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         },
 103         {
 104                 .regulator_id = AS3722_REGULATOR_ID_SD1,
 105                 .name = "as3722-sd1",
 106                 .vsel_reg = AS3722_SD1_VOLTAGE_REG,
 107                 .vsel_mask = AS3722_SD_VSEL_MASK,
 108                 .enable_reg = AS3722_SD_CONTROL_REG,
 109                 .enable_mask = AS3722_SDn_CTRL(1),
 110                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
 111                 .sleep_ctrl_mask = AS3722_SD1_EXT_ENABLE_MASK,
 112                 .control_reg = AS3722_SD1_CONTROL_REG,
 113                 .mode_mask = AS3722_SD1_MODE_FAST,
 114         },
 115         {
 116                 .regulator_id = AS3722_REGULATOR_ID_SD2,
 117                 .name = "as3722-sd2",
 118                 .sname = "vsup-sd2",
 119                 .vsel_reg = AS3722_SD2_VOLTAGE_REG,
 120                 .vsel_mask = AS3722_SD_VSEL_MASK,
 121                 .enable_reg = AS3722_SD_CONTROL_REG,
 122                 .enable_mask = AS3722_SDn_CTRL(2),
 123                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
 124                 .sleep_ctrl_mask = AS3722_SD2_EXT_ENABLE_MASK,
 125                 .control_reg = AS3722_SD23_CONTROL_REG,
 126                 .mode_mask = AS3722_SD2_MODE_FAST,
 127                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
 128         },
 129         {
 130                 .regulator_id = AS3722_REGULATOR_ID_SD3,
 131                 .name = "as3722-sd3",
 132                 .sname = "vsup-sd3",
 133                 .vsel_reg = AS3722_SD3_VOLTAGE_REG,
 134                 .vsel_mask = AS3722_SD_VSEL_MASK,
 135                 .enable_reg = AS3722_SD_CONTROL_REG,
 136                 .enable_mask = AS3722_SDn_CTRL(3),
 137                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
 138                 .sleep_ctrl_mask = AS3722_SD3_EXT_ENABLE_MASK,
 139                 .control_reg = AS3722_SD23_CONTROL_REG,
 140                 .mode_mask = AS3722_SD3_MODE_FAST,
 141                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
 142         },
 143         {
 144                 .regulator_id = AS3722_REGULATOR_ID_SD4,
 145                 .name = "as3722-sd4",
 146                 .sname = "vsup-sd4",
 147                 .vsel_reg = AS3722_SD4_VOLTAGE_REG,
 148                 .vsel_mask = AS3722_SD_VSEL_MASK,
 149                 .enable_reg = AS3722_SD_CONTROL_REG,
 150                 .enable_mask = AS3722_SDn_CTRL(4),
 151                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
 152                 .sleep_ctrl_mask = AS3722_SD4_EXT_ENABLE_MASK,
 153                 .control_reg = AS3722_SD4_CONTROL_REG,
 154                 .mode_mask = AS3722_SD4_MODE_FAST,
 155                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
 156         },
 157         {
 158                 .regulator_id = AS3722_REGULATOR_ID_SD5,
 159                 .name = "as3722-sd5",
 160                 .sname = "vsup-sd5",
 161                 .vsel_reg = AS3722_SD5_VOLTAGE_REG,
 162                 .vsel_mask = AS3722_SD_VSEL_MASK,
 163                 .enable_reg = AS3722_SD_CONTROL_REG,
 164                 .enable_mask = AS3722_SDn_CTRL(5),
 165                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
 166                 .sleep_ctrl_mask = AS3722_SD5_EXT_ENABLE_MASK,
 167                 .control_reg = AS3722_SD5_CONTROL_REG,
 168                 .mode_mask = AS3722_SD5_MODE_FAST,
 169                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
 170         },
 171         {
 172                 .regulator_id = AS3722_REGULATOR_ID_SD6,
 173                 .name = "as3722-sd6",
 174                 .vsel_reg = AS3722_SD6_VOLTAGE_REG,
 175                 .vsel_mask = AS3722_SD_VSEL_MASK,
 176                 .enable_reg = AS3722_SD_CONTROL_REG,
 177                 .enable_mask = AS3722_SDn_CTRL(6),
 178                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
 179                 .sleep_ctrl_mask = AS3722_SD6_EXT_ENABLE_MASK,
 180                 .control_reg = AS3722_SD6_CONTROL_REG,
 181                 .mode_mask = AS3722_SD6_MODE_FAST,
 182         },
 183         {
 184                 .regulator_id = AS3722_REGULATOR_ID_LDO0,
 185                 .name = "as3722-ldo0",
 186                 .sname = "vin-ldo0",
 187                 .vsel_reg = AS3722_LDO0_VOLTAGE_REG,
 188                 .vsel_mask = AS3722_LDO0_VSEL_MASK,
 189                 .enable_reg = AS3722_LDOCONTROL0_REG,
 190                 .enable_mask = AS3722_LDO0_CTRL,
 191                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
 192                 .sleep_ctrl_mask = AS3722_LDO0_EXT_ENABLE_MASK,
 193                 .n_voltages = AS3722_LDO0_NUM_VOLT,
 194         },
 195         {
 196                 .regulator_id = AS3722_REGULATOR_ID_LDO1,
 197                 .name = "as3722-ldo1",
 198                 .sname = "vin-ldo1-6",
 199                 .vsel_reg = AS3722_LDO1_VOLTAGE_REG,
 200                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 201                 .enable_reg = AS3722_LDOCONTROL0_REG,
 202                 .enable_mask = AS3722_LDO1_CTRL,
 203                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
 204                 .sleep_ctrl_mask = AS3722_LDO1_EXT_ENABLE_MASK,
 205                 .n_voltages = AS3722_LDO_NUM_VOLT,
 206         },
 207         {
 208                 .regulator_id = AS3722_REGULATOR_ID_LDO2,
 209                 .name = "as3722-ldo2",
 210                 .sname = "vin-ldo2-5-7",
 211                 .vsel_reg = AS3722_LDO2_VOLTAGE_REG,
 212                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 213                 .enable_reg = AS3722_LDOCONTROL0_REG,
 214                 .enable_mask = AS3722_LDO2_CTRL,
 215                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
 216                 .sleep_ctrl_mask = AS3722_LDO2_EXT_ENABLE_MASK,
 217                 .n_voltages = AS3722_LDO_NUM_VOLT,
 218         },
 219         {
 220                 .regulator_id = AS3722_REGULATOR_ID_LDO3,
 221                 .name = "as3722-ldo3",
 222                 .name = "vin-ldo3-4",
 223                 .vsel_reg = AS3722_LDO3_VOLTAGE_REG,
 224                 .vsel_mask = AS3722_LDO3_VSEL_MASK,
 225                 .enable_reg = AS3722_LDOCONTROL0_REG,
 226                 .enable_mask = AS3722_LDO3_CTRL,
 227                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
 228                 .sleep_ctrl_mask = AS3722_LDO3_EXT_ENABLE_MASK,
 229                 .n_voltages = AS3722_LDO3_NUM_VOLT,
 230         },
 231         {
 232                 .regulator_id = AS3722_REGULATOR_ID_LDO4,
 233                 .name = "as3722-ldo4",
 234                 .name = "vin-ldo3-4",
 235                 .vsel_reg = AS3722_LDO4_VOLTAGE_REG,
 236                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 237                 .enable_reg = AS3722_LDOCONTROL0_REG,
 238                 .enable_mask = AS3722_LDO4_CTRL,
 239                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
 240                 .sleep_ctrl_mask = AS3722_LDO4_EXT_ENABLE_MASK,
 241                 .n_voltages = AS3722_LDO_NUM_VOLT,
 242         },
 243         {
 244                 .regulator_id = AS3722_REGULATOR_ID_LDO5,
 245                 .name = "as3722-ldo5",
 246                 .sname = "vin-ldo2-5-7",
 247                 .vsel_reg = AS3722_LDO5_VOLTAGE_REG,
 248                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 249                 .enable_reg = AS3722_LDOCONTROL0_REG,
 250                 .enable_mask = AS3722_LDO5_CTRL,
 251                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
 252                 .sleep_ctrl_mask = AS3722_LDO5_EXT_ENABLE_MASK,
 253                 .n_voltages = AS3722_LDO_NUM_VOLT,
 254         },
 255         {
 256                 .regulator_id = AS3722_REGULATOR_ID_LDO6,
 257                 .name = "as3722-ldo6",
 258                 .sname = "vin-ldo1-6",
 259                 .vsel_reg = AS3722_LDO6_VOLTAGE_REG,
 260                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 261                 .enable_reg = AS3722_LDOCONTROL0_REG,
 262                 .enable_mask = AS3722_LDO6_CTRL,
 263                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
 264                 .sleep_ctrl_mask = AS3722_LDO6_EXT_ENABLE_MASK,
 265                 .n_voltages = AS3722_LDO_NUM_VOLT,
 266         },
 267         {
 268                 .regulator_id = AS3722_REGULATOR_ID_LDO7,
 269                 .name = "as3722-ldo7",
 270                 .sname = "vin-ldo2-5-7",
 271                 .vsel_reg = AS3722_LDO7_VOLTAGE_REG,
 272                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 273                 .enable_reg = AS3722_LDOCONTROL0_REG,
 274                 .enable_mask = AS3722_LDO7_CTRL,
 275                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
 276                 .sleep_ctrl_mask = AS3722_LDO7_EXT_ENABLE_MASK,
 277                 .n_voltages = AS3722_LDO_NUM_VOLT,
 278         },
 279         {
 280                 .regulator_id = AS3722_REGULATOR_ID_LDO9,
 281                 .name = "as3722-ldo9",
 282                 .sname = "vin-ldo9-10",
 283                 .vsel_reg = AS3722_LDO9_VOLTAGE_REG,
 284                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 285                 .enable_reg = AS3722_LDOCONTROL1_REG,
 286                 .enable_mask = AS3722_LDO9_CTRL,
 287                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
 288                 .sleep_ctrl_mask = AS3722_LDO9_EXT_ENABLE_MASK,
 289                 .n_voltages = AS3722_LDO_NUM_VOLT,
 290         },
 291         {
 292                 .regulator_id = AS3722_REGULATOR_ID_LDO10,
 293                 .name = "as3722-ldo10",
 294                 .sname = "vin-ldo9-10",
 295                 .vsel_reg = AS3722_LDO10_VOLTAGE_REG,
 296                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 297                 .enable_reg = AS3722_LDOCONTROL1_REG,
 298                 .enable_mask = AS3722_LDO10_CTRL,
 299                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
 300                 .sleep_ctrl_mask = AS3722_LDO10_EXT_ENABLE_MASK,
 301                 .n_voltages = AS3722_LDO_NUM_VOLT,
 302         },
 303         {
 304                 .regulator_id = AS3722_REGULATOR_ID_LDO11,
 305                 .name = "as3722-ldo11",
 306                 .sname = "vin-ldo11",
 307                 .vsel_reg = AS3722_LDO11_VOLTAGE_REG,
 308                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 309                 .enable_reg = AS3722_LDOCONTROL1_REG,
 310                 .enable_mask = AS3722_LDO11_CTRL,
 311                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
 312                 .sleep_ctrl_mask = AS3722_LDO11_EXT_ENABLE_MASK,
 313                 .n_voltages = AS3722_LDO_NUM_VOLT,
 314         },
 315 };
 316
 317
 318 static const int as3722_ldo_current[] = { 150000, 300000 };
 319 static const int as3722_sd016_current[] = { 2500000, 3000000, 3500000 };
 320
 321 static int as3722_current_to_index(int min_uA, int max_uA,
 322                 const int *curr_table, int n_currents)
 323 {
 324         int i;
 325
 326         for (i = n_currents - 1; i >= 0; i--) {
 327                 if ((min_uA <= curr_table[i]) && (curr_table[i] <= max_uA))
 328                         return i;
 329         }
 330         return -EINVAL;
 331 }
 332
 333 static int as3722_ldo_get_current_limit(struct regulator_dev *rdev)
 334 {
 335         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 336         struct as3722 *as3722 = as3722_regs->as3722;
 337         int id = rdev_get_id(rdev);
 338         u32 val;
 339         int ret;
 340
 341         ret = as3722_read(as3722, as3722_reg_lookup[id].vsel_reg, &val);
 342         if (ret < 0) {
 343                 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
 344                         as3722_reg_lookup[id].vsel_reg, ret);
 345                 return ret;
 346         }
 347         if (val & AS3722_LDO_ILIMIT_MASK)
 348                 return 300000;
 349         return 150000;
 350 }
 351
 352 static int as3722_ldo_set_current_limit(struct regulator_dev *rdev,
 353                 int min_uA, int max_uA)
 354 {
 355         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 356         struct as3722 *as3722 = as3722_regs->as3722;
 357         int id = rdev_get_id(rdev);
 358         int ret;
 359         u32 reg = 0;
 360
 361         ret = as3722_current_to_index(min_uA, max_uA, as3722_ldo_current,
 362                                 ARRAY_SIZE(as3722_ldo_current));
 363         if (ret < 0) {
 364                 dev_err(as3722_regs->dev,
 365                         "Current range min:max = %d:%d does not support\n",
 366                         min_uA, max_uA);
 367                 return ret;
 368         }
 369         if (ret)
 370                 reg = AS3722_LDO_ILIMIT_BIT;
 371         return as3722_update_bits(as3722, as3722_reg_lookup[id].vsel_reg,
 372                         AS3722_LDO_ILIMIT_MASK, reg);
 373 }
 374
 375 static struct regulator_ops as3722_ldo0_ops = {
 376         .is_enabled = regulator_is_enabled_regmap,
 377         .enable = regulator_enable_regmap,
 378         .disable = regulator_disable_regmap,
 379         .list_voltage = regulator_list_voltage_linear,
 380         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 381         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 382         .get_current_limit = as3722_ldo_get_current_limit,
 383         .set_current_limit = as3722_ldo_set_current_limit,
 384 };
 385
 386 static struct regulator_ops as3722_ldo0_extcntrl_ops = {
 387         .list_voltage = regulator_list_voltage_linear,
 388         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 389         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 390         .get_current_limit = as3722_ldo_get_current_limit,
 391         .set_current_limit = as3722_ldo_set_current_limit,
 392 };
 393
 394 static int as3722_ldo3_set_tracking_mode(struct as3722_regulators *as3722_reg,
 395                 int id, u8 mode)
 396 {
 397         struct as3722 *as3722 = as3722_reg->as3722;
 398
 399         switch (mode) {
 400         case AS3722_LDO3_MODE_PMOS:
 401         case AS3722_LDO3_MODE_PMOS_TRACKING:
 402         case AS3722_LDO3_MODE_NMOS:
 403         case AS3722_LDO3_MODE_SWITCH:
 404                 return as3722_update_bits(as3722,
 405                         as3722_reg_lookup[id].vsel_reg,
 406                         AS3722_LDO3_MODE_MASK, mode);
 407
 408         default:
 409                 return -EINVAL;
 410         }
 411 }
 412
 413 static int as3722_ldo3_get_current_limit(struct regulator_dev *rdev)
 414 {
 415         return 150000;
 416 }
 417
 418 static struct regulator_ops as3722_ldo3_ops = {
 419         .is_enabled = regulator_is_enabled_regmap,
 420         .enable = regulator_enable_regmap,
 421         .disable = regulator_disable_regmap,
 422         .list_voltage = regulator_list_voltage_linear,
 423         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 424         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 425         .get_current_limit = as3722_ldo3_get_current_limit,
 426 };
 427
 428 static struct regulator_ops as3722_ldo3_extcntrl_ops = {
 429         .list_voltage = regulator_list_voltage_linear,
 430         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 431         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 432         .get_current_limit = as3722_ldo3_get_current_limit,
 433 };
 434
 435 static const struct regulator_linear_range as3722_ldo_ranges[] = {
 436         REGULATOR_LINEAR_RANGE(825000, 0x01, 0x24, 25000),
 437         REGULATOR_LINEAR_RANGE(1725000, 0x40, 0x7F, 25000),
 438 };
 439
 440 static struct regulator_ops as3722_ldo_ops = {
 441         .is_enabled = regulator_is_enabled_regmap,
 442         .enable = regulator_enable_regmap,
 443         .disable = regulator_disable_regmap,
 444         .map_voltage = regulator_map_voltage_linear_range,
 445         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 446         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 447         .list_voltage = regulator_list_voltage_linear_range,
 448         .get_current_limit = as3722_ldo_get_current_limit,
 449         .set_current_limit = as3722_ldo_set_current_limit,
 450 };
 451
 452 static struct regulator_ops as3722_ldo_extcntrl_ops = {
 453         .map_voltage = regulator_map_voltage_linear_range,
 454         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 455         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 456         .list_voltage = regulator_list_voltage_linear_range,
 457         .get_current_limit = as3722_ldo_get_current_limit,
 458         .set_current_limit = as3722_ldo_set_current_limit,
 459 };
 460
 461 static unsigned int as3722_sd_get_mode(struct regulator_dev *rdev)
 462 {
 463         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 464         struct as3722 *as3722 = as3722_regs->as3722;
 465         int id = rdev_get_id(rdev);
 466         u32 val;
 467         int ret;
 468
 469         if (!as3722_reg_lookup[id].control_reg)
 470                 return -ENOTSUPP;
 471
 472         ret = as3722_read(as3722, as3722_reg_lookup[id].control_reg, &val);
 473         if (ret < 0) {
 474                 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
 475                         as3722_reg_lookup[id].control_reg, ret);
 476                 return ret;
 477         }
 478
 479         if (val & as3722_reg_lookup[id].mode_mask)
 480                 return REGULATOR_MODE_FAST;
 481         else
 482                 return REGULATOR_MODE_NORMAL;
 483 }
 484
 485 static int as3722_sd_set_mode(struct regulator_dev *rdev,
 486                 unsigned int mode)
 487 {
 488         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 489         struct as3722 *as3722 = as3722_regs->as3722;
 490         u8 id = rdev_get_id(rdev);
 491         u8 val = 0;
 492         int ret;
 493
 494         if (!as3722_reg_lookup[id].control_reg)
 495                 return -ERANGE;
 496
 497         switch (mode) {
 498         case REGULATOR_MODE_FAST:
 499                 val = as3722_reg_lookup[id].mode_mask;
 500         case REGULATOR_MODE_NORMAL: /* fall down */
 501                 break;
 502         default:
 503                 return -EINVAL;
 504         }
 505
 506         ret = as3722_update_bits(as3722, as3722_reg_lookup[id].control_reg,
 507                         as3722_reg_lookup[id].mode_mask, val);
 508         if (ret < 0) {
 509                 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
 510                         as3722_reg_lookup[id].control_reg, ret);
 511                 return ret;
 512         }
 513         return ret;
 514 }
 515
 516 static int as3722_sd016_get_current_limit(struct regulator_dev *rdev)
 517 {
 518         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 519         struct as3722 *as3722 = as3722_regs->as3722;
 520         int id = rdev_get_id(rdev);
 521         u32 val, reg;
 522         int mask;
 523         int ret;
 524
 525         switch (id) {
 526         case AS3722_REGULATOR_ID_SD0:
 527                 reg = AS3722_OVCURRENT_REG;
 528                 mask = AS3722_OVCURRENT_SD0_TRIP_MASK;
 529                 break;
 530         case AS3722_REGULATOR_ID_SD1:
 531                 reg = AS3722_OVCURRENT_REG;
 532                 mask = AS3722_OVCURRENT_SD1_TRIP_MASK;
 533                 break;
 534         case AS3722_REGULATOR_ID_SD6:
 535                 reg = AS3722_OVCURRENT_DEB_REG;
 536                 mask = AS3722_OVCURRENT_SD6_TRIP_MASK;
 537                 break;
 538         default:
 539                 return -EINVAL;
 540         }
 541         ret = as3722_read(as3722, reg, &val);
 542         if (ret < 0) {
 543                 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
 544                         reg, ret);
 545                 return ret;
 546         }
 547         val &= mask;
 548         val >>= ffs(mask) - 1;
 549         if (val == 3)
 550                 return -EINVAL;
 551         return as3722_sd016_current[val];
 552 }
 553
 554 static int as3722_sd016_set_current_limit(struct regulator_dev *rdev,
 555                 int min_uA, int max_uA)
 556 {
 557         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 558         struct as3722 *as3722 = as3722_regs->as3722;
 559         int id = rdev_get_id(rdev);
 560         int ret;
 561         int val;
 562         int mask;
 563         u32 reg;
 564
 565         ret = as3722_current_to_index(min_uA, max_uA, as3722_sd016_current,
 566                                 ARRAY_SIZE(as3722_sd016_current));
 567         if (ret < 0) {
 568                 dev_err(as3722_regs->dev,
 569                         "Current range min:max = %d:%d does not support\n",
 570                         min_uA, max_uA);
 571                 return ret;
 572         }
 573
 574         switch (id) {
 575         case AS3722_REGULATOR_ID_SD0:
 576                 reg = AS3722_OVCURRENT_REG;
 577                 mask = AS3722_OVCURRENT_SD0_TRIP_MASK;
 578                 break;
 579         case AS3722_REGULATOR_ID_SD1:
 580                 reg = AS3722_OVCURRENT_REG;
 581                 mask = AS3722_OVCURRENT_SD1_TRIP_MASK;
 582                 break;
 583         case AS3722_REGULATOR_ID_SD6:
 584                 reg = AS3722_OVCURRENT_DEB_REG;
 585                 mask = AS3722_OVCURRENT_SD6_TRIP_MASK;
 586                 break;
 587         default:
 588                 return -EINVAL;
 589         }
 590         ret <<= ffs(mask) - 1;
 591         val = ret & mask;
 592         return as3722_update_bits(as3722, reg, mask, val);
 593 }
 594
 595 static bool as3722_sd0_is_low_voltage(struct as3722_regulators *as3722_regs)
 596 {
 597         int err;
 598         unsigned val;
 599
 600         err = as3722_read(as3722_regs->as3722, AS3722_FUSE7_REG, &val);
 601         if (err < 0) {
 602                 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
 603                         AS3722_FUSE7_REG, err);
 604                 return false;
 605         }
 606         if (val & AS3722_FUSE7_SD0_LOW_VOLTAGE)
 607                 return true;
 608         return false;
 609 }
 610
 611 static const struct regulator_linear_range as3722_sd2345_ranges[] = {
 612         REGULATOR_LINEAR_RANGE(612500, 0x01, 0x40, 12500),
 613         REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000),
 614         REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7F, 50000),
 615 };
 616
 617 static struct regulator_ops as3722_sd016_ops = {
 618         .is_enabled = regulator_is_enabled_regmap,
 619         .enable = regulator_enable_regmap,
 620         .disable = regulator_disable_regmap,
 621         .list_voltage = regulator_list_voltage_linear,
 622         .map_voltage = regulator_map_voltage_linear,
 623         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 624         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 625         .get_current_limit = as3722_sd016_get_current_limit,
 626         .set_current_limit = as3722_sd016_set_current_limit,
 627         .get_mode = as3722_sd_get_mode,
 628         .set_mode = as3722_sd_set_mode,
 629 };
 630
 631 static struct regulator_ops as3722_sd016_extcntrl_ops = {
 632         .list_voltage = regulator_list_voltage_linear,
 633         .map_voltage = regulator_map_voltage_linear,
 634         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 635         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 636         .get_current_limit = as3722_sd016_get_current_limit,
 637         .set_current_limit = as3722_sd016_set_current_limit,
 638         .get_mode = as3722_sd_get_mode,
 639         .set_mode = as3722_sd_set_mode,
 640 };
 641
 642 static struct regulator_ops as3722_sd2345_ops = {
 643         .is_enabled = regulator_is_enabled_regmap,
 644         .enable = regulator_enable_regmap,
 645         .disable = regulator_disable_regmap,
 646         .list_voltage = regulator_list_voltage_linear_range,
 647         .map_voltage = regulator_map_voltage_linear_range,
 648         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 649         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 650         .get_mode = as3722_sd_get_mode,
 651         .set_mode = as3722_sd_set_mode,
 652 };
 653
 654 static struct regulator_ops as3722_sd2345_extcntrl_ops = {
 655         .list_voltage = regulator_list_voltage_linear_range,
 656         .map_voltage = regulator_map_voltage_linear_range,
 657         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 658         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 659         .get_mode = as3722_sd_get_mode,
 660         .set_mode = as3722_sd_set_mode,
 661 };
 662
 663 static int as3722_extreg_init(struct as3722_regulators *as3722_regs, int id,
 664                 int ext_pwr_ctrl)
 665 {
 666         int ret;
 667         unsigned int val;
 668
 669         if ((ext_pwr_ctrl < AS3722_EXT_CONTROL_ENABLE1) ||
 670                 (ext_pwr_ctrl > AS3722_EXT_CONTROL_ENABLE3))
 671                 return -EINVAL;
 672
 673         val =  ext_pwr_ctrl << (ffs(as3722_reg_lookup[id].sleep_ctrl_mask) - 1);
 674         ret = as3722_update_bits(as3722_regs->as3722,
 675                         as3722_reg_lookup[id].sleep_ctrl_reg,
 676                         as3722_reg_lookup[id].sleep_ctrl_mask, val);
 677         if (ret < 0)
 678                 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
 679                         as3722_reg_lookup[id].sleep_ctrl_reg, ret);
 680         return ret;
 681 }
 682
 683 static struct of_regulator_match as3722_regulator_matches[] = {
 684         { .name = "sd0", },
 685         { .name = "sd1", },
 686         { .name = "sd2", },
 687         { .name = "sd3", },
 688         { .name = "sd4", },
 689         { .name = "sd5", },
 690         { .name = "sd6", },
 691         { .name = "ldo0", },
 692         { .name = "ldo1", },
 693         { .name = "ldo2", },
 694         { .name = "ldo3", },
 695         { .name = "ldo4", },
 696         { .name = "ldo5", },
 697         { .name = "ldo6", },
 698         { .name = "ldo7", },
 699         { .name = "ldo9", },
 700         { .name = "ldo10", },
 701         { .name = "ldo11", },
 702 };
 703
 704 static int as3722_get_regulator_dt_data(struct platform_device *pdev,
 705                 struct as3722_regulators *as3722_regs)
 706 {
 707         struct device_node *np;
 708         struct as3722_regulator_config_data *reg_config;
 709         u32 prop;
 710         int id;
 711         int ret;
 712
 713         np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
 714         if (!np) {
 715                 dev_err(&pdev->dev, "Device is not having regulators node\n");
 716                 return -ENODEV;
 717         }
 718         pdev->dev.of_node = np;
 719
 720         ret = of_regulator_match(&pdev->dev, np, as3722_regulator_matches,
 721                         ARRAY_SIZE(as3722_regulator_matches));
 722         if (ret < 0) {
 723                 dev_err(&pdev->dev, "Parsing of regulator node failed: %d\n",
 724                         ret);
 725                 return ret;
 726         }
 727
 728         for (id = 0; id < ARRAY_SIZE(as3722_regulator_matches); ++id) {
 729                 struct device_node *reg_node;
 730
 731                 reg_config = &as3722_regs->reg_config_data[id];
 732                 reg_config->reg_init = as3722_regulator_matches[id].init_data;
 733                 reg_node = as3722_regulator_matches[id].of_node;
 734
 735                 if (!reg_config->reg_init || !reg_node)
 736                         continue;
 737
 738                 ret = of_property_read_u32(reg_node, "ams,ext-control", &prop);
 739                 if (!ret) {
 740                         if (prop < 3)
 741                                 reg_config->ext_control = prop;
 742                         else
 743                                 dev_warn(&pdev->dev,
 744                                         "ext-control have invalid option: %u\n",
 745                                         prop);
 746                 }
 747                 reg_config->enable_tracking =
 748                         of_property_read_bool(reg_node, "ams,enable-tracking");
 749         }
 750         return 0;
 751 }
 752
 753 static int as3722_regulator_probe(struct platform_device *pdev)
 754 {
 755         struct as3722 *as3722 = dev_get_drvdata(pdev->dev.parent);
 756         struct as3722_regulators *as3722_regs;
 757         struct as3722_regulator_config_data *reg_config;
 758         struct regulator_dev *rdev;
 759         struct regulator_config config = { };
 760         struct regulator_ops *ops;
 761         int id;
 762         int ret;
 763
 764         as3722_regs = devm_kzalloc(&pdev->dev, sizeof(*as3722_regs),
 765                                 GFP_KERNEL);
 766         if (!as3722_regs)
 767                 return -ENOMEM;
 768
 769         as3722_regs->dev = &pdev->dev;
 770         as3722_regs->as3722 = as3722;
 771         platform_set_drvdata(pdev, as3722_regs);
 772
 773         ret = as3722_get_regulator_dt_data(pdev, as3722_regs);
 774         if (ret < 0)
 775                 return ret;
 776
 777         config.dev = &pdev->dev;
 778         config.driver_data = as3722_regs;
 779         config.regmap = as3722->regmap;
 780
 781         for (id = 0; id < AS3722_REGULATOR_ID_MAX; id++) {
 782                 reg_config = &as3722_regs->reg_config_data[id];
 783
 784                 as3722_regs->desc[id].name = as3722_reg_lookup[id].name;
 785                 as3722_regs->desc[id].supply_name = as3722_reg_lookup[id].sname;
 786                 as3722_regs->desc[id].id = as3722_reg_lookup[id].regulator_id;
 787                 as3722_regs->desc[id].n_voltages =
 788                                         as3722_reg_lookup[id].n_voltages;
 789                 as3722_regs->desc[id].type = REGULATOR_VOLTAGE;
 790                 as3722_regs->desc[id].owner = THIS_MODULE;
 791                 as3722_regs->desc[id].enable_reg =
 792                                         as3722_reg_lookup[id].enable_reg;
 793                 as3722_regs->desc[id].enable_mask =
 794                                         as3722_reg_lookup[id].enable_mask;
 795                 as3722_regs->desc[id].vsel_reg = as3722_reg_lookup[id].vsel_reg;
 796                 as3722_regs->desc[id].vsel_mask =
 797                                         as3722_reg_lookup[id].vsel_mask;
 798                 switch (id) {
 799                 case AS3722_REGULATOR_ID_LDO0:
 800                         if (reg_config->ext_control)
 801                                 ops = &as3722_ldo0_extcntrl_ops;
 802                         else
 803                                 ops = &as3722_ldo0_ops;
 804                         as3722_regs->desc[id].min_uV = 825000;
 805                         as3722_regs->desc[id].uV_step = 25000;
 806                         as3722_regs->desc[id].linear_min_sel = 1;
 807                         as3722_regs->desc[id].enable_time = 500;
 808                         break;
 809                 case AS3722_REGULATOR_ID_LDO3:
 810                         if (reg_config->ext_control)
 811                                 ops = &as3722_ldo3_extcntrl_ops;
 812                         else
 813                                 ops = &as3722_ldo3_ops;
 814                         as3722_regs->desc[id].min_uV = 620000;
 815                         as3722_regs->desc[id].uV_step = 20000;
 816                         as3722_regs->desc[id].linear_min_sel = 1;
 817                         as3722_regs->desc[id].enable_time = 500;
 818                         if (reg_config->enable_tracking) {
 819                                 ret = as3722_ldo3_set_tracking_mode(as3722_regs,
 820                                         id, AS3722_LDO3_MODE_PMOS_TRACKING);
 821                                 if (ret < 0) {
 822                                         dev_err(&pdev->dev,
 823                                                 "LDO3 tracking failed: %d\n",
 824                                                 ret);
 825                                         return ret;
 826                                 }
 827                         }
 828                         break;
 829                 case AS3722_REGULATOR_ID_SD0:
 830                 case AS3722_REGULATOR_ID_SD1:
 831                 case AS3722_REGULATOR_ID_SD6:
 832                         if (reg_config->ext_control)
 833                                 ops = &as3722_sd016_extcntrl_ops;
 834                         else
 835                                 ops = &as3722_sd016_ops;
 836                         if (id == AS3722_REGULATOR_ID_SD0 &&
 837                             as3722_sd0_is_low_voltage(as3722_regs)) {
 838                                 as3722_regs->desc[id].n_voltages =
 839                                         AS3722_SD0_VSEL_LOW_VOL_MAX + 1;
 840                                 as3722_regs->desc[id].min_uV = 410000;
 841                         } else {
 842                                 as3722_regs->desc[id].n_voltages =
 843                                         AS3722_SD0_VSEL_MAX + 1,
 844                                 as3722_regs->desc[id].min_uV = 610000;
 845                         }
 846                         as3722_regs->desc[id].uV_step = 10000;
 847                         as3722_regs->desc[id].linear_min_sel = 1;
 848                         as3722_regs->desc[id].enable_time = 600;
 849                         break;
 850                 case AS3722_REGULATOR_ID_SD2:
 851                 case AS3722_REGULATOR_ID_SD3:
 852                 case AS3722_REGULATOR_ID_SD4:
 853                 case AS3722_REGULATOR_ID_SD5:
 854                         if (reg_config->ext_control)
 855                                 ops = &as3722_sd2345_extcntrl_ops;
 856                         else
 857                                 ops = &as3722_sd2345_ops;
 858                         as3722_regs->desc[id].linear_ranges =
 859                                                 as3722_sd2345_ranges;
 860                         as3722_regs->desc[id].n_linear_ranges =
 861                                         ARRAY_SIZE(as3722_sd2345_ranges);
 862                         break;
 863                 default:
 864                         if (reg_config->ext_control)
 865                                 ops = &as3722_ldo_extcntrl_ops;
 866                         else
 867                                 ops = &as3722_ldo_ops;
 868                         as3722_regs->desc[id].enable_time = 500;
 869                         as3722_regs->desc[id].linear_ranges = as3722_ldo_ranges;
 870                         as3722_regs->desc[id].n_linear_ranges =
 871                                                 ARRAY_SIZE(as3722_ldo_ranges);
 872                         break;
 873                 }
 874                 as3722_regs->desc[id].ops = ops;
 875                 config.init_data = reg_config->reg_init;
 876                 config.of_node = as3722_regulator_matches[id].of_node;
 877                 rdev = devm_regulator_register(&pdev->dev,
 878                                         &as3722_regs->desc[id], &config);
 879                 if (IS_ERR(rdev)) {
 880                         ret = PTR_ERR(rdev);
 881                         dev_err(&pdev->dev, "regulator %d register failed %d\n",
 882                                 id, ret);
 883                         return ret;
 884                 }
 885
 886                 as3722_regs->rdevs[id] = rdev;
 887                 if (reg_config->ext_control) {
 888                         ret = regulator_enable_regmap(rdev);
 889                         if (ret < 0) {
 890                                 dev_err(&pdev->dev,
 891                                         "Regulator %d enable failed: %d\n",
 892                                         id, ret);
 893                                 return ret;
 894                         }
 895                         ret = as3722_extreg_init(as3722_regs, id,
 896                                         reg_config->ext_control);
 897                         if (ret < 0) {
 898                                 dev_err(&pdev->dev,
 899                                         "AS3722 ext control failed: %d", ret);
 900                                 return ret;
 901                         }
 902                 }
 903         }
 904         return 0;
 905 }
 906
 907 static const struct of_device_id of_as3722_regulator_match[] = {
 908         { .compatible = "ams,as3722-regulator", },
 909         {},
 910 };
 911 MODULE_DEVICE_TABLE(of, of_as3722_regulator_match);
 912
 913 static struct platform_driver as3722_regulator_driver = {
 914         .driver = {
 915                 .name = "as3722-regulator",
 916                 .owner = THIS_MODULE,
 917                 .of_match_table = of_as3722_regulator_match,
 918         },
 919         .probe = as3722_regulator_probe,
 920 };
 921
 922 module_platform_driver(as3722_regulator_driver);
 923
 924 MODULE_ALIAS("platform:as3722-regulator");
 925 MODULE_DESCRIPTION("AS3722 regulator driver");
 926 MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>");
 927 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
 928 MODULE_LICENSE("GPL");