cpufreq: Fix minor formatting issues
There were a few noticeable formatting issues in core cpufreq code. This cleans them up to make code look better. The changes include: - Whitespace cleanup. - Rearrangements of code. - Multiline comments fixes. - Formatting changes to fit 80 columns. Copyright information in cpufreq.c is also updated to include my name for 2013. [rjw: Changelog] Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Viresh Kumar
Rafael J. Wysocki
Родитель
95731ebb11
Коммит
bb176f7d03
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@ -3,6 +3,7 @@
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*
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* Copyright (C) 2001 Russell King
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* (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
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* (C) 2013 Viresh Kumar <viresh.kumar@linaro.org>
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*
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* Oct 2005 - Ashok Raj <ashok.raj@intel.com>
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* Added handling for CPU hotplug
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@ -12,7 +13,6 @@
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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@ -44,12 +44,13 @@
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*/
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static struct cpufreq_driver *cpufreq_driver;
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static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data);
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static DEFINE_RWLOCK(cpufreq_driver_lock);
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static DEFINE_MUTEX(cpufreq_governor_lock);
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#ifdef CONFIG_HOTPLUG_CPU
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/* This one keeps track of the previously set governor of a removed CPU */
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static DEFINE_PER_CPU(char[CPUFREQ_NAME_LEN], cpufreq_cpu_governor);
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#endif
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static DEFINE_RWLOCK(cpufreq_driver_lock);
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static DEFINE_MUTEX(cpufreq_governor_lock);
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/*
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* cpu_policy_rwsem is a per CPU reader-writer semaphore designed to cure
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@ -199,7 +200,6 @@ static struct cpufreq_policy *__cpufreq_cpu_get(unsigned int cpu, bool sysfs)
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if (!try_module_get(cpufreq_driver->owner))
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goto err_out_unlock;
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/* get the CPU */
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data = per_cpu(cpufreq_cpu_data, cpu);
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@ -269,7 +269,7 @@ static void cpufreq_cpu_put_sysfs(struct cpufreq_policy *data)
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*/
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#ifndef CONFIG_SMP
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static unsigned long l_p_j_ref;
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static unsigned int l_p_j_ref_freq;
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static unsigned int l_p_j_ref_freq;
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static void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
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{
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@ -282,7 +282,7 @@ static void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
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pr_debug("saving %lu as reference value for loops_per_jiffy; "
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"freq is %u kHz\n", l_p_j_ref, l_p_j_ref_freq);
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}
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if ((val == CPUFREQ_POSTCHANGE && ci->old != ci->new) ||
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if ((val == CPUFREQ_POSTCHANGE && ci->old != ci->new) ||
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(val == CPUFREQ_RESUMECHANGE || val == CPUFREQ_SUSPENDCHANGE)) {
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loops_per_jiffy = cpufreq_scale(l_p_j_ref, l_p_j_ref_freq,
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ci->new);
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@ -297,7 +297,6 @@ static inline void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
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}
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#endif
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void __cpufreq_notify_transition(struct cpufreq_policy *policy,
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struct cpufreq_freqs *freqs, unsigned int state)
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{
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@ -343,6 +342,7 @@ void __cpufreq_notify_transition(struct cpufreq_policy *policy,
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break;
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}
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}
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/**
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* cpufreq_notify_transition - call notifier chain and adjust_jiffies
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* on frequency transition.
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@ -360,7 +360,6 @@ void cpufreq_notify_transition(struct cpufreq_policy *policy,
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EXPORT_SYMBOL_GPL(cpufreq_notify_transition);
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/*********************************************************************
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* SYSFS INTERFACE *
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*********************************************************************/
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@ -425,7 +424,6 @@ out:
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return err;
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}
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/**
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* cpufreq_per_cpu_attr_read() / show_##file_name() -
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* print out cpufreq information
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@ -490,7 +488,6 @@ static ssize_t show_cpuinfo_cur_freq(struct cpufreq_policy *policy,
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return sprintf(buf, "%u\n", cur_freq);
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}
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/**
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* show_scaling_governor - show the current policy for the specified CPU
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*/
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@ -506,7 +503,6 @@ static ssize_t show_scaling_governor(struct cpufreq_policy *policy, char *buf)
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return -EINVAL;
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}
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/**
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* store_scaling_governor - store policy for the specified CPU
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*/
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@ -529,8 +525,10 @@ static ssize_t store_scaling_governor(struct cpufreq_policy *policy,
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&new_policy.governor))
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return -EINVAL;
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/* Do not use cpufreq_set_policy here or the user_policy.max
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will be wrongly overridden */
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/*
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* Do not use cpufreq_set_policy here or the user_policy.max
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* will be wrongly overridden
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*/
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ret = __cpufreq_set_policy(policy, &new_policy);
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policy->user_policy.policy = policy->policy;
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@ -1094,7 +1092,8 @@ static void update_policy_cpu(struct cpufreq_policy *policy, unsigned int cpu)
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* Caller should already have policy_rwsem in write mode for this CPU.
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* This routine frees the rwsem before returning.
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*/
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static int __cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif)
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static int __cpufreq_remove_dev(struct device *dev,
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struct subsys_interface *sif)
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{
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unsigned int cpu = dev->id, ret, cpus;
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unsigned long flags;
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@ -1201,7 +1200,6 @@ static int __cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif
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return 0;
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}
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static int cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif)
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{
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unsigned int cpu = dev->id;
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@ -1214,7 +1212,6 @@ static int cpufreq_remove_dev(struct device *dev, struct subsys_interface *sif)
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return retval;
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}
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static void handle_update(struct work_struct *work)
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{
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struct cpufreq_policy *policy =
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@ -1225,7 +1222,8 @@ static void handle_update(struct work_struct *work)
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}
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/**
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* cpufreq_out_of_sync - If actual and saved CPU frequency differs, we're in deep trouble.
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* cpufreq_out_of_sync - If actual and saved CPU frequency differs, we're
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* in deep trouble.
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* @cpu: cpu number
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* @old_freq: CPU frequency the kernel thinks the CPU runs at
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* @new_freq: CPU frequency the CPU actually runs at
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@ -1240,7 +1238,6 @@ static void cpufreq_out_of_sync(unsigned int cpu, unsigned int old_freq,
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struct cpufreq_freqs freqs;
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unsigned long flags;
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pr_debug("Warning: CPU frequency out of sync: cpufreq and timing "
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"core thinks of %u, is %u kHz.\n", old_freq, new_freq);
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@ -1255,7 +1252,6 @@ static void cpufreq_out_of_sync(unsigned int cpu, unsigned int old_freq,
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cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
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}
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/**
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* cpufreq_quick_get - get the CPU frequency (in kHz) from policy->cur
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* @cpu: CPU number
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@ -1301,7 +1297,6 @@ unsigned int cpufreq_quick_get_max(unsigned int cpu)
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}
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EXPORT_SYMBOL(cpufreq_quick_get_max);
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static unsigned int __cpufreq_get(unsigned int cpu)
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{
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struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
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@ -1360,7 +1355,6 @@ static struct subsys_interface cpufreq_interface = {
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.remove_dev = cpufreq_remove_dev,
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};
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/**
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* cpufreq_bp_suspend - Prepare the boot CPU for system suspend.
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*
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@ -1497,11 +1491,10 @@ int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list)
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}
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EXPORT_SYMBOL(cpufreq_register_notifier);
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/**
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* cpufreq_unregister_notifier - unregister a driver with cpufreq
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* @nb: notifier block to be unregistered
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* @list: CPUFREQ_TRANSITION_NOTIFIER or CPUFREQ_POLICY_NOTIFIER
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* @list: CPUFREQ_TRANSITION_NOTIFIER or CPUFREQ_POLICY_NOTIFIER
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*
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* Remove a driver from the CPU frequency notifier list.
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*
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@ -1537,7 +1530,6 @@ EXPORT_SYMBOL(cpufreq_unregister_notifier);
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* GOVERNORS *
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*********************************************************************/
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int __cpufreq_driver_target(struct cpufreq_policy *policy,
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unsigned int target_freq,
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unsigned int relation)
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@ -1678,7 +1670,6 @@ static int __cpufreq_governor(struct cpufreq_policy *policy,
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return ret;
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}
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int cpufreq_register_governor(struct cpufreq_governor *governor)
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{
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int err;
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@ -1703,7 +1694,6 @@ int cpufreq_register_governor(struct cpufreq_governor *governor)
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}
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EXPORT_SYMBOL_GPL(cpufreq_register_governor);
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void cpufreq_unregister_governor(struct cpufreq_governor *governor)
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{
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#ifdef CONFIG_HOTPLUG_CPU
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@ -1733,7 +1723,6 @@ void cpufreq_unregister_governor(struct cpufreq_governor *governor)
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EXPORT_SYMBOL_GPL(cpufreq_unregister_governor);
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/*********************************************************************
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* POLICY INTERFACE *
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*********************************************************************/
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@ -1762,7 +1751,6 @@ int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu)
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}
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EXPORT_SYMBOL(cpufreq_get_policy);
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/*
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* data : current policy.
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* policy : policy to be set.
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@ -1796,8 +1784,10 @@ static int __cpufreq_set_policy(struct cpufreq_policy *data,
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blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
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CPUFREQ_INCOMPATIBLE, policy);
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/* verify the cpu speed can be set within this limit,
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which might be different to the first one */
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/*
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* verify the cpu speed can be set within this limit, which might be
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* different to the first one
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*/
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ret = cpufreq_driver->verify(policy);
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if (ret)
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goto error_out;
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@ -1899,8 +1889,10 @@ int cpufreq_update_policy(unsigned int cpu)
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policy.policy = data->user_policy.policy;
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policy.governor = data->user_policy.governor;
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/* BIOS might change freq behind our back
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-> ask driver for current freq and notify governors about a change */
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/*
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* BIOS might change freq behind our back
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* -> ask driver for current freq and notify governors about a change
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*/
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if (cpufreq_driver->get) {
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policy.cur = cpufreq_driver->get(cpu);
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if (!data->cur) {
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@ -1949,7 +1941,7 @@ static int __cpuinit cpufreq_cpu_callback(struct notifier_block *nfb,
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}
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static struct notifier_block __refdata cpufreq_cpu_notifier = {
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.notifier_call = cpufreq_cpu_callback,
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.notifier_call = cpufreq_cpu_callback,
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};
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/*********************************************************************
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@ -1961,7 +1953,7 @@ static struct notifier_block __refdata cpufreq_cpu_notifier = {
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* @driver_data: A struct cpufreq_driver containing the values#
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* submitted by the CPU Frequency driver.
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*
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* Registers a CPU Frequency driver to this core code. This code
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* Registers a CPU Frequency driver to this core code. This code
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* returns zero on success, -EBUSY when another driver got here first
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* (and isn't unregistered in the meantime).
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*
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@ -2028,11 +2020,10 @@ err_null_driver:
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}
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EXPORT_SYMBOL_GPL(cpufreq_register_driver);
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/**
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* cpufreq_unregister_driver - unregister the current CPUFreq driver
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*
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* Unregister the current CPUFreq driver. Only call this if you have
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* Unregister the current CPUFreq driver. Only call this if you have
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* the right to do so, i.e. if you have succeeded in initialising before!
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* Returns zero if successful, and -EINVAL if the cpufreq_driver is
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* currently not initialised.
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@ -81,7 +81,7 @@ static ssize_t show_##file_name##_gov_sys \
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return sprintf(buf, "%u\n", tuners->file_name); \
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} \
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\
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static ssize_t show_##file_name##_gov_pol \
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static ssize_t show_##file_name##_gov_pol \
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(struct cpufreq_policy *policy, char *buf) \
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{ \
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struct dbs_data *dbs_data = policy->governor_data; \
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@ -91,7 +91,7 @@ static ssize_t show_##file_name##_gov_pol \
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#define store_one(_gov, file_name) \
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static ssize_t store_##file_name##_gov_sys \
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(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count) \
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(struct kobject *kobj, struct attribute *attr, const char *buf, size_t count) \
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{ \
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struct dbs_data *dbs_data = _gov##_dbs_cdata.gdbs_data; \
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return store_##file_name(dbs_data, buf, count); \
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@ -17,7 +17,6 @@
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#include <linux/cpufreq.h>
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#include <linux/init.h>
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static int cpufreq_governor_performance(struct cpufreq_policy *policy,
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unsigned int event)
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{
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@ -44,19 +43,16 @@ struct cpufreq_governor cpufreq_gov_performance = {
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.owner = THIS_MODULE,
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};
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static int __init cpufreq_gov_performance_init(void)
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{
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return cpufreq_register_governor(&cpufreq_gov_performance);
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}
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static void __exit cpufreq_gov_performance_exit(void)
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{
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cpufreq_unregister_governor(&cpufreq_gov_performance);
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}
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MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
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MODULE_DESCRIPTION("CPUfreq policy governor 'performance'");
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MODULE_LICENSE("GPL");
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@ -1,7 +1,7 @@
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/*
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* linux/drivers/cpufreq/cpufreq_powersave.c
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* linux/drivers/cpufreq/cpufreq_powersave.c
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*
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* Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
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* Copyright (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
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*
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*
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* This program is free software; you can redistribute it and/or modify
|
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@ -48,13 +48,11 @@ static int __init cpufreq_gov_powersave_init(void)
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return cpufreq_register_governor(&cpufreq_gov_powersave);
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}
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static void __exit cpufreq_gov_powersave_exit(void)
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{
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cpufreq_unregister_governor(&cpufreq_gov_powersave);
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}
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MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>");
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MODULE_DESCRIPTION("CPUfreq policy governor 'powersave'");
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MODULE_LICENSE("GPL");
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|
|
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@ -27,7 +27,7 @@ static spinlock_t cpufreq_stats_lock;
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struct cpufreq_stats {
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unsigned int cpu;
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unsigned int total_trans;
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unsigned long long last_time;
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unsigned long long last_time;
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unsigned int max_state;
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unsigned int state_num;
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unsigned int last_index;
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@ -116,7 +116,7 @@ static ssize_t show_trans_table(struct cpufreq_policy *policy, char *buf)
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len += snprintf(buf + len, PAGE_SIZE - len, "%9u: ",
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stat->freq_table[i]);
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for (j = 0; j < stat->state_num; j++) {
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for (j = 0; j < stat->state_num; j++) {
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if (len >= PAGE_SIZE)
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break;
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len += snprintf(buf + len, PAGE_SIZE - len, "%9u ",
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|
|
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@ -55,7 +55,6 @@ static int cpufreq_set(struct cpufreq_policy *policy, unsigned int freq)
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return ret;
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}
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static ssize_t show_speed(struct cpufreq_policy *policy, char *buf)
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{
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return sprintf(buf, "%u\n", policy->cur);
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@ -101,7 +100,6 @@ static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
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return rc;
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}
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|
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#ifndef CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE
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static
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#endif
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|
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@ -118,13 +116,11 @@ static int __init cpufreq_gov_userspace_init(void)
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return cpufreq_register_governor(&cpufreq_gov_userspace);
|
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}
|
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|
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static void __exit cpufreq_gov_userspace_exit(void)
|
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{
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cpufreq_unregister_governor(&cpufreq_gov_userspace);
|
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}
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MODULE_AUTHOR("Dominik Brodowski <linux@brodo.de>, "
|
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"Russell King <rmk@arm.linux.org.uk>");
|
||||
MODULE_DESCRIPTION("CPUfreq policy governor 'userspace'");
|
||||
|
|
|
|||
|
|
@ -1,8 +1,8 @@
|
|||
/*
|
||||
* linux/include/linux/cpufreq.h
|
||||
* linux/include/linux/cpufreq.h
|
||||
*
|
||||
* Copyright (C) 2001 Russell King
|
||||
* (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
|
||||
* Copyright (C) 2001 Russell King
|
||||
* (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
|
|
@ -26,7 +26,6 @@
|
|||
/* Print length for names. Extra 1 space for accomodating '\n' in prints */
|
||||
#define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1)
|
||||
|
||||
|
||||
/*********************************************************************
|
||||
* CPUFREQ NOTIFIER INTERFACE *
|
||||
*********************************************************************/
|
||||
|
|
@ -153,17 +152,18 @@ struct cpufreq_freqs {
|
|||
u8 flags; /* flags of cpufreq_driver, see below. */
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch safe)
|
||||
* cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
|
||||
* safe)
|
||||
* @old: old value
|
||||
* @div: divisor
|
||||
* @mult: multiplier
|
||||
*
|
||||
*
|
||||
* new = old * mult / div
|
||||
* new = old * mult / div
|
||||
*/
|
||||
static inline unsigned long cpufreq_scale(unsigned long old, u_int div, u_int mult)
|
||||
static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
|
||||
u_int mult)
|
||||
{
|
||||
#if BITS_PER_LONG == 32
|
||||
|
||||
|
|
@ -216,14 +216,12 @@ extern int __cpufreq_driver_target(struct cpufreq_policy *policy,
|
|||
unsigned int target_freq,
|
||||
unsigned int relation);
|
||||
|
||||
|
||||
extern int __cpufreq_driver_getavg(struct cpufreq_policy *policy,
|
||||
unsigned int cpu);
|
||||
|
||||
int cpufreq_register_governor(struct cpufreq_governor *governor);
|
||||
void cpufreq_unregister_governor(struct cpufreq_governor *governor);
|
||||
|
||||
|
||||
/*********************************************************************
|
||||
* CPUFREQ DRIVER INTERFACE *
|
||||
*********************************************************************/
|
||||
|
|
@ -234,7 +232,7 @@ void cpufreq_unregister_governor(struct cpufreq_governor *governor);
|
|||
struct freq_attr;
|
||||
|
||||
struct cpufreq_driver {
|
||||
struct module *owner;
|
||||
struct module *owner;
|
||||
char name[CPUFREQ_NAME_LEN];
|
||||
u8 flags;
|
||||
/*
|
||||
|
|
@ -282,11 +280,11 @@ struct cpufreq_driver {
|
|||
int cpufreq_register_driver(struct cpufreq_driver *driver_data);
|
||||
int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
|
||||
|
||||
|
||||
void cpufreq_notify_transition(struct cpufreq_policy *policy,
|
||||
struct cpufreq_freqs *freqs, unsigned int state);
|
||||
|
||||
static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, unsigned int min, unsigned int max)
|
||||
static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
|
||||
unsigned int min, unsigned int max)
|
||||
{
|
||||
if (policy->min < min)
|
||||
policy->min = min;
|
||||
|
|
@ -349,7 +347,9 @@ bool have_governor_per_policy(void);
|
|||
struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
|
||||
|
||||
#ifdef CONFIG_CPU_FREQ
|
||||
/* query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it */
|
||||
/*
|
||||
* query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it
|
||||
*/
|
||||
unsigned int cpufreq_get(unsigned int cpu);
|
||||
#else
|
||||
static inline unsigned int cpufreq_get(unsigned int cpu)
|
||||
|
|
@ -358,7 +358,9 @@ static inline unsigned int cpufreq_get(unsigned int cpu)
|
|||
}
|
||||
#endif
|
||||
|
||||
/* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it */
|
||||
/*
|
||||
* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it
|
||||
*/
|
||||
#ifdef CONFIG_CPU_FREQ
|
||||
unsigned int cpufreq_quick_get(unsigned int cpu);
|
||||
unsigned int cpufreq_quick_get_max(unsigned int cpu);
|
||||
|
|
@ -373,16 +375,14 @@ static inline unsigned int cpufreq_quick_get_max(unsigned int cpu)
|
|||
}
|
||||
#endif
|
||||
|
||||
|
||||
/*********************************************************************
|
||||
* CPUFREQ DEFAULT GOVERNOR *
|
||||
*********************************************************************/
|
||||
|
||||
|
||||
/*
|
||||
Performance governor is fallback governor if any other gov failed to
|
||||
auto load due latency restrictions
|
||||
*/
|
||||
* Performance governor is fallback governor if any other gov failed to auto
|
||||
* load due latency restrictions
|
||||
*/
|
||||
#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE
|
||||
extern struct cpufreq_governor cpufreq_gov_performance;
|
||||
#endif
|
||||
|
|
@ -402,7 +402,6 @@ extern struct cpufreq_governor cpufreq_gov_conservative;
|
|||
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative)
|
||||
#endif
|
||||
|
||||
|
||||
/*********************************************************************
|
||||
* FREQUENCY TABLE HELPERS *
|
||||
*********************************************************************/
|
||||
|
|
|
|||
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