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723d0530 MR |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * Kunit test for clk rate management | |
4 | */ | |
5 | #include <linux/clk.h> | |
6 | #include <linux/clk-provider.h> | |
7 | ||
8 | /* Needed for clk_hw_get_clk() */ | |
9 | #include "clk.h" | |
10 | ||
11 | #include <kunit/test.h> | |
12 | ||
13 | #define DUMMY_CLOCK_INIT_RATE (42 * 1000 * 1000) | |
14 | #define DUMMY_CLOCK_RATE_1 (142 * 1000 * 1000) | |
15 | #define DUMMY_CLOCK_RATE_2 (242 * 1000 * 1000) | |
16 | ||
17 | struct clk_dummy_context { | |
18 | struct clk_hw hw; | |
19 | unsigned long rate; | |
20 | }; | |
21 | ||
22 | static unsigned long clk_dummy_recalc_rate(struct clk_hw *hw, | |
23 | unsigned long parent_rate) | |
24 | { | |
25 | struct clk_dummy_context *ctx = | |
26 | container_of(hw, struct clk_dummy_context, hw); | |
27 | ||
28 | return ctx->rate; | |
29 | } | |
30 | ||
31 | static int clk_dummy_determine_rate(struct clk_hw *hw, | |
32 | struct clk_rate_request *req) | |
33 | { | |
34 | /* Just return the same rate without modifying it */ | |
35 | return 0; | |
36 | } | |
37 | ||
38 | static int clk_dummy_maximize_rate(struct clk_hw *hw, | |
39 | struct clk_rate_request *req) | |
40 | { | |
41 | /* | |
42 | * If there's a maximum set, always run the clock at the maximum | |
43 | * allowed. | |
44 | */ | |
45 | if (req->max_rate < ULONG_MAX) | |
46 | req->rate = req->max_rate; | |
47 | ||
48 | return 0; | |
49 | } | |
50 | ||
51 | static int clk_dummy_minimize_rate(struct clk_hw *hw, | |
52 | struct clk_rate_request *req) | |
53 | { | |
54 | /* | |
55 | * If there's a minimum set, always run the clock at the minimum | |
56 | * allowed. | |
57 | */ | |
58 | if (req->min_rate > 0) | |
59 | req->rate = req->min_rate; | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
64 | static int clk_dummy_set_rate(struct clk_hw *hw, | |
65 | unsigned long rate, | |
66 | unsigned long parent_rate) | |
67 | { | |
68 | struct clk_dummy_context *ctx = | |
69 | container_of(hw, struct clk_dummy_context, hw); | |
70 | ||
71 | ctx->rate = rate; | |
72 | return 0; | |
73 | } | |
74 | ||
481f541c MR |
75 | static int clk_dummy_single_set_parent(struct clk_hw *hw, u8 index) |
76 | { | |
77 | if (index >= clk_hw_get_num_parents(hw)) | |
78 | return -EINVAL; | |
79 | ||
80 | return 0; | |
81 | } | |
82 | ||
83 | static u8 clk_dummy_single_get_parent(struct clk_hw *hw) | |
84 | { | |
85 | return 0; | |
86 | } | |
87 | ||
723d0530 MR |
88 | static const struct clk_ops clk_dummy_rate_ops = { |
89 | .recalc_rate = clk_dummy_recalc_rate, | |
90 | .determine_rate = clk_dummy_determine_rate, | |
91 | .set_rate = clk_dummy_set_rate, | |
92 | }; | |
93 | ||
94 | static const struct clk_ops clk_dummy_maximize_rate_ops = { | |
95 | .recalc_rate = clk_dummy_recalc_rate, | |
96 | .determine_rate = clk_dummy_maximize_rate, | |
97 | .set_rate = clk_dummy_set_rate, | |
98 | }; | |
99 | ||
100 | static const struct clk_ops clk_dummy_minimize_rate_ops = { | |
101 | .recalc_rate = clk_dummy_recalc_rate, | |
102 | .determine_rate = clk_dummy_minimize_rate, | |
103 | .set_rate = clk_dummy_set_rate, | |
104 | }; | |
105 | ||
481f541c MR |
106 | static const struct clk_ops clk_dummy_single_parent_ops = { |
107 | .set_parent = clk_dummy_single_set_parent, | |
108 | .get_parent = clk_dummy_single_get_parent, | |
109 | }; | |
110 | ||
74933ef2 MR |
111 | struct clk_multiple_parent_ctx { |
112 | struct clk_dummy_context parents_ctx[2]; | |
113 | struct clk_hw hw; | |
114 | u8 current_parent; | |
115 | }; | |
116 | ||
117 | static int clk_multiple_parents_mux_set_parent(struct clk_hw *hw, u8 index) | |
118 | { | |
119 | struct clk_multiple_parent_ctx *ctx = | |
120 | container_of(hw, struct clk_multiple_parent_ctx, hw); | |
121 | ||
122 | if (index >= clk_hw_get_num_parents(hw)) | |
123 | return -EINVAL; | |
124 | ||
125 | ctx->current_parent = index; | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | static u8 clk_multiple_parents_mux_get_parent(struct clk_hw *hw) | |
131 | { | |
132 | struct clk_multiple_parent_ctx *ctx = | |
133 | container_of(hw, struct clk_multiple_parent_ctx, hw); | |
134 | ||
135 | return ctx->current_parent; | |
136 | } | |
137 | ||
138 | static const struct clk_ops clk_multiple_parents_mux_ops = { | |
139 | .get_parent = clk_multiple_parents_mux_get_parent, | |
140 | .set_parent = clk_multiple_parents_mux_set_parent, | |
141 | .determine_rate = __clk_mux_determine_rate_closest, | |
142 | }; | |
143 | ||
723d0530 MR |
144 | static int clk_test_init_with_ops(struct kunit *test, const struct clk_ops *ops) |
145 | { | |
146 | struct clk_dummy_context *ctx; | |
147 | struct clk_init_data init = { }; | |
148 | int ret; | |
149 | ||
150 | ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); | |
151 | if (!ctx) | |
152 | return -ENOMEM; | |
153 | ctx->rate = DUMMY_CLOCK_INIT_RATE; | |
154 | test->priv = ctx; | |
155 | ||
156 | init.name = "test_dummy_rate"; | |
157 | init.ops = ops; | |
158 | ctx->hw.init = &init; | |
159 | ||
160 | ret = clk_hw_register(NULL, &ctx->hw); | |
161 | if (ret) | |
162 | return ret; | |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
167 | static int clk_test_init(struct kunit *test) | |
168 | { | |
169 | return clk_test_init_with_ops(test, &clk_dummy_rate_ops); | |
170 | } | |
171 | ||
172 | static int clk_maximize_test_init(struct kunit *test) | |
173 | { | |
174 | return clk_test_init_with_ops(test, &clk_dummy_maximize_rate_ops); | |
175 | } | |
176 | ||
177 | static int clk_minimize_test_init(struct kunit *test) | |
178 | { | |
179 | return clk_test_init_with_ops(test, &clk_dummy_minimize_rate_ops); | |
180 | } | |
181 | ||
182 | static void clk_test_exit(struct kunit *test) | |
183 | { | |
184 | struct clk_dummy_context *ctx = test->priv; | |
185 | ||
186 | clk_hw_unregister(&ctx->hw); | |
187 | } | |
188 | ||
189 | /* | |
190 | * Test that the actual rate matches what is returned by clk_get_rate() | |
191 | */ | |
192 | static void clk_test_get_rate(struct kunit *test) | |
193 | { | |
194 | struct clk_dummy_context *ctx = test->priv; | |
195 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 196 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
197 | unsigned long rate; |
198 | ||
199 | rate = clk_get_rate(clk); | |
200 | KUNIT_ASSERT_GT(test, rate, 0); | |
201 | KUNIT_EXPECT_EQ(test, rate, ctx->rate); | |
aac00c7f MR |
202 | |
203 | clk_put(clk); | |
723d0530 MR |
204 | } |
205 | ||
206 | /* | |
207 | * Test that, after a call to clk_set_rate(), the rate returned by | |
208 | * clk_get_rate() matches. | |
209 | * | |
210 | * This assumes that clk_ops.determine_rate or clk_ops.round_rate won't | |
211 | * modify the requested rate, which is our case in clk_dummy_rate_ops. | |
212 | */ | |
213 | static void clk_test_set_get_rate(struct kunit *test) | |
214 | { | |
215 | struct clk_dummy_context *ctx = test->priv; | |
216 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 217 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
218 | unsigned long rate; |
219 | ||
220 | KUNIT_ASSERT_EQ(test, | |
221 | clk_set_rate(clk, DUMMY_CLOCK_RATE_1), | |
222 | 0); | |
223 | ||
224 | rate = clk_get_rate(clk); | |
225 | KUNIT_ASSERT_GT(test, rate, 0); | |
226 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1); | |
aac00c7f MR |
227 | |
228 | clk_put(clk); | |
723d0530 MR |
229 | } |
230 | ||
231 | /* | |
232 | * Test that, after several calls to clk_set_rate(), the rate returned | |
233 | * by clk_get_rate() matches the last one. | |
234 | * | |
235 | * This assumes that clk_ops.determine_rate or clk_ops.round_rate won't | |
236 | * modify the requested rate, which is our case in clk_dummy_rate_ops. | |
237 | */ | |
238 | static void clk_test_set_set_get_rate(struct kunit *test) | |
239 | { | |
240 | struct clk_dummy_context *ctx = test->priv; | |
241 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 242 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
243 | unsigned long rate; |
244 | ||
245 | KUNIT_ASSERT_EQ(test, | |
246 | clk_set_rate(clk, DUMMY_CLOCK_RATE_1), | |
247 | 0); | |
248 | ||
249 | KUNIT_ASSERT_EQ(test, | |
250 | clk_set_rate(clk, DUMMY_CLOCK_RATE_2), | |
251 | 0); | |
252 | ||
253 | rate = clk_get_rate(clk); | |
254 | KUNIT_ASSERT_GT(test, rate, 0); | |
255 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2); | |
aac00c7f MR |
256 | |
257 | clk_put(clk); | |
723d0530 MR |
258 | } |
259 | ||
260 | /* | |
261 | * Test that clk_round_rate and clk_set_rate are consitent and will | |
262 | * return the same frequency. | |
263 | */ | |
264 | static void clk_test_round_set_get_rate(struct kunit *test) | |
265 | { | |
266 | struct clk_dummy_context *ctx = test->priv; | |
267 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 268 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
269 | unsigned long rounded_rate, set_rate; |
270 | ||
271 | rounded_rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_1); | |
272 | KUNIT_ASSERT_GT(test, rounded_rate, 0); | |
273 | KUNIT_EXPECT_EQ(test, rounded_rate, DUMMY_CLOCK_RATE_1); | |
274 | ||
275 | KUNIT_ASSERT_EQ(test, | |
276 | clk_set_rate(clk, DUMMY_CLOCK_RATE_1), | |
277 | 0); | |
278 | ||
279 | set_rate = clk_get_rate(clk); | |
280 | KUNIT_ASSERT_GT(test, set_rate, 0); | |
281 | KUNIT_EXPECT_EQ(test, rounded_rate, set_rate); | |
aac00c7f MR |
282 | |
283 | clk_put(clk); | |
723d0530 MR |
284 | } |
285 | ||
286 | static struct kunit_case clk_test_cases[] = { | |
287 | KUNIT_CASE(clk_test_get_rate), | |
288 | KUNIT_CASE(clk_test_set_get_rate), | |
289 | KUNIT_CASE(clk_test_set_set_get_rate), | |
290 | KUNIT_CASE(clk_test_round_set_get_rate), | |
291 | {} | |
292 | }; | |
293 | ||
090962b6 MR |
294 | /* |
295 | * Test suite for a basic rate clock, without any parent. | |
296 | * | |
297 | * These tests exercise the rate API with simple scenarios | |
298 | */ | |
723d0530 MR |
299 | static struct kunit_suite clk_test_suite = { |
300 | .name = "clk-test", | |
301 | .init = clk_test_init, | |
302 | .exit = clk_test_exit, | |
303 | .test_cases = clk_test_cases, | |
304 | }; | |
305 | ||
350575ab MR |
306 | static int clk_uncached_test_init(struct kunit *test) |
307 | { | |
308 | struct clk_dummy_context *ctx; | |
309 | int ret; | |
310 | ||
311 | ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); | |
312 | if (!ctx) | |
313 | return -ENOMEM; | |
314 | test->priv = ctx; | |
315 | ||
316 | ctx->rate = DUMMY_CLOCK_INIT_RATE; | |
317 | ctx->hw.init = CLK_HW_INIT_NO_PARENT("test-clk", | |
318 | &clk_dummy_rate_ops, | |
319 | CLK_GET_RATE_NOCACHE); | |
320 | ||
321 | ret = clk_hw_register(NULL, &ctx->hw); | |
322 | if (ret) | |
323 | return ret; | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
328 | /* | |
329 | * Test that for an uncached clock, the clock framework doesn't cache | |
330 | * the rate and clk_get_rate() will return the underlying clock rate | |
331 | * even if it changed. | |
332 | */ | |
333 | static void clk_test_uncached_get_rate(struct kunit *test) | |
334 | { | |
335 | struct clk_dummy_context *ctx = test->priv; | |
336 | struct clk_hw *hw = &ctx->hw; | |
337 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
338 | unsigned long rate; | |
339 | ||
340 | rate = clk_get_rate(clk); | |
341 | KUNIT_ASSERT_GT(test, rate, 0); | |
342 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_INIT_RATE); | |
343 | ||
344 | /* We change the rate behind the clock framework's back */ | |
345 | ctx->rate = DUMMY_CLOCK_RATE_1; | |
346 | rate = clk_get_rate(clk); | |
347 | KUNIT_ASSERT_GT(test, rate, 0); | |
348 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1); | |
349 | ||
350 | clk_put(clk); | |
351 | } | |
352 | ||
353 | /* | |
354 | * Test that for an uncached clock, clk_set_rate_range() will work | |
355 | * properly if the rate hasn't changed. | |
356 | */ | |
357 | static void clk_test_uncached_set_range(struct kunit *test) | |
358 | { | |
359 | struct clk_dummy_context *ctx = test->priv; | |
360 | struct clk_hw *hw = &ctx->hw; | |
361 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
362 | unsigned long rate; | |
363 | ||
364 | KUNIT_ASSERT_EQ(test, | |
365 | clk_set_rate_range(clk, | |
366 | DUMMY_CLOCK_RATE_1, | |
367 | DUMMY_CLOCK_RATE_2), | |
368 | 0); | |
369 | ||
370 | rate = clk_get_rate(clk); | |
371 | KUNIT_ASSERT_GT(test, rate, 0); | |
372 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1); | |
373 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2); | |
374 | ||
375 | clk_put(clk); | |
376 | } | |
377 | ||
3afb0723 MR |
378 | /* |
379 | * Test that for an uncached clock, clk_set_rate_range() will work | |
380 | * properly if the rate has changed in hardware. | |
381 | * | |
382 | * In this case, it means that if the rate wasn't initially in the range | |
383 | * we're trying to set, but got changed at some point into the range | |
384 | * without the kernel knowing about it, its rate shouldn't be affected. | |
385 | */ | |
386 | static void clk_test_uncached_updated_rate_set_range(struct kunit *test) | |
387 | { | |
388 | struct clk_dummy_context *ctx = test->priv; | |
389 | struct clk_hw *hw = &ctx->hw; | |
390 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
391 | unsigned long rate; | |
392 | ||
393 | /* We change the rate behind the clock framework's back */ | |
394 | ctx->rate = DUMMY_CLOCK_RATE_1 + 1000; | |
395 | KUNIT_ASSERT_EQ(test, | |
396 | clk_set_rate_range(clk, | |
397 | DUMMY_CLOCK_RATE_1, | |
398 | DUMMY_CLOCK_RATE_2), | |
399 | 0); | |
400 | ||
401 | rate = clk_get_rate(clk); | |
402 | KUNIT_ASSERT_GT(test, rate, 0); | |
403 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1 + 1000); | |
404 | ||
405 | clk_put(clk); | |
406 | } | |
407 | ||
350575ab MR |
408 | static struct kunit_case clk_uncached_test_cases[] = { |
409 | KUNIT_CASE(clk_test_uncached_get_rate), | |
410 | KUNIT_CASE(clk_test_uncached_set_range), | |
3afb0723 | 411 | KUNIT_CASE(clk_test_uncached_updated_rate_set_range), |
350575ab MR |
412 | {} |
413 | }; | |
414 | ||
415 | /* | |
416 | * Test suite for a basic, uncached, rate clock, without any parent. | |
417 | * | |
418 | * These tests exercise the rate API with simple scenarios | |
419 | */ | |
420 | static struct kunit_suite clk_uncached_test_suite = { | |
421 | .name = "clk-uncached-test", | |
422 | .init = clk_uncached_test_init, | |
423 | .exit = clk_test_exit, | |
424 | .test_cases = clk_uncached_test_cases, | |
425 | }; | |
426 | ||
74933ef2 MR |
427 | static int |
428 | clk_multiple_parents_mux_test_init(struct kunit *test) | |
429 | { | |
430 | struct clk_multiple_parent_ctx *ctx; | |
431 | const char *parents[2] = { "parent-0", "parent-1"}; | |
432 | int ret; | |
433 | ||
434 | ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); | |
435 | if (!ctx) | |
436 | return -ENOMEM; | |
437 | test->priv = ctx; | |
438 | ||
439 | ctx->parents_ctx[0].hw.init = CLK_HW_INIT_NO_PARENT("parent-0", | |
440 | &clk_dummy_rate_ops, | |
441 | 0); | |
442 | ctx->parents_ctx[0].rate = DUMMY_CLOCK_RATE_1; | |
443 | ret = clk_hw_register(NULL, &ctx->parents_ctx[0].hw); | |
444 | if (ret) | |
445 | return ret; | |
446 | ||
447 | ctx->parents_ctx[1].hw.init = CLK_HW_INIT_NO_PARENT("parent-1", | |
448 | &clk_dummy_rate_ops, | |
449 | 0); | |
450 | ctx->parents_ctx[1].rate = DUMMY_CLOCK_RATE_2; | |
451 | ret = clk_hw_register(NULL, &ctx->parents_ctx[1].hw); | |
452 | if (ret) | |
453 | return ret; | |
454 | ||
455 | ctx->current_parent = 0; | |
456 | ctx->hw.init = CLK_HW_INIT_PARENTS("test-mux", parents, | |
457 | &clk_multiple_parents_mux_ops, | |
458 | CLK_SET_RATE_PARENT); | |
459 | ret = clk_hw_register(NULL, &ctx->hw); | |
460 | if (ret) | |
461 | return ret; | |
462 | ||
463 | return 0; | |
464 | } | |
465 | ||
466 | static void | |
467 | clk_multiple_parents_mux_test_exit(struct kunit *test) | |
468 | { | |
469 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
470 | ||
471 | clk_hw_unregister(&ctx->hw); | |
472 | clk_hw_unregister(&ctx->parents_ctx[0].hw); | |
473 | clk_hw_unregister(&ctx->parents_ctx[1].hw); | |
474 | } | |
475 | ||
476 | /* | |
477 | * Test that for a clock with multiple parents, clk_get_parent() | |
478 | * actually returns the current one. | |
479 | */ | |
480 | static void | |
481 | clk_test_multiple_parents_mux_get_parent(struct kunit *test) | |
482 | { | |
483 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
484 | struct clk_hw *hw = &ctx->hw; | |
485 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
486 | struct clk *parent = clk_hw_get_clk(&ctx->parents_ctx[0].hw, NULL); | |
487 | ||
488 | KUNIT_EXPECT_TRUE(test, clk_is_match(clk_get_parent(clk), parent)); | |
489 | ||
490 | clk_put(parent); | |
491 | clk_put(clk); | |
492 | } | |
493 | ||
1234a2c4 MR |
494 | /* |
495 | * Test that for a clock with a multiple parents, clk_has_parent() | |
496 | * actually reports all of them as parents. | |
497 | */ | |
498 | static void | |
499 | clk_test_multiple_parents_mux_has_parent(struct kunit *test) | |
500 | { | |
501 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
502 | struct clk_hw *hw = &ctx->hw; | |
503 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
504 | struct clk *parent; | |
505 | ||
506 | parent = clk_hw_get_clk(&ctx->parents_ctx[0].hw, NULL); | |
507 | KUNIT_EXPECT_TRUE(test, clk_has_parent(clk, parent)); | |
508 | clk_put(parent); | |
509 | ||
510 | parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL); | |
511 | KUNIT_EXPECT_TRUE(test, clk_has_parent(clk, parent)); | |
512 | clk_put(parent); | |
513 | ||
514 | clk_put(clk); | |
515 | } | |
516 | ||
433fb8a6 MR |
517 | /* |
518 | * Test that for a clock with a multiple parents, if we set a range on | |
519 | * that clock and the parent is changed, its rate after the reparenting | |
520 | * is still within the range we asked for. | |
521 | * | |
522 | * FIXME: clk_set_parent() only does the reparenting but doesn't | |
523 | * reevaluate whether the new clock rate is within its boundaries or | |
524 | * not. | |
525 | */ | |
526 | static void | |
527 | clk_test_multiple_parents_mux_set_range_set_parent_get_rate(struct kunit *test) | |
528 | { | |
529 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
530 | struct clk_hw *hw = &ctx->hw; | |
531 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
532 | struct clk *parent1, *parent2; | |
533 | unsigned long rate; | |
534 | int ret; | |
535 | ||
536 | kunit_skip(test, "This needs to be fixed in the core."); | |
537 | ||
538 | parent1 = clk_hw_get_clk(&ctx->parents_ctx[0].hw, NULL); | |
539 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent1); | |
540 | KUNIT_ASSERT_TRUE(test, clk_is_match(clk_get_parent(clk), parent1)); | |
541 | ||
542 | parent2 = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL); | |
543 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent2); | |
544 | ||
545 | ret = clk_set_rate(parent1, DUMMY_CLOCK_RATE_1); | |
546 | KUNIT_ASSERT_EQ(test, ret, 0); | |
547 | ||
548 | ret = clk_set_rate(parent2, DUMMY_CLOCK_RATE_2); | |
549 | KUNIT_ASSERT_EQ(test, ret, 0); | |
550 | ||
551 | ret = clk_set_rate_range(clk, | |
552 | DUMMY_CLOCK_RATE_1 - 1000, | |
553 | DUMMY_CLOCK_RATE_1 + 1000); | |
554 | KUNIT_ASSERT_EQ(test, ret, 0); | |
555 | ||
556 | ret = clk_set_parent(clk, parent2); | |
557 | KUNIT_ASSERT_EQ(test, ret, 0); | |
558 | ||
559 | rate = clk_get_rate(clk); | |
560 | KUNIT_ASSERT_GT(test, rate, 0); | |
561 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1 - 1000); | |
562 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_1 + 1000); | |
563 | ||
564 | clk_put(parent2); | |
565 | clk_put(parent1); | |
566 | clk_put(clk); | |
567 | } | |
568 | ||
74933ef2 MR |
569 | static struct kunit_case clk_multiple_parents_mux_test_cases[] = { |
570 | KUNIT_CASE(clk_test_multiple_parents_mux_get_parent), | |
1234a2c4 | 571 | KUNIT_CASE(clk_test_multiple_parents_mux_has_parent), |
433fb8a6 | 572 | KUNIT_CASE(clk_test_multiple_parents_mux_set_range_set_parent_get_rate), |
74933ef2 MR |
573 | {} |
574 | }; | |
575 | ||
576 | /* | |
577 | * Test suite for a basic mux clock with two parents, with | |
578 | * CLK_SET_RATE_PARENT on the child. | |
579 | * | |
580 | * These tests exercise the consumer API and check that the state of the | |
581 | * child and parents are sane and consistent. | |
582 | */ | |
583 | static struct kunit_suite | |
584 | clk_multiple_parents_mux_test_suite = { | |
585 | .name = "clk-multiple-parents-mux-test", | |
586 | .init = clk_multiple_parents_mux_test_init, | |
587 | .exit = clk_multiple_parents_mux_test_exit, | |
588 | .test_cases = clk_multiple_parents_mux_test_cases, | |
589 | }; | |
590 | ||
2e9cad1a MR |
591 | static int |
592 | clk_orphan_transparent_multiple_parent_mux_test_init(struct kunit *test) | |
593 | { | |
594 | struct clk_multiple_parent_ctx *ctx; | |
595 | const char *parents[2] = { "missing-parent", "proper-parent"}; | |
596 | int ret; | |
597 | ||
598 | ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); | |
599 | if (!ctx) | |
600 | return -ENOMEM; | |
601 | test->priv = ctx; | |
602 | ||
603 | ctx->parents_ctx[1].hw.init = CLK_HW_INIT_NO_PARENT("proper-parent", | |
604 | &clk_dummy_rate_ops, | |
605 | 0); | |
606 | ctx->parents_ctx[1].rate = DUMMY_CLOCK_INIT_RATE; | |
607 | ret = clk_hw_register(NULL, &ctx->parents_ctx[1].hw); | |
608 | if (ret) | |
609 | return ret; | |
610 | ||
611 | ctx->hw.init = CLK_HW_INIT_PARENTS("test-orphan-mux", parents, | |
612 | &clk_multiple_parents_mux_ops, | |
613 | CLK_SET_RATE_PARENT); | |
614 | ret = clk_hw_register(NULL, &ctx->hw); | |
615 | if (ret) | |
616 | return ret; | |
617 | ||
618 | return 0; | |
619 | } | |
620 | ||
621 | static void | |
622 | clk_orphan_transparent_multiple_parent_mux_test_exit(struct kunit *test) | |
623 | { | |
624 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
625 | ||
626 | clk_hw_unregister(&ctx->hw); | |
627 | clk_hw_unregister(&ctx->parents_ctx[1].hw); | |
628 | } | |
629 | ||
630 | /* | |
631 | * Test that, for a mux whose current parent hasn't been registered yet and is | |
632 | * thus orphan, clk_get_parent() will return NULL. | |
633 | */ | |
634 | static void | |
635 | clk_test_orphan_transparent_multiple_parent_mux_get_parent(struct kunit *test) | |
636 | { | |
637 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
638 | struct clk_hw *hw = &ctx->hw; | |
639 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
640 | ||
641 | KUNIT_EXPECT_PTR_EQ(test, clk_get_parent(clk), NULL); | |
642 | ||
643 | clk_put(clk); | |
644 | } | |
645 | ||
646 | /* | |
647 | * Test that, for a mux whose current parent hasn't been registered yet, | |
648 | * calling clk_set_parent() to a valid parent will properly update the | |
649 | * mux parent and its orphan status. | |
650 | */ | |
651 | static void | |
652 | clk_test_orphan_transparent_multiple_parent_mux_set_parent(struct kunit *test) | |
653 | { | |
654 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
655 | struct clk_hw *hw = &ctx->hw; | |
656 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
657 | struct clk *parent, *new_parent; | |
658 | int ret; | |
659 | ||
660 | parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL); | |
661 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); | |
662 | ||
663 | ret = clk_set_parent(clk, parent); | |
664 | KUNIT_ASSERT_EQ(test, ret, 0); | |
665 | ||
666 | new_parent = clk_get_parent(clk); | |
667 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); | |
668 | KUNIT_EXPECT_TRUE(test, clk_is_match(parent, new_parent)); | |
669 | ||
670 | clk_put(parent); | |
671 | clk_put(clk); | |
672 | } | |
673 | ||
cb1b1dd9 MR |
674 | /* |
675 | * Test that, for a mux that started orphan but got switched to a valid | |
676 | * parent, calling clk_drop_range() on the mux won't affect the parent | |
677 | * rate. | |
678 | */ | |
679 | static void | |
680 | clk_test_orphan_transparent_multiple_parent_mux_set_parent_drop_range(struct kunit *test) | |
681 | { | |
682 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
683 | struct clk_hw *hw = &ctx->hw; | |
684 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
685 | struct clk *parent; | |
686 | unsigned long parent_rate, new_parent_rate; | |
687 | int ret; | |
688 | ||
689 | parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL); | |
690 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); | |
691 | ||
692 | parent_rate = clk_get_rate(parent); | |
693 | KUNIT_ASSERT_GT(test, parent_rate, 0); | |
694 | ||
695 | ret = clk_set_parent(clk, parent); | |
696 | KUNIT_ASSERT_EQ(test, ret, 0); | |
697 | ||
698 | ret = clk_drop_range(clk); | |
699 | KUNIT_ASSERT_EQ(test, ret, 0); | |
700 | ||
701 | new_parent_rate = clk_get_rate(clk); | |
702 | KUNIT_ASSERT_GT(test, new_parent_rate, 0); | |
703 | KUNIT_EXPECT_EQ(test, parent_rate, new_parent_rate); | |
704 | ||
705 | clk_put(parent); | |
706 | clk_put(clk); | |
707 | } | |
708 | ||
2e9cad1a MR |
709 | /* |
710 | * Test that, for a mux that started orphan but got switched to a valid | |
711 | * parent, the rate of the mux and its new parent are consistent. | |
712 | */ | |
713 | static void | |
714 | clk_test_orphan_transparent_multiple_parent_mux_set_parent_get_rate(struct kunit *test) | |
715 | { | |
716 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
717 | struct clk_hw *hw = &ctx->hw; | |
718 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
719 | struct clk *parent; | |
720 | unsigned long parent_rate, rate; | |
721 | int ret; | |
722 | ||
723 | parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL); | |
724 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); | |
725 | ||
726 | parent_rate = clk_get_rate(parent); | |
727 | KUNIT_ASSERT_GT(test, parent_rate, 0); | |
728 | ||
729 | ret = clk_set_parent(clk, parent); | |
730 | KUNIT_ASSERT_EQ(test, ret, 0); | |
731 | ||
732 | rate = clk_get_rate(clk); | |
733 | KUNIT_ASSERT_GT(test, rate, 0); | |
734 | KUNIT_EXPECT_EQ(test, parent_rate, rate); | |
735 | ||
736 | clk_put(parent); | |
737 | clk_put(clk); | |
738 | } | |
739 | ||
cb1b1dd9 MR |
740 | /* |
741 | * Test that, for a mux that started orphan but got switched to a valid | |
742 | * parent, calling clk_put() on the mux won't affect the parent rate. | |
743 | */ | |
744 | static void | |
745 | clk_test_orphan_transparent_multiple_parent_mux_set_parent_put(struct kunit *test) | |
746 | { | |
747 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
748 | struct clk *clk, *parent; | |
749 | unsigned long parent_rate, new_parent_rate; | |
750 | int ret; | |
751 | ||
752 | parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL); | |
753 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); | |
754 | ||
755 | clk = clk_hw_get_clk(&ctx->hw, NULL); | |
756 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, clk); | |
757 | ||
758 | parent_rate = clk_get_rate(parent); | |
759 | KUNIT_ASSERT_GT(test, parent_rate, 0); | |
760 | ||
761 | ret = clk_set_parent(clk, parent); | |
762 | KUNIT_ASSERT_EQ(test, ret, 0); | |
763 | ||
764 | clk_put(clk); | |
765 | ||
766 | new_parent_rate = clk_get_rate(parent); | |
767 | KUNIT_ASSERT_GT(test, new_parent_rate, 0); | |
768 | KUNIT_EXPECT_EQ(test, parent_rate, new_parent_rate); | |
769 | ||
770 | clk_put(parent); | |
771 | } | |
772 | ||
2e9cad1a MR |
773 | /* |
774 | * Test that, for a mux that started orphan but got switched to a valid | |
775 | * parent, calling clk_set_rate_range() will affect the parent state if | |
776 | * its rate is out of range. | |
777 | */ | |
778 | static void | |
779 | clk_test_orphan_transparent_multiple_parent_mux_set_parent_set_range_modified(struct kunit *test) | |
780 | { | |
781 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
782 | struct clk_hw *hw = &ctx->hw; | |
783 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
784 | struct clk *parent; | |
785 | unsigned long rate; | |
786 | int ret; | |
787 | ||
788 | parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL); | |
789 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); | |
790 | ||
791 | ret = clk_set_parent(clk, parent); | |
792 | KUNIT_ASSERT_EQ(test, ret, 0); | |
793 | ||
794 | ret = clk_set_rate_range(clk, DUMMY_CLOCK_RATE_1, DUMMY_CLOCK_RATE_2); | |
795 | KUNIT_ASSERT_EQ(test, ret, 0); | |
796 | ||
797 | rate = clk_get_rate(clk); | |
798 | KUNIT_ASSERT_GT(test, rate, 0); | |
799 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1); | |
800 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2); | |
801 | ||
802 | clk_put(parent); | |
803 | clk_put(clk); | |
804 | } | |
805 | ||
cb1b1dd9 MR |
806 | /* |
807 | * Test that, for a mux that started orphan but got switched to a valid | |
808 | * parent, calling clk_set_rate_range() won't affect the parent state if | |
809 | * its rate is within range. | |
810 | */ | |
811 | static void | |
812 | clk_test_orphan_transparent_multiple_parent_mux_set_parent_set_range_untouched(struct kunit *test) | |
813 | { | |
814 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
815 | struct clk_hw *hw = &ctx->hw; | |
816 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
817 | struct clk *parent; | |
818 | unsigned long parent_rate, new_parent_rate; | |
819 | int ret; | |
820 | ||
821 | parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL); | |
822 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); | |
823 | ||
824 | parent_rate = clk_get_rate(parent); | |
825 | KUNIT_ASSERT_GT(test, parent_rate, 0); | |
826 | ||
827 | ret = clk_set_parent(clk, parent); | |
828 | KUNIT_ASSERT_EQ(test, ret, 0); | |
829 | ||
830 | ret = clk_set_rate_range(clk, | |
831 | DUMMY_CLOCK_INIT_RATE - 1000, | |
832 | DUMMY_CLOCK_INIT_RATE + 1000); | |
833 | KUNIT_ASSERT_EQ(test, ret, 0); | |
834 | ||
835 | new_parent_rate = clk_get_rate(parent); | |
836 | KUNIT_ASSERT_GT(test, new_parent_rate, 0); | |
837 | KUNIT_EXPECT_EQ(test, parent_rate, new_parent_rate); | |
838 | ||
839 | clk_put(parent); | |
840 | clk_put(clk); | |
841 | } | |
842 | ||
2e9cad1a MR |
843 | /* |
844 | * Test that, for a mux whose current parent hasn't been registered yet, | |
845 | * calling clk_set_rate_range() will succeed, and will be taken into | |
846 | * account when rounding a rate. | |
847 | */ | |
848 | static void | |
849 | clk_test_orphan_transparent_multiple_parent_mux_set_range_round_rate(struct kunit *test) | |
850 | { | |
851 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
852 | struct clk_hw *hw = &ctx->hw; | |
853 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
854 | unsigned long rate; | |
855 | int ret; | |
856 | ||
857 | ret = clk_set_rate_range(clk, DUMMY_CLOCK_RATE_1, DUMMY_CLOCK_RATE_2); | |
858 | KUNIT_ASSERT_EQ(test, ret, 0); | |
859 | ||
860 | rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_1 - 1000); | |
861 | KUNIT_ASSERT_GT(test, rate, 0); | |
862 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1); | |
863 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2); | |
864 | ||
865 | clk_put(clk); | |
866 | } | |
867 | ||
868 | /* | |
869 | * Test that, for a mux that started orphan, was assigned and rate and | |
870 | * then got switched to a valid parent, its rate is eventually within | |
871 | * range. | |
872 | * | |
873 | * FIXME: Even though we update the rate as part of clk_set_parent(), we | |
874 | * don't evaluate whether that new rate is within range and needs to be | |
875 | * adjusted. | |
876 | */ | |
877 | static void | |
878 | clk_test_orphan_transparent_multiple_parent_mux_set_range_set_parent_get_rate(struct kunit *test) | |
879 | { | |
880 | struct clk_multiple_parent_ctx *ctx = test->priv; | |
881 | struct clk_hw *hw = &ctx->hw; | |
882 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
883 | struct clk *parent; | |
884 | unsigned long rate; | |
885 | int ret; | |
886 | ||
887 | kunit_skip(test, "This needs to be fixed in the core."); | |
888 | ||
889 | clk_hw_set_rate_range(hw, DUMMY_CLOCK_RATE_1, DUMMY_CLOCK_RATE_2); | |
890 | ||
891 | parent = clk_hw_get_clk(&ctx->parents_ctx[1].hw, NULL); | |
892 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, parent); | |
893 | ||
894 | ret = clk_set_parent(clk, parent); | |
895 | KUNIT_ASSERT_EQ(test, ret, 0); | |
896 | ||
897 | rate = clk_get_rate(clk); | |
898 | KUNIT_ASSERT_GT(test, rate, 0); | |
899 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1); | |
900 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2); | |
901 | ||
902 | clk_put(parent); | |
903 | clk_put(clk); | |
904 | } | |
905 | ||
906 | static struct kunit_case clk_orphan_transparent_multiple_parent_mux_test_cases[] = { | |
907 | KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_get_parent), | |
908 | KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_parent), | |
cb1b1dd9 | 909 | KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_parent_drop_range), |
2e9cad1a | 910 | KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_parent_get_rate), |
cb1b1dd9 | 911 | KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_parent_put), |
2e9cad1a | 912 | KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_parent_set_range_modified), |
cb1b1dd9 | 913 | KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_parent_set_range_untouched), |
2e9cad1a MR |
914 | KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_range_round_rate), |
915 | KUNIT_CASE(clk_test_orphan_transparent_multiple_parent_mux_set_range_set_parent_get_rate), | |
916 | {} | |
917 | }; | |
918 | ||
919 | /* | |
920 | * Test suite for a basic mux clock with two parents. The default parent | |
921 | * isn't registered, only the second parent is. By default, the clock | |
922 | * will thus be orphan. | |
923 | * | |
924 | * These tests exercise the behaviour of the consumer API when dealing | |
925 | * with an orphan clock, and how we deal with the transition to a valid | |
926 | * parent. | |
927 | */ | |
928 | static struct kunit_suite clk_orphan_transparent_multiple_parent_mux_test_suite = { | |
929 | .name = "clk-orphan-transparent-multiple-parent-mux-test", | |
930 | .init = clk_orphan_transparent_multiple_parent_mux_test_init, | |
931 | .exit = clk_orphan_transparent_multiple_parent_mux_test_exit, | |
932 | .test_cases = clk_orphan_transparent_multiple_parent_mux_test_cases, | |
933 | }; | |
934 | ||
481f541c MR |
935 | struct clk_single_parent_ctx { |
936 | struct clk_dummy_context parent_ctx; | |
937 | struct clk_hw hw; | |
938 | }; | |
939 | ||
02cdeace MR |
940 | static int clk_single_parent_mux_test_init(struct kunit *test) |
941 | { | |
942 | struct clk_single_parent_ctx *ctx; | |
943 | int ret; | |
944 | ||
945 | ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); | |
946 | if (!ctx) | |
947 | return -ENOMEM; | |
948 | test->priv = ctx; | |
949 | ||
950 | ctx->parent_ctx.rate = DUMMY_CLOCK_INIT_RATE; | |
951 | ctx->parent_ctx.hw.init = | |
952 | CLK_HW_INIT_NO_PARENT("parent-clk", | |
953 | &clk_dummy_rate_ops, | |
954 | 0); | |
955 | ||
956 | ret = clk_hw_register(NULL, &ctx->parent_ctx.hw); | |
957 | if (ret) | |
958 | return ret; | |
959 | ||
960 | ctx->hw.init = CLK_HW_INIT("test-clk", "parent-clk", | |
961 | &clk_dummy_single_parent_ops, | |
962 | CLK_SET_RATE_PARENT); | |
963 | ||
964 | ret = clk_hw_register(NULL, &ctx->hw); | |
965 | if (ret) | |
966 | return ret; | |
967 | ||
968 | return 0; | |
969 | } | |
970 | ||
971 | static void | |
972 | clk_single_parent_mux_test_exit(struct kunit *test) | |
973 | { | |
974 | struct clk_single_parent_ctx *ctx = test->priv; | |
975 | ||
976 | clk_hw_unregister(&ctx->hw); | |
977 | clk_hw_unregister(&ctx->parent_ctx.hw); | |
978 | } | |
979 | ||
980 | /* | |
981 | * Test that for a clock with a single parent, clk_get_parent() actually | |
982 | * returns the parent. | |
983 | */ | |
984 | static void | |
985 | clk_test_single_parent_mux_get_parent(struct kunit *test) | |
986 | { | |
987 | struct clk_single_parent_ctx *ctx = test->priv; | |
988 | struct clk_hw *hw = &ctx->hw; | |
989 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
990 | struct clk *parent = clk_hw_get_clk(&ctx->parent_ctx.hw, NULL); | |
991 | ||
992 | KUNIT_EXPECT_TRUE(test, clk_is_match(clk_get_parent(clk), parent)); | |
993 | ||
994 | clk_put(parent); | |
995 | clk_put(clk); | |
996 | } | |
997 | ||
1234a2c4 MR |
998 | /* |
999 | * Test that for a clock with a single parent, clk_has_parent() actually | |
1000 | * reports it as a parent. | |
1001 | */ | |
1002 | static void | |
1003 | clk_test_single_parent_mux_has_parent(struct kunit *test) | |
1004 | { | |
1005 | struct clk_single_parent_ctx *ctx = test->priv; | |
1006 | struct clk_hw *hw = &ctx->hw; | |
1007 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
1008 | struct clk *parent = clk_hw_get_clk(&ctx->parent_ctx.hw, NULL); | |
1009 | ||
1010 | KUNIT_EXPECT_TRUE(test, clk_has_parent(clk, parent)); | |
1011 | ||
1012 | clk_put(parent); | |
1013 | clk_put(clk); | |
1014 | } | |
1015 | ||
02cdeace MR |
1016 | /* |
1017 | * Test that for a clock that can't modify its rate and with a single | |
1018 | * parent, if we set disjoints range on the parent and then the child, | |
1019 | * the second will return an error. | |
1020 | * | |
1021 | * FIXME: clk_set_rate_range() only considers the current clock when | |
1022 | * evaluating whether ranges are disjoints and not the upstream clocks | |
1023 | * ranges. | |
1024 | */ | |
1025 | static void | |
1026 | clk_test_single_parent_mux_set_range_disjoint_child_last(struct kunit *test) | |
1027 | { | |
1028 | struct clk_single_parent_ctx *ctx = test->priv; | |
1029 | struct clk_hw *hw = &ctx->hw; | |
1030 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
1031 | struct clk *parent; | |
1032 | int ret; | |
1033 | ||
1034 | kunit_skip(test, "This needs to be fixed in the core."); | |
1035 | ||
1036 | parent = clk_get_parent(clk); | |
1037 | KUNIT_ASSERT_PTR_NE(test, parent, NULL); | |
1038 | ||
1039 | ret = clk_set_rate_range(parent, 1000, 2000); | |
1040 | KUNIT_ASSERT_EQ(test, ret, 0); | |
1041 | ||
1042 | ret = clk_set_rate_range(clk, 3000, 4000); | |
1043 | KUNIT_EXPECT_LT(test, ret, 0); | |
1044 | ||
1045 | clk_put(clk); | |
1046 | } | |
1047 | ||
1048 | /* | |
1049 | * Test that for a clock that can't modify its rate and with a single | |
1050 | * parent, if we set disjoints range on the child and then the parent, | |
1051 | * the second will return an error. | |
1052 | * | |
1053 | * FIXME: clk_set_rate_range() only considers the current clock when | |
1054 | * evaluating whether ranges are disjoints and not the downstream clocks | |
1055 | * ranges. | |
1056 | */ | |
1057 | static void | |
1058 | clk_test_single_parent_mux_set_range_disjoint_parent_last(struct kunit *test) | |
1059 | { | |
1060 | struct clk_single_parent_ctx *ctx = test->priv; | |
1061 | struct clk_hw *hw = &ctx->hw; | |
1062 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
1063 | struct clk *parent; | |
1064 | int ret; | |
1065 | ||
1066 | kunit_skip(test, "This needs to be fixed in the core."); | |
1067 | ||
1068 | parent = clk_get_parent(clk); | |
1069 | KUNIT_ASSERT_PTR_NE(test, parent, NULL); | |
1070 | ||
1071 | ret = clk_set_rate_range(clk, 1000, 2000); | |
1072 | KUNIT_ASSERT_EQ(test, ret, 0); | |
1073 | ||
1074 | ret = clk_set_rate_range(parent, 3000, 4000); | |
1075 | KUNIT_EXPECT_LT(test, ret, 0); | |
1076 | ||
1077 | clk_put(clk); | |
1078 | } | |
1079 | ||
262ca38f MR |
1080 | /* |
1081 | * Test that for a clock that can't modify its rate and with a single | |
1082 | * parent, if we set a range on the parent and then call | |
1083 | * clk_round_rate(), the boundaries of the parent are taken into | |
1084 | * account. | |
1085 | */ | |
1086 | static void | |
1087 | clk_test_single_parent_mux_set_range_round_rate_parent_only(struct kunit *test) | |
1088 | { | |
1089 | struct clk_single_parent_ctx *ctx = test->priv; | |
1090 | struct clk_hw *hw = &ctx->hw; | |
1091 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
1092 | struct clk *parent; | |
1093 | unsigned long rate; | |
1094 | int ret; | |
1095 | ||
1096 | parent = clk_get_parent(clk); | |
1097 | KUNIT_ASSERT_PTR_NE(test, parent, NULL); | |
1098 | ||
1099 | ret = clk_set_rate_range(parent, DUMMY_CLOCK_RATE_1, DUMMY_CLOCK_RATE_2); | |
1100 | KUNIT_ASSERT_EQ(test, ret, 0); | |
1101 | ||
1102 | rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_1 - 1000); | |
1103 | KUNIT_ASSERT_GT(test, rate, 0); | |
1104 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1); | |
1105 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2); | |
1106 | ||
1107 | clk_put(clk); | |
1108 | } | |
1109 | ||
02cdeace MR |
1110 | /* |
1111 | * Test that for a clock that can't modify its rate and with a single | |
1112 | * parent, if we set a range on the parent and a more restrictive one on | |
1113 | * the child, and then call clk_round_rate(), the boundaries of the | |
1114 | * two clocks are taken into account. | |
1115 | */ | |
1116 | static void | |
1117 | clk_test_single_parent_mux_set_range_round_rate_child_smaller(struct kunit *test) | |
1118 | { | |
1119 | struct clk_single_parent_ctx *ctx = test->priv; | |
1120 | struct clk_hw *hw = &ctx->hw; | |
1121 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
1122 | struct clk *parent; | |
1123 | unsigned long rate; | |
1124 | int ret; | |
1125 | ||
1126 | parent = clk_get_parent(clk); | |
1127 | KUNIT_ASSERT_PTR_NE(test, parent, NULL); | |
1128 | ||
1129 | ret = clk_set_rate_range(parent, DUMMY_CLOCK_RATE_1, DUMMY_CLOCK_RATE_2); | |
1130 | KUNIT_ASSERT_EQ(test, ret, 0); | |
1131 | ||
1132 | ret = clk_set_rate_range(clk, DUMMY_CLOCK_RATE_1 + 1000, DUMMY_CLOCK_RATE_2 - 1000); | |
1133 | KUNIT_ASSERT_EQ(test, ret, 0); | |
1134 | ||
1135 | rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_1 - 1000); | |
1136 | KUNIT_ASSERT_GT(test, rate, 0); | |
1137 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1 + 1000); | |
1138 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2 - 1000); | |
1139 | ||
1140 | rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_2 + 1000); | |
1141 | KUNIT_ASSERT_GT(test, rate, 0); | |
1142 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1 + 1000); | |
1143 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2 - 1000); | |
1144 | ||
1145 | clk_put(clk); | |
1146 | } | |
1147 | ||
262ca38f MR |
1148 | /* |
1149 | * Test that for a clock that can't modify its rate and with a single | |
1150 | * parent, if we set a range on the child and a more restrictive one on | |
1151 | * the parent, and then call clk_round_rate(), the boundaries of the | |
1152 | * two clocks are taken into account. | |
1153 | */ | |
1154 | static void | |
1155 | clk_test_single_parent_mux_set_range_round_rate_parent_smaller(struct kunit *test) | |
1156 | { | |
1157 | struct clk_single_parent_ctx *ctx = test->priv; | |
1158 | struct clk_hw *hw = &ctx->hw; | |
1159 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
1160 | struct clk *parent; | |
1161 | unsigned long rate; | |
1162 | int ret; | |
1163 | ||
1164 | parent = clk_get_parent(clk); | |
1165 | KUNIT_ASSERT_PTR_NE(test, parent, NULL); | |
1166 | ||
1167 | ret = clk_set_rate_range(parent, DUMMY_CLOCK_RATE_1 + 1000, DUMMY_CLOCK_RATE_2 - 1000); | |
1168 | KUNIT_ASSERT_EQ(test, ret, 0); | |
1169 | ||
1170 | ret = clk_set_rate_range(clk, DUMMY_CLOCK_RATE_1, DUMMY_CLOCK_RATE_2); | |
1171 | KUNIT_ASSERT_EQ(test, ret, 0); | |
1172 | ||
1173 | rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_1 - 1000); | |
1174 | KUNIT_ASSERT_GT(test, rate, 0); | |
1175 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1 + 1000); | |
1176 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2 - 1000); | |
1177 | ||
1178 | rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_2 + 1000); | |
1179 | KUNIT_ASSERT_GT(test, rate, 0); | |
1180 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1 + 1000); | |
1181 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2 - 1000); | |
1182 | ||
1183 | clk_put(clk); | |
1184 | } | |
1185 | ||
02cdeace MR |
1186 | static struct kunit_case clk_single_parent_mux_test_cases[] = { |
1187 | KUNIT_CASE(clk_test_single_parent_mux_get_parent), | |
1234a2c4 | 1188 | KUNIT_CASE(clk_test_single_parent_mux_has_parent), |
02cdeace MR |
1189 | KUNIT_CASE(clk_test_single_parent_mux_set_range_disjoint_child_last), |
1190 | KUNIT_CASE(clk_test_single_parent_mux_set_range_disjoint_parent_last), | |
1191 | KUNIT_CASE(clk_test_single_parent_mux_set_range_round_rate_child_smaller), | |
262ca38f MR |
1192 | KUNIT_CASE(clk_test_single_parent_mux_set_range_round_rate_parent_only), |
1193 | KUNIT_CASE(clk_test_single_parent_mux_set_range_round_rate_parent_smaller), | |
02cdeace MR |
1194 | {} |
1195 | }; | |
1196 | ||
1197 | /* | |
1198 | * Test suite for a basic mux clock with one parent, with | |
1199 | * CLK_SET_RATE_PARENT on the child. | |
1200 | * | |
1201 | * These tests exercise the consumer API and check that the state of the | |
1202 | * child and parent are sane and consistent. | |
1203 | */ | |
1204 | static struct kunit_suite | |
1205 | clk_single_parent_mux_test_suite = { | |
1206 | .name = "clk-single-parent-mux-test", | |
1207 | .init = clk_single_parent_mux_test_init, | |
1208 | .exit = clk_single_parent_mux_test_exit, | |
1209 | .test_cases = clk_single_parent_mux_test_cases, | |
1210 | }; | |
1211 | ||
481f541c MR |
1212 | static int clk_orphan_transparent_single_parent_mux_test_init(struct kunit *test) |
1213 | { | |
1214 | struct clk_single_parent_ctx *ctx; | |
1215 | struct clk_init_data init = { }; | |
1216 | const char * const parents[] = { "orphan_parent" }; | |
1217 | int ret; | |
1218 | ||
1219 | ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); | |
1220 | if (!ctx) | |
1221 | return -ENOMEM; | |
1222 | test->priv = ctx; | |
1223 | ||
1224 | init.name = "test_orphan_dummy_parent"; | |
1225 | init.ops = &clk_dummy_single_parent_ops; | |
1226 | init.parent_names = parents; | |
1227 | init.num_parents = ARRAY_SIZE(parents); | |
1228 | init.flags = CLK_SET_RATE_PARENT; | |
1229 | ctx->hw.init = &init; | |
1230 | ||
1231 | ret = clk_hw_register(NULL, &ctx->hw); | |
1232 | if (ret) | |
1233 | return ret; | |
1234 | ||
1235 | memset(&init, 0, sizeof(init)); | |
1236 | init.name = "orphan_parent"; | |
1237 | init.ops = &clk_dummy_rate_ops; | |
1238 | ctx->parent_ctx.hw.init = &init; | |
1239 | ctx->parent_ctx.rate = DUMMY_CLOCK_INIT_RATE; | |
1240 | ||
1241 | ret = clk_hw_register(NULL, &ctx->parent_ctx.hw); | |
1242 | if (ret) | |
1243 | return ret; | |
1244 | ||
1245 | return 0; | |
1246 | } | |
1247 | ||
481f541c MR |
1248 | /* |
1249 | * Test that a mux-only clock, with an initial rate within a range, | |
1250 | * will still have the same rate after the range has been enforced. | |
7d79c26b MR |
1251 | * |
1252 | * See: | |
1253 | * https://lore.kernel.org/linux-clk/7720158d-10a7-a17b-73a4-a8615c9c6d5c@collabora.com/ | |
481f541c MR |
1254 | */ |
1255 | static void clk_test_orphan_transparent_parent_mux_set_range(struct kunit *test) | |
1256 | { | |
1257 | struct clk_single_parent_ctx *ctx = test->priv; | |
1258 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1259 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
481f541c MR |
1260 | unsigned long rate, new_rate; |
1261 | ||
1262 | rate = clk_get_rate(clk); | |
1263 | KUNIT_ASSERT_GT(test, rate, 0); | |
1264 | ||
1265 | KUNIT_ASSERT_EQ(test, | |
1266 | clk_set_rate_range(clk, | |
1267 | ctx->parent_ctx.rate - 1000, | |
1268 | ctx->parent_ctx.rate + 1000), | |
1269 | 0); | |
1270 | ||
1271 | new_rate = clk_get_rate(clk); | |
1272 | KUNIT_ASSERT_GT(test, new_rate, 0); | |
1273 | KUNIT_EXPECT_EQ(test, rate, new_rate); | |
aac00c7f MR |
1274 | |
1275 | clk_put(clk); | |
481f541c MR |
1276 | } |
1277 | ||
1278 | static struct kunit_case clk_orphan_transparent_single_parent_mux_test_cases[] = { | |
1279 | KUNIT_CASE(clk_test_orphan_transparent_parent_mux_set_range), | |
1280 | {} | |
1281 | }; | |
1282 | ||
090962b6 MR |
1283 | /* |
1284 | * Test suite for a basic mux clock with one parent. The parent is | |
1285 | * registered after its child. The clock will thus be an orphan when | |
1286 | * registered, but will no longer be when the tests run. | |
1287 | * | |
1288 | * These tests make sure a clock that used to be orphan has a sane, | |
1289 | * consistent, behaviour. | |
1290 | */ | |
481f541c MR |
1291 | static struct kunit_suite clk_orphan_transparent_single_parent_test_suite = { |
1292 | .name = "clk-orphan-transparent-single-parent-test", | |
1293 | .init = clk_orphan_transparent_single_parent_mux_test_init, | |
02cdeace | 1294 | .exit = clk_single_parent_mux_test_exit, |
481f541c MR |
1295 | .test_cases = clk_orphan_transparent_single_parent_mux_test_cases, |
1296 | }; | |
1297 | ||
cb1b1dd9 MR |
1298 | struct clk_single_parent_two_lvl_ctx { |
1299 | struct clk_dummy_context parent_parent_ctx; | |
1300 | struct clk_dummy_context parent_ctx; | |
1301 | struct clk_hw hw; | |
1302 | }; | |
1303 | ||
1304 | static int | |
1305 | clk_orphan_two_level_root_last_test_init(struct kunit *test) | |
1306 | { | |
1307 | struct clk_single_parent_two_lvl_ctx *ctx; | |
1308 | int ret; | |
1309 | ||
1310 | ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); | |
1311 | if (!ctx) | |
1312 | return -ENOMEM; | |
1313 | test->priv = ctx; | |
1314 | ||
1315 | ctx->parent_ctx.hw.init = | |
1316 | CLK_HW_INIT("intermediate-parent", | |
1317 | "root-parent", | |
1318 | &clk_dummy_single_parent_ops, | |
1319 | CLK_SET_RATE_PARENT); | |
1320 | ret = clk_hw_register(NULL, &ctx->parent_ctx.hw); | |
1321 | if (ret) | |
1322 | return ret; | |
1323 | ||
1324 | ctx->hw.init = | |
1325 | CLK_HW_INIT("test-clk", "intermediate-parent", | |
1326 | &clk_dummy_single_parent_ops, | |
1327 | CLK_SET_RATE_PARENT); | |
1328 | ret = clk_hw_register(NULL, &ctx->hw); | |
1329 | if (ret) | |
1330 | return ret; | |
1331 | ||
1332 | ctx->parent_parent_ctx.rate = DUMMY_CLOCK_INIT_RATE; | |
1333 | ctx->parent_parent_ctx.hw.init = | |
1334 | CLK_HW_INIT_NO_PARENT("root-parent", | |
1335 | &clk_dummy_rate_ops, | |
1336 | 0); | |
1337 | ret = clk_hw_register(NULL, &ctx->parent_parent_ctx.hw); | |
1338 | if (ret) | |
1339 | return ret; | |
1340 | ||
1341 | return 0; | |
1342 | } | |
1343 | ||
1344 | static void | |
1345 | clk_orphan_two_level_root_last_test_exit(struct kunit *test) | |
1346 | { | |
1347 | struct clk_single_parent_two_lvl_ctx *ctx = test->priv; | |
1348 | ||
1349 | clk_hw_unregister(&ctx->hw); | |
1350 | clk_hw_unregister(&ctx->parent_ctx.hw); | |
1351 | clk_hw_unregister(&ctx->parent_parent_ctx.hw); | |
1352 | } | |
1353 | ||
1354 | /* | |
1355 | * Test that, for a clock whose parent used to be orphan, clk_get_rate() | |
1356 | * will return the proper rate. | |
1357 | */ | |
1358 | static void | |
1359 | clk_orphan_two_level_root_last_test_get_rate(struct kunit *test) | |
1360 | { | |
1361 | struct clk_single_parent_two_lvl_ctx *ctx = test->priv; | |
1362 | struct clk_hw *hw = &ctx->hw; | |
1363 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
1364 | unsigned long rate; | |
1365 | ||
1366 | rate = clk_get_rate(clk); | |
1367 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_INIT_RATE); | |
1368 | ||
1369 | clk_put(clk); | |
1370 | } | |
1371 | ||
1372 | /* | |
1373 | * Test that, for a clock whose parent used to be orphan, | |
1374 | * clk_set_rate_range() won't affect its rate if it is already within | |
1375 | * range. | |
1376 | * | |
1377 | * See (for Exynos 4210): | |
1378 | * https://lore.kernel.org/linux-clk/366a0232-bb4a-c357-6aa8-636e398e05eb@samsung.com/ | |
1379 | */ | |
1380 | static void | |
1381 | clk_orphan_two_level_root_last_test_set_range(struct kunit *test) | |
1382 | { | |
1383 | struct clk_single_parent_two_lvl_ctx *ctx = test->priv; | |
1384 | struct clk_hw *hw = &ctx->hw; | |
1385 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
1386 | unsigned long rate; | |
1387 | int ret; | |
1388 | ||
1389 | ret = clk_set_rate_range(clk, | |
1390 | DUMMY_CLOCK_INIT_RATE - 1000, | |
1391 | DUMMY_CLOCK_INIT_RATE + 1000); | |
1392 | KUNIT_ASSERT_EQ(test, ret, 0); | |
1393 | ||
1394 | rate = clk_get_rate(clk); | |
1395 | KUNIT_ASSERT_GT(test, rate, 0); | |
1396 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_INIT_RATE); | |
1397 | ||
1398 | clk_put(clk); | |
1399 | } | |
1400 | ||
1401 | static struct kunit_case | |
1402 | clk_orphan_two_level_root_last_test_cases[] = { | |
1403 | KUNIT_CASE(clk_orphan_two_level_root_last_test_get_rate), | |
1404 | KUNIT_CASE(clk_orphan_two_level_root_last_test_set_range), | |
1405 | {} | |
1406 | }; | |
1407 | ||
1408 | /* | |
1409 | * Test suite for a basic, transparent, clock with a parent that is also | |
1410 | * such a clock. The parent's parent is registered last, while the | |
1411 | * parent and its child are registered in that order. The intermediate | |
1412 | * and leaf clocks will thus be orphan when registered, but the leaf | |
1413 | * clock itself will always have its parent and will never be | |
1414 | * reparented. Indeed, it's only orphan because its parent is. | |
1415 | * | |
1416 | * These tests exercise the behaviour of the consumer API when dealing | |
1417 | * with an orphan clock, and how we deal with the transition to a valid | |
1418 | * parent. | |
1419 | */ | |
1420 | static struct kunit_suite | |
1421 | clk_orphan_two_level_root_last_test_suite = { | |
1422 | .name = "clk-orphan-two-level-root-last-test", | |
1423 | .init = clk_orphan_two_level_root_last_test_init, | |
1424 | .exit = clk_orphan_two_level_root_last_test_exit, | |
1425 | .test_cases = clk_orphan_two_level_root_last_test_cases, | |
1426 | }; | |
1427 | ||
723d0530 MR |
1428 | /* |
1429 | * Test that clk_set_rate_range won't return an error for a valid range | |
1430 | * and that it will make sure the rate of the clock is within the | |
1431 | * boundaries. | |
1432 | */ | |
1433 | static void clk_range_test_set_range(struct kunit *test) | |
1434 | { | |
1435 | struct clk_dummy_context *ctx = test->priv; | |
1436 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1437 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
1438 | unsigned long rate; |
1439 | ||
1440 | KUNIT_ASSERT_EQ(test, | |
1441 | clk_set_rate_range(clk, | |
1442 | DUMMY_CLOCK_RATE_1, | |
1443 | DUMMY_CLOCK_RATE_2), | |
1444 | 0); | |
1445 | ||
1446 | rate = clk_get_rate(clk); | |
1447 | KUNIT_ASSERT_GT(test, rate, 0); | |
1448 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1); | |
1449 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2); | |
aac00c7f MR |
1450 | |
1451 | clk_put(clk); | |
723d0530 MR |
1452 | } |
1453 | ||
1454 | /* | |
1455 | * Test that calling clk_set_rate_range with a minimum rate higher than | |
1456 | * the maximum rate returns an error. | |
1457 | */ | |
1458 | static void clk_range_test_set_range_invalid(struct kunit *test) | |
1459 | { | |
1460 | struct clk_dummy_context *ctx = test->priv; | |
1461 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1462 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
1463 | |
1464 | KUNIT_EXPECT_LT(test, | |
1465 | clk_set_rate_range(clk, | |
1466 | DUMMY_CLOCK_RATE_1 + 1000, | |
1467 | DUMMY_CLOCK_RATE_1), | |
1468 | 0); | |
aac00c7f MR |
1469 | |
1470 | clk_put(clk); | |
723d0530 MR |
1471 | } |
1472 | ||
1473 | /* | |
1474 | * Test that users can't set multiple, disjoints, range that would be | |
1475 | * impossible to meet. | |
1476 | */ | |
1477 | static void clk_range_test_multiple_disjoints_range(struct kunit *test) | |
1478 | { | |
1479 | struct clk_dummy_context *ctx = test->priv; | |
1480 | struct clk_hw *hw = &ctx->hw; | |
1481 | struct clk *user1, *user2; | |
1482 | ||
1483 | user1 = clk_hw_get_clk(hw, NULL); | |
1484 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user1); | |
1485 | ||
1486 | user2 = clk_hw_get_clk(hw, NULL); | |
1487 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user2); | |
1488 | ||
1489 | KUNIT_ASSERT_EQ(test, | |
1490 | clk_set_rate_range(user1, 1000, 2000), | |
1491 | 0); | |
1492 | ||
1493 | KUNIT_EXPECT_LT(test, | |
1494 | clk_set_rate_range(user2, 3000, 4000), | |
1495 | 0); | |
1496 | ||
1497 | clk_put(user2); | |
1498 | clk_put(user1); | |
1499 | } | |
1500 | ||
1501 | /* | |
1502 | * Test that if our clock has some boundaries and we try to round a rate | |
948fb096 | 1503 | * lower than the minimum, the returned rate will be within range. |
723d0530 MR |
1504 | */ |
1505 | static void clk_range_test_set_range_round_rate_lower(struct kunit *test) | |
1506 | { | |
1507 | struct clk_dummy_context *ctx = test->priv; | |
1508 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1509 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
1510 | long rate; |
1511 | ||
1512 | KUNIT_ASSERT_EQ(test, | |
1513 | clk_set_rate_range(clk, | |
1514 | DUMMY_CLOCK_RATE_1, | |
1515 | DUMMY_CLOCK_RATE_2), | |
1516 | 0); | |
1517 | ||
1518 | rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_1 - 1000); | |
1519 | KUNIT_ASSERT_GT(test, rate, 0); | |
948fb096 MR |
1520 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1); |
1521 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2); | |
aac00c7f MR |
1522 | |
1523 | clk_put(clk); | |
723d0530 MR |
1524 | } |
1525 | ||
1526 | /* | |
1527 | * Test that if our clock has some boundaries and we try to set a rate | |
948fb096 | 1528 | * higher than the maximum, the new rate will be within range. |
723d0530 MR |
1529 | */ |
1530 | static void clk_range_test_set_range_set_rate_lower(struct kunit *test) | |
1531 | { | |
1532 | struct clk_dummy_context *ctx = test->priv; | |
1533 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1534 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
948fb096 | 1535 | unsigned long rate; |
723d0530 MR |
1536 | |
1537 | KUNIT_ASSERT_EQ(test, | |
1538 | clk_set_rate_range(clk, | |
1539 | DUMMY_CLOCK_RATE_1, | |
1540 | DUMMY_CLOCK_RATE_2), | |
1541 | 0); | |
1542 | ||
948fb096 | 1543 | KUNIT_ASSERT_EQ(test, |
723d0530 MR |
1544 | clk_set_rate(clk, DUMMY_CLOCK_RATE_1 - 1000), |
1545 | 0); | |
948fb096 MR |
1546 | |
1547 | rate = clk_get_rate(clk); | |
1548 | KUNIT_ASSERT_GT(test, rate, 0); | |
1549 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1); | |
1550 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2); | |
aac00c7f MR |
1551 | |
1552 | clk_put(clk); | |
723d0530 MR |
1553 | } |
1554 | ||
1555 | /* | |
1556 | * Test that if our clock has some boundaries and we try to round and | |
948fb096 MR |
1557 | * set a rate lower than the minimum, the rate returned by |
1558 | * clk_round_rate() will be consistent with the new rate set by | |
1559 | * clk_set_rate(). | |
723d0530 MR |
1560 | */ |
1561 | static void clk_range_test_set_range_set_round_rate_consistent_lower(struct kunit *test) | |
1562 | { | |
1563 | struct clk_dummy_context *ctx = test->priv; | |
1564 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1565 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
1566 | long rounded; |
1567 | ||
1568 | KUNIT_ASSERT_EQ(test, | |
1569 | clk_set_rate_range(clk, | |
1570 | DUMMY_CLOCK_RATE_1, | |
1571 | DUMMY_CLOCK_RATE_2), | |
1572 | 0); | |
1573 | ||
1574 | rounded = clk_round_rate(clk, DUMMY_CLOCK_RATE_1 - 1000); | |
1575 | KUNIT_ASSERT_GT(test, rounded, 0); | |
1576 | ||
948fb096 | 1577 | KUNIT_ASSERT_EQ(test, |
723d0530 MR |
1578 | clk_set_rate(clk, DUMMY_CLOCK_RATE_1 - 1000), |
1579 | 0); | |
1580 | ||
948fb096 | 1581 | KUNIT_EXPECT_EQ(test, rounded, clk_get_rate(clk)); |
aac00c7f MR |
1582 | |
1583 | clk_put(clk); | |
723d0530 MR |
1584 | } |
1585 | ||
1586 | /* | |
1587 | * Test that if our clock has some boundaries and we try to round a rate | |
948fb096 | 1588 | * higher than the maximum, the returned rate will be within range. |
723d0530 MR |
1589 | */ |
1590 | static void clk_range_test_set_range_round_rate_higher(struct kunit *test) | |
1591 | { | |
1592 | struct clk_dummy_context *ctx = test->priv; | |
1593 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1594 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
1595 | long rate; |
1596 | ||
1597 | KUNIT_ASSERT_EQ(test, | |
1598 | clk_set_rate_range(clk, | |
1599 | DUMMY_CLOCK_RATE_1, | |
1600 | DUMMY_CLOCK_RATE_2), | |
1601 | 0); | |
1602 | ||
1603 | rate = clk_round_rate(clk, DUMMY_CLOCK_RATE_2 + 1000); | |
1604 | KUNIT_ASSERT_GT(test, rate, 0); | |
948fb096 MR |
1605 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1); |
1606 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2); | |
aac00c7f MR |
1607 | |
1608 | clk_put(clk); | |
723d0530 MR |
1609 | } |
1610 | ||
1611 | /* | |
1612 | * Test that if our clock has some boundaries and we try to set a rate | |
948fb096 | 1613 | * higher than the maximum, the new rate will be within range. |
723d0530 MR |
1614 | */ |
1615 | static void clk_range_test_set_range_set_rate_higher(struct kunit *test) | |
1616 | { | |
1617 | struct clk_dummy_context *ctx = test->priv; | |
1618 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1619 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
948fb096 | 1620 | unsigned long rate; |
723d0530 MR |
1621 | |
1622 | KUNIT_ASSERT_EQ(test, | |
1623 | clk_set_rate_range(clk, | |
1624 | DUMMY_CLOCK_RATE_1, | |
1625 | DUMMY_CLOCK_RATE_2), | |
1626 | 0); | |
1627 | ||
948fb096 | 1628 | KUNIT_ASSERT_EQ(test, |
723d0530 MR |
1629 | clk_set_rate(clk, DUMMY_CLOCK_RATE_2 + 1000), |
1630 | 0); | |
948fb096 MR |
1631 | |
1632 | rate = clk_get_rate(clk); | |
1633 | KUNIT_ASSERT_GT(test, rate, 0); | |
1634 | KUNIT_EXPECT_GE(test, rate, DUMMY_CLOCK_RATE_1); | |
1635 | KUNIT_EXPECT_LE(test, rate, DUMMY_CLOCK_RATE_2); | |
aac00c7f MR |
1636 | |
1637 | clk_put(clk); | |
723d0530 MR |
1638 | } |
1639 | ||
1640 | /* | |
1641 | * Test that if our clock has some boundaries and we try to round and | |
948fb096 MR |
1642 | * set a rate higher than the maximum, the rate returned by |
1643 | * clk_round_rate() will be consistent with the new rate set by | |
1644 | * clk_set_rate(). | |
723d0530 MR |
1645 | */ |
1646 | static void clk_range_test_set_range_set_round_rate_consistent_higher(struct kunit *test) | |
1647 | { | |
1648 | struct clk_dummy_context *ctx = test->priv; | |
1649 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1650 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
1651 | long rounded; |
1652 | ||
1653 | KUNIT_ASSERT_EQ(test, | |
1654 | clk_set_rate_range(clk, | |
1655 | DUMMY_CLOCK_RATE_1, | |
1656 | DUMMY_CLOCK_RATE_2), | |
1657 | 0); | |
1658 | ||
1659 | rounded = clk_round_rate(clk, DUMMY_CLOCK_RATE_2 + 1000); | |
1660 | KUNIT_ASSERT_GT(test, rounded, 0); | |
1661 | ||
948fb096 | 1662 | KUNIT_ASSERT_EQ(test, |
723d0530 MR |
1663 | clk_set_rate(clk, DUMMY_CLOCK_RATE_2 + 1000), |
1664 | 0); | |
1665 | ||
948fb096 | 1666 | KUNIT_EXPECT_EQ(test, rounded, clk_get_rate(clk)); |
aac00c7f MR |
1667 | |
1668 | clk_put(clk); | |
723d0530 MR |
1669 | } |
1670 | ||
1671 | /* | |
1672 | * Test that if our clock has a rate lower than the minimum set by a | |
1673 | * call to clk_set_rate_range(), the rate will be raised to match the | |
1674 | * new minimum. | |
1675 | * | |
1676 | * This assumes that clk_ops.determine_rate or clk_ops.round_rate won't | |
1677 | * modify the requested rate, which is our case in clk_dummy_rate_ops. | |
1678 | */ | |
1679 | static void clk_range_test_set_range_get_rate_raised(struct kunit *test) | |
1680 | { | |
1681 | struct clk_dummy_context *ctx = test->priv; | |
1682 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1683 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
1684 | unsigned long rate; |
1685 | ||
1686 | KUNIT_ASSERT_EQ(test, | |
1687 | clk_set_rate(clk, DUMMY_CLOCK_RATE_1 - 1000), | |
1688 | 0); | |
1689 | ||
1690 | KUNIT_ASSERT_EQ(test, | |
1691 | clk_set_rate_range(clk, | |
1692 | DUMMY_CLOCK_RATE_1, | |
1693 | DUMMY_CLOCK_RATE_2), | |
1694 | 0); | |
1695 | ||
1696 | rate = clk_get_rate(clk); | |
1697 | KUNIT_ASSERT_GT(test, rate, 0); | |
1698 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1); | |
aac00c7f MR |
1699 | |
1700 | clk_put(clk); | |
723d0530 MR |
1701 | } |
1702 | ||
1703 | /* | |
1704 | * Test that if our clock has a rate higher than the maximum set by a | |
1705 | * call to clk_set_rate_range(), the rate will be lowered to match the | |
1706 | * new maximum. | |
1707 | * | |
1708 | * This assumes that clk_ops.determine_rate or clk_ops.round_rate won't | |
1709 | * modify the requested rate, which is our case in clk_dummy_rate_ops. | |
1710 | */ | |
1711 | static void clk_range_test_set_range_get_rate_lowered(struct kunit *test) | |
1712 | { | |
1713 | struct clk_dummy_context *ctx = test->priv; | |
1714 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1715 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
1716 | unsigned long rate; |
1717 | ||
1718 | KUNIT_ASSERT_EQ(test, | |
1719 | clk_set_rate(clk, DUMMY_CLOCK_RATE_2 + 1000), | |
1720 | 0); | |
1721 | ||
1722 | KUNIT_ASSERT_EQ(test, | |
1723 | clk_set_rate_range(clk, | |
1724 | DUMMY_CLOCK_RATE_1, | |
1725 | DUMMY_CLOCK_RATE_2), | |
1726 | 0); | |
1727 | ||
1728 | rate = clk_get_rate(clk); | |
1729 | KUNIT_ASSERT_GT(test, rate, 0); | |
1730 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2); | |
aac00c7f MR |
1731 | |
1732 | clk_put(clk); | |
723d0530 MR |
1733 | } |
1734 | ||
1735 | static struct kunit_case clk_range_test_cases[] = { | |
1736 | KUNIT_CASE(clk_range_test_set_range), | |
1737 | KUNIT_CASE(clk_range_test_set_range_invalid), | |
1738 | KUNIT_CASE(clk_range_test_multiple_disjoints_range), | |
1739 | KUNIT_CASE(clk_range_test_set_range_round_rate_lower), | |
1740 | KUNIT_CASE(clk_range_test_set_range_set_rate_lower), | |
1741 | KUNIT_CASE(clk_range_test_set_range_set_round_rate_consistent_lower), | |
1742 | KUNIT_CASE(clk_range_test_set_range_round_rate_higher), | |
1743 | KUNIT_CASE(clk_range_test_set_range_set_rate_higher), | |
1744 | KUNIT_CASE(clk_range_test_set_range_set_round_rate_consistent_higher), | |
1745 | KUNIT_CASE(clk_range_test_set_range_get_rate_raised), | |
1746 | KUNIT_CASE(clk_range_test_set_range_get_rate_lowered), | |
1747 | {} | |
1748 | }; | |
1749 | ||
090962b6 MR |
1750 | /* |
1751 | * Test suite for a basic rate clock, without any parent. | |
1752 | * | |
1753 | * These tests exercise the rate range API: clk_set_rate_range(), | |
1754 | * clk_set_min_rate(), clk_set_max_rate(), clk_drop_range(). | |
1755 | */ | |
723d0530 MR |
1756 | static struct kunit_suite clk_range_test_suite = { |
1757 | .name = "clk-range-test", | |
1758 | .init = clk_test_init, | |
1759 | .exit = clk_test_exit, | |
1760 | .test_cases = clk_range_test_cases, | |
1761 | }; | |
1762 | ||
1763 | /* | |
c80ac50c MR |
1764 | * Test that if we have several subsequent calls to |
1765 | * clk_set_rate_range(), the core will reevaluate whether a new rate is | |
1766 | * needed each and every time. | |
723d0530 | 1767 | * |
c80ac50c MR |
1768 | * With clk_dummy_maximize_rate_ops, this means that the rate will |
1769 | * trail along the maximum as it evolves. | |
723d0530 MR |
1770 | */ |
1771 | static void clk_range_test_set_range_rate_maximized(struct kunit *test) | |
1772 | { | |
1773 | struct clk_dummy_context *ctx = test->priv; | |
1774 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1775 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
1776 | unsigned long rate; |
1777 | ||
1778 | KUNIT_ASSERT_EQ(test, | |
1779 | clk_set_rate(clk, DUMMY_CLOCK_RATE_2 + 1000), | |
1780 | 0); | |
1781 | ||
1782 | KUNIT_ASSERT_EQ(test, | |
1783 | clk_set_rate_range(clk, | |
1784 | DUMMY_CLOCK_RATE_1, | |
1785 | DUMMY_CLOCK_RATE_2), | |
1786 | 0); | |
1787 | ||
1788 | rate = clk_get_rate(clk); | |
1789 | KUNIT_ASSERT_GT(test, rate, 0); | |
1790 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2); | |
1791 | ||
1792 | KUNIT_ASSERT_EQ(test, | |
1793 | clk_set_rate_range(clk, | |
1794 | DUMMY_CLOCK_RATE_1, | |
1795 | DUMMY_CLOCK_RATE_2 - 1000), | |
1796 | 0); | |
1797 | ||
1798 | rate = clk_get_rate(clk); | |
1799 | KUNIT_ASSERT_GT(test, rate, 0); | |
1800 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2 - 1000); | |
1801 | ||
1802 | KUNIT_ASSERT_EQ(test, | |
1803 | clk_set_rate_range(clk, | |
1804 | DUMMY_CLOCK_RATE_1, | |
1805 | DUMMY_CLOCK_RATE_2), | |
1806 | 0); | |
1807 | ||
1808 | rate = clk_get_rate(clk); | |
1809 | KUNIT_ASSERT_GT(test, rate, 0); | |
c80ac50c | 1810 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2); |
aac00c7f MR |
1811 | |
1812 | clk_put(clk); | |
723d0530 MR |
1813 | } |
1814 | ||
1815 | /* | |
c80ac50c MR |
1816 | * Test that if we have several subsequent calls to |
1817 | * clk_set_rate_range(), across multiple users, the core will reevaluate | |
1818 | * whether a new rate is needed each and every time. | |
723d0530 | 1819 | * |
c80ac50c MR |
1820 | * With clk_dummy_maximize_rate_ops, this means that the rate will |
1821 | * trail along the maximum as it evolves. | |
723d0530 MR |
1822 | */ |
1823 | static void clk_range_test_multiple_set_range_rate_maximized(struct kunit *test) | |
1824 | { | |
1825 | struct clk_dummy_context *ctx = test->priv; | |
1826 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1827 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
1828 | struct clk *user1, *user2; |
1829 | unsigned long rate; | |
1830 | ||
1831 | user1 = clk_hw_get_clk(hw, NULL); | |
1832 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user1); | |
1833 | ||
1834 | user2 = clk_hw_get_clk(hw, NULL); | |
1835 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user2); | |
1836 | ||
1837 | KUNIT_ASSERT_EQ(test, | |
1838 | clk_set_rate(clk, DUMMY_CLOCK_RATE_2 + 1000), | |
1839 | 0); | |
1840 | ||
1841 | KUNIT_ASSERT_EQ(test, | |
1842 | clk_set_rate_range(user1, | |
1843 | 0, | |
1844 | DUMMY_CLOCK_RATE_2), | |
1845 | 0); | |
1846 | ||
1847 | rate = clk_get_rate(clk); | |
1848 | KUNIT_ASSERT_GT(test, rate, 0); | |
1849 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2); | |
1850 | ||
1851 | KUNIT_ASSERT_EQ(test, | |
1852 | clk_set_rate_range(user2, | |
1853 | 0, | |
1854 | DUMMY_CLOCK_RATE_1), | |
1855 | 0); | |
1856 | ||
1857 | rate = clk_get_rate(clk); | |
1858 | KUNIT_ASSERT_GT(test, rate, 0); | |
1859 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1); | |
1860 | ||
1861 | KUNIT_ASSERT_EQ(test, | |
c9744843 | 1862 | clk_drop_range(user2), |
723d0530 MR |
1863 | 0); |
1864 | ||
1865 | rate = clk_get_rate(clk); | |
1866 | KUNIT_ASSERT_GT(test, rate, 0); | |
c80ac50c | 1867 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2); |
723d0530 MR |
1868 | |
1869 | clk_put(user2); | |
1870 | clk_put(user1); | |
aac00c7f | 1871 | clk_put(clk); |
723d0530 MR |
1872 | } |
1873 | ||
d7738822 MR |
1874 | /* |
1875 | * Test that if we have several subsequent calls to | |
1876 | * clk_set_rate_range(), across multiple users, the core will reevaluate | |
1877 | * whether a new rate is needed, including when a user drop its clock. | |
1878 | * | |
1879 | * With clk_dummy_maximize_rate_ops, this means that the rate will | |
1880 | * trail along the maximum as it evolves. | |
1881 | */ | |
1882 | static void clk_range_test_multiple_set_range_rate_put_maximized(struct kunit *test) | |
1883 | { | |
1884 | struct clk_dummy_context *ctx = test->priv; | |
1885 | struct clk_hw *hw = &ctx->hw; | |
1886 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
1887 | struct clk *user1, *user2; | |
1888 | unsigned long rate; | |
1889 | ||
1890 | user1 = clk_hw_get_clk(hw, NULL); | |
1891 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user1); | |
1892 | ||
1893 | user2 = clk_hw_get_clk(hw, NULL); | |
1894 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user2); | |
1895 | ||
1896 | KUNIT_ASSERT_EQ(test, | |
1897 | clk_set_rate(clk, DUMMY_CLOCK_RATE_2 + 1000), | |
1898 | 0); | |
1899 | ||
1900 | KUNIT_ASSERT_EQ(test, | |
1901 | clk_set_rate_range(user1, | |
1902 | 0, | |
1903 | DUMMY_CLOCK_RATE_2), | |
1904 | 0); | |
1905 | ||
1906 | rate = clk_get_rate(clk); | |
1907 | KUNIT_ASSERT_GT(test, rate, 0); | |
1908 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2); | |
1909 | ||
1910 | KUNIT_ASSERT_EQ(test, | |
1911 | clk_set_rate_range(user2, | |
1912 | 0, | |
1913 | DUMMY_CLOCK_RATE_1), | |
1914 | 0); | |
1915 | ||
1916 | rate = clk_get_rate(clk); | |
1917 | KUNIT_ASSERT_GT(test, rate, 0); | |
1918 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1); | |
1919 | ||
1920 | clk_put(user2); | |
1921 | ||
1922 | rate = clk_get_rate(clk); | |
1923 | KUNIT_ASSERT_GT(test, rate, 0); | |
1924 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2); | |
1925 | ||
1926 | clk_put(user1); | |
1927 | clk_put(clk); | |
1928 | } | |
1929 | ||
723d0530 MR |
1930 | static struct kunit_case clk_range_maximize_test_cases[] = { |
1931 | KUNIT_CASE(clk_range_test_set_range_rate_maximized), | |
1932 | KUNIT_CASE(clk_range_test_multiple_set_range_rate_maximized), | |
d7738822 | 1933 | KUNIT_CASE(clk_range_test_multiple_set_range_rate_put_maximized), |
723d0530 MR |
1934 | {} |
1935 | }; | |
1936 | ||
090962b6 MR |
1937 | /* |
1938 | * Test suite for a basic rate clock, without any parent. | |
1939 | * | |
1940 | * These tests exercise the rate range API: clk_set_rate_range(), | |
1941 | * clk_set_min_rate(), clk_set_max_rate(), clk_drop_range(), with a | |
1942 | * driver that will always try to run at the highest possible rate. | |
1943 | */ | |
723d0530 MR |
1944 | static struct kunit_suite clk_range_maximize_test_suite = { |
1945 | .name = "clk-range-maximize-test", | |
1946 | .init = clk_maximize_test_init, | |
1947 | .exit = clk_test_exit, | |
1948 | .test_cases = clk_range_maximize_test_cases, | |
1949 | }; | |
1950 | ||
1951 | /* | |
c80ac50c MR |
1952 | * Test that if we have several subsequent calls to |
1953 | * clk_set_rate_range(), the core will reevaluate whether a new rate is | |
1954 | * needed each and every time. | |
723d0530 | 1955 | * |
c80ac50c MR |
1956 | * With clk_dummy_minimize_rate_ops, this means that the rate will |
1957 | * trail along the minimum as it evolves. | |
723d0530 MR |
1958 | */ |
1959 | static void clk_range_test_set_range_rate_minimized(struct kunit *test) | |
1960 | { | |
1961 | struct clk_dummy_context *ctx = test->priv; | |
1962 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 1963 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
1964 | unsigned long rate; |
1965 | ||
1966 | KUNIT_ASSERT_EQ(test, | |
1967 | clk_set_rate(clk, DUMMY_CLOCK_RATE_1 - 1000), | |
1968 | 0); | |
1969 | ||
1970 | KUNIT_ASSERT_EQ(test, | |
1971 | clk_set_rate_range(clk, | |
1972 | DUMMY_CLOCK_RATE_1, | |
1973 | DUMMY_CLOCK_RATE_2), | |
1974 | 0); | |
1975 | ||
1976 | rate = clk_get_rate(clk); | |
1977 | KUNIT_ASSERT_GT(test, rate, 0); | |
1978 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1); | |
1979 | ||
1980 | KUNIT_ASSERT_EQ(test, | |
1981 | clk_set_rate_range(clk, | |
1982 | DUMMY_CLOCK_RATE_1 + 1000, | |
1983 | DUMMY_CLOCK_RATE_2), | |
1984 | 0); | |
1985 | ||
1986 | rate = clk_get_rate(clk); | |
1987 | KUNIT_ASSERT_GT(test, rate, 0); | |
1988 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1 + 1000); | |
1989 | ||
1990 | KUNIT_ASSERT_EQ(test, | |
1991 | clk_set_rate_range(clk, | |
1992 | DUMMY_CLOCK_RATE_1, | |
1993 | DUMMY_CLOCK_RATE_2), | |
1994 | 0); | |
1995 | ||
1996 | rate = clk_get_rate(clk); | |
1997 | KUNIT_ASSERT_GT(test, rate, 0); | |
c80ac50c | 1998 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1); |
aac00c7f MR |
1999 | |
2000 | clk_put(clk); | |
723d0530 MR |
2001 | } |
2002 | ||
2003 | /* | |
c80ac50c MR |
2004 | * Test that if we have several subsequent calls to |
2005 | * clk_set_rate_range(), across multiple users, the core will reevaluate | |
2006 | * whether a new rate is needed each and every time. | |
723d0530 | 2007 | * |
c80ac50c MR |
2008 | * With clk_dummy_minimize_rate_ops, this means that the rate will |
2009 | * trail along the minimum as it evolves. | |
723d0530 MR |
2010 | */ |
2011 | static void clk_range_test_multiple_set_range_rate_minimized(struct kunit *test) | |
2012 | { | |
2013 | struct clk_dummy_context *ctx = test->priv; | |
2014 | struct clk_hw *hw = &ctx->hw; | |
aac00c7f | 2015 | struct clk *clk = clk_hw_get_clk(hw, NULL); |
723d0530 MR |
2016 | struct clk *user1, *user2; |
2017 | unsigned long rate; | |
2018 | ||
2019 | user1 = clk_hw_get_clk(hw, NULL); | |
2020 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user1); | |
2021 | ||
2022 | user2 = clk_hw_get_clk(hw, NULL); | |
2023 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user2); | |
2024 | ||
2025 | KUNIT_ASSERT_EQ(test, | |
2026 | clk_set_rate_range(user1, | |
2027 | DUMMY_CLOCK_RATE_1, | |
2028 | ULONG_MAX), | |
2029 | 0); | |
2030 | ||
2031 | rate = clk_get_rate(clk); | |
2032 | KUNIT_ASSERT_GT(test, rate, 0); | |
2033 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1); | |
2034 | ||
2035 | KUNIT_ASSERT_EQ(test, | |
2036 | clk_set_rate_range(user2, | |
2037 | DUMMY_CLOCK_RATE_2, | |
2038 | ULONG_MAX), | |
2039 | 0); | |
2040 | ||
2041 | rate = clk_get_rate(clk); | |
2042 | KUNIT_ASSERT_GT(test, rate, 0); | |
2043 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2); | |
2044 | ||
2045 | KUNIT_ASSERT_EQ(test, | |
c9744843 | 2046 | clk_drop_range(user2), |
723d0530 MR |
2047 | 0); |
2048 | ||
2049 | rate = clk_get_rate(clk); | |
2050 | KUNIT_ASSERT_GT(test, rate, 0); | |
c80ac50c | 2051 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1); |
723d0530 MR |
2052 | |
2053 | clk_put(user2); | |
2054 | clk_put(user1); | |
aac00c7f | 2055 | clk_put(clk); |
723d0530 MR |
2056 | } |
2057 | ||
d7738822 MR |
2058 | /* |
2059 | * Test that if we have several subsequent calls to | |
2060 | * clk_set_rate_range(), across multiple users, the core will reevaluate | |
2061 | * whether a new rate is needed, including when a user drop its clock. | |
2062 | * | |
2063 | * With clk_dummy_minimize_rate_ops, this means that the rate will | |
2064 | * trail along the minimum as it evolves. | |
2065 | */ | |
2066 | static void clk_range_test_multiple_set_range_rate_put_minimized(struct kunit *test) | |
2067 | { | |
2068 | struct clk_dummy_context *ctx = test->priv; | |
2069 | struct clk_hw *hw = &ctx->hw; | |
2070 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
2071 | struct clk *user1, *user2; | |
2072 | unsigned long rate; | |
2073 | ||
2074 | user1 = clk_hw_get_clk(hw, NULL); | |
2075 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user1); | |
2076 | ||
2077 | user2 = clk_hw_get_clk(hw, NULL); | |
2078 | KUNIT_ASSERT_NOT_ERR_OR_NULL(test, user2); | |
2079 | ||
2080 | KUNIT_ASSERT_EQ(test, | |
2081 | clk_set_rate_range(user1, | |
2082 | DUMMY_CLOCK_RATE_1, | |
2083 | ULONG_MAX), | |
2084 | 0); | |
2085 | ||
2086 | rate = clk_get_rate(clk); | |
2087 | KUNIT_ASSERT_GT(test, rate, 0); | |
2088 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1); | |
2089 | ||
2090 | KUNIT_ASSERT_EQ(test, | |
2091 | clk_set_rate_range(user2, | |
2092 | DUMMY_CLOCK_RATE_2, | |
2093 | ULONG_MAX), | |
2094 | 0); | |
2095 | ||
2096 | rate = clk_get_rate(clk); | |
2097 | KUNIT_ASSERT_GT(test, rate, 0); | |
2098 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_2); | |
2099 | ||
2100 | clk_put(user2); | |
2101 | ||
2102 | rate = clk_get_rate(clk); | |
2103 | KUNIT_ASSERT_GT(test, rate, 0); | |
2104 | KUNIT_EXPECT_EQ(test, rate, DUMMY_CLOCK_RATE_1); | |
2105 | ||
2106 | clk_put(user1); | |
2107 | clk_put(clk); | |
2108 | } | |
2109 | ||
723d0530 MR |
2110 | static struct kunit_case clk_range_minimize_test_cases[] = { |
2111 | KUNIT_CASE(clk_range_test_set_range_rate_minimized), | |
2112 | KUNIT_CASE(clk_range_test_multiple_set_range_rate_minimized), | |
d7738822 | 2113 | KUNIT_CASE(clk_range_test_multiple_set_range_rate_put_minimized), |
723d0530 MR |
2114 | {} |
2115 | }; | |
2116 | ||
090962b6 MR |
2117 | /* |
2118 | * Test suite for a basic rate clock, without any parent. | |
2119 | * | |
2120 | * These tests exercise the rate range API: clk_set_rate_range(), | |
2121 | * clk_set_min_rate(), clk_set_max_rate(), clk_drop_range(), with a | |
2122 | * driver that will always try to run at the lowest possible rate. | |
2123 | */ | |
723d0530 MR |
2124 | static struct kunit_suite clk_range_minimize_test_suite = { |
2125 | .name = "clk-range-minimize-test", | |
2126 | .init = clk_minimize_test_init, | |
2127 | .exit = clk_test_exit, | |
2128 | .test_cases = clk_range_minimize_test_cases, | |
2129 | }; | |
2130 | ||
262ca38f MR |
2131 | struct clk_leaf_mux_ctx { |
2132 | struct clk_multiple_parent_ctx mux_ctx; | |
2133 | struct clk_hw hw; | |
2134 | }; | |
2135 | ||
2136 | static int | |
2137 | clk_leaf_mux_set_rate_parent_test_init(struct kunit *test) | |
2138 | { | |
2139 | struct clk_leaf_mux_ctx *ctx; | |
2140 | const char *top_parents[2] = { "parent-0", "parent-1" }; | |
2141 | int ret; | |
2142 | ||
2143 | ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); | |
2144 | if (!ctx) | |
2145 | return -ENOMEM; | |
2146 | test->priv = ctx; | |
2147 | ||
2148 | ctx->mux_ctx.parents_ctx[0].hw.init = CLK_HW_INIT_NO_PARENT("parent-0", | |
2149 | &clk_dummy_rate_ops, | |
2150 | 0); | |
2151 | ctx->mux_ctx.parents_ctx[0].rate = DUMMY_CLOCK_RATE_1; | |
2152 | ret = clk_hw_register(NULL, &ctx->mux_ctx.parents_ctx[0].hw); | |
2153 | if (ret) | |
2154 | return ret; | |
2155 | ||
2156 | ctx->mux_ctx.parents_ctx[1].hw.init = CLK_HW_INIT_NO_PARENT("parent-1", | |
2157 | &clk_dummy_rate_ops, | |
2158 | 0); | |
2159 | ctx->mux_ctx.parents_ctx[1].rate = DUMMY_CLOCK_RATE_2; | |
2160 | ret = clk_hw_register(NULL, &ctx->mux_ctx.parents_ctx[1].hw); | |
2161 | if (ret) | |
2162 | return ret; | |
2163 | ||
2164 | ctx->mux_ctx.current_parent = 0; | |
2165 | ctx->mux_ctx.hw.init = CLK_HW_INIT_PARENTS("test-mux", top_parents, | |
2166 | &clk_multiple_parents_mux_ops, | |
2167 | 0); | |
2168 | ret = clk_hw_register(NULL, &ctx->mux_ctx.hw); | |
2169 | if (ret) | |
2170 | return ret; | |
2171 | ||
2172 | ctx->hw.init = CLK_HW_INIT_HW("test-clock", &ctx->mux_ctx.hw, | |
2173 | &clk_dummy_single_parent_ops, | |
2174 | CLK_SET_RATE_PARENT); | |
2175 | ret = clk_hw_register(NULL, &ctx->hw); | |
2176 | if (ret) | |
2177 | return ret; | |
2178 | ||
2179 | return 0; | |
2180 | } | |
2181 | ||
2182 | static void clk_leaf_mux_set_rate_parent_test_exit(struct kunit *test) | |
2183 | { | |
2184 | struct clk_leaf_mux_ctx *ctx = test->priv; | |
2185 | ||
2186 | clk_hw_unregister(&ctx->hw); | |
2187 | clk_hw_unregister(&ctx->mux_ctx.hw); | |
2188 | clk_hw_unregister(&ctx->mux_ctx.parents_ctx[0].hw); | |
2189 | clk_hw_unregister(&ctx->mux_ctx.parents_ctx[1].hw); | |
2190 | } | |
2191 | ||
2192 | /* | |
2193 | * Test that, for a clock that will forward any rate request to its | |
2194 | * parent, the rate request structure returned by __clk_determine_rate | |
2195 | * is sane and will be what we expect. | |
2196 | */ | |
2197 | static void clk_leaf_mux_set_rate_parent_determine_rate(struct kunit *test) | |
2198 | { | |
2199 | struct clk_leaf_mux_ctx *ctx = test->priv; | |
2200 | struct clk_hw *hw = &ctx->hw; | |
2201 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
2202 | struct clk_rate_request req; | |
2203 | unsigned long rate; | |
2204 | int ret; | |
2205 | ||
2206 | rate = clk_get_rate(clk); | |
2207 | KUNIT_ASSERT_EQ(test, rate, DUMMY_CLOCK_RATE_1); | |
2208 | ||
2209 | clk_hw_init_rate_request(hw, &req, DUMMY_CLOCK_RATE_2); | |
2210 | ||
2211 | ret = __clk_determine_rate(hw, &req); | |
2212 | KUNIT_ASSERT_EQ(test, ret, 0); | |
2213 | ||
2214 | KUNIT_EXPECT_EQ(test, req.rate, DUMMY_CLOCK_RATE_2); | |
2215 | KUNIT_EXPECT_EQ(test, req.best_parent_rate, DUMMY_CLOCK_RATE_2); | |
2216 | KUNIT_EXPECT_PTR_EQ(test, req.best_parent_hw, &ctx->mux_ctx.hw); | |
2217 | ||
2218 | clk_put(clk); | |
2219 | } | |
2220 | ||
2221 | static struct kunit_case clk_leaf_mux_set_rate_parent_test_cases[] = { | |
2222 | KUNIT_CASE(clk_leaf_mux_set_rate_parent_determine_rate), | |
2223 | {} | |
2224 | }; | |
2225 | ||
2226 | /* | |
2227 | * Test suite for a clock whose parent is a mux with multiple parents. | |
2228 | * The leaf clock has CLK_SET_RATE_PARENT, and will forward rate | |
2229 | * requests to the mux, which will then select which parent is the best | |
2230 | * fit for a given rate. | |
2231 | * | |
2232 | * These tests exercise the behaviour of muxes, and the proper selection | |
2233 | * of parents. | |
2234 | */ | |
2235 | static struct kunit_suite clk_leaf_mux_set_rate_parent_test_suite = { | |
2236 | .name = "clk-leaf-mux-set-rate-parent", | |
2237 | .init = clk_leaf_mux_set_rate_parent_test_init, | |
2238 | .exit = clk_leaf_mux_set_rate_parent_test_exit, | |
2239 | .test_cases = clk_leaf_mux_set_rate_parent_test_cases, | |
2240 | }; | |
2241 | ||
589a2004 MR |
2242 | struct clk_mux_notifier_rate_change { |
2243 | bool done; | |
2244 | unsigned long old_rate; | |
2245 | unsigned long new_rate; | |
2246 | wait_queue_head_t wq; | |
2247 | }; | |
2248 | ||
2249 | struct clk_mux_notifier_ctx { | |
2250 | struct clk_multiple_parent_ctx mux_ctx; | |
2251 | struct clk *clk; | |
2252 | struct notifier_block clk_nb; | |
2253 | struct clk_mux_notifier_rate_change pre_rate_change; | |
2254 | struct clk_mux_notifier_rate_change post_rate_change; | |
2255 | }; | |
2256 | ||
2257 | #define NOTIFIER_TIMEOUT_MS 100 | |
2258 | ||
2259 | static int clk_mux_notifier_callback(struct notifier_block *nb, | |
2260 | unsigned long action, void *data) | |
2261 | { | |
2262 | struct clk_notifier_data *clk_data = data; | |
2263 | struct clk_mux_notifier_ctx *ctx = container_of(nb, | |
2264 | struct clk_mux_notifier_ctx, | |
2265 | clk_nb); | |
2266 | ||
2267 | if (action & PRE_RATE_CHANGE) { | |
2268 | ctx->pre_rate_change.old_rate = clk_data->old_rate; | |
2269 | ctx->pre_rate_change.new_rate = clk_data->new_rate; | |
2270 | ctx->pre_rate_change.done = true; | |
2271 | wake_up_interruptible(&ctx->pre_rate_change.wq); | |
2272 | } | |
2273 | ||
2274 | if (action & POST_RATE_CHANGE) { | |
2275 | ctx->post_rate_change.old_rate = clk_data->old_rate; | |
2276 | ctx->post_rate_change.new_rate = clk_data->new_rate; | |
2277 | ctx->post_rate_change.done = true; | |
2278 | wake_up_interruptible(&ctx->post_rate_change.wq); | |
2279 | } | |
2280 | ||
2281 | return 0; | |
2282 | } | |
2283 | ||
2284 | static int clk_mux_notifier_test_init(struct kunit *test) | |
2285 | { | |
2286 | struct clk_mux_notifier_ctx *ctx; | |
2287 | const char *top_parents[2] = { "parent-0", "parent-1" }; | |
2288 | int ret; | |
2289 | ||
2290 | ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL); | |
2291 | if (!ctx) | |
2292 | return -ENOMEM; | |
2293 | test->priv = ctx; | |
2294 | ctx->clk_nb.notifier_call = clk_mux_notifier_callback; | |
2295 | init_waitqueue_head(&ctx->pre_rate_change.wq); | |
2296 | init_waitqueue_head(&ctx->post_rate_change.wq); | |
2297 | ||
2298 | ctx->mux_ctx.parents_ctx[0].hw.init = CLK_HW_INIT_NO_PARENT("parent-0", | |
2299 | &clk_dummy_rate_ops, | |
2300 | 0); | |
2301 | ctx->mux_ctx.parents_ctx[0].rate = DUMMY_CLOCK_RATE_1; | |
2302 | ret = clk_hw_register(NULL, &ctx->mux_ctx.parents_ctx[0].hw); | |
2303 | if (ret) | |
2304 | return ret; | |
2305 | ||
2306 | ctx->mux_ctx.parents_ctx[1].hw.init = CLK_HW_INIT_NO_PARENT("parent-1", | |
2307 | &clk_dummy_rate_ops, | |
2308 | 0); | |
2309 | ctx->mux_ctx.parents_ctx[1].rate = DUMMY_CLOCK_RATE_2; | |
2310 | ret = clk_hw_register(NULL, &ctx->mux_ctx.parents_ctx[1].hw); | |
2311 | if (ret) | |
2312 | return ret; | |
2313 | ||
2314 | ctx->mux_ctx.current_parent = 0; | |
2315 | ctx->mux_ctx.hw.init = CLK_HW_INIT_PARENTS("test-mux", top_parents, | |
2316 | &clk_multiple_parents_mux_ops, | |
2317 | 0); | |
2318 | ret = clk_hw_register(NULL, &ctx->mux_ctx.hw); | |
2319 | if (ret) | |
2320 | return ret; | |
2321 | ||
2322 | ctx->clk = clk_hw_get_clk(&ctx->mux_ctx.hw, NULL); | |
2323 | ret = clk_notifier_register(ctx->clk, &ctx->clk_nb); | |
2324 | if (ret) | |
2325 | return ret; | |
2326 | ||
2327 | return 0; | |
2328 | } | |
2329 | ||
2330 | static void clk_mux_notifier_test_exit(struct kunit *test) | |
2331 | { | |
2332 | struct clk_mux_notifier_ctx *ctx = test->priv; | |
2333 | struct clk *clk = ctx->clk; | |
2334 | ||
2335 | clk_notifier_unregister(clk, &ctx->clk_nb); | |
2336 | clk_put(clk); | |
2337 | ||
2338 | clk_hw_unregister(&ctx->mux_ctx.hw); | |
2339 | clk_hw_unregister(&ctx->mux_ctx.parents_ctx[0].hw); | |
2340 | clk_hw_unregister(&ctx->mux_ctx.parents_ctx[1].hw); | |
2341 | } | |
2342 | ||
2343 | /* | |
2344 | * Test that if the we have a notifier registered on a mux, the core | |
2345 | * will notify us when we switch to another parent, and with the proper | |
2346 | * old and new rates. | |
2347 | */ | |
2348 | static void clk_mux_notifier_set_parent_test(struct kunit *test) | |
2349 | { | |
2350 | struct clk_mux_notifier_ctx *ctx = test->priv; | |
2351 | struct clk_hw *hw = &ctx->mux_ctx.hw; | |
2352 | struct clk *clk = clk_hw_get_clk(hw, NULL); | |
2353 | struct clk *new_parent = clk_hw_get_clk(&ctx->mux_ctx.parents_ctx[1].hw, NULL); | |
2354 | int ret; | |
2355 | ||
2356 | ret = clk_set_parent(clk, new_parent); | |
2357 | KUNIT_ASSERT_EQ(test, ret, 0); | |
2358 | ||
2359 | ret = wait_event_interruptible_timeout(ctx->pre_rate_change.wq, | |
2360 | ctx->pre_rate_change.done, | |
2361 | msecs_to_jiffies(NOTIFIER_TIMEOUT_MS)); | |
2362 | KUNIT_ASSERT_GT(test, ret, 0); | |
2363 | ||
2364 | KUNIT_EXPECT_EQ(test, ctx->pre_rate_change.old_rate, DUMMY_CLOCK_RATE_1); | |
2365 | KUNIT_EXPECT_EQ(test, ctx->pre_rate_change.new_rate, DUMMY_CLOCK_RATE_2); | |
2366 | ||
2367 | ret = wait_event_interruptible_timeout(ctx->post_rate_change.wq, | |
2368 | ctx->post_rate_change.done, | |
2369 | msecs_to_jiffies(NOTIFIER_TIMEOUT_MS)); | |
2370 | KUNIT_ASSERT_GT(test, ret, 0); | |
2371 | ||
2372 | KUNIT_EXPECT_EQ(test, ctx->post_rate_change.old_rate, DUMMY_CLOCK_RATE_1); | |
2373 | KUNIT_EXPECT_EQ(test, ctx->post_rate_change.new_rate, DUMMY_CLOCK_RATE_2); | |
2374 | ||
2375 | clk_put(new_parent); | |
2376 | clk_put(clk); | |
2377 | } | |
2378 | ||
2379 | static struct kunit_case clk_mux_notifier_test_cases[] = { | |
2380 | KUNIT_CASE(clk_mux_notifier_set_parent_test), | |
2381 | {} | |
2382 | }; | |
2383 | ||
2384 | /* | |
2385 | * Test suite for a mux with multiple parents, and a notifier registered | |
2386 | * on the mux. | |
2387 | * | |
2388 | * These tests exercise the behaviour of notifiers. | |
2389 | */ | |
2390 | static struct kunit_suite clk_mux_notifier_test_suite = { | |
2391 | .name = "clk-mux-notifier", | |
2392 | .init = clk_mux_notifier_test_init, | |
2393 | .exit = clk_mux_notifier_test_exit, | |
2394 | .test_cases = clk_mux_notifier_test_cases, | |
2395 | }; | |
2396 | ||
723d0530 | 2397 | kunit_test_suites( |
262ca38f | 2398 | &clk_leaf_mux_set_rate_parent_test_suite, |
723d0530 | 2399 | &clk_test_suite, |
74933ef2 | 2400 | &clk_multiple_parents_mux_test_suite, |
589a2004 | 2401 | &clk_mux_notifier_test_suite, |
2e9cad1a | 2402 | &clk_orphan_transparent_multiple_parent_mux_test_suite, |
481f541c | 2403 | &clk_orphan_transparent_single_parent_test_suite, |
cb1b1dd9 | 2404 | &clk_orphan_two_level_root_last_test_suite, |
723d0530 MR |
2405 | &clk_range_test_suite, |
2406 | &clk_range_maximize_test_suite, | |
350575ab | 2407 | &clk_range_minimize_test_suite, |
02cdeace | 2408 | &clk_single_parent_mux_test_suite, |
350575ab | 2409 | &clk_uncached_test_suite |
723d0530 MR |
2410 | ); |
2411 | MODULE_LICENSE("GPL v2"); |