diff options
Diffstat (limited to 'drivers/base/power')
-rw-r--r-- | drivers/base/power/opp.c | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c index 38b43bb20878..d9e376a6d19d 100644 --- a/drivers/base/power/opp.c +++ b/drivers/base/power/opp.c | |||
@@ -15,7 +15,6 @@ | |||
15 | #include <linux/errno.h> | 15 | #include <linux/errno.h> |
16 | #include <linux/err.h> | 16 | #include <linux/err.h> |
17 | #include <linux/slab.h> | 17 | #include <linux/slab.h> |
18 | #include <linux/cpufreq.h> | ||
19 | #include <linux/device.h> | 18 | #include <linux/device.h> |
20 | #include <linux/list.h> | 19 | #include <linux/list.h> |
21 | #include <linux/rculist.h> | 20 | #include <linux/rculist.h> |
@@ -596,97 +595,6 @@ int dev_pm_opp_disable(struct device *dev, unsigned long freq) | |||
596 | } | 595 | } |
597 | EXPORT_SYMBOL_GPL(dev_pm_opp_disable); | 596 | EXPORT_SYMBOL_GPL(dev_pm_opp_disable); |
598 | 597 | ||
599 | #ifdef CONFIG_CPU_FREQ | ||
600 | /** | ||
601 | * dev_pm_opp_init_cpufreq_table() - create a cpufreq table for a device | ||
602 | * @dev: device for which we do this operation | ||
603 | * @table: Cpufreq table returned back to caller | ||
604 | * | ||
605 | * Generate a cpufreq table for a provided device- this assumes that the | ||
606 | * opp list is already initialized and ready for usage. | ||
607 | * | ||
608 | * This function allocates required memory for the cpufreq table. It is | ||
609 | * expected that the caller does the required maintenance such as freeing | ||
610 | * the table as required. | ||
611 | * | ||
612 | * Returns -EINVAL for bad pointers, -ENODEV if the device is not found, -ENOMEM | ||
613 | * if no memory available for the operation (table is not populated), returns 0 | ||
614 | * if successful and table is populated. | ||
615 | * | ||
616 | * WARNING: It is important for the callers to ensure refreshing their copy of | ||
617 | * the table if any of the mentioned functions have been invoked in the interim. | ||
618 | * | ||
619 | * Locking: The internal device_opp and opp structures are RCU protected. | ||
620 | * Since we just use the regular accessor functions to access the internal data | ||
621 | * structures, we use RCU read lock inside this function. As a result, users of | ||
622 | * this function DONOT need to use explicit locks for invoking. | ||
623 | */ | ||
624 | int dev_pm_opp_init_cpufreq_table(struct device *dev, | ||
625 | struct cpufreq_frequency_table **table) | ||
626 | { | ||
627 | struct dev_pm_opp *opp; | ||
628 | struct cpufreq_frequency_table *freq_table = NULL; | ||
629 | int i, max_opps, ret = 0; | ||
630 | unsigned long rate; | ||
631 | |||
632 | rcu_read_lock(); | ||
633 | |||
634 | max_opps = dev_pm_opp_get_opp_count(dev); | ||
635 | if (max_opps <= 0) { | ||
636 | ret = max_opps ? max_opps : -ENODATA; | ||
637 | goto out; | ||
638 | } | ||
639 | |||
640 | freq_table = kzalloc(sizeof(*freq_table) * (max_opps + 1), GFP_KERNEL); | ||
641 | if (!freq_table) { | ||
642 | ret = -ENOMEM; | ||
643 | goto out; | ||
644 | } | ||
645 | |||
646 | for (i = 0, rate = 0; i < max_opps; i++, rate++) { | ||
647 | /* find next rate */ | ||
648 | opp = dev_pm_opp_find_freq_ceil(dev, &rate); | ||
649 | if (IS_ERR(opp)) { | ||
650 | ret = PTR_ERR(opp); | ||
651 | goto out; | ||
652 | } | ||
653 | freq_table[i].driver_data = i; | ||
654 | freq_table[i].frequency = rate / 1000; | ||
655 | } | ||
656 | |||
657 | freq_table[i].driver_data = i; | ||
658 | freq_table[i].frequency = CPUFREQ_TABLE_END; | ||
659 | |||
660 | *table = &freq_table[0]; | ||
661 | |||
662 | out: | ||
663 | rcu_read_unlock(); | ||
664 | if (ret) | ||
665 | kfree(freq_table); | ||
666 | |||
667 | return ret; | ||
668 | } | ||
669 | EXPORT_SYMBOL_GPL(dev_pm_opp_init_cpufreq_table); | ||
670 | |||
671 | /** | ||
672 | * dev_pm_opp_free_cpufreq_table() - free the cpufreq table | ||
673 | * @dev: device for which we do this operation | ||
674 | * @table: table to free | ||
675 | * | ||
676 | * Free up the table allocated by dev_pm_opp_init_cpufreq_table | ||
677 | */ | ||
678 | void dev_pm_opp_free_cpufreq_table(struct device *dev, | ||
679 | struct cpufreq_frequency_table **table) | ||
680 | { | ||
681 | if (!table) | ||
682 | return; | ||
683 | |||
684 | kfree(*table); | ||
685 | *table = NULL; | ||
686 | } | ||
687 | EXPORT_SYMBOL_GPL(dev_pm_opp_free_cpufreq_table); | ||
688 | #endif /* CONFIG_CPU_FREQ */ | ||
689 | |||
690 | /** | 598 | /** |
691 | * dev_pm_opp_get_notifier() - find notifier_head of the device with opp | 599 | * dev_pm_opp_get_notifier() - find notifier_head of the device with opp |
692 | * @dev: device pointer used to lookup device OPPs. | 600 | * @dev: device pointer used to lookup device OPPs. |