xref: /openbmc/linux/drivers/clk/mediatek/clk-mtk.c (revision feeeeb4c) 
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * Copyright (c) 2014 MediaTek Inc.
4  * Author: James Liao <jamesjj.liao@mediatek.com>
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/pm_runtime.h>
17 #include <linux/slab.h>
18 
19 #include "clk-mtk.h"
20 #include "clk-gate.h"
21 #include "clk-mux.h"
22 
23 const struct mtk_gate_regs cg_regs_dummy = { 0, 0, 0 };
24 EXPORT_SYMBOL_GPL(cg_regs_dummy);
25 
26 static int mtk_clk_dummy_enable(struct clk_hw *hw)
27 {
28 	return 0;
29 }
30 
31 static void mtk_clk_dummy_disable(struct clk_hw *hw) { }
32 
33 const struct clk_ops mtk_clk_dummy_ops = {
34 	.enable		= mtk_clk_dummy_enable,
35 	.disable	= mtk_clk_dummy_disable,
36 };
37 EXPORT_SYMBOL_GPL(mtk_clk_dummy_ops);
38 
39 static void mtk_init_clk_data(struct clk_hw_onecell_data *clk_data,
40 			      unsigned int clk_num)
41 {
42 	int i;
43 
44 	clk_data->num = clk_num;
45 
46 	for (i = 0; i < clk_num; i++)
47 		clk_data->hws[i] = ERR_PTR(-ENOENT);
48 }
49 
50 struct clk_hw_onecell_data *mtk_devm_alloc_clk_data(struct device *dev,
51 						    unsigned int clk_num)
52 {
53 	struct clk_hw_onecell_data *clk_data;
54 
55 	clk_data = devm_kzalloc(dev, struct_size(clk_data, hws, clk_num),
56 				GFP_KERNEL);
57 	if (!clk_data)
58 		return NULL;
59 
60 	mtk_init_clk_data(clk_data, clk_num);
61 
62 	return clk_data;
63 }
64 EXPORT_SYMBOL_GPL(mtk_devm_alloc_clk_data);
65 
66 struct clk_hw_onecell_data *mtk_alloc_clk_data(unsigned int clk_num)
67 {
68 	struct clk_hw_onecell_data *clk_data;
69 
70 	clk_data = kzalloc(struct_size(clk_data, hws, clk_num), GFP_KERNEL);
71 	if (!clk_data)
72 		return NULL;
73 
74 	mtk_init_clk_data(clk_data, clk_num);
75 
76 	return clk_data;
77 }
78 EXPORT_SYMBOL_GPL(mtk_alloc_clk_data);
79 
80 void mtk_free_clk_data(struct clk_hw_onecell_data *clk_data)
81 {
82 	kfree(clk_data);
83 }
84 EXPORT_SYMBOL_GPL(mtk_free_clk_data);
85 
86 int mtk_clk_register_fixed_clks(const struct mtk_fixed_clk *clks, int num,
87 				struct clk_hw_onecell_data *clk_data)
88 {
89 	int i;
90 	struct clk_hw *hw;
91 
92 	if (!clk_data)
93 		return -ENOMEM;
94 
95 	for (i = 0; i < num; i++) {
96 		const struct mtk_fixed_clk *rc = &clks[i];
97 
98 		if (!IS_ERR_OR_NULL(clk_data->hws[rc->id])) {
99 			pr_warn("Trying to register duplicate clock ID: %d\n", rc->id);
100 			continue;
101 		}
102 
103 		hw = clk_hw_register_fixed_rate(NULL, rc->name, rc->parent, 0,
104 					      rc->rate);
105 
106 		if (IS_ERR(hw)) {
107 			pr_err("Failed to register clk %s: %pe\n", rc->name,
108 			       hw);
109 			goto err;
110 		}
111 
112 		clk_data->hws[rc->id] = hw;
113 	}
114 
115 	return 0;
116 
117 err:
118 	while (--i >= 0) {
119 		const struct mtk_fixed_clk *rc = &clks[i];
120 
121 		if (IS_ERR_OR_NULL(clk_data->hws[rc->id]))
122 			continue;
123 
124 		clk_hw_unregister_fixed_rate(clk_data->hws[rc->id]);
125 		clk_data->hws[rc->id] = ERR_PTR(-ENOENT);
126 	}
127 
128 	return PTR_ERR(hw);
129 }
130 EXPORT_SYMBOL_GPL(mtk_clk_register_fixed_clks);
131 
132 void mtk_clk_unregister_fixed_clks(const struct mtk_fixed_clk *clks, int num,
133 				   struct clk_hw_onecell_data *clk_data)
134 {
135 	int i;
136 
137 	if (!clk_data)
138 		return;
139 
140 	for (i = num; i > 0; i--) {
141 		const struct mtk_fixed_clk *rc = &clks[i - 1];
142 
143 		if (IS_ERR_OR_NULL(clk_data->hws[rc->id]))
144 			continue;
145 
146 		clk_hw_unregister_fixed_rate(clk_data->hws[rc->id]);
147 		clk_data->hws[rc->id] = ERR_PTR(-ENOENT);
148 	}
149 }
150 EXPORT_SYMBOL_GPL(mtk_clk_unregister_fixed_clks);
151 
152 int mtk_clk_register_factors(const struct mtk_fixed_factor *clks, int num,
153 			     struct clk_hw_onecell_data *clk_data)
154 {
155 	int i;
156 	struct clk_hw *hw;
157 
158 	if (!clk_data)
159 		return -ENOMEM;
160 
161 	for (i = 0; i < num; i++) {
162 		const struct mtk_fixed_factor *ff = &clks[i];
163 
164 		if (!IS_ERR_OR_NULL(clk_data->hws[ff->id])) {
165 			pr_warn("Trying to register duplicate clock ID: %d\n", ff->id);
166 			continue;
167 		}
168 
169 		hw = clk_hw_register_fixed_factor(NULL, ff->name, ff->parent_name,
170 				ff->flags, ff->mult, ff->div);
171 
172 		if (IS_ERR(hw)) {
173 			pr_err("Failed to register clk %s: %pe\n", ff->name,
174 			       hw);
175 			goto err;
176 		}
177 
178 		clk_data->hws[ff->id] = hw;
179 	}
180 
181 	return 0;
182 
183 err:
184 	while (--i >= 0) {
185 		const struct mtk_fixed_factor *ff = &clks[i];
186 
187 		if (IS_ERR_OR_NULL(clk_data->hws[ff->id]))
188 			continue;
189 
190 		clk_hw_unregister_fixed_factor(clk_data->hws[ff->id]);
191 		clk_data->hws[ff->id] = ERR_PTR(-ENOENT);
192 	}
193 
194 	return PTR_ERR(hw);
195 }
196 EXPORT_SYMBOL_GPL(mtk_clk_register_factors);
197 
198 void mtk_clk_unregister_factors(const struct mtk_fixed_factor *clks, int num,
199 				struct clk_hw_onecell_data *clk_data)
200 {
201 	int i;
202 
203 	if (!clk_data)
204 		return;
205 
206 	for (i = num; i > 0; i--) {
207 		const struct mtk_fixed_factor *ff = &clks[i - 1];
208 
209 		if (IS_ERR_OR_NULL(clk_data->hws[ff->id]))
210 			continue;
211 
212 		clk_hw_unregister_fixed_factor(clk_data->hws[ff->id]);
213 		clk_data->hws[ff->id] = ERR_PTR(-ENOENT);
214 	}
215 }
216 EXPORT_SYMBOL_GPL(mtk_clk_unregister_factors);
217 
218 static struct clk_hw *mtk_clk_register_composite(struct device *dev,
219 		const struct mtk_composite *mc, void __iomem *base, spinlock_t *lock)
220 {
221 	struct clk_hw *hw;
222 	struct clk_mux *mux = NULL;
223 	struct clk_gate *gate = NULL;
224 	struct clk_divider *div = NULL;
225 	struct clk_hw *mux_hw = NULL, *gate_hw = NULL, *div_hw = NULL;
226 	const struct clk_ops *mux_ops = NULL, *gate_ops = NULL, *div_ops = NULL;
227 	const char * const *parent_names;
228 	const char *parent;
229 	int num_parents;
230 	int ret;
231 
232 	if (mc->mux_shift >= 0) {
233 		mux = kzalloc(sizeof(*mux), GFP_KERNEL);
234 		if (!mux)
235 			return ERR_PTR(-ENOMEM);
236 
237 		mux->reg = base + mc->mux_reg;
238 		mux->mask = BIT(mc->mux_width) - 1;
239 		mux->shift = mc->mux_shift;
240 		mux->lock = lock;
241 		mux->flags = mc->mux_flags;
242 		mux_hw = &mux->hw;
243 		mux_ops = &clk_mux_ops;
244 
245 		parent_names = mc->parent_names;
246 		num_parents = mc->num_parents;
247 	} else {
248 		parent = mc->parent;
249 		parent_names = &parent;
250 		num_parents = 1;
251 	}
252 
253 	if (mc->gate_shift >= 0) {
254 		gate = kzalloc(sizeof(*gate), GFP_KERNEL);
255 		if (!gate) {
256 			ret = -ENOMEM;
257 			goto err_out;
258 		}
259 
260 		gate->reg = base + mc->gate_reg;
261 		gate->bit_idx = mc->gate_shift;
262 		gate->flags = CLK_GATE_SET_TO_DISABLE;
263 		gate->lock = lock;
264 
265 		gate_hw = &gate->hw;
266 		gate_ops = &clk_gate_ops;
267 	}
268 
269 	if (mc->divider_shift >= 0) {
270 		div = kzalloc(sizeof(*div), GFP_KERNEL);
271 		if (!div) {
272 			ret = -ENOMEM;
273 			goto err_out;
274 		}
275 
276 		div->reg = base + mc->divider_reg;
277 		div->shift = mc->divider_shift;
278 		div->width = mc->divider_width;
279 		div->lock = lock;
280 
281 		div_hw = &div->hw;
282 		div_ops = &clk_divider_ops;
283 	}
284 
285 	hw = clk_hw_register_composite(dev, mc->name, parent_names, num_parents,
286 		mux_hw, mux_ops,
287 		div_hw, div_ops,
288 		gate_hw, gate_ops,
289 		mc->flags);
290 
291 	if (IS_ERR(hw)) {
292 		ret = PTR_ERR(hw);
293 		goto err_out;
294 	}
295 
296 	return hw;
297 err_out:
298 	kfree(div);
299 	kfree(gate);
300 	kfree(mux);
301 
302 	return ERR_PTR(ret);
303 }
304 
305 static void mtk_clk_unregister_composite(struct clk_hw *hw)
306 {
307 	struct clk_composite *composite;
308 	struct clk_mux *mux = NULL;
309 	struct clk_gate *gate = NULL;
310 	struct clk_divider *div = NULL;
311 
312 	if (!hw)
313 		return;
314 
315 	composite = to_clk_composite(hw);
316 	if (composite->mux_hw)
317 		mux = to_clk_mux(composite->mux_hw);
318 	if (composite->gate_hw)
319 		gate = to_clk_gate(composite->gate_hw);
320 	if (composite->rate_hw)
321 		div = to_clk_divider(composite->rate_hw);
322 
323 	clk_hw_unregister_composite(hw);
324 	kfree(div);
325 	kfree(gate);
326 	kfree(mux);
327 }
328 
329 int mtk_clk_register_composites(struct device *dev,
330 				const struct mtk_composite *mcs, int num,
331 				void __iomem *base, spinlock_t *lock,
332 				struct clk_hw_onecell_data *clk_data)
333 {
334 	struct clk_hw *hw;
335 	int i;
336 
337 	if (!clk_data)
338 		return -ENOMEM;
339 
340 	for (i = 0; i < num; i++) {
341 		const struct mtk_composite *mc = &mcs[i];
342 
343 		if (!IS_ERR_OR_NULL(clk_data->hws[mc->id])) {
344 			pr_warn("Trying to register duplicate clock ID: %d\n",
345 				mc->id);
346 			continue;
347 		}
348 
349 		hw = mtk_clk_register_composite(dev, mc, base, lock);
350 
351 		if (IS_ERR(hw)) {
352 			pr_err("Failed to register clk %s: %pe\n", mc->name,
353 			       hw);
354 			goto err;
355 		}
356 
357 		clk_data->hws[mc->id] = hw;
358 	}
359 
360 	return 0;
361 
362 err:
363 	while (--i >= 0) {
364 		const struct mtk_composite *mc = &mcs[i];
365 
366 		if (IS_ERR_OR_NULL(clk_data->hws[mcs->id]))
367 			continue;
368 
369 		mtk_clk_unregister_composite(clk_data->hws[mc->id]);
370 		clk_data->hws[mc->id] = ERR_PTR(-ENOENT);
371 	}
372 
373 	return PTR_ERR(hw);
374 }
375 EXPORT_SYMBOL_GPL(mtk_clk_register_composites);
376 
377 void mtk_clk_unregister_composites(const struct mtk_composite *mcs, int num,
378 				   struct clk_hw_onecell_data *clk_data)
379 {
380 	int i;
381 
382 	if (!clk_data)
383 		return;
384 
385 	for (i = num; i > 0; i--) {
386 		const struct mtk_composite *mc = &mcs[i - 1];
387 
388 		if (IS_ERR_OR_NULL(clk_data->hws[mc->id]))
389 			continue;
390 
391 		mtk_clk_unregister_composite(clk_data->hws[mc->id]);
392 		clk_data->hws[mc->id] = ERR_PTR(-ENOENT);
393 	}
394 }
395 EXPORT_SYMBOL_GPL(mtk_clk_unregister_composites);
396 
397 int mtk_clk_register_dividers(struct device *dev,
398 			      const struct mtk_clk_divider *mcds, int num,
399 			      void __iomem *base, spinlock_t *lock,
400 			      struct clk_hw_onecell_data *clk_data)
401 {
402 	struct clk_hw *hw;
403 	int i;
404 
405 	if (!clk_data)
406 		return -ENOMEM;
407 
408 	for (i = 0; i <  num; i++) {
409 		const struct mtk_clk_divider *mcd = &mcds[i];
410 
411 		if (!IS_ERR_OR_NULL(clk_data->hws[mcd->id])) {
412 			pr_warn("Trying to register duplicate clock ID: %d\n",
413 				mcd->id);
414 			continue;
415 		}
416 
417 		hw = clk_hw_register_divider(dev, mcd->name, mcd->parent_name,
418 			mcd->flags, base +  mcd->div_reg, mcd->div_shift,
419 			mcd->div_width, mcd->clk_divider_flags, lock);
420 
421 		if (IS_ERR(hw)) {
422 			pr_err("Failed to register clk %s: %pe\n", mcd->name,
423 			       hw);
424 			goto err;
425 		}
426 
427 		clk_data->hws[mcd->id] = hw;
428 	}
429 
430 	return 0;
431 
432 err:
433 	while (--i >= 0) {
434 		const struct mtk_clk_divider *mcd = &mcds[i];
435 
436 		if (IS_ERR_OR_NULL(clk_data->hws[mcd->id]))
437 			continue;
438 
439 		clk_hw_unregister_divider(clk_data->hws[mcd->id]);
440 		clk_data->hws[mcd->id] = ERR_PTR(-ENOENT);
441 	}
442 
443 	return PTR_ERR(hw);
444 }
445 EXPORT_SYMBOL_GPL(mtk_clk_register_dividers);
446 
447 void mtk_clk_unregister_dividers(const struct mtk_clk_divider *mcds, int num,
448 				 struct clk_hw_onecell_data *clk_data)
449 {
450 	int i;
451 
452 	if (!clk_data)
453 		return;
454 
455 	for (i = num; i > 0; i--) {
456 		const struct mtk_clk_divider *mcd = &mcds[i - 1];
457 
458 		if (IS_ERR_OR_NULL(clk_data->hws[mcd->id]))
459 			continue;
460 
461 		clk_hw_unregister_divider(clk_data->hws[mcd->id]);
462 		clk_data->hws[mcd->id] = ERR_PTR(-ENOENT);
463 	}
464 }
465 EXPORT_SYMBOL_GPL(mtk_clk_unregister_dividers);
466 
467 static int __mtk_clk_simple_probe(struct platform_device *pdev,
468 				  struct device_node *node)
469 {
470 	const struct platform_device_id *id;
471 	const struct mtk_clk_desc *mcd;
472 	struct clk_hw_onecell_data *clk_data;
473 	void __iomem *base = NULL;
474 	int num_clks, r;
475 
476 	mcd = device_get_match_data(&pdev->dev);
477 	if (!mcd) {
478 		/* Clock driver wasn't registered from devicetree */
479 		id = platform_get_device_id(pdev);
480 		if (id)
481 			mcd = (const struct mtk_clk_desc *)id->driver_data;
482 
483 		if (!mcd)
484 			return -EINVAL;
485 	}
486 
487 	/* Composite and divider clocks needs us to pass iomem pointer */
488 	if (mcd->composite_clks || mcd->divider_clks) {
489 		if (!mcd->shared_io)
490 			base = devm_platform_ioremap_resource(pdev, 0);
491 		else
492 			base = of_iomap(node, 0);
493 
494 		if (IS_ERR_OR_NULL(base))
495 			return IS_ERR(base) ? PTR_ERR(base) : -ENOMEM;
496 	}
497 
498 
499 	if (mcd->need_runtime_pm) {
500 		devm_pm_runtime_enable(&pdev->dev);
501 		/*
502 		 * Do a pm_runtime_resume_and_get() to workaround a possible
503 		 * deadlock between clk_register() and the genpd framework.
504 		 */
505 		r = pm_runtime_resume_and_get(&pdev->dev);
506 		if (r)
507 			return r;
508 	}
509 
510 	/* Calculate how many clk_hw_onecell_data entries to allocate */
511 	num_clks = mcd->num_clks + mcd->num_composite_clks;
512 	num_clks += mcd->num_fixed_clks + mcd->num_factor_clks;
513 	num_clks += mcd->num_mux_clks + mcd->num_divider_clks;
514 
515 	clk_data = mtk_alloc_clk_data(num_clks);
516 	if (!clk_data) {
517 		r = -ENOMEM;
518 		goto free_base;
519 	}
520 
521 	if (mcd->fixed_clks) {
522 		r = mtk_clk_register_fixed_clks(mcd->fixed_clks,
523 						mcd->num_fixed_clks, clk_data);
524 		if (r)
525 			goto free_data;
526 	}
527 
528 	if (mcd->factor_clks) {
529 		r = mtk_clk_register_factors(mcd->factor_clks,
530 					     mcd->num_factor_clks, clk_data);
531 		if (r)
532 			goto unregister_fixed_clks;
533 	}
534 
535 	if (mcd->mux_clks) {
536 		r = mtk_clk_register_muxes(&pdev->dev, mcd->mux_clks,
537 					   mcd->num_mux_clks, node,
538 					   mcd->clk_lock, clk_data);
539 		if (r)
540 			goto unregister_factors;
541 	}
542 
543 	if (mcd->composite_clks) {
544 		/* We don't check composite_lock because it's optional */
545 		r = mtk_clk_register_composites(&pdev->dev,
546 						mcd->composite_clks,
547 						mcd->num_composite_clks,
548 						base, mcd->clk_lock, clk_data);
549 		if (r)
550 			goto unregister_muxes;
551 	}
552 
553 	if (mcd->divider_clks) {
554 		r = mtk_clk_register_dividers(&pdev->dev,
555 					      mcd->divider_clks,
556 					      mcd->num_divider_clks,
557 					      base, mcd->clk_lock, clk_data);
558 		if (r)
559 			goto unregister_composites;
560 	}
561 
562 	if (mcd->clks) {
563 		r = mtk_clk_register_gates(&pdev->dev, node, mcd->clks,
564 					   mcd->num_clks, clk_data);
565 		if (r)
566 			goto unregister_dividers;
567 	}
568 
569 	if (mcd->clk_notifier_func) {
570 		struct clk *mfg_mux = clk_data->hws[mcd->mfg_clk_idx]->clk;
571 
572 		r = mcd->clk_notifier_func(&pdev->dev, mfg_mux);
573 		if (r)
574 			goto unregister_clks;
575 	}
576 
577 	r = of_clk_add_hw_provider(node, of_clk_hw_onecell_get, clk_data);
578 	if (r)
579 		goto unregister_clks;
580 
581 	platform_set_drvdata(pdev, clk_data);
582 
583 	if (mcd->rst_desc) {
584 		r = mtk_register_reset_controller_with_dev(&pdev->dev,
585 							   mcd->rst_desc);
586 		if (r)
587 			goto unregister_clks;
588 	}
589 
590 	if (mcd->need_runtime_pm)
591 		pm_runtime_put(&pdev->dev);
592 
593 	return r;
594 
595 unregister_clks:
596 	if (mcd->clks)
597 		mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
598 unregister_dividers:
599 	if (mcd->divider_clks)
600 		mtk_clk_unregister_dividers(mcd->divider_clks,
601 					    mcd->num_divider_clks, clk_data);
602 unregister_composites:
603 	if (mcd->composite_clks)
604 		mtk_clk_unregister_composites(mcd->composite_clks,
605 					      mcd->num_composite_clks, clk_data);
606 unregister_muxes:
607 	if (mcd->mux_clks)
608 		mtk_clk_unregister_muxes(mcd->mux_clks,
609 					 mcd->num_mux_clks, clk_data);
610 unregister_factors:
611 	if (mcd->factor_clks)
612 		mtk_clk_unregister_factors(mcd->factor_clks,
613 					   mcd->num_factor_clks, clk_data);
614 unregister_fixed_clks:
615 	if (mcd->fixed_clks)
616 		mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
617 					      mcd->num_fixed_clks, clk_data);
618 free_data:
619 	mtk_free_clk_data(clk_data);
620 free_base:
621 	if (mcd->shared_io && base)
622 		iounmap(base);
623 
624 	if (mcd->need_runtime_pm)
625 		pm_runtime_put(&pdev->dev);
626 	return r;
627 }
628 
629 static void __mtk_clk_simple_remove(struct platform_device *pdev,
630 				   struct device_node *node)
631 {
632 	struct clk_hw_onecell_data *clk_data = platform_get_drvdata(pdev);
633 	const struct mtk_clk_desc *mcd = device_get_match_data(&pdev->dev);
634 
635 	of_clk_del_provider(node);
636 	if (mcd->clks)
637 		mtk_clk_unregister_gates(mcd->clks, mcd->num_clks, clk_data);
638 	if (mcd->divider_clks)
639 		mtk_clk_unregister_dividers(mcd->divider_clks,
640 					    mcd->num_divider_clks, clk_data);
641 	if (mcd->composite_clks)
642 		mtk_clk_unregister_composites(mcd->composite_clks,
643 					      mcd->num_composite_clks, clk_data);
644 	if (mcd->mux_clks)
645 		mtk_clk_unregister_muxes(mcd->mux_clks,
646 					 mcd->num_mux_clks, clk_data);
647 	if (mcd->factor_clks)
648 		mtk_clk_unregister_factors(mcd->factor_clks,
649 					   mcd->num_factor_clks, clk_data);
650 	if (mcd->fixed_clks)
651 		mtk_clk_unregister_fixed_clks(mcd->fixed_clks,
652 					      mcd->num_fixed_clks, clk_data);
653 	mtk_free_clk_data(clk_data);
654 }
655 
656 int mtk_clk_pdev_probe(struct platform_device *pdev)
657 {
658 	struct device *dev = &pdev->dev;
659 	struct device_node *node = dev->parent->of_node;
660 
661 	return __mtk_clk_simple_probe(pdev, node);
662 }
663 EXPORT_SYMBOL_GPL(mtk_clk_pdev_probe);
664 
665 int mtk_clk_simple_probe(struct platform_device *pdev)
666 {
667 	struct device_node *node = pdev->dev.of_node;
668 
669 	return __mtk_clk_simple_probe(pdev, node);
670 }
671 EXPORT_SYMBOL_GPL(mtk_clk_simple_probe);
672 
673 void mtk_clk_pdev_remove(struct platform_device *pdev)
674 {
675 	struct device *dev = &pdev->dev;
676 	struct device_node *node = dev->parent->of_node;
677 
678 	__mtk_clk_simple_remove(pdev, node);
679 }
680 EXPORT_SYMBOL_GPL(mtk_clk_pdev_remove);
681 
682 void mtk_clk_simple_remove(struct platform_device *pdev)
683 {
684 	__mtk_clk_simple_remove(pdev, pdev->dev.of_node);
685 }
686 EXPORT_SYMBOL_GPL(mtk_clk_simple_remove);
687 
688 MODULE_LICENSE("GPL");
689