drivers/regulator/as3722-regulator.c

   1 /*
   2  * Voltage regulator support for AMS AS3722 PMIC
   3  *
   4  * Copyright (C) 2013 ams
   5  *
   6  * Author: Florian Lobmaier <florian.lobmaier@ams.com>
   7  * Author: Laxman Dewangan <ldewangan@nvidia.com>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  22  *
  23  */
  24
  25 #include <linux/err.h>
  26 #include <linux/kernel.h>
  27 #include <linux/module.h>
  28 #include <linux/mfd/as3722.h>
  29 #include <linux/of.h>
  30 #include <linux/of_platform.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/regulator/driver.h>
  33 #include <linux/regulator/machine.h>
  34 #include <linux/regulator/of_regulator.h>
  35 #include <linux/slab.h>
  36
  37 /* Regulator IDs */
  38 enum as3722_regulators_id {
  39         AS3722_REGULATOR_ID_SD0,
  40         AS3722_REGULATOR_ID_SD1,
  41         AS3722_REGULATOR_ID_SD2,
  42         AS3722_REGULATOR_ID_SD3,
  43         AS3722_REGULATOR_ID_SD4,
  44         AS3722_REGULATOR_ID_SD5,
  45         AS3722_REGULATOR_ID_SD6,
  46         AS3722_REGULATOR_ID_LDO0,
  47         AS3722_REGULATOR_ID_LDO1,
  48         AS3722_REGULATOR_ID_LDO2,
  49         AS3722_REGULATOR_ID_LDO3,
  50         AS3722_REGULATOR_ID_LDO4,
  51         AS3722_REGULATOR_ID_LDO5,
  52         AS3722_REGULATOR_ID_LDO6,
  53         AS3722_REGULATOR_ID_LDO7,
  54         AS3722_REGULATOR_ID_LDO9,
  55         AS3722_REGULATOR_ID_LDO10,
  56         AS3722_REGULATOR_ID_LDO11,
  57         AS3722_REGULATOR_ID_MAX,
  58 };
  59
  60 struct as3722_register_mapping {
  61         u8 regulator_id;
  62         const char *name;
  63         const char *sname;
  64         u8 vsel_reg;
  65         u8 vsel_mask;
  66         int n_voltages;
  67         u32 enable_reg;
  68         u8 enable_mask;
  69         u32 control_reg;
  70         u8 mode_mask;
  71         u32 sleep_ctrl_reg;
  72         u8 sleep_ctrl_mask;
  73 };
  74
  75 struct as3722_regulator_config_data {
  76         struct regulator_init_data *reg_init;
  77         bool enable_tracking;
  78         int ext_control;
  79 };
  80
  81 struct as3722_regulators {
  82         struct device *dev;
  83         struct as3722 *as3722;
  84         struct regulator_dev *rdevs[AS3722_REGULATOR_ID_MAX];
  85         struct regulator_desc desc[AS3722_REGULATOR_ID_MAX];
  86         struct as3722_regulator_config_data
  87                         reg_config_data[AS3722_REGULATOR_ID_MAX];
  88 };
  89
  90 static const struct as3722_register_mapping as3722_reg_lookup[] = {
  91         {
  92                 .regulator_id = AS3722_REGULATOR_ID_SD0,
  93                 .name = "as3722-sd0",
  94                 .vsel_reg = AS3722_SD0_VOLTAGE_REG,
  95                 .vsel_mask = AS3722_SD_VSEL_MASK,
  96                 .enable_reg = AS3722_SD_CONTROL_REG,
  97                 .enable_mask = AS3722_SDn_CTRL(0),
  98                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
  99                 .sleep_ctrl_mask = AS3722_SD0_EXT_ENABLE_MASK,
 100                 .control_reg = AS3722_SD0_CONTROL_REG,
 101                 .mode_mask = AS3722_SD0_MODE_FAST,
 102                 .n_voltages = AS3722_SD0_VSEL_MAX + 1,
 103         },
 104         {
 105                 .regulator_id = AS3722_REGULATOR_ID_SD1,
 106                 .name = "as3722-sd1",
 107                 .vsel_reg = AS3722_SD1_VOLTAGE_REG,
 108                 .vsel_mask = AS3722_SD_VSEL_MASK,
 109                 .enable_reg = AS3722_SD_CONTROL_REG,
 110                 .enable_mask = AS3722_SDn_CTRL(1),
 111                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
 112                 .sleep_ctrl_mask = AS3722_SD1_EXT_ENABLE_MASK,
 113                 .control_reg = AS3722_SD1_CONTROL_REG,
 114                 .mode_mask = AS3722_SD1_MODE_FAST,
 115                 .n_voltages = AS3722_SD0_VSEL_MAX + 1,
 116         },
 117         {
 118                 .regulator_id = AS3722_REGULATOR_ID_SD2,
 119                 .name = "as3722-sd2",
 120                 .sname = "vsup-sd2",
 121                 .vsel_reg = AS3722_SD2_VOLTAGE_REG,
 122                 .vsel_mask = AS3722_SD_VSEL_MASK,
 123                 .enable_reg = AS3722_SD_CONTROL_REG,
 124                 .enable_mask = AS3722_SDn_CTRL(2),
 125                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
 126                 .sleep_ctrl_mask = AS3722_SD2_EXT_ENABLE_MASK,
 127                 .control_reg = AS3722_SD23_CONTROL_REG,
 128                 .mode_mask = AS3722_SD2_MODE_FAST,
 129                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
 130         },
 131         {
 132                 .regulator_id = AS3722_REGULATOR_ID_SD3,
 133                 .name = "as3722-sd3",
 134                 .sname = "vsup-sd3",
 135                 .vsel_reg = AS3722_SD3_VOLTAGE_REG,
 136                 .vsel_mask = AS3722_SD_VSEL_MASK,
 137                 .enable_reg = AS3722_SD_CONTROL_REG,
 138                 .enable_mask = AS3722_SDn_CTRL(3),
 139                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
 140                 .sleep_ctrl_mask = AS3722_SD3_EXT_ENABLE_MASK,
 141                 .control_reg = AS3722_SD23_CONTROL_REG,
 142                 .mode_mask = AS3722_SD3_MODE_FAST,
 143                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
 144         },
 145         {
 146                 .regulator_id = AS3722_REGULATOR_ID_SD4,
 147                 .name = "as3722-sd4",
 148                 .sname = "vsup-sd4",
 149                 .vsel_reg = AS3722_SD4_VOLTAGE_REG,
 150                 .vsel_mask = AS3722_SD_VSEL_MASK,
 151                 .enable_reg = AS3722_SD_CONTROL_REG,
 152                 .enable_mask = AS3722_SDn_CTRL(4),
 153                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
 154                 .sleep_ctrl_mask = AS3722_SD4_EXT_ENABLE_MASK,
 155                 .control_reg = AS3722_SD4_CONTROL_REG,
 156                 .mode_mask = AS3722_SD4_MODE_FAST,
 157                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
 158         },
 159         {
 160                 .regulator_id = AS3722_REGULATOR_ID_SD5,
 161                 .name = "as3722-sd5",
 162                 .sname = "vsup-sd5",
 163                 .vsel_reg = AS3722_SD5_VOLTAGE_REG,
 164                 .vsel_mask = AS3722_SD_VSEL_MASK,
 165                 .enable_reg = AS3722_SD_CONTROL_REG,
 166                 .enable_mask = AS3722_SDn_CTRL(5),
 167                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
 168                 .sleep_ctrl_mask = AS3722_SD5_EXT_ENABLE_MASK,
 169                 .control_reg = AS3722_SD5_CONTROL_REG,
 170                 .mode_mask = AS3722_SD5_MODE_FAST,
 171                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
 172         },
 173         {
 174                 .regulator_id = AS3722_REGULATOR_ID_SD6,
 175                 .name = "as3722-sd6",
 176                 .vsel_reg = AS3722_SD6_VOLTAGE_REG,
 177                 .vsel_mask = AS3722_SD_VSEL_MASK,
 178                 .enable_reg = AS3722_SD_CONTROL_REG,
 179                 .enable_mask = AS3722_SDn_CTRL(6),
 180                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
 181                 .sleep_ctrl_mask = AS3722_SD6_EXT_ENABLE_MASK,
 182                 .control_reg = AS3722_SD6_CONTROL_REG,
 183                 .mode_mask = AS3722_SD6_MODE_FAST,
 184                 .n_voltages = AS3722_SD0_VSEL_MAX + 1,
 185         },
 186         {
 187                 .regulator_id = AS3722_REGULATOR_ID_LDO0,
 188                 .name = "as3722-ldo0",
 189                 .sname = "vin-ldo0",
 190                 .vsel_reg = AS3722_LDO0_VOLTAGE_REG,
 191                 .vsel_mask = AS3722_LDO0_VSEL_MASK,
 192                 .enable_reg = AS3722_LDOCONTROL0_REG,
 193                 .enable_mask = AS3722_LDO0_CTRL,
 194                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
 195                 .sleep_ctrl_mask = AS3722_LDO0_EXT_ENABLE_MASK,
 196                 .n_voltages = AS3722_LDO0_NUM_VOLT,
 197         },
 198         {
 199                 .regulator_id = AS3722_REGULATOR_ID_LDO1,
 200                 .name = "as3722-ldo1",
 201                 .sname = "vin-ldo1-6",
 202                 .vsel_reg = AS3722_LDO1_VOLTAGE_REG,
 203                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 204                 .enable_reg = AS3722_LDOCONTROL0_REG,
 205                 .enable_mask = AS3722_LDO1_CTRL,
 206                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
 207                 .sleep_ctrl_mask = AS3722_LDO1_EXT_ENABLE_MASK,
 208                 .n_voltages = AS3722_LDO_NUM_VOLT,
 209         },
 210         {
 211                 .regulator_id = AS3722_REGULATOR_ID_LDO2,
 212                 .name = "as3722-ldo2",
 213                 .sname = "vin-ldo2-5-7",
 214                 .vsel_reg = AS3722_LDO2_VOLTAGE_REG,
 215                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 216                 .enable_reg = AS3722_LDOCONTROL0_REG,
 217                 .enable_mask = AS3722_LDO2_CTRL,
 218                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
 219                 .sleep_ctrl_mask = AS3722_LDO2_EXT_ENABLE_MASK,
 220                 .n_voltages = AS3722_LDO_NUM_VOLT,
 221         },
 222         {
 223                 .regulator_id = AS3722_REGULATOR_ID_LDO3,
 224                 .name = "as3722-ldo3",
 225                 .name = "vin-ldo3-4",
 226                 .vsel_reg = AS3722_LDO3_VOLTAGE_REG,
 227                 .vsel_mask = AS3722_LDO3_VSEL_MASK,
 228                 .enable_reg = AS3722_LDOCONTROL0_REG,
 229                 .enable_mask = AS3722_LDO3_CTRL,
 230                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
 231                 .sleep_ctrl_mask = AS3722_LDO3_EXT_ENABLE_MASK,
 232                 .n_voltages = AS3722_LDO3_NUM_VOLT,
 233         },
 234         {
 235                 .regulator_id = AS3722_REGULATOR_ID_LDO4,
 236                 .name = "as3722-ldo4",
 237                 .name = "vin-ldo3-4",
 238                 .vsel_reg = AS3722_LDO4_VOLTAGE_REG,
 239                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 240                 .enable_reg = AS3722_LDOCONTROL0_REG,
 241                 .enable_mask = AS3722_LDO4_CTRL,
 242                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
 243                 .sleep_ctrl_mask = AS3722_LDO4_EXT_ENABLE_MASK,
 244                 .n_voltages = AS3722_LDO_NUM_VOLT,
 245         },
 246         {
 247                 .regulator_id = AS3722_REGULATOR_ID_LDO5,
 248                 .name = "as3722-ldo5",
 249                 .sname = "vin-ldo2-5-7",
 250                 .vsel_reg = AS3722_LDO5_VOLTAGE_REG,
 251                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 252                 .enable_reg = AS3722_LDOCONTROL0_REG,
 253                 .enable_mask = AS3722_LDO5_CTRL,
 254                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
 255                 .sleep_ctrl_mask = AS3722_LDO5_EXT_ENABLE_MASK,
 256                 .n_voltages = AS3722_LDO_NUM_VOLT,
 257         },
 258         {
 259                 .regulator_id = AS3722_REGULATOR_ID_LDO6,
 260                 .name = "as3722-ldo6",
 261                 .sname = "vin-ldo1-6",
 262                 .vsel_reg = AS3722_LDO6_VOLTAGE_REG,
 263                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 264                 .enable_reg = AS3722_LDOCONTROL0_REG,
 265                 .enable_mask = AS3722_LDO6_CTRL,
 266                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
 267                 .sleep_ctrl_mask = AS3722_LDO6_EXT_ENABLE_MASK,
 268                 .n_voltages = AS3722_LDO_NUM_VOLT,
 269         },
 270         {
 271                 .regulator_id = AS3722_REGULATOR_ID_LDO7,
 272                 .name = "as3722-ldo7",
 273                 .sname = "vin-ldo2-5-7",
 274                 .vsel_reg = AS3722_LDO7_VOLTAGE_REG,
 275                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 276                 .enable_reg = AS3722_LDOCONTROL0_REG,
 277                 .enable_mask = AS3722_LDO7_CTRL,
 278                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
 279                 .sleep_ctrl_mask = AS3722_LDO7_EXT_ENABLE_MASK,
 280                 .n_voltages = AS3722_LDO_NUM_VOLT,
 281         },
 282         {
 283                 .regulator_id = AS3722_REGULATOR_ID_LDO9,
 284                 .name = "as3722-ldo9",
 285                 .sname = "vin-ldo9-10",
 286                 .vsel_reg = AS3722_LDO9_VOLTAGE_REG,
 287                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 288                 .enable_reg = AS3722_LDOCONTROL1_REG,
 289                 .enable_mask = AS3722_LDO9_CTRL,
 290                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
 291                 .sleep_ctrl_mask = AS3722_LDO9_EXT_ENABLE_MASK,
 292                 .n_voltages = AS3722_LDO_NUM_VOLT,
 293         },
 294         {
 295                 .regulator_id = AS3722_REGULATOR_ID_LDO10,
 296                 .name = "as3722-ldo10",
 297                 .sname = "vin-ldo9-10",
 298                 .vsel_reg = AS3722_LDO10_VOLTAGE_REG,
 299                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 300                 .enable_reg = AS3722_LDOCONTROL1_REG,
 301                 .enable_mask = AS3722_LDO10_CTRL,
 302                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
 303                 .sleep_ctrl_mask = AS3722_LDO10_EXT_ENABLE_MASK,
 304                 .n_voltages = AS3722_LDO_NUM_VOLT,
 305         },
 306         {
 307                 .regulator_id = AS3722_REGULATOR_ID_LDO11,
 308                 .name = "as3722-ldo11",
 309                 .sname = "vin-ldo11",
 310                 .vsel_reg = AS3722_LDO11_VOLTAGE_REG,
 311                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 312                 .enable_reg = AS3722_LDOCONTROL1_REG,
 313                 .enable_mask = AS3722_LDO11_CTRL,
 314                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
 315                 .sleep_ctrl_mask = AS3722_LDO11_EXT_ENABLE_MASK,
 316                 .n_voltages = AS3722_LDO_NUM_VOLT,
 317         },
 318 };
 319
 320
 321 static const int as3722_ldo_current[] = { 150000, 300000 };
 322 static const int as3722_sd016_current[] = { 2500000, 3000000, 3500000 };
 323
 324 static int as3722_current_to_index(int min_uA, int max_uA,
 325                 const int *curr_table, int n_currents)
 326 {
 327         int i;
 328
 329         for (i = n_currents - 1; i >= 0; i--) {
 330                 if ((min_uA <= curr_table[i]) && (curr_table[i] <= max_uA))
 331                         return i;
 332         }
 333         return -EINVAL;
 334 }
 335
 336 static int as3722_ldo_get_current_limit(struct regulator_dev *rdev)
 337 {
 338         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 339         struct as3722 *as3722 = as3722_regs->as3722;
 340         int id = rdev_get_id(rdev);
 341         u32 val;
 342         int ret;
 343
 344         ret = as3722_read(as3722, as3722_reg_lookup[id].vsel_reg, &val);
 345         if (ret < 0) {
 346                 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
 347                         as3722_reg_lookup[id].vsel_reg, ret);
 348                 return ret;
 349         }
 350         if (val & AS3722_LDO_ILIMIT_MASK)
 351                 return 300000;
 352         return 150000;
 353 }
 354
 355 static int as3722_ldo_set_current_limit(struct regulator_dev *rdev,
 356                 int min_uA, int max_uA)
 357 {
 358         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 359         struct as3722 *as3722 = as3722_regs->as3722;
 360         int id = rdev_get_id(rdev);
 361         int ret;
 362         u32 reg = 0;
 363
 364         ret = as3722_current_to_index(min_uA, max_uA, as3722_ldo_current,
 365                                 ARRAY_SIZE(as3722_ldo_current));
 366         if (ret < 0) {
 367                 dev_err(as3722_regs->dev,
 368                         "Current range min:max = %d:%d does not support\n",
 369                         min_uA, max_uA);
 370                 return ret;
 371         }
 372         if (ret)
 373                 reg = AS3722_LDO_ILIMIT_BIT;
 374         return as3722_update_bits(as3722, as3722_reg_lookup[id].vsel_reg,
 375                         AS3722_LDO_ILIMIT_MASK, reg);
 376 }
 377
 378 static struct regulator_ops as3722_ldo0_ops = {
 379         .is_enabled = regulator_is_enabled_regmap,
 380         .enable = regulator_enable_regmap,
 381         .disable = regulator_disable_regmap,
 382         .list_voltage = regulator_list_voltage_linear,
 383         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 384         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 385         .get_current_limit = as3722_ldo_get_current_limit,
 386         .set_current_limit = as3722_ldo_set_current_limit,
 387 };
 388
 389 static struct regulator_ops as3722_ldo0_extcntrl_ops = {
 390         .list_voltage = regulator_list_voltage_linear,
 391         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 392         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 393         .get_current_limit = as3722_ldo_get_current_limit,
 394         .set_current_limit = as3722_ldo_set_current_limit,
 395 };
 396
 397 static int as3722_ldo3_set_tracking_mode(struct as3722_regulators *as3722_reg,
 398                 int id, u8 mode)
 399 {
 400         struct as3722 *as3722 = as3722_reg->as3722;
 401
 402         switch (mode) {
 403         case AS3722_LDO3_MODE_PMOS:
 404         case AS3722_LDO3_MODE_PMOS_TRACKING:
 405         case AS3722_LDO3_MODE_NMOS:
 406         case AS3722_LDO3_MODE_SWITCH:
 407                 return as3722_update_bits(as3722,
 408                         as3722_reg_lookup[id].vsel_reg,
 409                         AS3722_LDO3_MODE_MASK, mode);
 410
 411         default:
 412                 return -EINVAL;
 413         }
 414 }
 415
 416 static int as3722_ldo3_get_current_limit(struct regulator_dev *rdev)
 417 {
 418         return 150000;
 419 }
 420
 421 static struct regulator_ops as3722_ldo3_ops = {
 422         .is_enabled = regulator_is_enabled_regmap,
 423         .enable = regulator_enable_regmap,
 424         .disable = regulator_disable_regmap,
 425         .list_voltage = regulator_list_voltage_linear,
 426         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 427         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 428         .get_current_limit = as3722_ldo3_get_current_limit,
 429 };
 430
 431 static struct regulator_ops as3722_ldo3_extcntrl_ops = {
 432         .list_voltage = regulator_list_voltage_linear,
 433         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 434         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 435         .get_current_limit = as3722_ldo3_get_current_limit,
 436 };
 437
 438 static const struct regulator_linear_range as3722_ldo_ranges[] = {
 439         REGULATOR_LINEAR_RANGE(825000, 0x01, 0x24, 25000),
 440         REGULATOR_LINEAR_RANGE(1725000, 0x40, 0x7F, 25000),
 441 };
 442
 443 static struct regulator_ops as3722_ldo_ops = {
 444         .is_enabled = regulator_is_enabled_regmap,
 445         .enable = regulator_enable_regmap,
 446         .disable = regulator_disable_regmap,
 447         .map_voltage = regulator_map_voltage_linear_range,
 448         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 449         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 450         .list_voltage = regulator_list_voltage_linear_range,
 451         .get_current_limit = as3722_ldo_get_current_limit,
 452         .set_current_limit = as3722_ldo_set_current_limit,
 453 };
 454
 455 static struct regulator_ops as3722_ldo_extcntrl_ops = {
 456         .map_voltage = regulator_map_voltage_linear_range,
 457         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 458         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 459         .list_voltage = regulator_list_voltage_linear_range,
 460         .get_current_limit = as3722_ldo_get_current_limit,
 461         .set_current_limit = as3722_ldo_set_current_limit,
 462 };
 463
 464 static unsigned int as3722_sd_get_mode(struct regulator_dev *rdev)
 465 {
 466         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 467         struct as3722 *as3722 = as3722_regs->as3722;
 468         int id = rdev_get_id(rdev);
 469         u32 val;
 470         int ret;
 471
 472         if (!as3722_reg_lookup[id].control_reg)
 473                 return -ENOTSUPP;
 474
 475         ret = as3722_read(as3722, as3722_reg_lookup[id].control_reg, &val);
 476         if (ret < 0) {
 477                 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
 478                         as3722_reg_lookup[id].control_reg, ret);
 479                 return ret;
 480         }
 481
 482         if (val & as3722_reg_lookup[id].mode_mask)
 483                 return REGULATOR_MODE_FAST;
 484         else
 485                 return REGULATOR_MODE_NORMAL;
 486 }
 487
 488 static int as3722_sd_set_mode(struct regulator_dev *rdev,
 489                 unsigned int mode)
 490 {
 491         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 492         struct as3722 *as3722 = as3722_regs->as3722;
 493         u8 id = rdev_get_id(rdev);
 494         u8 val = 0;
 495         int ret;
 496
 497         if (!as3722_reg_lookup[id].control_reg)
 498                 return -ERANGE;
 499
 500         switch (mode) {
 501         case REGULATOR_MODE_FAST:
 502                 val = as3722_reg_lookup[id].mode_mask;
 503         case REGULATOR_MODE_NORMAL: /* fall down */
 504                 break;
 505         default:
 506                 return -EINVAL;
 507         }
 508
 509         ret = as3722_update_bits(as3722, as3722_reg_lookup[id].control_reg,
 510                         as3722_reg_lookup[id].mode_mask, val);
 511         if (ret < 0) {
 512                 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
 513                         as3722_reg_lookup[id].control_reg, ret);
 514                 return ret;
 515         }
 516         return ret;
 517 }
 518
 519 static int as3722_sd016_get_current_limit(struct regulator_dev *rdev)
 520 {
 521         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 522         struct as3722 *as3722 = as3722_regs->as3722;
 523         int id = rdev_get_id(rdev);
 524         u32 val, reg;
 525         int mask;
 526         int ret;
 527
 528         switch (id) {
 529         case AS3722_REGULATOR_ID_SD0:
 530                 reg = AS3722_OVCURRENT_REG;
 531                 mask = AS3722_OVCURRENT_SD0_TRIP_MASK;
 532                 break;
 533         case AS3722_REGULATOR_ID_SD1:
 534                 reg = AS3722_OVCURRENT_REG;
 535                 mask = AS3722_OVCURRENT_SD1_TRIP_MASK;
 536                 break;
 537         case AS3722_REGULATOR_ID_SD6:
 538                 reg = AS3722_OVCURRENT_DEB_REG;
 539                 mask = AS3722_OVCURRENT_SD6_TRIP_MASK;
 540                 break;
 541         default:
 542                 return -EINVAL;
 543         }
 544         ret = as3722_read(as3722, reg, &val);
 545         if (ret < 0) {
 546                 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
 547                         reg, ret);
 548                 return ret;
 549         }
 550         val &= mask;
 551         val >>= ffs(mask) - 1;
 552         if (val == 3)
 553                 return -EINVAL;
 554         return as3722_sd016_current[val];
 555 }
 556
 557 static int as3722_sd016_set_current_limit(struct regulator_dev *rdev,
 558                 int min_uA, int max_uA)
 559 {
 560         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 561         struct as3722 *as3722 = as3722_regs->as3722;
 562         int id = rdev_get_id(rdev);
 563         int ret;
 564         int val;
 565         int mask;
 566         u32 reg;
 567
 568         ret = as3722_current_to_index(min_uA, max_uA, as3722_sd016_current,
 569                                 ARRAY_SIZE(as3722_sd016_current));
 570         if (ret < 0) {
 571                 dev_err(as3722_regs->dev,
 572                         "Current range min:max = %d:%d does not support\n",
 573                         min_uA, max_uA);
 574                 return ret;
 575         }
 576
 577         switch (id) {
 578         case AS3722_REGULATOR_ID_SD0:
 579                 reg = AS3722_OVCURRENT_REG;
 580                 mask = AS3722_OVCURRENT_SD0_TRIP_MASK;
 581                 break;
 582         case AS3722_REGULATOR_ID_SD1:
 583                 reg = AS3722_OVCURRENT_REG;
 584                 mask = AS3722_OVCURRENT_SD1_TRIP_MASK;
 585                 break;
 586         case AS3722_REGULATOR_ID_SD6:
 587                 reg = AS3722_OVCURRENT_DEB_REG;
 588                 mask = AS3722_OVCURRENT_SD6_TRIP_MASK;
 589                 break;
 590         default:
 591                 return -EINVAL;
 592         }
 593         ret <<= ffs(mask) - 1;
 594         val = ret & mask;
 595         return as3722_update_bits(as3722, reg, mask, val);
 596 }
 597
 598 static const struct regulator_linear_range as3722_sd2345_ranges[] = {
 599         REGULATOR_LINEAR_RANGE(612500, 0x01, 0x40, 12500),
 600         REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000),
 601         REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7F, 50000),
 602 };
 603
 604 static struct regulator_ops as3722_sd016_ops = {
 605         .is_enabled = regulator_is_enabled_regmap,
 606         .enable = regulator_enable_regmap,
 607         .disable = regulator_disable_regmap,
 608         .list_voltage = regulator_list_voltage_linear,
 609         .map_voltage = regulator_map_voltage_linear,
 610         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 611         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 612         .get_current_limit = as3722_sd016_get_current_limit,
 613         .set_current_limit = as3722_sd016_set_current_limit,
 614         .get_mode = as3722_sd_get_mode,
 615         .set_mode = as3722_sd_set_mode,
 616 };
 617
 618 static struct regulator_ops as3722_sd016_extcntrl_ops = {
 619         .list_voltage = regulator_list_voltage_linear,
 620         .map_voltage = regulator_map_voltage_linear,
 621         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 622         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 623         .get_current_limit = as3722_sd016_get_current_limit,
 624         .set_current_limit = as3722_sd016_set_current_limit,
 625         .get_mode = as3722_sd_get_mode,
 626         .set_mode = as3722_sd_set_mode,
 627 };
 628
 629 static struct regulator_ops as3722_sd2345_ops = {
 630         .is_enabled = regulator_is_enabled_regmap,
 631         .enable = regulator_enable_regmap,
 632         .disable = regulator_disable_regmap,
 633         .list_voltage = regulator_list_voltage_linear_range,
 634         .map_voltage = regulator_map_voltage_linear_range,
 635         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 636         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 637         .get_mode = as3722_sd_get_mode,
 638         .set_mode = as3722_sd_set_mode,
 639 };
 640
 641 static struct regulator_ops as3722_sd2345_extcntrl_ops = {
 642         .list_voltage = regulator_list_voltage_linear_range,
 643         .map_voltage = regulator_map_voltage_linear_range,
 644         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 645         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 646         .get_mode = as3722_sd_get_mode,
 647         .set_mode = as3722_sd_set_mode,
 648 };
 649
 650 static int as3722_extreg_init(struct as3722_regulators *as3722_regs, int id,
 651                 int ext_pwr_ctrl)
 652 {
 653         int ret;
 654         unsigned int val;
 655
 656         if ((ext_pwr_ctrl < AS3722_EXT_CONTROL_ENABLE1) ||
 657                 (ext_pwr_ctrl > AS3722_EXT_CONTROL_ENABLE3))
 658                 return -EINVAL;
 659
 660         val =  ext_pwr_ctrl << (ffs(as3722_reg_lookup[id].sleep_ctrl_mask) - 1);
 661         ret = as3722_update_bits(as3722_regs->as3722,
 662                         as3722_reg_lookup[id].sleep_ctrl_reg,
 663                         as3722_reg_lookup[id].sleep_ctrl_mask, val);
 664         if (ret < 0)
 665                 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
 666                         as3722_reg_lookup[id].sleep_ctrl_reg, ret);
 667         return ret;
 668 }
 669
 670 static struct of_regulator_match as3722_regulator_matches[] = {
 671         { .name = "sd0", },
 672         { .name = "sd1", },
 673         { .name = "sd2", },
 674         { .name = "sd3", },
 675         { .name = "sd4", },
 676         { .name = "sd5", },
 677         { .name = "sd6", },
 678         { .name = "ldo0", },
 679         { .name = "ldo1", },
 680         { .name = "ldo2", },
 681         { .name = "ldo3", },
 682         { .name = "ldo4", },
 683         { .name = "ldo5", },
 684         { .name = "ldo6", },
 685         { .name = "ldo7", },
 686         { .name = "ldo9", },
 687         { .name = "ldo10", },
 688         { .name = "ldo11", },
 689 };
 690
 691 static int as3722_get_regulator_dt_data(struct platform_device *pdev,
 692                 struct as3722_regulators *as3722_regs)
 693 {
 694         struct device_node *np;
 695         struct as3722_regulator_config_data *reg_config;
 696         u32 prop;
 697         int id;
 698         int ret;
 699
 700         np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
 701         if (!np) {
 702                 dev_err(&pdev->dev, "Device is not having regulators node\n");
 703                 return -ENODEV;
 704         }
 705         pdev->dev.of_node = np;
 706
 707         ret = of_regulator_match(&pdev->dev, np, as3722_regulator_matches,
 708                         ARRAY_SIZE(as3722_regulator_matches));
 709         if (ret < 0) {
 710                 dev_err(&pdev->dev, "Parsing of regulator node failed: %d\n",
 711                         ret);
 712                 return ret;
 713         }
 714
 715         for (id = 0; id < ARRAY_SIZE(as3722_regulator_matches); ++id) {
 716                 struct device_node *reg_node;
 717
 718                 reg_config = &as3722_regs->reg_config_data[id];
 719                 reg_config->reg_init = as3722_regulator_matches[id].init_data;
 720                 reg_node = as3722_regulator_matches[id].of_node;
 721
 722                 if (!reg_config->reg_init || !reg_node)
 723                         continue;
 724
 725                 ret = of_property_read_u32(reg_node, "ams,ext-control", &prop);
 726                 if (!ret) {
 727                         if (prop < 3)
 728                                 reg_config->ext_control = prop;
 729                         else
 730                                 dev_warn(&pdev->dev,
 731                                         "ext-control have invalid option: %u\n",
 732                                         prop);
 733                 }
 734                 reg_config->enable_tracking =
 735                         of_property_read_bool(reg_node, "ams,enable-tracking");
 736         }
 737         return 0;
 738 }
 739
 740 static int as3722_regulator_probe(struct platform_device *pdev)
 741 {
 742         struct as3722 *as3722 = dev_get_drvdata(pdev->dev.parent);
 743         struct as3722_regulators *as3722_regs;
 744         struct as3722_regulator_config_data *reg_config;
 745         struct regulator_dev *rdev;
 746         struct regulator_config config = { };
 747         struct regulator_ops *ops;
 748         int id;
 749         int ret;
 750
 751         as3722_regs = devm_kzalloc(&pdev->dev, sizeof(*as3722_regs),
 752                                 GFP_KERNEL);
 753         if (!as3722_regs)
 754                 return -ENOMEM;
 755
 756         as3722_regs->dev = &pdev->dev;
 757         as3722_regs->as3722 = as3722;
 758         platform_set_drvdata(pdev, as3722_regs);
 759
 760         ret = as3722_get_regulator_dt_data(pdev, as3722_regs);
 761         if (ret < 0)
 762                 return ret;
 763
 764         config.dev = &pdev->dev;
 765         config.driver_data = as3722_regs;
 766         config.regmap = as3722->regmap;
 767
 768         for (id = 0; id < AS3722_REGULATOR_ID_MAX; id++) {
 769                 reg_config = &as3722_regs->reg_config_data[id];
 770
 771                 as3722_regs->desc[id].name = as3722_reg_lookup[id].name;
 772                 as3722_regs->desc[id].supply_name = as3722_reg_lookup[id].sname;
 773                 as3722_regs->desc[id].id = as3722_reg_lookup[id].regulator_id;
 774                 as3722_regs->desc[id].n_voltages =
 775                                         as3722_reg_lookup[id].n_voltages;
 776                 as3722_regs->desc[id].type = REGULATOR_VOLTAGE;
 777                 as3722_regs->desc[id].owner = THIS_MODULE;
 778                 as3722_regs->desc[id].enable_reg =
 779                                         as3722_reg_lookup[id].enable_reg;
 780                 as3722_regs->desc[id].enable_mask =
 781                                         as3722_reg_lookup[id].enable_mask;
 782                 as3722_regs->desc[id].vsel_reg = as3722_reg_lookup[id].vsel_reg;
 783                 as3722_regs->desc[id].vsel_mask =
 784                                         as3722_reg_lookup[id].vsel_mask;
 785                 switch (id) {
 786                 case AS3722_REGULATOR_ID_LDO0:
 787                         if (reg_config->ext_control)
 788                                 ops = &as3722_ldo0_extcntrl_ops;
 789                         else
 790                                 ops = &as3722_ldo0_ops;
 791                         as3722_regs->desc[id].min_uV = 825000;
 792                         as3722_regs->desc[id].uV_step = 25000;
 793                         as3722_regs->desc[id].linear_min_sel = 1;
 794                         as3722_regs->desc[id].enable_time = 500;
 795                         break;
 796                 case AS3722_REGULATOR_ID_LDO3:
 797                         if (reg_config->ext_control)
 798                                 ops = &as3722_ldo3_extcntrl_ops;
 799                         else
 800                                 ops = &as3722_ldo3_ops;
 801                         as3722_regs->desc[id].min_uV = 620000;
 802                         as3722_regs->desc[id].uV_step = 20000;
 803                         as3722_regs->desc[id].linear_min_sel = 1;
 804                         as3722_regs->desc[id].enable_time = 500;
 805                         if (reg_config->enable_tracking) {
 806                                 ret = as3722_ldo3_set_tracking_mode(as3722_regs,
 807                                         id, AS3722_LDO3_MODE_PMOS_TRACKING);
 808                                 if (ret < 0) {
 809                                         dev_err(&pdev->dev,
 810                                                 "LDO3 tracking failed: %d\n",
 811                                                 ret);
 812                                         return ret;
 813                                 }
 814                         }
 815                         break;
 816                 case AS3722_REGULATOR_ID_SD0:
 817                 case AS3722_REGULATOR_ID_SD1:
 818                 case AS3722_REGULATOR_ID_SD6:
 819                         if (reg_config->ext_control)
 820                                 ops = &as3722_sd016_extcntrl_ops;
 821                         else
 822                                 ops = &as3722_sd016_ops;
 823                         as3722_regs->desc[id].min_uV = 610000;
 824                         as3722_regs->desc[id].uV_step = 10000;
 825                         as3722_regs->desc[id].linear_min_sel = 1;
 826                         break;
 827                 case AS3722_REGULATOR_ID_SD2:
 828                 case AS3722_REGULATOR_ID_SD3:
 829                 case AS3722_REGULATOR_ID_SD4:
 830                 case AS3722_REGULATOR_ID_SD5:
 831                         if (reg_config->ext_control)
 832                                 ops = &as3722_sd2345_extcntrl_ops;
 833                         else
 834                                 ops = &as3722_sd2345_ops;
 835                         as3722_regs->desc[id].linear_ranges =
 836                                                 as3722_sd2345_ranges;
 837                         as3722_regs->desc[id].n_linear_ranges =
 838                                         ARRAY_SIZE(as3722_sd2345_ranges);
 839                         break;
 840                 default:
 841                         if (reg_config->ext_control)
 842                                 ops = &as3722_ldo_extcntrl_ops;
 843                         else
 844                                 ops = &as3722_ldo_ops;
 845                         as3722_regs->desc[id].min_uV = 825000;
 846                         as3722_regs->desc[id].uV_step = 25000;
 847                         as3722_regs->desc[id].linear_min_sel = 1;
 848                         as3722_regs->desc[id].enable_time = 500;
 849                         as3722_regs->desc[id].linear_ranges = as3722_ldo_ranges;
 850                         as3722_regs->desc[id].n_linear_ranges =
 851                                                 ARRAY_SIZE(as3722_ldo_ranges);
 852                         break;
 853                 }
 854                 as3722_regs->desc[id].ops = ops;
 855                 config.init_data = reg_config->reg_init;
 856                 config.of_node = as3722_regulator_matches[id].of_node;
 857                 rdev = devm_regulator_register(&pdev->dev,
 858                                         &as3722_regs->desc[id], &config);
 859                 if (IS_ERR(rdev)) {
 860                         ret = PTR_ERR(rdev);
 861                         dev_err(&pdev->dev, "regulator %d register failed %d\n",
 862                                 id, ret);
 863                         return ret;
 864                 }
 865
 866                 as3722_regs->rdevs[id] = rdev;
 867                 if (reg_config->ext_control) {
 868                         ret = regulator_enable_regmap(rdev);
 869                         if (ret < 0) {
 870                                 dev_err(&pdev->dev,
 871                                         "Regulator %d enable failed: %d\n",
 872                                         id, ret);
 873                                 return ret;
 874                         }
 875                         ret = as3722_extreg_init(as3722_regs, id,
 876                                         reg_config->ext_control);
 877                         if (ret < 0) {
 878                                 dev_err(&pdev->dev,
 879                                         "AS3722 ext control failed: %d", ret);
 880                                 return ret;
 881                         }
 882                 }
 883         }
 884         return 0;
 885 }
 886
 887 static const struct of_device_id of_as3722_regulator_match[] = {
 888         { .compatible = "ams,as3722-regulator", },
 889         {},
 890 };
 891 MODULE_DEVICE_TABLE(of, of_as3722_regulator_match);
 892
 893 static struct platform_driver as3722_regulator_driver = {
 894         .driver = {
 895                 .name = "as3722-regulator",
 896                 .owner = THIS_MODULE,
 897                 .of_match_table = of_as3722_regulator_match,
 898         },
 899         .probe = as3722_regulator_probe,
 900 };
 901
 902 module_platform_driver(as3722_regulator_driver);
 903
 904 MODULE_ALIAS("platform:as3722-regulator");
 905 MODULE_DESCRIPTION("AS3722 regulator driver");
 906 MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>");
 907 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
 908 MODULE_LICENSE("GPL");