drivers/clk/qcom/clk-rpm.c

   1 /*
   2  * Copyright (c) 2016, Linaro Limited
   3  * Copyright (c) 2014, The Linux Foundation. All rights reserved.
   4  *
   5  * This software is licensed under the terms of the GNU General Public
   6  * License version 2, as published by the Free Software Foundation, and
   7  * may be copied, distributed, and modified under those terms.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <linux/clk-provider.h>
  16 #include <linux/err.h>
  17 #include <linux/export.h>
  18 #include <linux/init.h>
  19 #include <linux/kernel.h>
  20 #include <linux/module.h>
  21 #include <linux/mutex.h>
  22 #include <linux/mfd/qcom_rpm.h>
  23 #include <linux/of.h>
  24 #include <linux/of_device.h>
  25 #include <linux/platform_device.h>
  26
  27 #include <dt-bindings/mfd/qcom-rpm.h>
  28 #include <dt-bindings/clock/qcom,rpmcc.h>
  29
  30 #define QCOM_RPM_MISC_CLK_TYPE                          0x306b6c63
  31 #define QCOM_RPM_SCALING_ENABLE_ID                      0x2
  32
  33 #define DEFINE_CLK_RPM(_platform, _name, _active, r_id)                       \
  34         static struct clk_rpm _platform##_##_active;                          \
  35         static struct clk_rpm _platform##_##_name = {                         \
  36                 .rpm_clk_id = (r_id),                                         \
  37                 .peer = &_platform##_##_active,                               \
  38                 .rate = INT_MAX,                                              \
  39                 .hw.init = &(struct clk_init_data){                           \
  40                         .ops = &clk_rpm_ops,                                  \
  41                         .name = #_name,                                       \
  42                         .parent_names = (const char *[]){ "pxo_board" },      \
  43                         .num_parents = 1,                                     \
  44                 },                                                            \
  45         };                                                                    \
  46         static struct clk_rpm _platform##_##_active = {                       \
  47                 .rpm_clk_id = (r_id),                                         \
  48                 .peer = &_platform##_##_name,                                 \
  49                 .active_only = true,                                          \
  50                 .rate = INT_MAX,                                              \
  51                 .hw.init = &(struct clk_init_data){                           \
  52                         .ops = &clk_rpm_ops,                                  \
  53                         .name = #_active,                                     \
  54                         .parent_names = (const char *[]){ "pxo_board" },      \
  55                         .num_parents = 1,                                     \
  56                 },                                                            \
  57         }
  58
  59 #define DEFINE_CLK_RPM_FIXED(_platform, _name, _active, r_id, r)              \
  60         static struct clk_rpm _platform##_##_name = {                         \
  61                 .rpm_clk_id = (r_id),                                         \
  62                 .rate = (r),                                                  \
  63                 .hw.init = &(struct clk_init_data){                           \
  64                         .ops = &clk_rpm_fixed_ops,                            \
  65                         .name = #_name,                                       \
  66                         .parent_names = (const char *[]){ "pxo" },            \
  67                         .num_parents = 1,                                     \
  68                 },                                                            \
  69         }
  70
  71 #define DEFINE_CLK_RPM_PXO_BRANCH(_platform, _name, _active, r_id, r)         \
  72         static struct clk_rpm _platform##_##_active;                          \
  73         static struct clk_rpm _platform##_##_name = {                         \
  74                 .rpm_clk_id = (r_id),                                         \
  75                 .active_only = true,                                          \
  76                 .peer = &_platform##_##_active,                               \
  77                 .rate = (r),                                                  \
  78                 .branch = true,                                               \
  79                 .hw.init = &(struct clk_init_data){                           \
  80                         .ops = &clk_rpm_branch_ops,                           \
  81                         .name = #_name,                                       \
  82                         .parent_names = (const char *[]){ "pxo_board" },      \
  83                         .num_parents = 1,                                     \
  84                 },                                                            \
  85         };                                                                    \
  86         static struct clk_rpm _platform##_##_active = {                       \
  87                 .rpm_clk_id = (r_id),                                         \
  88                 .peer = &_platform##_##_name,                                 \
  89                 .rate = (r),                                                  \
  90                 .branch = true,                                               \
  91                 .hw.init = &(struct clk_init_data){                           \
  92                         .ops = &clk_rpm_branch_ops,                           \
  93                         .name = #_active,                                     \
  94                         .parent_names = (const char *[]){ "pxo_board" },      \
  95                         .num_parents = 1,                                     \
  96                 },                                                            \
  97         }
  98
  99 #define DEFINE_CLK_RPM_CXO_BRANCH(_platform, _name, _active, r_id, r)         \
 100         static struct clk_rpm _platform##_##_active;                          \
 101         static struct clk_rpm _platform##_##_name = {                         \
 102                 .rpm_clk_id = (r_id),                                         \
 103                 .peer = &_platform##_##_active,                               \
 104                 .rate = (r),                                                  \
 105                 .branch = true,                                               \
 106                 .hw.init = &(struct clk_init_data){                           \
 107                         .ops = &clk_rpm_branch_ops,                           \
 108                         .name = #_name,                                       \
 109                         .parent_names = (const char *[]){ "cxo_board" },      \
 110                         .num_parents = 1,                                     \
 111                 },                                                            \
 112         };                                                                    \
 113         static struct clk_rpm _platform##_##_active = {                       \
 114                 .rpm_clk_id = (r_id),                                         \
 115                 .active_only = true,                                          \
 116                 .peer = &_platform##_##_name,                                 \
 117                 .rate = (r),                                                  \
 118                 .branch = true,                                               \
 119                 .hw.init = &(struct clk_init_data){                           \
 120                         .ops = &clk_rpm_branch_ops,                           \
 121                         .name = #_active,                                     \
 122                         .parent_names = (const char *[]){ "cxo_board" },      \
 123                         .num_parents = 1,                                     \
 124                 },                                                            \
 125         }
 126
 127 #define to_clk_rpm(_hw) container_of(_hw, struct clk_rpm, hw)
 128
 129 struct clk_rpm {
 130         const int rpm_clk_id;
 131         const bool active_only;
 132         unsigned long rate;
 133         bool enabled;
 134         bool branch;
 135         struct clk_rpm *peer;
 136         struct clk_hw hw;
 137         struct qcom_rpm *rpm;
 138 };
 139
 140 struct rpm_cc {
 141         struct qcom_rpm *rpm;
 142         struct clk_rpm **clks;
 143         size_t num_clks;
 144 };
 145
 146 struct rpm_clk_desc {
 147         struct clk_rpm **clks;
 148         size_t num_clks;
 149 };
 150
 151 static DEFINE_MUTEX(rpm_clk_lock);
 152
 153 static int clk_rpm_handoff(struct clk_rpm *r)
 154 {
 155         int ret;
 156         u32 value = INT_MAX;
 157
 158         /*
 159          * The vendor tree simply reads the status for this
 160          * RPM clock.
 161          */
 162         if (r->rpm_clk_id == QCOM_RPM_PLL_4)
 163                 return 0;
 164
 165         ret = qcom_rpm_write(r->rpm, QCOM_RPM_ACTIVE_STATE,
 166                              r->rpm_clk_id, &value, 1);
 167         if (ret)
 168                 return ret;
 169         ret = qcom_rpm_write(r->rpm, QCOM_RPM_SLEEP_STATE,
 170                              r->rpm_clk_id, &value, 1);
 171         if (ret)
 172                 return ret;
 173
 174         return 0;
 175 }
 176
 177 static int clk_rpm_set_rate_active(struct clk_rpm *r, unsigned long rate)
 178 {
 179         u32 value = DIV_ROUND_UP(rate, 1000); /* to kHz */
 180
 181         return qcom_rpm_write(r->rpm, QCOM_RPM_ACTIVE_STATE,
 182                               r->rpm_clk_id, &value, 1);
 183 }
 184
 185 static int clk_rpm_set_rate_sleep(struct clk_rpm *r, unsigned long rate)
 186 {
 187         u32 value = DIV_ROUND_UP(rate, 1000); /* to kHz */
 188
 189         return qcom_rpm_write(r->rpm, QCOM_RPM_SLEEP_STATE,
 190                               r->rpm_clk_id, &value, 1);
 191 }
 192
 193 static void to_active_sleep(struct clk_rpm *r, unsigned long rate,
 194                             unsigned long *active, unsigned long *sleep)
 195 {
 196         *active = rate;
 197
 198         /*
 199          * Active-only clocks don't care what the rate is during sleep. So,
 200          * they vote for zero.
 201          */
 202         if (r->active_only)
 203                 *sleep = 0;
 204         else
 205                 *sleep = *active;
 206 }
 207
 208 static int clk_rpm_prepare(struct clk_hw *hw)
 209 {
 210         struct clk_rpm *r = to_clk_rpm(hw);
 211         struct clk_rpm *peer = r->peer;
 212         unsigned long this_rate = 0, this_sleep_rate = 0;
 213         unsigned long peer_rate = 0, peer_sleep_rate = 0;
 214         unsigned long active_rate, sleep_rate;
 215         int ret = 0;
 216
 217         mutex_lock(&rpm_clk_lock);
 218
 219         /* Don't send requests to the RPM if the rate has not been set. */
 220         if (!r->rate)
 221                 goto out;
 222
 223         to_active_sleep(r, r->rate, &this_rate, &this_sleep_rate);
 224
 225         /* Take peer clock's rate into account only if it's enabled. */
 226         if (peer->enabled)
 227                 to_active_sleep(peer, peer->rate,
 228                                 &peer_rate, &peer_sleep_rate);
 229
 230         active_rate = max(this_rate, peer_rate);
 231
 232         if (r->branch)
 233                 active_rate = !!active_rate;
 234
 235         ret = clk_rpm_set_rate_active(r, active_rate);
 236         if (ret)
 237                 goto out;
 238
 239         sleep_rate = max(this_sleep_rate, peer_sleep_rate);
 240         if (r->branch)
 241                 sleep_rate = !!sleep_rate;
 242
 243         ret = clk_rpm_set_rate_sleep(r, sleep_rate);
 244         if (ret)
 245                 /* Undo the active set vote and restore it */
 246                 ret = clk_rpm_set_rate_active(r, peer_rate);
 247
 248 out:
 249         if (!ret)
 250                 r->enabled = true;
 251
 252         mutex_unlock(&rpm_clk_lock);
 253
 254         return ret;
 255 }
 256
 257 static void clk_rpm_unprepare(struct clk_hw *hw)
 258 {
 259         struct clk_rpm *r = to_clk_rpm(hw);
 260         struct clk_rpm *peer = r->peer;
 261         unsigned long peer_rate = 0, peer_sleep_rate = 0;
 262         unsigned long active_rate, sleep_rate;
 263         int ret;
 264
 265         mutex_lock(&rpm_clk_lock);
 266
 267         if (!r->rate)
 268                 goto out;
 269
 270         /* Take peer clock's rate into account only if it's enabled. */
 271         if (peer->enabled)
 272                 to_active_sleep(peer, peer->rate, &peer_rate,
 273                                 &peer_sleep_rate);
 274
 275         active_rate = r->branch ? !!peer_rate : peer_rate;
 276         ret = clk_rpm_set_rate_active(r, active_rate);
 277         if (ret)
 278                 goto out;
 279
 280         sleep_rate = r->branch ? !!peer_sleep_rate : peer_sleep_rate;
 281         ret = clk_rpm_set_rate_sleep(r, sleep_rate);
 282         if (ret)
 283                 goto out;
 284
 285         r->enabled = false;
 286
 287 out:
 288         mutex_unlock(&rpm_clk_lock);
 289 }
 290
 291 static int clk_rpm_fixed_prepare(struct clk_hw *hw)
 292 {
 293         struct clk_rpm *r = to_clk_rpm(hw);
 294         u32 value = 1;
 295         int ret;
 296
 297         ret = qcom_rpm_write(r->rpm, QCOM_RPM_ACTIVE_STATE,
 298                              r->rpm_clk_id, &value, 1);
 299         if (!ret)
 300                 r->enabled = true;
 301
 302         return ret;
 303 }
 304
 305 static void clk_rpm_fixed_unprepare(struct clk_hw *hw)
 306 {
 307         struct clk_rpm *r = to_clk_rpm(hw);
 308         u32 value = 0;
 309         int ret;
 310
 311         ret = qcom_rpm_write(r->rpm, QCOM_RPM_ACTIVE_STATE,
 312                              r->rpm_clk_id, &value, 1);
 313         if (!ret)
 314                 r->enabled = false;
 315 }
 316
 317 static int clk_rpm_set_rate(struct clk_hw *hw,
 318                             unsigned long rate, unsigned long parent_rate)
 319 {
 320         struct clk_rpm *r = to_clk_rpm(hw);
 321         struct clk_rpm *peer = r->peer;
 322         unsigned long active_rate, sleep_rate;
 323         unsigned long this_rate = 0, this_sleep_rate = 0;
 324         unsigned long peer_rate = 0, peer_sleep_rate = 0;
 325         int ret = 0;
 326
 327         mutex_lock(&rpm_clk_lock);
 328
 329         if (!r->enabled)
 330                 goto out;
 331
 332         to_active_sleep(r, rate, &this_rate, &this_sleep_rate);
 333
 334         /* Take peer clock's rate into account only if it's enabled. */
 335         if (peer->enabled)
 336                 to_active_sleep(peer, peer->rate,
 337                                 &peer_rate, &peer_sleep_rate);
 338
 339         active_rate = max(this_rate, peer_rate);
 340         ret = clk_rpm_set_rate_active(r, active_rate);
 341         if (ret)
 342                 goto out;
 343
 344         sleep_rate = max(this_sleep_rate, peer_sleep_rate);
 345         ret = clk_rpm_set_rate_sleep(r, sleep_rate);
 346         if (ret)
 347                 goto out;
 348
 349         r->rate = rate;
 350
 351 out:
 352         mutex_unlock(&rpm_clk_lock);
 353
 354         return ret;
 355 }
 356
 357 static long clk_rpm_round_rate(struct clk_hw *hw, unsigned long rate,
 358                                unsigned long *parent_rate)
 359 {
 360         /*
 361          * RPM handles rate rounding and we don't have a way to
 362          * know what the rate will be, so just return whatever
 363          * rate is requested.
 364          */
 365         return rate;
 366 }
 367
 368 static unsigned long clk_rpm_recalc_rate(struct clk_hw *hw,
 369                                          unsigned long parent_rate)
 370 {
 371         struct clk_rpm *r = to_clk_rpm(hw);
 372
 373         /*
 374          * RPM handles rate rounding and we don't have a way to
 375          * know what the rate will be, so just return whatever
 376          * rate was set.
 377          */
 378         return r->rate;
 379 }
 380
 381 static const struct clk_ops clk_rpm_fixed_ops = {
 382         .prepare        = clk_rpm_fixed_prepare,
 383         .unprepare      = clk_rpm_fixed_unprepare,
 384         .round_rate     = clk_rpm_round_rate,
 385         .recalc_rate    = clk_rpm_recalc_rate,
 386 };
 387
 388 static const struct clk_ops clk_rpm_ops = {
 389         .prepare        = clk_rpm_prepare,
 390         .unprepare      = clk_rpm_unprepare,
 391         .set_rate       = clk_rpm_set_rate,
 392         .round_rate     = clk_rpm_round_rate,
 393         .recalc_rate    = clk_rpm_recalc_rate,
 394 };
 395
 396 static const struct clk_ops clk_rpm_branch_ops = {
 397         .prepare        = clk_rpm_prepare,
 398         .unprepare      = clk_rpm_unprepare,
 399         .round_rate     = clk_rpm_round_rate,
 400         .recalc_rate    = clk_rpm_recalc_rate,
 401 };
 402
 403 /* MSM8660/APQ8060 */
 404 DEFINE_CLK_RPM(msm8660, afab_clk, afab_a_clk, QCOM_RPM_APPS_FABRIC_CLK);
 405 DEFINE_CLK_RPM(msm8660, sfab_clk, sfab_a_clk, QCOM_RPM_SYS_FABRIC_CLK);
 406 DEFINE_CLK_RPM(msm8660, mmfab_clk, mmfab_a_clk, QCOM_RPM_MM_FABRIC_CLK);
 407 DEFINE_CLK_RPM(msm8660, daytona_clk, daytona_a_clk, QCOM_RPM_DAYTONA_FABRIC_CLK);
 408 DEFINE_CLK_RPM(msm8660, sfpb_clk, sfpb_a_clk, QCOM_RPM_SFPB_CLK);
 409 DEFINE_CLK_RPM(msm8660, cfpb_clk, cfpb_a_clk, QCOM_RPM_CFPB_CLK);
 410 DEFINE_CLK_RPM(msm8660, mmfpb_clk, mmfpb_a_clk, QCOM_RPM_MMFPB_CLK);
 411 DEFINE_CLK_RPM(msm8660, smi_clk, smi_a_clk, QCOM_RPM_SMI_CLK);
 412 DEFINE_CLK_RPM(msm8660, ebi1_clk, ebi1_a_clk, QCOM_RPM_EBI1_CLK);
 413 DEFINE_CLK_RPM_FIXED(msm8660, pll4_clk, pll4_a_clk, QCOM_RPM_PLL_4, 540672000);
 414
 415 static struct clk_rpm *msm8660_clks[] = {
 416         [RPM_APPS_FABRIC_CLK] = &msm8660_afab_clk,
 417         [RPM_APPS_FABRIC_A_CLK] = &msm8660_afab_a_clk,
 418         [RPM_SYS_FABRIC_CLK] = &msm8660_sfab_clk,
 419         [RPM_SYS_FABRIC_A_CLK] = &msm8660_sfab_a_clk,
 420         [RPM_MM_FABRIC_CLK] = &msm8660_mmfab_clk,
 421         [RPM_MM_FABRIC_A_CLK] = &msm8660_mmfab_a_clk,
 422         [RPM_DAYTONA_FABRIC_CLK] = &msm8660_daytona_clk,
 423         [RPM_DAYTONA_FABRIC_A_CLK] = &msm8660_daytona_a_clk,
 424         [RPM_SFPB_CLK] = &msm8660_sfpb_clk,
 425         [RPM_SFPB_A_CLK] = &msm8660_sfpb_a_clk,
 426         [RPM_CFPB_CLK] = &msm8660_cfpb_clk,
 427         [RPM_CFPB_A_CLK] = &msm8660_cfpb_a_clk,
 428         [RPM_MMFPB_CLK] = &msm8660_mmfpb_clk,
 429         [RPM_MMFPB_A_CLK] = &msm8660_mmfpb_a_clk,
 430         [RPM_SMI_CLK] = &msm8660_smi_clk,
 431         [RPM_SMI_A_CLK] = &msm8660_smi_a_clk,
 432         [RPM_EBI1_CLK] = &msm8660_ebi1_clk,
 433         [RPM_EBI1_A_CLK] = &msm8660_ebi1_a_clk,
 434         [RPM_PLL4_CLK] = &msm8660_pll4_clk,
 435 };
 436
 437 static const struct rpm_clk_desc rpm_clk_msm8660 = {
 438         .clks = msm8660_clks,
 439         .num_clks = ARRAY_SIZE(msm8660_clks),
 440 };
 441
 442 /* apq8064 */
 443 DEFINE_CLK_RPM(apq8064, afab_clk, afab_a_clk, QCOM_RPM_APPS_FABRIC_CLK);
 444 DEFINE_CLK_RPM(apq8064, cfpb_clk, cfpb_a_clk, QCOM_RPM_CFPB_CLK);
 445 DEFINE_CLK_RPM(apq8064, daytona_clk, daytona_a_clk, QCOM_RPM_DAYTONA_FABRIC_CLK);
 446 DEFINE_CLK_RPM(apq8064, ebi1_clk, ebi1_a_clk, QCOM_RPM_EBI1_CLK);
 447 DEFINE_CLK_RPM(apq8064, mmfab_clk, mmfab_a_clk, QCOM_RPM_MM_FABRIC_CLK);
 448 DEFINE_CLK_RPM(apq8064, mmfpb_clk, mmfpb_a_clk, QCOM_RPM_MMFPB_CLK);
 449 DEFINE_CLK_RPM(apq8064, sfab_clk, sfab_a_clk, QCOM_RPM_SYS_FABRIC_CLK);
 450 DEFINE_CLK_RPM(apq8064, sfpb_clk, sfpb_a_clk, QCOM_RPM_SFPB_CLK);
 451 DEFINE_CLK_RPM(apq8064, qdss_clk, qdss_a_clk, QCOM_RPM_QDSS_CLK);
 452
 453 static struct clk_rpm *apq8064_clks[] = {
 454         [RPM_APPS_FABRIC_CLK] = &apq8064_afab_clk,
 455         [RPM_APPS_FABRIC_A_CLK] = &apq8064_afab_a_clk,
 456         [RPM_CFPB_CLK] = &apq8064_cfpb_clk,
 457         [RPM_CFPB_A_CLK] = &apq8064_cfpb_a_clk,
 458         [RPM_DAYTONA_FABRIC_CLK] = &apq8064_daytona_clk,
 459         [RPM_DAYTONA_FABRIC_A_CLK] = &apq8064_daytona_a_clk,
 460         [RPM_EBI1_CLK] = &apq8064_ebi1_clk,
 461         [RPM_EBI1_A_CLK] = &apq8064_ebi1_a_clk,
 462         [RPM_MM_FABRIC_CLK] = &apq8064_mmfab_clk,
 463         [RPM_MM_FABRIC_A_CLK] = &apq8064_mmfab_a_clk,
 464         [RPM_MMFPB_CLK] = &apq8064_mmfpb_clk,
 465         [RPM_MMFPB_A_CLK] = &apq8064_mmfpb_a_clk,
 466         [RPM_SYS_FABRIC_CLK] = &apq8064_sfab_clk,
 467         [RPM_SYS_FABRIC_A_CLK] = &apq8064_sfab_a_clk,
 468         [RPM_SFPB_CLK] = &apq8064_sfpb_clk,
 469         [RPM_SFPB_A_CLK] = &apq8064_sfpb_a_clk,
 470         [RPM_QDSS_CLK] = &apq8064_qdss_clk,
 471         [RPM_QDSS_A_CLK] = &apq8064_qdss_a_clk,
 472 };
 473
 474 static const struct rpm_clk_desc rpm_clk_apq8064 = {
 475         .clks = apq8064_clks,
 476         .num_clks = ARRAY_SIZE(apq8064_clks),
 477 };
 478
 479 static const struct of_device_id rpm_clk_match_table[] = {
 480         { .compatible = "qcom,rpmcc-msm8660", .data = &rpm_clk_msm8660 },
 481         { .compatible = "qcom,rpmcc-apq8060", .data = &rpm_clk_msm8660 },
 482         { .compatible = "qcom,rpmcc-apq8064", .data = &rpm_clk_apq8064 },
 483         { }
 484 };
 485 MODULE_DEVICE_TABLE(of, rpm_clk_match_table);
 486
 487 static struct clk_hw *qcom_rpm_clk_hw_get(struct of_phandle_args *clkspec,
 488                                           void *data)
 489 {
 490         struct rpm_cc *rcc = data;
 491         unsigned int idx = clkspec->args[0];
 492
 493         if (idx >= rcc->num_clks) {
 494                 pr_err("%s: invalid index %u\n", __func__, idx);
 495                 return ERR_PTR(-EINVAL);
 496         }
 497
 498         return rcc->clks[idx] ? &rcc->clks[idx]->hw : ERR_PTR(-ENOENT);
 499 }
 500
 501 static int rpm_clk_probe(struct platform_device *pdev)
 502 {
 503         struct rpm_cc *rcc;
 504         int ret;
 505         size_t num_clks, i;
 506         struct qcom_rpm *rpm;
 507         struct clk_rpm **rpm_clks;
 508         const struct rpm_clk_desc *desc;
 509
 510         rpm = dev_get_drvdata(pdev->dev.parent);
 511         if (!rpm) {
 512                 dev_err(&pdev->dev, "Unable to retrieve handle to RPM\n");
 513                 return -ENODEV;
 514         }
 515
 516         desc = of_device_get_match_data(&pdev->dev);
 517         if (!desc)
 518                 return -EINVAL;
 519
 520         rpm_clks = desc->clks;
 521         num_clks = desc->num_clks;
 522
 523         rcc = devm_kzalloc(&pdev->dev, sizeof(*rcc), GFP_KERNEL);
 524         if (!rcc)
 525                 return -ENOMEM;
 526
 527         rcc->clks = rpm_clks;
 528         rcc->num_clks = num_clks;
 529
 530         for (i = 0; i < num_clks; i++) {
 531                 if (!rpm_clks[i])
 532                         continue;
 533
 534                 rpm_clks[i]->rpm = rpm;
 535
 536                 ret = clk_rpm_handoff(rpm_clks[i]);
 537                 if (ret)
 538                         goto err;
 539         }
 540
 541         for (i = 0; i < num_clks; i++) {
 542                 if (!rpm_clks[i])
 543                         continue;
 544
 545                 ret = devm_clk_hw_register(&pdev->dev, &rpm_clks[i]->hw);
 546                 if (ret)
 547                         goto err;
 548         }
 549
 550         ret = of_clk_add_hw_provider(pdev->dev.of_node, qcom_rpm_clk_hw_get,
 551                                      rcc);
 552         if (ret)
 553                 goto err;
 554
 555         return 0;
 556 err:
 557         dev_err(&pdev->dev, "Error registering RPM Clock driver (%d)\n", ret);
 558         return ret;
 559 }
 560
 561 static int rpm_clk_remove(struct platform_device *pdev)
 562 {
 563         of_clk_del_provider(pdev->dev.of_node);
 564         return 0;
 565 }
 566
 567 static struct platform_driver rpm_clk_driver = {
 568         .driver = {
 569                 .name = "qcom-clk-rpm",
 570                 .of_match_table = rpm_clk_match_table,
 571         },
 572         .probe = rpm_clk_probe,
 573         .remove = rpm_clk_remove,
 574 };
 575
 576 static int __init rpm_clk_init(void)
 577 {
 578         return platform_driver_register(&rpm_clk_driver);
 579 }
 580 core_initcall(rpm_clk_init);
 581
 582 static void __exit rpm_clk_exit(void)
 583 {
 584         platform_driver_unregister(&rpm_clk_driver);
 585 }
 586 module_exit(rpm_clk_exit);
 587
 588 MODULE_DESCRIPTION("Qualcomm RPM Clock Controller Driver");
 589 MODULE_LICENSE("GPL v2");
 590 MODULE_ALIAS("platform:qcom-clk-rpm");