1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (c) 2010-2011 Jeremy Kerr <jeremy.kerr@canonical.com>
4 * Copyright (C) 2011-2012 Linaro Ltd <mturquette@linaro.org>
5 */
6 #ifndef __LINUX_CLK_PROVIDER_H
7 #define __LINUX_CLK_PROVIDER_H
8
9 #include <linux/of.h>
10 #include <linux/of_clk.h>
11
12 /*
13 * flags used across common struct clk. these flags should only affect the
14 * top-level framework. custom flags for dealing with hardware specifics
15 * belong in struct clk_foo
16 *
17 * Please update clk_flags[] in drivers/clk/clk.c when making changes here!
18 */
19 #define CLK_SET_RATE_GATE BIT(0) /* must be gated across rate change */
20 #define CLK_SET_PARENT_GATE BIT(1) /* must be gated across re-parent */
21 #define CLK_SET_RATE_PARENT BIT(2) /* propagate rate change up one level */
22 #define CLK_IGNORE_UNUSED BIT(3) /* do not gate even if unused */
23 /* unused */
24 /* unused */
25 #define CLK_GET_RATE_NOCACHE BIT(6) /* do not use the cached clk rate */
26 #define CLK_SET_RATE_NO_REPARENT BIT(7) /* don't re-parent on rate change */
27 #define CLK_GET_ACCURACY_NOCACHE BIT(8) /* do not use the cached clk accuracy */
28 #define CLK_RECALC_NEW_RATES BIT(9) /* recalc rates after notifications */
29 #define CLK_SET_RATE_UNGATE BIT(10) /* clock needs to run to set rate */
30 #define CLK_IS_CRITICAL BIT(11) /* do not gate, ever */
31 /* parents need enable during gate/ungate, set rate and re-parent */
32 #define CLK_OPS_PARENT_ENABLE BIT(12)
33 /* duty cycle call may be forwarded to the parent clock */
34 #define CLK_DUTY_CYCLE_PARENT BIT(13)
35
36 struct clk;
37 struct clk_hw;
38 struct clk_core;
39 struct dentry;
40
41 /**
42 * struct clk_rate_request - Structure encoding the clk constraints that
43 * a clock user might require.
44 *
45 * Should be initialized by calling clk_hw_init_rate_request().
46 *
47 * @core: Pointer to the struct clk_core affected by this request
48 * @rate: Requested clock rate. This field will be adjusted by
49 * clock drivers according to hardware capabilities.
50 * @min_rate: Minimum rate imposed by clk users.
51 * @max_rate: Maximum rate imposed by clk users.
52 * @best_parent_rate: The best parent rate a parent can provide to fulfill the
53 * requested constraints.
54 * @best_parent_hw: The most appropriate parent clock that fulfills the
55 * requested constraints.
56 *
57 */
58 struct clk_rate_request {
59 struct clk_core *core;
60 unsigned long rate;
61 unsigned long min_rate;
62 unsigned long max_rate;
63 unsigned long best_parent_rate;
64 struct clk_hw *best_parent_hw;
65 };
66
67 void clk_hw_init_rate_request(const struct clk_hw *hw,
68 struct clk_rate_request *req,
69 unsigned long rate);
70 void clk_hw_forward_rate_request(const struct clk_hw *core,
71 const struct clk_rate_request *old_req,
72 const struct clk_hw *parent,
73 struct clk_rate_request *req,
74 unsigned long parent_rate);
75
76 /**
77 * struct clk_duty - Structure encoding the duty cycle ratio of a clock
78 *
79 * @num: Numerator of the duty cycle ratio
80 * @den: Denominator of the duty cycle ratio
81 */
82 struct clk_duty {
83 unsigned int num;
84 unsigned int den;
85 };
86
87 /**
88 * struct clk_ops - Callback operations for hardware clocks; these are to
89 * be provided by the clock implementation, and will be called by drivers
90 * through the clk_* api.
91 *
92 * @prepare: Prepare the clock for enabling. This must not return until
93 * the clock is fully prepared, and it's safe to call clk_enable.
94 * This callback is intended to allow clock implementations to
95 * do any initialisation that may sleep. Called with
96 * prepare_lock held.
97 *
98 * @unprepare: Release the clock from its prepared state. This will typically
99 * undo any work done in the @prepare callback. Called with
100 * prepare_lock held.
101 *
102 * @is_prepared: Queries the hardware to determine if the clock is prepared.
103 * This function is allowed to sleep. Optional, if this op is not
104 * set then the prepare count will be used.
105 *
106 * @unprepare_unused: Unprepare the clock atomically. Only called from
107 * clk_disable_unused for prepare clocks with special needs.
108 * Called with prepare mutex held. This function may sleep.
109 *
110 * @enable: Enable the clock atomically. This must not return until the
111 * clock is generating a valid clock signal, usable by consumer
112 * devices. Called with enable_lock held. This function must not
113 * sleep.
114 *
115 * @disable: Disable the clock atomically. Called with enable_lock held.
116 * This function must not sleep.
117 *
118 * @is_enabled: Queries the hardware to determine if the clock is enabled.
119 * This function must not sleep. Optional, if this op is not
120 * set then the enable count will be used.
121 *
122 * @disable_unused: Disable the clock atomically. Only called from
123 * clk_disable_unused for gate clocks with special needs.
124 * Called with enable_lock held. This function must not
125 * sleep.
126 *
127 * @save_context: Save the context of the clock in prepration for poweroff.
128 *
129 * @restore_context: Restore the context of the clock after a restoration
130 * of power.
131 *
132 * @recalc_rate: Recalculate the rate of this clock, by querying hardware. The
133 * parent rate is an input parameter. It is up to the caller to
134 * ensure that the prepare_mutex is held across this call. If the
135 * driver cannot figure out a rate for this clock, it must return
136 * 0. Returns the calculated rate. Optional, but recommended - if
137 * this op is not set then clock rate will be initialized to 0.
138 *
139 * @round_rate: Given a target rate as input, returns the closest rate actually
140 * supported by the clock. The parent rate is an input/output
141 * parameter.
142 *
143 * @determine_rate: Given a target rate as input, returns the closest rate
144 * actually supported by the clock, and optionally the parent clock
145 * that should be used to provide the clock rate.
146 *
147 * @set_parent: Change the input source of this clock; for clocks with multiple
148 * possible parents specify a new parent by passing in the index
149 * as a u8 corresponding to the parent in either the .parent_names
150 * or .parents arrays. This function in affect translates an
151 * array index into the value programmed into the hardware.
152 * Returns 0 on success, -EERROR otherwise.
153 *
154 * @get_parent: Queries the hardware to determine the parent of a clock. The
155 * return value is a u8 which specifies the index corresponding to
156 * the parent clock. This index can be applied to either the
157 * .parent_names or .parents arrays. In short, this function
158 * translates the parent value read from hardware into an array
159 * index. Currently only called when the clock is initialized by
160 * __clk_init. This callback is mandatory for clocks with
161 * multiple parents. It is optional (and unnecessary) for clocks
162 * with 0 or 1 parents.
163 *
164 * @set_rate: Change the rate of this clock. The requested rate is specified
165 * by the second argument, which should typically be the return
166 * of .round_rate call. The third argument gives the parent rate
167 * which is likely helpful for most .set_rate implementation.
168 * Returns 0 on success, -EERROR otherwise.
169 *
170 * @set_rate_and_parent: Change the rate and the parent of this clock. The
171 * requested rate is specified by the second argument, which
172 * should typically be the return of .round_rate call. The
173 * third argument gives the parent rate which is likely helpful
174 * for most .set_rate_and_parent implementation. The fourth
175 * argument gives the parent index. This callback is optional (and
176 * unnecessary) for clocks with 0 or 1 parents as well as
177 * for clocks that can tolerate switching the rate and the parent
178 * separately via calls to .set_parent and .set_rate.
179 * Returns 0 on success, -EERROR otherwise.
180 *
181 * @recalc_accuracy: Recalculate the accuracy of this clock. The clock accuracy
182 * is expressed in ppb (parts per billion). The parent accuracy is
183 * an input parameter.
184 * Returns the calculated accuracy. Optional - if this op is not
185 * set then clock accuracy will be initialized to parent accuracy
186 * or 0 (perfect clock) if clock has no parent.
187 *
188 * @get_phase: Queries the hardware to get the current phase of a clock.
189 * Returned values are 0-359 degrees on success, negative
190 * error codes on failure.
191 *
192 * @set_phase: Shift the phase this clock signal in degrees specified
193 * by the second argument. Valid values for degrees are
194 * 0-359. Return 0 on success, otherwise -EERROR.
195 *
196 * @get_duty_cycle: Queries the hardware to get the current duty cycle ratio
197 * of a clock. Returned values denominator cannot be 0 and must be
198 * superior or equal to the numerator.
199 *
200 * @set_duty_cycle: Apply the duty cycle ratio to this clock signal specified by
201 * the numerator (2nd argurment) and denominator (3rd argument).
202 * Argument must be a valid ratio (denominator > 0
203 * and >= numerator) Return 0 on success, otherwise -EERROR.
204 *
205 * @init: Perform platform-specific initialization magic.
206 * This is not used by any of the basic clock types.
207 * This callback exist for HW which needs to perform some
208 * initialisation magic for CCF to get an accurate view of the
209 * clock. It may also be used dynamic resource allocation is
210 * required. It shall not used to deal with clock parameters,
211 * such as rate or parents.
212 * Returns 0 on success, -EERROR otherwise.
213 *
214 * @terminate: Free any resource allocated by init.
215 *
216 * @debug_init: Set up type-specific debugfs entries for this clock. This
217 * is called once, after the debugfs directory entry for this
218 * clock has been created. The dentry pointer representing that
219 * directory is provided as an argument. Called with
220 * prepare_lock held. Returns 0 on success, -EERROR otherwise.
221 *
222 *
223 * The clk_enable/clk_disable and clk_prepare/clk_unprepare pairs allow
224 * implementations to split any work between atomic (enable) and sleepable
225 * (prepare) contexts. If enabling a clock requires code that might sleep,
226 * this must be done in clk_prepare. Clock enable code that will never be
227 * called in a sleepable context may be implemented in clk_enable.
228 *
229 * Typically, drivers will call clk_prepare when a clock may be needed later
230 * (eg. when a device is opened), and clk_enable when the clock is actually
231 * required (eg. from an interrupt). Note that clk_prepare MUST have been
232 * called before clk_enable.
233 */
234 struct clk_ops {
235 int (*prepare)(struct clk_hw *hw);
236 void (*unprepare)(struct clk_hw *hw);
237 int (*is_prepared)(struct clk_hw *hw);
238 void (*unprepare_unused)(struct clk_hw *hw);
239 int (*enable)(struct clk_hw *hw);
240 void (*disable)(struct clk_hw *hw);
241 int (*is_enabled)(struct clk_hw *hw);
242 void (*disable_unused)(struct clk_hw *hw);
243 int (*save_context)(struct clk_hw *hw);
244 void (*restore_context)(struct clk_hw *hw);
245 unsigned long (*recalc_rate)(struct clk_hw *hw,
246 unsigned long parent_rate);
247 long (*round_rate)(struct clk_hw *hw, unsigned long rate,
248 unsigned long *parent_rate);
249 int (*determine_rate)(struct clk_hw *hw,
250 struct clk_rate_request *req);
251 int (*set_parent)(struct clk_hw *hw, u8 index);
252 u8 (*get_parent)(struct clk_hw *hw);
253 int (*set_rate)(struct clk_hw *hw, unsigned long rate,
254 unsigned long parent_rate);
255 int (*set_rate_and_parent)(struct clk_hw *hw,
256 unsigned long rate,
257 unsigned long parent_rate, u8 index);
258 unsigned long (*recalc_accuracy)(struct clk_hw *hw,
259 unsigned long parent_accuracy);
260 int (*get_phase)(struct clk_hw *hw);
261 int (*set_phase)(struct clk_hw *hw, int degrees);
262 int (*get_duty_cycle)(struct clk_hw *hw,
263 struct clk_duty *duty);
264 int (*set_duty_cycle)(struct clk_hw *hw,
265 struct clk_duty *duty);
266 int (*init)(struct clk_hw *hw);
267 void (*terminate)(struct clk_hw *hw);
268 void (*debug_init)(struct clk_hw *hw, struct dentry *dentry);
269 };
270
271 /**
272 * struct clk_parent_data - clk parent information
273 * @hw: parent clk_hw pointer (used for clk providers with internal clks)
274 * @fw_name: parent name local to provider registering clk
275 * @name: globally unique parent name (used as a fallback)
276 * @index: parent index local to provider registering clk (if @fw_name absent)
277 */
278 struct clk_parent_data {
279 const struct clk_hw *hw;
280 const char *fw_name;
281 const char *name;
282 int index;
283 };
284
285 /**
286 * struct clk_init_data - holds init data that's common to all clocks and is
287 * shared between the clock provider and the common clock framework.
288 *
289 * @name: clock name
290 * @ops: operations this clock supports
291 * @parent_names: array of string names for all possible parents
292 * @parent_data: array of parent data for all possible parents (when some
293 * parents are external to the clk controller)
294 * @parent_hws: array of pointers to all possible parents (when all parents
295 * are internal to the clk controller)
296 * @num_parents: number of possible parents
297 * @flags: framework-level hints and quirks
298 */
299 struct clk_init_data {
300 const char *name;
301 const struct clk_ops *ops;
302 /* Only one of the following three should be assigned */
303 const char * const *parent_names;
304 const struct clk_parent_data *parent_data;
305 const struct clk_hw **parent_hws;
306 u8 num_parents;
307 unsigned long flags;
308 };
309
310 /**
311 * struct clk_hw - handle for traversing from a struct clk to its corresponding
312 * hardware-specific structure. struct clk_hw should be declared within struct
313 * clk_foo and then referenced by the struct clk instance that uses struct
314 * clk_foo's clk_ops
315 *
316 * @core: pointer to the struct clk_core instance that points back to this
317 * struct clk_hw instance
318 *
319 * @clk: pointer to the per-user struct clk instance that can be used to call
320 * into the clk API
321 *
322 * @init: pointer to struct clk_init_data that contains the init data shared
323 * with the common clock framework. This pointer will be set to NULL once
324 * a clk_register() variant is called on this clk_hw pointer.
325 */
326 struct clk_hw {
327 struct clk_core *core;
328 struct clk *clk;
329 const struct clk_init_data *init;
330 };
331
332 /*
333 * DOC: Basic clock implementations common to many platforms
334 *
335 * Each basic clock hardware type is comprised of a structure describing the
336 * clock hardware, implementations of the relevant callbacks in struct clk_ops,
337 * unique flags for that hardware type, a registration function and an
338 * alternative macro for static initialization
339 */
340
341 /**
342 * struct clk_fixed_rate - fixed-rate clock
343 * @hw: handle between common and hardware-specific interfaces
344 * @fixed_rate: constant frequency of clock
345 * @fixed_accuracy: constant accuracy of clock in ppb (parts per billion)
346 * @flags: hardware specific flags
347 *
348 * Flags:
349 * * CLK_FIXED_RATE_PARENT_ACCURACY - Use the accuracy of the parent clk
350 * instead of what's set in @fixed_accuracy.
351 */
352 struct clk_fixed_rate {
353 struct clk_hw hw;
354 unsigned long fixed_rate;
355 unsigned long fixed_accuracy;
356 unsigned long flags;
357 };
358
359 #define CLK_FIXED_RATE_PARENT_ACCURACY BIT(0)
360
361 extern const struct clk_ops clk_fixed_rate_ops;
362 struct clk_hw *__clk_hw_register_fixed_rate(struct device *dev,
363 struct device_node *np, const char *name,
364 const char *parent_name, const struct clk_hw *parent_hw,
365 const struct clk_parent_data *parent_data, unsigned long flags,
366 unsigned long fixed_rate, unsigned long fixed_accuracy,
367 unsigned long clk_fixed_flags, bool devm);
368 struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
369 const char *parent_name, unsigned long flags,
370 unsigned long fixed_rate);
371 /**
372 * clk_hw_register_fixed_rate - register fixed-rate clock with the clock
373 * framework
374 * @dev: device that is registering this clock
375 * @name: name of this clock
376 * @parent_name: name of clock's parent
377 * @flags: framework-specific flags
378 * @fixed_rate: non-adjustable clock rate
379 */
380 #define clk_hw_register_fixed_rate(dev, name, parent_name, flags, fixed_rate) \
381 __clk_hw_register_fixed_rate((dev), NULL, (name), (parent_name), NULL, \
382 NULL, (flags), (fixed_rate), 0, 0, false)
383
384 /**
385 * devm_clk_hw_register_fixed_rate - register fixed-rate clock with the clock
386 * framework
387 * @dev: device that is registering this clock
388 * @name: name of this clock
389 * @parent_name: name of clock's parent
390 * @flags: framework-specific flags
391 * @fixed_rate: non-adjustable clock rate
392 */
393 #define devm_clk_hw_register_fixed_rate(dev, name, parent_name, flags, fixed_rate) \
394 __clk_hw_register_fixed_rate((dev), NULL, (name), (parent_name), NULL, \
395 NULL, (flags), (fixed_rate), 0, 0, true)
396 /**
397 * clk_hw_register_fixed_rate_parent_hw - register fixed-rate clock with
398 * the clock framework
399 * @dev: device that is registering this clock
400 * @name: name of this clock
401 * @parent_hw: pointer to parent clk
402 * @flags: framework-specific flags
403 * @fixed_rate: non-adjustable clock rate
404 */
405 #define clk_hw_register_fixed_rate_parent_hw(dev, name, parent_hw, flags, \
406 fixed_rate) \
407 __clk_hw_register_fixed_rate((dev), NULL, (name), NULL, (parent_hw), \
408 NULL, (flags), (fixed_rate), 0, 0, false)
409 /**
410 * clk_hw_register_fixed_rate_parent_data - register fixed-rate clock with
411 * the clock framework
412 * @dev: device that is registering this clock
413 * @name: name of this clock
414 * @parent_data: parent clk data
415 * @flags: framework-specific flags
416 * @fixed_rate: non-adjustable clock rate
417 */
418 #define clk_hw_register_fixed_rate_parent_data(dev, name, parent_data, flags, \
419 fixed_rate) \
420 __clk_hw_register_fixed_rate((dev), NULL, (name), NULL, NULL, \
421 (parent_data), (flags), (fixed_rate), 0, \
422 0, false)
423 /**
424 * clk_hw_register_fixed_rate_with_accuracy - register fixed-rate clock with
425 * the clock framework
426 * @dev: device that is registering this clock
427 * @name: name of this clock
428 * @parent_name: name of clock's parent
429 * @flags: framework-specific flags
430 * @fixed_rate: non-adjustable clock rate
431 * @fixed_accuracy: non-adjustable clock accuracy
432 */
433 #define clk_hw_register_fixed_rate_with_accuracy(dev, name, parent_name, \
434 flags, fixed_rate, \
435 fixed_accuracy) \
436 __clk_hw_register_fixed_rate((dev), NULL, (name), (parent_name), \
437 NULL, NULL, (flags), (fixed_rate), \
438 (fixed_accuracy), 0, false)
439 /**
440 * clk_hw_register_fixed_rate_with_accuracy_parent_hw - register fixed-rate
441 * clock with the clock framework
442 * @dev: device that is registering this clock
443 * @name: name of this clock
444 * @parent_hw: pointer to parent clk
445 * @flags: framework-specific flags
446 * @fixed_rate: non-adjustable clock rate
447 * @fixed_accuracy: non-adjustable clock accuracy
448 */
449 #define clk_hw_register_fixed_rate_with_accuracy_parent_hw(dev, name, \
450 parent_hw, flags, fixed_rate, fixed_accuracy) \
451 __clk_hw_register_fixed_rate((dev), NULL, (name), NULL, (parent_hw), \
452 NULL, (flags), (fixed_rate), \
453 (fixed_accuracy), 0, false)
454 /**
455 * clk_hw_register_fixed_rate_with_accuracy_parent_data - register fixed-rate
456 * clock with the clock framework
457 * @dev: device that is registering this clock
458 * @name: name of this clock
459 * @parent_data: name of clock's parent
460 * @flags: framework-specific flags
461 * @fixed_rate: non-adjustable clock rate
462 * @fixed_accuracy: non-adjustable clock accuracy
463 */
464 #define clk_hw_register_fixed_rate_with_accuracy_parent_data(dev, name, \
465 parent_data, flags, fixed_rate, fixed_accuracy) \
466 __clk_hw_register_fixed_rate((dev), NULL, (name), NULL, NULL, \
467 (parent_data), NULL, (flags), \
468 (fixed_rate), (fixed_accuracy), 0, false)
469 /**
470 * clk_hw_register_fixed_rate_parent_accuracy - register fixed-rate clock with
471 * the clock framework
472 * @dev: device that is registering this clock
473 * @name: name of this clock
474 * @parent_data: name of clock's parent
475 * @flags: framework-specific flags
476 * @fixed_rate: non-adjustable clock rate
477 */
478 #define clk_hw_register_fixed_rate_parent_accuracy(dev, name, parent_data, \
479 flags, fixed_rate) \
480 __clk_hw_register_fixed_rate((dev), NULL, (name), NULL, NULL, \
481 (parent_data), (flags), (fixed_rate), 0, \
482 CLK_FIXED_RATE_PARENT_ACCURACY, false)
483
484 void clk_unregister_fixed_rate(struct clk *clk);
485 void clk_hw_unregister_fixed_rate(struct clk_hw *hw);
486
487 void of_fixed_clk_setup(struct device_node *np);
488
489 /**
490 * struct clk_gate - gating clock
491 *
492 * @hw: handle between common and hardware-specific interfaces
493 * @reg: register controlling gate
494 * @bit_idx: single bit controlling gate
495 * @flags: hardware-specific flags
496 * @lock: register lock
497 *
498 * Clock which can gate its output. Implements .enable & .disable
499 *
500 * Flags:
501 * CLK_GATE_SET_TO_DISABLE - by default this clock sets the bit at bit_idx to
502 * enable the clock. Setting this flag does the opposite: setting the bit
503 * disable the clock and clearing it enables the clock
504 * CLK_GATE_HIWORD_MASK - The gate settings are only in lower 16-bit
505 * of this register, and mask of gate bits are in higher 16-bit of this
506 * register. While setting the gate bits, higher 16-bit should also be
507 * updated to indicate changing gate bits.
508 * CLK_GATE_BIG_ENDIAN - by default little endian register accesses are used for
509 * the gate register. Setting this flag makes the register accesses big
510 * endian.
511 */
512 struct clk_gate {
513 struct clk_hw hw;
514 void __iomem *reg;
515 u8 bit_idx;
516 u8 flags;
517 spinlock_t *lock;
518 };
519
520 #define to_clk_gate(_hw) container_of(_hw, struct clk_gate, hw)
521
522 #define CLK_GATE_SET_TO_DISABLE BIT(0)
523 #define CLK_GATE_HIWORD_MASK BIT(1)
524 #define CLK_GATE_BIG_ENDIAN BIT(2)
525
526 extern const struct clk_ops clk_gate_ops;
527 struct clk_hw *__clk_hw_register_gate(struct device *dev,
528 struct device_node *np, const char *name,
529 const char *parent_name, const struct clk_hw *parent_hw,
530 const struct clk_parent_data *parent_data,
531 unsigned long flags,
532 void __iomem *reg, u8 bit_idx,
533 u8 clk_gate_flags, spinlock_t *lock);
534 struct clk_hw *__devm_clk_hw_register_gate(struct device *dev,
535 struct device_node *np, const char *name,
536 const char *parent_name, const struct clk_hw *parent_hw,
537 const struct clk_parent_data *parent_data,
538 unsigned long flags,
539 void __iomem *reg, u8 bit_idx,
540 u8 clk_gate_flags, spinlock_t *lock);
541 struct clk *clk_register_gate(struct device *dev, const char *name,
542 const char *parent_name, unsigned long flags,
543 void __iomem *reg, u8 bit_idx,
544 u8 clk_gate_flags, spinlock_t *lock);
545 /**
546 * clk_hw_register_gate - register a gate clock with the clock framework
547 * @dev: device that is registering this clock
548 * @name: name of this clock
549 * @parent_name: name of this clock's parent
550 * @flags: framework-specific flags for this clock
551 * @reg: register address to control gating of this clock
552 * @bit_idx: which bit in the register controls gating of this clock
553 * @clk_gate_flags: gate-specific flags for this clock
554 * @lock: shared register lock for this clock
555 */
556 #define clk_hw_register_gate(dev, name, parent_name, flags, reg, bit_idx, \
557 clk_gate_flags, lock) \
558 __clk_hw_register_gate((dev), NULL, (name), (parent_name), NULL, \
559 NULL, (flags), (reg), (bit_idx), \
560 (clk_gate_flags), (lock))
561 /**
562 * clk_hw_register_gate_parent_hw - register a gate clock with the clock
563 * framework
564 * @dev: device that is registering this clock
565 * @name: name of this clock
566 * @parent_hw: pointer to parent clk
567 * @flags: framework-specific flags for this clock
568 * @reg: register address to control gating of this clock
569 * @bit_idx: which bit in the register controls gating of this clock
570 * @clk_gate_flags: gate-specific flags for this clock
571 * @lock: shared register lock for this clock
572 */
573 #define clk_hw_register_gate_parent_hw(dev, name, parent_hw, flags, reg, \
574 bit_idx, clk_gate_flags, lock) \
575 __clk_hw_register_gate((dev), NULL, (name), NULL, (parent_hw), \
576 NULL, (flags), (reg), (bit_idx), \
577 (clk_gate_flags), (lock))
578 /**
579 * clk_hw_register_gate_parent_data - register a gate clock with the clock
580 * framework
581 * @dev: device that is registering this clock
582 * @name: name of this clock
583 * @parent_data: parent clk data
584 * @flags: framework-specific flags for this clock
585 * @reg: register address to control gating of this clock
586 * @bit_idx: which bit in the register controls gating of this clock
587 * @clk_gate_flags: gate-specific flags for this clock
588 * @lock: shared register lock for this clock
589 */
590 #define clk_hw_register_gate_parent_data(dev, name, parent_data, flags, reg, \
591 bit_idx, clk_gate_flags, lock) \
592 __clk_hw_register_gate((dev), NULL, (name), NULL, NULL, (parent_data), \
593 (flags), (reg), (bit_idx), \
594 (clk_gate_flags), (lock))
595 /**
596 * devm_clk_hw_register_gate - register a gate clock with the clock framework
597 * @dev: device that is registering this clock
598 * @name: name of this clock
599 * @parent_name: name of this clock's parent
600 * @flags: framework-specific flags for this clock
601 * @reg: register address to control gating of this clock
602 * @bit_idx: which bit in the register controls gating of this clock
603 * @clk_gate_flags: gate-specific flags for this clock
604 * @lock: shared register lock for this clock
605 */
606 #define devm_clk_hw_register_gate(dev, name, parent_name, flags, reg, bit_idx,\
607 clk_gate_flags, lock) \
608 __devm_clk_hw_register_gate((dev), NULL, (name), (parent_name), NULL, \
609 NULL, (flags), (reg), (bit_idx), \
610 (clk_gate_flags), (lock))
611 /**
612 * devm_clk_hw_register_gate_parent_data - register a gate clock with the
613 * clock framework
614 * @dev: device that is registering this clock
615 * @name: name of this clock
616 * @parent_data: parent clk data
617 * @flags: framework-specific flags for this clock
618 * @reg: register address to control gating of this clock
619 * @bit_idx: which bit in the register controls gating of this clock
620 * @clk_gate_flags: gate-specific flags for this clock
621 * @lock: shared register lock for this clock
622 */
623 #define devm_clk_hw_register_gate_parent_data(dev, name, parent_data, flags, \
624 reg, bit_idx, clk_gate_flags, \
625 lock) \
626 __devm_clk_hw_register_gate((dev), NULL, (name), NULL, NULL, \
627 (parent_data), (flags), (reg), (bit_idx), \
628 (clk_gate_flags), (lock))
629
630 void clk_unregister_gate(struct clk *clk);
631 void clk_hw_unregister_gate(struct clk_hw *hw);
632 int clk_gate_is_enabled(struct clk_hw *hw);
633
634 struct clk_div_table {
635 unsigned int val;
636 unsigned int div;
637 };
638
639 /**
640 * struct clk_divider - adjustable divider clock
641 *
642 * @hw: handle between common and hardware-specific interfaces
643 * @reg: register containing the divider
644 * @shift: shift to the divider bit field
645 * @width: width of the divider bit field
646 * @table: array of value/divider pairs, last entry should have div = 0
647 * @lock: register lock
648 *
649 * Clock with an adjustable divider affecting its output frequency. Implements
650 * .recalc_rate, .set_rate and .round_rate
651 *
652 * @flags:
653 * CLK_DIVIDER_ONE_BASED - by default the divisor is the value read from the
654 * register plus one. If CLK_DIVIDER_ONE_BASED is set then the divider is
655 * the raw value read from the register, with the value of zero considered
656 * invalid, unless CLK_DIVIDER_ALLOW_ZERO is set.
657 * CLK_DIVIDER_POWER_OF_TWO - clock divisor is 2 raised to the value read from
658 * the hardware register
659 * CLK_DIVIDER_ALLOW_ZERO - Allow zero divisors. For dividers which have
660 * CLK_DIVIDER_ONE_BASED set, it is possible to end up with a zero divisor.
661 * Some hardware implementations gracefully handle this case and allow a
662 * zero divisor by not modifying their input clock
663 * (divide by one / bypass).
664 * CLK_DIVIDER_HIWORD_MASK - The divider settings are only in lower 16-bit
665 * of this register, and mask of divider bits are in higher 16-bit of this
666 * register. While setting the divider bits, higher 16-bit should also be
667 * updated to indicate changing divider bits.
668 * CLK_DIVIDER_ROUND_CLOSEST - Makes the best calculated divider to be rounded
669 * to the closest integer instead of the up one.
670 * CLK_DIVIDER_READ_ONLY - The divider settings are preconfigured and should
671 * not be changed by the clock framework.
672 * CLK_DIVIDER_MAX_AT_ZERO - For dividers which are like CLK_DIVIDER_ONE_BASED
673 * except when the value read from the register is zero, the divisor is
674 * 2^width of the field.
675 * CLK_DIVIDER_BIG_ENDIAN - By default little endian register accesses are used
676 * for the divider register. Setting this flag makes the register accesses
677 * big endian.
678 */
679 struct clk_divider {
680 struct clk_hw hw;
681 void __iomem *reg;
682 u8 shift;
683 u8 width;
684 u8 flags;
685 const struct clk_div_table *table;
686 spinlock_t *lock;
687 };
688
689 #define clk_div_mask(width) ((1 << (width)) - 1)
690 #define to_clk_divider(_hw) container_of(_hw, struct clk_divider, hw)
691
692 #define CLK_DIVIDER_ONE_BASED BIT(0)
693 #define CLK_DIVIDER_POWER_OF_TWO BIT(1)
694 #define CLK_DIVIDER_ALLOW_ZERO BIT(2)
695 #define CLK_DIVIDER_HIWORD_MASK BIT(3)
696 #define CLK_DIVIDER_ROUND_CLOSEST BIT(4)
697 #define CLK_DIVIDER_READ_ONLY BIT(5)
698 #define CLK_DIVIDER_MAX_AT_ZERO BIT(6)
699 #define CLK_DIVIDER_BIG_ENDIAN BIT(7)
700
701 extern const struct clk_ops clk_divider_ops;
702 extern const struct clk_ops clk_divider_ro_ops;
703
704 unsigned long divider_recalc_rate(struct clk_hw *hw, unsigned long parent_rate,
705 unsigned int val, const struct clk_div_table *table,
706 unsigned long flags, unsigned long width);
707 long divider_round_rate_parent(struct clk_hw *hw, struct clk_hw *parent,
708 unsigned long rate, unsigned long *prate,
709 const struct clk_div_table *table,
710 u8 width, unsigned long flags);
711 long divider_ro_round_rate_parent(struct clk_hw *hw, struct clk_hw *parent,
712 unsigned long rate, unsigned long *prate,
713 const struct clk_div_table *table, u8 width,
714 unsigned long flags, unsigned int val);
715 int divider_determine_rate(struct clk_hw *hw, struct clk_rate_request *req,
716 const struct clk_div_table *table, u8 width,
717 unsigned long flags);
718 int divider_ro_determine_rate(struct clk_hw *hw, struct clk_rate_request *req,
719 const struct clk_div_table *table, u8 width,
720 unsigned long flags, unsigned int val);
721 int divider_get_val(unsigned long rate, unsigned long parent_rate,
722 const struct clk_div_table *table, u8 width,
723 unsigned long flags);
724
725 struct clk_hw *__clk_hw_register_divider(struct device *dev,
726 struct device_node *np, const char *name,
727 const char *parent_name, const struct clk_hw *parent_hw,
728 const struct clk_parent_data *parent_data, unsigned long flags,
729 void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
730 const struct clk_div_table *table, spinlock_t *lock);
731 struct clk_hw *__devm_clk_hw_register_divider(struct device *dev,
732 struct device_node *np, const char *name,
733 const char *parent_name, const struct clk_hw *parent_hw,
734 const struct clk_parent_data *parent_data, unsigned long flags,
735 void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
736 const struct clk_div_table *table, spinlock_t *lock);
737 struct clk *clk_register_divider_table(struct device *dev, const char *name,
738 const char *parent_name, unsigned long flags,
739 void __iomem *reg, u8 shift, u8 width,
740 u8 clk_divider_flags, const struct clk_div_table *table,
741 spinlock_t *lock);
742 /**
743 * clk_register_divider - register a divider clock with the clock framework
744 * @dev: device registering this clock
745 * @name: name of this clock
746 * @parent_name: name of clock's parent
747 * @flags: framework-specific flags
748 * @reg: register address to adjust divider
749 * @shift: number of bits to shift the bitfield
750 * @width: width of the bitfield
751 * @clk_divider_flags: divider-specific flags for this clock
752 * @lock: shared register lock for this clock
753 */
754 #define clk_register_divider(dev, name, parent_name, flags, reg, shift, width, \
755 clk_divider_flags, lock) \
756 clk_register_divider_table((dev), (name), (parent_name), (flags), \
757 (reg), (shift), (width), \
758 (clk_divider_flags), NULL, (lock))
759 /**
760 * clk_hw_register_divider - register a divider clock with the clock framework
761 * @dev: device registering this clock
762 * @name: name of this clock
763 * @parent_name: name of clock's parent
764 * @flags: framework-specific flags
765 * @reg: register address to adjust divider
766 * @shift: number of bits to shift the bitfield
767 * @width: width of the bitfield
768 * @clk_divider_flags: divider-specific flags for this clock
769 * @lock: shared register lock for this clock
770 */
771 #define clk_hw_register_divider(dev, name, parent_name, flags, reg, shift, \
772 width, clk_divider_flags, lock) \
773 __clk_hw_register_divider((dev), NULL, (name), (parent_name), NULL, \
774 NULL, (flags), (reg), (shift), (width), \
775 (clk_divider_flags), NULL, (lock))
776 /**
777 * clk_hw_register_divider_parent_hw - register a divider clock with the clock
778 * framework
779 * @dev: device registering this clock
780 * @name: name of this clock
781 * @parent_hw: pointer to parent clk
782 * @flags: framework-specific flags
783 * @reg: register address to adjust divider
784 * @shift: number of bits to shift the bitfield
785 * @width: width of the bitfield
786 * @clk_divider_flags: divider-specific flags for this clock
787 * @lock: shared register lock for this clock
788 */
789 #define clk_hw_register_divider_parent_hw(dev, name, parent_hw, flags, reg, \
790 shift, width, clk_divider_flags, \
791 lock) \
792 __clk_hw_register_divider((dev), NULL, (name), NULL, (parent_hw), \
793 NULL, (flags), (reg), (shift), (width), \
794 (clk_divider_flags), NULL, (lock))
795 /**
796 * clk_hw_register_divider_parent_data - register a divider clock with the clock
797 * framework
798 * @dev: device registering this clock
799 * @name: name of this clock
800 * @parent_data: parent clk data
801 * @flags: framework-specific flags
802 * @reg: register address to adjust divider
803 * @shift: number of bits to shift the bitfield
804 * @width: width of the bitfield
805 * @clk_divider_flags: divider-specific flags for this clock
806 * @lock: shared register lock for this clock
807 */
808 #define clk_hw_register_divider_parent_data(dev, name, parent_data, flags, \
809 reg, shift, width, \
810 clk_divider_flags, lock) \
811 __clk_hw_register_divider((dev), NULL, (name), NULL, NULL, \
812 (parent_data), (flags), (reg), (shift), \
813 (width), (clk_divider_flags), NULL, (lock))
814 /**
815 * clk_hw_register_divider_table - register a table based divider clock with
816 * the clock framework
817 * @dev: device registering this clock
818 * @name: name of this clock
819 * @parent_name: name of clock's parent
820 * @flags: framework-specific flags
821 * @reg: register address to adjust divider
822 * @shift: number of bits to shift the bitfield
823 * @width: width of the bitfield
824 * @clk_divider_flags: divider-specific flags for this clock
825 * @table: array of divider/value pairs ending with a div set to 0
826 * @lock: shared register lock for this clock
827 */
828 #define clk_hw_register_divider_table(dev, name, parent_name, flags, reg, \
829 shift, width, clk_divider_flags, table, \
830 lock) \
831 __clk_hw_register_divider((dev), NULL, (name), (parent_name), NULL, \
832 NULL, (flags), (reg), (shift), (width), \
833 (clk_divider_flags), (table), (lock))
834 /**
835 * clk_hw_register_divider_table_parent_hw - register a table based divider
836 * clock with the clock framework
837 * @dev: device registering this clock
838 * @name: name of this clock
839 * @parent_hw: pointer to parent clk
840 * @flags: framework-specific flags
841 * @reg: register address to adjust divider
842 * @shift: number of bits to shift the bitfield
843 * @width: width of the bitfield
844 * @clk_divider_flags: divider-specific flags for this clock
845 * @table: array of divider/value pairs ending with a div set to 0
846 * @lock: shared register lock for this clock
847 */
848 #define clk_hw_register_divider_table_parent_hw(dev, name, parent_hw, flags, \
849 reg, shift, width, \
850 clk_divider_flags, table, \
851 lock) \
852 __clk_hw_register_divider((dev), NULL, (name), NULL, (parent_hw), \
853 NULL, (flags), (reg), (shift), (width), \
854 (clk_divider_flags), (table), (lock))
855 /**
856 * clk_hw_register_divider_table_parent_data - register a table based divider
857 * clock with the clock framework
858 * @dev: device registering this clock
859 * @name: name of this clock
860 * @parent_data: parent clk data
861 * @flags: framework-specific flags
862 * @reg: register address to adjust divider
863 * @shift: number of bits to shift the bitfield
864 * @width: width of the bitfield
865 * @clk_divider_flags: divider-specific flags for this clock
866 * @table: array of divider/value pairs ending with a div set to 0
867 * @lock: shared register lock for this clock
868 */
869 #define clk_hw_register_divider_table_parent_data(dev, name, parent_data, \
870 flags, reg, shift, width, \
871 clk_divider_flags, table, \
872 lock) \
873 __clk_hw_register_divider((dev), NULL, (name), NULL, NULL, \
874 (parent_data), (flags), (reg), (shift), \
875 (width), (clk_divider_flags), (table), \
876 (lock))
877 /**
878 * devm_clk_hw_register_divider - register a divider clock with the clock framework
879 * @dev: device registering this clock
880 * @name: name of this clock
881 * @parent_name: name of clock's parent
882 * @flags: framework-specific flags
883 * @reg: register address to adjust divider
884 * @shift: number of bits to shift the bitfield
885 * @width: width of the bitfield
886 * @clk_divider_flags: divider-specific flags for this clock
887 * @lock: shared register lock for this clock
888 */
889 #define devm_clk_hw_register_divider(dev, name, parent_name, flags, reg, shift, \
890 width, clk_divider_flags, lock) \
891 __devm_clk_hw_register_divider((dev), NULL, (name), (parent_name), NULL, \
892 NULL, (flags), (reg), (shift), (width), \
893 (clk_divider_flags), NULL, (lock))
894 /**
895 * devm_clk_hw_register_divider_parent_hw - register a divider clock with the clock framework
896 * @dev: device registering this clock
897 * @name: name of this clock
898 * @parent_hw: pointer to parent clk
899 * @flags: framework-specific flags
900 * @reg: register address to adjust divider
901 * @shift: number of bits to shift the bitfield
902 * @width: width of the bitfield
903 * @clk_divider_flags: divider-specific flags for this clock
904 * @lock: shared register lock for this clock
905 */
906 #define devm_clk_hw_register_divider_parent_hw(dev, name, parent_hw, flags, \
907 reg, shift, width, \
908 clk_divider_flags, lock) \
909 __devm_clk_hw_register_divider((dev), NULL, (name), NULL, \
910 (parent_hw), NULL, (flags), (reg), \
911 (shift), (width), (clk_divider_flags), \
912 NULL, (lock))
913 /**
914 * devm_clk_hw_register_divider_table - register a table based divider clock
915 * with the clock framework (devres variant)
916 * @dev: device registering this clock
917 * @name: name of this clock
918 * @parent_name: name of clock's parent
919 * @flags: framework-specific flags
920 * @reg: register address to adjust divider
921 * @shift: number of bits to shift the bitfield
922 * @width: width of the bitfield
923 * @clk_divider_flags: divider-specific flags for this clock
924 * @table: array of divider/value pairs ending with a div set to 0
925 * @lock: shared register lock for this clock
926 */
927 #define devm_clk_hw_register_divider_table(dev, name, parent_name, flags, \
928 reg, shift, width, \
929 clk_divider_flags, table, lock) \
930 __devm_clk_hw_register_divider((dev), NULL, (name), (parent_name), \
931 NULL, NULL, (flags), (reg), (shift), \
932 (width), (clk_divider_flags), (table), \
933 (lock))
934
935 void clk_unregister_divider(struct clk *clk);
936 void clk_hw_unregister_divider(struct clk_hw *hw);
937
938 /**
939 * struct clk_mux - multiplexer clock
940 *
941 * @hw: handle between common and hardware-specific interfaces
942 * @reg: register controlling multiplexer
943 * @table: array of register values corresponding to the parent index
944 * @shift: shift to multiplexer bit field
945 * @mask: mask of mutliplexer bit field
946 * @flags: hardware-specific flags
947 * @lock: register lock
948 *
949 * Clock with multiple selectable parents. Implements .get_parent, .set_parent
950 * and .recalc_rate
951 *
952 * Flags:
953 * CLK_MUX_INDEX_ONE - register index starts at 1, not 0
954 * CLK_MUX_INDEX_BIT - register index is a single bit (power of two)
955 * CLK_MUX_HIWORD_MASK - The mux settings are only in lower 16-bit of this
956 * register, and mask of mux bits are in higher 16-bit of this register.
957 * While setting the mux bits, higher 16-bit should also be updated to
958 * indicate changing mux bits.
959 * CLK_MUX_READ_ONLY - The mux registers can't be written, only read in the
960 * .get_parent clk_op.
961 * CLK_MUX_ROUND_CLOSEST - Use the parent rate that is closest to the desired
962 * frequency.
963 * CLK_MUX_BIG_ENDIAN - By default little endian register accesses are used for
964 * the mux register. Setting this flag makes the register accesses big
965 * endian.
966 */
967 struct clk_mux {
968 struct clk_hw hw;
969 void __iomem *reg;
970 const u32 *table;
971 u32 mask;
972 u8 shift;
973 u8 flags;
974 spinlock_t *lock;
975 };
976
977 #define to_clk_mux(_hw) container_of(_hw, struct clk_mux, hw)
978
979 #define CLK_MUX_INDEX_ONE BIT(0)
980 #define CLK_MUX_INDEX_BIT BIT(1)
981 #define CLK_MUX_HIWORD_MASK BIT(2)
982 #define CLK_MUX_READ_ONLY BIT(3) /* mux can't be changed */
983 #define CLK_MUX_ROUND_CLOSEST BIT(4)
984 #define CLK_MUX_BIG_ENDIAN BIT(5)
985
986 extern const struct clk_ops clk_mux_ops;
987 extern const struct clk_ops clk_mux_ro_ops;
988
989 struct clk_hw *__clk_hw_register_mux(struct device *dev, struct device_node *np,
990 const char *name, u8 num_parents,
991 const char * const *parent_names,
992 const struct clk_hw **parent_hws,
993 const struct clk_parent_data *parent_data,
994 unsigned long flags, void __iomem *reg, u8 shift, u32 mask,
995 u8 clk_mux_flags, const u32 *table, spinlock_t *lock);
996 struct clk_hw *__devm_clk_hw_register_mux(struct device *dev, struct device_node *np,
997 const char *name, u8 num_parents,
998 const char * const *parent_names,
999 const struct clk_hw **parent_hws,
1000 const struct clk_parent_data *parent_data,
1001 unsigned long flags, void __iomem *reg, u8 shift, u32 mask,
1002 u8 clk_mux_flags, const u32 *table, spinlock_t *lock);
1003 struct clk *clk_register_mux_table(struct device *dev, const char *name,
1004 const char * const *parent_names, u8 num_parents,
1005 unsigned long flags, void __iomem *reg, u8 shift, u32 mask,
1006 u8 clk_mux_flags, const u32 *table, spinlock_t *lock);
1007
1008 #define clk_register_mux(dev, name, parent_names, num_parents, flags, reg, \
1009 shift, width, clk_mux_flags, lock) \
1010 clk_register_mux_table((dev), (name), (parent_names), (num_parents), \
1011 (flags), (reg), (shift), BIT((width)) - 1, \
1012 (clk_mux_flags), NULL, (lock))
1013 #define clk_hw_register_mux_table(dev, name, parent_names, num_parents, \
1014 flags, reg, shift, mask, clk_mux_flags, \
1015 table, lock) \
1016 __clk_hw_register_mux((dev), NULL, (name), (num_parents), \
1017 (parent_names), NULL, NULL, (flags), (reg), \
1018 (shift), (mask), (clk_mux_flags), (table), \
1019 (lock))
1020 #define clk_hw_register_mux_table_parent_data(dev, name, parent_data, \
1021 num_parents, flags, reg, shift, mask, \
1022 clk_mux_flags, table, lock) \
1023 __clk_hw_register_mux((dev), NULL, (name), (num_parents), \
1024 NULL, NULL, (parent_data), (flags), (reg), \
1025 (shift), (mask), (clk_mux_flags), (table), \
1026 (lock))
1027 #define clk_hw_register_mux(dev, name, parent_names, num_parents, flags, reg, \
1028 shift, width, clk_mux_flags, lock) \
1029 __clk_hw_register_mux((dev), NULL, (name), (num_parents), \
1030 (parent_names), NULL, NULL, (flags), (reg), \
1031 (shift), BIT((width)) - 1, (clk_mux_flags), \
1032 NULL, (lock))
1033 #define clk_hw_register_mux_hws(dev, name, parent_hws, num_parents, flags, \
1034 reg, shift, width, clk_mux_flags, lock) \
1035 __clk_hw_register_mux((dev), NULL, (name), (num_parents), NULL, \
1036 (parent_hws), NULL, (flags), (reg), (shift), \
1037 BIT((width)) - 1, (clk_mux_flags), NULL, (lock))
1038 #define clk_hw_register_mux_parent_data(dev, name, parent_data, num_parents, \
1039 flags, reg, shift, width, \
1040 clk_mux_flags, lock) \
1041 __clk_hw_register_mux((dev), NULL, (name), (num_parents), NULL, NULL, \
1042 (parent_data), (flags), (reg), (shift), \
1043 BIT((width)) - 1, (clk_mux_flags), NULL, (lock))
1044 #define clk_hw_register_mux_parent_data_table(dev, name, parent_data, \
1045 num_parents, flags, reg, shift, \
1046 width, clk_mux_flags, table, \
1047 lock) \
1048 __clk_hw_register_mux((dev), NULL, (name), (num_parents), NULL, NULL, \
1049 (parent_data), (flags), (reg), (shift), \
1050 BIT((width)) - 1, (clk_mux_flags), table, (lock))
1051 #define devm_clk_hw_register_mux(dev, name, parent_names, num_parents, flags, reg, \
1052 shift, width, clk_mux_flags, lock) \
1053 __devm_clk_hw_register_mux((dev), NULL, (name), (num_parents), \
1054 (parent_names), NULL, NULL, (flags), (reg), \
1055 (shift), BIT((width)) - 1, (clk_mux_flags), \
1056 NULL, (lock))
1057 #define devm_clk_hw_register_mux_parent_hws(dev, name, parent_hws, \
1058 num_parents, flags, reg, shift, \
1059 width, clk_mux_flags, lock) \
1060 __devm_clk_hw_register_mux((dev), NULL, (name), (num_parents), NULL, \
1061 (parent_hws), NULL, (flags), (reg), \
1062 (shift), BIT((width)) - 1, \
1063 (clk_mux_flags), NULL, (lock))
1064 #define devm_clk_hw_register_mux_parent_data_table(dev, name, parent_data, \
1065 num_parents, flags, reg, shift, \
1066 width, clk_mux_flags, table, \
1067 lock) \
1068 __devm_clk_hw_register_mux((dev), NULL, (name), (num_parents), NULL, \
1069 NULL, (parent_data), (flags), (reg), (shift), \
1070 BIT((width)) - 1, (clk_mux_flags), table, (lock))
1071
1072 int clk_mux_val_to_index(struct clk_hw *hw, const u32 *table, unsigned int flags,
1073 unsigned int val);
1074 unsigned int clk_mux_index_to_val(const u32 *table, unsigned int flags, u8 index);
1075
1076 void clk_unregister_mux(struct clk *clk);
1077 void clk_hw_unregister_mux(struct clk_hw *hw);
1078
1079 void of_fixed_factor_clk_setup(struct device_node *node);
1080
1081 /**
1082 * struct clk_fixed_factor - fixed multiplier and divider clock
1083 *
1084 * @hw: handle between common and hardware-specific interfaces
1085 * @mult: multiplier
1086 * @div: divider
1087 *
1088 * Clock with a fixed multiplier and divider. The output frequency is the
1089 * parent clock rate divided by div and multiplied by mult.
1090 * Implements .recalc_rate, .set_rate and .round_rate
1091 */
1092
1093 struct clk_fixed_factor {
1094 struct clk_hw hw;
1095 unsigned int mult;
1096 unsigned int div;
1097 };
1098
1099 #define to_clk_fixed_factor(_hw) container_of(_hw, struct clk_fixed_factor, hw)
1100
1101 extern const struct clk_ops clk_fixed_factor_ops;
1102 struct clk *clk_register_fixed_factor(struct device *dev, const char *name,
1103 const char *parent_name, unsigned long flags,
1104 unsigned int mult, unsigned int div);
1105 void clk_unregister_fixed_factor(struct clk *clk);
1106 struct clk_hw *clk_hw_register_fixed_factor(struct device *dev,
1107 const char *name, const char *parent_name, unsigned long flags,
1108 unsigned int mult, unsigned int div);
1109 void clk_hw_unregister_fixed_factor(struct clk_hw *hw);
1110 struct clk_hw *devm_clk_hw_register_fixed_factor(struct device *dev,
1111 const char *name, const char *parent_name, unsigned long flags,
1112 unsigned int mult, unsigned int div);
1113 struct clk_hw *devm_clk_hw_register_fixed_factor_index(struct device *dev,
1114 const char *name, unsigned int index, unsigned long flags,
1115 unsigned int mult, unsigned int div);
1116
1117 struct clk_hw *devm_clk_hw_register_fixed_factor_parent_hw(struct device *dev,
1118 const char *name, const struct clk_hw *parent_hw,
1119 unsigned long flags, unsigned int mult, unsigned int div);
1120
1121 struct clk_hw *clk_hw_register_fixed_factor_parent_hw(struct device *dev,
1122 const char *name, const struct clk_hw *parent_hw,
1123 unsigned long flags, unsigned int mult, unsigned int div);
1124 /**
1125 * struct clk_fractional_divider - adjustable fractional divider clock
1126 *
1127 * @hw: handle between common and hardware-specific interfaces
1128 * @reg: register containing the divider
1129 * @mshift: shift to the numerator bit field
1130 * @mwidth: width of the numerator bit field
1131 * @nshift: shift to the denominator bit field
1132 * @nwidth: width of the denominator bit field
1133 * @approximation: clk driver's callback for calculating the divider clock
1134 * @lock: register lock
1135 *
1136 * Clock with adjustable fractional divider affecting its output frequency.
1137 *
1138 * @flags:
1139 * CLK_FRAC_DIVIDER_ZERO_BASED - by default the numerator and denominator
1140 * is the value read from the register. If CLK_FRAC_DIVIDER_ZERO_BASED
1141 * is set then the numerator and denominator are both the value read
1142 * plus one.
1143 * CLK_FRAC_DIVIDER_BIG_ENDIAN - By default little endian register accesses are
1144 * used for the divider register. Setting this flag makes the register
1145 * accesses big endian.
1146 * CLK_FRAC_DIVIDER_POWER_OF_TWO_PS - By default the resulting fraction might
1147 * be saturated and the caller will get quite far from the good enough
1148 * approximation. Instead the caller may require, by setting this flag,
1149 * to shift left by a few bits in case, when the asked one is quite small
1150 * to satisfy the desired range of denominator. It assumes that on the
1151 * caller's side the power-of-two capable prescaler exists.
1152 */
1153 struct clk_fractional_divider {
1154 struct clk_hw hw;
1155 void __iomem *reg;
1156 u8 mshift;
1157 u8 mwidth;
1158 u8 nshift;
1159 u8 nwidth;
1160 u8 flags;
1161 void (*approximation)(struct clk_hw *hw,
1162 unsigned long rate, unsigned long *parent_rate,
1163 unsigned long *m, unsigned long *n);
1164 spinlock_t *lock;
1165 };
1166
1167 #define to_clk_fd(_hw) container_of(_hw, struct clk_fractional_divider, hw)
1168
1169 #define CLK_FRAC_DIVIDER_ZERO_BASED BIT(0)
1170 #define CLK_FRAC_DIVIDER_BIG_ENDIAN BIT(1)
1171 #define CLK_FRAC_DIVIDER_POWER_OF_TWO_PS BIT(2)
1172
1173 struct clk *clk_register_fractional_divider(struct device *dev,
1174 const char *name, const char *parent_name, unsigned long flags,
1175 void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth,
1176 u8 clk_divider_flags, spinlock_t *lock);
1177 struct clk_hw *clk_hw_register_fractional_divider(struct device *dev,
1178 const char *name, const char *parent_name, unsigned long flags,
1179 void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth,
1180 u8 clk_divider_flags, spinlock_t *lock);
1181 void clk_hw_unregister_fractional_divider(struct clk_hw *hw);
1182
1183 /**
1184 * struct clk_multiplier - adjustable multiplier clock
1185 *
1186 * @hw: handle between common and hardware-specific interfaces
1187 * @reg: register containing the multiplier
1188 * @shift: shift to the multiplier bit field
1189 * @width: width of the multiplier bit field
1190 * @lock: register lock
1191 *
1192 * Clock with an adjustable multiplier affecting its output frequency.
1193 * Implements .recalc_rate, .set_rate and .round_rate
1194 *
1195 * @flags:
1196 * CLK_MULTIPLIER_ZERO_BYPASS - By default, the multiplier is the value read
1197 * from the register, with 0 being a valid value effectively
1198 * zeroing the output clock rate. If CLK_MULTIPLIER_ZERO_BYPASS is
1199 * set, then a null multiplier will be considered as a bypass,
1200 * leaving the parent rate unmodified.
1201 * CLK_MULTIPLIER_ROUND_CLOSEST - Makes the best calculated divider to be
1202 * rounded to the closest integer instead of the down one.
1203 * CLK_MULTIPLIER_BIG_ENDIAN - By default little endian register accesses are
1204 * used for the multiplier register. Setting this flag makes the register
1205 * accesses big endian.
1206 */
1207 struct clk_multiplier {
1208 struct clk_hw hw;
1209 void __iomem *reg;
1210 u8 shift;
1211 u8 width;
1212 u8 flags;
1213 spinlock_t *lock;
1214 };
1215
1216 #define to_clk_multiplier(_hw) container_of(_hw, struct clk_multiplier, hw)
1217
1218 #define CLK_MULTIPLIER_ZERO_BYPASS BIT(0)
1219 #define CLK_MULTIPLIER_ROUND_CLOSEST BIT(1)
1220 #define CLK_MULTIPLIER_BIG_ENDIAN BIT(2)
1221
1222 extern const struct clk_ops clk_multiplier_ops;
1223
1224 /***
1225 * struct clk_composite - aggregate clock of mux, divider and gate clocks
1226 *
1227 * @hw: handle between common and hardware-specific interfaces
1228 * @mux_hw: handle between composite and hardware-specific mux clock
1229 * @rate_hw: handle between composite and hardware-specific rate clock
1230 * @gate_hw: handle between composite and hardware-specific gate clock
1231 * @mux_ops: clock ops for mux
1232 * @rate_ops: clock ops for rate
1233 * @gate_ops: clock ops for gate
1234 */
1235 struct clk_composite {
1236 struct clk_hw hw;
1237 struct clk_ops ops;
1238
1239 struct clk_hw *mux_hw;
1240 struct clk_hw *rate_hw;
1241 struct clk_hw *gate_hw;
1242
1243 const struct clk_ops *mux_ops;
1244 const struct clk_ops *rate_ops;
1245 const struct clk_ops *gate_ops;
1246 };
1247
1248 #define to_clk_composite(_hw) container_of(_hw, struct clk_composite, hw)
1249
1250 struct clk *clk_register_composite(struct device *dev, const char *name,
1251 const char * const *parent_names, int num_parents,
1252 struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
1253 struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
1254 struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
1255 unsigned long flags);
1256 struct clk *clk_register_composite_pdata(struct device *dev, const char *name,
1257 const struct clk_parent_data *parent_data, int num_parents,
1258 struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
1259 struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
1260 struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
1261 unsigned long flags);
1262 void clk_unregister_composite(struct clk *clk);
1263 struct clk_hw *clk_hw_register_composite(struct device *dev, const char *name,
1264 const char * const *parent_names, int num_parents,
1265 struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
1266 struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
1267 struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
1268 unsigned long flags);
1269 struct clk_hw *clk_hw_register_composite_pdata(struct device *dev,
1270 const char *name,
1271 const struct clk_parent_data *parent_data, int num_parents,
1272 struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
1273 struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
1274 struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
1275 unsigned long flags);
1276 struct clk_hw *devm_clk_hw_register_composite_pdata(struct device *dev,
1277 const char *name, const struct clk_parent_data *parent_data,
1278 int num_parents,
1279 struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
1280 struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
1281 struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
1282 unsigned long flags);
1283 void clk_hw_unregister_composite(struct clk_hw *hw);
1284
1285 struct clk *clk_register(struct device *dev, struct clk_hw *hw);
1286 struct clk *devm_clk_register(struct device *dev, struct clk_hw *hw);
1287
1288 int __must_check clk_hw_register(struct device *dev, struct clk_hw *hw);
1289 int __must_check devm_clk_hw_register(struct device *dev, struct clk_hw *hw);
1290 int __must_check of_clk_hw_register(struct device_node *node, struct clk_hw *hw);
1291
1292 void clk_unregister(struct clk *clk);
1293
1294 void clk_hw_unregister(struct clk_hw *hw);
1295
1296 /* helper functions */
1297 const char *__clk_get_name(const struct clk *clk);
1298 const char *clk_hw_get_name(const struct clk_hw *hw);
1299 #ifdef CONFIG_COMMON_CLK
1300 struct clk_hw *__clk_get_hw(struct clk *clk);
1301 #else
__clk_get_hw(struct clk * clk)1302 static inline struct clk_hw *__clk_get_hw(struct clk *clk)
1303 {
1304 return (struct clk_hw *)clk;
1305 }
1306 #endif
1307
1308 struct clk *clk_hw_get_clk(struct clk_hw *hw, const char *con_id);
1309 struct clk *devm_clk_hw_get_clk(struct device *dev, struct clk_hw *hw,
1310 const char *con_id);
1311
1312 unsigned int clk_hw_get_num_parents(const struct clk_hw *hw);
1313 struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw);
1314 struct clk_hw *clk_hw_get_parent_by_index(const struct clk_hw *hw,
1315 unsigned int index);
1316 int clk_hw_get_parent_index(struct clk_hw *hw);
1317 int clk_hw_set_parent(struct clk_hw *hw, struct clk_hw *new_parent);
1318 unsigned int __clk_get_enable_count(struct clk *clk);
1319 unsigned long clk_hw_get_rate(const struct clk_hw *hw);
1320 unsigned long clk_hw_get_flags(const struct clk_hw *hw);
1321 #define clk_hw_can_set_rate_parent(hw) \
1322 (clk_hw_get_flags((hw)) & CLK_SET_RATE_PARENT)
1323
1324 bool clk_hw_is_prepared(const struct clk_hw *hw);
1325 bool clk_hw_rate_is_protected(const struct clk_hw *hw);
1326 bool clk_hw_is_enabled(const struct clk_hw *hw);
1327 bool __clk_is_enabled(struct clk *clk);
1328 struct clk *__clk_lookup(const char *name);
1329 int __clk_mux_determine_rate(struct clk_hw *hw,
1330 struct clk_rate_request *req);
1331 int __clk_determine_rate(struct clk_hw *core, struct clk_rate_request *req);
1332 int __clk_mux_determine_rate_closest(struct clk_hw *hw,
1333 struct clk_rate_request *req);
1334 int clk_mux_determine_rate_flags(struct clk_hw *hw,
1335 struct clk_rate_request *req,
1336 unsigned long flags);
1337 int clk_hw_determine_rate_no_reparent(struct clk_hw *hw,
1338 struct clk_rate_request *req);
1339 void clk_hw_reparent(struct clk_hw *hw, struct clk_hw *new_parent);
1340 void clk_hw_get_rate_range(struct clk_hw *hw, unsigned long *min_rate,
1341 unsigned long *max_rate);
1342 void clk_hw_set_rate_range(struct clk_hw *hw, unsigned long min_rate,
1343 unsigned long max_rate);
1344
__clk_hw_set_clk(struct clk_hw * dst,struct clk_hw * src)1345 static inline void __clk_hw_set_clk(struct clk_hw *dst, struct clk_hw *src)
1346 {
1347 dst->clk = src->clk;
1348 dst->core = src->core;
1349 }
1350
divider_round_rate(struct clk_hw * hw,unsigned long rate,unsigned long * prate,const struct clk_div_table * table,u8 width,unsigned long flags)1351 static inline long divider_round_rate(struct clk_hw *hw, unsigned long rate,
1352 unsigned long *prate,
1353 const struct clk_div_table *table,
1354 u8 width, unsigned long flags)
1355 {
1356 return divider_round_rate_parent(hw, clk_hw_get_parent(hw),
1357 rate, prate, table, width, flags);
1358 }
1359
divider_ro_round_rate(struct clk_hw * hw,unsigned long rate,unsigned long * prate,const struct clk_div_table * table,u8 width,unsigned long flags,unsigned int val)1360 static inline long divider_ro_round_rate(struct clk_hw *hw, unsigned long rate,
1361 unsigned long *prate,
1362 const struct clk_div_table *table,
1363 u8 width, unsigned long flags,
1364 unsigned int val)
1365 {
1366 return divider_ro_round_rate_parent(hw, clk_hw_get_parent(hw),
1367 rate, prate, table, width, flags,
1368 val);
1369 }
1370
1371 /*
1372 * FIXME clock api without lock protection
1373 */
1374 unsigned long clk_hw_round_rate(struct clk_hw *hw, unsigned long rate);
1375
1376 struct clk_onecell_data {
1377 struct clk **clks;
1378 unsigned int clk_num;
1379 };
1380
1381 struct clk_hw_onecell_data {
1382 unsigned int num;
1383 struct clk_hw *hws[] __counted_by(num);
1384 };
1385
1386 #define CLK_OF_DECLARE(name, compat, fn) \
1387 static void __init __##name##_of_clk_init_declare(struct device_node *np) \
1388 { \
1389 fn(np); \
1390 fwnode_dev_initialized(of_fwnode_handle(np), true); \
1391 } \
1392 OF_DECLARE_1(clk, name, compat, __##name##_of_clk_init_declare)
1393
1394 /*
1395 * Use this macro when you have a driver that requires two initialization
1396 * routines, one at of_clk_init(), and one at platform device probe
1397 */
1398 #define CLK_OF_DECLARE_DRIVER(name, compat, fn) \
1399 static void __init name##_of_clk_init_driver(struct device_node *np) \
1400 { \
1401 of_node_clear_flag(np, OF_POPULATED); \
1402 fn(np); \
1403 } \
1404 OF_DECLARE_1(clk, name, compat, name##_of_clk_init_driver)
1405
1406 #define CLK_HW_INIT(_name, _parent, _ops, _flags) \
1407 (&(struct clk_init_data) { \
1408 .flags = _flags, \
1409 .name = _name, \
1410 .parent_names = (const char *[]) { _parent }, \
1411 .num_parents = 1, \
1412 .ops = _ops, \
1413 })
1414
1415 #define CLK_HW_INIT_HW(_name, _parent, _ops, _flags) \
1416 (&(struct clk_init_data) { \
1417 .flags = _flags, \
1418 .name = _name, \
1419 .parent_hws = (const struct clk_hw*[]) { _parent }, \
1420 .num_parents = 1, \
1421 .ops = _ops, \
1422 })
1423
1424 /*
1425 * This macro is intended for drivers to be able to share the otherwise
1426 * individual struct clk_hw[] compound literals created by the compiler
1427 * when using CLK_HW_INIT_HW. It does NOT support multiple parents.
1428 */
1429 #define CLK_HW_INIT_HWS(_name, _parent, _ops, _flags) \
1430 (&(struct clk_init_data) { \
1431 .flags = _flags, \
1432 .name = _name, \
1433 .parent_hws = _parent, \
1434 .num_parents = 1, \
1435 .ops = _ops, \
1436 })
1437
1438 #define CLK_HW_INIT_FW_NAME(_name, _parent, _ops, _flags) \
1439 (&(struct clk_init_data) { \
1440 .flags = _flags, \
1441 .name = _name, \
1442 .parent_data = (const struct clk_parent_data[]) { \
1443 { .fw_name = _parent }, \
1444 }, \
1445 .num_parents = 1, \
1446 .ops = _ops, \
1447 })
1448
1449 #define CLK_HW_INIT_PARENTS(_name, _parents, _ops, _flags) \
1450 (&(struct clk_init_data) { \
1451 .flags = _flags, \
1452 .name = _name, \
1453 .parent_names = _parents, \
1454 .num_parents = ARRAY_SIZE(_parents), \
1455 .ops = _ops, \
1456 })
1457
1458 #define CLK_HW_INIT_PARENTS_HW(_name, _parents, _ops, _flags) \
1459 (&(struct clk_init_data) { \
1460 .flags = _flags, \
1461 .name = _name, \
1462 .parent_hws = _parents, \
1463 .num_parents = ARRAY_SIZE(_parents), \
1464 .ops = _ops, \
1465 })
1466
1467 #define CLK_HW_INIT_PARENTS_DATA(_name, _parents, _ops, _flags) \
1468 (&(struct clk_init_data) { \
1469 .flags = _flags, \
1470 .name = _name, \
1471 .parent_data = _parents, \
1472 .num_parents = ARRAY_SIZE(_parents), \
1473 .ops = _ops, \
1474 })
1475
1476 #define CLK_HW_INIT_NO_PARENT(_name, _ops, _flags) \
1477 (&(struct clk_init_data) { \
1478 .flags = _flags, \
1479 .name = _name, \
1480 .parent_names = NULL, \
1481 .num_parents = 0, \
1482 .ops = _ops, \
1483 })
1484
1485 #define CLK_FIXED_FACTOR(_struct, _name, _parent, \
1486 _div, _mult, _flags) \
1487 struct clk_fixed_factor _struct = { \
1488 .div = _div, \
1489 .mult = _mult, \
1490 .hw.init = CLK_HW_INIT(_name, \
1491 _parent, \
1492 &clk_fixed_factor_ops, \
1493 _flags), \
1494 }
1495
1496 #define CLK_FIXED_FACTOR_HW(_struct, _name, _parent, \
1497 _div, _mult, _flags) \
1498 struct clk_fixed_factor _struct = { \
1499 .div = _div, \
1500 .mult = _mult, \
1501 .hw.init = CLK_HW_INIT_HW(_name, \
1502 _parent, \
1503 &clk_fixed_factor_ops, \
1504 _flags), \
1505 }
1506
1507 /*
1508 * This macro allows the driver to reuse the _parent array for multiple
1509 * fixed factor clk declarations.
1510 */
1511 #define CLK_FIXED_FACTOR_HWS(_struct, _name, _parent, \
1512 _div, _mult, _flags) \
1513 struct clk_fixed_factor _struct = { \
1514 .div = _div, \
1515 .mult = _mult, \
1516 .hw.init = CLK_HW_INIT_HWS(_name, \
1517 _parent, \
1518 &clk_fixed_factor_ops, \
1519 _flags), \
1520 }
1521
1522 #define CLK_FIXED_FACTOR_FW_NAME(_struct, _name, _parent, \
1523 _div, _mult, _flags) \
1524 struct clk_fixed_factor _struct = { \
1525 .div = _div, \
1526 .mult = _mult, \
1527 .hw.init = CLK_HW_INIT_FW_NAME(_name, \
1528 _parent, \
1529 &clk_fixed_factor_ops, \
1530 _flags), \
1531 }
1532
1533 #ifdef CONFIG_OF
1534 int of_clk_add_provider(struct device_node *np,
1535 struct clk *(*clk_src_get)(struct of_phandle_args *args,
1536 void *data),
1537 void *data);
1538 int of_clk_add_hw_provider(struct device_node *np,
1539 struct clk_hw *(*get)(struct of_phandle_args *clkspec,
1540 void *data),
1541 void *data);
1542 int devm_of_clk_add_hw_provider(struct device *dev,
1543 struct clk_hw *(*get)(struct of_phandle_args *clkspec,
1544 void *data),
1545 void *data);
1546 void of_clk_del_provider(struct device_node *np);
1547
1548 struct clk *of_clk_src_simple_get(struct of_phandle_args *clkspec,
1549 void *data);
1550 struct clk_hw *of_clk_hw_simple_get(struct of_phandle_args *clkspec,
1551 void *data);
1552 struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data);
1553 struct clk_hw *of_clk_hw_onecell_get(struct of_phandle_args *clkspec,
1554 void *data);
1555 int of_clk_parent_fill(struct device_node *np, const char **parents,
1556 unsigned int size);
1557 int of_clk_detect_critical(struct device_node *np, int index,
1558 unsigned long *flags);
1559
1560 #else /* !CONFIG_OF */
1561
of_clk_add_provider(struct device_node * np,struct clk * (* clk_src_get)(struct of_phandle_args * args,void * data),void * data)1562 static inline int of_clk_add_provider(struct device_node *np,
1563 struct clk *(*clk_src_get)(struct of_phandle_args *args,
1564 void *data),
1565 void *data)
1566 {
1567 return 0;
1568 }
of_clk_add_hw_provider(struct device_node * np,struct clk_hw * (* get)(struct of_phandle_args * clkspec,void * data),void * data)1569 static inline int of_clk_add_hw_provider(struct device_node *np,
1570 struct clk_hw *(*get)(struct of_phandle_args *clkspec,
1571 void *data),
1572 void *data)
1573 {
1574 return 0;
1575 }
devm_of_clk_add_hw_provider(struct device * dev,struct clk_hw * (* get)(struct of_phandle_args * clkspec,void * data),void * data)1576 static inline int devm_of_clk_add_hw_provider(struct device *dev,
1577 struct clk_hw *(*get)(struct of_phandle_args *clkspec,
1578 void *data),
1579 void *data)
1580 {
1581 return 0;
1582 }
of_clk_del_provider(struct device_node * np)1583 static inline void of_clk_del_provider(struct device_node *np) {}
1584
of_clk_src_simple_get(struct of_phandle_args * clkspec,void * data)1585 static inline struct clk *of_clk_src_simple_get(
1586 struct of_phandle_args *clkspec, void *data)
1587 {
1588 return ERR_PTR(-ENOENT);
1589 }
1590 static inline struct clk_hw *
of_clk_hw_simple_get(struct of_phandle_args * clkspec,void * data)1591 of_clk_hw_simple_get(struct of_phandle_args *clkspec, void *data)
1592 {
1593 return ERR_PTR(-ENOENT);
1594 }
of_clk_src_onecell_get(struct of_phandle_args * clkspec,void * data)1595 static inline struct clk *of_clk_src_onecell_get(
1596 struct of_phandle_args *clkspec, void *data)
1597 {
1598 return ERR_PTR(-ENOENT);
1599 }
1600 static inline struct clk_hw *
of_clk_hw_onecell_get(struct of_phandle_args * clkspec,void * data)1601 of_clk_hw_onecell_get(struct of_phandle_args *clkspec, void *data)
1602 {
1603 return ERR_PTR(-ENOENT);
1604 }
of_clk_parent_fill(struct device_node * np,const char ** parents,unsigned int size)1605 static inline int of_clk_parent_fill(struct device_node *np,
1606 const char **parents, unsigned int size)
1607 {
1608 return 0;
1609 }
of_clk_detect_critical(struct device_node * np,int index,unsigned long * flags)1610 static inline int of_clk_detect_critical(struct device_node *np, int index,
1611 unsigned long *flags)
1612 {
1613 return 0;
1614 }
1615 #endif /* CONFIG_OF */
1616
1617 void clk_gate_restore_context(struct clk_hw *hw);
1618
1619 #endif /* CLK_PROVIDER_H */
1620