfuze200", .driver_data = PFUZE200},
  86         { }
  87 };
  88 MODULE_DEVICE_TABLE(i2c, pfuze_device_id);
  89
  90 static const struct of_device_id pfuze_dt_ids[] = {
  91         { .compatible = "fsl,pfuze100", .data = (void *)PFUZE100},
  92         { .compatible = "fsl,pfuze200", .data = (void *)PFUZE200},
  93         { }
  94 };
  95 MODULE_DEVICE_TABLE(of, pfuze_dt_ids);
  96
  97 static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
  98 {
  99         struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
 100         int id = rdev->desc->id;
 101         unsigned int ramp_bits;
 102         int ret;
 103
 104         if (id < PFUZE100_SWBST) {
 105                 ramp_delay = 12500 / ramp_delay;
 106                 ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
 107                 ret = regmap_update_bits(pfuze100->regmap,
 108                                          rdev->desc->vsel_reg + 4,
 109                                          0xc0, ramp_bits << 6);
 110                 if (ret < 0)
 111                         dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
 112         } else
 113                 ret = -EACCES;
 114
 115         return ret;
 116 }
 117
 118 static struct regulator_ops pfuze100_ldo_regulator_ops = {
 119         .enable = regulator_enable_regmap,
 120         .disable = regulator_disable_regmap,
 121         .is_enabled = regulator_is_enabled_regmap,
 122         .list_voltage = regulator_list_voltage_linear,
 123         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 124         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 125 };
 126
 127 static struct regulator_ops pfuze100_fixed_regulator_ops = {
 128         .list_voltage = regulator_list_voltage_linear,
 129 };
 130
 131 static struct regulator_ops pfuze100_sw_regulator_ops = {
 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         .set_voltage_time_sel = regulator_set_voltage_time_sel,
 136         .set_ramp_delay = pfuze100_set_ramp_delay,
 137 };
 138
 139 static struct regulator_ops pfuze100_swb_regulator_ops = {
 140         .list_voltage = regulator_list_voltage_table,
 141         .map_voltage = regulator_map_voltage_ascend,
 142         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 143         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 144
 145 };
 146
 147 #define PFUZE100_FIXED_REG(_chip, _name, base, voltage) \
 148         [_chip ## _ ## _name] = {       \
 149                 .desc = {       \
 150                         .name = #_name, \
 151                         .n_voltages = 1,        \
 152                         .ops = &pfuze100_fixed_regulator_ops,   \
 153                         .type = REGULATOR_VOLTAGE,      \
 154                         .id = _chip ## _ ## _name,      \
 155                         .owner = THIS_MODULE,   \
 156                         .min_uV = (voltage),    \
 157                         .enable_reg = (base),   \
 158                         .enable_mask = 0x10,    \
 159                 },      \
 160         }
 161
 162 #define PFUZE100_SW_REG(_chip, _name, base, min, max, step)     \
 163         [_chip ## _ ## _name] = {       \
 164                 .desc = {       \
 165                         .name = #_name,\
 166                         .n_voltages = ((max) - (min)) / (step) + 1,     \
 167                         .ops = &pfuze100_sw_regulator_ops,      \
 168                         .type = REGULATOR_VOLTAGE,      \
 169                         .id = _chip ## _ ## _name,      \
 170                         .owner = THIS_MODULE,   \
 171                         .min_uV = (min),        \
 172                         .uV_step = (step),      \
 173                         .vsel_reg = (base) + PFUZE100_VOL_OFFSET,       \
 174                         .vsel_mask = 0x3f,      \
 175                 },      \
 176                 .stby_reg = (base) + PFUZE100_STANDBY_OFFSET,   \
 177                 .stby_mask = 0x3f,      \
 178         }
 179
 180 #define PFUZE100_SWB_REG(_chip, _name, base, mask, voltages)    \
 181         [_chip ## _ ##  _name] = {      \
 182                 .desc = {       \
 183                         .name = #_name, \
 184                         .n_voltages = ARRAY_SIZE(voltages),     \
 185                         .ops = &pfuze100_swb_regulator_ops,     \
 186                         .type = REGULATOR_VOLTAGE,      \
 187                         .id = _chip ## _ ## _name,      \
 188                         .owner = THIS_MODULE,   \
 189                         .volt_table = voltages, \
 190                         .vsel_reg = (base),     \
 191                         .vsel_mask = (mask),    \
 192                 },      \
 193         }
 194
 195 #define PFUZE100_VGEN_REG(_chip, _name, base, min, max, step)   \
 196         [_chip ## _ ## _name] = {       \
 197                 .desc = {       \
 198                         .name = #_name, \
 199                         .n_voltages = ((max) - (min)) / (step) + 1,     \
 200                         .ops = &pfuze100_ldo_regulator_ops,     \
 201                         .type = REGULATOR_VOLTAGE,      \
 202                         .id = _chip ## _ ## _name,      \
 203                         .owner = THIS_MODULE,   \
 204                         .min_uV = (min),        \
 205                         .uV_step = (step),      \
 206                         .vsel_reg = (base),     \
 207                         .vsel_mask = 0xf,       \
 208                         .enable_reg = (base),   \
 209                         .enable_mask = 0x10,    \
 210                 },      \
 211                 .stby_reg = (base),     \
 212                 .stby_mask = 0x20,      \
 213         }
 214
 215 /* PFUZE100 */
 216 static struct pfuze_regulator pfuze100_regulators[] = {
 217         PFUZE100_SW_REG(PFUZE100, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
 218         PFUZE100_SW_REG(PFUZE100, SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000),
 219         PFUZE100_SW_REG(PFUZE100, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
 220         PFUZE100_SW_REG(PFUZE100, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
 221         PFUZE100_SW_REG(PFUZE100, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
 222         PFUZE100_SW_REG(PFUZE100, SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000),
 223         PFUZE100_SWB_REG(PFUZE100, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
 224         PFUZE100_SWB_REG(PFUZE100, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
 225         PFUZE100_FIXED_REG(PFUZE100, VREFDDR, PFUZE100_VREFDDRCON, 750000),
 226         PFUZE100_VGEN_REG(PFUZE100, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
 227         PFUZE100_VGEN_REG(PFUZE100, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
 228         PFUZE100_VGEN_REG(PFUZE100, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
 229         PFUZE100_VGEN_REG(PFUZE100, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
 230         PFUZE100_VGEN_REG(PFUZE100, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
 231         PFUZE100_VGEN_REG(PFUZE100, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
 232 };
 233
 234 static struct pfuze_regulator pfuze200_regulators[] = {
 235         PFUZE100_SW_REG(PFUZE200, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
 236         PFUZE100_SW_REG(PFUZE200, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
 237         PFUZE100_SW_REG(PFUZE200, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
 238         PFUZE100_SW_REG(PFUZE200, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
 239         PFUZE100_SWB_REG(PFUZE200, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
 240         PFUZE100_SWB_REG(PFUZE200, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
 241         PFUZE100_FIXED_REG(PFUZE200, VREFDDR, PFUZE100_VREFDDRCON, 750000),
 242         PFUZE100_VGEN_REG(PFUZE200, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
 243         PFUZE100_VGEN_REG(PFUZE200, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
 244         PFUZE100_VGEN_REG(PFUZE200, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
 245         PFUZE100_VGEN_REG(PFUZE200, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
 246         PFUZE100_VGEN_REG(PFUZE200, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
 247         PFUZE100_VGEN_REG(PFUZE200, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
 248 };
 249
 250 static struct pfuze_regulator *pfuze_regulators;
 251
 252 #ifdef CONFIG_OF
 253 /* PFUZE100 */
 254 static struct of_regulator_match pfuze100_matches[] = {
 255         { .name = "sw1ab",      },
 256         { .name = "sw1c",       },
 257         { .name = "sw2",        },
 258         { .name = "sw3a",       },
 259         { .name = "sw3b",       },
 260         { .name = "sw4",        },
 261         { .name = "swbst",      },
 262         { .name = "vsnvs",      },
 263         { .name = "vrefddr",    },
 264         { .name = "vgen1",      },
 265         { .name = "vgen2",      },
 266         { .name = "vgen3",      },
 267         { .name = "vgen4",      },
 268         { .name = "vgen5",      },
 269         { .name = "vgen6",      },
 270 };
 271
 272 /* PFUZE200 */
 273 static struct of_regulator_match pfuze200_matches[] = {
 274
 275         { .name = "sw1ab",      },
 276         { .name = "sw2",        },
 277         { .name = "sw3a",       },
 278         { .name = "sw3b",       },
 279         { .name = "swbst",      },
 280         { .name = "vsnvs",      },
 281         { .name = "vrefddr",    },
 282         { .name = "vgen1",      },
 283         { .name = "vgen2",      },
 284         { .name = "vgen3",      },
 285         { .name = "vgen4",      },
 286         { .name = "vgen5",      },
 287         { .name = "vgen6",      },
 288 };
 289
 290 static struct of_regulator_match *pfuze_matches;
 291
 292 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
 293 {
 294         struct device *dev = chip->dev;
 295         struct device_node *np, *parent;
 296         int ret;
 297
 298         np = of_node_get(dev->of_node);
 299         if (!np)
 300                 return -EINVAL;
 301
 302         parent = of_get_child_by_name(np, "regulators");
 303         if (!parent) {
 304                 dev_err(dev, "regulators node not found\n");
 305                 return -EINVAL;
 306         }
 307
 308         switch (chip->chip_id) {
 309         case PFUZE200:
 310                 pfuze_matches = pfuze200_matches;
 311                 ret = of_regulator_match(dev, parent, pfuze200_matches,
 312                                          ARRAY_SIZE(pfuze200_matches));
 313                 break;
 314
 315         case PFUZE100:
 316         default:
 317                 pfuze_matches = pfuze100_matches;
 318                 ret = of_regulator_match(dev, parent, pfuze100_matches,
 319                                          ARRAY_SIZE(pfuze100_matches));
 320                 break;
 321         }
 322
 323         of_node_put(parent);
 324         if (ret < 0) {
 325                 dev_err(dev, "Error parsing regulator init data: %d\n",
 326                         ret);
 327                 return ret;
 328         }
 329
 330         return 0;
 331 }
 332
 333 static inline struct regulator_init_data *match_init_data(int index)
 334 {
 335         return pfuze_matches[index].init_data;
 336 }
 337
 338 static inline struct device_node *match_of_node(int index)
 339 {
 340         return pfuze_matches[index].of_node;
 341 }
 342 #else
 343 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
 344 {
 345         return 0;
 346 }
 347
 348 static inline struct regulator_init_data *match_init_data(int index)
 349 {
 350         return NULL;
 351 }
 352
 353 static inline struct device_node *match_of_node(int index)
 354 {
 355         return NULL;
 356 }
 357 #endif
 358
 359 static int pfuze_identify(struct pfuze_chip *pfuze_chip)
 360 {
 361         unsigned int value;
 362         int ret;
 363
 364         ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value);
 365         if (ret)
 366                 return ret;
 367
 368         if (((value & 0x0f) == 0x8) && (pfuze_chip->chip_id == PFUZE100)) {
 369                 /*
 370                  * Freescale misprogrammed 1-3% of parts prior to week 8 of 2013
 371                  * as ID=8 in PFUZE100
 372                  */
 373                 dev_info(pfuze_chip->dev, "Assuming misprogrammed ID=0x8");
 374         } else if ((value & 0x0f) != pfuze_chip->chip_id) {
 375                 /* device id NOT match with your setting */
 376                 dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
 377                 return -ENODEV;
 378         }
 379
 380         ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);
 381         if (ret)
 382                 return ret;
 383         dev_info(pfuze_chip->dev,
 384                  "Full layer: %x, Metal layer: %x\n",
 385                  (value & 0xf0) >> 4, value & 0x0f);
 386
 387         ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value);
 388         if (ret)
 389                 return ret;
 390         dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n",
 391                  (value & 0xc) >> 2, value & 0x3);
 392
 393         return 0;
 394 }
 395
 396 static const struct regmap_config pfuze_regmap_config = {
 397         .reg_bits = 8,
 398         .val_bits = 8,
 399         .max_register = PFUZE_NUMREGS - 1,
 400         .cache_type = REGCACHE_RBTREE,
 401 };
 402
 403 static int pfuze100_regulator_probe(struct i2c_client *client,
 404                                     const struct i2c_device_id *id)
 405 {
 406         struct pfuze_chip *pfuze_chip;
 407         struct pfuze_regulator_platform_data *pdata =
 408             dev_get_platdata(&client->dev);
 409         struct regulator_config config = { };
 410         int i, ret;
 411         const struct of_device_id *match;
 412         u32 regulator_num;
 413         u32 sw_check_start, sw_check_end;
 414
 415         pfuze_chip = devm_kzalloc(&client->dev, sizeof(*pfuze_chip),
 416                         GFP_KERNEL);
 417         if (!pfuze_chip)
 418                 return -ENOMEM;
 419
 420         if (client->dev.of_node) {
 421                 match = of_match_device(of_match_ptr(pfuze_dt_ids),
 422                                 &client->dev);
 423                 if (!match) {
 424                         dev_err(&client->dev, "Error: No device match found\n");
 425                         return -ENODEV;
 426                 }
 427                 pfuze_chip->chip_id = (int)(long)match->data;
 428         } else if (id) {
 429                 pfuze_chip->chip_id = id->driver_data;
 430         } else {
 431                 dev_err(&client->dev, "No dts match or id table match found\n");
 432                 return -ENODEV;
 433         }
 434
 435         i2c_set_clientdata(client, pfuze_chip);
 436         pfuze_chip->dev = &client->dev;
 437
 438         pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config);
 439         if (IS_ERR(pfuze_chip->regmap)) {
 440                 ret = PTR_ERR(pfuze_chip->regmap);
 441                 dev_err(&client->dev,
 442                         "regmap allocation failed with err %d\n", ret);
 443                 return ret;
 444         }
 445
 446         ret = pfuze_identify(pfuze_chip);
 447         if (ret) {
 448                 dev_err(&client->dev, "unrecognized pfuze chip ID!\n");
 449                 return ret;
 450         }
 451
 452         /* use the right regulators after identify the right device */
 453         switch (pfuze_chip->chip_id) {
 454         case PFUZE200:
 455                 pfuze_regulators = pfuze200_regulators;
 456                 regulator_num = ARRAY_SIZE(pfuze200_regulators);
 457                 sw_check_start = PFUZE200_SW2;
 458                 sw_check_end = PFUZE200_SW3B;
 459                 break;
 460
 461         case PFUZE100:
 462         default:
 463                 pfuze_regulators = pfuze100_regulators;
 464                 regulator_num = ARRAY_SIZE(pfuze100_regulators);
 465                 sw_check_start = PFUZE100_SW2;
 466                 sw_check_end = PFUZE100_SW4;
 467                 break;
 468         }
 469         dev_info(&client->dev, "pfuze%s found.\n",
 470                 (pfuze_chip->chip_id == PFUZE100) ? "100" : "200");
 471
 472         memcpy(pfuze_chip->regulator_descs, pfuze_regulators,
 473                 sizeof(pfuze_chip->regulator_descs));
 474
 475         ret = pfuze_parse_regulators_dt(pfuze_chip);
 476         if (ret)
 477                 return ret;
 478
 479         for (i = 0; i < regulator_num; i++) {
 480                 struct regulator_init_data *init_data;
 481                 struct regulator_desc *desc;
 482                 int val;
 483
 484                 desc = &pfuze_chip->regulator_descs[i].desc;
 485
 486                 if (pdata)
 487                         init_data = pdata->init_data[i];
 488                 else
 489                         init_data = match_init_data(i);
 490
 491                 /* SW2~SW4 high bit check and modify the voltage value table */
 492                 if (i >= sw_check_start && i <= sw_check_end) {
 493                         regmap_read(pfuze_chip->regmap, desc->vsel_reg, &val);
 494                         if (val & 0x40) {
 495                                 desc->min_uV = 800000;
 496                                 desc->uV_step = 50000;
 497                                 desc->n_voltages = 51;
 498                         }
 499                 }
 500
 501                 config.dev = &client->dev;
 502                 config.init_data = init_data;
 503                 config.driver_data = pfuze_chip;
 504                 config.of_node = match_of_node(i);
 505
 506                 pfuze_chip->regulators[i] =
 507                         devm_regulator_register(&client->dev, desc, &config);
 508                 if (IS_ERR(pfuze_chip->regulators[i])) {
 509                         dev_err(&client->dev, "register regulator%s failed\n",
 510                                 pfuze_regulators[i].desc.name);
 511                         return PTR_ERR(pfuze_chip->regulators[i]);
 512                 }
 513         }
 514
 515         return 0;
 516 }
 517
 518 static struct i2c_driver pfuze_driver = {
 519         .id_table = pfuze_device_id,
 520         .driver = {
 521                 .name = "pfuze100-regulator",
 522                 .owner = THIS_MODULE,
 523                 .of_match_table = pfuze_dt_ids,
 524         },
 525         .probe = pfuze100_regulator_probe,
 526 };
 527 module_i2c_driver(pfuze_driver);
 528
 529 MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
 530 MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100/PFUZE200 PMIC");
 531 MODULE_LICENSE("GPL v2");
 532 MODULE_ALIAS("i2c:pfuze100-regulator");