drivers/soc/qcom/rpmhpd.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright (c) 2018, The Linux Foundation. All rights reserved.*/
   3
   4 #include <linux/err.h>
   5 #include <linux/init.h>
   6 #include <linux/kernel.h>
   7 #include <linux/module.h>
   8 #include <linux/mutex.h>
   9 #include <linux/pm_domain.h>
  10 #include <linux/slab.h>
  11 #include <linux/of.h>
  12 #include <linux/of_device.h>
  13 #include <linux/platform_device.h>
  14 #include <linux/pm_opp.h>
  15 #include <soc/qcom/cmd-db.h>
  16 #include <soc/qcom/rpmh.h>
  17 #include <dt-bindings/power/qcom-rpmpd.h>
  18
  19 #define domain_to_rpmhpd(domain) container_of(domain, struct rpmhpd, pd)
  20
  21 #define RPMH_ARC_MAX_LEVELS     16
  22
  23 /**
  24  * struct rpmhpd - top level RPMh power domain resource data structure
  25  * @dev:                rpmh power domain controller device
  26  * @pd:                 generic_pm_domain corrresponding to the power domain
  27  * @parent:             generic_pm_domain corrresponding to the parent's power domain
  28  * @peer:               A peer power domain in case Active only Voting is
  29  *                      supported
  30  * @active_only:        True if it represents an Active only peer
  31  * @corner:             current corner
  32  * @active_corner:      current active corner
  33  * @enable_corner:      lowest non-zero corner
  34  * @level:              An array of level (vlvl) to corner (hlvl) mappings
  35  *                      derived from cmd-db
  36  * @level_count:        Number of levels supported by the power domain. max
  37  *                      being 16 (0 - 15)
  38  * @enabled:            true if the power domain is enabled
  39  * @res_name:           Resource name used for cmd-db lookup
  40  * @addr:               Resource address as looped up using resource name from
  41  *                      cmd-db
  42  */
  43 struct rpmhpd {
  44         struct device   *dev;
  45         struct generic_pm_domain pd;
  46         struct generic_pm_domain *parent;
  47         struct rpmhpd   *peer;
  48         const bool      active_only;
  49         unsigned int    corner;
  50         unsigned int    active_corner;
  51         unsigned int    enable_corner;
  52         u32             level[RPMH_ARC_MAX_LEVELS];
  53         size_t          level_count;
  54         bool            enabled;
  55         const char      *res_name;
  56         u32             addr;
  57 };
  58
  59 struct rpmhpd_desc {
  60         struct rpmhpd **rpmhpds;
  61         size_t num_pds;
  62 };
  63
  64 static DEFINE_MUTEX(rpmhpd_lock);
  65
  66 /* RPMH powerdomains */
  67
  68 static struct rpmhpd cx_ao;
  69 static struct rpmhpd mx;
  70 static struct rpmhpd mx_ao;
  71 static struct rpmhpd cx = {
  72         .pd = { .name = "cx", },
  73         .peer = &cx_ao,
  74         .res_name = "cx.lvl",
  75 };
  76
  77 static struct rpmhpd cx_ao = {
  78         .pd = { .name = "cx_ao", },
  79         .active_only = true,
  80         .peer = &cx,
  81         .res_name = "cx.lvl",
  82 };
  83
  84 static struct rpmhpd cx_ao_w_mx_parent;
  85 static struct rpmhpd cx_w_mx_parent = {
  86         .pd = { .name = "cx", },
  87         .peer = &cx_ao_w_mx_parent,
  88         .parent = &mx.pd,
  89         .res_name = "cx.lvl",
  90 };
  91
  92 static struct rpmhpd cx_ao_w_mx_parent = {
  93         .pd = { .name = "cx_ao", },
  94         .active_only = true,
  95         .peer = &cx_w_mx_parent,
  96         .parent = &mx_ao.pd,
  97         .res_name = "cx.lvl",
  98 };
  99
 100 static struct rpmhpd ebi = {
 101         .pd = { .name = "ebi", },
 102         .res_name = "ebi.lvl",
 103 };
 104
 105 static struct rpmhpd gfx = {
 106         .pd = { .name = "gfx", },
 107         .res_name = "gfx.lvl",
 108 };
 109
 110 static struct rpmhpd lcx = {
 111         .pd = { .name = "lcx", },
 112         .res_name = "lcx.lvl",
 113 };
 114
 115 static struct rpmhpd lmx = {
 116         .pd = { .name = "lmx", },
 117         .res_name = "lmx.lvl",
 118 };
 119
 120 static struct rpmhpd mmcx_ao;
 121 static struct rpmhpd mmcx = {
 122         .pd = { .name = "mmcx", },
 123         .peer = &mmcx_ao,
 124         .res_name = "mmcx.lvl",
 125 };
 126
 127 static struct rpmhpd mmcx_ao = {
 128         .pd = { .name = "mmcx_ao", },
 129         .active_only = true,
 130         .peer = &mmcx,
 131         .res_name = "mmcx.lvl",
 132 };
 133
 134 static struct rpmhpd mmcx_ao_w_cx_parent;
 135 static struct rpmhpd mmcx_w_cx_parent = {
 136         .pd = { .name = "mmcx", },
 137         .peer = &mmcx_ao_w_cx_parent,
 138         .parent = &cx.pd,
 139         .res_name = "mmcx.lvl",
 140 };
 141
 142 static struct rpmhpd mmcx_ao_w_cx_parent = {
 143         .pd = { .name = "mmcx_ao", },
 144         .active_only = true,
 145         .peer = &mmcx_w_cx_parent,
 146         .parent = &cx_ao.pd,
 147         .res_name = "mmcx.lvl",
 148 };
 149
 150 static struct rpmhpd mss = {
 151         .pd = { .name = "mss", },
 152         .res_name = "mss.lvl",
 153 };
 154
 155 static struct rpmhpd mx_ao;
 156 static struct rpmhpd mx = {
 157         .pd = { .name = "mx", },
 158         .peer = &mx_ao,
 159         .res_name = "mx.lvl",
 160 };
 161
 162 static struct rpmhpd mx_ao = {
 163         .pd = { .name = "mx_ao", },
 164         .active_only = true,
 165         .peer = &mx,
 166         .res_name = "mx.lvl",
 167 };
 168
 169 static struct rpmhpd mxc_ao;
 170 static struct rpmhpd mxc = {
 171         .pd = { .name = "mxc", },
 172         .peer = &mxc_ao,
 173         .res_name = "mxc.lvl",
 174 };
 175
 176 static struct rpmhpd mxc_ao = {
 177         .pd = { .name = "mxc_ao", },
 178         .active_only = true,
 179         .peer = &mxc,
 180         .res_name = "mxc.lvl",
 181 };
 182
 183 /* SDM845 RPMH powerdomains */
 184 static struct rpmhpd *sdm845_rpmhpds[] = {
 185         [SDM845_CX] = &cx_w_mx_parent,
 186         [SDM845_CX_AO] = &cx_ao_w_mx_parent,
 187         [SDM845_EBI] = &ebi,
 188         [SDM845_GFX] = &gfx,
 189         [SDM845_LCX] = &lcx,
 190         [SDM845_LMX] = &lmx,
 191         [SDM845_MSS] = &mss,
 192         [SDM845_MX] = &mx,
 193         [SDM845_MX_AO] = &mx_ao,
 194 };
 195
 196 static const struct rpmhpd_desc sdm845_desc = {
 197         .rpmhpds = sdm845_rpmhpds,
 198         .num_pds = ARRAY_SIZE(sdm845_rpmhpds),
 199 };
 200
 201 /* SDX55 RPMH powerdomains */
 202 static struct rpmhpd *sdx55_rpmhpds[] = {
 203         [SDX55_CX] = &cx_w_mx_parent,
 204         [SDX55_MSS] = &mss,
 205         [SDX55_MX] = &mx,
 206 };
 207
 208 static const struct rpmhpd_desc sdx55_desc = {
 209         .rpmhpds = sdx55_rpmhpds,
 210         .num_pds = ARRAY_SIZE(sdx55_rpmhpds),
 211 };
 212
 213 /* SM6350 RPMH powerdomains */
 214 static struct rpmhpd *sm6350_rpmhpds[] = {
 215         [SM6350_CX] = &cx_w_mx_parent,
 216         [SM6350_GFX] = &gfx,
 217         [SM6350_LCX] = &lcx,
 218         [SM6350_LMX] = &lmx,
 219         [SM6350_MSS] = &mss,
 220         [SM6350_MX] = &mx,
 221 };
 222
 223 static const struct rpmhpd_desc sm6350_desc = {
 224         .rpmhpds = sm6350_rpmhpds,
 225         .num_pds = ARRAY_SIZE(sm6350_rpmhpds),
 226 };
 227
 228 /* SM8150 RPMH powerdomains */
 229 static struct rpmhpd *sm8150_rpmhpds[] = {
 230         [SM8150_CX] = &cx_w_mx_parent,
 231         [SM8150_CX_AO] = &cx_ao_w_mx_parent,
 232         [SM8150_EBI] = &ebi,
 233         [SM8150_GFX] = &gfx,
 234         [SM8150_LCX] = &lcx,
 235         [SM8150_LMX] = &lmx,
 236         [SM8150_MMCX] = &mmcx,
 237         [SM8150_MMCX_AO] = &mmcx_ao,
 238         [SM8150_MSS] = &mss,
 239         [SM8150_MX] = &mx,
 240         [SM8150_MX_AO] = &mx_ao,
 241 };
 242
 243 static const struct rpmhpd_desc sm8150_desc = {
 244         .rpmhpds = sm8150_rpmhpds,
 245         .num_pds = ARRAY_SIZE(sm8150_rpmhpds),
 246 };
 247
 248 /* SM8250 RPMH powerdomains */
 249 static struct rpmhpd *sm8250_rpmhpds[] = {
 250         [SM8250_CX] = &cx_w_mx_parent,
 251         [SM8250_CX_AO] = &cx_ao_w_mx_parent,
 252         [SM8250_EBI] = &ebi,
 253         [SM8250_GFX] = &gfx,
 254         [SM8250_LCX] = &lcx,
 255         [SM8250_LMX] = &lmx,
 256         [SM8250_MMCX] = &mmcx,
 257         [SM8250_MMCX_AO] = &mmcx_ao,
 258         [SM8250_MX] = &mx,
 259         [SM8250_MX_AO] = &mx_ao,
 260 };
 261
 262 static const struct rpmhpd_desc sm8250_desc = {
 263         .rpmhpds = sm8250_rpmhpds,
 264         .num_pds = ARRAY_SIZE(sm8250_rpmhpds),
 265 };
 266
 267 /* SM8350 Power domains */
 268 static struct rpmhpd *sm8350_rpmhpds[] = {
 269         [SM8350_CX] = &cx_w_mx_parent,
 270         [SM8350_CX_AO] = &cx_ao_w_mx_parent,
 271         [SM8350_EBI] = &ebi,
 272         [SM8350_GFX] = &gfx,
 273         [SM8350_LCX] = &lcx,
 274         [SM8350_LMX] = &lmx,
 275         [SM8350_MMCX] = &mmcx,
 276         [SM8350_MMCX_AO] = &mmcx_ao,
 277         [SM8350_MSS] = &mss,
 278         [SM8350_MX] = &mx,
 279         [SM8350_MX_AO] = &mx_ao,
 280         [SM8350_MXC] = &mxc,
 281         [SM8350_MXC_AO] = &mxc_ao,
 282 };
 283
 284 static const struct rpmhpd_desc sm8350_desc = {
 285         .rpmhpds = sm8350_rpmhpds,
 286         .num_pds = ARRAY_SIZE(sm8350_rpmhpds),
 287 };
 288
 289 /* SM8450 RPMH powerdomains */
 290 static struct rpmhpd *sm8450_rpmhpds[] = {
 291         [SM8450_CX] = &cx,
 292         [SM8450_CX_AO] = &cx_ao,
 293         [SM8450_EBI] = &ebi,
 294         [SM8450_GFX] = &gfx,
 295         [SM8450_LCX] = &lcx,
 296         [SM8450_LMX] = &lmx,
 297         [SM8450_MMCX] = &mmcx_w_cx_parent,
 298         [SM8450_MMCX_AO] = &mmcx_ao_w_cx_parent,
 299         [SM8450_MSS] = &mss,
 300         [SM8450_MX] = &mx,
 301         [SM8450_MX_AO] = &mx_ao,
 302         [SM8450_MXC] = &mxc,
 303         [SM8450_MXC_AO] = &mxc_ao,
 304 };
 305
 306 static const struct rpmhpd_desc sm8450_desc = {
 307         .rpmhpds = sm8450_rpmhpds,
 308         .num_pds = ARRAY_SIZE(sm8450_rpmhpds),
 309 };
 310
 311 /* SC7180 RPMH powerdomains */
 312 static struct rpmhpd *sc7180_rpmhpds[] = {
 313         [SC7180_CX] = &cx_w_mx_parent,
 314         [SC7180_CX_AO] = &cx_ao_w_mx_parent,
 315         [SC7180_GFX] = &gfx,
 316         [SC7180_LCX] = &lcx,
 317         [SC7180_LMX] = &lmx,
 318         [SC7180_MSS] = &mss,
 319         [SC7180_MX] = &mx,
 320         [SC7180_MX_AO] = &mx_ao,
 321 };
 322
 323 static const struct rpmhpd_desc sc7180_desc = {
 324         .rpmhpds = sc7180_rpmhpds,
 325         .num_pds = ARRAY_SIZE(sc7180_rpmhpds),
 326 };
 327
 328 /* SC7280 RPMH powerdomains */
 329 static struct rpmhpd *sc7280_rpmhpds[] = {
 330         [SC7280_CX] = &cx,
 331         [SC7280_CX_AO] = &cx_ao,
 332         [SC7280_EBI] = &ebi,
 333         [SC7280_GFX] = &gfx,
 334         [SC7280_LCX] = &lcx,
 335         [SC7280_LMX] = &lmx,
 336         [SC7280_MSS] = &mss,
 337         [SC7280_MX] = &mx,
 338         [SC7280_MX_AO] = &mx_ao,
 339 };
 340
 341 static const struct rpmhpd_desc sc7280_desc = {
 342         .rpmhpds = sc7280_rpmhpds,
 343         .num_pds = ARRAY_SIZE(sc7280_rpmhpds),
 344 };
 345
 346 /* SC8180x RPMH powerdomains */
 347 static struct rpmhpd *sc8180x_rpmhpds[] = {
 348         [SC8180X_CX] = &cx_w_mx_parent,
 349         [SC8180X_CX_AO] = &cx_ao_w_mx_parent,
 350         [SC8180X_EBI] = &ebi,
 351         [SC8180X_GFX] = &gfx,
 352         [SC8180X_LCX] = &lcx,
 353         [SC8180X_LMX] = &lmx,
 354         [SC8180X_MMCX] = &mmcx,
 355         [SC8180X_MMCX_AO] = &mmcx_ao,
 356         [SC8180X_MSS] = &mss,
 357         [SC8180X_MX] = &mx,
 358         [SC8180X_MX_AO] = &mx_ao,
 359 };
 360
 361 static const struct rpmhpd_desc sc8180x_desc = {
 362         .rpmhpds = sc8180x_rpmhpds,
 363         .num_pds = ARRAY_SIZE(sc8180x_rpmhpds),
 364 };
 365
 366 static const struct of_device_id rpmhpd_match_table[] = {
 367         { .compatible = "qcom,sc7180-rpmhpd", .data = &sc7180_desc },
 368         { .compatible = "qcom,sc7280-rpmhpd", .data = &sc7280_desc },
 369         { .compatible = "qcom,sc8180x-rpmhpd", .data = &sc8180x_desc },
 370         { .compatible = "qcom,sdm845-rpmhpd", .data = &sdm845_desc },
 371         { .compatible = "qcom,sdx55-rpmhpd", .data = &sdx55_desc},
 372         { .compatible = "qcom,sm6350-rpmhpd", .data = &sm6350_desc },
 373         { .compatible = "qcom,sm8150-rpmhpd", .data = &sm8150_desc },
 374         { .compatible = "qcom,sm8250-rpmhpd", .data = &sm8250_desc },
 375         { .compatible = "qcom,sm8350-rpmhpd", .data = &sm8350_desc },
 376         { .compatible = "qcom,sm8450-rpmhpd", .data = &sm8450_desc },
 377         { }
 378 };
 379 MODULE_DEVICE_TABLE(of, rpmhpd_match_table);
 380
 381 static int rpmhpd_send_corner(struct rpmhpd *pd, int state,
 382                               unsigned int corner, bool sync)
 383 {
 384         struct tcs_cmd cmd = {
 385                 .addr = pd->addr,
 386                 .data = corner,
 387         };
 388
 389         /*
 390          * Wait for an ack only when we are increasing the
 391          * perf state of the power domain
 392          */
 393         if (sync)
 394                 return rpmh_write(pd->dev, state, &cmd, 1);
 395         else
 396                 return rpmh_write_async(pd->dev, state, &cmd, 1);
 397 }
 398
 399 static void to_active_sleep(struct rpmhpd *pd, unsigned int corner,
 400                             unsigned int *active, unsigned int *sleep)
 401 {
 402         *active = corner;
 403
 404         if (pd->active_only)
 405                 *sleep = 0;
 406         else
 407                 *sleep = *active;
 408 }
 409
 410 /*
 411  * This function is used to aggregate the votes across the active only
 412  * resources and its peers. The aggregated votes are sent to RPMh as
 413  * ACTIVE_ONLY votes (which take effect immediately), as WAKE_ONLY votes
 414  * (applied by RPMh on system wakeup) and as SLEEP votes (applied by RPMh
 415  * on system sleep).
 416  * We send ACTIVE_ONLY votes for resources without any peers. For others,
 417  * which have an active only peer, all 3 votes are sent.
 418  */
 419 static int rpmhpd_aggregate_corner(struct rpmhpd *pd, unsigned int corner)
 420 {
 421         int ret;
 422         struct rpmhpd *peer = pd->peer;
 423         unsigned int active_corner, sleep_corner;
 424         unsigned int this_active_corner = 0, this_sleep_corner = 0;
 425         unsigned int peer_active_corner = 0, peer_sleep_corner = 0;
 426
 427         to_active_sleep(pd, corner, &this_active_corner, &this_sleep_corner);
 428
 429         if (peer && peer->enabled)
 430                 to_active_sleep(peer, peer->corner, &peer_active_corner,
 431                                 &peer_sleep_corner);
 432
 433         active_corner = max(this_active_corner, peer_active_corner);
 434
 435         ret = rpmhpd_send_corner(pd, RPMH_ACTIVE_ONLY_STATE, active_corner,
 436                                  active_corner > pd->active_corner);
 437         if (ret)
 438                 return ret;
 439
 440         pd->active_corner = active_corner;
 441
 442         if (peer) {
 443                 peer->active_corner = active_corner;
 444
 445                 ret = rpmhpd_send_corner(pd, RPMH_WAKE_ONLY_STATE,
 446                                          active_corner, false);
 447                 if (ret)
 448                         return ret;
 449
 450                 sleep_corner = max(this_sleep_corner, peer_sleep_corner);
 451
 452                 return rpmhpd_send_corner(pd, RPMH_SLEEP_STATE, sleep_corner,
 453                                           false);
 454         }
 455
 456         return ret;
 457 }
 458
 459 static int rpmhpd_power_on(struct generic_pm_domain *domain)
 460 {
 461         struct rpmhpd *pd = domain_to_rpmhpd(domain);
 462         unsigned int corner;
 463         int ret;
 464
 465         mutex_lock(&rpmhpd_lock);
 466
 467         corner = max(pd->corner, pd->enable_corner);
 468         ret = rpmhpd_aggregate_corner(pd, corner);
 469         if (!ret)
 470                 pd->enabled = true;
 471
 472         mutex_unlock(&rpmhpd_lock);
 473
 474         return ret;
 475 }
 476
 477 static int rpmhpd_power_off(struct generic_pm_domain *domain)
 478 {
 479         struct rpmhpd *pd = domain_to_rpmhpd(domain);
 480         int ret;
 481
 482         mutex_lock(&rpmhpd_lock);
 483
 484         ret = rpmhpd_aggregate_corner(pd, 0);
 485         if (!ret)
 486                 pd->enabled = false;
 487
 488         mutex_unlock(&rpmhpd_lock);
 489
 490         return ret;
 491 }
 492
 493 static int rpmhpd_set_performance_state(struct generic_pm_domain *domain,
 494                                         unsigned int level)
 495 {
 496         struct rpmhpd *pd = domain_to_rpmhpd(domain);
 497         int ret = 0, i;
 498
 499         mutex_lock(&rpmhpd_lock);
 500
 501         for (i = 0; i < pd->level_count; i++)
 502                 if (level <= pd->level[i])
 503                         break;
 504
 505         /*
 506          * If the level requested is more than that supported by the
 507          * max corner, just set it to max anyway.
 508          */
 509         if (i == pd->level_count)
 510                 i--;
 511
 512         if (pd->enabled) {
 513                 /* Ensure that the domain isn't turn off */
 514                 if (i < pd->enable_corner)
 515                         i = pd->enable_corner;
 516
 517                 ret = rpmhpd_aggregate_corner(pd, i);
 518                 if (ret)
 519                         goto out;
 520         }
 521
 522         pd->corner = i;
 523 out:
 524         mutex_unlock(&rpmhpd_lock);
 525
 526         return ret;
 527 }
 528
 529 static unsigned int rpmhpd_get_performance_state(struct generic_pm_domain *genpd,
 530                                                  struct dev_pm_opp *opp)
 531 {
 532         return dev_pm_opp_get_level(opp);
 533 }
 534
 535 static int rpmhpd_update_level_mapping(struct rpmhpd *rpmhpd)
 536 {
 537         int i;
 538         const u16 *buf;
 539
 540         buf = cmd_db_read_aux_data(rpmhpd->res_name, &rpmhpd->level_count);
 541         if (IS_ERR(buf))
 542                 return PTR_ERR(buf);
 543
 544         /* 2 bytes used for each command DB aux data entry */
 545         rpmhpd->level_count >>= 1;
 546
 547         if (rpmhpd->level_count > RPMH_ARC_MAX_LEVELS)
 548                 return -EINVAL;
 549
 550         for (i = 0; i < rpmhpd->level_count; i++) {
 551                 rpmhpd->level[i] = buf[i];
 552
 553                 /* Remember the first corner with non-zero level */
 554                 if (!rpmhpd->level[rpmhpd->enable_corner] && rpmhpd->level[i])
 555                         rpmhpd->enable_corner = i;
 556
 557                 /*
 558                  * The AUX data may be zero padded.  These 0 valued entries at
 559                  * the end of the map must be ignored.
 560                  */
 561                 if (i > 0 && rpmhpd->level[i] == 0) {
 562                         rpmhpd->level_count = i;
 563                         break;
 564                 }
 565                 pr_debug("%s: ARC hlvl=%2d --> vlvl=%4u\n", rpmhpd->res_name, i,
 566                          rpmhpd->level[i]);
 567         }
 568
 569         return 0;
 570 }
 571
 572 static int rpmhpd_probe(struct platform_device *pdev)
 573 {
 574         int i, ret;
 575         size_t num_pds;
 576         struct device *dev = &pdev->dev;
 577         struct genpd_onecell_data *data;
 578         struct rpmhpd **rpmhpds;
 579         const struct rpmhpd_desc *desc;
 580
 581         desc = of_device_get_match_data(dev);
 582         if (!desc)
 583                 return -EINVAL;
 584
 585         rpmhpds = desc->rpmhpds;
 586         num_pds = desc->num_pds;
 587
 588         data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
 589         if (!data)
 590                 return -ENOMEM;
 591
 592         data->domains = devm_kcalloc(dev, num_pds, sizeof(*data->domains),
 593                                      GFP_KERNEL);
 594         if (!data->domains)
 595                 return -ENOMEM;
 596
 597         data->num_domains = num_pds;
 598
 599         for (i = 0; i < num_pds; i++) {
 600                 if (!rpmhpds[i]) {
 601                         dev_warn(dev, "rpmhpds[%d] is empty\n", i);
 602                         continue;
 603                 }
 604
 605                 rpmhpds[i]->dev = dev;
 606                 rpmhpds[i]->addr = cmd_db_read_addr(rpmhpds[i]->res_name);
 607                 if (!rpmhpds[i]->addr) {
 608                         dev_err(dev, "Could not find RPMh address for resource %s\n",
 609                                 rpmhpds[i]->res_name);
 610                         return -ENODEV;
 611                 }
 612
 613                 ret = cmd_db_read_slave_id(rpmhpds[i]->res_name);
 614                 if (ret != CMD_DB_HW_ARC) {
 615                         dev_err(dev, "RPMh slave ID mismatch\n");
 616                         return -EINVAL;
 617                 }
 618
 619                 ret = rpmhpd_update_level_mapping(rpmhpds[i]);
 620                 if (ret)
 621                         return ret;
 622
 623                 rpmhpds[i]->pd.power_off = rpmhpd_power_off;
 624                 rpmhpds[i]->pd.power_on = rpmhpd_power_on;
 625                 rpmhpds[i]->pd.set_performance_state = rpmhpd_set_performance_state;
 626                 rpmhpds[i]->pd.opp_to_performance_state = rpmhpd_get_performance_state;
 627                 pm_genpd_init(&rpmhpds[i]->pd, NULL, true);
 628
 629                 data->domains[i] = &rpmhpds[i]->pd;
 630         }
 631
 632         /* Add subdomains */
 633         for (i = 0; i < num_pds; i++) {
 634                 if (!rpmhpds[i])
 635                         continue;
 636                 if (rpmhpds[i]->parent)
 637                         pm_genpd_add_subdomain(rpmhpds[i]->parent,
 638                                                &rpmhpds[i]->pd);
 639         }
 640
 641         return of_genpd_add_provider_onecell(pdev->dev.of_node, data);
 642 }
 643
 644 static struct platform_driver rpmhpd_driver = {
 645         .driver = {
 646                 .name = "qcom-rpmhpd",
 647                 .of_match_table = rpmhpd_match_table,
 648                 .suppress_bind_attrs = true,
 649         },
 650         .probe = rpmhpd_probe,
 651 };
 652
 653 static int __init rpmhpd_init(void)
 654 {
 655         return platform_driver_register(&rpmhpd_driver);
 656 }
 657 core_initcall(rpmhpd_init);
 658
 659 MODULE_DESCRIPTION("Qualcomm Technologies, Inc. RPMh Power Domain Driver");
 660 MODULE_LICENSE("GPL v2");