drivers/clk/mediatek/clk-mtk.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2014 MediaTek Inc.
   4  * Author: James Liao <[email protected]>
   5  */
   6
   7 #include <linux/bitops.h>
   8 #include <linux/clk-provider.h>
   9 #include <linux/err.h>
  10 #include <linux/io.h>
  11 #include <linux/mfd/syscon.h>
  12 #include <linux/module.h>
  13 #include <linux/of.h>
  14 #include <linux/of_address.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/slab.h>
  17
  18 #include "clk-mtk.h"
  19 #include "clk-gate.h"
  20 #include "clk-mux.h"
  21
  22 const struct mtk_gate_regs cg_regs_dummy = { 0, 0, 0 };
  23 EXPORT_SYMBOL_GPL(cg_regs_dummy);
  24
  25 static int mtk_clk_dummy_enable(struct clk_hw *hw)
  26 {
  27         return 0;
  28 }
  29
  30 static void mtk_clk_dummy_disable(struct clk_hw *hw) { }
  31
  32 const struct clk_ops mtk_clk_dummy_ops = {
  33         .enable         = mtk_clk_dummy_enable,
  34         .disable        = mtk_clk_dummy_disable,
  35 };
  36 EXPORT_SYMBOL_GPL(mtk_clk_dummy_ops);
  37
  38 static void mtk_init_clk_data(struct clk_hw_onecell_data *clk_data,
  39                               unsigned int clk_num)
  40 {
  41         int i;
  42
  43         clk_data->num = clk_num;
  44
  45         for (i = 0; i < clk_num; i++)
  46                 clk_data->hws[i] = ERR_PTR(-ENOENT);
  47 }
  48
  49 struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
  50                                                     unsigned int clk_num)
  51 {
  52         struct clk_hw_onecell_data *clk_data;
  53
  54         clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, clk_num),
  55                                 GFP_KERNEL);
  56         if (!clk_data)
  57                 return NULL;
  58
  59         mtk_init_clk_data(clk_data, clk_num);
  60
  61         return clk_data;
  62 }
  63 EXPORT_SYMBOL_GPL(mtk_devm_alloc_clk_data);
  64
  65 struct clk_hw_onecell_data *mtk_alloc_clk_data(unsigned int clk_num)
  66 {
  67         struct clk_hw_onecell_data *clk_data;
  68
  69         clk_data = kzalloc(struct_size(clk_data, hws, clk_num), GFP_KERNEL);
  70         if (!clk_data)
  71                 return NULL;
  72
  73         mtk_init_clk_data(clk_data, clk_num);
  74
  75         return clk_data;
  76 }
  77 EXPORT_SYMBOL_GPL(mtk_alloc_clk_data);
  78
  79 void mtk_free_clk_data(struct clk_hw_onecell_data *clk_data)
  80 {
  81         kfree(clk_data);
  82 }
  83 EXPORT_SYMBOL_GPL(mtk_free_clk_data);
  84
  85 int mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks, int num,
  86                                 struct clk_hw_onecell_data *clk_data)
  87 {
  88         int i;
  89         struct clk_hw *hw;
  90
  91         if (!clk_data)
  92                 return -ENOMEM;
  93
  94         for (i = 0; i < num; i++) {
  95                 const struct mtk_fixed_clk *rc = &clks[i];
  96
  97                 if (!IS_ERR_OR_NULL(clk_data->hws[rc->id])) {
  98                         pr_warn("Trying to register duplicate clock ID: %d\n", rc->id);
  99                         continue;
 100                 }
 101
 102                 hw = clk_hw_register_fixed_rate(NULL, rc->name, rc->parent, 0,
 103                                               rc->rate);
 104
 105                 if (IS_ERR(hw)) {
 106                         pr_err("Failed to register clk %s: %pe\n", rc->name,
 107                                hw);
 108                         goto err;
 109                 }
 110
 111                 clk_data->hws[rc->id] = hw;
 112         }
 113
 114         return 0;
 115
 116 err:
 117         while (--i >= 0) {
 118                 const struct mtk_fixed_clk *rc = &clks[i];
 119
 120                 if (IS_ERR_OR_NULL(clk_data->hws[rc->id]))
 121                         continue;
 122
 123                 clk_hw_unregister_fixed_rate(clk_data->hws[rc->id]);
 124                 clk_data->hws[rc->id] = ERR_PTR(-ENOENT);
 125         }
 126
 127         return PTR_ERR(hw);
 128 }
 129 EXPORT_SYMBOL_GPL(mtk_clk_register_fixed_clks);
 130
 131 void mtk_clk_unregister_fixed_clks(const struct mtk_fixed_clk *clks, int num,
 132                                    struct clk_hw_onecell_data *clk_data)
 133 {
 134         int i;
 135
 136         if (!clk_data)
 137                 return;
 138
 139         for (i = num; i > 0; i--) {
 140                 const struct mtk_fixed_clk *rc = &clks[i - 1];
 141
 142                 if (IS_ERR_OR_NULL(clk_data->hws[rc->id]))
 143                         continue;
 144
 145                 clk_hw_unregister_fixed_rate(clk_data->hws[rc->id]);
 146                 clk_data->hws[rc->id] = ERR_PTR(-ENOENT);
 147         }
 148 }
 149 EXPORT_SYMBOL_GPL(mtk_clk_unregister_fixed_clks);
 150
 151 int mtk_clk_register_factors(const struct mtk_fixed_factor *clks, int num,
 152                              struct clk_hw_onecell_data *clk_data)
 153 {
 154         int i;
 155         struct clk_hw *hw;
 156
 157         if (!clk_data)
 158                 return -ENOMEM;
 159
 160         for (i = 0; i < num; i++) {
 161                 const struct mtk_fixed_factor *ff = &clks[i];
 162
 163                 if (!IS_ERR_OR_NULL(clk_data->hws[ff->id])) {
 164                         pr_warn("Trying to register duplicate clock ID: %d\n", ff->id);
 165                         continue;
 166                 }
 167
 168                 hw = clk_hw_register_fixed_factor(NULL, ff->name, ff->parent_name,
 169                                 ff->flags, ff->mult, ff->div);
 170
 171                 if (IS_ERR(hw)) {
 172                         pr_err("Failed to register clk %s: %pe\n", ff->name,
 173                                hw);
 174                         goto err;
 175                 }
 176
 177                 clk_data->hws[ff->id] = hw;
 178         }
 179
 180         return 0;
 181
 182 err:
 183         while (--i >= 0) {
 184                 const struct mtk_fixed_factor *ff = &clks[i];
 185
 186                 if (IS_ERR_OR_NULL(clk_data->hws[ff->id]))
 187                         continue;
 188
 189                 clk_hw_unregister_fixed_factor(clk_data->hws[ff->id]);
 190                 clk_data->hws[ff->id] = ERR_PTR(-ENOENT);
 191         }
 192
 193         return PTR_ERR(hw);
 194 }
 195 EXPORT_SYMBOL_GPL(mtk_clk_register_factors);
 196
 197 void mtk_clk_unregister_factors(const struct mtk_fixed_factor *clks, int num,
 198                                 struct clk_hw_onecell_data *clk_data)
 199 {
 200         int i;
 201
 202         if (!clk_data)
 203                 return;
 204
 205         for (i = num; i > 0; i--) {
 206                 const struct mtk_fixed_factor *ff = &clks[i - 1];
 207
 208                 if (IS_ERR_OR_NULL(clk_data->hws[ff->id]))
 209                         continue;
 210
 211                 clk_hw_unregister_fixed_factor(clk_data->hws[ff->id]);
 212                 clk_data->hws[ff->id] = ERR_PTR(-ENOENT);
 213         }
 214 }
 215 EXPORT_SYMBOL_GPL(mtk_clk_unregister_factors);
 216
 217 static struct clk_hw *mtk_clk_register_composite(struct device *dev,
 218                 const struct mtk_composite *mc, void __iomem *base, spinlock_t *lock)
 219 {
 220         struct clk_hw *hw;
 221         struct clk_mux *mux = NULL;
 222         struct clk_gate *gate = NULL;
 223         struct clk_divider *div = NULL;
 224         struct clk_hw *mux_hw = NULL, *gate_hw = NULL, *div_hw = NULL;
 225         const struct clk_ops *mux_ops = NULL, *gate_ops = NULL, *div_ops = NULL;
 226         const char * const *parent_names;
 227         const char *parent;
 228         int num_parents;
 229         int ret;
 230
 231         if (mc->mux_shift >= 0) {
 232                 mux = kzalloc(sizeof(*mux), GFP_KERNEL);
 233                 if (!mux)
 234                         return ERR_PTR(-ENOMEM);
 235
 236                 mux->reg = base + mc->mux_reg;
 237                 mux->mask = BIT(mc->mux_width) - 1;
 238                 mux->shift = mc->mux_shift;
 239                 mux->lock = lock;
 240                 mux->flags = mc->mux_flags;
 241                 mux_hw = &mux->hw;
 242                 mux_ops = &clk_mux_ops;
 243
 244                 parent_names = mc->parent_names;
 245                 num_parents = mc->num_parents;
 246         } else {
 247                 parent = mc->parent;
 248                 parent_names = &parent;
 249                 num_parents = 1;
 250         }
 251
 252         if (mc->gate_shift >= 0) {
 253                 gate = kzalloc(sizeof(*gate), GFP_KERNEL);
 254                 if (!gate) {
 255                         ret = -ENOMEM;
 256                         goto err_out;
 257                 }
 258
 259                 gate->reg = base + mc->gate_reg;
 260                 gate->bit_idx = mc->gate_shift;
 261                 gate->flags = CLK_GATE_SET_TO_DISABLE;
 262                 gate->lock = lock;
 263
 264                 gate_hw = &gate->hw;
 265                 gate_ops = &clk_gate_ops;
 266         }
 267
 268         if (mc->divider_shift >= 0) {
 269                 div = kzalloc(sizeof(*div), GFP_KERNEL);
 270                 if (!div) {
 271                         ret = -ENOMEM;
 272                         goto err_out;
 273                 }
 274
 275                 div->reg = base + mc->divider_reg;
 276                 div->shift = mc->divider_shift;
 277                 div->width = mc->divider_width;
 278                 div->lock = lock;
 279
 280                 div_hw = &div->hw;
 281                 div_ops = &clk_divider_ops;
 282         }
 283
 284         hw = clk_hw_register_composite(dev, mc->name, parent_names, num_parents,
 285                 mux_hw, mux_ops,
 286                 div_hw, div_ops,
 287                 gate_hw, gate_ops,
 288                 mc->flags);
 289
 290         if (IS_ERR(hw)) {
 291                 ret = PTR_ERR(hw);
 292                 goto err_out;
 293         }
 294
 295         return hw;
 296 err_out:
 297         kfree(div);
 298         kfree(gate);
 299         kfree(mux);
 300
 301         return ERR_PTR(ret);
 302 }
 303
 304 static void mtk_clk_unregister_composite(struct clk_hw *hw)
 305 {
 306         struct clk_composite *composite;
 307         struct clk_mux *mux = NULL;
 308         struct clk_gate *gate = NULL;
 309         struct clk_divider *div = NULL;
 310
 311         if (!hw)
 312                 return;
 313
 314         composite = to_clk_composite(hw);
 315         if (composite->mux_hw)
 316                 mux = to_clk_mux(composite->mux_hw);
 317         if (composite->gate_hw)
 318                 gate = to_clk_gate(composite->gate_hw);
 319         if (composite->rate_hw)
 320                 div = to_clk_divider(composite->rate_hw);
 321
 322         clk_hw_unregister_composite(hw);
 323         kfree(div);
 324         kfree(gate);
 325         kfree(mux);
 326 }
 327
 328 int mtk_clk_register_composites(struct device *dev,
 329                                 const struct mtk_composite *mcs, int num,
 330                                 void __iomem *base, spinlock_t *lock,
 331                                 struct clk_hw_onecell_data *clk_data)
 332 {
 333         struct clk_hw *hw;
 334         int i;
 335
 336         if (!clk_data)
 337                 return -ENOMEM;
 338
 339         for (i = 0; i < num; i++) {
 340                 const struct mtk_composite *mc = &mcs[i];
 341
 342                 if (!IS_ERR_OR_NULL(clk_data->hws[mc->id])) {
 343                         pr_warn("Trying to register duplicate clock ID: %d\n",
 344                                 mc->id);
 345                         continue;
 346                 }
 347
 348                 hw = mtk_clk_register_composite(dev, mc, base, lock);
 349
 350                 if (IS_ERR(hw)) {
 351                         pr_err("Failed to register clk %s: %pe\n", mc->name,
 352                                hw);
 353                         goto err;
 354                 }
 355
 356                 clk_data->hws[mc->id] = hw;
 357         }
 358
 359         return 0;
 360
 361 err:
 362         while (--i >= 0) {
 363                 const struct mtk_composite *mc = &mcs[i];
 364
 365                 if (IS_ERR_OR_NULL(clk_data->hws[mcs->id]))
 366                         continue;
 367
 368                 mtk_clk_unregister_composite(clk_data->hws[mc->id]);
 369                 clk_data->hws[mc->id] = ERR_PTR(-ENOENT);
 370         }
 371
 372         return PTR_ERR(hw);
 373 }
 374 EXPORT_SYMBOL_GPL(mtk_clk_register_composites);
 375
 376 void mtk_clk_unregister_composites(const struct mtk_composite *mcs, int num,
 377                                    struct clk_hw_onecell_data *clk_data)
 378 {
 379         int i;
 380
 381         if (!clk_data)
 382                 return;
 383
 384         for (i = num; i > 0; i--) {
 385                 const struct mtk_composite *mc = &mcs[i - 1];
 386
 387                 if (IS_ERR_OR_NULL(clk_data->hws[mc->id]))
 388                         continue;
 389
 390                 mtk_clk_unregister_composite(clk_data->hws[mc->id]);
 391                 clk_data->hws[mc->id] = ERR_PTR(-ENOENT);
 392         }
 393 }
 394 EXPORT_SYMBOL_GPL(mtk_clk_unregister_composites);
 395
 396 int mtk_clk_register_dividers(struct device *dev,
 397                               const struct mtk_clk_divider *mcds, int num,
 398                               void __iomem *base, spinlock_t *lock,
 399                               struct clk_hw_onecell_data *clk_data)
 400 {
 401         struct clk_hw *hw;
 402         int i;
 403
 404         if (!clk_data)
 405                 return -ENOMEM;
 406
 407         for (i = 0; i <  num; i++) {
 408                 const struct mtk_clk_divider *mcd = &mcds[i];
 409
 410                 if (!IS_ERR_OR_NULL(clk_data->hws[mcd->id])) {
 411                         pr_warn("Trying to register duplicate clock ID: %d\n",
 412                                 mcd->id);
 413                         continue;
 414                 }
 415
 416                 hw = clk_hw_register_divider(dev, mcd->name, mcd->parent_name,
 417                         mcd->flags, base +  mcd->div_reg, mcd->div_shift,
 418                         mcd->div_width, mcd->clk_divider_flags, lock);
 419
 420                 if (IS_ERR(hw)) {
 421                         pr_err("Failed to register clk %s: %pe\n", mcd->name,
 422                                hw);
 423                         goto err;
 424                 }
 425
 426                 clk_data->hws[mcd->id] = hw;
 427         }
 428
 429         return 0;
 430
 431 err:
 432         while (--i >= 0) {
 433                 const struct mtk_clk_divider *mcd = &mcds[i];
 434
 435                 if (IS_ERR_OR_NULL(clk_data->hws[mcd->id]))
 436                         continue;
 437
 438                 clk_hw_unregister_divider(clk_data->hws[mcd->id]);
 439                 clk_data->hws[mcd->id] = ERR_PTR(-ENOENT);
 440         }
 441
 442         return PTR_ERR(hw);
 443 }
 444 EXPORT_SYMBOL_GPL(mtk_clk_register_dividers);
 445
 446 void mtk_clk_unregister_dividers(const struct mtk_clk_divider *mcds, int num,
 447                                  struct clk_hw_onecell_data *clk_data)
 448 {
 449         int i;
 450
 451         if (!clk_data)
 452                 return;
 453
 454         for (i = num; i > 0; i--) {
 455                 const struct mtk_clk_divider *mcd = &mcds[i - 1];
 456
 457                 if (IS_ERR_OR_NULL(clk_data->hws[mcd->id]))
 458                         continue;
 459
 460                 clk_hw_unregister_divider(clk_data->hws[mcd->id]);
 461                 clk_data->hws[mcd->id] = ERR_PTR(-ENOENT);
 462         }
 463 }
 464 EXPORT_SYMBOL_GPL(mtk_clk_unregister_dividers);
 465
 466 static int __mtk_clk_simple_probe(struct platform_device *pdev,
 467                                   struct device_node *node)
 468 {
 469         const struct platform_device_id *id;
 470         const struct mtk_clk_desc *mcd;
 471         struct clk_hw_onecell_data *clk_data;
 472         void __iomem *base = NULL;
 473         int num_clks, r;
 474
 475         mcd = device_get_match_data(&pdev->dev);
 476         if (!mcd) {
 477                 /* Clock driver wasn't registered from devicetree */
 478                 id = platform_get_device_id(pdev);
 479                 if (id)
 480                         mcd = (const struct mtk_clk_desc *)id->driver_data;
 481
 482                 if (!mcd)
 483                         return -EINVAL;
 484         }
 485
 486         /* Composite and divider clocks needs us to pass iomem pointer */
 487         if (mcd->composite_clks || mcd->divider_clks) {
 488                 if (!mcd->shared_io)
 489                         base = devm_platform_ioremap_resource(pdev, 0);
 490                 else
 491                         base = of_iomap(node, 0);
 492
 493                 if (IS_ERR_OR_NULL(base))
 494                         return IS_ERR(base) ? PTR_ERR(base) : -ENOMEM;
 495         }
 496
 497         /* Calculate how many clk_hw_onecell_data entries to allocate */
 498         num_clks = mcd->num_clks + mcd->num_composite_clks;
 499         num_clks += mcd->num_fixed_clks + mcd->num_factor_clks;
 500         num_clks += mcd->num_mux_clks + mcd->num_divider_clks;
 501
 502         clk_data = mtk_alloc_clk_data(num_clks);
 503         if (!clk_data) {
 504                 r = -ENOMEM;
 505                 goto free_base;
 506         }
 507
 508         if (mcd->fixed_clks) {
 509                 r = mtk_clk_register_fixed_clks(mcd->fixed_clks,
 510                                                 mcd->num_fixed_clks, clk_data);
 511                 if (r)
 512                         goto free_data;
 513         }
 514
 515         if (mcd->factor_clks) {
 516                 r = mtk_clk_register_factors(mcd->factor_clks,
 517                                              mcd->num_factor_clks, clk_data);
 518                 if (r)
 519                         goto unregister_fixed_clks;
 520         }
 521
 522         if (mcd->mux_clks) {
 523                 r = mtk_clk_register_muxes(&pdev->dev, mcd->mux_clks,
 524                                            mcd->num_mux_clks, node,
 525                                            mcd->clk_lock, clk_data);
 526                 if (r)
 527                         goto unregister_factors;
 528         }
 529
 530         if (mcd->composite_clks) {
 531                 /* We don't check composite_lock because it's optional */
 532                 r = mtk_clk_register_composites(&pdev->dev,
 533                                                 mcd->composite_clks,
 534                                                 mcd->num_composite_clks,
 535                                                 base, mcd->clk_lock, clk_data);
 536                 if (r)
 537                         goto unregister_muxes;
 538         }
 539
 540         if (mcd->divider_clks) {
 541                 r = mtk_clk_register_dividers(&pdev->dev,
 542                                               mcd->divider_clks,
 543                                               mcd->num_divider_clks,
 544                                               base, mcd->clk_lock, clk_data);
 545                 if (r)
 546                         goto unregister_composites;
 547         }
 548
 549         if (mcd->clks) {
 550                 r = mtk_clk_register_gates(&pdev->dev, node, mcd->clks,
 551                                            mcd->num_clks, clk_data);
 552                 if (r)
 553                         goto unregister_dividers;
 554         }
 555
 556         if (mcd->clk_notifier_func) {
 557                 struct clk *mfg_mux = clk_data->hws[mcd->mfg_clk_idx]->clk;
 558
 559                 r = mcd->clk_notifier_func(&pdev->dev, mfg_mux);
 560                 if (r)
 561                         goto unregister_clks;
 562         }
 563
 564         r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
 565         if (r)
 566                 goto unregister_clks;
 567
 568         platform_set_drvdata(pdev, clk_data);
 569
 570         if (mcd->rst_desc) {
 571                 r = mtk_register_reset_controller_with_dev(&pdev->dev,
 572                                                            mcd->rst_desc);
 573                 if (r)
 574                         goto unregister_clks;
 575         }
 576
 577         return r;
 578
 579 unregister_clks:
 580         if (mcd->clks)
 581                 mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
 582 unregister_dividers:
 583         if (mcd->divider_clks)
 584                 mtk_clk_unregister_dividers(mcd->divider_clks,
 585                                             mcd->num_divider_clks, clk_data);
 586 unregister_composites:
 587         if (mcd->composite_clks)
 588                 mtk_clk_unregister_composites(mcd->composite_clks,
 589                                               mcd->num_composite_clks, clk_data);
 590 unregister_muxes:
 591         if (mcd->mux_clks)
 592                 mtk_clk_unregister_muxes(mcd->mux_clks,
 593                                          mcd->num_mux_clks, clk_data);
 594 unregister_factors:
 595         if (mcd->factor_clks)
 596                 mtk_clk_unregister_factors(mcd->factor_clks,
 597                                            mcd->num_factor_clks, clk_data);
 598 unregister_fixed_clks:
 599         if (mcd->fixed_clks)
 600                 mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
 601                                               mcd->num_fixed_clks, clk_data);
 602 free_data:
 603         mtk_free_clk_data(clk_data);
 604 free_base:
 605         if (mcd->shared_io && base)
 606                 iounmap(base);
 607         return r;
 608 }
 609
 610 static void __mtk_clk_simple_remove(struct platform_device *pdev,
 611                                    struct device_node *node)
 612 {
 613         struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);
 614         const struct mtk_clk_desc *mcd = device_get_match_data(&pdev->dev);
 615
 616         of_clk_del_provider(node);
 617         if (mcd->clks)
 618                 mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
 619         if (mcd->divider_clks)
 620                 mtk_clk_unregister_dividers(mcd->divider_clks,
 621                                             mcd->num_divider_clks, clk_data);
 622         if (mcd->composite_clks)
 623                 mtk_clk_unregister_composites(mcd->composite_clks,
 624                                               mcd->num_composite_clks, clk_data);
 625         if (mcd->mux_clks)
 626                 mtk_clk_unregister_muxes(mcd->mux_clks,
 627                                          mcd->num_mux_clks, clk_data);
 628         if (mcd->factor_clks)
 629                 mtk_clk_unregister_factors(mcd->factor_clks,
 630                                            mcd->num_factor_clks, clk_data);
 631         if (mcd->fixed_clks)
 632                 mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
 633                                               mcd->num_fixed_clks, clk_data);
 634         mtk_free_clk_data(clk_data);
 635 }
 636
 637 int mtk_clk_pdev_probe(struct platform_device *pdev)
 638 {
 639         struct device *dev = &pdev->dev;
 640         struct device_node *node = dev->parent->of_node;
 641
 642         return __mtk_clk_simple_probe(pdev, node);
 643 }
 644 EXPORT_SYMBOL_GPL(mtk_clk_pdev_probe);
 645
 646 int mtk_clk_simple_probe(struct platform_device *pdev)
 647 {
 648         struct device_node *node = pdev->dev.of_node;
 649
 650         return __mtk_clk_simple_probe(pdev, node);
 651 }
 652 EXPORT_SYMBOL_GPL(mtk_clk_simple_probe);
 653
 654 void mtk_clk_pdev_remove(struct platform_device *pdev)
 655 {
 656         struct device *dev = &pdev->dev;
 657         struct device_node *node = dev->parent->of_node;
 658
 659         __mtk_clk_simple_remove(pdev, node);
 660 }
 661 EXPORT_SYMBOL_GPL(mtk_clk_pdev_remove);
 662
 663 void mtk_clk_simple_remove(struct platform_device *pdev)
 664 {
 665         __mtk_clk_simple_remove(pdev, pdev->dev.of_node);
 666 }
 667 EXPORT_SYMBOL_GPL(mtk_clk_simple_remove);
 668
 669 MODULE_LICENSE("GPL");