1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Copyright (c) 2010-2011 Jeremy Kerr <jeremy.kerr@canonical.com>
4 * Copyright (C) 2011-2012 Linaro Ltd <mturquette@linaro.org>
6 #ifndef __LINUX_CLK_PROVIDER_H
7 #define __LINUX_CLK_PROVIDER_H
10 #include <linux/of_clk.h>
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
17 * Please update clk_flags[] in drivers/clk/clk.c when making changes here!
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 */
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)
42 * struct clk_rate_request - Structure encoding the clk constraints that
43 * a clock user might require.
45 * Should be initialized by calling clk_hw_init_rate_request().
47 * @rate: Requested clock rate. This field will be adjusted by
48 * clock drivers according to hardware capabilities.
49 * @min_rate: Minimum rate imposed by clk users.
50 * @max_rate: Maximum rate imposed by clk users.
51 * @best_parent_rate: The best parent rate a parent can provide to fulfill the
52 * requested constraints.
53 * @best_parent_hw: The most appropriate parent clock that fulfills the
54 * requested constraints.
57 struct clk_rate_request {
59 unsigned long min_rate;
60 unsigned long max_rate;
61 unsigned long best_parent_rate;
62 struct clk_hw *best_parent_hw;
65 void clk_hw_init_rate_request(struct clk_hw * const hw,
66 struct clk_rate_request *req,
70 * struct clk_duty - Struture encoding the duty cycle ratio of a clock
72 * @num: Numerator of the duty cycle ratio
73 * @den: Denominator of the duty cycle ratio
81 * struct clk_ops - Callback operations for hardware clocks; these are to
82 * be provided by the clock implementation, and will be called by drivers
83 * through the clk_* api.
85 * @prepare: Prepare the clock for enabling. This must not return until
86 * the clock is fully prepared, and it's safe to call clk_enable.
87 * This callback is intended to allow clock implementations to
88 * do any initialisation that may sleep. Called with
91 * @unprepare: Release the clock from its prepared state. This will typically
92 * undo any work done in the @prepare callback. Called with
95 * @is_prepared: Queries the hardware to determine if the clock is prepared.
96 * This function is allowed to sleep. Optional, if this op is not
97 * set then the prepare count will be used.
99 * @unprepare_unused: Unprepare the clock atomically. Only called from
100 * clk_disable_unused for prepare clocks with special needs.
101 * Called with prepare mutex held. This function may sleep.
103 * @enable: Enable the clock atomically. This must not return until the
104 * clock is generating a valid clock signal, usable by consumer
105 * devices. Called with enable_lock held. This function must not
108 * @disable: Disable the clock atomically. Called with enable_lock held.
109 * This function must not sleep.
111 * @is_enabled: Queries the hardware to determine if the clock is enabled.
112 * This function must not sleep. Optional, if this op is not
113 * set then the enable count will be used.
115 * @disable_unused: Disable the clock atomically. Only called from
116 * clk_disable_unused for gate clocks with special needs.
117 * Called with enable_lock held. This function must not
120 * @save_context: Save the context of the clock in prepration for poweroff.
122 * @restore_context: Restore the context of the clock after a restoration
125 * @recalc_rate Recalculate the rate of this clock, by querying hardware. The
126 * parent rate is an input parameter. It is up to the caller to
127 * ensure that the prepare_mutex is held across this call.
128 * Returns the calculated rate. Optional, but recommended - if
129 * this op is not set then clock rate will be initialized to 0.
131 * @round_rate: Given a target rate as input, returns the closest rate actually
132 * supported by the clock. The parent rate is an input/output
135 * @determine_rate: Given a target rate as input, returns the closest rate
136 * actually supported by the clock, and optionally the parent clock
137 * that should be used to provide the clock rate.
139 * @set_parent: Change the input source of this clock; for clocks with multiple
140 * possible parents specify a new parent by passing in the index
141 * as a u8 corresponding to the parent in either the .parent_names
142 * or .parents arrays. This function in affect translates an
143 * array index into the value programmed into the hardware.
144 * Returns 0 on success, -EERROR otherwise.
146 * @get_parent: Queries the hardware to determine the parent of a clock. The
147 * return value is a u8 which specifies the index corresponding to
148 * the parent clock. This index can be applied to either the
149 * .parent_names or .parents arrays. In short, this function
150 * translates the parent value read from hardware into an array
151 * index. Currently only called when the clock is initialized by
152 * __clk_init. This callback is mandatory for clocks with
153 * multiple parents. It is optional (and unnecessary) for clocks
154 * with 0 or 1 parents.
156 * @set_rate: Change the rate of this clock. The requested rate is specified
157 * by the second argument, which should typically be the return
158 * of .round_rate call. The third argument gives the parent rate
159 * which is likely helpful for most .set_rate implementation.
160 * Returns 0 on success, -EERROR otherwise.
162 * @set_rate_and_parent: Change the rate and the parent of this clock. The
163 * requested rate is specified by the second argument, which
164 * should typically be the return of .round_rate call. The
165 * third argument gives the parent rate which is likely helpful
166 * for most .set_rate_and_parent implementation. The fourth
167 * argument gives the parent index. This callback is optional (and
168 * unnecessary) for clocks with 0 or 1 parents as well as
169 * for clocks that can tolerate switching the rate and the parent
170 * separately via calls to .set_parent and .set_rate.
171 * Returns 0 on success, -EERROR otherwise.
173 * @recalc_accuracy: Recalculate the accuracy of this clock. The clock accuracy
174 * is expressed in ppb (parts per billion). The parent accuracy is
175 * an input parameter.
176 * Returns the calculated accuracy. Optional - if this op is not
177 * set then clock accuracy will be initialized to parent accuracy
178 * or 0 (perfect clock) if clock has no parent.
180 * @get_phase: Queries the hardware to get the current phase of a clock.
181 * Returned values are 0-359 degrees on success, negative
182 * error codes on failure.
184 * @set_phase: Shift the phase this clock signal in degrees specified
185 * by the second argument. Valid values for degrees are
186 * 0-359. Return 0 on success, otherwise -EERROR.
188 * @get_duty_cycle: Queries the hardware to get the current duty cycle ratio
189 * of a clock. Returned values denominator cannot be 0 and must be
190 * superior or equal to the numerator.
192 * @set_duty_cycle: Apply the duty cycle ratio to this clock signal specified by
193 * the numerator (2nd argurment) and denominator (3rd argument).
194 * Argument must be a valid ratio (denominator > 0
195 * and >= numerator) Return 0 on success, otherwise -EERROR.
197 * @init: Perform platform-specific initialization magic.
198 * This is not used by any of the basic clock types.
199 * This callback exist for HW which needs to perform some
200 * initialisation magic for CCF to get an accurate view of the
201 * clock. It may also be used dynamic resource allocation is
202 * required. It shall not used to deal with clock parameters,
203 * such as rate or parents.
204 * Returns 0 on success, -EERROR otherwise.
206 * @terminate: Free any resource allocated by init.
208 * @debug_init: Set up type-specific debugfs entries for this clock. This
209 * is called once, after the debugfs directory entry for this
210 * clock has been created. The dentry pointer representing that
211 * directory is provided as an argument. Called with
212 * prepare_lock held. Returns 0 on success, -EERROR otherwise.
215 * The clk_enable/clk_disable and clk_prepare/clk_unprepare pairs allow
216 * implementations to split any work between atomic (enable) and sleepable
217 * (prepare) contexts. If enabling a clock requires code that might sleep,
218 * this must be done in clk_prepare. Clock enable code that will never be
219 * called in a sleepable context may be implemented in clk_enable.
221 * Typically, drivers will call clk_prepare when a clock may be needed later
222 * (eg. when a device is opened), and clk_enable when the clock is actually
223 * required (eg. from an interrupt). Note that clk_prepare MUST have been
224 * called before clk_enable.
227 int (*prepare)(struct clk_hw *hw);
228 void (*unprepare)(struct clk_hw *hw);
229 int (*is_prepared)(struct clk_hw *hw);
230 void (*unprepare_unused)(struct clk_hw *hw);
231 int (*enable)(struct clk_hw *hw);
232 void (*disable)(struct clk_hw *hw);
233 int (*is_enabled)(struct clk_hw *hw);
234 void (*disable_unused)(struct clk_hw *hw);
235 int (*save_context)(struct clk_hw *hw);
236 void (*restore_context)(struct clk_hw *hw);
237 unsigned long (*recalc_rate)(struct clk_hw *hw,
238 unsigned long parent_rate);
239 long (*round_rate)(struct clk_hw *hw, unsigned long rate,
240 unsigned long *parent_rate);
241 int (*determine_rate)(struct clk_hw *hw,
242 struct clk_rate_request *req);
243 int (*set_parent)(struct clk_hw *hw, u8 index);
244 u8 (*get_parent)(struct clk_hw *hw);
245 int (*set_rate)(struct clk_hw *hw, unsigned long rate,
246 unsigned long parent_rate);
247 int (*set_rate_and_parent)(struct clk_hw *hw,
249 unsigned long parent_rate, u8 index);
250 unsigned long (*recalc_accuracy)(struct clk_hw *hw,
251 unsigned long parent_accuracy);
252 int (*get_phase)(struct clk_hw *hw);
253 int (*set_phase)(struct clk_hw *hw, int degrees);
254 int (*get_duty_cycle)(struct clk_hw *hw,
255 struct clk_duty *duty);
256 int (*set_duty_cycle)(struct clk_hw *hw,
257 struct clk_duty *duty);
258 int (*init)(struct clk_hw *hw);
259 void (*terminate)(struct clk_hw *hw);
260 void (*debug_init)(struct clk_hw *hw, struct dentry *dentry);
264 * struct clk_parent_data - clk parent information
265 * @hw: parent clk_hw pointer (used for clk providers with internal clks)
266 * @fw_name: parent name local to provider registering clk
267 * @name: globally unique parent name (used as a fallback)
268 * @index: parent index local to provider registering clk (if @fw_name absent)
270 struct clk_parent_data {
271 const struct clk_hw *hw;
278 * struct clk_init_data - holds init data that's common to all clocks and is
279 * shared between the clock provider and the common clock framework.
282 * @ops: operations this clock supports
283 * @parent_names: array of string names for all possible parents
284 * @parent_data: array of parent data for all possible parents (when some
285 * parents are external to the clk controller)
286 * @parent_hws: array of pointers to all possible parents (when all parents
287 * are internal to the clk controller)
288 * @num_parents: number of possible parents
289 * @flags: framework-level hints and quirks
291 struct clk_init_data {
293 const struct clk_ops *ops;
294 /* Only one of the following three should be assigned */
295 const char * const *parent_names;
296 const struct clk_parent_data *parent_data;
297 const struct clk_hw **parent_hws;
303 * struct clk_hw - handle for traversing from a struct clk to its corresponding
304 * hardware-specific structure. struct clk_hw should be declared within struct
305 * clk_foo and then referenced by the struct clk instance that uses struct
308 * @core: pointer to the struct clk_core instance that points back to this
309 * struct clk_hw instance
311 * @clk: pointer to the per-user struct clk instance that can be used to call
314 * @init: pointer to struct clk_init_data that contains the init data shared
315 * with the common clock framework. This pointer will be set to NULL once
316 * a clk_register() variant is called on this clk_hw pointer.
319 struct clk_core *core;
321 const struct clk_init_data *init;
325 * DOC: Basic clock implementations common to many platforms
327 * Each basic clock hardware type is comprised of a structure describing the
328 * clock hardware, implementations of the relevant callbacks in struct clk_ops,
329 * unique flags for that hardware type, a registration function and an
330 * alternative macro for static initialization
334 * struct clk_fixed_rate - fixed-rate clock
335 * @hw: handle between common and hardware-specific interfaces
336 * @fixed_rate: constant frequency of clock
337 * @fixed_accuracy: constant accuracy of clock in ppb (parts per billion)
338 * @flags: hardware specific flags
341 * * CLK_FIXED_RATE_PARENT_ACCURACY - Use the accuracy of the parent clk
342 * instead of what's set in @fixed_accuracy.
344 struct clk_fixed_rate {
346 unsigned long fixed_rate;
347 unsigned long fixed_accuracy;
351 #define CLK_FIXED_RATE_PARENT_ACCURACY BIT(0)
353 extern const struct clk_ops clk_fixed_rate_ops;
354 struct clk_hw *__clk_hw_register_fixed_rate(struct device *dev,
355 struct device_node *np, const char *name,
356 const char *parent_name, const struct clk_hw *parent_hw,
357 const struct clk_parent_data *parent_data, unsigned long flags,
358 unsigned long fixed_rate, unsigned long fixed_accuracy,
359 unsigned long clk_fixed_flags);
360 struct clk *clk_register_fixed_rate(struct device *dev, const char *name,
361 const char *parent_name, unsigned long flags,
362 unsigned long fixed_rate);
364 * clk_hw_register_fixed_rate - register fixed-rate clock with the clock
366 * @dev: device that is registering this clock
367 * @name: name of this clock
368 * @parent_name: name of clock's parent
369 * @flags: framework-specific flags
370 * @fixed_rate: non-adjustable clock rate
372 #define clk_hw_register_fixed_rate(dev, name, parent_name, flags, fixed_rate) \
373 __clk_hw_register_fixed_rate((dev), NULL, (name), (parent_name), NULL, \
374 NULL, (flags), (fixed_rate), 0, 0)
376 * clk_hw_register_fixed_rate_parent_hw - register fixed-rate clock with
377 * the clock framework
378 * @dev: device that is registering this clock
379 * @name: name of this clock
380 * @parent_hw: pointer to parent clk
381 * @flags: framework-specific flags
382 * @fixed_rate: non-adjustable clock rate
384 #define clk_hw_register_fixed_rate_parent_hw(dev, name, parent_hw, flags, \
386 __clk_hw_register_fixed_rate((dev), NULL, (name), NULL, (parent_hw), \
387 NULL, (flags), (fixed_rate), 0, 0)
389 * clk_hw_register_fixed_rate_parent_data - register fixed-rate clock with
390 * the clock framework
391 * @dev: device that is registering this clock
392 * @name: name of this clock
393 * @parent_data: parent clk data
394 * @flags: framework-specific flags
395 * @fixed_rate: non-adjustable clock rate
397 #define clk_hw_register_fixed_rate_parent_data(dev, name, parent_hw, flags, \
399 __clk_hw_register_fixed_rate((dev), NULL, (name), NULL, NULL, \
400 (parent_data), (flags), (fixed_rate), 0, \
403 * clk_hw_register_fixed_rate_with_accuracy - register fixed-rate clock with
404 * the clock framework
405 * @dev: device that is registering this clock
406 * @name: name of this clock
407 * @parent_name: name of clock's parent
408 * @flags: framework-specific flags
409 * @fixed_rate: non-adjustable clock rate
410 * @fixed_accuracy: non-adjustable clock accuracy
412 #define clk_hw_register_fixed_rate_with_accuracy(dev, name, parent_name, \
415 __clk_hw_register_fixed_rate((dev), NULL, (name), (parent_name), \
416 NULL, NULL, (flags), (fixed_rate), \
419 * clk_hw_register_fixed_rate_with_accuracy_parent_hw - register fixed-rate
420 * clock with the clock framework
421 * @dev: device that is registering this clock
422 * @name: name of this clock
423 * @parent_hw: pointer to parent clk
424 * @flags: framework-specific flags
425 * @fixed_rate: non-adjustable clock rate
426 * @fixed_accuracy: non-adjustable clock accuracy
428 #define clk_hw_register_fixed_rate_with_accuracy_parent_hw(dev, name, \
429 parent_hw, flags, fixed_rate, fixed_accuracy) \
430 __clk_hw_register_fixed_rate((dev), NULL, (name), NULL, (parent_hw) \
431 NULL, NULL, (flags), (fixed_rate), \
434 * clk_hw_register_fixed_rate_with_accuracy_parent_data - register fixed-rate
435 * clock with the clock framework
436 * @dev: device that is registering this clock
437 * @name: name of this clock
438 * @parent_name: name of clock's parent
439 * @flags: framework-specific flags
440 * @fixed_rate: non-adjustable clock rate
441 * @fixed_accuracy: non-adjustable clock accuracy
443 #define clk_hw_register_fixed_rate_with_accuracy_parent_data(dev, name, \
444 parent_data, flags, fixed_rate, fixed_accuracy) \
445 __clk_hw_register_fixed_rate((dev), NULL, (name), NULL, NULL, \
446 (parent_data), NULL, (flags), \
447 (fixed_rate), (fixed_accuracy), 0)
449 void clk_unregister_fixed_rate(struct clk *clk);
450 void clk_hw_unregister_fixed_rate(struct clk_hw *hw);
452 void of_fixed_clk_setup(struct device_node *np);
455 * struct clk_gate - gating clock
457 * @hw: handle between common and hardware-specific interfaces
458 * @reg: register controlling gate
459 * @bit_idx: single bit controlling gate
460 * @flags: hardware-specific flags
461 * @lock: register lock
463 * Clock which can gate its output. Implements .enable & .disable
466 * CLK_GATE_SET_TO_DISABLE - by default this clock sets the bit at bit_idx to
467 * enable the clock. Setting this flag does the opposite: setting the bit
468 * disable the clock and clearing it enables the clock
469 * CLK_GATE_HIWORD_MASK - The gate settings are only in lower 16-bit
470 * of this register, and mask of gate bits are in higher 16-bit of this
471 * register. While setting the gate bits, higher 16-bit should also be
472 * updated to indicate changing gate bits.
473 * CLK_GATE_BIG_ENDIAN - by default little endian register accesses are used for
474 * the gate register. Setting this flag makes the register accesses big
485 #define to_clk_gate(_hw) container_of(_hw, struct clk_gate, hw)
487 #define CLK_GATE_SET_TO_DISABLE BIT(0)
488 #define CLK_GATE_HIWORD_MASK BIT(1)
489 #define CLK_GATE_BIG_ENDIAN BIT(2)
491 extern const struct clk_ops clk_gate_ops;
492 struct clk_hw *__clk_hw_register_gate(struct device *dev,
493 struct device_node *np, const char *name,
494 const char *parent_name, const struct clk_hw *parent_hw,
495 const struct clk_parent_data *parent_data,
497 void __iomem *reg, u8 bit_idx,
498 u8 clk_gate_flags, spinlock_t *lock);
499 struct clk *clk_register_gate(struct device *dev, const char *name,
500 const char *parent_name, unsigned long flags,
501 void __iomem *reg, u8 bit_idx,
502 u8 clk_gate_flags, spinlock_t *lock);
504 * clk_hw_register_gate - register a gate clock with the clock framework
505 * @dev: device that is registering this clock
506 * @name: name of this clock
507 * @parent_name: name of this clock's parent
508 * @flags: framework-specific flags for this clock
509 * @reg: register address to control gating of this clock
510 * @bit_idx: which bit in the register controls gating of this clock
511 * @clk_gate_flags: gate-specific flags for this clock
512 * @lock: shared register lock for this clock
514 #define clk_hw_register_gate(dev, name, parent_name, flags, reg, bit_idx, \
515 clk_gate_flags, lock) \
516 __clk_hw_register_gate((dev), NULL, (name), (parent_name), NULL, \
517 NULL, (flags), (reg), (bit_idx), \
518 (clk_gate_flags), (lock))
520 * clk_hw_register_gate_parent_hw - register a gate clock with the clock
522 * @dev: device that is registering this clock
523 * @name: name of this clock
524 * @parent_hw: pointer to parent clk
525 * @flags: framework-specific flags for this clock
526 * @reg: register address to control gating of this clock
527 * @bit_idx: which bit in the register controls gating of this clock
528 * @clk_gate_flags: gate-specific flags for this clock
529 * @lock: shared register lock for this clock
531 #define clk_hw_register_gate_parent_hw(dev, name, parent_hw, flags, reg, \
532 bit_idx, clk_gate_flags, lock) \
533 __clk_hw_register_gate((dev), NULL, (name), NULL, (parent_hw), \
534 NULL, (flags), (reg), (bit_idx), \
535 (clk_gate_flags), (lock))
537 * clk_hw_register_gate_parent_data - register a gate clock with the clock
539 * @dev: device that is registering this clock
540 * @name: name of this clock
541 * @parent_data: parent clk data
542 * @flags: framework-specific flags for this clock
543 * @reg: register address to control gating of this clock
544 * @bit_idx: which bit in the register controls gating of this clock
545 * @clk_gate_flags: gate-specific flags for this clock
546 * @lock: shared register lock for this clock
548 #define clk_hw_register_gate_parent_data(dev, name, parent_data, flags, reg, \
549 bit_idx, clk_gate_flags, lock) \
550 __clk_hw_register_gate((dev), NULL, (name), NULL, NULL, (parent_data), \
551 (flags), (reg), (bit_idx), \
552 (clk_gate_flags), (lock))
553 void clk_unregister_gate(struct clk *clk);
554 void clk_hw_unregister_gate(struct clk_hw *hw);
555 int clk_gate_is_enabled(struct clk_hw *hw);
557 struct clk_div_table {
563 * struct clk_divider - adjustable divider clock
565 * @hw: handle between common and hardware-specific interfaces
566 * @reg: register containing the divider
567 * @shift: shift to the divider bit field
568 * @width: width of the divider bit field
569 * @table: array of value/divider pairs, last entry should have div = 0
570 * @lock: register lock
572 * Clock with an adjustable divider affecting its output frequency. Implements
573 * .recalc_rate, .set_rate and .round_rate
576 * CLK_DIVIDER_ONE_BASED - by default the divisor is the value read from the
577 * register plus one. If CLK_DIVIDER_ONE_BASED is set then the divider is
578 * the raw value read from the register, with the value of zero considered
579 * invalid, unless CLK_DIVIDER_ALLOW_ZERO is set.
580 * CLK_DIVIDER_POWER_OF_TWO - clock divisor is 2 raised to the value read from
581 * the hardware register
582 * CLK_DIVIDER_ALLOW_ZERO - Allow zero divisors. For dividers which have
583 * CLK_DIVIDER_ONE_BASED set, it is possible to end up with a zero divisor.
584 * Some hardware implementations gracefully handle this case and allow a
585 * zero divisor by not modifying their input clock
586 * (divide by one / bypass).
587 * CLK_DIVIDER_HIWORD_MASK - The divider settings are only in lower 16-bit
588 * of this register, and mask of divider bits are in higher 16-bit of this
589 * register. While setting the divider bits, higher 16-bit should also be
590 * updated to indicate changing divider bits.
591 * CLK_DIVIDER_ROUND_CLOSEST - Makes the best calculated divider to be rounded
592 * to the closest integer instead of the up one.
593 * CLK_DIVIDER_READ_ONLY - The divider settings are preconfigured and should
594 * not be changed by the clock framework.
595 * CLK_DIVIDER_MAX_AT_ZERO - For dividers which are like CLK_DIVIDER_ONE_BASED
596 * except when the value read from the register is zero, the divisor is
597 * 2^width of the field.
598 * CLK_DIVIDER_BIG_ENDIAN - By default little endian register accesses are used
599 * for the divider register. Setting this flag makes the register accesses
608 const struct clk_div_table *table;
612 #define clk_div_mask(width) ((1 << (width)) - 1)
613 #define to_clk_divider(_hw) container_of(_hw, struct clk_divider, hw)
615 #define CLK_DIVIDER_ONE_BASED BIT(0)
616 #define CLK_DIVIDER_POWER_OF_TWO BIT(1)
617 #define CLK_DIVIDER_ALLOW_ZERO BIT(2)
618 #define CLK_DIVIDER_HIWORD_MASK BIT(3)
619 #define CLK_DIVIDER_ROUND_CLOSEST BIT(4)
620 #define CLK_DIVIDER_READ_ONLY BIT(5)
621 #define CLK_DIVIDER_MAX_AT_ZERO BIT(6)
622 #define CLK_DIVIDER_BIG_ENDIAN BIT(7)
624 extern const struct clk_ops clk_divider_ops;
625 extern const struct clk_ops clk_divider_ro_ops;
627 unsigned long divider_recalc_rate(struct clk_hw *hw, unsigned long parent_rate,
628 unsigned int val, const struct clk_div_table *table,
629 unsigned long flags, unsigned long width);
630 long divider_round_rate_parent(struct clk_hw *hw, struct clk_hw *parent,
631 unsigned long rate, unsigned long *prate,
632 const struct clk_div_table *table,
633 u8 width, unsigned long flags);
634 long divider_ro_round_rate_parent(struct clk_hw *hw, struct clk_hw *parent,
635 unsigned long rate, unsigned long *prate,
636 const struct clk_div_table *table, u8 width,
637 unsigned long flags, unsigned int val);
638 int divider_determine_rate(struct clk_hw *hw, struct clk_rate_request *req,
639 const struct clk_div_table *table, u8 width,
640 unsigned long flags);
641 int divider_ro_determine_rate(struct clk_hw *hw, struct clk_rate_request *req,
642 const struct clk_div_table *table, u8 width,
643 unsigned long flags, unsigned int val);
644 int divider_get_val(unsigned long rate, unsigned long parent_rate,
645 const struct clk_div_table *table, u8 width,
646 unsigned long flags);
648 struct clk_hw *__clk_hw_register_divider(struct device *dev,
649 struct device_node *np, const char *name,
650 const char *parent_name, const struct clk_hw *parent_hw,
651 const struct clk_parent_data *parent_data, unsigned long flags,
652 void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
653 const struct clk_div_table *table, spinlock_t *lock);
654 struct clk_hw *__devm_clk_hw_register_divider(struct device *dev,
655 struct device_node *np, const char *name,
656 const char *parent_name, const struct clk_hw *parent_hw,
657 const struct clk_parent_data *parent_data, unsigned long flags,
658 void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags,
659 const struct clk_div_table *table, spinlock_t *lock);
660 struct clk *clk_register_divider_table(struct device *dev, const char *name,
661 const char *parent_name, unsigned long flags,
662 void __iomem *reg, u8 shift, u8 width,
663 u8 clk_divider_flags, const struct clk_div_table *table,
666 * clk_register_divider - register a divider clock with the clock framework
667 * @dev: device registering this clock
668 * @name: name of this clock
669 * @parent_name: name of clock's parent
670 * @flags: framework-specific flags
671 * @reg: register address to adjust divider
672 * @shift: number of bits to shift the bitfield
673 * @width: width of the bitfield
674 * @clk_divider_flags: divider-specific flags for this clock
675 * @lock: shared register lock for this clock
677 #define clk_register_divider(dev, name, parent_name, flags, reg, shift, width, \
678 clk_divider_flags, lock) \
679 clk_register_divider_table((dev), (name), (parent_name), (flags), \
680 (reg), (shift), (width), \
681 (clk_divider_flags), NULL, (lock))
683 * clk_hw_register_divider - register a divider clock with the clock framework
684 * @dev: device registering this clock
685 * @name: name of this clock
686 * @parent_name: name of clock's parent
687 * @flags: framework-specific flags
688 * @reg: register address to adjust divider
689 * @shift: number of bits to shift the bitfield
690 * @width: width of the bitfield
691 * @clk_divider_flags: divider-specific flags for this clock
692 * @lock: shared register lock for this clock
694 #define clk_hw_register_divider(dev, name, parent_name, flags, reg, shift, \
695 width, clk_divider_flags, lock) \
696 __clk_hw_register_divider((dev), NULL, (name), (parent_name), NULL, \
697 NULL, (flags), (reg), (shift), (width), \
698 (clk_divider_flags), NULL, (lock))
700 * clk_hw_register_divider_parent_hw - register a divider clock with the clock
702 * @dev: device registering this clock
703 * @name: name of this clock
704 * @parent_hw: pointer to parent clk
705 * @flags: framework-specific flags
706 * @reg: register address to adjust divider
707 * @shift: number of bits to shift the bitfield
708 * @width: width of the bitfield
709 * @clk_divider_flags: divider-specific flags for this clock
710 * @lock: shared register lock for this clock
712 #define clk_hw_register_divider_parent_hw(dev, name, parent_hw, flags, reg, \
713 shift, width, clk_divider_flags, \
715 __clk_hw_register_divider((dev), NULL, (name), NULL, (parent_hw), \
716 NULL, (flags), (reg), (shift), (width), \
717 (clk_divider_flags), NULL, (lock))
719 * clk_hw_register_divider_parent_data - register a divider clock with the clock
721 * @dev: device registering this clock
722 * @name: name of this clock
723 * @parent_data: parent clk data
724 * @flags: framework-specific flags
725 * @reg: register address to adjust divider
726 * @shift: number of bits to shift the bitfield
727 * @width: width of the bitfield
728 * @clk_divider_flags: divider-specific flags for this clock
729 * @lock: shared register lock for this clock
731 #define clk_hw_register_divider_parent_data(dev, name, parent_data, flags, \
733 clk_divider_flags, lock) \
734 __clk_hw_register_divider((dev), NULL, (name), NULL, NULL, \
735 (parent_data), (flags), (reg), (shift), \
736 (width), (clk_divider_flags), NULL, (lock))
738 * clk_hw_register_divider_table - register a table based divider clock with
739 * the clock framework
740 * @dev: device registering this clock
741 * @name: name of this clock
742 * @parent_name: name of clock's parent
743 * @flags: framework-specific flags
744 * @reg: register address to adjust divider
745 * @shift: number of bits to shift the bitfield
746 * @width: width of the bitfield
747 * @clk_divider_flags: divider-specific flags for this clock
748 * @table: array of divider/value pairs ending with a div set to 0
749 * @lock: shared register lock for this clock
751 #define clk_hw_register_divider_table(dev, name, parent_name, flags, reg, \
752 shift, width, clk_divider_flags, table, \
754 __clk_hw_register_divider((dev), NULL, (name), (parent_name), NULL, \
755 NULL, (flags), (reg), (shift), (width), \
756 (clk_divider_flags), (table), (lock))
758 * clk_hw_register_divider_table_parent_hw - register a table based divider
759 * clock with the clock framework
760 * @dev: device registering this clock
761 * @name: name of this clock
762 * @parent_hw: pointer to parent clk
763 * @flags: framework-specific flags
764 * @reg: register address to adjust divider
765 * @shift: number of bits to shift the bitfield
766 * @width: width of the bitfield
767 * @clk_divider_flags: divider-specific flags for this clock
768 * @table: array of divider/value pairs ending with a div set to 0
769 * @lock: shared register lock for this clock
771 #define clk_hw_register_divider_table_parent_hw(dev, name, parent_hw, flags, \
773 clk_divider_flags, table, \
775 __clk_hw_register_divider((dev), NULL, (name), NULL, (parent_hw), \
776 NULL, (flags), (reg), (shift), (width), \
777 (clk_divider_flags), (table), (lock))
779 * clk_hw_register_divider_table_parent_data - register a table based divider
780 * clock with the clock framework
781 * @dev: device registering this clock
782 * @name: name of this clock
783 * @parent_data: parent clk data
784 * @flags: framework-specific flags
785 * @reg: register address to adjust divider
786 * @shift: number of bits to shift the bitfield
787 * @width: width of the bitfield
788 * @clk_divider_flags: divider-specific flags for this clock
789 * @table: array of divider/value pairs ending with a div set to 0
790 * @lock: shared register lock for this clock
792 #define clk_hw_register_divider_table_parent_data(dev, name, parent_data, \
793 flags, reg, shift, width, \
794 clk_divider_flags, table, \
796 __clk_hw_register_divider((dev), NULL, (name), NULL, NULL, \
797 (parent_data), (flags), (reg), (shift), \
798 (width), (clk_divider_flags), (table), \
801 * devm_clk_hw_register_divider - register a divider clock with the clock framework
802 * @dev: device registering this clock
803 * @name: name of this clock
804 * @parent_name: name of clock's parent
805 * @flags: framework-specific flags
806 * @reg: register address to adjust divider
807 * @shift: number of bits to shift the bitfield
808 * @width: width of the bitfield
809 * @clk_divider_flags: divider-specific flags for this clock
810 * @lock: shared register lock for this clock
812 #define devm_clk_hw_register_divider(dev, name, parent_name, flags, reg, shift, \
813 width, clk_divider_flags, lock) \
814 __devm_clk_hw_register_divider((dev), NULL, (name), (parent_name), NULL, \
815 NULL, (flags), (reg), (shift), (width), \
816 (clk_divider_flags), NULL, (lock))
818 * devm_clk_hw_register_divider_table - register a table based divider clock
819 * with the clock framework (devres variant)
820 * @dev: device registering this clock
821 * @name: name of this clock
822 * @parent_name: name of clock's parent
823 * @flags: framework-specific flags
824 * @reg: register address to adjust divider
825 * @shift: number of bits to shift the bitfield
826 * @width: width of the bitfield
827 * @clk_divider_flags: divider-specific flags for this clock
828 * @table: array of divider/value pairs ending with a div set to 0
829 * @lock: shared register lock for this clock
831 #define devm_clk_hw_register_divider_table(dev, name, parent_name, flags, \
833 clk_divider_flags, table, lock) \
834 __devm_clk_hw_register_divider((dev), NULL, (name), (parent_name), \
835 NULL, NULL, (flags), (reg), (shift), \
836 (width), (clk_divider_flags), (table), \
839 void clk_unregister_divider(struct clk *clk);
840 void clk_hw_unregister_divider(struct clk_hw *hw);
843 * struct clk_mux - multiplexer clock
845 * @hw: handle between common and hardware-specific interfaces
846 * @reg: register controlling multiplexer
847 * @table: array of register values corresponding to the parent index
848 * @shift: shift to multiplexer bit field
849 * @mask: mask of mutliplexer bit field
850 * @flags: hardware-specific flags
851 * @lock: register lock
853 * Clock with multiple selectable parents. Implements .get_parent, .set_parent
857 * CLK_MUX_INDEX_ONE - register index starts at 1, not 0
858 * CLK_MUX_INDEX_BIT - register index is a single bit (power of two)
859 * CLK_MUX_HIWORD_MASK - The mux settings are only in lower 16-bit of this
860 * register, and mask of mux bits are in higher 16-bit of this register.
861 * While setting the mux bits, higher 16-bit should also be updated to
862 * indicate changing mux bits.
863 * CLK_MUX_READ_ONLY - The mux registers can't be written, only read in the
864 * .get_parent clk_op.
865 * CLK_MUX_ROUND_CLOSEST - Use the parent rate that is closest to the desired
867 * CLK_MUX_BIG_ENDIAN - By default little endian register accesses are used for
868 * the mux register. Setting this flag makes the register accesses big
881 #define to_clk_mux(_hw) container_of(_hw, struct clk_mux, hw)
883 #define CLK_MUX_INDEX_ONE BIT(0)
884 #define CLK_MUX_INDEX_BIT BIT(1)
885 #define CLK_MUX_HIWORD_MASK BIT(2)
886 #define CLK_MUX_READ_ONLY BIT(3) /* mux can't be changed */
887 #define CLK_MUX_ROUND_CLOSEST BIT(4)
888 #define CLK_MUX_BIG_ENDIAN BIT(5)
890 extern const struct clk_ops clk_mux_ops;
891 extern const struct clk_ops clk_mux_ro_ops;
893 struct clk_hw *__clk_hw_register_mux(struct device *dev, struct device_node *np,
894 const char *name, u8 num_parents,
895 const char * const *parent_names,
896 const struct clk_hw **parent_hws,
897 const struct clk_parent_data *parent_data,
898 unsigned long flags, void __iomem *reg, u8 shift, u32 mask,
899 u8 clk_mux_flags, u32 *table, spinlock_t *lock);
900 struct clk_hw *__devm_clk_hw_register_mux(struct device *dev, struct device_node *np,
901 const char *name, u8 num_parents,
902 const char * const *parent_names,
903 const struct clk_hw **parent_hws,
904 const struct clk_parent_data *parent_data,
905 unsigned long flags, void __iomem *reg, u8 shift, u32 mask,
906 u8 clk_mux_flags, u32 *table, spinlock_t *lock);
907 struct clk *clk_register_mux_table(struct device *dev, const char *name,
908 const char * const *parent_names, u8 num_parents,
909 unsigned long flags, void __iomem *reg, u8 shift, u32 mask,
910 u8 clk_mux_flags, u32 *table, spinlock_t *lock);
912 #define clk_register_mux(dev, name, parent_names, num_parents, flags, reg, \
913 shift, width, clk_mux_flags, lock) \
914 clk_register_mux_table((dev), (name), (parent_names), (num_parents), \
915 (flags), (reg), (shift), BIT((width)) - 1, \
916 (clk_mux_flags), NULL, (lock))
917 #define clk_hw_register_mux_table(dev, name, parent_names, num_parents, \
918 flags, reg, shift, mask, clk_mux_flags, \
920 __clk_hw_register_mux((dev), NULL, (name), (num_parents), \
921 (parent_names), NULL, NULL, (flags), (reg), \
922 (shift), (mask), (clk_mux_flags), (table), \
924 #define clk_hw_register_mux(dev, name, parent_names, num_parents, flags, reg, \
925 shift, width, clk_mux_flags, lock) \
926 __clk_hw_register_mux((dev), NULL, (name), (num_parents), \
927 (parent_names), NULL, NULL, (flags), (reg), \
928 (shift), BIT((width)) - 1, (clk_mux_flags), \
930 #define clk_hw_register_mux_hws(dev, name, parent_hws, num_parents, flags, \
931 reg, shift, width, clk_mux_flags, lock) \
932 __clk_hw_register_mux((dev), NULL, (name), (num_parents), NULL, \
933 (parent_hws), NULL, (flags), (reg), (shift), \
934 BIT((width)) - 1, (clk_mux_flags), NULL, (lock))
935 #define clk_hw_register_mux_parent_data(dev, name, parent_data, num_parents, \
936 flags, reg, shift, width, \
937 clk_mux_flags, lock) \
938 __clk_hw_register_mux((dev), NULL, (name), (num_parents), NULL, NULL, \
939 (parent_data), (flags), (reg), (shift), \
940 BIT((width)) - 1, (clk_mux_flags), NULL, (lock))
941 #define devm_clk_hw_register_mux(dev, name, parent_names, num_parents, flags, reg, \
942 shift, width, clk_mux_flags, lock) \
943 __devm_clk_hw_register_mux((dev), NULL, (name), (num_parents), \
944 (parent_names), NULL, NULL, (flags), (reg), \
945 (shift), BIT((width)) - 1, (clk_mux_flags), \
948 int clk_mux_val_to_index(struct clk_hw *hw, u32 *table, unsigned int flags,
950 unsigned int clk_mux_index_to_val(u32 *table, unsigned int flags, u8 index);
952 void clk_unregister_mux(struct clk *clk);
953 void clk_hw_unregister_mux(struct clk_hw *hw);
955 void of_fixed_factor_clk_setup(struct device_node *node);
958 * struct clk_fixed_factor - fixed multiplier and divider clock
960 * @hw: handle between common and hardware-specific interfaces
964 * Clock with a fixed multiplier and divider. The output frequency is the
965 * parent clock rate divided by div and multiplied by mult.
966 * Implements .recalc_rate, .set_rate and .round_rate
969 struct clk_fixed_factor {
975 #define to_clk_fixed_factor(_hw) container_of(_hw, struct clk_fixed_factor, hw)
977 extern const struct clk_ops clk_fixed_factor_ops;
978 struct clk *clk_register_fixed_factor(struct device *dev, const char *name,
979 const char *parent_name, unsigned long flags,
980 unsigned int mult, unsigned int div);
981 void clk_unregister_fixed_factor(struct clk *clk);
982 struct clk_hw *clk_hw_register_fixed_factor(struct device *dev,
983 const char *name, const char *parent_name, unsigned long flags,
984 unsigned int mult, unsigned int div);
985 void clk_hw_unregister_fixed_factor(struct clk_hw *hw);
986 struct clk_hw *devm_clk_hw_register_fixed_factor(struct device *dev,
987 const char *name, const char *parent_name, unsigned long flags,
988 unsigned int mult, unsigned int div);
990 * struct clk_fractional_divider - adjustable fractional divider clock
992 * @hw: handle between common and hardware-specific interfaces
993 * @reg: register containing the divider
994 * @mshift: shift to the numerator bit field
995 * @mwidth: width of the numerator bit field
996 * @nshift: shift to the denominator bit field
997 * @nwidth: width of the denominator bit field
998 * @lock: register lock
1000 * Clock with adjustable fractional divider affecting its output frequency.
1003 * CLK_FRAC_DIVIDER_ZERO_BASED - by default the numerator and denominator
1004 * is the value read from the register. If CLK_FRAC_DIVIDER_ZERO_BASED
1005 * is set then the numerator and denominator are both the value read
1007 * CLK_FRAC_DIVIDER_BIG_ENDIAN - By default little endian register accesses are
1008 * used for the divider register. Setting this flag makes the register
1009 * accesses big endian.
1010 * CLK_FRAC_DIVIDER_POWER_OF_TWO_PS - By default the resulting fraction might
1011 * be saturated and the caller will get quite far from the good enough
1012 * approximation. Instead the caller may require, by setting this flag,
1013 * to shift left by a few bits in case, when the asked one is quite small
1014 * to satisfy the desired range of denominator. It assumes that on the
1015 * caller's side the power-of-two capable prescaler exists.
1017 struct clk_fractional_divider {
1027 void (*approximation)(struct clk_hw *hw,
1028 unsigned long rate, unsigned long *parent_rate,
1029 unsigned long *m, unsigned long *n);
1033 #define to_clk_fd(_hw) container_of(_hw, struct clk_fractional_divider, hw)
1035 #define CLK_FRAC_DIVIDER_ZERO_BASED BIT(0)
1036 #define CLK_FRAC_DIVIDER_BIG_ENDIAN BIT(1)
1037 #define CLK_FRAC_DIVIDER_POWER_OF_TWO_PS BIT(2)
1039 struct clk *clk_register_fractional_divider(struct device *dev,
1040 const char *name, const char *parent_name, unsigned long flags,
1041 void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth,
1042 u8 clk_divider_flags, spinlock_t *lock);
1043 struct clk_hw *clk_hw_register_fractional_divider(struct device *dev,
1044 const char *name, const char *parent_name, unsigned long flags,
1045 void __iomem *reg, u8 mshift, u8 mwidth, u8 nshift, u8 nwidth,
1046 u8 clk_divider_flags, spinlock_t *lock);
1047 void clk_hw_unregister_fractional_divider(struct clk_hw *hw);
1050 * struct clk_multiplier - adjustable multiplier clock
1052 * @hw: handle between common and hardware-specific interfaces
1053 * @reg: register containing the multiplier
1054 * @shift: shift to the multiplier bit field
1055 * @width: width of the multiplier bit field
1056 * @lock: register lock
1058 * Clock with an adjustable multiplier affecting its output frequency.
1059 * Implements .recalc_rate, .set_rate and .round_rate
1062 * CLK_MULTIPLIER_ZERO_BYPASS - By default, the multiplier is the value read
1063 * from the register, with 0 being a valid value effectively
1064 * zeroing the output clock rate. If CLK_MULTIPLIER_ZERO_BYPASS is
1065 * set, then a null multiplier will be considered as a bypass,
1066 * leaving the parent rate unmodified.
1067 * CLK_MULTIPLIER_ROUND_CLOSEST - Makes the best calculated divider to be
1068 * rounded to the closest integer instead of the down one.
1069 * CLK_MULTIPLIER_BIG_ENDIAN - By default little endian register accesses are
1070 * used for the multiplier register. Setting this flag makes the register
1071 * accesses big endian.
1073 struct clk_multiplier {
1082 #define to_clk_multiplier(_hw) container_of(_hw, struct clk_multiplier, hw)
1084 #define CLK_MULTIPLIER_ZERO_BYPASS BIT(0)
1085 #define CLK_MULTIPLIER_ROUND_CLOSEST BIT(1)
1086 #define CLK_MULTIPLIER_BIG_ENDIAN BIT(2)
1088 extern const struct clk_ops clk_multiplier_ops;
1091 * struct clk_composite - aggregate clock of mux, divider and gate clocks
1093 * @hw: handle between common and hardware-specific interfaces
1094 * @mux_hw: handle between composite and hardware-specific mux clock
1095 * @rate_hw: handle between composite and hardware-specific rate clock
1096 * @gate_hw: handle between composite and hardware-specific gate clock
1097 * @mux_ops: clock ops for mux
1098 * @rate_ops: clock ops for rate
1099 * @gate_ops: clock ops for gate
1101 struct clk_composite {
1105 struct clk_hw *mux_hw;
1106 struct clk_hw *rate_hw;
1107 struct clk_hw *gate_hw;
1109 const struct clk_ops *mux_ops;
1110 const struct clk_ops *rate_ops;
1111 const struct clk_ops *gate_ops;
1114 #define to_clk_composite(_hw) container_of(_hw, struct clk_composite, hw)
1116 struct clk *clk_register_composite(struct device *dev, const char *name,
1117 const char * const *parent_names, int num_parents,
1118 struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
1119 struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
1120 struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
1121 unsigned long flags);
1122 struct clk *clk_register_composite_pdata(struct device *dev, const char *name,
1123 const struct clk_parent_data *parent_data, int num_parents,
1124 struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
1125 struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
1126 struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
1127 unsigned long flags);
1128 void clk_unregister_composite(struct clk *clk);
1129 struct clk_hw *clk_hw_register_composite(struct device *dev, const char *name,
1130 const char * const *parent_names, int num_parents,
1131 struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
1132 struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
1133 struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
1134 unsigned long flags);
1135 struct clk_hw *clk_hw_register_composite_pdata(struct device *dev,
1137 const struct clk_parent_data *parent_data, int num_parents,
1138 struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
1139 struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
1140 struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
1141 unsigned long flags);
1142 struct clk_hw *devm_clk_hw_register_composite_pdata(struct device *dev,
1143 const char *name, const struct clk_parent_data *parent_data,
1145 struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
1146 struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
1147 struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
1148 unsigned long flags);
1149 void clk_hw_unregister_composite(struct clk_hw *hw);
1151 struct clk *clk_register(struct device *dev, struct clk_hw *hw);
1152 struct clk *devm_clk_register(struct device *dev, struct clk_hw *hw);
1154 int __must_check clk_hw_register(struct device *dev, struct clk_hw *hw);
1155 int __must_check devm_clk_hw_register(struct device *dev, struct clk_hw *hw);
1156 int __must_check of_clk_hw_register(struct device_node *node, struct clk_hw *hw);
1158 void clk_unregister(struct clk *clk);
1159 void devm_clk_unregister(struct device *dev, struct clk *clk);
1161 void clk_hw_unregister(struct clk_hw *hw);
1162 void devm_clk_hw_unregister(struct device *dev, struct clk_hw *hw);
1164 /* helper functions */
1165 const char *__clk_get_name(const struct clk *clk);
1166 const char *clk_hw_get_name(const struct clk_hw *hw);
1167 #ifdef CONFIG_COMMON_CLK
1168 struct clk_hw *__clk_get_hw(struct clk *clk);
1170 static inline struct clk_hw *__clk_get_hw(struct clk *clk)
1172 return (struct clk_hw *)clk;
1176 struct clk *clk_hw_get_clk(struct clk_hw *hw, const char *con_id);
1177 struct clk *devm_clk_hw_get_clk(struct device *dev, struct clk_hw *hw,
1178 const char *con_id);
1180 unsigned int clk_hw_get_num_parents(const struct clk_hw *hw);
1181 struct clk_hw *clk_hw_get_parent(const struct clk_hw *hw);
1182 struct clk_hw *clk_hw_get_parent_by_index(const struct clk_hw *hw,
1183 unsigned int index);
1184 int clk_hw_get_parent_index(struct clk_hw *hw);
1185 int clk_hw_set_parent(struct clk_hw *hw, struct clk_hw *new_parent);
1186 unsigned int __clk_get_enable_count(struct clk *clk);
1187 unsigned long clk_hw_get_rate(const struct clk_hw *hw);
1188 unsigned long clk_hw_get_flags(const struct clk_hw *hw);
1189 #define clk_hw_can_set_rate_parent(hw) \
1190 (clk_hw_get_flags((hw)) & CLK_SET_RATE_PARENT)
1192 bool clk_hw_is_prepared(const struct clk_hw *hw);
1193 bool clk_hw_rate_is_protected(const struct clk_hw *hw);
1194 bool clk_hw_is_enabled(const struct clk_hw *hw);
1195 bool __clk_is_enabled(struct clk *clk);
1196 struct clk *__clk_lookup(const char *name);
1197 int __clk_mux_determine_rate(struct clk_hw *hw,
1198 struct clk_rate_request *req);
1199 int __clk_determine_rate(struct clk_hw *core, struct clk_rate_request *req);
1200 int __clk_mux_determine_rate_closest(struct clk_hw *hw,
1201 struct clk_rate_request *req);
1202 int clk_mux_determine_rate_flags(struct clk_hw *hw,
1203 struct clk_rate_request *req,
1204 unsigned long flags);
1205 void clk_hw_reparent(struct clk_hw *hw, struct clk_hw *new_parent);
1206 void clk_hw_set_rate_range(struct clk_hw *hw, unsigned long min_rate,
1207 unsigned long max_rate);
1209 static inline void __clk_hw_set_clk(struct clk_hw *dst, struct clk_hw *src)
1211 dst->clk = src->clk;
1212 dst->core = src->core;
1215 static inline long divider_round_rate(struct clk_hw *hw, unsigned long rate,
1216 unsigned long *prate,
1217 const struct clk_div_table *table,
1218 u8 width, unsigned long flags)
1220 return divider_round_rate_parent(hw, clk_hw_get_parent(hw),
1221 rate, prate, table, width, flags);
1224 static inline long divider_ro_round_rate(struct clk_hw *hw, unsigned long rate,
1225 unsigned long *prate,
1226 const struct clk_div_table *table,
1227 u8 width, unsigned long flags,
1230 return divider_ro_round_rate_parent(hw, clk_hw_get_parent(hw),
1231 rate, prate, table, width, flags,
1236 * FIXME clock api without lock protection
1238 unsigned long clk_hw_round_rate(struct clk_hw *hw, unsigned long rate);
1240 struct clk_onecell_data {
1242 unsigned int clk_num;
1245 struct clk_hw_onecell_data {
1247 struct clk_hw *hws[];
1250 #define CLK_OF_DECLARE(name, compat, fn) OF_DECLARE_1(clk, name, compat, fn)
1253 * Use this macro when you have a driver that requires two initialization
1254 * routines, one at of_clk_init(), and one at platform device probe
1256 #define CLK_OF_DECLARE_DRIVER(name, compat, fn) \
1257 static void __init name##_of_clk_init_driver(struct device_node *np) \
1259 of_node_clear_flag(np, OF_POPULATED); \
1262 OF_DECLARE_1(clk, name, compat, name##_of_clk_init_driver)
1264 #define CLK_HW_INIT(_name, _parent, _ops, _flags) \
1265 (&(struct clk_init_data) { \
1268 .parent_names = (const char *[]) { _parent }, \
1273 #define CLK_HW_INIT_HW(_name, _parent, _ops, _flags) \
1274 (&(struct clk_init_data) { \
1277 .parent_hws = (const struct clk_hw*[]) { _parent }, \
1283 * This macro is intended for drivers to be able to share the otherwise
1284 * individual struct clk_hw[] compound literals created by the compiler
1285 * when using CLK_HW_INIT_HW. It does NOT support multiple parents.
1287 #define CLK_HW_INIT_HWS(_name, _parent, _ops, _flags) \
1288 (&(struct clk_init_data) { \
1291 .parent_hws = _parent, \
1296 #define CLK_HW_INIT_FW_NAME(_name, _parent, _ops, _flags) \
1297 (&(struct clk_init_data) { \
1300 .parent_data = (const struct clk_parent_data[]) { \
1301 { .fw_name = _parent }, \
1307 #define CLK_HW_INIT_PARENTS(_name, _parents, _ops, _flags) \
1308 (&(struct clk_init_data) { \
1311 .parent_names = _parents, \
1312 .num_parents = ARRAY_SIZE(_parents), \
1316 #define CLK_HW_INIT_PARENTS_HW(_name, _parents, _ops, _flags) \
1317 (&(struct clk_init_data) { \
1320 .parent_hws = _parents, \
1321 .num_parents = ARRAY_SIZE(_parents), \
1325 #define CLK_HW_INIT_PARENTS_DATA(_name, _parents, _ops, _flags) \
1326 (&(struct clk_init_data) { \
1329 .parent_data = _parents, \
1330 .num_parents = ARRAY_SIZE(_parents), \
1334 #define CLK_HW_INIT_NO_PARENT(_name, _ops, _flags) \
1335 (&(struct clk_init_data) { \
1338 .parent_names = NULL, \
1343 #define CLK_FIXED_FACTOR(_struct, _name, _parent, \
1344 _div, _mult, _flags) \
1345 struct clk_fixed_factor _struct = { \
1348 .hw.init = CLK_HW_INIT(_name, \
1350 &clk_fixed_factor_ops, \
1354 #define CLK_FIXED_FACTOR_HW(_struct, _name, _parent, \
1355 _div, _mult, _flags) \
1356 struct clk_fixed_factor _struct = { \
1359 .hw.init = CLK_HW_INIT_HW(_name, \
1361 &clk_fixed_factor_ops, \
1366 * This macro allows the driver to reuse the _parent array for multiple
1367 * fixed factor clk declarations.
1369 #define CLK_FIXED_FACTOR_HWS(_struct, _name, _parent, \
1370 _div, _mult, _flags) \
1371 struct clk_fixed_factor _struct = { \
1374 .hw.init = CLK_HW_INIT_HWS(_name, \
1376 &clk_fixed_factor_ops, \
1380 #define CLK_FIXED_FACTOR_FW_NAME(_struct, _name, _parent, \
1381 _div, _mult, _flags) \
1382 struct clk_fixed_factor _struct = { \
1385 .hw.init = CLK_HW_INIT_FW_NAME(_name, \
1387 &clk_fixed_factor_ops, \
1392 int of_clk_add_provider(struct device_node *np,
1393 struct clk *(*clk_src_get)(struct of_phandle_args *args,
1396 int of_clk_add_hw_provider(struct device_node *np,
1397 struct clk_hw *(*get)(struct of_phandle_args *clkspec,
1400 int devm_of_clk_add_hw_provider(struct device *dev,
1401 struct clk_hw *(*get)(struct of_phandle_args *clkspec,
1404 void of_clk_del_provider(struct device_node *np);
1405 void devm_of_clk_del_provider(struct device *dev);
1406 struct clk *of_clk_src_simple_get(struct of_phandle_args *clkspec,
1408 struct clk_hw *of_clk_hw_simple_get(struct of_phandle_args *clkspec,
1410 struct clk *of_clk_src_onecell_get(struct of_phandle_args *clkspec, void *data);
1411 struct clk_hw *of_clk_hw_onecell_get(struct of_phandle_args *clkspec,
1413 int of_clk_parent_fill(struct device_node *np, const char **parents,
1415 int of_clk_detect_critical(struct device_node *np, int index,
1416 unsigned long *flags);
1418 #else /* !CONFIG_OF */
1420 static inline int of_clk_add_provider(struct device_node *np,
1421 struct clk *(*clk_src_get)(struct of_phandle_args *args,
1427 static inline int of_clk_add_hw_provider(struct device_node *np,
1428 struct clk_hw *(*get)(struct of_phandle_args *clkspec,
1434 static inline int devm_of_clk_add_hw_provider(struct device *dev,
1435 struct clk_hw *(*get)(struct of_phandle_args *clkspec,
1441 static inline void of_clk_del_provider(struct device_node *np) {}
1442 static inline void devm_of_clk_del_provider(struct device *dev) {}
1443 static inline struct clk *of_clk_src_simple_get(
1444 struct of_phandle_args *clkspec, void *data)
1446 return ERR_PTR(-ENOENT);
1448 static inline struct clk_hw *
1449 of_clk_hw_simple_get(struct of_phandle_args *clkspec, void *data)
1451 return ERR_PTR(-ENOENT);
1453 static inline struct clk *of_clk_src_onecell_get(
1454 struct of_phandle_args *clkspec, void *data)
1456 return ERR_PTR(-ENOENT);
1458 static inline struct clk_hw *
1459 of_clk_hw_onecell_get(struct of_phandle_args *clkspec, void *data)
1461 return ERR_PTR(-ENOENT);
1463 static inline int of_clk_parent_fill(struct device_node *np,
1464 const char **parents, unsigned int size)
1468 static inline int of_clk_detect_critical(struct device_node *np, int index,
1469 unsigned long *flags)
1473 #endif /* CONFIG_OF */
1475 void clk_gate_restore_context(struct clk_hw *hw);
1477 #endif /* CLK_PROVIDER_H */