1 /*
2 * SCI Clock driver for keystone based devices
3 *
4 * Copyright (C) 2015-2016 Texas Instruments Incorporated - https://www.ti.com/
5 * Tero Kristo <t-kristo@ti.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 *
11 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
12 * kind, whether express or implied; without even the implied warranty
13 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 */
16 #include <linux/clk-provider.h>
17 #include <linux/err.h>
18 #include <linux/io.h>
19 #include <linux/module.h>
20 #include <linux/of_address.h>
21 #include <linux/of_device.h>
22 #include <linux/platform_device.h>
23 #include <linux/slab.h>
24 #include <linux/soc/ti/ti_sci_protocol.h>
25 #include <linux/bsearch.h>
26 #include <linux/list_sort.h>
27
28 #define SCI_CLK_SSC_ENABLE BIT(0)
29 #define SCI_CLK_ALLOW_FREQ_CHANGE BIT(1)
30 #define SCI_CLK_INPUT_TERMINATION BIT(2)
31
32 /**
33 * struct sci_clk_provider - TI SCI clock provider representation
34 * @sci: Handle to the System Control Interface protocol handler
35 * @ops: Pointer to the SCI ops to be used by the clocks
36 * @dev: Device pointer for the clock provider
37 * @clocks: Clocks array for this device
38 * @num_clocks: Total number of clocks for this provider
39 */
40 struct sci_clk_provider {
41 const struct ti_sci_handle *sci;
42 const struct ti_sci_clk_ops *ops;
43 struct device *dev;
44 struct sci_clk **clocks;
45 int num_clocks;
46 };
47
48 /**
49 * struct sci_clk - TI SCI clock representation
50 * @hw: Hardware clock cookie for common clock framework
51 * @dev_id: Device index
52 * @clk_id: Clock index
53 * @num_parents: Number of parents for this clock
54 * @provider: Master clock provider
55 * @flags: Flags for the clock
56 * @node: Link for handling clocks probed via DT
57 * @cached_req: Cached requested freq for determine rate calls
58 * @cached_res: Cached result freq for determine rate calls
59 */
60 struct sci_clk {
61 struct clk_hw hw;
62 u16 dev_id;
63 u32 clk_id;
64 u32 num_parents;
65 struct sci_clk_provider *provider;
66 u8 flags;
67 struct list_head node;
68 unsigned long cached_req;
69 unsigned long cached_res;
70 };
71
72 #define to_sci_clk(_hw) container_of(_hw, struct sci_clk, hw)
73
74 /**
75 * sci_clk_prepare - Prepare (enable) a TI SCI clock
76 * @hw: clock to prepare
77 *
78 * Prepares a clock to be actively used. Returns the SCI protocol status.
79 */
sci_clk_prepare(struct clk_hw * hw)80 static int sci_clk_prepare(struct clk_hw *hw)
81 {
82 struct sci_clk *clk = to_sci_clk(hw);
83 bool enable_ssc = clk->flags & SCI_CLK_SSC_ENABLE;
84 bool allow_freq_change = clk->flags & SCI_CLK_ALLOW_FREQ_CHANGE;
85 bool input_termination = clk->flags & SCI_CLK_INPUT_TERMINATION;
86
87 return clk->provider->ops->get_clock(clk->provider->sci, clk->dev_id,
88 clk->clk_id, enable_ssc,
89 allow_freq_change,
90 input_termination);
91 }
92
93 /**
94 * sci_clk_unprepare - Un-prepares (disables) a TI SCI clock
95 * @hw: clock to unprepare
96 *
97 * Un-prepares a clock from active state.
98 */
sci_clk_unprepare(struct clk_hw * hw)99 static void sci_clk_unprepare(struct clk_hw *hw)
100 {
101 struct sci_clk *clk = to_sci_clk(hw);
102 int ret;
103
104 ret = clk->provider->ops->put_clock(clk->provider->sci, clk->dev_id,
105 clk->clk_id);
106 if (ret)
107 dev_err(clk->provider->dev,
108 "unprepare failed for dev=%d, clk=%d, ret=%d\n",
109 clk->dev_id, clk->clk_id, ret);
110 }
111
112 /**
113 * sci_clk_is_prepared - Check if a TI SCI clock is prepared or not
114 * @hw: clock to check status for
115 *
116 * Checks if a clock is prepared (enabled) in hardware. Returns non-zero
117 * value if clock is enabled, zero otherwise.
118 */
sci_clk_is_prepared(struct clk_hw * hw)119 static int sci_clk_is_prepared(struct clk_hw *hw)
120 {
121 struct sci_clk *clk = to_sci_clk(hw);
122 bool req_state, current_state;
123 int ret;
124
125 ret = clk->provider->ops->is_on(clk->provider->sci, clk->dev_id,
126 clk->clk_id, &req_state,
127 ¤t_state);
128 if (ret) {
129 dev_err(clk->provider->dev,
130 "is_prepared failed for dev=%d, clk=%d, ret=%d\n",
131 clk->dev_id, clk->clk_id, ret);
132 return 0;
133 }
134
135 return req_state;
136 }
137
138 /**
139 * sci_clk_recalc_rate - Get clock rate for a TI SCI clock
140 * @hw: clock to get rate for
141 * @parent_rate: parent rate provided by common clock framework, not used
142 *
143 * Gets the current clock rate of a TI SCI clock. Returns the current
144 * clock rate, or zero in failure.
145 */
sci_clk_recalc_rate(struct clk_hw * hw,unsigned long parent_rate)146 static unsigned long sci_clk_recalc_rate(struct clk_hw *hw,
147 unsigned long parent_rate)
148 {
149 struct sci_clk *clk = to_sci_clk(hw);
150 u64 freq;
151 int ret;
152
153 ret = clk->provider->ops->get_freq(clk->provider->sci, clk->dev_id,
154 clk->clk_id, &freq);
155 if (ret) {
156 dev_err(clk->provider->dev,
157 "recalc-rate failed for dev=%d, clk=%d, ret=%d\n",
158 clk->dev_id, clk->clk_id, ret);
159 return 0;
160 }
161
162 return freq;
163 }
164
165 /**
166 * sci_clk_determine_rate - Determines a clock rate a clock can be set to
167 * @hw: clock to change rate for
168 * @req: requested rate configuration for the clock
169 *
170 * Determines a suitable clock rate and parent for a TI SCI clock.
171 * The parent handling is un-used, as generally the parent clock rates
172 * are not known by the kernel; instead these are internally handled
173 * by the firmware. Returns 0 on success, negative error value on failure.
174 */
sci_clk_determine_rate(struct clk_hw * hw,struct clk_rate_request * req)175 static int sci_clk_determine_rate(struct clk_hw *hw,
176 struct clk_rate_request *req)
177 {
178 struct sci_clk *clk = to_sci_clk(hw);
179 int ret;
180 u64 new_rate;
181
182 if (clk->cached_req && clk->cached_req == req->rate) {
183 req->rate = clk->cached_res;
184 return 0;
185 }
186
187 ret = clk->provider->ops->get_best_match_freq(clk->provider->sci,
188 clk->dev_id,
189 clk->clk_id,
190 req->min_rate,
191 req->rate,
192 req->max_rate,
193 &new_rate);
194 if (ret) {
195 dev_err(clk->provider->dev,
196 "determine-rate failed for dev=%d, clk=%d, ret=%d\n",
197 clk->dev_id, clk->clk_id, ret);
198 return ret;
199 }
200
201 clk->cached_req = req->rate;
202 clk->cached_res = new_rate;
203
204 req->rate = new_rate;
205
206 return 0;
207 }
208
209 /**
210 * sci_clk_set_rate - Set rate for a TI SCI clock
211 * @hw: clock to change rate for
212 * @rate: target rate for the clock
213 * @parent_rate: rate of the clock parent, not used for TI SCI clocks
214 *
215 * Sets a clock frequency for a TI SCI clock. Returns the TI SCI
216 * protocol status.
217 */
sci_clk_set_rate(struct clk_hw * hw,unsigned long rate,unsigned long parent_rate)218 static int sci_clk_set_rate(struct clk_hw *hw, unsigned long rate,
219 unsigned long parent_rate)
220 {
221 struct sci_clk *clk = to_sci_clk(hw);
222
223 return clk->provider->ops->set_freq(clk->provider->sci, clk->dev_id,
224 clk->clk_id, rate / 10 * 9, rate,
225 rate / 10 * 11);
226 }
227
228 /**
229 * sci_clk_get_parent - Get the current parent of a TI SCI clock
230 * @hw: clock to get parent for
231 *
232 * Returns the index of the currently selected parent for a TI SCI clock.
233 */
sci_clk_get_parent(struct clk_hw * hw)234 static u8 sci_clk_get_parent(struct clk_hw *hw)
235 {
236 struct sci_clk *clk = to_sci_clk(hw);
237 u32 parent_id = 0;
238 int ret;
239
240 ret = clk->provider->ops->get_parent(clk->provider->sci, clk->dev_id,
241 clk->clk_id, (void *)&parent_id);
242 if (ret) {
243 dev_err(clk->provider->dev,
244 "get-parent failed for dev=%d, clk=%d, ret=%d\n",
245 clk->dev_id, clk->clk_id, ret);
246 return 0;
247 }
248
249 parent_id = parent_id - clk->clk_id - 1;
250
251 return (u8)parent_id;
252 }
253
254 /**
255 * sci_clk_set_parent - Set the parent of a TI SCI clock
256 * @hw: clock to set parent for
257 * @index: new parent index for the clock
258 *
259 * Sets the parent of a TI SCI clock. Return TI SCI protocol status.
260 */
sci_clk_set_parent(struct clk_hw * hw,u8 index)261 static int sci_clk_set_parent(struct clk_hw *hw, u8 index)
262 {
263 struct sci_clk *clk = to_sci_clk(hw);
264
265 clk->cached_req = 0;
266
267 return clk->provider->ops->set_parent(clk->provider->sci, clk->dev_id,
268 clk->clk_id,
269 index + 1 + clk->clk_id);
270 }
271
272 static const struct clk_ops sci_clk_ops = {
273 .prepare = sci_clk_prepare,
274 .unprepare = sci_clk_unprepare,
275 .is_prepared = sci_clk_is_prepared,
276 .recalc_rate = sci_clk_recalc_rate,
277 .determine_rate = sci_clk_determine_rate,
278 .set_rate = sci_clk_set_rate,
279 .get_parent = sci_clk_get_parent,
280 .set_parent = sci_clk_set_parent,
281 };
282
283 /**
284 * _sci_clk_get - Gets a handle for an SCI clock
285 * @provider: Handle to SCI clock provider
286 * @sci_clk: Handle to the SCI clock to populate
287 *
288 * Gets a handle to an existing TI SCI hw clock, or builds a new clock
289 * entry and registers it with the common clock framework. Called from
290 * the common clock framework, when a corresponding of_clk_get call is
291 * executed, or recursively from itself when parsing parent clocks.
292 * Returns 0 on success, negative error code on failure.
293 */
_sci_clk_build(struct sci_clk_provider * provider,struct sci_clk * sci_clk)294 static int _sci_clk_build(struct sci_clk_provider *provider,
295 struct sci_clk *sci_clk)
296 {
297 struct clk_init_data init = { NULL };
298 char *name = NULL;
299 char **parent_names = NULL;
300 int i;
301 int ret = 0;
302
303 name = kasprintf(GFP_KERNEL, "clk:%d:%d", sci_clk->dev_id,
304 sci_clk->clk_id);
305 if (!name)
306 return -ENOMEM;
307
308 init.name = name;
309
310 /*
311 * From kernel point of view, we only care about a clocks parents,
312 * if it has more than 1 possible parent. In this case, it is going
313 * to have mux functionality. Otherwise it is going to act as a root
314 * clock.
315 */
316 if (sci_clk->num_parents < 2)
317 sci_clk->num_parents = 0;
318
319 if (sci_clk->num_parents) {
320 parent_names = kcalloc(sci_clk->num_parents, sizeof(char *),
321 GFP_KERNEL);
322
323 if (!parent_names) {
324 ret = -ENOMEM;
325 goto err;
326 }
327
328 for (i = 0; i < sci_clk->num_parents; i++) {
329 char *parent_name;
330
331 parent_name = kasprintf(GFP_KERNEL, "clk:%d:%d",
332 sci_clk->dev_id,
333 sci_clk->clk_id + 1 + i);
334 if (!parent_name) {
335 ret = -ENOMEM;
336 goto err;
337 }
338 parent_names[i] = parent_name;
339 }
340 init.parent_names = (void *)parent_names;
341 }
342
343 init.ops = &sci_clk_ops;
344 init.num_parents = sci_clk->num_parents;
345 sci_clk->hw.init = &init;
346
347 ret = devm_clk_hw_register(provider->dev, &sci_clk->hw);
348 if (ret)
349 dev_err(provider->dev, "failed clk register with %d\n", ret);
350
351 err:
352 if (parent_names) {
353 for (i = 0; i < sci_clk->num_parents; i++)
354 kfree(parent_names[i]);
355
356 kfree(parent_names);
357 }
358
359 kfree(name);
360
361 return ret;
362 }
363
_cmp_sci_clk(const void * a,const void * b)364 static int _cmp_sci_clk(const void *a, const void *b)
365 {
366 const struct sci_clk *ca = a;
367 const struct sci_clk *cb = *(struct sci_clk **)b;
368
369 if (ca->dev_id == cb->dev_id && ca->clk_id == cb->clk_id)
370 return 0;
371 if (ca->dev_id > cb->dev_id ||
372 (ca->dev_id == cb->dev_id && ca->clk_id > cb->clk_id))
373 return 1;
374 return -1;
375 }
376
377 /**
378 * sci_clk_get - Xlate function for getting clock handles
379 * @clkspec: device tree clock specifier
380 * @data: pointer to the clock provider
381 *
382 * Xlate function for retrieving clock TI SCI hw clock handles based on
383 * device tree clock specifier. Called from the common clock framework,
384 * when a corresponding of_clk_get call is executed. Returns a pointer
385 * to the TI SCI hw clock struct, or ERR_PTR value in failure.
386 */
sci_clk_get(struct of_phandle_args * clkspec,void * data)387 static struct clk_hw *sci_clk_get(struct of_phandle_args *clkspec, void *data)
388 {
389 struct sci_clk_provider *provider = data;
390 struct sci_clk **clk;
391 struct sci_clk key;
392
393 if (clkspec->args_count != 2)
394 return ERR_PTR(-EINVAL);
395
396 key.dev_id = clkspec->args[0];
397 key.clk_id = clkspec->args[1];
398
399 clk = bsearch(&key, provider->clocks, provider->num_clocks,
400 sizeof(clk), _cmp_sci_clk);
401
402 if (!clk)
403 return ERR_PTR(-ENODEV);
404
405 return &(*clk)->hw;
406 }
407
ti_sci_init_clocks(struct sci_clk_provider * p)408 static int ti_sci_init_clocks(struct sci_clk_provider *p)
409 {
410 int i;
411 int ret;
412
413 for (i = 0; i < p->num_clocks; i++) {
414 ret = _sci_clk_build(p, p->clocks[i]);
415 if (ret)
416 return ret;
417 }
418
419 return 0;
420 }
421
422 static const struct of_device_id ti_sci_clk_of_match[] = {
423 { .compatible = "ti,k2g-sci-clk" },
424 { /* Sentinel */ },
425 };
426 MODULE_DEVICE_TABLE(of, ti_sci_clk_of_match);
427
428 #ifdef CONFIG_TI_SCI_CLK_PROBE_FROM_FW
ti_sci_scan_clocks_from_fw(struct sci_clk_provider * provider)429 static int ti_sci_scan_clocks_from_fw(struct sci_clk_provider *provider)
430 {
431 int ret;
432 int num_clks = 0;
433 struct sci_clk **clks = NULL;
434 struct sci_clk **tmp_clks;
435 struct sci_clk *sci_clk;
436 int max_clks = 0;
437 int clk_id = 0;
438 int dev_id = 0;
439 u32 num_parents = 0;
440 int gap_size = 0;
441 struct device *dev = provider->dev;
442
443 while (1) {
444 ret = provider->ops->get_num_parents(provider->sci, dev_id,
445 clk_id,
446 (void *)&num_parents);
447 if (ret) {
448 gap_size++;
449 if (!clk_id) {
450 if (gap_size >= 5)
451 break;
452 dev_id++;
453 } else {
454 if (gap_size >= 2) {
455 dev_id++;
456 clk_id = 0;
457 gap_size = 0;
458 } else {
459 clk_id++;
460 }
461 }
462 continue;
463 }
464
465 gap_size = 0;
466
467 if (num_clks == max_clks) {
468 tmp_clks = devm_kmalloc_array(dev, max_clks + 64,
469 sizeof(sci_clk),
470 GFP_KERNEL);
471 memcpy(tmp_clks, clks, max_clks * sizeof(sci_clk));
472 if (max_clks)
473 devm_kfree(dev, clks);
474 max_clks += 64;
475 clks = tmp_clks;
476 }
477
478 sci_clk = devm_kzalloc(dev, sizeof(*sci_clk), GFP_KERNEL);
479 if (!sci_clk)
480 return -ENOMEM;
481 sci_clk->dev_id = dev_id;
482 sci_clk->clk_id = clk_id;
483 sci_clk->provider = provider;
484 sci_clk->num_parents = num_parents;
485
486 clks[num_clks] = sci_clk;
487
488 clk_id++;
489 num_clks++;
490 }
491
492 provider->clocks = devm_kmalloc_array(dev, num_clks, sizeof(sci_clk),
493 GFP_KERNEL);
494 if (!provider->clocks)
495 return -ENOMEM;
496
497 memcpy(provider->clocks, clks, num_clks * sizeof(sci_clk));
498
499 provider->num_clocks = num_clks;
500
501 devm_kfree(dev, clks);
502
503 return 0;
504 }
505
506 #else
507
_cmp_sci_clk_list(void * priv,struct list_head * a,struct list_head * b)508 static int _cmp_sci_clk_list(void *priv, struct list_head *a,
509 struct list_head *b)
510 {
511 struct sci_clk *ca = container_of(a, struct sci_clk, node);
512 struct sci_clk *cb = container_of(b, struct sci_clk, node);
513
514 return _cmp_sci_clk(ca, &cb);
515 }
516
ti_sci_scan_clocks_from_dt(struct sci_clk_provider * provider)517 static int ti_sci_scan_clocks_from_dt(struct sci_clk_provider *provider)
518 {
519 struct device *dev = provider->dev;
520 struct device_node *np = NULL;
521 int ret;
522 int index;
523 struct of_phandle_args args;
524 struct list_head clks;
525 struct sci_clk *sci_clk, *prev;
526 int num_clks = 0;
527 int num_parents;
528 int clk_id;
529 const char * const clk_names[] = {
530 "clocks", "assigned-clocks", "assigned-clock-parents", NULL
531 };
532 const char * const *clk_name;
533
534 INIT_LIST_HEAD(&clks);
535
536 clk_name = clk_names;
537
538 while (*clk_name) {
539 np = of_find_node_with_property(np, *clk_name);
540 if (!np) {
541 clk_name++;
542 continue;
543 }
544
545 if (!of_device_is_available(np))
546 continue;
547
548 index = 0;
549
550 do {
551 ret = of_parse_phandle_with_args(np, *clk_name,
552 "#clock-cells", index,
553 &args);
554 if (ret)
555 break;
556
557 if (args.args_count == 2 && args.np == dev->of_node) {
558 sci_clk = devm_kzalloc(dev, sizeof(*sci_clk),
559 GFP_KERNEL);
560 if (!sci_clk)
561 return -ENOMEM;
562
563 sci_clk->dev_id = args.args[0];
564 sci_clk->clk_id = args.args[1];
565 sci_clk->provider = provider;
566 provider->ops->get_num_parents(provider->sci,
567 sci_clk->dev_id,
568 sci_clk->clk_id,
569 (void *)&sci_clk->num_parents);
570 list_add_tail(&sci_clk->node, &clks);
571
572 num_clks++;
573
574 num_parents = sci_clk->num_parents;
575 if (num_parents == 1)
576 num_parents = 0;
577
578 /*
579 * Linux kernel has inherent limitation
580 * of 255 clock parents at the moment.
581 * Right now, it is not expected that
582 * any mux clock from sci-clk driver
583 * would exceed that limit either, but
584 * the ABI basically provides that
585 * possibility. Print out a warning if
586 * this happens for any clock.
587 */
588 if (num_parents >= 255) {
589 dev_warn(dev, "too many parents for dev=%d, clk=%d (%d), cropping to 255.\n",
590 sci_clk->dev_id,
591 sci_clk->clk_id, num_parents);
592 num_parents = 255;
593 }
594
595 clk_id = args.args[1] + 1;
596
597 while (num_parents--) {
598 sci_clk = devm_kzalloc(dev,
599 sizeof(*sci_clk),
600 GFP_KERNEL);
601 if (!sci_clk)
602 return -ENOMEM;
603 sci_clk->dev_id = args.args[0];
604 sci_clk->clk_id = clk_id++;
605 sci_clk->provider = provider;
606 list_add_tail(&sci_clk->node, &clks);
607
608 num_clks++;
609 }
610 }
611
612 index++;
613 } while (args.np);
614 }
615
616 list_sort(NULL, &clks, _cmp_sci_clk_list);
617
618 provider->clocks = devm_kmalloc_array(dev, num_clks, sizeof(sci_clk),
619 GFP_KERNEL);
620 if (!provider->clocks)
621 return -ENOMEM;
622
623 num_clks = 0;
624 prev = NULL;
625
626 list_for_each_entry(sci_clk, &clks, node) {
627 if (prev && prev->dev_id == sci_clk->dev_id &&
628 prev->clk_id == sci_clk->clk_id)
629 continue;
630
631 provider->clocks[num_clks++] = sci_clk;
632 prev = sci_clk;
633 }
634
635 provider->num_clocks = num_clks;
636
637 return 0;
638 }
639 #endif
640
641 /**
642 * ti_sci_clk_probe - Probe function for the TI SCI clock driver
643 * @pdev: platform device pointer to be probed
644 *
645 * Probes the TI SCI clock device. Allocates a new clock provider
646 * and registers this to the common clock framework. Also applies
647 * any required flags to the identified clocks via clock lists
648 * supplied from DT. Returns 0 for success, negative error value
649 * for failure.
650 */
ti_sci_clk_probe(struct platform_device * pdev)651 static int ti_sci_clk_probe(struct platform_device *pdev)
652 {
653 struct device *dev = &pdev->dev;
654 struct device_node *np = dev->of_node;
655 struct sci_clk_provider *provider;
656 const struct ti_sci_handle *handle;
657 int ret;
658
659 handle = devm_ti_sci_get_handle(dev);
660 if (IS_ERR(handle))
661 return PTR_ERR(handle);
662
663 provider = devm_kzalloc(dev, sizeof(*provider), GFP_KERNEL);
664 if (!provider)
665 return -ENOMEM;
666
667 provider->sci = handle;
668 provider->ops = &handle->ops.clk_ops;
669 provider->dev = dev;
670
671 #ifdef CONFIG_TI_SCI_CLK_PROBE_FROM_FW
672 ret = ti_sci_scan_clocks_from_fw(provider);
673 if (ret) {
674 dev_err(dev, "scan clocks from FW failed: %d\n", ret);
675 return ret;
676 }
677 #else
678 ret = ti_sci_scan_clocks_from_dt(provider);
679 if (ret) {
680 dev_err(dev, "scan clocks from DT failed: %d\n", ret);
681 return ret;
682 }
683 #endif
684
685 ret = ti_sci_init_clocks(provider);
686 if (ret) {
687 pr_err("ti-sci-init-clocks failed.\n");
688 return ret;
689 }
690
691 return of_clk_add_hw_provider(np, sci_clk_get, provider);
692 }
693
694 /**
695 * ti_sci_clk_remove - Remove TI SCI clock device
696 * @pdev: platform device pointer for the device to be removed
697 *
698 * Removes the TI SCI device. Unregisters the clock provider registered
699 * via common clock framework. Any memory allocated for the device will
700 * be free'd silently via the devm framework. Returns 0 always.
701 */
ti_sci_clk_remove(struct platform_device * pdev)702 static int ti_sci_clk_remove(struct platform_device *pdev)
703 {
704 of_clk_del_provider(pdev->dev.of_node);
705
706 return 0;
707 }
708
709 static struct platform_driver ti_sci_clk_driver = {
710 .probe = ti_sci_clk_probe,
711 .remove = ti_sci_clk_remove,
712 .driver = {
713 .name = "ti-sci-clk",
714 .of_match_table = of_match_ptr(ti_sci_clk_of_match),
715 },
716 };
717 module_platform_driver(ti_sci_clk_driver);
718
719 MODULE_LICENSE("GPL v2");
720 MODULE_DESCRIPTION("TI System Control Interface(SCI) Clock driver");
721 MODULE_AUTHOR("Tero Kristo");
722 MODULE_ALIAS("platform:ti-sci-clk");
723