sys/arm64/rockchip/rk805.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2018 Emmanuel Vadot <manu@FreeBSD.org>
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25  * SUCH DAMAGE.
  26  */
  27
  28 #include <sys/cdefs.h>
  29 __FBSDID("$FreeBSD$");
  30
  31 #include <sys/param.h>
  32 #include <sys/bus.h>
  33 #include <sys/kernel.h>
  34 #include <sys/module.h>
  35 #include <sys/mutex.h>
  36 #include <sys/rman.h>
  37 #include <machine/bus.h>
  38
  39 #include <dev/iicbus/iiconf.h>
  40 #include <dev/iicbus/iicbus.h>
  41
  42 #include <dev/ofw/ofw_bus.h>
  43 #include <dev/ofw/ofw_bus_subr.h>
  44
  45 #include <dev/extres/regulator/regulator.h>
  46
  47 #include <arm64/rockchip/rk805reg.h>
  48
  49 #include "regdev_if.h"
  50
  51 MALLOC_DEFINE(M_RK805_REG, "RK805 regulator", "RK805 power regulator");
  52
  53 /* #define      dprintf(sc, format, arg...)     device_printf(sc->base_dev, "%s: " format, __func__, arg) */
  54 #define dprintf(sc, format, arg...)
  55
  56 enum rk_pmic_type {
  57         RK805 = 1,
  58         RK808,
  59 };
  60
  61 static struct ofw_compat_data compat_data[] = {
  62         {"rockchip,rk805", RK805},
  63         {"rockchip,rk808", RK808},
  64         {NULL,             0}
  65 };
  66
  67 struct rk805_regdef {
  68         intptr_t                id;
  69         char                    *name;
  70         uint8_t                 enable_reg;
  71         uint8_t                 enable_mask;
  72         uint8_t                 voltage_reg;
  73         uint8_t                 voltage_mask;
  74         int                     voltage_min;
  75         int                     voltage_max;
  76         int                     voltage_step;
  77         int                     voltage_nstep;
  78 };
  79
  80 struct rk805_reg_sc {
  81         struct regnode          *regnode;
  82         device_t                base_dev;
  83         struct rk805_regdef     *def;
  84         phandle_t               xref;
  85         struct regnode_std_param *param;
  86 };
  87
  88 struct reg_list {
  89         TAILQ_ENTRY(reg_list)   next;
  90         struct rk805_reg_sc     *reg;
  91 };
  92
  93 struct rk805_softc {
  94         device_t                dev;
  95         struct mtx              mtx;
  96         struct resource *       res[1];
  97         void *                  intrcookie;
  98         struct intr_config_hook intr_hook;
  99         enum rk_pmic_type       type;
 100
 101         TAILQ_HEAD(, reg_list)          regs;
 102         int                     nregs;
 103 };
 104
 105 static int rk805_regnode_status(struct regnode *regnode, int *status);
 106 static int rk805_regnode_set_voltage(struct regnode *regnode, int min_uvolt,
 107     int max_uvolt, int *udelay);
 108 static int rk805_regnode_get_voltage(struct regnode *regnode, int *uvolt);
 109
 110 static struct rk805_regdef rk805_regdefs[] = {
 111         {
 112                 .id = RK805_DCDC1,
 113                 .name = "DCDC_REG1",
 114                 .enable_reg = RK805_DCDC_EN,
 115                 .enable_mask = 0x11,
 116                 .voltage_reg = RK805_DCDC1_ON_VSEL,
 117                 .voltage_mask = 0x3F,
 118                 .voltage_min = 712500,
 119                 .voltage_max = 1450000,
 120                 .voltage_step = 12500,
 121                 .voltage_nstep = 64,
 122         },
 123         {
 124                 .id = RK805_DCDC2,
 125                 .name = "DCDC_REG2",
 126                 .enable_reg = RK805_DCDC_EN,
 127                 .enable_mask = 0x22,
 128                 .voltage_reg = RK805_DCDC2_ON_VSEL,
 129                 .voltage_mask = 0x3F,
 130                 .voltage_min = 712500,
 131                 .voltage_max = 1450000,
 132                 .voltage_step = 12500,
 133                 .voltage_nstep = 64,
 134         },
 135         {
 136                 .id = RK805_DCDC3,
 137                 .name = "DCDC_REG3",
 138                 .enable_reg = RK805_DCDC_EN,
 139                 .enable_mask = 0x44,
 140         },
 141         {
 142                 .id = RK805_DCDC4,
 143                 .name = "DCDC_REG4",
 144                 .enable_reg = RK805_DCDC_EN,
 145                 .enable_mask = 0x88,
 146                 .voltage_reg = RK805_DCDC4_ON_VSEL,
 147                 .voltage_mask = 0x3F,
 148                 .voltage_min = 800000,
 149                 .voltage_max = 3500000,
 150                 .voltage_step = 100000,
 151                 .voltage_nstep = 28,
 152         },
 153         {
 154                 .id = RK805_LDO1,
 155                 .name = "LDO_REG1",
 156                 .enable_reg = RK805_LDO_EN,
 157                 .enable_mask = 0x11,
 158                 .voltage_reg = RK805_LDO1_ON_VSEL,
 159                 .voltage_mask = 0x1F,
 160                 .voltage_min = 800000,
 161                 .voltage_max = 3400000,
 162                 .voltage_step = 100000,
 163                 .voltage_nstep = 27,
 164         },
 165         {
 166                 .id = RK805_LDO2,
 167                 .name = "LDO_REG2",
 168                 .enable_reg = RK805_LDO_EN,
 169                 .enable_mask = 0x22,
 170                 .voltage_reg = RK805_LDO2_ON_VSEL,
 171                 .voltage_mask = 0x1F,
 172                 .voltage_min = 800000,
 173                 .voltage_max = 3400000,
 174                 .voltage_step = 100000,
 175                 .voltage_nstep = 27,
 176         },
 177         {
 178                 .id = RK805_LDO3,
 179                 .name = "LDO_REG3",
 180                 .enable_reg = RK805_LDO_EN,
 181                 .enable_mask = 0x44,
 182                 .voltage_reg = RK805_LDO3_ON_VSEL,
 183                 .voltage_mask = 0x1F,
 184                 .voltage_min = 800000,
 185                 .voltage_max = 3400000,
 186                 .voltage_step = 100000,
 187                 .voltage_nstep = 27,
 188         },
 189 };
 190
 191 static struct rk805_regdef rk808_regdefs[] = {
 192         {
 193                 .id = RK805_DCDC1,
 194                 .name = "DCDC_REG1",
 195                 .enable_reg = RK805_DCDC_EN,
 196                 .enable_mask = 0x1,
 197                 .voltage_reg = RK805_DCDC1_ON_VSEL,
 198                 .voltage_mask = 0x3F,
 199                 .voltage_min = 712500,
 200                 .voltage_max = 1500000,
 201                 .voltage_step = 12500,
 202                 .voltage_nstep = 64,
 203         },
 204         {
 205                 .id = RK805_DCDC2,
 206                 .name = "DCDC_REG2",
 207                 .enable_reg = RK805_DCDC_EN,
 208                 .enable_mask = 0x2,
 209                 .voltage_reg = RK805_DCDC2_ON_VSEL,
 210                 .voltage_mask = 0x3F,
 211                 .voltage_min = 712500,
 212                 .voltage_max = 1500000,
 213                 .voltage_step = 12500,
 214                 .voltage_nstep = 64,
 215         },
 216         {
 217                 /* BUCK3 voltage is calculated based on external resistor */
 218                 .id = RK805_DCDC3,
 219                 .name = "DCDC_REG3",
 220                 .enable_reg = RK805_DCDC_EN,
 221                 .enable_mask = 0x4,
 222         },
 223         {
 224                 .id = RK805_DCDC4,
 225                 .name = "DCDC_REG4",
 226                 .enable_reg = RK805_DCDC_EN,
 227                 .enable_mask = 0x8,
 228                 .voltage_reg = RK805_DCDC4_ON_VSEL,
 229                 .voltage_mask = 0xF,
 230                 .voltage_min = 1800000,
 231                 .voltage_max = 3300000,
 232                 .voltage_step = 100000,
 233                 .voltage_nstep = 16,
 234         },
 235         {
 236                 .id = RK808_LDO1,
 237                 .name = "LDO_REG1",
 238                 .enable_reg = RK808_LDO_EN,
 239                 .enable_mask = 0x1,
 240                 .voltage_reg = RK805_LDO1_ON_VSEL,
 241                 .voltage_mask = 0x1F,
 242                 .voltage_min = 1800000,
 243                 .voltage_max = 3400000,
 244                 .voltage_step = 100000,
 245                 .voltage_nstep = 17,
 246         },
 247         {
 248                 .id = RK808_LDO2,
 249                 .name = "LDO_REG2",
 250                 .enable_reg = RK808_LDO_EN,
 251                 .enable_mask = 0x2,
 252                 .voltage_reg = RK805_LDO2_ON_VSEL,
 253                 .voltage_mask = 0x1F,
 254                 .voltage_min = 1800000,
 255                 .voltage_max = 3400000,
 256                 .voltage_step = 100000,
 257                 .voltage_nstep = 17,
 258         },
 259         {
 260                 .id = RK808_LDO3,
 261                 .name = "LDO_REG3",
 262                 .enable_reg = RK808_LDO_EN,
 263                 .enable_mask = 0x4,
 264                 .voltage_reg = RK805_LDO3_ON_VSEL,
 265                 .voltage_mask = 0xF,
 266                 .voltage_min = 800000,
 267                 .voltage_max = 2500000,
 268                 .voltage_step = 100000,
 269                 .voltage_nstep = 18,
 270         },
 271         {
 272                 .id = RK808_LDO4,
 273                 .name = "LDO_REG4",
 274                 .enable_reg = RK808_LDO_EN,
 275                 .enable_mask = 0x8,
 276                 .voltage_reg = RK808_LDO4_ON_VSEL,
 277                 .voltage_mask = 0x1F,
 278                 .voltage_min = 1800000,
 279                 .voltage_max = 3400000,
 280                 .voltage_step = 100000,
 281                 .voltage_nstep = 17,
 282         },
 283         {
 284                 .id = RK808_LDO5,
 285                 .name = "LDO_REG5",
 286                 .enable_reg = RK808_LDO_EN,
 287                 .enable_mask = 0x10,
 288                 .voltage_reg = RK808_LDO5_ON_VSEL,
 289                 .voltage_mask = 0x1F,
 290                 .voltage_min = 1800000,
 291                 .voltage_max = 3400000,
 292                 .voltage_step = 100000,
 293                 .voltage_nstep = 17,
 294         },
 295         {
 296                 .id = RK808_LDO6,
 297                 .name = "LDO_REG6",
 298                 .enable_reg = RK808_LDO_EN,
 299                 .enable_mask = 0x20,
 300                 .voltage_reg = RK808_LDO6_ON_VSEL,
 301                 .voltage_mask = 0x1F,
 302                 .voltage_min = 800000,
 303                 .voltage_max = 2500000,
 304                 .voltage_step = 100000,
 305                 .voltage_nstep = 18,
 306         },
 307         {
 308                 .id = RK808_LDO7,
 309                 .name = "LDO_REG7",
 310                 .enable_reg = RK808_LDO_EN,
 311                 .enable_mask = 0x40,
 312                 .voltage_reg = RK808_LDO7_ON_VSEL,
 313                 .voltage_mask = 0x1F,
 314                 .voltage_min = 800000,
 315                 .voltage_max = 2500000,
 316                 .voltage_step = 100000,
 317                 .voltage_nstep = 18,
 318         },
 319         {
 320                 .id = RK808_LDO8,
 321                 .name = "LDO_REG8",
 322                 .enable_reg = RK808_LDO_EN,
 323                 .enable_mask = 0x80,
 324                 .voltage_reg = RK808_LDO8_ON_VSEL,
 325                 .voltage_mask = 0x1F,
 326                 .voltage_min = 1800000,
 327                 .voltage_max = 3400000,
 328                 .voltage_step = 100000,
 329                 .voltage_nstep = 17,
 330         },
 331         {
 332                 .id = RK808_SWITCH1,
 333                 .name = "SWITCH_REG1",
 334                 .enable_reg = RK805_DCDC_EN,
 335                 .enable_mask = 0x20,
 336                 .voltage_min = 3000000,
 337                 .voltage_max = 3000000,
 338         },
 339         {
 340                 .id = RK808_SWITCH2,
 341                 .name = "SWITCH_REG2",
 342                 .enable_reg = RK805_DCDC_EN,
 343                 .enable_mask = 0x40,
 344                 .voltage_min = 3000000,
 345                 .voltage_max = 3000000,
 346         },
 347 };
 348
 349 static int
 350 rk805_read(device_t dev, uint8_t reg, uint8_t *data, uint8_t size)
 351 {
 352         int err;
 353
 354         err = iicdev_readfrom(dev, reg, data, size, IIC_INTRWAIT);
 355         return (err);
 356 }
 357
 358 static int
 359 rk805_write(device_t dev, uint8_t reg, uint8_t data)
 360 {
 361
 362         return (iicdev_writeto(dev, reg, &data, 1, IIC_INTRWAIT));
 363 }
 364
 365 static int
 366 rk805_regnode_init(struct regnode *regnode)
 367 {
 368         struct rk805_reg_sc *sc;
 369         struct regnode_std_param *param;
 370         int rv, udelay, uvolt, status;
 371
 372         sc = regnode_get_softc(regnode);
 373         dprintf(sc, "Regulator %s init called\n", sc->def->name);
 374         param = regnode_get_stdparam(regnode);
 375         if (param->min_uvolt == 0)
 376                 return (0);
 377
 378         /* Check that the regulator is preset to the correct voltage */
 379         rv  = rk805_regnode_get_voltage(regnode, &uvolt);
 380         if (rv != 0)
 381                 return(rv);
 382
 383         if (uvolt >= param->min_uvolt && uvolt <= param->max_uvolt)
 384                 return(0);
 385         /*
 386          * Set the regulator at the correct voltage if it is not enabled.
 387          * Do not enable it, this is will be done either by a
 388          * consumer or by regnode_set_constraint if boot_on is true
 389          */
 390         rv = rk805_regnode_status(regnode, &status);
 391         if (rv != 0 || status == REGULATOR_STATUS_ENABLED)
 392                 return (rv);
 393
 394         rv = rk805_regnode_set_voltage(regnode, param->min_uvolt,
 395             param->max_uvolt, &udelay);
 396         if (udelay != 0)
 397                 DELAY(udelay);
 398
 399         return (rv);
 400 }
 401
 402 static int
 403 rk805_regnode_enable(struct regnode *regnode, bool enable, int *udelay)
 404 {
 405         struct rk805_reg_sc *sc;
 406         uint8_t val;
 407
 408         sc = regnode_get_softc(regnode);
 409
 410         dprintf(sc, "%sabling regulator %s\n",
 411             enable ? "En" : "Dis",
 412             sc->def->name);
 413         rk805_read(sc->base_dev, sc->def->enable_reg, &val, 1);
 414         if (enable)
 415                 val |= sc->def->enable_mask;
 416         else
 417                 val &= ~sc->def->enable_mask;
 418         rk805_write(sc->base_dev, sc->def->enable_reg, val);
 419
 420         *udelay = 0;
 421
 422         return (0);
 423 }
 424
 425 static void
 426 rk805_regnode_reg_to_voltage(struct rk805_reg_sc *sc, uint8_t val, int *uv)
 427 {
 428         if (val < sc->def->voltage_nstep)
 429                 *uv = sc->def->voltage_min + val * sc->def->voltage_step;
 430         else
 431                 *uv = sc->def->voltage_min +
 432                        (sc->def->voltage_nstep * sc->def->voltage_step);
 433 }
 434
 435 static int
 436 rk805_regnode_voltage_to_reg(struct rk805_reg_sc *sc, int min_uvolt,
 437     int max_uvolt, uint8_t *val)
 438 {
 439         uint8_t nval;
 440         int nstep, uvolt;
 441
 442         nval = 0;
 443         uvolt = sc->def->voltage_min;
 444
 445         for (nstep = 0; nstep < sc->def->voltage_nstep && uvolt < min_uvolt;
 446              nstep++) {
 447                 ++nval;
 448                 uvolt += sc->def->voltage_step;
 449         }
 450         if (uvolt > max_uvolt)
 451                 return (EINVAL);
 452
 453         *val = nval;
 454         return (0);
 455 }
 456
 457 static int
 458 rk805_regnode_status(struct regnode *regnode, int *status)
 459 {
 460         struct rk805_reg_sc *sc;
 461         uint8_t val;
 462
 463         sc = regnode_get_softc(regnode);
 464
 465         *status = 0;
 466         rk805_read(sc->base_dev, sc->def->enable_reg, &val, 1);
 467         if (val & sc->def->enable_mask)
 468                 *status = REGULATOR_STATUS_ENABLED;
 469
 470         return (0);
 471 }
 472
 473 static int
 474 rk805_regnode_set_voltage(struct regnode *regnode, int min_uvolt,
 475     int max_uvolt, int *udelay)
 476 {
 477         struct rk805_reg_sc *sc;
 478         uint8_t val;
 479         int uvolt;
 480
 481         sc = regnode_get_softc(regnode);
 482
 483         if (!sc->def->voltage_step)
 484                 return (ENXIO);
 485
 486         dprintf(sc, "Setting %s to %d<->%d uvolts\n",
 487             sc->def->name,
 488             min_uvolt,
 489             max_uvolt);
 490         rk805_read(sc->base_dev, sc->def->voltage_reg, &val, 1);
 491         if (rk805_regnode_voltage_to_reg(sc, min_uvolt, max_uvolt, &val) != 0)
 492                 return (ERANGE);
 493
 494         rk805_write(sc->base_dev, sc->def->voltage_reg, val);
 495
 496         rk805_read(sc->base_dev, sc->def->voltage_reg, &val, 1);
 497
 498         *udelay = 0;
 499
 500         rk805_regnode_reg_to_voltage(sc, val, &uvolt);
 501         dprintf(sc, "Regulator %s set to %d uvolt\n",
 502           sc->def->name,
 503           uvolt);
 504
 505         return (0);
 506 }
 507
 508 static int
 509 rk805_regnode_get_voltage(struct regnode *regnode, int *uvolt)
 510 {
 511         struct rk805_reg_sc *sc;
 512         uint8_t val;
 513
 514         sc = regnode_get_softc(regnode);
 515
 516         if (sc->def->voltage_min ==  sc->def->voltage_max) {
 517                 *uvolt = sc->def->voltage_min;
 518                 return (0);
 519         }
 520
 521         if (!sc->def->voltage_step)
 522                 return (ENXIO);
 523
 524         rk805_read(sc->base_dev, sc->def->voltage_reg, &val, 1);
 525         rk805_regnode_reg_to_voltage(sc, val & sc->def->voltage_mask, uvolt);
 526
 527         dprintf(sc, "Regulator %s is at %d uvolt\n",
 528           sc->def->name,
 529           *uvolt);
 530
 531         return (0);
 532 }
 533
 534 static regnode_method_t rk805_regnode_methods[] = {
 535         /* Regulator interface */
 536         REGNODEMETHOD(regnode_init,             rk805_regnode_init),
 537         REGNODEMETHOD(regnode_enable,           rk805_regnode_enable),
 538         REGNODEMETHOD(regnode_status,           rk805_regnode_status),
 539         REGNODEMETHOD(regnode_set_voltage,      rk805_regnode_set_voltage),
 540         REGNODEMETHOD(regnode_get_voltage,      rk805_regnode_get_voltage),
 541         REGNODEMETHOD(regnode_check_voltage,    regnode_method_check_voltage),
 542         REGNODEMETHOD_END
 543 };
 544 DEFINE_CLASS_1(rk805_regnode, rk805_regnode_class, rk805_regnode_methods,
 545     sizeof(struct rk805_reg_sc), regnode_class);
 546
 547 static struct rk805_reg_sc *
 548 rk805_reg_attach(device_t dev, phandle_t node,
 549     struct rk805_regdef *def)
 550 {
 551         struct rk805_reg_sc *reg_sc;
 552         struct regnode_init_def initdef;
 553         struct regnode *regnode;
 554
 555         memset(&initdef, 0, sizeof(initdef));
 556         if (regulator_parse_ofw_stdparam(dev, node, &initdef) != 0) {
 557                 device_printf(dev, "cannot create regulator\n");
 558                 return (NULL);
 559         }
 560         if (initdef.std_param.min_uvolt == 0)
 561                 initdef.std_param.min_uvolt = def->voltage_min;
 562         if (initdef.std_param.max_uvolt == 0)
 563                 initdef.std_param.max_uvolt = def->voltage_max;
 564         initdef.id = def->id;
 565         initdef.ofw_node = node;
 566
 567         regnode = regnode_create(dev, &rk805_regnode_class, &initdef);
 568         if (regnode == NULL) {
 569                 device_printf(dev, "cannot create regulator\n");
 570                 return (NULL);
 571         }
 572
 573         reg_sc = regnode_get_softc(regnode);
 574         reg_sc->regnode = regnode;
 575         reg_sc->base_dev = dev;
 576         reg_sc->def = def;
 577         reg_sc->xref = OF_xref_from_node(node);
 578         reg_sc->param = regnode_get_stdparam(regnode);
 579
 580         regnode_register(regnode);
 581
 582         return (reg_sc);
 583 }
 584
 585 static int
 586 rk805_probe(device_t dev)
 587 {
 588         if (!ofw_bus_status_okay(dev))
 589                 return (ENXIO);
 590
 591         if (ofw_bus_search_compatible(dev, compat_data)->ocd_data == 0)
 592                 return (ENXIO);
 593
 594         device_set_desc(dev, "RockChip RK805 PMIC");
 595         return (BUS_PROBE_DEFAULT);
 596 }
 597
 598 static void
 599 rk805_start(void *pdev)
 600 {
 601         struct rk805_softc *sc;
 602         device_t dev;
 603         uint8_t data[2];
 604         int err;
 605
 606         dev = pdev;
 607         sc = device_get_softc(dev);
 608         sc->dev = dev;
 609
 610         /* No version register in RK808 */
 611         if (bootverbose && sc->type == RK805) {
 612                 err = rk805_read(dev, RK805_CHIP_NAME, data, 1);
 613                 if (err != 0) {
 614                         device_printf(dev, "Cannot read chip name reg\n");
 615                         return;
 616                 }
 617                 err = rk805_read(dev, RK805_CHIP_VER, data + 1, 1);
 618                 if (err != 0) {
 619                         device_printf(dev, "Cannot read chip version reg\n");
 620                         return;
 621                 }
 622                 device_printf(dev, "Chip Name: %x\n",
 623                     data[0] << 4 | ((data[1] >> 4) & 0xf));
 624                 device_printf(dev, "Chip Version: %x\n", data[1] & 0xf);
 625         }
 626
 627         config_intrhook_disestablish(&sc->intr_hook);
 628 }
 629
 630 static int
 631 rk805_attach(device_t dev)
 632 {
 633         struct rk805_softc *sc;
 634         struct rk805_reg_sc *reg;
 635         struct rk805_regdef *regdefs;
 636         struct reg_list *regp;
 637         phandle_t rnode, child;
 638         int i;
 639
 640         sc = device_get_softc(dev);
 641
 642         sc->intr_hook.ich_func = rk805_start;
 643         sc->intr_hook.ich_arg = dev;
 644
 645         if (config_intrhook_establish(&sc->intr_hook) != 0)
 646                 return (ENOMEM);
 647
 648         sc->type = ofw_bus_search_compatible(dev, compat_data)->ocd_data;
 649         switch (sc->type) {
 650         case RK805:
 651                 regdefs = rk805_regdefs;
 652                 sc->nregs = nitems(rk805_regdefs);
 653                 break;
 654         case RK808:
 655                 regdefs = rk808_regdefs;
 656                 sc->nregs = nitems(rk808_regdefs);
 657                 break;
 658         default:
 659                 device_printf(dev, "Unknown type %d\n", sc->type);
 660                 return (ENXIO);
 661         }
 662
 663         TAILQ_INIT(&sc->regs);
 664
 665         rnode = ofw_bus_find_child(ofw_bus_get_node(dev), "regulators");
 666         if (rnode > 0) {
 667                 for (i = 0; i < sc->nregs; i++) {
 668                         child = ofw_bus_find_child(rnode,
 669                             regdefs[i].name);
 670                         if (child == 0)
 671                                 continue;
 672                         if (OF_hasprop(child, "regulator-name") != 1)
 673                                 continue;
 674                         reg = rk805_reg_attach(dev, child, &regdefs[i]);
 675                         if (reg == NULL) {
 676                                 device_printf(dev,
 677                                     "cannot attach regulator %s\n",
 678                                     regdefs[i].name);
 679                                 continue;
 680                         }
 681                         regp = malloc(sizeof(*regp), M_DEVBUF, M_WAITOK | M_ZERO);
 682                         regp->reg = reg;
 683                         TAILQ_INSERT_TAIL(&sc->regs, regp, next);
 684                         if (bootverbose)
 685                                 device_printf(dev, "Regulator %s attached\n",
 686                                     regdefs[i].name);
 687                 }
 688         }
 689
 690         return (0);
 691 }
 692
 693 static int
 694 rk805_detach(device_t dev)
 695 {
 696
 697         /* We cannot detach regulators */
 698         return (EBUSY);
 699 }
 700
 701 static int
 702 rk805_map(device_t dev, phandle_t xref, int ncells,
 703     pcell_t *cells, intptr_t *id)
 704 {
 705         struct rk805_softc *sc;
 706         struct reg_list *regp;
 707
 708         sc = device_get_softc(dev);
 709
 710         TAILQ_FOREACH(regp, &sc->regs, next) {
 711                 if (regp->reg->xref == xref) {
 712                         *id = regp->reg->def->id;
 713                         return (0);
 714                 }
 715         }
 716
 717         return (ERANGE);
 718 }
 719
 720 static device_method_t rk805_methods[] = {
 721         DEVMETHOD(device_probe,         rk805_probe),
 722         DEVMETHOD(device_attach,        rk805_attach),
 723         DEVMETHOD(device_detach,        rk805_detach),
 724
 725         /* regdev interface */
 726         DEVMETHOD(regdev_map,           rk805_map),
 727         DEVMETHOD_END
 728 };
 729
 730 static driver_t rk805_driver = {
 731         "rk805_pmu",
 732         rk805_methods,
 733         sizeof(struct rk805_softc),
 734 };
 735
 736 static devclass_t rk805_devclass;
 737
 738 EARLY_DRIVER_MODULE(rk805, iicbus, rk805_driver, rk805_devclass, 0, 0,
 739     BUS_PASS_INTERRUPT + BUS_PASS_ORDER_LAST);
 740 MODULE_DEPEND(rk805, iicbus, IICBUS_MINVER, IICBUS_PREFVER, IICBUS_MAXVER);
 741 MODULE_VERSION(rk805, 1);