drivers/soc/rockchip/pm_domains.c

   1 /*
   2  * Rockchip Generic power domain support.
   3  *
   4  * Copyright (c) 2015 ROCKCHIP, Co. Ltd.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/io.h>
  12 #include <linux/iopoll.h>
  13 #include <linux/err.h>
  14 #include <linux/pm_clock.h>
  15 #include <linux/pm_domain.h>
  16 #include <linux/of_address.h>
  17 #include <linux/of_platform.h>
  18 #include <linux/clk.h>
  19 #include <linux/regmap.h>
  20 #include <linux/mfd/syscon.h>
  21 #include <dt-bindings/power/rk3288-power.h>
  22 #include <dt-bindings/power/rk3368-power.h>
  23 #include <dt-bindings/power/rk3399-power.h>
  24
  25 struct rockchip_domain_info {
  26         int pwr_mask;
  27         int status_mask;
  28         int req_mask;
  29         int idle_mask;
  30         int ack_mask;
  31         bool active_wakeup;
  32 };
  33
  34 struct rockchip_pmu_info {
  35         u32 pwr_offset;
  36         u32 status_offset;
  37         u32 req_offset;
  38         u32 idle_offset;
  39         u32 ack_offset;
  40
  41         u32 core_pwrcnt_offset;
  42         u32 gpu_pwrcnt_offset;
  43
  44         unsigned int core_power_transition_time;
  45         unsigned int gpu_power_transition_time;
  46
  47         int num_domains;
  48         const struct rockchip_domain_info *domain_info;
  49 };
  50
  51 #define MAX_QOS_REGS_NUM        5
  52 #define QOS_PRIORITY            0x08
  53 #define QOS_MODE                0x0c
  54 #define QOS_BANDWIDTH           0x10
  55 #define QOS_SATURATION          0x14
  56 #define QOS_EXTCONTROL          0x18
  57
  58 struct rockchip_pm_domain {
  59         struct generic_pm_domain genpd;
  60         const struct rockchip_domain_info *info;
  61         struct rockchip_pmu *pmu;
  62         int num_qos;
  63         struct regmap **qos_regmap;
  64         u32 *qos_save_regs[MAX_QOS_REGS_NUM];
  65         int num_clks;
  66         struct clk *clks[];
  67 };
  68
  69 struct rockchip_pmu {
  70         struct device *dev;
  71         struct regmap *regmap;
  72         const struct rockchip_pmu_info *info;
  73         struct mutex mutex; /* mutex lock for pmu */
  74         struct genpd_onecell_data genpd_data;
  75         struct generic_pm_domain *domains[];
  76 };
  77
  78 #define to_rockchip_pd(gpd) container_of(gpd, struct rockchip_pm_domain, genpd)
  79
  80 #define DOMAIN(pwr, status, req, idle, ack, wakeup)     \
  81 {                                               \
  82         .pwr_mask = (pwr >= 0) ? BIT(pwr) : 0,          \
  83         .status_mask = (status >= 0) ? BIT(status) : 0, \
  84         .req_mask = (req >= 0) ? BIT(req) : 0,          \
  85         .idle_mask = (idle >= 0) ? BIT(idle) : 0,       \
  86         .ack_mask = (ack >= 0) ? BIT(ack) : 0,          \
  87         .active_wakeup = wakeup,                        \
  88 }
  89
  90 #define DOMAIN_RK3288(pwr, status, req, wakeup)         \
  91         DOMAIN(pwr, status, req, req, (req) + 16, wakeup)
  92
  93 #define DOMAIN_RK3368(pwr, status, req, wakeup)         \
  94         DOMAIN(pwr, status, req, (req) + 16, req, wakeup)
  95
  96 #define DOMAIN_RK3399(pwr, status, req, wakeup)         \
  97         DOMAIN(pwr, status, req, req, req, wakeup)
  98
  99 static bool rockchip_pmu_domain_is_idle(struct rockchip_pm_domain *pd)
 100 {
 101         struct rockchip_pmu *pmu = pd->pmu;
 102         const struct rockchip_domain_info *pd_info = pd->info;
 103         unsigned int val;
 104
 105         regmap_read(pmu->regmap, pmu->info->idle_offset, &val);
 106         return (val & pd_info->idle_mask) == pd_info->idle_mask;
 107 }
 108
 109 static unsigned int rockchip_pmu_read_ack(struct rockchip_pmu *pmu)
 110 {
 111         unsigned int val;
 112
 113         regmap_read(pmu->regmap, pmu->info->ack_offset, &val);
 114         return val;
 115 }
 116
 117 static int rockchip_pmu_set_idle_request(struct rockchip_pm_domain *pd,
 118                                          bool idle)
 119 {
 120         const struct rockchip_domain_info *pd_info = pd->info;
 121         struct generic_pm_domain *genpd = &pd->genpd;
 122         struct rockchip_pmu *pmu = pd->pmu;
 123         unsigned int target_ack;
 124         unsigned int val;
 125         bool is_idle;
 126         int ret;
 127
 128         if (pd_info->req_mask == 0)
 129                 return 0;
 130
 131         regmap_update_bits(pmu->regmap, pmu->info->req_offset,
 132                            pd_info->req_mask, idle ? -1U : 0);
 133
 134         dsb(sy);
 135
 136         /* Wait util idle_ack = 1 */
 137         target_ack = idle ? pd_info->ack_mask : 0;
 138         ret = readx_poll_timeout_atomic(rockchip_pmu_read_ack, pmu, val,
 139                                         (val & pd_info->ack_mask) == target_ack,
 140                                         0, 10000);
 141         if (ret) {
 142                 dev_err(pmu->dev,
 143                         "failed to get ack on domain '%s', val=0x%x\n",
 144                         genpd->name, val);
 145                 return ret;
 146         }
 147
 148         ret = readx_poll_timeout_atomic(rockchip_pmu_domain_is_idle, pd,
 149                                         is_idle, is_idle == idle, 0, 10000);
 150         if (ret) {
 151                 dev_err(pmu->dev,
 152                         "failed to set idle on domain '%s', val=%d\n",
 153                         genpd->name, is_idle);
 154                 return ret;
 155         }
 156
 157         return 0;
 158 }
 159
 160 static int rockchip_pmu_save_qos(struct rockchip_pm_domain *pd)
 161 {
 162         int i;
 163
 164         for (i = 0; i < pd->num_qos; i++) {
 165                 regmap_read(pd->qos_regmap[i],
 166                             QOS_PRIORITY,
 167                             &pd->qos_save_regs[0][i]);
 168                 regmap_read(pd->qos_regmap[i],
 169                             QOS_MODE,
 170                             &pd->qos_save_regs[1][i]);
 171                 regmap_read(pd->qos_regmap[i],
 172                             QOS_BANDWIDTH,
 173                             &pd->qos_save_regs[2][i]);
 174                 regmap_read(pd->qos_regmap[i],
 175                             QOS_SATURATION,
 176                             &pd->qos_save_regs[3][i]);
 177                 regmap_read(pd->qos_regmap[i],
 178                             QOS_EXTCONTROL,
 179                             &pd->qos_save_regs[4][i]);
 180         }
 181         return 0;
 182 }
 183
 184 static int rockchip_pmu_restore_qos(struct rockchip_pm_domain *pd)
 185 {
 186         int i;
 187
 188         for (i = 0; i < pd->num_qos; i++) {
 189                 regmap_write(pd->qos_regmap[i],
 190                              QOS_PRIORITY,
 191                              pd->qos_save_regs[0][i]);
 192                 regmap_write(pd->qos_regmap[i],
 193                              QOS_MODE,
 194                              pd->qos_save_regs[1][i]);
 195                 regmap_write(pd->qos_regmap[i],
 196                              QOS_BANDWIDTH,
 197                              pd->qos_save_regs[2][i]);
 198                 regmap_write(pd->qos_regmap[i],
 199                              QOS_SATURATION,
 200                              pd->qos_save_regs[3][i]);
 201                 regmap_write(pd->qos_regmap[i],
 202                              QOS_EXTCONTROL,
 203                              pd->qos_save_regs[4][i]);
 204         }
 205
 206         return 0;
 207 }
 208
 209 static bool rockchip_pmu_domain_is_on(struct rockchip_pm_domain *pd)
 210 {
 211         struct rockchip_pmu *pmu = pd->pmu;
 212         unsigned int val;
 213
 214         /* check idle status for idle-only domains */
 215         if (pd->info->status_mask == 0)
 216                 return !rockchip_pmu_domain_is_idle(pd);
 217
 218         regmap_read(pmu->regmap, pmu->info->status_offset, &val);
 219
 220         /* 1'b0: power on, 1'b1: power off */
 221         return !(val & pd->info->status_mask);
 222 }
 223
 224 static void rockchip_do_pmu_set_power_domain(struct rockchip_pm_domain *pd,
 225                                              bool on)
 226 {
 227         struct rockchip_pmu *pmu = pd->pmu;
 228         struct generic_pm_domain *genpd = &pd->genpd;
 229         bool is_on;
 230
 231         if (pd->info->pwr_mask == 0)
 232                 return;
 233
 234         regmap_update_bits(pmu->regmap, pmu->info->pwr_offset,
 235                            pd->info->pwr_mask, on ? 0 : -1U);
 236
 237         dsb(sy);
 238
 239         if (readx_poll_timeout_atomic(rockchip_pmu_domain_is_on, pd, is_on,
 240                                       is_on == on, 0, 10000)) {
 241                 dev_err(pmu->dev,
 242                         "failed to set domain '%s', val=%d\n",
 243                         genpd->name, is_on);
 244                 return;
 245         }
 246 }
 247
 248 static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on)
 249 {
 250         int i;
 251
 252         mutex_lock(&pd->pmu->mutex);
 253
 254         if (rockchip_pmu_domain_is_on(pd) != power_on) {
 255                 for (i = 0; i < pd->num_clks; i++)
 256                         clk_enable(pd->clks[i]);
 257
 258                 if (!power_on) {
 259                         rockchip_pmu_save_qos(pd);
 260
 261                         /* if powering down, idle request to NIU first */
 262                         rockchip_pmu_set_idle_request(pd, true);
 263                 }
 264
 265                 rockchip_do_pmu_set_power_domain(pd, power_on);
 266
 267                 if (power_on) {
 268                         /* if powering up, leave idle mode */
 269                         rockchip_pmu_set_idle_request(pd, false);
 270
 271                         rockchip_pmu_restore_qos(pd);
 272                 }
 273
 274                 for (i = pd->num_clks - 1; i >= 0; i--)
 275                         clk_disable(pd->clks[i]);
 276         }
 277
 278         mutex_unlock(&pd->pmu->mutex);
 279         return 0;
 280 }
 281
 282 static int rockchip_pd_power_on(struct generic_pm_domain *domain)
 283 {
 284         struct rockchip_pm_domain *pd = to_rockchip_pd(domain);
 285
 286         return rockchip_pd_power(pd, true);
 287 }
 288
 289 static int rockchip_pd_power_off(struct generic_pm_domain *domain)
 290 {
 291         struct rockchip_pm_domain *pd = to_rockchip_pd(domain);
 292
 293         return rockchip_pd_power(pd, false);
 294 }
 295
 296 static int rockchip_pd_attach_dev(struct generic_pm_domain *genpd,
 297                                   struct device *dev)
 298 {
 299         struct clk *clk;
 300         int i;
 301         int error;
 302
 303         dev_dbg(dev, "attaching to power domain '%s'\n", genpd->name);
 304
 305         error = pm_clk_create(dev);
 306         if (error) {
 307                 dev_err(dev, "pm_clk_create failed %d\n", error);
 308                 return error;
 309         }
 310
 311         i = 0;
 312         while ((clk = of_clk_get(dev->of_node, i++)) && !IS_ERR(clk)) {
 313                 dev_dbg(dev, "adding clock '%pC' to list of PM clocks\n", clk);
 314                 error = pm_clk_add_clk(dev, clk);
 315                 if (error) {
 316                         dev_err(dev, "pm_clk_add_clk failed %d\n", error);
 317                         clk_put(clk);
 318                         pm_clk_destroy(dev);
 319                         return error;
 320                 }
 321         }
 322
 323         return 0;
 324 }
 325
 326 static void rockchip_pd_detach_dev(struct generic_pm_domain *genpd,
 327                                    struct device *dev)
 328 {
 329         dev_dbg(dev, "detaching from power domain '%s'\n", genpd->name);
 330
 331         pm_clk_destroy(dev);
 332 }
 333
 334 static bool rockchip_active_wakeup(struct device *dev)
 335 {
 336         struct generic_pm_domain *genpd;
 337         struct rockchip_pm_domain *pd;
 338
 339         genpd = pd_to_genpd(dev->pm_domain);
 340         pd = container_of(genpd, struct rockchip_pm_domain, genpd);
 341
 342         return pd->info->active_wakeup;
 343 }
 344
 345 static int rockchip_pm_add_one_domain(struct rockchip_pmu *pmu,
 346                                       struct device_node *node)
 347 {
 348         const struct rockchip_domain_info *pd_info;
 349         struct rockchip_pm_domain *pd;
 350         struct device_node *qos_node;
 351         struct clk *clk;
 352         int clk_cnt;
 353         int i, j;
 354         u32 id;
 355         int error;
 356
 357         error = of_property_read_u32(node, "reg", &id);
 358         if (error) {
 359                 dev_err(pmu->dev,
 360                         "%s: failed to retrieve domain id (reg): %d\n",
 361                         node->name, error);
 362                 return -EINVAL;
 363         }
 364
 365         if (id >= pmu->info->num_domains) {
 366                 dev_err(pmu->dev, "%s: invalid domain id %d\n",
 367                         node->name, id);
 368                 return -EINVAL;
 369         }
 370
 371         pd_info = &pmu->info->domain_info[id];
 372         if (!pd_info) {
 373                 dev_err(pmu->dev, "%s: undefined domain id %d\n",
 374                         node->name, id);
 375                 return -EINVAL;
 376         }
 377
 378         clk_cnt = of_count_phandle_with_args(node, "clocks", "#clock-cells");
 379         pd = devm_kzalloc(pmu->dev,
 380                           sizeof(*pd) + clk_cnt * sizeof(pd->clks[0]),
 381                           GFP_KERNEL);
 382         if (!pd)
 383                 return -ENOMEM;
 384
 385         pd->info = pd_info;
 386         pd->pmu = pmu;
 387
 388         for (i = 0; i < clk_cnt; i++) {
 389                 clk = of_clk_get(node, i);
 390                 if (IS_ERR(clk)) {
 391                         error = PTR_ERR(clk);
 392                         dev_err(pmu->dev,
 393                                 "%s: failed to get clk at index %d: %d\n",
 394                                 node->name, i, error);
 395                         goto err_out;
 396                 }
 397
 398                 error = clk_prepare(clk);
 399                 if (error) {
 400                         dev_err(pmu->dev,
 401                                 "%s: failed to prepare clk %pC (index %d): %d\n",
 402                                 node->name, clk, i, error);
 403                         clk_put(clk);
 404                         goto err_out;
 405                 }
 406
 407                 pd->clks[pd->num_clks++] = clk;
 408
 409                 dev_dbg(pmu->dev, "added clock '%pC' to domain '%s'\n",
 410                         clk, node->name);
 411         }
 412
 413         pd->num_qos = of_count_phandle_with_args(node, "pm_qos",
 414                                                  NULL);
 415
 416         if (pd->num_qos > 0) {
 417                 pd->qos_regmap = devm_kcalloc(pmu->dev, pd->num_qos,
 418                                               sizeof(*pd->qos_regmap),
 419                                               GFP_KERNEL);
 420                 if (!pd->qos_regmap) {
 421                         error = -ENOMEM;
 422                         goto err_out;
 423                 }
 424
 425                 for (j = 0; j < MAX_QOS_REGS_NUM; j++) {
 426                         pd->qos_save_regs[j] = devm_kcalloc(pmu->dev,
 427                                                             pd->num_qos,
 428                                                             sizeof(u32),
 429                                                             GFP_KERNEL);
 430                         if (!pd->qos_save_regs[j]) {
 431                                 error = -ENOMEM;
 432                                 goto err_out;
 433                         }
 434                 }
 435
 436                 for (j = 0; j < pd->num_qos; j++) {
 437                         qos_node = of_parse_phandle(node, "pm_qos", j);
 438                         if (!qos_node) {
 439                                 error = -ENODEV;
 440                                 goto err_out;
 441                         }
 442                         pd->qos_regmap[j] = syscon_node_to_regmap(qos_node);
 443                         if (IS_ERR(pd->qos_regmap[j])) {
 444                                 error = -ENODEV;
 445                                 of_node_put(qos_node);
 446                                 goto err_out;
 447                         }
 448                         of_node_put(qos_node);
 449                 }
 450         }
 451
 452         error = rockchip_pd_power(pd, true);
 453         if (error) {
 454                 dev_err(pmu->dev,
 455                         "failed to power on domain '%s': %d\n",
 456                         node->name, error);
 457                 goto err_out;
 458         }
 459
 460         pd->genpd.name = node->name;
 461         pd->genpd.power_off = rockchip_pd_power_off;
 462         pd->genpd.power_on = rockchip_pd_power_on;
 463         pd->genpd.attach_dev = rockchip_pd_attach_dev;
 464         pd->genpd.detach_dev = rockchip_pd_detach_dev;
 465         pd->genpd.dev_ops.active_wakeup = rockchip_active_wakeup;
 466         pd->genpd.flags = GENPD_FLAG_PM_CLK;
 467         pm_genpd_init(&pd->genpd, NULL, false);
 468
 469         pmu->genpd_data.domains[id] = &pd->genpd;
 470         return 0;
 471
 472 err_out:
 473         while (--i >= 0) {
 474                 clk_unprepare(pd->clks[i]);
 475                 clk_put(pd->clks[i]);
 476         }
 477         return error;
 478 }
 479
 480 static void rockchip_pm_remove_one_domain(struct rockchip_pm_domain *pd)
 481 {
 482         int i, ret;
 483
 484         /*
 485          * We're in the error cleanup already, so we only complain,
 486          * but won't emit another error on top of the original one.
 487          */
 488         ret = pm_genpd_remove(&pd->genpd);
 489         if (ret < 0)
 490                 dev_err(pd->pmu->dev, "failed to remove domain '%s' : %d - state may be inconsistent\n",
 491                         pd->genpd.name, ret);
 492
 493         for (i = 0; i < pd->num_clks; i++) {
 494                 clk_unprepare(pd->clks[i]);
 495                 clk_put(pd->clks[i]);
 496         }
 497
 498         /* protect the zeroing of pm->num_clks */
 499         mutex_lock(&pd->pmu->mutex);
 500         pd->num_clks = 0;
 501         mutex_unlock(&pd->pmu->mutex);
 502
 503         /* devm will free our memory */
 504 }
 505
 506 static void rockchip_pm_domain_cleanup(struct rockchip_pmu *pmu)
 507 {
 508         struct generic_pm_domain *genpd;
 509         struct rockchip_pm_domain *pd;
 510         int i;
 511
 512         for (i = 0; i < pmu->genpd_data.num_domains; i++) {
 513                 genpd = pmu->genpd_data.domains[i];
 514                 if (genpd) {
 515                         pd = to_rockchip_pd(genpd);
 516                         rockchip_pm_remove_one_domain(pd);
 517                 }
 518         }
 519
 520         /* devm will free our memory */
 521 }
 522
 523 static void rockchip_configure_pd_cnt(struct rockchip_pmu *pmu,
 524                                       u32 domain_reg_offset,
 525                                       unsigned int count)
 526 {
 527         /* First configure domain power down transition count ... */
 528         regmap_write(pmu->regmap, domain_reg_offset, count);
 529         /* ... and then power up count. */
 530         regmap_write(pmu->regmap, domain_reg_offset + 4, count);
 531 }
 532
 533 static int rockchip_pm_add_subdomain(struct rockchip_pmu *pmu,
 534                                      struct device_node *parent)
 535 {
 536         struct device_node *np;
 537         struct generic_pm_domain *child_domain, *parent_domain;
 538         int error;
 539
 540         for_each_child_of_node(parent, np) {
 541                 u32 idx;
 542
 543                 error = of_property_read_u32(parent, "reg", &idx);
 544                 if (error) {
 545                         dev_err(pmu->dev,
 546                                 "%s: failed to retrieve domain id (reg): %d\n",
 547                                 parent->name, error);
 548                         goto err_out;
 549                 }
 550                 parent_domain = pmu->genpd_data.domains[idx];
 551
 552                 error = rockchip_pm_add_one_domain(pmu, np);
 553                 if (error) {
 554                         dev_err(pmu->dev, "failed to handle node %s: %d\n",
 555                                 np->name, error);
 556                         goto err_out;
 557                 }
 558
 559                 error = of_property_read_u32(np, "reg", &idx);
 560                 if (error) {
 561                         dev_err(pmu->dev,
 562                                 "%s: failed to retrieve domain id (reg): %d\n",
 563                                 np->name, error);
 564                         goto err_out;
 565                 }
 566                 child_domain = pmu->genpd_data.domains[idx];
 567
 568                 error = pm_genpd_add_subdomain(parent_domain, child_domain);
 569                 if (error) {
 570                         dev_err(pmu->dev, "%s failed to add subdomain %s: %d\n",
 571                                 parent_domain->name, child_domain->name, error);
 572                         goto err_out;
 573                 } else {
 574                         dev_dbg(pmu->dev, "%s add subdomain: %s\n",
 575                                 parent_domain->name, child_domain->name);
 576                 }
 577
 578                 rockchip_pm_add_subdomain(pmu, np);
 579         }
 580
 581         return 0;
 582
 583 err_out:
 584         of_node_put(np);
 585         return error;
 586 }
 587
 588 static int rockchip_pm_domain_probe(struct platform_device *pdev)
 589 {
 590         struct device *dev = &pdev->dev;
 591         struct device_node *np = dev->of_node;
 592         struct device_node *node;
 593         struct device *parent;
 594         struct rockchip_pmu *pmu;
 595         const struct of_device_id *match;
 596         const struct rockchip_pmu_info *pmu_info;
 597         int error;
 598
 599         if (!np) {
 600                 dev_err(dev, "device tree node not found\n");
 601                 return -ENODEV;
 602         }
 603
 604         match = of_match_device(dev->driver->of_match_table, dev);
 605         if (!match || !match->data) {
 606                 dev_err(dev, "missing pmu data\n");
 607                 return -EINVAL;
 608         }
 609
 610         pmu_info = match->data;
 611
 612         pmu = devm_kzalloc(dev,
 613                            sizeof(*pmu) +
 614                                 pmu_info->num_domains * sizeof(pmu->domains[0]),
 615                            GFP_KERNEL);
 616         if (!pmu)
 617                 return -ENOMEM;
 618
 619         pmu->dev = &pdev->dev;
 620         mutex_init(&pmu->mutex);
 621
 622         pmu->info = pmu_info;
 623
 624         pmu->genpd_data.domains = pmu->domains;
 625         pmu->genpd_data.num_domains = pmu_info->num_domains;
 626
 627         parent = dev->parent;
 628         if (!parent) {
 629                 dev_err(dev, "no parent for syscon devices\n");
 630                 return -ENODEV;
 631         }
 632
 633         pmu->regmap = syscon_node_to_regmap(parent->of_node);
 634         if (IS_ERR(pmu->regmap)) {
 635                 dev_err(dev, "no regmap available\n");
 636                 return PTR_ERR(pmu->regmap);
 637         }
 638
 639         /*
 640          * Configure power up and down transition delays for CORE
 641          * and GPU domains.
 642          */
 643         if (pmu_info->core_power_transition_time)
 644                 rockchip_configure_pd_cnt(pmu, pmu_info->core_pwrcnt_offset,
 645                                         pmu_info->core_power_transition_time);
 646         if (pmu_info->gpu_pwrcnt_offset)
 647                 rockchip_configure_pd_cnt(pmu, pmu_info->gpu_pwrcnt_offset,
 648                                         pmu_info->gpu_power_transition_time);
 649
 650         error = -ENODEV;
 651
 652         for_each_available_child_of_node(np, node) {
 653                 error = rockchip_pm_add_one_domain(pmu, node);
 654                 if (error) {
 655                         dev_err(dev, "failed to handle node %s: %d\n",
 656                                 node->name, error);
 657                         of_node_put(node);
 658                         goto err_out;
 659                 }
 660
 661                 error = rockchip_pm_add_subdomain(pmu, node);
 662                 if (error < 0) {
 663                         dev_err(dev, "failed to handle subdomain node %s: %d\n",
 664                                 node->name, error);
 665                         of_node_put(node);
 666                         goto err_out;
 667                 }
 668         }
 669
 670         if (error) {
 671                 dev_dbg(dev, "no power domains defined\n");
 672                 goto err_out;
 673         }
 674
 675         error = of_genpd_add_provider_onecell(np, &pmu->genpd_data);
 676         if (error) {
 677                 dev_err(dev, "failed to add provider: %d\n", error);
 678                 goto err_out;
 679         }
 680
 681         return 0;
 682
 683 err_out:
 684         rockchip_pm_domain_cleanup(pmu);
 685         return error;
 686 }
 687
 688 static const struct rockchip_domain_info rk3288_pm_domains[] = {
 689         [RK3288_PD_VIO]         = DOMAIN_RK3288(7, 7, 4, false),
 690         [RK3288_PD_HEVC]        = DOMAIN_RK3288(14, 10, 9, false),
 691         [RK3288_PD_VIDEO]       = DOMAIN_RK3288(8, 8, 3, false),
 692         [RK3288_PD_GPU]         = DOMAIN_RK3288(9, 9, 2, false),
 693 };
 694
 695 static const struct rockchip_domain_info rk3368_pm_domains[] = {
 696         [RK3368_PD_PERI]        = DOMAIN_RK3368(13, 12, 6, true),
 697         [RK3368_PD_VIO]         = DOMAIN_RK3368(15, 14, 8, false),
 698         [RK3368_PD_VIDEO]       = DOMAIN_RK3368(14, 13, 7, false),
 699         [RK3368_PD_GPU_0]       = DOMAIN_RK3368(16, 15, 2, false),
 700         [RK3368_PD_GPU_1]       = DOMAIN_RK3368(17, 16, 2, false),
 701 };
 702
 703 static const struct rockchip_domain_info rk3399_pm_domains[] = {
 704         [RK3399_PD_TCPD0]       = DOMAIN_RK3399(8, 8, -1, false),
 705         [RK3399_PD_TCPD1]       = DOMAIN_RK3399(9, 9, -1, false),
 706         [RK3399_PD_CCI]         = DOMAIN_RK3399(10, 10, -1, true),
 707         [RK3399_PD_CCI0]        = DOMAIN_RK3399(-1, -1, 15, true),
 708         [RK3399_PD_CCI1]        = DOMAIN_RK3399(-1, -1, 16, true),
 709         [RK3399_PD_PERILP]      = DOMAIN_RK3399(11, 11, 1, true),
 710         [RK3399_PD_PERIHP]      = DOMAIN_RK3399(12, 12, 2, true),
 711         [RK3399_PD_CENTER]      = DOMAIN_RK3399(13, 13, 14, true),
 712         [RK3399_PD_VIO]         = DOMAIN_RK3399(14, 14, 17, false),
 713         [RK3399_PD_GPU]         = DOMAIN_RK3399(15, 15, 0, false),
 714         [RK3399_PD_VCODEC]      = DOMAIN_RK3399(16, 16, 3, false),
 715         [RK3399_PD_VDU]         = DOMAIN_RK3399(17, 17, 4, false),
 716         [RK3399_PD_RGA]         = DOMAIN_RK3399(18, 18, 5, false),
 717         [RK3399_PD_IEP]         = DOMAIN_RK3399(19, 19, 6, false),
 718         [RK3399_PD_VO]          = DOMAIN_RK3399(20, 20, -1, false),
 719         [RK3399_PD_VOPB]        = DOMAIN_RK3399(-1, -1, 7, false),
 720         [RK3399_PD_VOPL]        = DOMAIN_RK3399(-1, -1, 8, false),
 721         [RK3399_PD_ISP0]        = DOMAIN_RK3399(22, 22, 9, false),
 722         [RK3399_PD_ISP1]        = DOMAIN_RK3399(23, 23, 10, false),
 723         [RK3399_PD_HDCP]        = DOMAIN_RK3399(24, 24, 11, false),
 724         [RK3399_PD_GMAC]        = DOMAIN_RK3399(25, 25, 23, true),
 725         [RK3399_PD_EMMC]        = DOMAIN_RK3399(26, 26, 24, true),
 726         [RK3399_PD_USB3]        = DOMAIN_RK3399(27, 27, 12, true),
 727         [RK3399_PD_EDP]         = DOMAIN_RK3399(28, 28, 22, false),
 728         [RK3399_PD_GIC]         = DOMAIN_RK3399(29, 29, 27, true),
 729         [RK3399_PD_SD]          = DOMAIN_RK3399(30, 30, 28, true),
 730         [RK3399_PD_SDIOAUDIO]   = DOMAIN_RK3399(31, 31, 29, true),
 731 };
 732
 733 static const struct rockchip_pmu_info rk3288_pmu = {
 734         .pwr_offset = 0x08,
 735         .status_offset = 0x0c,
 736         .req_offset = 0x10,
 737         .idle_offset = 0x14,
 738         .ack_offset = 0x14,
 739
 740         .core_pwrcnt_offset = 0x34,
 741         .gpu_pwrcnt_offset = 0x3c,
 742
 743         .core_power_transition_time = 24, /* 1us */
 744         .gpu_power_transition_time = 24, /* 1us */
 745
 746         .num_domains = ARRAY_SIZE(rk3288_pm_domains),
 747         .domain_info = rk3288_pm_domains,
 748 };
 749
 750 static const struct rockchip_pmu_info rk3368_pmu = {
 751         .pwr_offset = 0x0c,
 752         .status_offset = 0x10,
 753         .req_offset = 0x3c,
 754         .idle_offset = 0x40,
 755         .ack_offset = 0x40,
 756
 757         .core_pwrcnt_offset = 0x48,
 758         .gpu_pwrcnt_offset = 0x50,
 759
 760         .core_power_transition_time = 24,
 761         .gpu_power_transition_time = 24,
 762
 763         .num_domains = ARRAY_SIZE(rk3368_pm_domains),
 764         .domain_info = rk3368_pm_domains,
 765 };
 766
 767 static const struct rockchip_pmu_info rk3399_pmu = {
 768         .pwr_offset = 0x14,
 769         .status_offset = 0x18,
 770         .req_offset = 0x60,
 771         .idle_offset = 0x64,
 772         .ack_offset = 0x68,
 773
 774         /* ARM Trusted Firmware manages power transition times */
 775
 776         .num_domains = ARRAY_SIZE(rk3399_pm_domains),
 777         .domain_info = rk3399_pm_domains,
 778 };
 779
 780 static const struct of_device_id rockchip_pm_domain_dt_match[] = {
 781         {
 782                 .compatible = "rockchip,rk3288-power-controller",
 783                 .data = (void *)&rk3288_pmu,
 784         },
 785         {
 786                 .compatible = "rockchip,rk3368-power-controller",
 787                 .data = (void *)&rk3368_pmu,
 788         },
 789         {
 790                 .compatible = "rockchip,rk3399-power-controller",
 791                 .data = (void *)&rk3399_pmu,
 792         },
 793         { /* sentinel */ },
 794 };
 795
 796 static struct platform_driver rockchip_pm_domain_driver = {
 797         .probe = rockchip_pm_domain_probe,
 798         .driver = {
 799                 .name   = "rockchip-pm-domain",
 800                 .of_match_table = rockchip_pm_domain_dt_match,
 801                 /*
 802                  * We can't forcibly eject devices form power domain,
 803                  * so we can't really remove power domains once they
 804                  * were added.
 805                  */
 806                 .suppress_bind_attrs = true,
 807         },
 808 };
 809
 810 static int __init rockchip_pm_domain_drv_register(void)
 811 {
 812         return platform_driver_register(&rockchip_pm_domain_driver);
 813 }
 814 postcore_initcall(rockchip_pm_domain_drv_register);