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_desc desc[AS3722_REGULATOR_ID_MAX];
  85         struct as3722_regulator_config_data
  86                         reg_config_data[AS3722_REGULATOR_ID_MAX];
  87 };
  88
  89 static const struct as3722_register_mapping as3722_reg_lookup[] = {
  90         {
  91                 .regulator_id = AS3722_REGULATOR_ID_SD0,
  92                 .name = "as3722-sd0",
  93                 .vsel_reg = AS3722_SD0_VOLTAGE_REG,
  94                 .vsel_mask = AS3722_SD_VSEL_MASK,
  95                 .enable_reg = AS3722_SD_CONTROL_REG,
  96                 .enable_mask = AS3722_SDn_CTRL(0),
  97                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
  98                 .sleep_ctrl_mask = AS3722_SD0_EXT_ENABLE_MASK,
  99                 .control_reg = AS3722_SD0_CONTROL_REG,
 100                 .mode_mask = AS3722_SD0_MODE_FAST,
 101         },
 102         {
 103                 .regulator_id = AS3722_REGULATOR_ID_SD1,
 104                 .name = "as3722-sd1",
 105                 .vsel_reg = AS3722_SD1_VOLTAGE_REG,
 106                 .vsel_mask = AS3722_SD_VSEL_MASK,
 107                 .enable_reg = AS3722_SD_CONTROL_REG,
 108                 .enable_mask = AS3722_SDn_CTRL(1),
 109                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
 110                 .sleep_ctrl_mask = AS3722_SD1_EXT_ENABLE_MASK,
 111                 .control_reg = AS3722_SD1_CONTROL_REG,
 112                 .mode_mask = AS3722_SD1_MODE_FAST,
 113         },
 114         {
 115                 .regulator_id = AS3722_REGULATOR_ID_SD2,
 116                 .name = "as3722-sd2",
 117                 .sname = "vsup-sd2",
 118                 .vsel_reg = AS3722_SD2_VOLTAGE_REG,
 119                 .vsel_mask = AS3722_SD_VSEL_MASK,
 120                 .enable_reg = AS3722_SD_CONTROL_REG,
 121                 .enable_mask = AS3722_SDn_CTRL(2),
 122                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
 123                 .sleep_ctrl_mask = AS3722_SD2_EXT_ENABLE_MASK,
 124                 .control_reg = AS3722_SD23_CONTROL_REG,
 125                 .mode_mask = AS3722_SD2_MODE_FAST,
 126                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
 127         },
 128         {
 129                 .regulator_id = AS3722_REGULATOR_ID_SD3,
 130                 .name = "as3722-sd3",
 131                 .sname = "vsup-sd3",
 132                 .vsel_reg = AS3722_SD3_VOLTAGE_REG,
 133                 .vsel_mask = AS3722_SD_VSEL_MASK,
 134                 .enable_reg = AS3722_SD_CONTROL_REG,
 135                 .enable_mask = AS3722_SDn_CTRL(3),
 136                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
 137                 .sleep_ctrl_mask = AS3722_SD3_EXT_ENABLE_MASK,
 138                 .control_reg = AS3722_SD23_CONTROL_REG,
 139                 .mode_mask = AS3722_SD3_MODE_FAST,
 140                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
 141         },
 142         {
 143                 .regulator_id = AS3722_REGULATOR_ID_SD4,
 144                 .name = "as3722-sd4",
 145                 .sname = "vsup-sd4",
 146                 .vsel_reg = AS3722_SD4_VOLTAGE_REG,
 147                 .vsel_mask = AS3722_SD_VSEL_MASK,
 148                 .enable_reg = AS3722_SD_CONTROL_REG,
 149                 .enable_mask = AS3722_SDn_CTRL(4),
 150                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
 151                 .sleep_ctrl_mask = AS3722_SD4_EXT_ENABLE_MASK,
 152                 .control_reg = AS3722_SD4_CONTROL_REG,
 153                 .mode_mask = AS3722_SD4_MODE_FAST,
 154                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
 155         },
 156         {
 157                 .regulator_id = AS3722_REGULATOR_ID_SD5,
 158                 .name = "as3722-sd5",
 159                 .sname = "vsup-sd5",
 160                 .vsel_reg = AS3722_SD5_VOLTAGE_REG,
 161                 .vsel_mask = AS3722_SD_VSEL_MASK,
 162                 .enable_reg = AS3722_SD_CONTROL_REG,
 163                 .enable_mask = AS3722_SDn_CTRL(5),
 164                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
 165                 .sleep_ctrl_mask = AS3722_SD5_EXT_ENABLE_MASK,
 166                 .control_reg = AS3722_SD5_CONTROL_REG,
 167                 .mode_mask = AS3722_SD5_MODE_FAST,
 168                 .n_voltages = AS3722_SD2_VSEL_MAX + 1,
 169         },
 170         {
 171                 .regulator_id = AS3722_REGULATOR_ID_SD6,
 172                 .name = "as3722-sd6",
 173                 .vsel_reg = AS3722_SD6_VOLTAGE_REG,
 174                 .vsel_mask = AS3722_SD_VSEL_MASK,
 175                 .enable_reg = AS3722_SD_CONTROL_REG,
 176                 .enable_mask = AS3722_SDn_CTRL(6),
 177                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
 178                 .sleep_ctrl_mask = AS3722_SD6_EXT_ENABLE_MASK,
 179                 .control_reg = AS3722_SD6_CONTROL_REG,
 180                 .mode_mask = AS3722_SD6_MODE_FAST,
 181         },
 182         {
 183                 .regulator_id = AS3722_REGULATOR_ID_LDO0,
 184                 .name = "as3722-ldo0",
 185                 .sname = "vin-ldo0",
 186                 .vsel_reg = AS3722_LDO0_VOLTAGE_REG,
 187                 .vsel_mask = AS3722_LDO0_VSEL_MASK,
 188                 .enable_reg = AS3722_LDOCONTROL0_REG,
 189                 .enable_mask = AS3722_LDO0_CTRL,
 190                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
 191                 .sleep_ctrl_mask = AS3722_LDO0_EXT_ENABLE_MASK,
 192                 .n_voltages = AS3722_LDO0_NUM_VOLT,
 193         },
 194         {
 195                 .regulator_id = AS3722_REGULATOR_ID_LDO1,
 196                 .name = "as3722-ldo1",
 197                 .sname = "vin-ldo1-6",
 198                 .vsel_reg = AS3722_LDO1_VOLTAGE_REG,
 199                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 200                 .enable_reg = AS3722_LDOCONTROL0_REG,
 201                 .enable_mask = AS3722_LDO1_CTRL,
 202                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
 203                 .sleep_ctrl_mask = AS3722_LDO1_EXT_ENABLE_MASK,
 204                 .n_voltages = AS3722_LDO_NUM_VOLT,
 205         },
 206         {
 207                 .regulator_id = AS3722_REGULATOR_ID_LDO2,
 208                 .name = "as3722-ldo2",
 209                 .sname = "vin-ldo2-5-7",
 210                 .vsel_reg = AS3722_LDO2_VOLTAGE_REG,
 211                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 212                 .enable_reg = AS3722_LDOCONTROL0_REG,
 213                 .enable_mask = AS3722_LDO2_CTRL,
 214                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
 215                 .sleep_ctrl_mask = AS3722_LDO2_EXT_ENABLE_MASK,
 216                 .n_voltages = AS3722_LDO_NUM_VOLT,
 217         },
 218         {
 219                 .regulator_id = AS3722_REGULATOR_ID_LDO3,
 220                 .name = "as3722-ldo3",
 221                 .sname = "vin-ldo3-4",
 222                 .vsel_reg = AS3722_LDO3_VOLTAGE_REG,
 223                 .vsel_mask = AS3722_LDO3_VSEL_MASK,
 224                 .enable_reg = AS3722_LDOCONTROL0_REG,
 225                 .enable_mask = AS3722_LDO3_CTRL,
 226                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
 227                 .sleep_ctrl_mask = AS3722_LDO3_EXT_ENABLE_MASK,
 228                 .n_voltages = AS3722_LDO3_NUM_VOLT,
 229         },
 230         {
 231                 .regulator_id = AS3722_REGULATOR_ID_LDO4,
 232                 .name = "as3722-ldo4",
 233                 .sname = "vin-ldo3-4",
 234                 .vsel_reg = AS3722_LDO4_VOLTAGE_REG,
 235                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 236                 .enable_reg = AS3722_LDOCONTROL0_REG,
 237                 .enable_mask = AS3722_LDO4_CTRL,
 238                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
 239                 .sleep_ctrl_mask = AS3722_LDO4_EXT_ENABLE_MASK,
 240                 .n_voltages = AS3722_LDO_NUM_VOLT,
 241         },
 242         {
 243                 .regulator_id = AS3722_REGULATOR_ID_LDO5,
 244                 .name = "as3722-ldo5",
 245                 .sname = "vin-ldo2-5-7",
 246                 .vsel_reg = AS3722_LDO5_VOLTAGE_REG,
 247                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 248                 .enable_reg = AS3722_LDOCONTROL0_REG,
 249                 .enable_mask = AS3722_LDO5_CTRL,
 250                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
 251                 .sleep_ctrl_mask = AS3722_LDO5_EXT_ENABLE_MASK,
 252                 .n_voltages = AS3722_LDO_NUM_VOLT,
 253         },
 254         {
 255                 .regulator_id = AS3722_REGULATOR_ID_LDO6,
 256                 .name = "as3722-ldo6",
 257                 .sname = "vin-ldo1-6",
 258                 .vsel_reg = AS3722_LDO6_VOLTAGE_REG,
 259                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 260                 .enable_reg = AS3722_LDOCONTROL0_REG,
 261                 .enable_mask = AS3722_LDO6_CTRL,
 262                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
 263                 .sleep_ctrl_mask = AS3722_LDO6_EXT_ENABLE_MASK,
 264                 .n_voltages = AS3722_LDO_NUM_VOLT,
 265         },
 266         {
 267                 .regulator_id = AS3722_REGULATOR_ID_LDO7,
 268                 .name = "as3722-ldo7",
 269                 .sname = "vin-ldo2-5-7",
 270                 .vsel_reg = AS3722_LDO7_VOLTAGE_REG,
 271                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 272                 .enable_reg = AS3722_LDOCONTROL0_REG,
 273                 .enable_mask = AS3722_LDO7_CTRL,
 274                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
 275                 .sleep_ctrl_mask = AS3722_LDO7_EXT_ENABLE_MASK,
 276                 .n_voltages = AS3722_LDO_NUM_VOLT,
 277         },
 278         {
 279                 .regulator_id = AS3722_REGULATOR_ID_LDO9,
 280                 .name = "as3722-ldo9",
 281                 .sname = "vin-ldo9-10",
 282                 .vsel_reg = AS3722_LDO9_VOLTAGE_REG,
 283                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 284                 .enable_reg = AS3722_LDOCONTROL1_REG,
 285                 .enable_mask = AS3722_LDO9_CTRL,
 286                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
 287                 .sleep_ctrl_mask = AS3722_LDO9_EXT_ENABLE_MASK,
 288                 .n_voltages = AS3722_LDO_NUM_VOLT,
 289         },
 290         {
 291                 .regulator_id = AS3722_REGULATOR_ID_LDO10,
 292                 .name = "as3722-ldo10",
 293                 .sname = "vin-ldo9-10",
 294                 .vsel_reg = AS3722_LDO10_VOLTAGE_REG,
 295                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 296                 .enable_reg = AS3722_LDOCONTROL1_REG,
 297                 .enable_mask = AS3722_LDO10_CTRL,
 298                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
 299                 .sleep_ctrl_mask = AS3722_LDO10_EXT_ENABLE_MASK,
 300                 .n_voltages = AS3722_LDO_NUM_VOLT,
 301         },
 302         {
 303                 .regulator_id = AS3722_REGULATOR_ID_LDO11,
 304                 .name = "as3722-ldo11",
 305                 .sname = "vin-ldo11",
 306                 .vsel_reg = AS3722_LDO11_VOLTAGE_REG,
 307                 .vsel_mask = AS3722_LDO_VSEL_MASK,
 308                 .enable_reg = AS3722_LDOCONTROL1_REG,
 309                 .enable_mask = AS3722_LDO11_CTRL,
 310                 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
 311                 .sleep_ctrl_mask = AS3722_LDO11_EXT_ENABLE_MASK,
 312                 .n_voltages = AS3722_LDO_NUM_VOLT,
 313         },
 314 };
 315
 316 static const unsigned int as3722_ldo_current[] = { 150000, 300000 };
 317 static const unsigned int as3722_sd016_current[] = {
 318         2500000, 3000000, 3500000
 319 };
 320
 321 static const struct regulator_ops as3722_ldo0_ops = {
 322         .is_enabled = regulator_is_enabled_regmap,
 323         .enable = regulator_enable_regmap,
 324         .disable = regulator_disable_regmap,
 325         .list_voltage = regulator_list_voltage_linear,
 326         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 327         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 328         .get_current_limit = regulator_get_current_limit_regmap,
 329         .set_current_limit = regulator_set_current_limit_regmap,
 330 };
 331
 332 static const struct regulator_ops as3722_ldo0_extcntrl_ops = {
 333         .list_voltage = regulator_list_voltage_linear,
 334         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 335         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 336         .get_current_limit = regulator_get_current_limit_regmap,
 337         .set_current_limit = regulator_set_current_limit_regmap,
 338 };
 339
 340 static int as3722_ldo3_set_tracking_mode(struct as3722_regulators *as3722_reg,
 341                 int id, u8 mode)
 342 {
 343         struct as3722 *as3722 = as3722_reg->as3722;
 344
 345         switch (mode) {
 346         case AS3722_LDO3_MODE_PMOS:
 347         case AS3722_LDO3_MODE_PMOS_TRACKING:
 348         case AS3722_LDO3_MODE_NMOS:
 349         case AS3722_LDO3_MODE_SWITCH:
 350                 return as3722_update_bits(as3722,
 351                         as3722_reg_lookup[id].vsel_reg,
 352                         AS3722_LDO3_MODE_MASK, mode);
 353
 354         default:
 355                 return -EINVAL;
 356         }
 357 }
 358
 359 static int as3722_ldo3_get_current_limit(struct regulator_dev *rdev)
 360 {
 361         return 150000;
 362 }
 363
 364 static const struct regulator_ops as3722_ldo3_ops = {
 365         .is_enabled = regulator_is_enabled_regmap,
 366         .enable = regulator_enable_regmap,
 367         .disable = regulator_disable_regmap,
 368         .list_voltage = regulator_list_voltage_linear,
 369         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 370         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 371         .get_current_limit = as3722_ldo3_get_current_limit,
 372 };
 373
 374 static const struct regulator_ops as3722_ldo3_extcntrl_ops = {
 375         .list_voltage = regulator_list_voltage_linear,
 376         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 377         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 378         .get_current_limit = as3722_ldo3_get_current_limit,
 379 };
 380
 381 static const struct regulator_ops as3722_ldo6_ops = {
 382         .is_enabled = regulator_is_enabled_regmap,
 383         .enable = regulator_enable_regmap,
 384         .disable = regulator_disable_regmap,
 385         .map_voltage = regulator_map_voltage_linear_range,
 386         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 387         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 388         .list_voltage = regulator_list_voltage_linear_range,
 389         .get_current_limit = regulator_get_current_limit_regmap,
 390         .set_current_limit = regulator_set_current_limit_regmap,
 391         .get_bypass = regulator_get_bypass_regmap,
 392         .set_bypass = regulator_set_bypass_regmap,
 393 };
 394
 395 static const struct regulator_ops as3722_ldo6_extcntrl_ops = {
 396         .map_voltage = regulator_map_voltage_linear_range,
 397         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 398         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 399         .list_voltage = regulator_list_voltage_linear_range,
 400         .get_current_limit = regulator_get_current_limit_regmap,
 401         .set_current_limit = regulator_set_current_limit_regmap,
 402         .get_bypass = regulator_get_bypass_regmap,
 403         .set_bypass = regulator_set_bypass_regmap,
 404 };
 405
 406 static const struct regulator_linear_range as3722_ldo_ranges[] = {
 407         REGULATOR_LINEAR_RANGE(0, 0x00, 0x00, 0),
 408         REGULATOR_LINEAR_RANGE(825000, 0x01, 0x24, 25000),
 409         REGULATOR_LINEAR_RANGE(1725000, 0x40, 0x7F, 25000),
 410 };
 411
 412 static const struct regulator_ops as3722_ldo_ops = {
 413         .is_enabled = regulator_is_enabled_regmap,
 414         .enable = regulator_enable_regmap,
 415         .disable = regulator_disable_regmap,
 416         .map_voltage = regulator_map_voltage_linear_range,
 417         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 418         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 419         .list_voltage = regulator_list_voltage_linear_range,
 420         .get_current_limit = regulator_get_current_limit_regmap,
 421         .set_current_limit = regulator_set_current_limit_regmap,
 422 };
 423
 424 static const struct regulator_ops as3722_ldo_extcntrl_ops = {
 425         .map_voltage = regulator_map_voltage_linear_range,
 426         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 427         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 428         .list_voltage = regulator_list_voltage_linear_range,
 429         .get_current_limit = regulator_get_current_limit_regmap,
 430         .set_current_limit = regulator_set_current_limit_regmap,
 431 };
 432
 433 static unsigned int as3722_sd_get_mode(struct regulator_dev *rdev)
 434 {
 435         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 436         struct as3722 *as3722 = as3722_regs->as3722;
 437         int id = rdev_get_id(rdev);
 438         u32 val;
 439         int ret;
 440
 441         if (!as3722_reg_lookup[id].control_reg)
 442                 return -ENOTSUPP;
 443
 444         ret = as3722_read(as3722, as3722_reg_lookup[id].control_reg, &val);
 445         if (ret < 0) {
 446                 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
 447                         as3722_reg_lookup[id].control_reg, ret);
 448                 return ret;
 449         }
 450
 451         if (val & as3722_reg_lookup[id].mode_mask)
 452                 return REGULATOR_MODE_FAST;
 453         else
 454                 return REGULATOR_MODE_NORMAL;
 455 }
 456
 457 static int as3722_sd_set_mode(struct regulator_dev *rdev,
 458                 unsigned int mode)
 459 {
 460         struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
 461         struct as3722 *as3722 = as3722_regs->as3722;
 462         u8 id = rdev_get_id(rdev);
 463         u8 val = 0;
 464         int ret;
 465
 466         if (!as3722_reg_lookup[id].control_reg)
 467                 return -ERANGE;
 468
 469         switch (mode) {
 470         case REGULATOR_MODE_FAST:
 471                 val = as3722_reg_lookup[id].mode_mask;
 472         case REGULATOR_MODE_NORMAL: /* fall down */
 473                 break;
 474         default:
 475                 return -EINVAL;
 476         }
 477
 478         ret = as3722_update_bits(as3722, as3722_reg_lookup[id].control_reg,
 479                         as3722_reg_lookup[id].mode_mask, val);
 480         if (ret < 0) {
 481                 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
 482                         as3722_reg_lookup[id].control_reg, ret);
 483                 return ret;
 484         }
 485         return ret;
 486 }
 487
 488 static bool as3722_sd0_is_low_voltage(struct as3722_regulators *as3722_regs)
 489 {
 490         int err;
 491         unsigned val;
 492
 493         err = as3722_read(as3722_regs->as3722, AS3722_FUSE7_REG, &val);
 494         if (err < 0) {
 495                 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
 496                         AS3722_FUSE7_REG, err);
 497                 return false;
 498         }
 499         if (val & AS3722_FUSE7_SD0_LOW_VOLTAGE)
 500                 return true;
 501         return false;
 502 }
 503
 504 static const struct regulator_linear_range as3722_sd2345_ranges[] = {
 505         REGULATOR_LINEAR_RANGE(0, 0x00, 0x00, 0),
 506         REGULATOR_LINEAR_RANGE(612500, 0x01, 0x40, 12500),
 507         REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000),
 508         REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7F, 50000),
 509 };
 510
 511 static const struct regulator_ops as3722_sd016_ops = {
 512         .is_enabled = regulator_is_enabled_regmap,
 513         .enable = regulator_enable_regmap,
 514         .disable = regulator_disable_regmap,
 515         .list_voltage = regulator_list_voltage_linear,
 516         .map_voltage = regulator_map_voltage_linear,
 517         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 518         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 519         .get_current_limit = regulator_get_current_limit_regmap,
 520         .set_current_limit = regulator_set_current_limit_regmap,
 521         .get_mode = as3722_sd_get_mode,
 522         .set_mode = as3722_sd_set_mode,
 523 };
 524
 525 static const struct regulator_ops as3722_sd016_extcntrl_ops = {
 526         .list_voltage = regulator_list_voltage_linear,
 527         .map_voltage = regulator_map_voltage_linear,
 528         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 529         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 530         .get_current_limit = regulator_get_current_limit_regmap,
 531         .set_current_limit = regulator_set_current_limit_regmap,
 532         .get_mode = as3722_sd_get_mode,
 533         .set_mode = as3722_sd_set_mode,
 534 };
 535
 536 static const struct regulator_ops as3722_sd2345_ops = {
 537         .is_enabled = regulator_is_enabled_regmap,
 538         .enable = regulator_enable_regmap,
 539         .disable = regulator_disable_regmap,
 540         .list_voltage = regulator_list_voltage_linear_range,
 541         .map_voltage = regulator_map_voltage_linear_range,
 542         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 543         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 544         .get_mode = as3722_sd_get_mode,
 545         .set_mode = as3722_sd_set_mode,
 546 };
 547
 548 static const struct regulator_ops as3722_sd2345_extcntrl_ops = {
 549         .list_voltage = regulator_list_voltage_linear_range,
 550         .map_voltage = regulator_map_voltage_linear_range,
 551         .set_voltage_sel = regulator_set_voltage_sel_regmap,
 552         .get_voltage_sel = regulator_get_voltage_sel_regmap,
 553         .get_mode = as3722_sd_get_mode,
 554         .set_mode = as3722_sd_set_mode,
 555 };
 556
 557 static int as3722_extreg_init(struct as3722_regulators *as3722_regs, int id,
 558                 int ext_pwr_ctrl)
 559 {
 560         int ret;
 561         unsigned int val;
 562
 563         if ((ext_pwr_ctrl < AS3722_EXT_CONTROL_ENABLE1) ||
 564                 (ext_pwr_ctrl > AS3722_EXT_CONTROL_ENABLE3))
 565                 return -EINVAL;
 566
 567         val =  ext_pwr_ctrl << (ffs(as3722_reg_lookup[id].sleep_ctrl_mask) - 1);
 568         ret = as3722_update_bits(as3722_regs->as3722,
 569                         as3722_reg_lookup[id].sleep_ctrl_reg,
 570                         as3722_reg_lookup[id].sleep_ctrl_mask, val);
 571         if (ret < 0)
 572                 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
 573                         as3722_reg_lookup[id].sleep_ctrl_reg, ret);
 574         return ret;
 575 }
 576
 577 static struct of_regulator_match as3722_regulator_matches[] = {
 578         { .name = "sd0", },
 579         { .name = "sd1", },
 580         { .name = "sd2", },
 581         { .name = "sd3", },
 582         { .name = "sd4", },
 583         { .name = "sd5", },
 584         { .name = "sd6", },
 585         { .name = "ldo0", },
 586         { .name = "ldo1", },
 587         { .name = "ldo2", },
 588         { .name = "ldo3", },
 589         { .name = "ldo4", },
 590         { .name = "ldo5", },
 591         { .name = "ldo6", },
 592         { .name = "ldo7", },
 593         { .name = "ldo9", },
 594         { .name = "ldo10", },
 595         { .name = "ldo11", },
 596 };
 597
 598 static int as3722_get_regulator_dt_data(struct platform_device *pdev,
 599                 struct as3722_regulators *as3722_regs)
 600 {
 601         struct device_node *np;
 602         struct as3722_regulator_config_data *reg_config;
 603         u32 prop;
 604         int id;
 605         int ret;
 606
 607         np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
 608         if (!np) {
 609                 dev_err(&pdev->dev, "Device is not having regulators node\n");
 610                 return -ENODEV;
 611         }
 612         pdev->dev.of_node = np;
 613
 614         ret = of_regulator_match(&pdev->dev, np, as3722_regulator_matches,
 615                         ARRAY_SIZE(as3722_regulator_matches));
 616         of_node_put(np);
 617         if (ret < 0) {
 618                 dev_err(&pdev->dev, "Parsing of regulator node failed: %d\n",
 619                         ret);
 620                 return ret;
 621         }
 622
 623         for (id = 0; id < ARRAY_SIZE(as3722_regulator_matches); ++id) {
 624                 struct device_node *reg_node;
 625
 626                 reg_config = &as3722_regs->reg_config_data[id];
 627                 reg_config->reg_init = as3722_regulator_matches[id].init_data;
 628                 reg_node = as3722_regulator_matches[id].of_node;
 629
 630                 if (!reg_config->reg_init || !reg_node)
 631                         continue;
 632
 633                 ret = of_property_read_u32(reg_node, "ams,ext-control", &prop);
 634                 if (!ret) {
 635                         if (prop < 3)
 636                                 reg_config->ext_control = prop;
 637                         else
 638                                 dev_warn(&pdev->dev,
 639                                         "ext-control have invalid option: %u\n",
 640                                         prop);
 641                 }
 642                 reg_config->enable_tracking =
 643                         of_property_read_bool(reg_node, "ams,enable-tracking");
 644         }
 645         return 0;
 646 }
 647
 648 static int as3722_regulator_probe(struct platform_device *pdev)
 649 {
 650         struct as3722 *as3722 = dev_get_drvdata(pdev->dev.parent);
 651         struct as3722_regulators *as3722_regs;
 652         struct as3722_regulator_config_data *reg_config;
 653         struct regulator_dev *rdev;
 654         struct regulator_config config = { };
 655         const struct regulator_ops *ops;
 656         int id;
 657         int ret;
 658
 659         as3722_regs = devm_kzalloc(&pdev->dev, sizeof(*as3722_regs),
 660                                 GFP_KERNEL);
 661         if (!as3722_regs)
 662                 return -ENOMEM;
 663
 664         as3722_regs->dev = &pdev->dev;
 665         as3722_regs->as3722 = as3722;
 666         platform_set_drvdata(pdev, as3722_regs);
 667
 668         ret = as3722_get_regulator_dt_data(pdev, as3722_regs);
 669         if (ret < 0)
 670                 return ret;
 671
 672         config.dev = &pdev->dev;
 673         config.driver_data = as3722_regs;
 674         config.regmap = as3722->regmap;
 675
 676         for (id = 0; id < AS3722_REGULATOR_ID_MAX; id++) {
 677                 struct regulator_desc *desc;
 678
 679                 desc = &as3722_regs->desc[id];
 680                 reg_config = &as3722_regs->reg_config_data[id];
 681
 682                 desc->name = as3722_reg_lookup[id].name;
 683                 desc->supply_name = as3722_reg_lookup[id].sname;
 684                 desc->id = as3722_reg_lookup[id].regulator_id;
 685                 desc->n_voltages = as3722_reg_lookup[id].n_voltages;
 686                 desc->type = REGULATOR_VOLTAGE;
 687                 desc->owner = THIS_MODULE;
 688                 desc->enable_reg = as3722_reg_lookup[id].enable_reg;
 689                 desc->enable_mask = as3722_reg_lookup[id].enable_mask;
 690                 desc->vsel_reg = as3722_reg_lookup[id].vsel_reg;
 691                 desc->vsel_mask = as3722_reg_lookup[id].vsel_mask;
 692                 switch (id) {
 693                 case AS3722_REGULATOR_ID_LDO0:
 694                         if (reg_config->ext_control)
 695                                 ops = &as3722_ldo0_extcntrl_ops;
 696                         else
 697                                 ops = &as3722_ldo0_ops;
 698                         desc->min_uV = 825000;
 699                         desc->uV_step = 25000;
 700                         desc->linear_min_sel = 1;
 701                         desc->enable_time = 500;
 702                         desc->curr_table = as3722_ldo_current;
 703                         desc->n_current_limits = ARRAY_SIZE(as3722_ldo_current);
 704                         desc->csel_reg = as3722_reg_lookup[id].vsel_reg;
 705                         desc->csel_mask = AS3722_LDO_ILIMIT_MASK;
 706                         break;
 707                 case AS3722_REGULATOR_ID_LDO3:
 708                         if (reg_config->ext_control)
 709                                 ops = &as3722_ldo3_extcntrl_ops;
 710                         else
 711                                 ops = &as3722_ldo3_ops;
 712                         desc->min_uV = 620000;
 713                         desc->uV_step = 20000;
 714                         desc->linear_min_sel = 1;
 715                         desc->enable_time = 500;
 716                         if (reg_config->enable_tracking) {
 717                                 ret = as3722_ldo3_set_tracking_mode(as3722_regs,
 718                                         id, AS3722_LDO3_MODE_PMOS_TRACKING);
 719                                 if (ret < 0) {
 720                                         dev_err(&pdev->dev,
 721                                                 "LDO3 tracking failed: %d\n",
 722                                                 ret);
 723                                         return ret;
 724                                 }
 725                         }
 726                         break;
 727                 case AS3722_REGULATOR_ID_LDO6:
 728                         if (reg_config->ext_control)
 729                                 ops = &as3722_ldo6_extcntrl_ops;
 730                         else
 731                                 ops = &as3722_ldo6_ops;
 732                         desc->enable_time = 500;
 733                         desc->bypass_reg = AS3722_LDO6_VOLTAGE_REG;
 734                         desc->bypass_mask = AS3722_LDO_VSEL_MASK;
 735                         desc->bypass_val_on = AS3722_LDO6_VSEL_BYPASS;
 736                         desc->bypass_val_off = AS3722_LDO6_VSEL_BYPASS;
 737                         desc->linear_ranges = as3722_ldo_ranges;
 738                         desc->n_linear_ranges = ARRAY_SIZE(as3722_ldo_ranges);
 739                         desc->curr_table = as3722_ldo_current;
 740                         desc->n_current_limits = ARRAY_SIZE(as3722_ldo_current);
 741                         desc->csel_reg = as3722_reg_lookup[id].vsel_reg;
 742                         desc->csel_mask = AS3722_LDO_ILIMIT_MASK;
 743                         break;
 744                 case AS3722_REGULATOR_ID_SD0:
 745                 case AS3722_REGULATOR_ID_SD1:
 746                 case AS3722_REGULATOR_ID_SD6:
 747                         if (reg_config->ext_control)
 748                                 ops = &as3722_sd016_extcntrl_ops;
 749                         else
 750                                 ops = &as3722_sd016_ops;
 751                         if (id == AS3722_REGULATOR_ID_SD0 &&
 752                             as3722_sd0_is_low_voltage(as3722_regs)) {
 753                                 as3722_regs->desc[id].n_voltages =
 754                                         AS3722_SD0_VSEL_LOW_VOL_MAX + 1;
 755                                 as3722_regs->desc[id].min_uV = 410000;
 756                         } else {
 757                                 as3722_regs->desc[id].n_voltages =
 758                                         AS3722_SD0_VSEL_MAX + 1;
 759                                 as3722_regs->desc[id].min_uV = 610000;
 760                         }
 761                         desc->uV_step = 10000;
 762                         desc->linear_min_sel = 1;
 763                         desc->enable_time = 600;
 764                         desc->curr_table = as3722_sd016_current;
 765                         desc->n_current_limits =
 766                                 ARRAY_SIZE(as3722_sd016_current);
 767                         if (id == AS3722_REGULATOR_ID_SD0) {
 768                                 desc->csel_reg = AS3722_OVCURRENT_REG;
 769                                 desc->csel_mask =
 770                                         AS3722_OVCURRENT_SD0_TRIP_MASK;
 771                         } else if (id == AS3722_REGULATOR_ID_SD1) {
 772                                 desc->csel_reg = AS3722_OVCURRENT_REG;
 773                                 desc->csel_mask =
 774                                         AS3722_OVCURRENT_SD1_TRIP_MASK;
 775                         } else if (id == AS3722_REGULATOR_ID_SD6) {
 776                                 desc->csel_reg = AS3722_OVCURRENT_DEB_REG;
 777                                 desc->csel_mask =
 778                                         AS3722_OVCURRENT_SD6_TRIP_MASK;
 779                         }
 780                         break;
 781                 case AS3722_REGULATOR_ID_SD2:
 782                 case AS3722_REGULATOR_ID_SD3:
 783                 case AS3722_REGULATOR_ID_SD4:
 784                 case AS3722_REGULATOR_ID_SD5:
 785                         if (reg_config->ext_control)
 786                                 ops = &as3722_sd2345_extcntrl_ops;
 787                         else
 788                                 ops = &as3722_sd2345_ops;
 789                         desc->linear_ranges = as3722_sd2345_ranges;
 790                         desc->n_linear_ranges =
 791                                         ARRAY_SIZE(as3722_sd2345_ranges);
 792                         break;
 793                 default:
 794                         if (reg_config->ext_control)
 795                                 ops = &as3722_ldo_extcntrl_ops;
 796                         else
 797                                 ops = &as3722_ldo_ops;
 798                         desc->enable_time = 500;
 799                         desc->linear_ranges = as3722_ldo_ranges;
 800                         desc->n_linear_ranges = ARRAY_SIZE(as3722_ldo_ranges);
 801                         desc->curr_table = as3722_ldo_current;
 802                         desc->n_current_limits = ARRAY_SIZE(as3722_ldo_current);
 803                         desc->csel_reg = as3722_reg_lookup[id].vsel_reg;
 804                         desc->csel_mask = AS3722_LDO_ILIMIT_MASK;
 805                         break;
 806                 }
 807                 desc->ops = ops;
 808                 config.init_data = reg_config->reg_init;
 809                 config.of_node = as3722_regulator_matches[id].of_node;
 810                 rdev = devm_regulator_register(&pdev->dev, desc, &config);
 811                 if (IS_ERR(rdev)) {
 812                         ret = PTR_ERR(rdev);
 813                         dev_err(&pdev->dev, "regulator %d register failed %d\n",
 814                                 id, ret);
 815                         return ret;
 816                 }
 817
 818                 if (reg_config->ext_control) {
 819                         ret = regulator_enable_regmap(rdev);
 820                         if (ret < 0) {
 821                                 dev_err(&pdev->dev,
 822                                         "Regulator %d enable failed: %d\n",
 823                                         id, ret);
 824                                 return ret;
 825                         }
 826                         ret = as3722_extreg_init(as3722_regs, id,
 827                                         reg_config->ext_control);
 828                         if (ret < 0) {
 829                                 dev_err(&pdev->dev,
 830                                         "AS3722 ext control failed: %d", ret);
 831                                 return ret;
 832                         }
 833                 }
 834         }
 835         return 0;
 836 }
 837
 838 static const struct of_device_id of_as3722_regulator_match[] = {
 839         { .compatible = "ams,as3722-regulator", },
 840         {},
 841 };
 842 MODULE_DEVICE_TABLE(of, of_as3722_regulator_match);
 843
 844 static struct platform_driver as3722_regulator_driver = {
 845         .driver = {
 846                 .name = "as3722-regulator",
 847                 .of_match_table = of_as3722_regulator_match,
 848         },
 849         .probe = as3722_regulator_probe,
 850 };
 851
 852 module_platform_driver(as3722_regulator_driver);
 853
 854 MODULE_ALIAS("platform:as3722-regulator");
 855 MODULE_DESCRIPTION("AS3722 regulator driver");
 856 MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>");
 857 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
 858 MODULE_LICENSE("GPL");