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_clk.h>
  18 #include <linux/of_platform.h>
  19 #include <linux/clk.h>
  20 #include <linux/regmap.h>
  21 #include <linux/mfd/syscon.h>
  22 #include <dt-bindings/power/rk3288-power.h>
  23 #include <dt-bindings/power/rk3328-power.h>
  24 #include <dt-bindings/power/rk3366-power.h>
  25 #include <dt-bindings/power/rk3368-power.h>
  26 #include <dt-bindings/power/rk3399-power.h>
  27
  28 struct rockchip_domain_info {
  29         int pwr_mask;
  30         int status_mask;
  31         int req_mask;
  32         int idle_mask;
  33         int ack_mask;
  34         bool active_wakeup;
  35         int pwr_w_mask;
  36         int req_w_mask;
  37 };
  38
  39 struct rockchip_pmu_info {
  40         u32 pwr_offset;
  41         u32 status_offset;
  42         u32 req_offset;
  43         u32 idle_offset;
  44         u32 ack_offset;
  45
  46         u32 core_pwrcnt_offset;
  47         u32 gpu_pwrcnt_offset;
  48
  49         unsigned int core_power_transition_time;
  50         unsigned int gpu_power_transition_time;
  51
  52         int num_domains;
  53         const struct rockchip_domain_info *domain_info;
  54 };
  55
  56 #define MAX_QOS_REGS_NUM        5
  57 #define QOS_PRIORITY            0x08
  58 #define QOS_MODE                0x0c
  59 #define QOS_BANDWIDTH           0x10
  60 #define QOS_SATURATION          0x14
  61 #define QOS_EXTCONTROL          0x18
  62
  63 struct rockchip_pm_domain {
  64         struct generic_pm_domain genpd;
  65         const struct rockchip_domain_info *info;
  66         struct rockchip_pmu *pmu;
  67         int num_qos;
  68         struct regmap **qos_regmap;
  69         u32 *qos_save_regs[MAX_QOS_REGS_NUM];
  70         int num_clks;
  71         struct clk_bulk_data *clks;
  72 };
  73
  74 struct rockchip_pmu {
  75         struct device *dev;
  76         struct regmap *regmap;
  77         const struct rockchip_pmu_info *info;
  78         struct mutex mutex; /* mutex lock for pmu */
  79         struct genpd_onecell_data genpd_data;
  80         struct generic_pm_domain *domains[];
  81 };
  82
  83 #define to_rockchip_pd(gpd) container_of(gpd, struct rockchip_pm_domain, genpd)
  84
  85 #define DOMAIN(pwr, status, req, idle, ack, wakeup)     \
  86 {                                               \
  87         .pwr_mask = (pwr >= 0) ? BIT(pwr) : 0,          \
  88         .status_mask = (status >= 0) ? BIT(status) : 0, \
  89         .req_mask = (req >= 0) ? BIT(req) : 0,          \
  90         .idle_mask = (idle >= 0) ? BIT(idle) : 0,       \
  91         .ack_mask = (ack >= 0) ? BIT(ack) : 0,          \
  92         .active_wakeup = wakeup,                        \
  93 }
  94
  95 #define DOMAIN_M(pwr, status, req, idle, ack, wakeup)   \
  96 {                                                       \
  97         .pwr_w_mask = (pwr >= 0) ? BIT(pwr + 16) : 0,   \
  98         .pwr_mask = (pwr >= 0) ? BIT(pwr) : 0,          \
  99         .status_mask = (status >= 0) ? BIT(status) : 0, \
 100         .req_w_mask = (req >= 0) ?  BIT(req + 16) : 0,  \
 101         .req_mask = (req >= 0) ?  BIT(req) : 0,         \
 102         .idle_mask = (idle >= 0) ? BIT(idle) : 0,       \
 103         .ack_mask = (ack >= 0) ? BIT(ack) : 0,          \
 104         .active_wakeup = wakeup,                        \
 105 }
 106
 107 #define DOMAIN_RK3288(pwr, status, req, wakeup)         \
 108         DOMAIN(pwr, status, req, req, (req) + 16, wakeup)
 109
 110 #define DOMAIN_RK3328(pwr, status, req, wakeup)         \
 111         DOMAIN_M(pwr, pwr, req, (req) + 10, req, wakeup)
 112
 113 #define DOMAIN_RK3368(pwr, status, req, wakeup)         \
 114         DOMAIN(pwr, status, req, (req) + 16, req, wakeup)
 115
 116 #define DOMAIN_RK3399(pwr, status, req, wakeup)         \
 117         DOMAIN(pwr, status, req, req, req, wakeup)
 118
 119 static bool rockchip_pmu_domain_is_idle(struct rockchip_pm_domain *pd)
 120 {
 121         struct rockchip_pmu *pmu = pd->pmu;
 122         const struct rockchip_domain_info *pd_info = pd->info;
 123         unsigned int val;
 124
 125         regmap_read(pmu->regmap, pmu->info->idle_offset, &val);
 126         return (val & pd_info->idle_mask) == pd_info->idle_mask;
 127 }
 128
 129 static unsigned int rockchip_pmu_read_ack(struct rockchip_pmu *pmu)
 130 {
 131         unsigned int val;
 132
 133         regmap_read(pmu->regmap, pmu->info->ack_offset, &val);
 134         return val;
 135 }
 136
 137 static int rockchip_pmu_set_idle_request(struct rockchip_pm_domain *pd,
 138                                          bool idle)
 139 {
 140         const struct rockchip_domain_info *pd_info = pd->info;
 141         struct generic_pm_domain *genpd = &pd->genpd;
 142         struct rockchip_pmu *pmu = pd->pmu;
 143         unsigned int target_ack;
 144         unsigned int val;
 145         bool is_idle;
 146         int ret;
 147
 148         if (pd_info->req_mask == 0)
 149                 return 0;
 150         else if (pd_info->req_w_mask)
 151                 regmap_write(pmu->regmap, pmu->info->req_offset,
 152                              idle ? (pd_info->req_mask | pd_info->req_w_mask) :
 153                              pd_info->req_w_mask);
 154         else
 155                 regmap_update_bits(pmu->regmap, pmu->info->req_offset,
 156                                    pd_info->req_mask, idle ? -1U : 0);
 157
 158         dsb(sy);
 159
 160         /* Wait util idle_ack = 1 */
 161         target_ack = idle ? pd_info->ack_mask : 0;
 162         ret = readx_poll_timeout_atomic(rockchip_pmu_read_ack, pmu, val,
 163                                         (val & pd_info->ack_mask) == target_ack,
 164                                         0, 10000);
 165         if (ret) {
 166                 dev_err(pmu->dev,
 167                         "failed to get ack on domain '%s', val=0x%x\n",
 168                         genpd->name, val);
 169                 return ret;
 170         }
 171
 172         ret = readx_poll_timeout_atomic(rockchip_pmu_domain_is_idle, pd,
 173                                         is_idle, is_idle == idle, 0, 10000);
 174         if (ret) {
 175                 dev_err(pmu->dev,
 176                         "failed to set idle on domain '%s', val=%d\n",
 177                         genpd->name, is_idle);
 178                 return ret;
 179         }
 180
 181         return 0;
 182 }
 183
 184 static int rockchip_pmu_save_qos(struct rockchip_pm_domain *pd)
 185 {
 186         int i;
 187
 188         for (i = 0; i < pd->num_qos; i++) {
 189                 regmap_read(pd->qos_regmap[i],
 190                             QOS_PRIORITY,
 191                             &pd->qos_save_regs[0][i]);
 192                 regmap_read(pd->qos_regmap[i],
 193                             QOS_MODE,
 194                             &pd->qos_save_regs[1][i]);
 195                 regmap_read(pd->qos_regmap[i],
 196                             QOS_BANDWIDTH,
 197                             &pd->qos_save_regs[2][i]);
 198                 regmap_read(pd->qos_regmap[i],
 199                             QOS_SATURATION,
 200                             &pd->qos_save_regs[3][i]);
 201                 regmap_read(pd->qos_regmap[i],
 202                             QOS_EXTCONTROL,
 203                             &pd->qos_save_regs[4][i]);
 204         }
 205         return 0;
 206 }
 207
 208 static int rockchip_pmu_restore_qos(struct rockchip_pm_domain *pd)
 209 {
 210         int i;
 211
 212         for (i = 0; i < pd->num_qos; i++) {
 213                 regmap_write(pd->qos_regmap[i],
 214                              QOS_PRIORITY,
 215                              pd->qos_save_regs[0][i]);
 216                 regmap_write(pd->qos_regmap[i],
 217                              QOS_MODE,
 218                              pd->qos_save_regs[1][i]);
 219                 regmap_write(pd->qos_regmap[i],
 220                              QOS_BANDWIDTH,
 221                              pd->qos_save_regs[2][i]);
 222                 regmap_write(pd->qos_regmap[i],
 223                              QOS_SATURATION,
 224                              pd->qos_save_regs[3][i]);
 225                 regmap_write(pd->qos_regmap[i],
 226                              QOS_EXTCONTROL,
 227                              pd->qos_save_regs[4][i]);
 228         }
 229
 230         return 0;
 231 }
 232
 233 static bool rockchip_pmu_domain_is_on(struct rockchip_pm_domain *pd)
 234 {
 235         struct rockchip_pmu *pmu = pd->pmu;
 236         unsigned int val;
 237
 238         /* check idle status for idle-only domains */
 239         if (pd->info->status_mask == 0)
 240                 return !rockchip_pmu_domain_is_idle(pd);
 241
 242         regmap_read(pmu->regmap, pmu->info->status_offset, &val);
 243
 244         /* 1'b0: power on, 1'b1: power off */
 245         return !(val & pd->info->status_mask);
 246 }
 247
 248 static void rockchip_do_pmu_set_power_domain(struct rockchip_pm_domain *pd,
 249                                              bool on)
 250 {
 251         struct rockchip_pmu *pmu = pd->pmu;
 252         struct generic_pm_domain *genpd = &pd->genpd;
 253         bool is_on;
 254
 255         if (pd->info->pwr_mask == 0)
 256                 return;
 257         else if (pd->info->pwr_w_mask)
 258                 regmap_write(pmu->regmap, pmu->info->pwr_offset,
 259                              on ? pd->info->pwr_mask :
 260                              (pd->info->pwr_mask | pd->info->pwr_w_mask));
 261         else
 262                 regmap_update_bits(pmu->regmap, pmu->info->pwr_offset,
 263                                    pd->info->pwr_mask, on ? 0 : -1U);
 264
 265         dsb(sy);
 266
 267         if (readx_poll_timeout_atomic(rockchip_pmu_domain_is_on, pd, is_on,
 268                                       is_on == on, 0, 10000)) {
 269                 dev_err(pmu->dev,
 270                         "failed to set domain '%s', val=%d\n",
 271                         genpd->name, is_on);
 272                 return;
 273         }
 274 }
 275
 276 static int rockchip_pd_power(struct rockchip_pm_domain *pd, bool power_on)
 277 {
 278         struct rockchip_pmu *pmu = pd->pmu;
 279         int ret;
 280
 281         mutex_lock(&pmu->mutex);
 282
 283         if (rockchip_pmu_domain_is_on(pd) != power_on) {
 284                 ret = clk_bulk_enable(pd->num_clks, pd->clks);
 285                 if (ret < 0) {
 286                         dev_err(pmu->dev, "failed to enable clocks\n");
 287                         mutex_unlock(&pmu->mutex);
 288                         return ret;
 289                 }
 290
 291                 if (!power_on) {
 292                         rockchip_pmu_save_qos(pd);
 293
 294                         /* if powering down, idle request to NIU first */
 295                         rockchip_pmu_set_idle_request(pd, true);
 296                 }
 297
 298                 rockchip_do_pmu_set_power_domain(pd, power_on);
 299
 300                 if (power_on) {
 301                         /* if powering up, leave idle mode */
 302                         rockchip_pmu_set_idle_request(pd, false);
 303
 304                         rockchip_pmu_restore_qos(pd);
 305                 }
 306
 307                 clk_bulk_disable(pd->num_clks, pd->clks);
 308         }
 309
 310         mutex_unlock(&pmu->mutex);
 311         return 0;
 312 }
 313
 314 static int rockchip_pd_power_on(struct generic_pm_domain *domain)
 315 {
 316         struct rockchip_pm_domain *pd = to_rockchip_pd(domain);
 317
 318         return rockchip_pd_power(pd, true);
 319 }
 320
 321 static int rockchip_pd_power_off(struct generic_pm_domain *domain)
 322 {
 323         struct rockchip_pm_domain *pd = to_rockchip_pd(domain);
 324
 325         return rockchip_pd_power(pd, false);
 326 }
 327
 328 static int rockchip_pd_attach_dev(struct generic_pm_domain *genpd,
 329                                   struct device *dev)
 330 {
 331         struct clk *clk;
 332         int i;
 333         int error;
 334
 335         dev_dbg(dev, "attaching to power domain '%s'\n", genpd->name);
 336
 337         error = pm_clk_create(dev);
 338         if (error) {
 339                 dev_err(dev, "pm_clk_create failed %d\n", error);
 340                 return error;
 341         }
 342
 343         i = 0;
 344         while ((clk = of_clk_get(dev->of_node, i++)) && !IS_ERR(clk)) {
 345                 dev_dbg(dev, "adding clock '%pC' to list of PM clocks\n", clk);
 346                 error = pm_clk_add_clk(dev, clk);
 347                 if (error) {
 348                         dev_err(dev, "pm_clk_add_clk failed %d\n", error);
 349                         clk_put(clk);
 350                         pm_clk_destroy(dev);
 351                         return error;
 352                 }
 353         }
 354
 355         return 0;
 356 }
 357
 358 static void rockchip_pd_detach_dev(struct generic_pm_domain *genpd,
 359                                    struct device *dev)
 360 {
 361         dev_dbg(dev, "detaching from power domain '%s'\n", genpd->name);
 362
 363         pm_clk_destroy(dev);
 364 }
 365
 366 static int rockchip_pm_add_one_domain(struct rockchip_pmu *pmu,
 367                                       struct device_node *node)
 368 {
 369         const struct rockchip_domain_info *pd_info;
 370         struct rockchip_pm_domain *pd;
 371         struct device_node *qos_node;
 372         int i, j;
 373         u32 id;
 374         int error;
 375
 376         error = of_property_read_u32(node, "reg", &id);
 377         if (error) {
 378                 dev_err(pmu->dev,
 379                         "%s: failed to retrieve domain id (reg): %d\n",
 380                         node->name, error);
 381                 return -EINVAL;
 382         }
 383
 384         if (id >= pmu->info->num_domains) {
 385                 dev_err(pmu->dev, "%s: invalid domain id %d\n",
 386                         node->name, id);
 387                 return -EINVAL;
 388         }
 389
 390         pd_info = &pmu->info->domain_info[id];
 391         if (!pd_info) {
 392                 dev_err(pmu->dev, "%s: undefined domain id %d\n",
 393                         node->name, id);
 394                 return -EINVAL;
 395         }
 396
 397         pd = devm_kzalloc(pmu->dev, sizeof(*pd), GFP_KERNEL);
 398         if (!pd)
 399                 return -ENOMEM;
 400
 401         pd->info = pd_info;
 402         pd->pmu = pmu;
 403
 404         pd->num_clks = of_clk_get_parent_count(node);
 405         if (pd->num_clks > 0) {
 406                 pd->clks = devm_kcalloc(pmu->dev, pd->num_clks,
 407                                         sizeof(*pd->clks), GFP_KERNEL);
 408                 if (!pd->clks)
 409                         return -ENOMEM;
 410         } else {
 411                 dev_dbg(pmu->dev, "%s: doesn't have clocks: %d\n",
 412                         node->name, pd->num_clks);
 413                 pd->num_clks = 0;
 414         }
 415
 416         for (i = 0; i < pd->num_clks; i++) {
 417                 pd->clks[i].clk = of_clk_get(node, i);
 418                 if (IS_ERR(pd->clks[i].clk)) {
 419                         error = PTR_ERR(pd->clks[i].clk);
 420                         dev_err(pmu->dev,
 421                                 "%s: failed to get clk at index %d: %d\n",
 422                                 node->name, i, error);
 423                         return error;
 424                 }
 425         }
 426
 427         error = clk_bulk_prepare(pd->num_clks, pd->clks);
 428         if (error)
 429                 goto err_put_clocks;
 430
 431         pd->num_qos = of_count_phandle_with_args(node, "pm_qos",
 432                                                  NULL);
 433
 434         if (pd->num_qos > 0) {
 435                 pd->qos_regmap = devm_kcalloc(pmu->dev, pd->num_qos,
 436                                               sizeof(*pd->qos_regmap),
 437                                               GFP_KERNEL);
 438                 if (!pd->qos_regmap) {
 439                         error = -ENOMEM;
 440                         goto err_unprepare_clocks;
 441                 }
 442
 443                 for (j = 0; j < MAX_QOS_REGS_NUM; j++) {
 444                         pd->qos_save_regs[j] = devm_kcalloc(pmu->dev,
 445                                                             pd->num_qos,
 446                                                             sizeof(u32),
 447                                                             GFP_KERNEL);
 448                         if (!pd->qos_save_regs[j]) {
 449                                 error = -ENOMEM;
 450                                 goto err_unprepare_clocks;
 451                         }
 452                 }
 453
 454                 for (j = 0; j < pd->num_qos; j++) {
 455                         qos_node = of_parse_phandle(node, "pm_qos", j);
 456                         if (!qos_node) {
 457                                 error = -ENODEV;
 458                                 goto err_unprepare_clocks;
 459                         }
 460                         pd->qos_regmap[j] = syscon_node_to_regmap(qos_node);
 461                         if (IS_ERR(pd->qos_regmap[j])) {
 462                                 error = -ENODEV;
 463                                 of_node_put(qos_node);
 464                                 goto err_unprepare_clocks;
 465                         }
 466                         of_node_put(qos_node);
 467                 }
 468         }
 469
 470         error = rockchip_pd_power(pd, true);
 471         if (error) {
 472                 dev_err(pmu->dev,
 473                         "failed to power on domain '%s': %d\n",
 474                         node->name, error);
 475                 goto err_unprepare_clocks;
 476         }
 477
 478         pd->genpd.name = node->name;
 479         pd->genpd.power_off = rockchip_pd_power_off;
 480         pd->genpd.power_on = rockchip_pd_power_on;
 481         pd->genpd.attach_dev = rockchip_pd_attach_dev;
 482         pd->genpd.detach_dev = rockchip_pd_detach_dev;
 483         pd->genpd.flags = GENPD_FLAG_PM_CLK;
 484         if (pd_info->active_wakeup)
 485                 pd->genpd.flags |= GENPD_FLAG_ACTIVE_WAKEUP;
 486         pm_genpd_init(&pd->genpd, NULL, false);
 487
 488         pmu->genpd_data.domains[id] = &pd->genpd;
 489         return 0;
 490
 491 err_unprepare_clocks:
 492         clk_bulk_unprepare(pd->num_clks, pd->clks);
 493 err_put_clocks:
 494         clk_bulk_put(pd->num_clks, pd->clks);
 495         return error;
 496 }
 497
 498 static void rockchip_pm_remove_one_domain(struct rockchip_pm_domain *pd)
 499 {
 500         int ret;
 501
 502         /*
 503          * We're in the error cleanup already, so we only complain,
 504          * but won't emit another error on top of the original one.
 505          */
 506         ret = pm_genpd_remove(&pd->genpd);
 507         if (ret < 0)
 508                 dev_err(pd->pmu->dev, "failed to remove domain '%s' : %d - state may be inconsistent\n",
 509                         pd->genpd.name, ret);
 510
 511         clk_bulk_unprepare(pd->num_clks, pd->clks);
 512         clk_bulk_put(pd->num_clks, pd->clks);
 513
 514         /* protect the zeroing of pm->num_clks */
 515         mutex_lock(&pd->pmu->mutex);
 516         pd->num_clks = 0;
 517         mutex_unlock(&pd->pmu->mutex);
 518
 519         /* devm will free our memory */
 520 }
 521
 522 static void rockchip_pm_domain_cleanup(struct rockchip_pmu *pmu)
 523 {
 524         struct generic_pm_domain *genpd;
 525         struct rockchip_pm_domain *pd;
 526         int i;
 527
 528         for (i = 0; i < pmu->genpd_data.num_domains; i++) {
 529                 genpd = pmu->genpd_data.domains[i];
 530                 if (genpd) {
 531                         pd = to_rockchip_pd(genpd);
 532                         rockchip_pm_remove_one_domain(pd);
 533                 }
 534         }
 535
 536         /* devm will free our memory */
 537 }
 538
 539 static void rockchip_configure_pd_cnt(struct rockchip_pmu *pmu,
 540                                       u32 domain_reg_offset,
 541                                       unsigned int count)
 542 {
 543         /* First configure domain power down transition count ... */
 544         regmap_write(pmu->regmap, domain_reg_offset, count);
 545         /* ... and then power up count. */
 546         regmap_write(pmu->regmap, domain_reg_offset + 4, count);
 547 }
 548
 549 static int rockchip_pm_add_subdomain(struct rockchip_pmu *pmu,
 550                                      struct device_node *parent)
 551 {
 552         struct device_node *np;
 553         struct generic_pm_domain *child_domain, *parent_domain;
 554         int error;
 555
 556         for_each_child_of_node(parent, np) {
 557                 u32 idx;
 558
 559                 error = of_property_read_u32(parent, "reg", &idx);
 560                 if (error) {
 561                         dev_err(pmu->dev,
 562                                 "%s: failed to retrieve domain id (reg): %d\n",
 563                                 parent->name, error);
 564                         goto err_out;
 565                 }
 566                 parent_domain = pmu->genpd_data.domains[idx];
 567
 568                 error = rockchip_pm_add_one_domain(pmu, np);
 569                 if (error) {
 570                         dev_err(pmu->dev, "failed to handle node %s: %d\n",
 571                                 np->name, error);
 572                         goto err_out;
 573                 }
 574
 575                 error = of_property_read_u32(np, "reg", &idx);
 576                 if (error) {
 577                         dev_err(pmu->dev,
 578                                 "%s: failed to retrieve domain id (reg): %d\n",
 579                                 np->name, error);
 580                         goto err_out;
 581                 }
 582                 child_domain = pmu->genpd_data.domains[idx];
 583
 584                 error = pm_genpd_add_subdomain(parent_domain, child_domain);
 585                 if (error) {
 586                         dev_err(pmu->dev, "%s failed to add subdomain %s: %d\n",
 587                                 parent_domain->name, child_domain->name, error);
 588                         goto err_out;
 589                 } else {
 590                         dev_dbg(pmu->dev, "%s add subdomain: %s\n",
 591                                 parent_domain->name, child_domain->name);
 592                 }
 593
 594                 rockchip_pm_add_subdomain(pmu, np);
 595         }
 596
 597         return 0;
 598
 599 err_out:
 600         of_node_put(np);
 601         return error;
 602 }
 603
 604 static int rockchip_pm_domain_probe(struct platform_device *pdev)
 605 {
 606         struct device *dev = &pdev->dev;
 607         struct device_node *np = dev->of_node;
 608         struct device_node *node;
 609         struct device *parent;
 610         struct rockchip_pmu *pmu;
 611         const struct of_device_id *match;
 612         const struct rockchip_pmu_info *pmu_info;
 613         int error;
 614
 615         if (!np) {
 616                 dev_err(dev, "device tree node not found\n");
 617                 return -ENODEV;
 618         }
 619
 620         match = of_match_device(dev->driver->of_match_table, dev);
 621         if (!match || !match->data) {
 622                 dev_err(dev, "missing pmu data\n");
 623                 return -EINVAL;
 624         }
 625
 626         pmu_info = match->data;
 627
 628         pmu = devm_kzalloc(dev,
 629                            sizeof(*pmu) +
 630                                 pmu_info->num_domains * sizeof(pmu->domains[0]),
 631                            GFP_KERNEL);
 632         if (!pmu)
 633                 return -ENOMEM;
 634
 635         pmu->dev = &pdev->dev;
 636         mutex_init(&pmu->mutex);
 637
 638         pmu->info = pmu_info;
 639
 640         pmu->genpd_data.domains = pmu->domains;
 641         pmu->genpd_data.num_domains = pmu_info->num_domains;
 642
 643         parent = dev->parent;
 644         if (!parent) {
 645                 dev_err(dev, "no parent for syscon devices\n");
 646                 return -ENODEV;
 647         }
 648
 649         pmu->regmap = syscon_node_to_regmap(parent->of_node);
 650         if (IS_ERR(pmu->regmap)) {
 651                 dev_err(dev, "no regmap available\n");
 652                 return PTR_ERR(pmu->regmap);
 653         }
 654
 655         /*
 656          * Configure power up and down transition delays for CORE
 657          * and GPU domains.
 658          */
 659         if (pmu_info->core_power_transition_time)
 660                 rockchip_configure_pd_cnt(pmu, pmu_info->core_pwrcnt_offset,
 661                                         pmu_info->core_power_transition_time);
 662         if (pmu_info->gpu_pwrcnt_offset)
 663                 rockchip_configure_pd_cnt(pmu, pmu_info->gpu_pwrcnt_offset,
 664                                         pmu_info->gpu_power_transition_time);
 665
 666         error = -ENODEV;
 667
 668         for_each_available_child_of_node(np, node) {
 669                 error = rockchip_pm_add_one_domain(pmu, node);
 670                 if (error) {
 671                         dev_err(dev, "failed to handle node %s: %d\n",
 672                                 node->name, error);
 673                         of_node_put(node);
 674                         goto err_out;
 675                 }
 676
 677                 error = rockchip_pm_add_subdomain(pmu, node);
 678                 if (error < 0) {
 679                         dev_err(dev, "failed to handle subdomain node %s: %d\n",
 680                                 node->name, error);
 681                         of_node_put(node);
 682                         goto err_out;
 683                 }
 684         }
 685
 686         if (error) {
 687                 dev_dbg(dev, "no power domains defined\n");
 688                 goto err_out;
 689         }
 690
 691         error = of_genpd_add_provider_onecell(np, &pmu->genpd_data);
 692         if (error) {
 693                 dev_err(dev, "failed to add provider: %d\n", error);
 694                 goto err_out;
 695         }
 696
 697         return 0;
 698
 699 err_out:
 700         rockchip_pm_domain_cleanup(pmu);
 701         return error;
 702 }
 703
 704 static const struct rockchip_domain_info rk3288_pm_domains[] = {
 705         [RK3288_PD_VIO]         = DOMAIN_RK3288(7, 7, 4, false),
 706         [RK3288_PD_HEVC]        = DOMAIN_RK3288(14, 10, 9, false),
 707         [RK3288_PD_VIDEO]       = DOMAIN_RK3288(8, 8, 3, false),
 708         [RK3288_PD_GPU]         = DOMAIN_RK3288(9, 9, 2, false),
 709 };
 710
 711 static const struct rockchip_domain_info rk3328_pm_domains[] = {
 712         [RK3328_PD_CORE]        = DOMAIN_RK3328(-1, 0, 0, false),
 713         [RK3328_PD_GPU]         = DOMAIN_RK3328(-1, 1, 1, false),
 714         [RK3328_PD_BUS]         = DOMAIN_RK3328(-1, 2, 2, true),
 715         [RK3328_PD_MSCH]        = DOMAIN_RK3328(-1, 3, 3, true),
 716         [RK3328_PD_PERI]        = DOMAIN_RK3328(-1, 4, 4, true),
 717         [RK3328_PD_VIDEO]       = DOMAIN_RK3328(-1, 5, 5, false),
 718         [RK3328_PD_HEVC]        = DOMAIN_RK3328(-1, 6, 6, false),
 719         [RK3328_PD_VIO]         = DOMAIN_RK3328(-1, 8, 8, false),
 720         [RK3328_PD_VPU]         = DOMAIN_RK3328(-1, 9, 9, false),
 721 };
 722
 723 static const struct rockchip_domain_info rk3366_pm_domains[] = {
 724         [RK3366_PD_PERI]        = DOMAIN_RK3368(10, 10, 6, true),
 725         [RK3366_PD_VIO]         = DOMAIN_RK3368(14, 14, 8, false),
 726         [RK3366_PD_VIDEO]       = DOMAIN_RK3368(13, 13, 7, false),
 727         [RK3366_PD_RKVDEC]      = DOMAIN_RK3368(11, 11, 7, false),
 728         [RK3366_PD_WIFIBT]      = DOMAIN_RK3368(8, 8, 9, false),
 729         [RK3366_PD_VPU]         = DOMAIN_RK3368(12, 12, 7, false),
 730         [RK3366_PD_GPU]         = DOMAIN_RK3368(15, 15, 2, false),
 731 };
 732
 733 static const struct rockchip_domain_info rk3368_pm_domains[] = {
 734         [RK3368_PD_PERI]        = DOMAIN_RK3368(13, 12, 6, true),
 735         [RK3368_PD_VIO]         = DOMAIN_RK3368(15, 14, 8, false),
 736         [RK3368_PD_VIDEO]       = DOMAIN_RK3368(14, 13, 7, false),
 737         [RK3368_PD_GPU_0]       = DOMAIN_RK3368(16, 15, 2, false),
 738         [RK3368_PD_GPU_1]       = DOMAIN_RK3368(17, 16, 2, false),
 739 };
 740
 741 static const struct rockchip_domain_info rk3399_pm_domains[] = {
 742         [RK3399_PD_TCPD0]       = DOMAIN_RK3399(8, 8, -1, false),
 743         [RK3399_PD_TCPD1]       = DOMAIN_RK3399(9, 9, -1, false),
 744         [RK3399_PD_CCI]         = DOMAIN_RK3399(10, 10, -1, true),
 745         [RK3399_PD_CCI0]        = DOMAIN_RK3399(-1, -1, 15, true),
 746         [RK3399_PD_CCI1]        = DOMAIN_RK3399(-1, -1, 16, true),
 747         [RK3399_PD_PERILP]      = DOMAIN_RK3399(11, 11, 1, true),
 748         [RK3399_PD_PERIHP]      = DOMAIN_RK3399(12, 12, 2, true),
 749         [RK3399_PD_CENTER]      = DOMAIN_RK3399(13, 13, 14, true),
 750         [RK3399_PD_VIO]         = DOMAIN_RK3399(14, 14, 17, false),
 751         [RK3399_PD_GPU]         = DOMAIN_RK3399(15, 15, 0, false),
 752         [RK3399_PD_VCODEC]      = DOMAIN_RK3399(16, 16, 3, false),
 753         [RK3399_PD_VDU]         = DOMAIN_RK3399(17, 17, 4, false),
 754         [RK3399_PD_RGA]         = DOMAIN_RK3399(18, 18, 5, false),
 755         [RK3399_PD_IEP]         = DOMAIN_RK3399(19, 19, 6, false),
 756         [RK3399_PD_VO]          = DOMAIN_RK3399(20, 20, -1, false),
 757         [RK3399_PD_VOPB]        = DOMAIN_RK3399(-1, -1, 7, false),
 758         [RK3399_PD_VOPL]        = DOMAIN_RK3399(-1, -1, 8, false),
 759         [RK3399_PD_ISP0]        = DOMAIN_RK3399(22, 22, 9, false),
 760         [RK3399_PD_ISP1]        = DOMAIN_RK3399(23, 23, 10, false),
 761         [RK3399_PD_HDCP]        = DOMAIN_RK3399(24, 24, 11, false),
 762         [RK3399_PD_GMAC]        = DOMAIN_RK3399(25, 25, 23, true),
 763         [RK3399_PD_EMMC]        = DOMAIN_RK3399(26, 26, 24, true),
 764         [RK3399_PD_USB3]        = DOMAIN_RK3399(27, 27, 12, true),
 765         [RK3399_PD_EDP]         = DOMAIN_RK3399(28, 28, 22, false),
 766         [RK3399_PD_GIC]         = DOMAIN_RK3399(29, 29, 27, true),
 767         [RK3399_PD_SD]          = DOMAIN_RK3399(30, 30, 28, true),
 768         [RK3399_PD_SDIOAUDIO]   = DOMAIN_RK3399(31, 31, 29, true),
 769 };
 770
 771 static const struct rockchip_pmu_info rk3288_pmu = {
 772         .pwr_offset = 0x08,
 773         .status_offset = 0x0c,
 774         .req_offset = 0x10,
 775         .idle_offset = 0x14,
 776         .ack_offset = 0x14,
 777
 778         .core_pwrcnt_offset = 0x34,
 779         .gpu_pwrcnt_offset = 0x3c,
 780
 781         .core_power_transition_time = 24, /* 1us */
 782         .gpu_power_transition_time = 24, /* 1us */
 783
 784         .num_domains = ARRAY_SIZE(rk3288_pm_domains),
 785         .domain_info = rk3288_pm_domains,
 786 };
 787
 788 static const struct rockchip_pmu_info rk3328_pmu = {
 789         .req_offset = 0x414,
 790         .idle_offset = 0x484,
 791         .ack_offset = 0x484,
 792
 793         .num_domains = ARRAY_SIZE(rk3328_pm_domains),
 794         .domain_info = rk3328_pm_domains,
 795 };
 796
 797 static const struct rockchip_pmu_info rk3366_pmu = {
 798         .pwr_offset = 0x0c,
 799         .status_offset = 0x10,
 800         .req_offset = 0x3c,
 801         .idle_offset = 0x40,
 802         .ack_offset = 0x40,
 803
 804         .core_pwrcnt_offset = 0x48,
 805         .gpu_pwrcnt_offset = 0x50,
 806
 807         .core_power_transition_time = 24,
 808         .gpu_power_transition_time = 24,
 809
 810         .num_domains = ARRAY_SIZE(rk3366_pm_domains),
 811         .domain_info = rk3366_pm_domains,
 812 };
 813
 814 static const struct rockchip_pmu_info rk3368_pmu = {
 815         .pwr_offset = 0x0c,
 816         .status_offset = 0x10,
 817         .req_offset = 0x3c,
 818         .idle_offset = 0x40,
 819         .ack_offset = 0x40,
 820
 821         .core_pwrcnt_offset = 0x48,
 822         .gpu_pwrcnt_offset = 0x50,
 823
 824         .core_power_transition_time = 24,
 825         .gpu_power_transition_time = 24,
 826
 827         .num_domains = ARRAY_SIZE(rk3368_pm_domains),
 828         .domain_info = rk3368_pm_domains,
 829 };
 830
 831 static const struct rockchip_pmu_info rk3399_pmu = {
 832         .pwr_offset = 0x14,
 833         .status_offset = 0x18,
 834         .req_offset = 0x60,
 835         .idle_offset = 0x64,
 836         .ack_offset = 0x68,
 837
 838         /* ARM Trusted Firmware manages power transition times */
 839
 840         .num_domains = ARRAY_SIZE(rk3399_pm_domains),
 841         .domain_info = rk3399_pm_domains,
 842 };
 843
 844 static const struct of_device_id rockchip_pm_domain_dt_match[] = {
 845         {
 846                 .compatible = "rockchip,rk3288-power-controller",
 847                 .data = (void *)&rk3288_pmu,
 848         },
 849         {
 850                 .compatible = "rockchip,rk3328-power-controller",
 851                 .data = (void *)&rk3328_pmu,
 852         },
 853         {
 854                 .compatible = "rockchip,rk3366-power-controller",
 855                 .data = (void *)&rk3366_pmu,
 856         },
 857         {
 858                 .compatible = "rockchip,rk3368-power-controller",
 859                 .data = (void *)&rk3368_pmu,
 860         },
 861         {
 862                 .compatible = "rockchip,rk3399-power-controller",
 863                 .data = (void *)&rk3399_pmu,
 864         },
 865         { /* sentinel */ },
 866 };
 867
 868 static struct platform_driver rockchip_pm_domain_driver = {
 869         .probe = rockchip_pm_domain_probe,
 870         .driver = {
 871                 .name   = "rockchip-pm-domain",
 872                 .of_match_table = rockchip_pm_domain_dt_match,
 873                 /*
 874                  * We can't forcibly eject devices form power domain,
 875                  * so we can't really remove power domains once they
 876                  * were added.
 877                  */
 878                 .suppress_bind_attrs = true,
 879         },
 880 };
 881
 882 static int __init rockchip_pm_domain_drv_register(void)
 883 {
 884         return platform_driver_register(&rockchip_pm_domain_driver);
 885 }
 886 postcore_initcall(rockchip_pm_domain_drv_register);