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author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-06-03 17:13:20 -0400 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-06-03 17:13:20 -0400 |
commit | 057beb1de54d33ecfd3397ed219b1f4518e3b470 (patch) | |
tree | 7c67e9d8c88093a3d551111e56401826a964ffba /drivers/base | |
parent | 42a09284fab8abc15c8554f2e2aa2368161c77c6 (diff) | |
parent | 5ece2399181a5abaf42a4cb607463770686778e6 (diff) |
Merge branch 'pm-cpufreq'
* pm-cpufreq: (28 commits)
cpufreq: handle calls to ->target_index() in separate routine
cpufreq: s5pv210: drop check for CONFIG_PM_VERBOSE
cpufreq: intel_pstate: Remove unused member name of cpudata
cpufreq: Break out early when frequency equals target_freq
cpufreq: Tegra: drop wrapper around tegra_update_cpu_speed()
cpufreq: imx6q: Remove unused include
cpufreq: imx6q: Drop devm_clk/regulator_get usage
cpufreq: powernow-k8: Suppress checkpatch warnings
cpufreq: powernv: make local function static
cpufreq: Enable big.LITTLE cpufreq driver on arm64
cpufreq: nforce2: remove DEFINE_PCI_DEVICE_TABLE macro
intel_pstate: Add CPU IDs for Broadwell processors
cpufreq: Fix build error on some platforms that use cpufreq_for_each_*
PM / OPP: Move cpufreq specific OPP functions out of generic OPP library
PM / OPP: Remove cpufreq wrapper dependency on internal data organization
cpufreq: Catch double invocations of cpufreq_freq_transition_begin/end
intel_pstate: Remove sample parameter in intel_pstate_calc_busy
cpufreq: Kconfig: Fix spelling errors
cpufreq: Make linux-pm@vger.kernel.org official mailing list
cpufreq: exynos: Use dev_err/info function instead of pr_err/info
...
Diffstat (limited to 'drivers/base')
-rw-r--r-- | drivers/base/power/opp.c | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/drivers/base/power/opp.c b/drivers/base/power/opp.c index 39412c15db70..89ced955fafa 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> |
@@ -619,96 +618,6 @@ int dev_pm_opp_disable(struct device *dev, unsigned long freq) | |||
619 | } | 618 | } |
620 | EXPORT_SYMBOL_GPL(dev_pm_opp_disable); | 619 | EXPORT_SYMBOL_GPL(dev_pm_opp_disable); |
621 | 620 | ||
622 | #ifdef CONFIG_CPU_FREQ | ||
623 | /** | ||
624 | * dev_pm_opp_init_cpufreq_table() - create a cpufreq table for a device | ||
625 | * @dev: device for which we do this operation | ||
626 | * @table: Cpufreq table returned back to caller | ||
627 | * | ||
628 | * Generate a cpufreq table for a provided device- this assumes that the | ||
629 | * opp list is already initialized and ready for usage. | ||
630 | * | ||
631 | * This function allocates required memory for the cpufreq table. It is | ||
632 | * expected that the caller does the required maintenance such as freeing | ||
633 | * the table as required. | ||
634 | * | ||
635 | * Returns -EINVAL for bad pointers, -ENODEV if the device is not found, -ENOMEM | ||
636 | * if no memory available for the operation (table is not populated), returns 0 | ||
637 | * if successful and table is populated. | ||
638 | * | ||
639 | * WARNING: It is important for the callers to ensure refreshing their copy of | ||
640 | * the table if any of the mentioned functions have been invoked in the interim. | ||
641 | * | ||
642 | * Locking: The internal device_opp and opp structures are RCU protected. | ||
643 | * To simplify the logic, we pretend we are updater and hold relevant mutex here | ||
644 | * Callers should ensure that this function is *NOT* called under RCU protection | ||
645 | * or in contexts where mutex locking cannot be used. | ||
646 | */ | ||
647 | int dev_pm_opp_init_cpufreq_table(struct device *dev, | ||
648 | struct cpufreq_frequency_table **table) | ||
649 | { | ||
650 | struct device_opp *dev_opp; | ||
651 | struct dev_pm_opp *opp; | ||
652 | struct cpufreq_frequency_table *freq_table; | ||
653 | int i = 0; | ||
654 | |||
655 | /* Pretend as if I am an updater */ | ||
656 | mutex_lock(&dev_opp_list_lock); | ||
657 | |||
658 | dev_opp = find_device_opp(dev); | ||
659 | if (IS_ERR(dev_opp)) { | ||
660 | int r = PTR_ERR(dev_opp); | ||
661 | mutex_unlock(&dev_opp_list_lock); | ||
662 | dev_err(dev, "%s: Device OPP not found (%d)\n", __func__, r); | ||
663 | return r; | ||
664 | } | ||
665 | |||
666 | freq_table = kzalloc(sizeof(struct cpufreq_frequency_table) * | ||
667 | (dev_pm_opp_get_opp_count(dev) + 1), GFP_KERNEL); | ||
668 | if (!freq_table) { | ||
669 | mutex_unlock(&dev_opp_list_lock); | ||
670 | dev_warn(dev, "%s: Unable to allocate frequency table\n", | ||
671 | __func__); | ||
672 | return -ENOMEM; | ||
673 | } | ||
674 | |||
675 | list_for_each_entry(opp, &dev_opp->opp_list, node) { | ||
676 | if (opp->available) { | ||
677 | freq_table[i].driver_data = i; | ||
678 | freq_table[i].frequency = opp->rate / 1000; | ||
679 | i++; | ||
680 | } | ||
681 | } | ||
682 | mutex_unlock(&dev_opp_list_lock); | ||
683 | |||
684 | freq_table[i].driver_data = i; | ||
685 | freq_table[i].frequency = CPUFREQ_TABLE_END; | ||
686 | |||
687 | *table = &freq_table[0]; | ||
688 | |||
689 | return 0; | ||
690 | } | ||
691 | EXPORT_SYMBOL_GPL(dev_pm_opp_init_cpufreq_table); | ||
692 | |||
693 | /** | ||
694 | * dev_pm_opp_free_cpufreq_table() - free the cpufreq table | ||
695 | * @dev: device for which we do this operation | ||
696 | * @table: table to free | ||
697 | * | ||
698 | * Free up the table allocated by dev_pm_opp_init_cpufreq_table | ||
699 | */ | ||
700 | void dev_pm_opp_free_cpufreq_table(struct device *dev, | ||
701 | struct cpufreq_frequency_table **table) | ||
702 | { | ||
703 | if (!table) | ||
704 | return; | ||
705 | |||
706 | kfree(*table); | ||
707 | *table = NULL; | ||
708 | } | ||
709 | EXPORT_SYMBOL_GPL(dev_pm_opp_free_cpufreq_table); | ||
710 | #endif /* CONFIG_CPU_FREQ */ | ||
711 | |||
712 | /** | 621 | /** |
713 | * dev_pm_opp_get_notifier() - find notifier_head of the device with opp | 622 | * dev_pm_opp_get_notifier() - find notifier_head of the device with opp |
714 | * @dev: device pointer used to lookup device OPPs. | 623 | * @dev: device pointer used to lookup device OPPs. |