2 * OMAP powerdomain control
4 * Copyright (C) 2007-2008 Texas Instruments, Inc.
5 * Copyright (C) 2007-2009 Nokia Corporation
7 * Written by Paul Walmsley
8 * Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com>
9 * State counting code by Tero Kristo <tero.kristo@nokia.com>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
17 #include <linux/kernel.h>
18 #include <linux/types.h>
19 #include <linux/list.h>
20 #include <linux/errno.h>
21 #include <linux/string.h>
24 #include <plat/powerdomain.h>
25 #include <plat/clockdomain.h>
26 #include <plat/prcm.h>
36 /* pwrdm_list contains all registered struct powerdomains */
37 static LIST_HEAD(pwrdm_list);
39 static struct pwrdm_ops *arch_pwrdm;
41 /* Private functions */
43 static struct powerdomain *_pwrdm_lookup(const char *name)
45 struct powerdomain *pwrdm, *temp_pwrdm;
49 list_for_each_entry(temp_pwrdm, &pwrdm_list, node) {
50 if (!strcmp(name, temp_pwrdm->name)) {
60 * _pwrdm_register - register a powerdomain
61 * @pwrdm: struct powerdomain * to register
63 * Adds a powerdomain to the internal powerdomain list. Returns
64 * -EINVAL if given a null pointer, -EEXIST if a powerdomain is
65 * already registered by the provided name, or 0 upon success.
67 static int _pwrdm_register(struct powerdomain *pwrdm)
74 if (!omap_chip_is(pwrdm->omap_chip))
77 if (_pwrdm_lookup(pwrdm->name))
80 list_add(&pwrdm->node, &pwrdm_list);
82 /* Initialize the powerdomain's state counter */
83 for (i = 0; i < PWRDM_MAX_PWRSTS; i++)
84 pwrdm->state_counter[i] = 0;
86 pwrdm->ret_logic_off_counter = 0;
87 for (i = 0; i < pwrdm->banks; i++)
88 pwrdm->ret_mem_off_counter[i] = 0;
90 pwrdm_wait_transition(pwrdm);
91 pwrdm->state = pwrdm_read_pwrst(pwrdm);
92 pwrdm->state_counter[pwrdm->state] = 1;
94 pr_debug("powerdomain: registered %s\n", pwrdm->name);
99 static void _update_logic_membank_counters(struct powerdomain *pwrdm)
102 u8 prev_logic_pwrst, prev_mem_pwrst;
104 prev_logic_pwrst = pwrdm_read_prev_logic_pwrst(pwrdm);
105 if ((pwrdm->pwrsts_logic_ret == PWRSTS_OFF_RET) &&
106 (prev_logic_pwrst == PWRDM_POWER_OFF))
107 pwrdm->ret_logic_off_counter++;
109 for (i = 0; i < pwrdm->banks; i++) {
110 prev_mem_pwrst = pwrdm_read_prev_mem_pwrst(pwrdm, i);
112 if ((pwrdm->pwrsts_mem_ret[i] == PWRSTS_OFF_RET) &&
113 (prev_mem_pwrst == PWRDM_POWER_OFF))
114 pwrdm->ret_mem_off_counter[i]++;
118 static int _pwrdm_state_switch(struct powerdomain *pwrdm, int flag)
127 state = pwrdm_read_pwrst(pwrdm);
130 case PWRDM_STATE_NOW:
133 case PWRDM_STATE_PREV:
134 prev = pwrdm_read_prev_pwrst(pwrdm);
135 if (pwrdm->state != prev)
136 pwrdm->state_counter[prev]++;
137 if (prev == PWRDM_POWER_RET)
138 _update_logic_membank_counters(pwrdm);
145 pwrdm->state_counter[state]++;
147 pm_dbg_update_time(pwrdm, prev);
149 pwrdm->state = state;
154 static int _pwrdm_pre_transition_cb(struct powerdomain *pwrdm, void *unused)
156 pwrdm_clear_all_prev_pwrst(pwrdm);
157 _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW);
161 static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused)
163 _pwrdm_state_switch(pwrdm, PWRDM_STATE_PREV);
167 /* Public functions */
170 * pwrdm_init - set up the powerdomain layer
171 * @pwrdm_list: array of struct powerdomain pointers to register
172 * @custom_funcs: func pointers for arch specfic implementations
174 * Loop through the array of powerdomains @pwrdm_list, registering all
175 * that are available on the current CPU. If pwrdm_list is supplied
176 * and not null, all of the referenced powerdomains will be
177 * registered. No return value. XXX pwrdm_list is not really a
178 * "list"; it is an array. Rename appropriately.
180 void pwrdm_init(struct powerdomain **pwrdm_list, struct pwrdm_ops *custom_funcs)
182 struct powerdomain **p = NULL;
185 WARN(1, "powerdomain: No custom pwrdm functions registered\n");
187 arch_pwrdm = custom_funcs;
190 for (p = pwrdm_list; *p; p++)
196 * pwrdm_lookup - look up a powerdomain by name, return a pointer
197 * @name: name of powerdomain
199 * Find a registered powerdomain by its name @name. Returns a pointer
200 * to the struct powerdomain if found, or NULL otherwise.
202 struct powerdomain *pwrdm_lookup(const char *name)
204 struct powerdomain *pwrdm;
209 pwrdm = _pwrdm_lookup(name);
215 * pwrdm_for_each - call function on each registered clockdomain
216 * @fn: callback function *
218 * Call the supplied function @fn for each registered powerdomain.
219 * The callback function @fn can return anything but 0 to bail out
220 * early from the iterator. Returns the last return value of the
221 * callback function, which should be 0 for success or anything else
222 * to indicate failure; or -EINVAL if the function pointer is null.
224 int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm, void *user),
227 struct powerdomain *temp_pwrdm;
233 list_for_each_entry(temp_pwrdm, &pwrdm_list, node) {
234 ret = (*fn)(temp_pwrdm, user);
243 * pwrdm_add_clkdm - add a clockdomain to a powerdomain
244 * @pwrdm: struct powerdomain * to add the clockdomain to
245 * @clkdm: struct clockdomain * to associate with a powerdomain
247 * Associate the clockdomain @clkdm with a powerdomain @pwrdm. This
248 * enables the use of pwrdm_for_each_clkdm(). Returns -EINVAL if
249 * presented with invalid pointers; -ENOMEM if memory could not be allocated;
252 int pwrdm_add_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm)
257 if (!pwrdm || !clkdm)
260 pr_debug("powerdomain: associating clockdomain %s with powerdomain "
261 "%s\n", clkdm->name, pwrdm->name);
263 for (i = 0; i < PWRDM_MAX_CLKDMS; i++) {
264 if (!pwrdm->pwrdm_clkdms[i])
267 if (pwrdm->pwrdm_clkdms[i] == clkdm) {
274 if (i == PWRDM_MAX_CLKDMS) {
275 pr_debug("powerdomain: increase PWRDM_MAX_CLKDMS for "
276 "pwrdm %s clkdm %s\n", pwrdm->name, clkdm->name);
282 pwrdm->pwrdm_clkdms[i] = clkdm;
291 * pwrdm_del_clkdm - remove a clockdomain from a powerdomain
292 * @pwrdm: struct powerdomain * to add the clockdomain to
293 * @clkdm: struct clockdomain * to associate with a powerdomain
295 * Dissociate the clockdomain @clkdm from the powerdomain
296 * @pwrdm. Returns -EINVAL if presented with invalid pointers; -ENOENT
297 * if @clkdm was not associated with the powerdomain, or 0 upon
300 int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm)
305 if (!pwrdm || !clkdm)
308 pr_debug("powerdomain: dissociating clockdomain %s from powerdomain "
309 "%s\n", clkdm->name, pwrdm->name);
311 for (i = 0; i < PWRDM_MAX_CLKDMS; i++)
312 if (pwrdm->pwrdm_clkdms[i] == clkdm)
315 if (i == PWRDM_MAX_CLKDMS) {
316 pr_debug("powerdomain: clkdm %s not associated with pwrdm "
317 "%s ?!\n", clkdm->name, pwrdm->name);
322 pwrdm->pwrdm_clkdms[i] = NULL;
331 * pwrdm_for_each_clkdm - call function on each clkdm in a pwrdm
332 * @pwrdm: struct powerdomain * to iterate over
333 * @fn: callback function *
335 * Call the supplied function @fn for each clockdomain in the powerdomain
336 * @pwrdm. The callback function can return anything but 0 to bail
337 * out early from the iterator. Returns -EINVAL if presented with
338 * invalid pointers; or passes along the last return value of the
339 * callback function, which should be 0 for success or anything else
340 * to indicate failure.
342 int pwrdm_for_each_clkdm(struct powerdomain *pwrdm,
343 int (*fn)(struct powerdomain *pwrdm,
344 struct clockdomain *clkdm))
352 for (i = 0; i < PWRDM_MAX_CLKDMS && !ret; i++)
353 ret = (*fn)(pwrdm, pwrdm->pwrdm_clkdms[i]);
359 * pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain
360 * @pwrdm: struct powerdomain *
362 * Return the number of controllable memory banks in powerdomain @pwrdm,
363 * starting with 1. Returns -EINVAL if the powerdomain pointer is null.
365 int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm)
374 * pwrdm_set_next_pwrst - set next powerdomain power state
375 * @pwrdm: struct powerdomain * to set
376 * @pwrst: one of the PWRDM_POWER_* macros
378 * Set the powerdomain @pwrdm's next power state to @pwrst. The powerdomain
379 * may not enter this state immediately if the preconditions for this state
380 * have not been satisfied. Returns -EINVAL if the powerdomain pointer is
381 * null or if the power state is invalid for the powerdomin, or returns 0
384 int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst)
391 if (!(pwrdm->pwrsts & (1 << pwrst)))
394 pr_debug("powerdomain: setting next powerstate for %s to %0x\n",
397 if (arch_pwrdm && arch_pwrdm->pwrdm_set_next_pwrst)
398 ret = arch_pwrdm->pwrdm_set_next_pwrst(pwrdm, pwrst);
404 * pwrdm_read_next_pwrst - get next powerdomain power state
405 * @pwrdm: struct powerdomain * to get power state
407 * Return the powerdomain @pwrdm's next power state. Returns -EINVAL
408 * if the powerdomain pointer is null or returns the next power state
411 int pwrdm_read_next_pwrst(struct powerdomain *pwrdm)
418 if (arch_pwrdm && arch_pwrdm->pwrdm_read_next_pwrst)
419 ret = arch_pwrdm->pwrdm_read_next_pwrst(pwrdm);
425 * pwrdm_read_pwrst - get current powerdomain power state
426 * @pwrdm: struct powerdomain * to get power state
428 * Return the powerdomain @pwrdm's current power state. Returns -EINVAL
429 * if the powerdomain pointer is null or returns the current power state
432 int pwrdm_read_pwrst(struct powerdomain *pwrdm)
439 if (arch_pwrdm && arch_pwrdm->pwrdm_read_pwrst)
440 ret = arch_pwrdm->pwrdm_read_pwrst(pwrdm);
446 * pwrdm_read_prev_pwrst - get previous powerdomain power state
447 * @pwrdm: struct powerdomain * to get previous power state
449 * Return the powerdomain @pwrdm's previous power state. Returns -EINVAL
450 * if the powerdomain pointer is null or returns the previous power state
453 int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm)
460 if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_pwrst)
461 ret = arch_pwrdm->pwrdm_read_prev_pwrst(pwrdm);
467 * pwrdm_set_logic_retst - set powerdomain logic power state upon retention
468 * @pwrdm: struct powerdomain * to set
469 * @pwrst: one of the PWRDM_POWER_* macros
471 * Set the next power state @pwrst that the logic portion of the
472 * powerdomain @pwrdm will enter when the powerdomain enters retention.
473 * This will be either RETENTION or OFF, if supported. Returns
474 * -EINVAL if the powerdomain pointer is null or the target power
475 * state is not not supported, or returns 0 upon success.
477 int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst)
484 if (!(pwrdm->pwrsts_logic_ret & (1 << pwrst)))
487 pr_debug("powerdomain: setting next logic powerstate for %s to %0x\n",
490 if (arch_pwrdm && arch_pwrdm->pwrdm_set_logic_retst)
491 ret = arch_pwrdm->pwrdm_set_logic_retst(pwrdm, pwrst);
497 * pwrdm_set_mem_onst - set memory power state while powerdomain ON
498 * @pwrdm: struct powerdomain * to set
499 * @bank: memory bank number to set (0-3)
500 * @pwrst: one of the PWRDM_POWER_* macros
502 * Set the next power state @pwrst that memory bank @bank of the
503 * powerdomain @pwrdm will enter when the powerdomain enters the ON
504 * state. @bank will be a number from 0 to 3, and represents different
505 * types of memory, depending on the powerdomain. Returns -EINVAL if
506 * the powerdomain pointer is null or the target power state is not
507 * not supported for this memory bank, -EEXIST if the target memory
508 * bank does not exist or is not controllable, or returns 0 upon
511 int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
518 if (pwrdm->banks < (bank + 1))
521 if (!(pwrdm->pwrsts_mem_on[bank] & (1 << pwrst)))
524 pr_debug("powerdomain: setting next memory powerstate for domain %s "
525 "bank %0x while pwrdm-ON to %0x\n", pwrdm->name, bank, pwrst);
527 if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_onst)
528 ret = arch_pwrdm->pwrdm_set_mem_onst(pwrdm, bank, pwrst);
534 * pwrdm_set_mem_retst - set memory power state while powerdomain in RET
535 * @pwrdm: struct powerdomain * to set
536 * @bank: memory bank number to set (0-3)
537 * @pwrst: one of the PWRDM_POWER_* macros
539 * Set the next power state @pwrst that memory bank @bank of the
540 * powerdomain @pwrdm will enter when the powerdomain enters the
541 * RETENTION state. Bank will be a number from 0 to 3, and represents
542 * different types of memory, depending on the powerdomain. @pwrst
543 * will be either RETENTION or OFF, if supported. Returns -EINVAL if
544 * the powerdomain pointer is null or the target power state is not
545 * not supported for this memory bank, -EEXIST if the target memory
546 * bank does not exist or is not controllable, or returns 0 upon
549 int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst)
556 if (pwrdm->banks < (bank + 1))
559 if (!(pwrdm->pwrsts_mem_ret[bank] & (1 << pwrst)))
562 pr_debug("powerdomain: setting next memory powerstate for domain %s "
563 "bank %0x while pwrdm-RET to %0x\n", pwrdm->name, bank, pwrst);
565 if (arch_pwrdm && arch_pwrdm->pwrdm_set_mem_retst)
566 ret = arch_pwrdm->pwrdm_set_mem_retst(pwrdm, bank, pwrst);
572 * pwrdm_read_logic_pwrst - get current powerdomain logic retention power state
573 * @pwrdm: struct powerdomain * to get current logic retention power state
575 * Return the power state that the logic portion of powerdomain @pwrdm
576 * will enter when the powerdomain enters retention. Returns -EINVAL
577 * if the powerdomain pointer is null or returns the logic retention
578 * power state upon success.
580 int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm)
587 if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_pwrst)
588 ret = arch_pwrdm->pwrdm_read_logic_pwrst(pwrdm);
594 * pwrdm_read_prev_logic_pwrst - get previous powerdomain logic power state
595 * @pwrdm: struct powerdomain * to get previous logic power state
597 * Return the powerdomain @pwrdm's previous logic power state. Returns
598 * -EINVAL if the powerdomain pointer is null or returns the previous
599 * logic power state upon success.
601 int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm)
608 if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_logic_pwrst)
609 ret = arch_pwrdm->pwrdm_read_prev_logic_pwrst(pwrdm);
615 * pwrdm_read_logic_retst - get next powerdomain logic power state
616 * @pwrdm: struct powerdomain * to get next logic power state
618 * Return the powerdomain pwrdm's logic power state. Returns -EINVAL
619 * if the powerdomain pointer is null or returns the next logic
620 * power state upon success.
622 int pwrdm_read_logic_retst(struct powerdomain *pwrdm)
629 if (arch_pwrdm && arch_pwrdm->pwrdm_read_logic_retst)
630 ret = arch_pwrdm->pwrdm_read_logic_retst(pwrdm);
636 * pwrdm_read_mem_pwrst - get current memory bank power state
637 * @pwrdm: struct powerdomain * to get current memory bank power state
638 * @bank: memory bank number (0-3)
640 * Return the powerdomain @pwrdm's current memory power state for bank
641 * @bank. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
642 * the target memory bank does not exist or is not controllable, or
643 * returns the current memory power state upon success.
645 int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
652 if (pwrdm->banks < (bank + 1))
655 if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK)
658 if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_pwrst)
659 ret = arch_pwrdm->pwrdm_read_mem_pwrst(pwrdm, bank);
665 * pwrdm_read_prev_mem_pwrst - get previous memory bank power state
666 * @pwrdm: struct powerdomain * to get previous memory bank power state
667 * @bank: memory bank number (0-3)
669 * Return the powerdomain @pwrdm's previous memory power state for
670 * bank @bank. Returns -EINVAL if the powerdomain pointer is null,
671 * -EEXIST if the target memory bank does not exist or is not
672 * controllable, or returns the previous memory power state upon
675 int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank)
682 if (pwrdm->banks < (bank + 1))
685 if (pwrdm->flags & PWRDM_HAS_MPU_QUIRK)
688 if (arch_pwrdm && arch_pwrdm->pwrdm_read_prev_mem_pwrst)
689 ret = arch_pwrdm->pwrdm_read_prev_mem_pwrst(pwrdm, bank);
695 * pwrdm_read_mem_retst - get next memory bank power state
696 * @pwrdm: struct powerdomain * to get mext memory bank power state
697 * @bank: memory bank number (0-3)
699 * Return the powerdomain pwrdm's next memory power state for bank
700 * x. Returns -EINVAL if the powerdomain pointer is null, -EEXIST if
701 * the target memory bank does not exist or is not controllable, or
702 * returns the next memory power state upon success.
704 int pwrdm_read_mem_retst(struct powerdomain *pwrdm, u8 bank)
711 if (pwrdm->banks < (bank + 1))
714 if (arch_pwrdm && arch_pwrdm->pwrdm_read_mem_retst)
715 ret = arch_pwrdm->pwrdm_read_mem_retst(pwrdm, bank);
721 * pwrdm_clear_all_prev_pwrst - clear previous powerstate register for a pwrdm
722 * @pwrdm: struct powerdomain * to clear
724 * Clear the powerdomain's previous power state register @pwrdm.
725 * Clears the entire register, including logic and memory bank
726 * previous power states. Returns -EINVAL if the powerdomain pointer
727 * is null, or returns 0 upon success.
729 int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm)
737 * XXX should get the powerdomain's current state here;
738 * warn & fail if it is not ON.
741 pr_debug("powerdomain: clearing previous power state reg for %s\n",
744 if (arch_pwrdm && arch_pwrdm->pwrdm_clear_all_prev_pwrst)
745 ret = arch_pwrdm->pwrdm_clear_all_prev_pwrst(pwrdm);
751 * pwrdm_enable_hdwr_sar - enable automatic hardware SAR for a pwrdm
752 * @pwrdm: struct powerdomain *
754 * Enable automatic context save-and-restore upon power state change
755 * for some devices in the powerdomain @pwrdm. Warning: this only
756 * affects a subset of devices in a powerdomain; check the TRM
757 * closely. Returns -EINVAL if the powerdomain pointer is null or if
758 * the powerdomain does not support automatic save-and-restore, or
759 * returns 0 upon success.
761 int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm)
768 if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))
771 pr_debug("powerdomain: %s: setting SAVEANDRESTORE bit\n",
774 if (arch_pwrdm && arch_pwrdm->pwrdm_enable_hdwr_sar)
775 ret = arch_pwrdm->pwrdm_enable_hdwr_sar(pwrdm);
781 * pwrdm_disable_hdwr_sar - disable automatic hardware SAR for a pwrdm
782 * @pwrdm: struct powerdomain *
784 * Disable automatic context save-and-restore upon power state change
785 * for some devices in the powerdomain @pwrdm. Warning: this only
786 * affects a subset of devices in a powerdomain; check the TRM
787 * closely. Returns -EINVAL if the powerdomain pointer is null or if
788 * the powerdomain does not support automatic save-and-restore, or
789 * returns 0 upon success.
791 int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm)
798 if (!(pwrdm->flags & PWRDM_HAS_HDWR_SAR))
801 pr_debug("powerdomain: %s: clearing SAVEANDRESTORE bit\n",
804 if (arch_pwrdm && arch_pwrdm->pwrdm_disable_hdwr_sar)
805 ret = arch_pwrdm->pwrdm_disable_hdwr_sar(pwrdm);
811 * pwrdm_has_hdwr_sar - test whether powerdomain supports hardware SAR
812 * @pwrdm: struct powerdomain *
814 * Returns 1 if powerdomain @pwrdm supports hardware save-and-restore
815 * for some devices, or 0 if it does not.
817 bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm)
819 return (pwrdm && pwrdm->flags & PWRDM_HAS_HDWR_SAR) ? 1 : 0;
823 * pwrdm_set_lowpwrstchange - Request a low power state change
824 * @pwrdm: struct powerdomain *
826 * Allows a powerdomain to transtion to a lower power sleep state
827 * from an existing sleep state without waking up the powerdomain.
828 * Returns -EINVAL if the powerdomain pointer is null or if the
829 * powerdomain does not support LOWPOWERSTATECHANGE, or returns 0
832 int pwrdm_set_lowpwrstchange(struct powerdomain *pwrdm)
839 if (!(pwrdm->flags & PWRDM_HAS_LOWPOWERSTATECHANGE))
842 pr_debug("powerdomain: %s: setting LOWPOWERSTATECHANGE bit\n",
845 if (arch_pwrdm && arch_pwrdm->pwrdm_set_lowpwrstchange)
846 ret = arch_pwrdm->pwrdm_set_lowpwrstchange(pwrdm);
852 * pwrdm_wait_transition - wait for powerdomain power transition to finish
853 * @pwrdm: struct powerdomain * to wait for
855 * If the powerdomain @pwrdm is in the process of a state transition,
856 * spin until it completes the power transition, or until an iteration
857 * bailout value is reached. Returns -EINVAL if the powerdomain
858 * pointer is null, -EAGAIN if the bailout value was reached, or
859 * returns 0 upon success.
861 int pwrdm_wait_transition(struct powerdomain *pwrdm)
868 if (arch_pwrdm && arch_pwrdm->pwrdm_wait_transition)
869 ret = arch_pwrdm->pwrdm_wait_transition(pwrdm);
874 int pwrdm_state_switch(struct powerdomain *pwrdm)
876 return _pwrdm_state_switch(pwrdm, PWRDM_STATE_NOW);
879 int pwrdm_clkdm_state_switch(struct clockdomain *clkdm)
881 if (clkdm != NULL && clkdm->pwrdm.ptr != NULL) {
882 pwrdm_wait_transition(clkdm->pwrdm.ptr);
883 return pwrdm_state_switch(clkdm->pwrdm.ptr);
889 int pwrdm_pre_transition(void)
891 pwrdm_for_each(_pwrdm_pre_transition_cb, NULL);
895 int pwrdm_post_transition(void)
897 pwrdm_for_each(_pwrdm_post_transition_cb, NULL);