Signed-off-by: Aaron Wu <aaron...@analog.com>

Remove Blackfin CPU frequency support
---
 drivers/cpufreq/Makefile           |    1 -
 drivers/cpufreq/blackfin-cpufreq.c |  217 ---
 drivers/cpufreq/cpufreq.c          | 2612 ------------------------------------
 3 files changed, 2830 deletions(-)
 delete mode 100644 drivers/cpufreq/blackfin-cpufreq.c
 delete mode 100644 drivers/cpufreq/cpufreq.c

diff --git a/drivers/cpufreq/Makefile b/drivers/cpufreq/Makefile
index c60c1e1..43e4254 100644
--- a/drivers/cpufreq/Makefile
+++ b/drivers/cpufreq/Makefile
@@ -100,7 +100,6 @@ obj-$(CONFIG_POWERNV_CPUFREQ)               += 
powernv-cpufreq.o
 
 
##################################################################################
 # Other platform drivers
-obj-$(CONFIG_BFIN_CPU_FREQ)            += blackfin-cpufreq.o
 obj-$(CONFIG_BMIPS_CPUFREQ)            += bmips-cpufreq.o
 obj-$(CONFIG_CRIS_MACH_ARTPEC3)                += cris-artpec3-cpufreq.o
 obj-$(CONFIG_ETRAXFS)                  += cris-etraxfs-cpufreq.o
diff --git a/drivers/cpufreq/blackfin-cpufreq.c 
b/drivers/cpufreq/blackfin-cpufreq.c
deleted file mode 100644
index 12e97d8..0000000
--- a/drivers/cpufreq/blackfin-cpufreq.c
+++ /dev/null
@@ -1,217 +0,0 @@
-/*
- * Blackfin core clock scaling
- *
- * Copyright 2008-2011 Analog Devices Inc.
- *
- * Licensed under the GPL-2 or later.
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/init.h>
-#include <linux/clk.h>
-#include <linux/cpufreq.h>
-#include <linux/fs.h>
-#include <linux/delay.h>
-#include <asm/blackfin.h>
-#include <asm/time.h>
-#include <asm/dpmc.h>
-
-
-/* this is the table of CCLK frequencies, in Hz */
-/* .driver_data is the entry in the auxiliary dpm_state_table[] */
-static struct cpufreq_frequency_table bfin_freq_table[] = {
-       {
-               .frequency = CPUFREQ_TABLE_END,
-               .driver_data = 0,
-       },
-       {
-               .frequency = CPUFREQ_TABLE_END,
-               .driver_data = 1,
-       },
-       {
-               .frequency = CPUFREQ_TABLE_END,
-               .driver_data = 2,
-       },
-       {
-               .frequency = CPUFREQ_TABLE_END,
-               .driver_data = 0,
-       },
-};
-
-static struct bfin_dpm_state {
-       unsigned int csel; /* system clock divider */
-       unsigned int tscale; /* change the divider on the core timer interrupt 
*/
-} dpm_state_table[3];
-
-#if defined(CONFIG_CYCLES_CLOCKSOURCE)
-/*
- * normalized to maximum frequency offset for CYCLES,
- * used in time-ts cycles clock source, but could be used
- * somewhere also.
- */
-unsigned long long __bfin_cycles_off;
-unsigned int __bfin_cycles_mod;
-#endif
-
-/**************************************************************************/
-static void __init bfin_init_tables(unsigned long cclk, unsigned long sclk)
-{
-
-       unsigned long csel, min_cclk;
-       int index;
-
-       /* Anomaly 273 seems to still exist on non-BF54x w/dcache turned on */
-#if ANOMALY_05000273 || ANOMALY_05000274 || \
-       (!(defined(CONFIG_BF54x) || defined(CONFIG_BF60x)) \
-       && defined(CONFIG_BFIN_EXTMEM_DCACHEABLE))
-       min_cclk = sclk * 2;
-#else
-       min_cclk = sclk;
-#endif
-
-#ifndef CONFIG_BF60x
-       csel = ((bfin_read_PLL_DIV() & CSEL) >> 4);
-#else
-       csel = bfin_read32(CGU0_DIV) & 0x1F;
-#endif
-
-       for (index = 0;  (cclk >> index) >= min_cclk && csel <= 3 && index < 3; 
index++, csel++) {
-               bfin_freq_table[index].frequency = cclk >> index;
-#ifndef CONFIG_BF60x
-               dpm_state_table[index].csel = csel << 4; /* Shift now into 
PLL_DIV bitpos */
-#else
-               dpm_state_table[index].csel = csel;
-#endif
-               dpm_state_table[index].tscale =  (TIME_SCALE >> index) - 1;
-
-               pr_debug("cpufreq: freq:%d csel:0x%x tscale:%d\n",
-                                                
bfin_freq_table[index].frequency,
-                                                dpm_state_table[index].csel,
-                                                dpm_state_table[index].tscale);
-       }
-       return;
-}
-
-static void bfin_adjust_core_timer(void *info)
-{
-       unsigned int tscale;
-       unsigned int index = *(unsigned int *)info;
-
-       /* we have to adjust the core timer, because it is using cclk */
-       tscale = dpm_state_table[index].tscale;
-       bfin_write_TSCALE(tscale);
-       return;
-}
-
-static unsigned int bfin_getfreq_khz(unsigned int cpu)
-{
-       /* Both CoreA/B have the same core clock */
-       return get_cclk() / 1000;
-}
-
-#ifdef CONFIG_BF60x
-static int cpu_set_cclk(int cpu, unsigned long new)
-{
-       struct clk *clk;
-       int ret;
-
-       clk = clk_get(NULL, "CCLK");
-       if (IS_ERR(clk))
-               return -ENODEV;
-
-       ret = clk_set_rate(clk, new);
-       clk_put(clk);
-       return ret;
-}
-#endif
-
-static int bfin_target(struct cpufreq_policy *policy, unsigned int index)
-{
-#ifndef CONFIG_BF60x
-       unsigned int plldiv;
-#endif
-       static unsigned long lpj_ref;
-       static unsigned int  lpj_ref_freq;
-       unsigned int old_freq, new_freq;
-       int ret = 0;
-
-#if defined(CONFIG_CYCLES_CLOCKSOURCE)
-       cycles_t cycles;
-#endif
-
-       old_freq = bfin_getfreq_khz(0);
-       new_freq = bfin_freq_table[index].frequency;
-
-#ifndef CONFIG_BF60x
-       plldiv = (bfin_read_PLL_DIV() & SSEL) | dpm_state_table[index].csel;
-       bfin_write_PLL_DIV(plldiv);
-#else
-       ret = cpu_set_cclk(policy->cpu, new_freq * 1000);
-       if (ret != 0) {
-               WARN_ONCE(ret, "cpufreq set freq failed %d\n", ret);
-               return ret;
-       }
-#endif
-       on_each_cpu(bfin_adjust_core_timer, &index, 1);
-#if defined(CONFIG_CYCLES_CLOCKSOURCE)
-       cycles = get_cycles();
-       SSYNC();
-       cycles += 10; /* ~10 cycles we lose after get_cycles() */
-       __bfin_cycles_off += (cycles << __bfin_cycles_mod) - (cycles << index);
-       __bfin_cycles_mod = index;
-#endif
-       if (!lpj_ref_freq) {
-               lpj_ref = loops_per_jiffy;
-               lpj_ref_freq = old_freq;
-       }
-       if (new_freq != old_freq) {
-               loops_per_jiffy = cpufreq_scale(lpj_ref,
-                               lpj_ref_freq, new_freq);
-       }
-
-       return ret;
-}
-
-static int __bfin_cpu_init(struct cpufreq_policy *policy)
-{
-
-       unsigned long cclk, sclk;
-
-       cclk = get_cclk() / 1000;
-       sclk = get_sclk() / 1000;
-
-       if (policy->cpu == CPUFREQ_CPU)
-               bfin_init_tables(cclk, sclk);
-
-       policy->cpuinfo.transition_latency = 50000; /* 50us assumed */
-
-       return cpufreq_table_validate_and_show(policy, bfin_freq_table);
-}
-
-static struct cpufreq_driver bfin_driver = {
-       .verify = cpufreq_generic_frequency_table_verify,
-       .target_index = bfin_target,
-       .get = bfin_getfreq_khz,
-       .init = __bfin_cpu_init,
-       .name = "bfin cpufreq",
-       .attr = cpufreq_generic_attr,
-};
-
-static int __init bfin_cpu_init(void)
-{
-       return cpufreq_register_driver(&bfin_driver);
-}
-
-static void __exit bfin_cpu_exit(void)
-{
-       cpufreq_unregister_driver(&bfin_driver);
-}
-
-MODULE_AUTHOR("Michael Hennerich <henner...@blackfin.uclinux.org>");
-MODULE_DESCRIPTION("cpufreq driver for Blackfin");
-MODULE_LICENSE("GPL");
-
-module_init(bfin_cpu_init);
-module_exit(bfin_cpu_exit);
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
deleted file mode 100644
index de33ebf..0000000
--- a/drivers/cpufreq/cpufreq.c
+++ /dev/null
@@ -1,2612 +0,0 @@
-/*
- *  linux/drivers/cpufreq/cpufreq.c
- *
- *  Copyright (C) 2001 Russell King
- *            (C) 2002 - 2003 Dominik Brodowski <li...@brodo.de>
- *            (C) 2013 Viresh Kumar <viresh.ku...@linaro.org>
- *
- *  Oct 2005 - Ashok Raj <ashok....@intel.com>
- *     Added handling for CPU hotplug
- *  Feb 2006 - Jacob Shin <jacob.s...@amd.com>
- *     Fix handling for CPU hotplug -- affected CPUs
- *
- * 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
- * published by the Free Software Foundation.
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/cpu.h>
-#include <linux/cpufreq.h>
-#include <linux/delay.h>
-#include <linux/device.h>
-#include <linux/init.h>
-#include <linux/kernel_stat.h>
-#include <linux/module.h>
-#include <linux/mutex.h>
-#include <linux/slab.h>
-#include <linux/suspend.h>
-#include <linux/syscore_ops.h>
-#include <linux/tick.h>
-#include <trace/events/power.h>
-
-static LIST_HEAD(cpufreq_policy_list);
-
-static inline bool policy_is_inactive(struct cpufreq_policy *policy)
-{
-       return cpumask_empty(policy->cpus);
-}
-
-/* Macros to iterate over CPU policies */
-#define for_each_suitable_policy(__policy, __active)                    \
-       list_for_each_entry(__policy, &cpufreq_policy_list, policy_list) \
-               if ((__active) == !policy_is_inactive(__policy))
-
-#define for_each_active_policy(__policy)               \
-       for_each_suitable_policy(__policy, true)
-#define for_each_inactive_policy(__policy)             \
-       for_each_suitable_policy(__policy, false)
-
-#define for_each_policy(__policy)                      \
-       list_for_each_entry(__policy, &cpufreq_policy_list, policy_list)
-
-/* Iterate over governors */
-static LIST_HEAD(cpufreq_governor_list);
-#define for_each_governor(__governor)                          \
-       list_for_each_entry(__governor, &cpufreq_governor_list, governor_list)
-
-/**
- * The "cpufreq driver" - the arch- or hardware-dependent low
- * level driver of CPUFreq support, and its spinlock. This lock
- * also protects the cpufreq_cpu_data array.
- */
-static struct cpufreq_driver *cpufreq_driver;
-static DEFINE_PER_CPU(struct cpufreq_policy *, cpufreq_cpu_data);
-static DEFINE_RWLOCK(cpufreq_driver_lock);
-
-/* Flag to suspend/resume CPUFreq governors */
-static bool cpufreq_suspended;
-
-static inline bool has_target(void)
-{
-       return cpufreq_driver->target_index || cpufreq_driver->target;
-}
-
-/* internal prototypes */
-static unsigned int __cpufreq_get(struct cpufreq_policy *policy);
-static int cpufreq_init_governor(struct cpufreq_policy *policy);
-static void cpufreq_exit_governor(struct cpufreq_policy *policy);
-static int cpufreq_start_governor(struct cpufreq_policy *policy);
-static void cpufreq_stop_governor(struct cpufreq_policy *policy);
-static void cpufreq_governor_limits(struct cpufreq_policy *policy);
-
-/**
- * Two notifier lists: the "policy" list is involved in the
- * validation process for a new CPU frequency policy; the
- * "transition" list for kernel code that needs to handle
- * changes to devices when the CPU clock speed changes.
- * The mutex locks both lists.
- */
-static BLOCKING_NOTIFIER_HEAD(cpufreq_policy_notifier_list);
-static struct srcu_notifier_head cpufreq_transition_notifier_list;
-
-static bool init_cpufreq_transition_notifier_list_called;
-static int __init init_cpufreq_transition_notifier_list(void)
-{
-       srcu_init_notifier_head(&cpufreq_transition_notifier_list);
-       init_cpufreq_transition_notifier_list_called = true;
-       return 0;
-}
-pure_initcall(init_cpufreq_transition_notifier_list);
-
-static int off __read_mostly;
-static int cpufreq_disabled(void)
-{
-       return off;
-}
-void disable_cpufreq(void)
-{
-       off = 1;
-}
-static DEFINE_MUTEX(cpufreq_governor_mutex);
-
-bool have_governor_per_policy(void)
-{
-       return !!(cpufreq_driver->flags & CPUFREQ_HAVE_GOVERNOR_PER_POLICY);
-}
-EXPORT_SYMBOL_GPL(have_governor_per_policy);
-
-struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy)
-{
-       if (have_governor_per_policy())
-               return &policy->kobj;
-       else
-               return cpufreq_global_kobject;
-}
-EXPORT_SYMBOL_GPL(get_governor_parent_kobj);
-
-static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
-{
-       u64 idle_time;
-       u64 cur_wall_time;
-       u64 busy_time;
-
-       cur_wall_time = jiffies64_to_nsecs(get_jiffies_64());
-
-       busy_time = kcpustat_cpu(cpu).cpustat[CPUTIME_USER];
-       busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SYSTEM];
-       busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_IRQ];
-       busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_SOFTIRQ];
-       busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_STEAL];
-       busy_time += kcpustat_cpu(cpu).cpustat[CPUTIME_NICE];
-
-       idle_time = cur_wall_time - busy_time;
-       if (wall)
-               *wall = div_u64(cur_wall_time, NSEC_PER_USEC);
-
-       return div_u64(idle_time, NSEC_PER_USEC);
-}
-
-u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy)
-{
-       u64 idle_time = get_cpu_idle_time_us(cpu, io_busy ? wall : NULL);
-
-       if (idle_time == -1ULL)
-               return get_cpu_idle_time_jiffy(cpu, wall);
-       else if (!io_busy)
-               idle_time += get_cpu_iowait_time_us(cpu, wall);
-
-       return idle_time;
-}
-EXPORT_SYMBOL_GPL(get_cpu_idle_time);
-
-__weak void arch_set_freq_scale(struct cpumask *cpus, unsigned long cur_freq,
-               unsigned long max_freq)
-{
-}
-EXPORT_SYMBOL_GPL(arch_set_freq_scale);
-
-/*
- * This is a generic cpufreq init() routine which can be used by cpufreq
- * drivers of SMP systems. It will do following:
- * - validate & show freq table passed
- * - set policies transition latency
- * - policy->cpus with all possible CPUs
- */
-int cpufreq_generic_init(struct cpufreq_policy *policy,
-               struct cpufreq_frequency_table *table,
-               unsigned int transition_latency)
-{
-       int ret;
-
-       ret = cpufreq_table_validate_and_show(policy, table);
-       if (ret) {
-               pr_err("%s: invalid frequency table: %d\n", __func__, ret);
-               return ret;
-       }
-
-       policy->cpuinfo.transition_latency = transition_latency;
-
-       /*
-        * The driver only supports the SMP configuration where all processors
-        * share the clock and voltage and clock.
-        */
-       cpumask_setall(policy->cpus);
-
-       return 0;
-}
-EXPORT_SYMBOL_GPL(cpufreq_generic_init);
-
-struct cpufreq_policy *cpufreq_cpu_get_raw(unsigned int cpu)
-{
-       struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
-
-       return policy && cpumask_test_cpu(cpu, policy->cpus) ? policy : NULL;
-}
-EXPORT_SYMBOL_GPL(cpufreq_cpu_get_raw);
-
-unsigned int cpufreq_generic_get(unsigned int cpu)
-{
-       struct cpufreq_policy *policy = cpufreq_cpu_get_raw(cpu);
-
-       if (!policy || IS_ERR(policy->clk)) {
-               pr_err("%s: No %s associated to cpu: %d\n",
-                      __func__, policy ? "clk" : "policy", cpu);
-               return 0;
-       }
-
-       return clk_get_rate(policy->clk) / 1000;
-}
-EXPORT_SYMBOL_GPL(cpufreq_generic_get);
-
-/**
- * cpufreq_cpu_get: returns policy for a cpu and marks it busy.
- *
- * @cpu: cpu to find policy for.
- *
- * This returns policy for 'cpu', returns NULL if it doesn't exist.
- * It also increments the kobject reference count to mark it busy and so would
- * require a corresponding call to cpufreq_cpu_put() to decrement it back.
- * If corresponding call cpufreq_cpu_put() isn't made, the policy wouldn't be
- * freed as that depends on the kobj count.
- *
- * Return: A valid policy on success, otherwise NULL on failure.
- */
-struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu)
-{
-       struct cpufreq_policy *policy = NULL;
-       unsigned long flags;
-
-       if (WARN_ON(cpu >= nr_cpu_ids))
-               return NULL;
-
-       /* get the cpufreq driver */
-       read_lock_irqsave(&cpufreq_driver_lock, flags);
-
-       if (cpufreq_driver) {
-               /* get the CPU */
-               policy = cpufreq_cpu_get_raw(cpu);
-               if (policy)
-                       kobject_get(&policy->kobj);
-       }
-
-       read_unlock_irqrestore(&cpufreq_driver_lock, flags);
-
-       return policy;
-}
-EXPORT_SYMBOL_GPL(cpufreq_cpu_get);
-
-/**
- * cpufreq_cpu_put: Decrements the usage count of a policy
- *
- * @policy: policy earlier returned by cpufreq_cpu_get().
- *
- * This decrements the kobject reference count incremented earlier by calling
- * cpufreq_cpu_get().
- */
-void cpufreq_cpu_put(struct cpufreq_policy *policy)
-{
-       kobject_put(&policy->kobj);
-}
-EXPORT_SYMBOL_GPL(cpufreq_cpu_put);
-
-/*********************************************************************
- *            EXTERNALLY AFFECTING FREQUENCY CHANGES                 *
- *********************************************************************/
-
-/**
- * adjust_jiffies - adjust the system "loops_per_jiffy"
- *
- * This function alters the system "loops_per_jiffy" for the clock
- * speed change. Note that loops_per_jiffy cannot be updated on SMP
- * systems as each CPU might be scaled differently. So, use the arch
- * per-CPU loops_per_jiffy value wherever possible.
- */
-static void adjust_jiffies(unsigned long val, struct cpufreq_freqs *ci)
-{
-#ifndef CONFIG_SMP
-       static unsigned long l_p_j_ref;
-       static unsigned int l_p_j_ref_freq;
-
-       if (ci->flags & CPUFREQ_CONST_LOOPS)
-               return;
-
-       if (!l_p_j_ref_freq) {
-               l_p_j_ref = loops_per_jiffy;
-               l_p_j_ref_freq = ci->old;
-               pr_debug("saving %lu as reference value for loops_per_jiffy; 
freq is %u kHz\n",
-                        l_p_j_ref, l_p_j_ref_freq);
-       }
-       if (val == CPUFREQ_POSTCHANGE && ci->old != ci->new) {
-               loops_per_jiffy = cpufreq_scale(l_p_j_ref, l_p_j_ref_freq,
-                                                               ci->new);
-               pr_debug("scaling loops_per_jiffy to %lu for frequency %u 
kHz\n",
-                        loops_per_jiffy, ci->new);
-       }
-#endif
-}
-
-static void __cpufreq_notify_transition(struct cpufreq_policy *policy,
-               struct cpufreq_freqs *freqs, unsigned int state)
-{
-       BUG_ON(irqs_disabled());
-
-       if (cpufreq_disabled())
-               return;
-
-       freqs->flags = cpufreq_driver->flags;
-       pr_debug("notification %u of frequency transition to %u kHz\n",
-                state, freqs->new);
-
-       switch (state) {
-
-       case CPUFREQ_PRECHANGE:
-               /* detect if the driver reported a value as "old frequency"
-                * which is not equal to what the cpufreq core thinks is
-                * "old frequency".
-                */
-               if (!(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) {
-                       if ((policy) && (policy->cpu == freqs->cpu) &&
-                           (policy->cur) && (policy->cur != freqs->old)) {
-                               pr_debug("Warning: CPU frequency is %u, cpufreq 
assumed %u kHz\n",
-                                        freqs->old, policy->cur);
-                               freqs->old = policy->cur;
-                       }
-               }
-               srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
-                               CPUFREQ_PRECHANGE, freqs);
-               adjust_jiffies(CPUFREQ_PRECHANGE, freqs);
-               break;
-
-       case CPUFREQ_POSTCHANGE:
-               adjust_jiffies(CPUFREQ_POSTCHANGE, freqs);
-               pr_debug("FREQ: %lu - CPU: %lu\n",
-                        (unsigned long)freqs->new, (unsigned long)freqs->cpu);
-               trace_cpu_frequency(freqs->new, freqs->cpu);
-               cpufreq_stats_record_transition(policy, freqs->new);
-               srcu_notifier_call_chain(&cpufreq_transition_notifier_list,
-                               CPUFREQ_POSTCHANGE, freqs);
-               if (likely(policy) && likely(policy->cpu == freqs->cpu))
-                       policy->cur = freqs->new;
-               break;
-       }
-}
-
-/**
- * cpufreq_notify_transition - call notifier chain and adjust_jiffies
- * on frequency transition.
- *
- * This function calls the transition notifiers and the "adjust_jiffies"
- * function. It is called twice on all CPU frequency changes that have
- * external effects.
- */
-static void cpufreq_notify_transition(struct cpufreq_policy *policy,
-               struct cpufreq_freqs *freqs, unsigned int state)
-{
-       for_each_cpu(freqs->cpu, policy->cpus)
-               __cpufreq_notify_transition(policy, freqs, state);
-}
-
-/* Do post notifications when there are chances that transition has failed */
-static void cpufreq_notify_post_transition(struct cpufreq_policy *policy,
-               struct cpufreq_freqs *freqs, int transition_failed)
-{
-       cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE);
-       if (!transition_failed)
-               return;
-
-       swap(freqs->old, freqs->new);
-       cpufreq_notify_transition(policy, freqs, CPUFREQ_PRECHANGE);
-       cpufreq_notify_transition(policy, freqs, CPUFREQ_POSTCHANGE);
-}
-
-void cpufreq_freq_transition_begin(struct cpufreq_policy *policy,
-               struct cpufreq_freqs *freqs)
-{
-
-       /*
-        * Catch double invocations of _begin() which lead to self-deadlock.
-        * ASYNC_NOTIFICATION drivers are left out because the cpufreq core
-        * doesn't invoke _begin() on their behalf, and hence the chances of
-        * double invocations are very low. Moreover, there are scenarios
-        * where these checks can emit false-positive warnings in these
-        * drivers; so we avoid that by skipping them altogether.
-        */
-       WARN_ON(!(cpufreq_driver->flags & CPUFREQ_ASYNC_NOTIFICATION)
-                               && current == policy->transition_task);
-
-wait:
-       wait_event(policy->transition_wait, !policy->transition_ongoing);
-
-       spin_lock(&policy->transition_lock);
-
-       if (unlikely(policy->transition_ongoing)) {
-               spin_unlock(&policy->transition_lock);
-               goto wait;
-       }
-
-       policy->transition_ongoing = true;
-       policy->transition_task = current;
-
-       spin_unlock(&policy->transition_lock);
-
-       cpufreq_notify_transition(policy, freqs, CPUFREQ_PRECHANGE);
-}
-EXPORT_SYMBOL_GPL(cpufreq_freq_transition_begin);
-
-void cpufreq_freq_transition_end(struct cpufreq_policy *policy,
-               struct cpufreq_freqs *freqs, int transition_failed)
-{
-       if (unlikely(WARN_ON(!policy->transition_ongoing)))
-               return;
-
-       cpufreq_notify_post_transition(policy, freqs, transition_failed);
-
-       policy->transition_ongoing = false;
-       policy->transition_task = NULL;
-
-       wake_up(&policy->transition_wait);
-}
-EXPORT_SYMBOL_GPL(cpufreq_freq_transition_end);
-
-/*
- * Fast frequency switching status count.  Positive means "enabled", negative
- * means "disabled" and 0 means "not decided yet".
- */
-static int cpufreq_fast_switch_count;
-static DEFINE_MUTEX(cpufreq_fast_switch_lock);
-
-static void cpufreq_list_transition_notifiers(void)
-{
-       struct notifier_block *nb;
-
-       pr_info("Registered transition notifiers:\n");
-
-       mutex_lock(&cpufreq_transition_notifier_list.mutex);
-
-       for (nb = cpufreq_transition_notifier_list.head; nb; nb = nb->next)
-               pr_info("%pF\n", nb->notifier_call);
-
-       mutex_unlock(&cpufreq_transition_notifier_list.mutex);
-}
-
-/**
- * cpufreq_enable_fast_switch - Enable fast frequency switching for policy.
- * @policy: cpufreq policy to enable fast frequency switching for.
- *
- * Try to enable fast frequency switching for @policy.
- *
- * The attempt will fail if there is at least one transition notifier 
registered
- * at this point, as fast frequency switching is quite fundamentally at odds
- * with transition notifiers.  Thus if successful, it will make registration of
- * transition notifiers fail going forward.
- */
-void cpufreq_enable_fast_switch(struct cpufreq_policy *policy)
-{
-       lockdep_assert_held(&policy->rwsem);
-
-       if (!policy->fast_switch_possible)
-               return;
-
-       mutex_lock(&cpufreq_fast_switch_lock);
-       if (cpufreq_fast_switch_count >= 0) {
-               cpufreq_fast_switch_count++;
-               policy->fast_switch_enabled = true;
-       } else {
-               pr_warn("CPU%u: Fast frequency switching not enabled\n",
-                       policy->cpu);
-               cpufreq_list_transition_notifiers();
-       }
-       mutex_unlock(&cpufreq_fast_switch_lock);
-}
-EXPORT_SYMBOL_GPL(cpufreq_enable_fast_switch);
-
-/**
- * cpufreq_disable_fast_switch - Disable fast frequency switching for policy.
- * @policy: cpufreq policy to disable fast frequency switching for.
- */
-void cpufreq_disable_fast_switch(struct cpufreq_policy *policy)
-{
-       mutex_lock(&cpufreq_fast_switch_lock);
-       if (policy->fast_switch_enabled) {
-               policy->fast_switch_enabled = false;
-               if (!WARN_ON(cpufreq_fast_switch_count <= 0))
-                       cpufreq_fast_switch_count--;
-       }
-       mutex_unlock(&cpufreq_fast_switch_lock);
-}
-EXPORT_SYMBOL_GPL(cpufreq_disable_fast_switch);
-
-/**
- * cpufreq_driver_resolve_freq - Map a target frequency to a driver-supported
- * one.
- * @target_freq: target frequency to resolve.
- *
- * The target to driver frequency mapping is cached in the policy.
- *
- * Return: Lowest driver-supported frequency greater than or equal to the
- * given target_freq, subject to policy (min/max) and driver limitations.
- */
-unsigned int cpufreq_driver_resolve_freq(struct cpufreq_policy *policy,
-                                        unsigned int target_freq)
-{
-       target_freq = clamp_val(target_freq, policy->min, policy->max);
-       policy->cached_target_freq = target_freq;
-
-       if (cpufreq_driver->target_index) {
-               int idx;
-
-               idx = cpufreq_frequency_table_target(policy, target_freq,
-                                                    CPUFREQ_RELATION_L);
-               policy->cached_resolved_idx = idx;
-               return policy->freq_table[idx].frequency;
-       }
-
-       if (cpufreq_driver->resolve_freq)
-               return cpufreq_driver->resolve_freq(policy, target_freq);
-
-       return target_freq;
-}
-EXPORT_SYMBOL_GPL(cpufreq_driver_resolve_freq);
-
-unsigned int cpufreq_policy_transition_delay_us(struct cpufreq_policy *policy)
-{
-       unsigned int latency;
-
-       if (policy->transition_delay_us)
-               return policy->transition_delay_us;
-
-       latency = policy->cpuinfo.transition_latency / NSEC_PER_USEC;
-       if (latency) {
-               /*
-                * For platforms that can change the frequency very fast (< 10
-                * us), the above formula gives a decent transition delay. But
-                * for platforms where transition_latency is in milliseconds, it
-                * ends up giving unrealistic values.
-                *
-                * Cap the default transition delay to 10 ms, which seems to be
-                * a reasonable amount of time after which we should reevaluate
-                * the frequency.
-                */
-               return min(latency * LATENCY_MULTIPLIER, (unsigned int)10000);
-       }
-
-       return LATENCY_MULTIPLIER;
-}
-EXPORT_SYMBOL_GPL(cpufreq_policy_transition_delay_us);
-
-/*********************************************************************
- *                          SYSFS INTERFACE                          *
- *********************************************************************/
-static ssize_t show_boost(struct kobject *kobj,
-                                struct attribute *attr, char *buf)
-{
-       return sprintf(buf, "%d\n", cpufreq_driver->boost_enabled);
-}
-
-static ssize_t store_boost(struct kobject *kobj, struct attribute *attr,
-                                 const char *buf, size_t count)
-{
-       int ret, enable;
-
-       ret = sscanf(buf, "%d", &enable);
-       if (ret != 1 || enable < 0 || enable > 1)
-               return -EINVAL;
-
-       if (cpufreq_boost_trigger_state(enable)) {
-               pr_err("%s: Cannot %s BOOST!\n",
-                      __func__, enable ? "enable" : "disable");
-               return -EINVAL;
-       }
-
-       pr_debug("%s: cpufreq BOOST %s\n",
-                __func__, enable ? "enabled" : "disabled");
-
-       return count;
-}
-define_one_global_rw(boost);
-
-static struct cpufreq_governor *find_governor(const char *str_governor)
-{
-       struct cpufreq_governor *t;
-
-       for_each_governor(t)
-               if (!strncasecmp(str_governor, t->name, CPUFREQ_NAME_LEN))
-                       return t;
-
-       return NULL;
-}
-
-/**
- * cpufreq_parse_governor - parse a governor string
- */
-static int cpufreq_parse_governor(char *str_governor,
-                                 struct cpufreq_policy *policy)
-{
-       if (cpufreq_driver->setpolicy) {
-               if (!strncasecmp(str_governor, "performance", 
CPUFREQ_NAME_LEN)) {
-                       policy->policy = CPUFREQ_POLICY_PERFORMANCE;
-                       return 0;
-               }
-
-               if (!strncasecmp(str_governor, "powersave", CPUFREQ_NAME_LEN)) {
-                       policy->policy = CPUFREQ_POLICY_POWERSAVE;
-                       return 0;
-               }
-       } else {
-               struct cpufreq_governor *t;
-
-               mutex_lock(&cpufreq_governor_mutex);
-
-               t = find_governor(str_governor);
-               if (!t) {
-                       int ret;
-
-                       mutex_unlock(&cpufreq_governor_mutex);
-
-                       ret = request_module("cpufreq_%s", str_governor);
-                       if (ret)
-                               return -EINVAL;
-
-                       mutex_lock(&cpufreq_governor_mutex);
-
-                       t = find_governor(str_governor);
-               }
-               if (t && !try_module_get(t->owner))
-                       t = NULL;
-
-               mutex_unlock(&cpufreq_governor_mutex);
-
-               if (t) {
-                       policy->governor = t;
-                       return 0;
-               }
-       }
-
-       return -EINVAL;
-}
-
-/**
- * cpufreq_per_cpu_attr_read() / show_##file_name() -
- * print out cpufreq information
- *
- * Write out information from cpufreq_driver->policy[cpu]; object must be
- * "unsigned int".
- */
-
-#define show_one(file_name, object)                    \
-static ssize_t show_##file_name                                \
-(struct cpufreq_policy *policy, char *buf)             \
-{                                                      \
-       return sprintf(buf, "%u\n", policy->object);    \
-}
-
-show_one(cpuinfo_min_freq, cpuinfo.min_freq);
-show_one(cpuinfo_max_freq, cpuinfo.max_freq);
-show_one(cpuinfo_transition_latency, cpuinfo.transition_latency);
-show_one(scaling_min_freq, min);
-show_one(scaling_max_freq, max);
-
-__weak unsigned int arch_freq_get_on_cpu(int cpu)
-{
-       return 0;
-}
-
-static ssize_t show_scaling_cur_freq(struct cpufreq_policy *policy, char *buf)
-{
-       ssize_t ret;
-       unsigned int freq;
-
-       freq = arch_freq_get_on_cpu(policy->cpu);
-       if (freq)
-               ret = sprintf(buf, "%u\n", freq);
-       else if (cpufreq_driver && cpufreq_driver->setpolicy &&
-                       cpufreq_driver->get)
-               ret = sprintf(buf, "%u\n", cpufreq_driver->get(policy->cpu));
-       else
-               ret = sprintf(buf, "%u\n", policy->cur);
-       return ret;
-}
-
-static int cpufreq_set_policy(struct cpufreq_policy *policy,
-                               struct cpufreq_policy *new_policy);
-
-/**
- * cpufreq_per_cpu_attr_write() / store_##file_name() - sysfs write access
- */
-#define store_one(file_name, object)                   \
-static ssize_t store_##file_name                                       \
-(struct cpufreq_policy *policy, const char *buf, size_t count)         \
-{                                                                      \
-       int ret, temp;                                                  \
-       struct cpufreq_policy new_policy;                               \
-                                                                       \
-       memcpy(&new_policy, policy, sizeof(*policy));                   \
-                                                                       \
-       ret = sscanf(buf, "%u", &new_policy.object);                    \
-       if (ret != 1)                                                   \
-               return -EINVAL;                                         \
-                                                                       \
-       temp = new_policy.object;                                       \
-       ret = cpufreq_set_policy(policy, &new_policy);          \
-       if (!ret)                                                       \
-               policy->user_policy.object = temp;                      \
-                                                                       \
-       return ret ? ret : count;                                       \
-}
-
-store_one(scaling_min_freq, min);
-store_one(scaling_max_freq, max);
-
-/**
- * show_cpuinfo_cur_freq - current CPU frequency as detected by hardware
- */
-static ssize_t show_cpuinfo_cur_freq(struct cpufreq_policy *policy,
-                                       char *buf)
-{
-       unsigned int cur_freq = __cpufreq_get(policy);
-
-       if (cur_freq)
-               return sprintf(buf, "%u\n", cur_freq);
-
-       return sprintf(buf, "<unknown>\n");
-}
-
-/**
- * show_scaling_governor - show the current policy for the specified CPU
- */
-static ssize_t show_scaling_governor(struct cpufreq_policy *policy, char *buf)
-{
-       if (policy->policy == CPUFREQ_POLICY_POWERSAVE)
-               return sprintf(buf, "powersave\n");
-       else if (policy->policy == CPUFREQ_POLICY_PERFORMANCE)
-               return sprintf(buf, "performance\n");
-       else if (policy->governor)
-               return scnprintf(buf, CPUFREQ_NAME_PLEN, "%s\n",
-                               policy->governor->name);
-       return -EINVAL;
-}
-
-/**
- * store_scaling_governor - store policy for the specified CPU
- */
-static ssize_t store_scaling_governor(struct cpufreq_policy *policy,
-                                       const char *buf, size_t count)
-{
-       int ret;
-       char    str_governor[16];
-       struct cpufreq_policy new_policy;
-
-       memcpy(&new_policy, policy, sizeof(*policy));
-
-       ret = sscanf(buf, "%15s", str_governor);
-       if (ret != 1)
-               return -EINVAL;
-
-       if (cpufreq_parse_governor(str_governor, &new_policy))
-               return -EINVAL;
-
-       ret = cpufreq_set_policy(policy, &new_policy);
-
-       if (new_policy.governor)
-               module_put(new_policy.governor->owner);
-
-       return ret ? ret : count;
-}
-
-/**
- * show_scaling_driver - show the cpufreq driver currently loaded
- */
-static ssize_t show_scaling_driver(struct cpufreq_policy *policy, char *buf)
-{
-       return scnprintf(buf, CPUFREQ_NAME_PLEN, "%s\n", cpufreq_driver->name);
-}
-
-/**
- * show_scaling_available_governors - show the available CPUfreq governors
- */
-static ssize_t show_scaling_available_governors(struct cpufreq_policy *policy,
-                                               char *buf)
-{
-       ssize_t i = 0;
-       struct cpufreq_governor *t;
-
-       if (!has_target()) {
-               i += sprintf(buf, "performance powersave");
-               goto out;
-       }
-
-       for_each_governor(t) {
-               if (i >= (ssize_t) ((PAGE_SIZE / sizeof(char))
-                   - (CPUFREQ_NAME_LEN + 2)))
-                       goto out;
-               i += scnprintf(&buf[i], CPUFREQ_NAME_PLEN, "%s ", t->name);
-       }
-out:
-       i += sprintf(&buf[i], "\n");
-       return i;
-}
-
-ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf)
-{
-       ssize_t i = 0;
-       unsigned int cpu;
-
-       for_each_cpu(cpu, mask) {
-               if (i)
-                       i += scnprintf(&buf[i], (PAGE_SIZE - i - 2), " ");
-               i += scnprintf(&buf[i], (PAGE_SIZE - i - 2), "%u", cpu);
-               if (i >= (PAGE_SIZE - 5))
-                       break;
-       }
-       i += sprintf(&buf[i], "\n");
-       return i;
-}
-EXPORT_SYMBOL_GPL(cpufreq_show_cpus);
-
-/**
- * show_related_cpus - show the CPUs affected by each transition even if
- * hw coordination is in use
- */
-static ssize_t show_related_cpus(struct cpufreq_policy *policy, char *buf)
-{
-       return cpufreq_show_cpus(policy->related_cpus, buf);
-}
-
-/**
- * show_affected_cpus - show the CPUs affected by each transition
- */
-static ssize_t show_affected_cpus(struct cpufreq_policy *policy, char *buf)
-{
-       return cpufreq_show_cpus(policy->cpus, buf);
-}
-
-static ssize_t store_scaling_setspeed(struct cpufreq_policy *policy,
-                                       const char *buf, size_t count)
-{
-       unsigned int freq = 0;
-       unsigned int ret;
-
-       if (!policy->governor || !policy->governor->store_setspeed)
-               return -EINVAL;
-
-       ret = sscanf(buf, "%u", &freq);
-       if (ret != 1)
-               return -EINVAL;
-
-       policy->governor->store_setspeed(policy, freq);
-
-       return count;
-}
-
-static ssize_t show_scaling_setspeed(struct cpufreq_policy *policy, char *buf)
-{
-       if (!policy->governor || !policy->governor->show_setspeed)
-               return sprintf(buf, "<unsupported>\n");
-
-       return policy->governor->show_setspeed(policy, buf);
-}
-
-/**
- * show_bios_limit - show the current cpufreq HW/BIOS limitation
- */
-static ssize_t show_bios_limit(struct cpufreq_policy *policy, char *buf)
-{
-       unsigned int limit;
-       int ret;
-       if (cpufreq_driver->bios_limit) {
-               ret = cpufreq_driver->bios_limit(policy->cpu, &limit);
-               if (!ret)
-                       return sprintf(buf, "%u\n", limit);
-       }
-       return sprintf(buf, "%u\n", policy->cpuinfo.max_freq);
-}
-
-cpufreq_freq_attr_ro_perm(cpuinfo_cur_freq, 0400);
-cpufreq_freq_attr_ro(cpuinfo_min_freq);
-cpufreq_freq_attr_ro(cpuinfo_max_freq);
-cpufreq_freq_attr_ro(cpuinfo_transition_latency);
-cpufreq_freq_attr_ro(scaling_available_governors);
-cpufreq_freq_attr_ro(scaling_driver);
-cpufreq_freq_attr_ro(scaling_cur_freq);
-cpufreq_freq_attr_ro(bios_limit);
-cpufreq_freq_attr_ro(related_cpus);
-cpufreq_freq_attr_ro(affected_cpus);
-cpufreq_freq_attr_rw(scaling_min_freq);
-cpufreq_freq_attr_rw(scaling_max_freq);
-cpufreq_freq_attr_rw(scaling_governor);
-cpufreq_freq_attr_rw(scaling_setspeed);
-
-static struct attribute *default_attrs[] = {
-       &cpuinfo_min_freq.attr,
-       &cpuinfo_max_freq.attr,
-       &cpuinfo_transition_latency.attr,
-       &scaling_min_freq.attr,
-       &scaling_max_freq.attr,
-       &affected_cpus.attr,
-       &related_cpus.attr,
-       &scaling_governor.attr,
-       &scaling_driver.attr,
-       &scaling_available_governors.attr,
-       &scaling_setspeed.attr,
-       NULL
-};
-
-#define to_policy(k) container_of(k, struct cpufreq_policy, kobj)
-#define to_attr(a) container_of(a, struct freq_attr, attr)
-
-static ssize_t show(struct kobject *kobj, struct attribute *attr, char *buf)
-{
-       struct cpufreq_policy *policy = to_policy(kobj);
-       struct freq_attr *fattr = to_attr(attr);
-       ssize_t ret;
-
-       down_read(&policy->rwsem);
-       ret = fattr->show(policy, buf);
-       up_read(&policy->rwsem);
-
-       return ret;
-}
-
-static ssize_t store(struct kobject *kobj, struct attribute *attr,
-                    const char *buf, size_t count)
-{
-       struct cpufreq_policy *policy = to_policy(kobj);
-       struct freq_attr *fattr = to_attr(attr);
-       ssize_t ret = -EINVAL;
-
-       cpus_read_lock();
-
-       if (cpu_online(policy->cpu)) {
-               down_write(&policy->rwsem);
-               ret = fattr->store(policy, buf, count);
-               up_write(&policy->rwsem);
-       }
-
-       cpus_read_unlock();
-
-       return ret;
-}
-
-static void cpufreq_sysfs_release(struct kobject *kobj)
-{
-       struct cpufreq_policy *policy = to_policy(kobj);
-       pr_debug("last reference is dropped\n");
-       complete(&policy->kobj_unregister);
-}
-
-static const struct sysfs_ops sysfs_ops = {
-       .show   = show,
-       .store  = store,
-};
-
-static struct kobj_type ktype_cpufreq = {
-       .sysfs_ops      = &sysfs_ops,
-       .default_attrs  = default_attrs,
-       .release        = cpufreq_sysfs_release,
-};
-
-static void add_cpu_dev_symlink(struct cpufreq_policy *policy, unsigned int 
cpu)
-{
-       struct device *dev = get_cpu_device(cpu);
-
-       if (!dev)
-               return;
-
-       if (cpumask_test_and_set_cpu(cpu, policy->real_cpus))
-               return;
-
-       dev_dbg(dev, "%s: Adding symlink\n", __func__);
-       if (sysfs_create_link(&dev->kobj, &policy->kobj, "cpufreq"))
-               dev_err(dev, "cpufreq symlink creation failed\n");
-}
-
-static void remove_cpu_dev_symlink(struct cpufreq_policy *policy,
-                                  struct device *dev)
-{
-       dev_dbg(dev, "%s: Removing symlink\n", __func__);
-       sysfs_remove_link(&dev->kobj, "cpufreq");
-}
-
-static int cpufreq_add_dev_interface(struct cpufreq_policy *policy)
-{
-       struct freq_attr **drv_attr;
-       int ret = 0;
-
-       /* set up files for this cpu device */
-       drv_attr = cpufreq_driver->attr;
-       while (drv_attr && *drv_attr) {
-               ret = sysfs_create_file(&policy->kobj, &((*drv_attr)->attr));
-               if (ret)
-                       return ret;
-               drv_attr++;
-       }
-       if (cpufreq_driver->get) {
-               ret = sysfs_create_file(&policy->kobj, &cpuinfo_cur_freq.attr);
-               if (ret)
-                       return ret;
-       }
-
-       ret = sysfs_create_file(&policy->kobj, &scaling_cur_freq.attr);
-       if (ret)
-               return ret;
-
-       if (cpufreq_driver->bios_limit) {
-               ret = sysfs_create_file(&policy->kobj, &bios_limit.attr);
-               if (ret)
-                       return ret;
-       }
-
-       return 0;
-}
-
-__weak struct cpufreq_governor *cpufreq_default_governor(void)
-{
-       return NULL;
-}
-
-static int cpufreq_init_policy(struct cpufreq_policy *policy)
-{
-       struct cpufreq_governor *gov = NULL;
-       struct cpufreq_policy new_policy;
-
-       memcpy(&new_policy, policy, sizeof(*policy));
-
-       /* Update governor of new_policy to the governor used before hotplug */
-       gov = find_governor(policy->last_governor);
-       if (gov) {
-               pr_debug("Restoring governor %s for cpu %d\n",
-                               policy->governor->name, policy->cpu);
-       } else {
-               gov = cpufreq_default_governor();
-               if (!gov)
-                       return -ENODATA;
-       }
-
-       new_policy.governor = gov;
-
-       /* Use the default policy if there is no last_policy. */
-       if (cpufreq_driver->setpolicy) {
-               if (policy->last_policy)
-                       new_policy.policy = policy->last_policy;
-               else
-                       cpufreq_parse_governor(gov->name, &new_policy);
-       }
-       /* set default policy */
-       return cpufreq_set_policy(policy, &new_policy);
-}
-
-static int cpufreq_add_policy_cpu(struct cpufreq_policy *policy, unsigned int 
cpu)
-{
-       int ret = 0;
-
-       /* Has this CPU been taken care of already? */
-       if (cpumask_test_cpu(cpu, policy->cpus))
-               return 0;
-
-       down_write(&policy->rwsem);
-       if (has_target())
-               cpufreq_stop_governor(policy);
-
-       cpumask_set_cpu(cpu, policy->cpus);
-
-       if (has_target()) {
-               ret = cpufreq_start_governor(policy);
-               if (ret)
-                       pr_err("%s: Failed to start governor\n", __func__);
-       }
-       up_write(&policy->rwsem);
-       return ret;
-}
-
-static void handle_update(struct work_struct *work)
-{
-       struct cpufreq_policy *policy =
-               container_of(work, struct cpufreq_policy, update);
-       unsigned int cpu = policy->cpu;
-       pr_debug("handle_update for cpu %u called\n", cpu);
-       cpufreq_update_policy(cpu);
-}
-
-static struct cpufreq_policy *cpufreq_policy_alloc(unsigned int cpu)
-{
-       struct cpufreq_policy *policy;
-       int ret;
-
-       policy = kzalloc(sizeof(*policy), GFP_KERNEL);
-       if (!policy)
-               return NULL;
-
-       if (!alloc_cpumask_var(&policy->cpus, GFP_KERNEL))
-               goto err_free_policy;
-
-       if (!zalloc_cpumask_var(&policy->related_cpus, GFP_KERNEL))
-               goto err_free_cpumask;
-
-       if (!zalloc_cpumask_var(&policy->real_cpus, GFP_KERNEL))
-               goto err_free_rcpumask;
-
-       ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq,
-                                  cpufreq_global_kobject, "policy%u", cpu);
-       if (ret) {
-               pr_err("%s: failed to init policy->kobj: %d\n", __func__, ret);
-               goto err_free_real_cpus;
-       }
-
-       INIT_LIST_HEAD(&policy->policy_list);
-       init_rwsem(&policy->rwsem);
-       spin_lock_init(&policy->transition_lock);
-       init_waitqueue_head(&policy->transition_wait);
-       init_completion(&policy->kobj_unregister);
-       INIT_WORK(&policy->update, handle_update);
-
-       policy->cpu = cpu;
-       return policy;
-
-err_free_real_cpus:
-       free_cpumask_var(policy->real_cpus);
-err_free_rcpumask:
-       free_cpumask_var(policy->related_cpus);
-err_free_cpumask:
-       free_cpumask_var(policy->cpus);
-err_free_policy:
-       kfree(policy);
-
-       return NULL;
-}
-
-static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy)
-{
-       struct kobject *kobj;
-       struct completion *cmp;
-
-       down_write(&policy->rwsem);
-       cpufreq_stats_free_table(policy);
-       kobj = &policy->kobj;
-       cmp = &policy->kobj_unregister;
-       up_write(&policy->rwsem);
-       kobject_put(kobj);
-
-       /*
-        * We need to make sure that the underlying kobj is
-        * actually not referenced anymore by anybody before we
-        * proceed with unloading.
-        */
-       pr_debug("waiting for dropping of refcount\n");
-       wait_for_completion(cmp);
-       pr_debug("wait complete\n");
-}
-
-static void cpufreq_policy_free(struct cpufreq_policy *policy)
-{
-       unsigned long flags;
-       int cpu;
-
-       /* Remove policy from list */
-       write_lock_irqsave(&cpufreq_driver_lock, flags);
-       list_del(&policy->policy_list);
-
-       for_each_cpu(cpu, policy->related_cpus)
-               per_cpu(cpufreq_cpu_data, cpu) = NULL;
-       write_unlock_irqrestore(&cpufreq_driver_lock, flags);
-
-       cpufreq_policy_put_kobj(policy);
-       free_cpumask_var(policy->real_cpus);
-       free_cpumask_var(policy->related_cpus);
-       free_cpumask_var(policy->cpus);
-       kfree(policy);
-}
-
-static int cpufreq_online(unsigned int cpu)
-{
-       struct cpufreq_policy *policy;
-       bool new_policy;
-       unsigned long flags;
-       unsigned int j;
-       int ret;
-
-       pr_debug("%s: bringing CPU%u online\n", __func__, cpu);
-
-       /* Check if this CPU already has a policy to manage it */
-       policy = per_cpu(cpufreq_cpu_data, cpu);
-       if (policy) {
-               WARN_ON(!cpumask_test_cpu(cpu, policy->related_cpus));
-               if (!policy_is_inactive(policy))
-                       return cpufreq_add_policy_cpu(policy, cpu);
-
-               /* This is the only online CPU for the policy.  Start over. */
-               new_policy = false;
-               down_write(&policy->rwsem);
-               policy->cpu = cpu;
-               policy->governor = NULL;
-               up_write(&policy->rwsem);
-       } else {
-               new_policy = true;
-               policy = cpufreq_policy_alloc(cpu);
-               if (!policy)
-                       return -ENOMEM;
-       }
-
-       cpumask_copy(policy->cpus, cpumask_of(cpu));
-
-       /* call driver. From then on the cpufreq must be able
-        * to accept all calls to ->verify and ->setpolicy for this CPU
-        */
-       ret = cpufreq_driver->init(policy);
-       if (ret) {
-               pr_debug("initialization failed\n");
-               goto out_free_policy;
-       }
-
-       down_write(&policy->rwsem);
-
-       if (new_policy) {
-               /* related_cpus should at least include policy->cpus. */
-               cpumask_copy(policy->related_cpus, policy->cpus);
-       }
-
-       /*
-        * affected cpus must always be the one, which are online. We aren't
-        * managing offline cpus here.
-        */
-       cpumask_and(policy->cpus, policy->cpus, cpu_online_mask);
-
-       if (new_policy) {
-               policy->user_policy.min = policy->min;
-               policy->user_policy.max = policy->max;
-
-               for_each_cpu(j, policy->related_cpus) {
-                       per_cpu(cpufreq_cpu_data, j) = policy;
-                       add_cpu_dev_symlink(policy, j);
-               }
-       } else {
-               policy->min = policy->user_policy.min;
-               policy->max = policy->user_policy.max;
-       }
-
-       if (cpufreq_driver->get && !cpufreq_driver->setpolicy) {
-               policy->cur = cpufreq_driver->get(policy->cpu);
-               if (!policy->cur) {
-                       pr_err("%s: ->get() failed\n", __func__);
-                       goto out_exit_policy;
-               }
-       }
-
-       /*
-        * Sometimes boot loaders set CPU frequency to a value outside of
-        * frequency table present with cpufreq core. In such cases CPU might be
-        * unstable if it has to run on that frequency for long duration of time
-        * and so its better to set it to a frequency which is specified in
-        * freq-table. This also makes cpufreq stats inconsistent as
-        * cpufreq-stats would fail to register because current frequency of CPU
-        * isn't found in freq-table.
-        *
-        * Because we don't want this change to effect boot process badly, we go
-        * for the next freq which is >= policy->cur ('cur' must be set by now,
-        * otherwise we will end up setting freq to lowest of the table as 'cur'
-        * is initialized to zero).
-        *
-        * We are passing target-freq as "policy->cur - 1" otherwise
-        * __cpufreq_driver_target() would simply fail, as policy->cur will be
-        * equal to target-freq.
-        */
-       if ((cpufreq_driver->flags & CPUFREQ_NEED_INITIAL_FREQ_CHECK)
-           && has_target()) {
-               /* Are we running at unknown frequency ? */
-               ret = cpufreq_frequency_table_get_index(policy, policy->cur);
-               if (ret == -EINVAL) {
-                       /* Warn user and fix it */
-                       pr_warn("%s: CPU%d: Running at unlisted freq: %u KHz\n",
-                               __func__, policy->cpu, policy->cur);
-                       ret = __cpufreq_driver_target(policy, policy->cur - 1,
-                               CPUFREQ_RELATION_L);
-
-                       /*
-                        * Reaching here after boot in a few seconds may not
-                        * mean that system will remain stable at "unknown"
-                        * frequency for longer duration. Hence, a BUG_ON().
-                        */
-                       BUG_ON(ret);
-                       pr_warn("%s: CPU%d: Unlisted initial frequency changed 
to: %u KHz\n",
-                               __func__, policy->cpu, policy->cur);
-               }
-       }
-
-       if (new_policy) {
-               ret = cpufreq_add_dev_interface(policy);
-               if (ret)
-                       goto out_exit_policy;
-
-               cpufreq_stats_create_table(policy);
-
-               write_lock_irqsave(&cpufreq_driver_lock, flags);
-               list_add(&policy->policy_list, &cpufreq_policy_list);
-               write_unlock_irqrestore(&cpufreq_driver_lock, flags);
-       }
-
-       ret = cpufreq_init_policy(policy);
-       if (ret) {
-               pr_err("%s: Failed to initialize policy for cpu: %d (%d)\n",
-                      __func__, cpu, ret);
-               /* cpufreq_policy_free() will notify based on this */
-               new_policy = false;
-               goto out_exit_policy;
-       }
-
-       up_write(&policy->rwsem);
-
-       kobject_uevent(&policy->kobj, KOBJ_ADD);
-
-       /* Callback for handling stuff after policy is ready */
-       if (cpufreq_driver->ready)
-               cpufreq_driver->ready(policy);
-
-       pr_debug("initialization complete\n");
-
-       return 0;
-
-out_exit_policy:
-       up_write(&policy->rwsem);
-
-       if (cpufreq_driver->exit)
-               cpufreq_driver->exit(policy);
-
-       for_each_cpu(j, policy->real_cpus)
-               remove_cpu_dev_symlink(policy, get_cpu_device(j));
-
-out_free_policy:
-       cpufreq_policy_free(policy);
-       return ret;
-}
-
-/**
- * cpufreq_add_dev - the cpufreq interface for a CPU device.
- * @dev: CPU device.
- * @sif: Subsystem interface structure pointer (not used)
- */
-static int cpufreq_add_dev(struct device *dev, struct subsys_interface *sif)
-{
-       struct cpufreq_policy *policy;
-       unsigned cpu = dev->id;
-       int ret;
-
-       dev_dbg(dev, "%s: adding CPU%u\n", __func__, cpu);
-
-       if (cpu_online(cpu)) {
-               ret = cpufreq_online(cpu);
-               if (ret)
-                       return ret;
-       }
-
-       /* Create sysfs link on CPU registration */
-       policy = per_cpu(cpufreq_cpu_data, cpu);
-       if (policy)
-               add_cpu_dev_symlink(policy, cpu);
-
-       return 0;
-}
-
-static int cpufreq_offline(unsigned int cpu)
-{
-       struct cpufreq_policy *policy;
-       int ret;
-
-       pr_debug("%s: unregistering CPU %u\n", __func__, cpu);
-
-       policy = cpufreq_cpu_get_raw(cpu);
-       if (!policy) {
-               pr_debug("%s: No cpu_data found\n", __func__);
-               return 0;
-       }
-
-       down_write(&policy->rwsem);
-       if (has_target())
-               cpufreq_stop_governor(policy);
-
-       cpumask_clear_cpu(cpu, policy->cpus);
-
-       if (policy_is_inactive(policy)) {
-               if (has_target())
-                       strncpy(policy->last_governor, policy->governor->name,
-                               CPUFREQ_NAME_LEN);
-               else
-                       policy->last_policy = policy->policy;
-       } else if (cpu == policy->cpu) {
-               /* Nominate new CPU */
-               policy->cpu = cpumask_any(policy->cpus);
-       }
-
-       /* Start governor again for active policy */
-       if (!policy_is_inactive(policy)) {
-               if (has_target()) {
-                       ret = cpufreq_start_governor(policy);
-                       if (ret)
-                               pr_err("%s: Failed to start governor\n", 
__func__);
-               }
-
-               goto unlock;
-       }
-
-       if (cpufreq_driver->stop_cpu)
-               cpufreq_driver->stop_cpu(policy);
-
-       if (has_target())
-               cpufreq_exit_governor(policy);
-
-       /*
-        * Perform the ->exit() even during light-weight tear-down,
-        * since this is a core component, and is essential for the
-        * subsequent light-weight ->init() to succeed.
-        */
-       if (cpufreq_driver->exit) {
-               cpufreq_driver->exit(policy);
-               policy->freq_table = NULL;
-       }
-
-unlock:
-       up_write(&policy->rwsem);
-       return 0;
-}
-
-/**
- * cpufreq_remove_dev - remove a CPU device
- *
- * Removes the cpufreq interface for a CPU device.
- */
-static void cpufreq_remove_dev(struct device *dev, struct subsys_interface 
*sif)
-{
-       unsigned int cpu = dev->id;
-       struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
-
-       if (!policy)
-               return;
-
-       if (cpu_online(cpu))
-               cpufreq_offline(cpu);
-
-       cpumask_clear_cpu(cpu, policy->real_cpus);
-       remove_cpu_dev_symlink(policy, dev);
-
-       if (cpumask_empty(policy->real_cpus))
-               cpufreq_policy_free(policy);
-}
-
-/**
- *     cpufreq_out_of_sync - If actual and saved CPU frequency differs, we're
- *     in deep trouble.
- *     @policy: policy managing CPUs
- *     @new_freq: CPU frequency the CPU actually runs at
- *
- *     We adjust to current frequency first, and need to clean up later.
- *     So either call to cpufreq_update_policy() or schedule handle_update()).
- */
-static void cpufreq_out_of_sync(struct cpufreq_policy *policy,
-                               unsigned int new_freq)
-{
-       struct cpufreq_freqs freqs;
-
-       pr_debug("Warning: CPU frequency out of sync: cpufreq and timing core 
thinks of %u, is %u kHz\n",
-                policy->cur, new_freq);
-
-       freqs.old = policy->cur;
-       freqs.new = new_freq;
-
-       cpufreq_freq_transition_begin(policy, &freqs);
-       cpufreq_freq_transition_end(policy, &freqs, 0);
-}
-
-/**
- * cpufreq_quick_get - get the CPU frequency (in kHz) from policy->cur
- * @cpu: CPU number
- *
- * This is the last known freq, without actually getting it from the driver.
- * Return value will be same as what is shown in scaling_cur_freq in sysfs.
- */
-unsigned int cpufreq_quick_get(unsigned int cpu)
-{
-       struct cpufreq_policy *policy;
-       unsigned int ret_freq = 0;
-       unsigned long flags;
-
-       read_lock_irqsave(&cpufreq_driver_lock, flags);
-
-       if (cpufreq_driver && cpufreq_driver->setpolicy && cpufreq_driver->get) 
{
-               ret_freq = cpufreq_driver->get(cpu);
-               read_unlock_irqrestore(&cpufreq_driver_lock, flags);
-               return ret_freq;
-       }
-
-       read_unlock_irqrestore(&cpufreq_driver_lock, flags);
-
-       policy = cpufreq_cpu_get(cpu);
-       if (policy) {
-               ret_freq = policy->cur;
-               cpufreq_cpu_put(policy);
-       }
-
-       return ret_freq;
-}
-EXPORT_SYMBOL(cpufreq_quick_get);
-
-/**
- * cpufreq_quick_get_max - get the max reported CPU frequency for this CPU
- * @cpu: CPU number
- *
- * Just return the max possible frequency for a given CPU.
- */
-unsigned int cpufreq_quick_get_max(unsigned int cpu)
-{
-       struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
-       unsigned int ret_freq = 0;
-
-       if (policy) {
-               ret_freq = policy->max;
-               cpufreq_cpu_put(policy);
-       }
-
-       return ret_freq;
-}
-EXPORT_SYMBOL(cpufreq_quick_get_max);
-
-static unsigned int __cpufreq_get(struct cpufreq_policy *policy)
-{
-       unsigned int ret_freq = 0;
-
-       if (!cpufreq_driver->get)
-               return ret_freq;
-
-       ret_freq = cpufreq_driver->get(policy->cpu);
-
-       /*
-        * Updating inactive policies is invalid, so avoid doing that.  Also
-        * if fast frequency switching is used with the given policy, the check
-        * against policy->cur is pointless, so skip it in that case too.
-        */
-       if (unlikely(policy_is_inactive(policy)) || policy->fast_switch_enabled)
-               return ret_freq;
-
-       if (ret_freq && policy->cur &&
-               !(cpufreq_driver->flags & CPUFREQ_CONST_LOOPS)) {
-               /* verify no discrepancy between actual and
-                                       saved value exists */
-               if (unlikely(ret_freq != policy->cur)) {
-                       cpufreq_out_of_sync(policy, ret_freq);
-                       schedule_work(&policy->update);
-               }
-       }
-
-       return ret_freq;
-}
-
-/**
- * cpufreq_get - get the current CPU frequency (in kHz)
- * @cpu: CPU number
- *
- * Get the CPU current (static) CPU frequency
- */
-unsigned int cpufreq_get(unsigned int cpu)
-{
-       struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
-       unsigned int ret_freq = 0;
-
-       if (policy) {
-               down_read(&policy->rwsem);
-
-               if (!policy_is_inactive(policy))
-                       ret_freq = __cpufreq_get(policy);
-
-               up_read(&policy->rwsem);
-
-               cpufreq_cpu_put(policy);
-       }
-
-       return ret_freq;
-}
-EXPORT_SYMBOL(cpufreq_get);
-
-static unsigned int cpufreq_update_current_freq(struct cpufreq_policy *policy)
-{
-       unsigned int new_freq;
-
-       new_freq = cpufreq_driver->get(policy->cpu);
-       if (!new_freq)
-               return 0;
-
-       if (!policy->cur) {
-               pr_debug("cpufreq: Driver did not initialize current freq\n");
-               policy->cur = new_freq;
-       } else if (policy->cur != new_freq && has_target()) {
-               cpufreq_out_of_sync(policy, new_freq);
-       }
-
-       return new_freq;
-}
-
-static struct subsys_interface cpufreq_interface = {
-       .name           = "cpufreq",
-       .subsys         = &cpu_subsys,
-       .add_dev        = cpufreq_add_dev,
-       .remove_dev     = cpufreq_remove_dev,
-};
-
-/*
- * In case platform wants some specific frequency to be configured
- * during suspend..
- */
-int cpufreq_generic_suspend(struct cpufreq_policy *policy)
-{
-       int ret;
-
-       if (!policy->suspend_freq) {
-               pr_debug("%s: suspend_freq not defined\n", __func__);
-               return 0;
-       }
-
-       pr_debug("%s: Setting suspend-freq: %u\n", __func__,
-                       policy->suspend_freq);
-
-       ret = __cpufreq_driver_target(policy, policy->suspend_freq,
-                       CPUFREQ_RELATION_H);
-       if (ret)
-               pr_err("%s: unable to set suspend-freq: %u. err: %d\n",
-                               __func__, policy->suspend_freq, ret);
-
-       return ret;
-}
-EXPORT_SYMBOL(cpufreq_generic_suspend);
-
-/**
- * cpufreq_suspend() - Suspend CPUFreq governors
- *
- * Called during system wide Suspend/Hibernate cycles for suspending governors
- * as some platforms can't change frequency after this point in suspend cycle.
- * Because some of the devices (like: i2c, regulators, etc) they use for
- * changing frequency are suspended quickly after this point.
- */
-void cpufreq_suspend(void)
-{
-       struct cpufreq_policy *policy;
-
-       if (!cpufreq_driver)
-               return;
-
-       if (!has_target() && !cpufreq_driver->suspend)
-               goto suspend;
-
-       pr_debug("%s: Suspending Governors\n", __func__);
-
-       for_each_active_policy(policy) {
-               if (has_target()) {
-                       down_write(&policy->rwsem);
-                       cpufreq_stop_governor(policy);
-                       up_write(&policy->rwsem);
-               }
-
-               if (cpufreq_driver->suspend && cpufreq_driver->suspend(policy))
-                       pr_err("%s: Failed to suspend driver: %p\n", __func__,
-                               policy);
-       }
-
-suspend:
-       cpufreq_suspended = true;
-}
-
-/**
- * cpufreq_resume() - Resume CPUFreq governors
- *
- * Called during system wide Suspend/Hibernate cycle for resuming governors 
that
- * are suspended with cpufreq_suspend().
- */
-void cpufreq_resume(void)
-{
-       struct cpufreq_policy *policy;
-       int ret;
-
-       if (!cpufreq_driver)
-               return;
-
-       if (unlikely(!cpufreq_suspended))
-               return;
-
-       cpufreq_suspended = false;
-
-       if (!has_target() && !cpufreq_driver->resume)
-               return;
-
-       pr_debug("%s: Resuming Governors\n", __func__);
-
-       for_each_active_policy(policy) {
-               if (cpufreq_driver->resume && cpufreq_driver->resume(policy)) {
-                       pr_err("%s: Failed to resume driver: %p\n", __func__,
-                               policy);
-               } else if (has_target()) {
-                       down_write(&policy->rwsem);
-                       ret = cpufreq_start_governor(policy);
-                       up_write(&policy->rwsem);
-
-                       if (ret)
-                               pr_err("%s: Failed to start governor for 
policy: %p\n",
-                                      __func__, policy);
-               }
-       }
-}
-
-/**
- *     cpufreq_get_current_driver - return current driver's name
- *
- *     Return the name string of the currently loaded cpufreq driver
- *     or NULL, if none.
- */
-const char *cpufreq_get_current_driver(void)
-{
-       if (cpufreq_driver)
-               return cpufreq_driver->name;
-
-       return NULL;
-}
-EXPORT_SYMBOL_GPL(cpufreq_get_current_driver);
-
-/**
- *     cpufreq_get_driver_data - return current driver data
- *
- *     Return the private data of the currently loaded cpufreq
- *     driver, or NULL if no cpufreq driver is loaded.
- */
-void *cpufreq_get_driver_data(void)
-{
-       if (cpufreq_driver)
-               return cpufreq_driver->driver_data;
-
-       return NULL;
-}
-EXPORT_SYMBOL_GPL(cpufreq_get_driver_data);
-
-/*********************************************************************
- *                     NOTIFIER LISTS INTERFACE                      *
- *********************************************************************/
-
-/**
- *     cpufreq_register_notifier - register a driver with cpufreq
- *     @nb: notifier function to register
- *      @list: CPUFREQ_TRANSITION_NOTIFIER or CPUFREQ_POLICY_NOTIFIER
- *
- *     Add a driver to one of two lists: either a list of drivers that
- *      are notified about clock rate changes (once before and once after
- *      the transition), or a list of drivers that are notified about
- *      changes in cpufreq policy.
- *
- *     This function may sleep, and has the same return conditions as
- *     blocking_notifier_chain_register.
- */
-int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list)
-{
-       int ret;
-
-       if (cpufreq_disabled())
-               return -EINVAL;
-
-       WARN_ON(!init_cpufreq_transition_notifier_list_called);
-
-       switch (list) {
-       case CPUFREQ_TRANSITION_NOTIFIER:
-               mutex_lock(&cpufreq_fast_switch_lock);
-
-               if (cpufreq_fast_switch_count > 0) {
-                       mutex_unlock(&cpufreq_fast_switch_lock);
-                       return -EBUSY;
-               }
-               ret = srcu_notifier_chain_register(
-                               &cpufreq_transition_notifier_list, nb);
-               if (!ret)
-                       cpufreq_fast_switch_count--;
-
-               mutex_unlock(&cpufreq_fast_switch_lock);
-               break;
-       case CPUFREQ_POLICY_NOTIFIER:
-               ret = blocking_notifier_chain_register(
-                               &cpufreq_policy_notifier_list, nb);
-               break;
-       default:
-               ret = -EINVAL;
-       }
-
-       return ret;
-}
-EXPORT_SYMBOL(cpufreq_register_notifier);
-
-/**
- *     cpufreq_unregister_notifier - unregister a driver with cpufreq
- *     @nb: notifier block to be unregistered
- *     @list: CPUFREQ_TRANSITION_NOTIFIER or CPUFREQ_POLICY_NOTIFIER
- *
- *     Remove a driver from the CPU frequency notifier list.
- *
- *     This function may sleep, and has the same return conditions as
- *     blocking_notifier_chain_unregister.
- */
-int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list)
-{
-       int ret;
-
-       if (cpufreq_disabled())
-               return -EINVAL;
-
-       switch (list) {
-       case CPUFREQ_TRANSITION_NOTIFIER:
-               mutex_lock(&cpufreq_fast_switch_lock);
-
-               ret = srcu_notifier_chain_unregister(
-                               &cpufreq_transition_notifier_list, nb);
-               if (!ret && !WARN_ON(cpufreq_fast_switch_count >= 0))
-                       cpufreq_fast_switch_count++;
-
-               mutex_unlock(&cpufreq_fast_switch_lock);
-               break;
-       case CPUFREQ_POLICY_NOTIFIER:
-               ret = blocking_notifier_chain_unregister(
-                               &cpufreq_policy_notifier_list, nb);
-               break;
-       default:
-               ret = -EINVAL;
-       }
-
-       return ret;
-}
-EXPORT_SYMBOL(cpufreq_unregister_notifier);
-
-
-/*********************************************************************
- *                              GOVERNORS                            *
- *********************************************************************/
-
-/**
- * cpufreq_driver_fast_switch - Carry out a fast CPU frequency switch.
- * @policy: cpufreq policy to switch the frequency for.
- * @target_freq: New frequency to set (may be approximate).
- *
- * Carry out a fast frequency switch without sleeping.
- *
- * The driver's ->fast_switch() callback invoked by this function must be
- * suitable for being called from within RCU-sched read-side critical sections
- * and it is expected to select the minimum available frequency greater than or
- * equal to @target_freq (CPUFREQ_RELATION_L).
- *
- * This function must not be called if policy->fast_switch_enabled is unset.
- *
- * Governors calling this function must guarantee that it will never be invoked
- * twice in parallel for the same policy and that it will never be called in
- * parallel with either ->target() or ->target_index() for the same policy.
- *
- * Returns the actual frequency set for the CPU.
- *
- * If 0 is returned by the driver's ->fast_switch() callback to indicate an
- * error condition, the hardware configuration must be preserved.
- */
-unsigned int cpufreq_driver_fast_switch(struct cpufreq_policy *policy,
-                                       unsigned int target_freq)
-{
-       target_freq = clamp_val(target_freq, policy->min, policy->max);
-
-       return cpufreq_driver->fast_switch(policy, target_freq);
-}
-EXPORT_SYMBOL_GPL(cpufreq_driver_fast_switch);
-
-/* Must set freqs->new to intermediate frequency */
-static int __target_intermediate(struct cpufreq_policy *policy,
-                                struct cpufreq_freqs *freqs, int index)
-{
-       int ret;
-
-       freqs->new = cpufreq_driver->get_intermediate(policy, index);
-
-       /* We don't need to switch to intermediate freq */
-       if (!freqs->new)
-               return 0;
-
-       pr_debug("%s: cpu: %d, switching to intermediate freq: oldfreq: %u, 
intermediate freq: %u\n",
-                __func__, policy->cpu, freqs->old, freqs->new);
-
-       cpufreq_freq_transition_begin(policy, freqs);
-       ret = cpufreq_driver->target_intermediate(policy, index);
-       cpufreq_freq_transition_end(policy, freqs, ret);
-
-       if (ret)
-               pr_err("%s: Failed to change to intermediate frequency: %d\n",
-                      __func__, ret);
-
-       return ret;
-}
-
-static int __target_index(struct cpufreq_policy *policy, int index)
-{
-       struct cpufreq_freqs freqs = {.old = policy->cur, .flags = 0};
-       unsigned int intermediate_freq = 0;
-       unsigned int newfreq = policy->freq_table[index].frequency;
-       int retval = -EINVAL;
-       bool notify;
-
-       if (newfreq == policy->cur)
-               return 0;
-
-       notify = !(cpufreq_driver->flags & CPUFREQ_ASYNC_NOTIFICATION);
-       if (notify) {
-               /* Handle switching to intermediate frequency */
-               if (cpufreq_driver->get_intermediate) {
-                       retval = __target_intermediate(policy, &freqs, index);
-                       if (retval)
-                               return retval;
-
-                       intermediate_freq = freqs.new;
-                       /* Set old freq to intermediate */
-                       if (intermediate_freq)
-                               freqs.old = freqs.new;
-               }
-
-               freqs.new = newfreq;
-               pr_debug("%s: cpu: %d, oldfreq: %u, new freq: %u\n",
-                        __func__, policy->cpu, freqs.old, freqs.new);
-
-               cpufreq_freq_transition_begin(policy, &freqs);
-       }
-
-       retval = cpufreq_driver->target_index(policy, index);
-       if (retval)
-               pr_err("%s: Failed to change cpu frequency: %d\n", __func__,
-                      retval);
-
-       if (notify) {
-               cpufreq_freq_transition_end(policy, &freqs, retval);
-
-               /*
-                * Failed after setting to intermediate freq? Driver should have
-                * reverted back to initial frequency and so should we. Check
-                * here for intermediate_freq instead of get_intermediate, in
-                * case we haven't switched to intermediate freq at all.
-                */
-               if (unlikely(retval && intermediate_freq)) {
-                       freqs.old = intermediate_freq;
-                       freqs.new = policy->restore_freq;
-                       cpufreq_freq_transition_begin(policy, &freqs);
-                       cpufreq_freq_transition_end(policy, &freqs, 0);
-               }
-       }
-
-       return retval;
-}
-
-int __cpufreq_driver_target(struct cpufreq_policy *policy,
-                           unsigned int target_freq,
-                           unsigned int relation)
-{
-       unsigned int old_target_freq = target_freq;
-       int index;
-
-       if (cpufreq_disabled())
-               return -ENODEV;
-
-       /* Make sure that target_freq is within supported range */
-       target_freq = clamp_val(target_freq, policy->min, policy->max);
-
-       pr_debug("target for CPU %u: %u kHz, relation %u, requested %u kHz\n",
-                policy->cpu, target_freq, relation, old_target_freq);
-
-       /*
-        * This might look like a redundant call as we are checking it again
-        * after finding index. But it is left intentionally for cases where
-        * exactly same freq is called again and so we can save on few function
-        * calls.
-        */
-       if (target_freq == policy->cur)
-               return 0;
-
-       /* Save last value to restore later on errors */
-       policy->restore_freq = policy->cur;
-
-       if (cpufreq_driver->target)
-               return cpufreq_driver->target(policy, target_freq, relation);
-
-       if (!cpufreq_driver->target_index)
-               return -EINVAL;
-
-       index = cpufreq_frequency_table_target(policy, target_freq, relation);
-
-       return __target_index(policy, index);
-}
-EXPORT_SYMBOL_GPL(__cpufreq_driver_target);
-
-int cpufreq_driver_target(struct cpufreq_policy *policy,
-                         unsigned int target_freq,
-                         unsigned int relation)
-{
-       int ret = -EINVAL;
-
-       down_write(&policy->rwsem);
-
-       ret = __cpufreq_driver_target(policy, target_freq, relation);
-
-       up_write(&policy->rwsem);
-
-       return ret;
-}
-EXPORT_SYMBOL_GPL(cpufreq_driver_target);
-
-__weak struct cpufreq_governor *cpufreq_fallback_governor(void)
-{
-       return NULL;
-}
-
-static int cpufreq_init_governor(struct cpufreq_policy *policy)
-{
-       int ret;
-
-       /* Don't start any governor operations if we are entering suspend */
-       if (cpufreq_suspended)
-               return 0;
-       /*
-        * Governor might not be initiated here if ACPI _PPC changed
-        * notification happened, so check it.
-        */
-       if (!policy->governor)
-               return -EINVAL;
-
-       /* Platform doesn't want dynamic frequency switching ? */
-       if (policy->governor->dynamic_switching &&
-           cpufreq_driver->flags & CPUFREQ_NO_AUTO_DYNAMIC_SWITCHING) {
-               struct cpufreq_governor *gov = cpufreq_fallback_governor();
-
-               if (gov) {
-                       pr_warn("Can't use %s governor as dynamic switching is 
disallowed. Fallback to %s governor\n",
-                               policy->governor->name, gov->name);
-                       policy->governor = gov;
-               } else {
-                       return -EINVAL;
-               }
-       }
-
-       if (!try_module_get(policy->governor->owner))
-               return -EINVAL;
-
-       pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
-
-       if (policy->governor->init) {
-               ret = policy->governor->init(policy);
-               if (ret) {
-                       module_put(policy->governor->owner);
-                       return ret;
-               }
-       }
-
-       return 0;
-}
-
-static void cpufreq_exit_governor(struct cpufreq_policy *policy)
-{
-       if (cpufreq_suspended || !policy->governor)
-               return;
-
-       pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
-
-       if (policy->governor->exit)
-               policy->governor->exit(policy);
-
-       module_put(policy->governor->owner);
-}
-
-static int cpufreq_start_governor(struct cpufreq_policy *policy)
-{
-       int ret;
-
-       if (cpufreq_suspended)
-               return 0;
-
-       if (!policy->governor)
-               return -EINVAL;
-
-       pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
-
-       if (cpufreq_driver->get && !cpufreq_driver->setpolicy)
-               cpufreq_update_current_freq(policy);
-
-       if (policy->governor->start) {
-               ret = policy->governor->start(policy);
-               if (ret)
-                       return ret;
-       }
-
-       if (policy->governor->limits)
-               policy->governor->limits(policy);
-
-       return 0;
-}
-
-static void cpufreq_stop_governor(struct cpufreq_policy *policy)
-{
-       if (cpufreq_suspended || !policy->governor)
-               return;
-
-       pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
-
-       if (policy->governor->stop)
-               policy->governor->stop(policy);
-}
-
-static void cpufreq_governor_limits(struct cpufreq_policy *policy)
-{
-       if (cpufreq_suspended || !policy->governor)
-               return;
-
-       pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
-
-       if (policy->governor->limits)
-               policy->governor->limits(policy);
-}
-
-int cpufreq_register_governor(struct cpufreq_governor *governor)
-{
-       int err;
-
-       if (!governor)
-               return -EINVAL;
-
-       if (cpufreq_disabled())
-               return -ENODEV;
-
-       mutex_lock(&cpufreq_governor_mutex);
-
-       err = -EBUSY;
-       if (!find_governor(governor->name)) {
-               err = 0;
-               list_add(&governor->governor_list, &cpufreq_governor_list);
-       }
-
-       mutex_unlock(&cpufreq_governor_mutex);
-       return err;
-}
-EXPORT_SYMBOL_GPL(cpufreq_register_governor);
-
-void cpufreq_unregister_governor(struct cpufreq_governor *governor)
-{
-       struct cpufreq_policy *policy;
-       unsigned long flags;
-
-       if (!governor)
-               return;
-
-       if (cpufreq_disabled())
-               return;
-
-       /* clear last_governor for all inactive policies */
-       read_lock_irqsave(&cpufreq_driver_lock, flags);
-       for_each_inactive_policy(policy) {
-               if (!strcmp(policy->last_governor, governor->name)) {
-                       policy->governor = NULL;
-                       strcpy(policy->last_governor, "\0");
-               }
-       }
-       read_unlock_irqrestore(&cpufreq_driver_lock, flags);
-
-       mutex_lock(&cpufreq_governor_mutex);
-       list_del(&governor->governor_list);
-       mutex_unlock(&cpufreq_governor_mutex);
-}
-EXPORT_SYMBOL_GPL(cpufreq_unregister_governor);
-
-
-/*********************************************************************
- *                          POLICY INTERFACE                         *
- *********************************************************************/
-
-/**
- * cpufreq_get_policy - get the current cpufreq_policy
- * @policy: struct cpufreq_policy into which the current cpufreq_policy
- *     is written
- *
- * Reads the current cpufreq policy.
- */
-int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu)
-{
-       struct cpufreq_policy *cpu_policy;
-       if (!policy)
-               return -EINVAL;
-
-       cpu_policy = cpufreq_cpu_get(cpu);
-       if (!cpu_policy)
-               return -EINVAL;
-
-       memcpy(policy, cpu_policy, sizeof(*policy));
-
-       cpufreq_cpu_put(cpu_policy);
-       return 0;
-}
-EXPORT_SYMBOL(cpufreq_get_policy);
-
-/*
- * policy : current policy.
- * new_policy: policy to be set.
- */
-static int cpufreq_set_policy(struct cpufreq_policy *policy,
-                               struct cpufreq_policy *new_policy)
-{
-       struct cpufreq_governor *old_gov;
-       int ret;
-
-       pr_debug("setting new policy for CPU %u: %u - %u kHz\n",
-                new_policy->cpu, new_policy->min, new_policy->max);
-
-       memcpy(&new_policy->cpuinfo, &policy->cpuinfo, sizeof(policy->cpuinfo));
-
-       /*
-       * This check works well when we store new min/max freq attributes,
-       * because new_policy is a copy of policy with one field updated.
-       */
-       if (new_policy->min > new_policy->max)
-               return -EINVAL;
-
-       /* verify the cpu speed can be set within this limit */
-       ret = cpufreq_driver->verify(new_policy);
-       if (ret)
-               return ret;
-
-       /* adjust if necessary - all reasons */
-       blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
-                       CPUFREQ_ADJUST, new_policy);
-
-       /*
-        * verify the cpu speed can be set within this limit, which might be
-        * different to the first one
-        */
-       ret = cpufreq_driver->verify(new_policy);
-       if (ret)
-               return ret;
-
-       /* notification of the new policy */
-       blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
-                       CPUFREQ_NOTIFY, new_policy);
-
-       policy->min = new_policy->min;
-       policy->max = new_policy->max;
-
-       policy->cached_target_freq = UINT_MAX;
-
-       pr_debug("new min and max freqs are %u - %u kHz\n",
-                policy->min, policy->max);
-
-       if (cpufreq_driver->setpolicy) {
-               policy->policy = new_policy->policy;
-               pr_debug("setting range\n");
-               return cpufreq_driver->setpolicy(new_policy);
-       }
-
-       if (new_policy->governor == policy->governor) {
-               pr_debug("cpufreq: governor limits update\n");
-               cpufreq_governor_limits(policy);
-               return 0;
-       }
-
-       pr_debug("governor switch\n");
-
-       /* save old, working values */
-       old_gov = policy->governor;
-       /* end old governor */
-       if (old_gov) {
-               cpufreq_stop_governor(policy);
-               cpufreq_exit_governor(policy);
-       }
-
-       /* start new governor */
-       policy->governor = new_policy->governor;
-       ret = cpufreq_init_governor(policy);
-       if (!ret) {
-               ret = cpufreq_start_governor(policy);
-               if (!ret) {
-                       pr_debug("cpufreq: governor change\n");
-                       return 0;
-               }
-               cpufreq_exit_governor(policy);
-       }
-
-       /* new governor failed, so re-start old one */
-       pr_debug("starting governor %s failed\n", policy->governor->name);
-       if (old_gov) {
-               policy->governor = old_gov;
-               if (cpufreq_init_governor(policy))
-                       policy->governor = NULL;
-               else
-                       cpufreq_start_governor(policy);
-       }
-
-       return ret;
-}
-
-/**
- *     cpufreq_update_policy - re-evaluate an existing cpufreq policy
- *     @cpu: CPU which shall be re-evaluated
- *
- *     Useful for policy notifiers which have different necessities
- *     at different times.
- */
-void cpufreq_update_policy(unsigned int cpu)
-{
-       struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
-       struct cpufreq_policy new_policy;
-
-       if (!policy)
-               return;
-
-       down_write(&policy->rwsem);
-
-       if (policy_is_inactive(policy))
-               goto unlock;
-
-       pr_debug("updating policy for CPU %u\n", cpu);
-       memcpy(&new_policy, policy, sizeof(*policy));
-       new_policy.min = policy->user_policy.min;
-       new_policy.max = policy->user_policy.max;
-
-       /*
-        * BIOS might change freq behind our back
-        * -> ask driver for current freq and notify governors about a change
-        */
-       if (cpufreq_driver->get && !cpufreq_driver->setpolicy) {
-               if (cpufreq_suspended)
-                       goto unlock;
-
-               new_policy.cur = cpufreq_update_current_freq(policy);
-               if (WARN_ON(!new_policy.cur))
-                       goto unlock;
-       }
-
-       cpufreq_set_policy(policy, &new_policy);
-
-unlock:
-       up_write(&policy->rwsem);
-
-       cpufreq_cpu_put(policy);
-}
-EXPORT_SYMBOL(cpufreq_update_policy);
-
-/*********************************************************************
- *               BOOST                                              *
- *********************************************************************/
-static int cpufreq_boost_set_sw(int state)
-{
-       struct cpufreq_policy *policy;
-       int ret = -EINVAL;
-
-       for_each_active_policy(policy) {
-               if (!policy->freq_table)
-                       continue;
-
-               ret = cpufreq_frequency_table_cpuinfo(policy,
-                                                     policy->freq_table);
-               if (ret) {
-                       pr_err("%s: Policy frequency update failed\n",
-                              __func__);
-                       break;
-               }
-
-               down_write(&policy->rwsem);
-               policy->user_policy.max = policy->max;
-               cpufreq_governor_limits(policy);
-               up_write(&policy->rwsem);
-       }
-
-       return ret;
-}
-
-int cpufreq_boost_trigger_state(int state)
-{
-       unsigned long flags;
-       int ret = 0;
-
-       if (cpufreq_driver->boost_enabled == state)
-               return 0;
-
-       write_lock_irqsave(&cpufreq_driver_lock, flags);
-       cpufreq_driver->boost_enabled = state;
-       write_unlock_irqrestore(&cpufreq_driver_lock, flags);
-
-       ret = cpufreq_driver->set_boost(state);
-       if (ret) {
-               write_lock_irqsave(&cpufreq_driver_lock, flags);
-               cpufreq_driver->boost_enabled = !state;
-               write_unlock_irqrestore(&cpufreq_driver_lock, flags);
-
-               pr_err("%s: Cannot %s BOOST\n",
-                      __func__, state ? "enable" : "disable");
-       }
-
-       return ret;
-}
-
-static bool cpufreq_boost_supported(void)
-{
-       return likely(cpufreq_driver) && cpufreq_driver->set_boost;
-}
-
-static int create_boost_sysfs_file(void)
-{
-       int ret;
-
-       ret = sysfs_create_file(cpufreq_global_kobject, &boost.attr);
-       if (ret)
-               pr_err("%s: cannot register global BOOST sysfs file\n",
-                      __func__);
-
-       return ret;
-}
-
-static void remove_boost_sysfs_file(void)
-{
-       if (cpufreq_boost_supported())
-               sysfs_remove_file(cpufreq_global_kobject, &boost.attr);
-}
-
-int cpufreq_enable_boost_support(void)
-{
-       if (!cpufreq_driver)
-               return -EINVAL;
-
-       if (cpufreq_boost_supported())
-               return 0;
-
-       cpufreq_driver->set_boost = cpufreq_boost_set_sw;
-
-       /* This will get removed on driver unregister */
-       return create_boost_sysfs_file();
-}
-EXPORT_SYMBOL_GPL(cpufreq_enable_boost_support);
-
-int cpufreq_boost_enabled(void)
-{
-       return cpufreq_driver->boost_enabled;
-}
-EXPORT_SYMBOL_GPL(cpufreq_boost_enabled);
-
-/*********************************************************************
- *               REGISTER / UNREGISTER CPUFREQ DRIVER                *
- *********************************************************************/
-static enum cpuhp_state hp_online;
-
-static int cpuhp_cpufreq_online(unsigned int cpu)
-{
-       cpufreq_online(cpu);
-
-       return 0;
-}
-
-static int cpuhp_cpufreq_offline(unsigned int cpu)
-{
-       cpufreq_offline(cpu);
-
-       return 0;
-}
-
-/**
- * cpufreq_register_driver - register a CPU Frequency driver
- * @driver_data: A struct cpufreq_driver containing the values#
- * submitted by the CPU Frequency driver.
- *
- * Registers a CPU Frequency driver to this core code. This code
- * returns zero on success, -EEXIST when another driver got here first
- * (and isn't unregistered in the meantime).
- *
- */
-int cpufreq_register_driver(struct cpufreq_driver *driver_data)
-{
-       unsigned long flags;
-       int ret;
-
-       if (cpufreq_disabled())
-               return -ENODEV;
-
-       if (!driver_data || !driver_data->verify || !driver_data->init ||
-           !(driver_data->setpolicy || driver_data->target_index ||
-                   driver_data->target) ||
-            (driver_data->setpolicy && (driver_data->target_index ||
-                   driver_data->target)) ||
-            (!!driver_data->get_intermediate != 
!!driver_data->target_intermediate))
-               return -EINVAL;
-
-       pr_debug("trying to register driver %s\n", driver_data->name);
-
-       /* Protect against concurrent CPU online/offline. */
-       cpus_read_lock();
-
-       write_lock_irqsave(&cpufreq_driver_lock, flags);
-       if (cpufreq_driver) {
-               write_unlock_irqrestore(&cpufreq_driver_lock, flags);
-               ret = -EEXIST;
-               goto out;
-       }
-       cpufreq_driver = driver_data;
-       write_unlock_irqrestore(&cpufreq_driver_lock, flags);
-
-       if (driver_data->setpolicy)
-               driver_data->flags |= CPUFREQ_CONST_LOOPS;
-
-       if (cpufreq_boost_supported()) {
-               ret = create_boost_sysfs_file();
-               if (ret)
-                       goto err_null_driver;
-       }
-
-       ret = subsys_interface_register(&cpufreq_interface);
-       if (ret)
-               goto err_boost_unreg;
-
-       if (!(cpufreq_driver->flags & CPUFREQ_STICKY) &&
-           list_empty(&cpufreq_policy_list)) {
-               /* if all ->init() calls failed, unregister */
-               ret = -ENODEV;
-               pr_debug("%s: No CPU initialized for driver %s\n", __func__,
-                        driver_data->name);
-               goto err_if_unreg;
-       }
-
-       ret = cpuhp_setup_state_nocalls_cpuslocked(CPUHP_AP_ONLINE_DYN,
-                                                  "cpufreq:online",
-                                                  cpuhp_cpufreq_online,
-                                                  cpuhp_cpufreq_offline);
-       if (ret < 0)
-               goto err_if_unreg;
-       hp_online = ret;
-       ret = 0;
-
-       pr_debug("driver %s up and running\n", driver_data->name);
-       goto out;
-
-err_if_unreg:
-       subsys_interface_unregister(&cpufreq_interface);
-err_boost_unreg:
-       remove_boost_sysfs_file();
-err_null_driver:
-       write_lock_irqsave(&cpufreq_driver_lock, flags);
-       cpufreq_driver = NULL;
-       write_unlock_irqrestore(&cpufreq_driver_lock, flags);
-out:
-       cpus_read_unlock();
-       return ret;
-}
-EXPORT_SYMBOL_GPL(cpufreq_register_driver);
-
-/**
- * cpufreq_unregister_driver - unregister the current CPUFreq driver
- *
- * Unregister the current CPUFreq driver. Only call this if you have
- * the right to do so, i.e. if you have succeeded in initialising before!
- * Returns zero if successful, and -EINVAL if the cpufreq_driver is
- * currently not initialised.
- */
-int cpufreq_unregister_driver(struct cpufreq_driver *driver)
-{
-       unsigned long flags;
-
-       if (!cpufreq_driver || (driver != cpufreq_driver))
-               return -EINVAL;
-
-       pr_debug("unregistering driver %s\n", driver->name);
-
-       /* Protect against concurrent cpu hotplug */
-       cpus_read_lock();
-       subsys_interface_unregister(&cpufreq_interface);
-       remove_boost_sysfs_file();
-       cpuhp_remove_state_nocalls_cpuslocked(hp_online);
-
-       write_lock_irqsave(&cpufreq_driver_lock, flags);
-
-       cpufreq_driver = NULL;
-
-       write_unlock_irqrestore(&cpufreq_driver_lock, flags);
-       cpus_read_unlock();
-
-       return 0;
-}
-EXPORT_SYMBOL_GPL(cpufreq_unregister_driver);
-
-/*
- * Stop cpufreq at shutdown to make sure it isn't holding any locks
- * or mutexes when secondary CPUs are halted.
- */
-static struct syscore_ops cpufreq_syscore_ops = {
-       .shutdown = cpufreq_suspend,
-};
-
-struct kobject *cpufreq_global_kobject;
-EXPORT_SYMBOL(cpufreq_global_kobject);
-
-static int __init cpufreq_core_init(void)
-{
-       if (cpufreq_disabled())
-               return -ENODEV;
-
-       cpufreq_global_kobject = kobject_create_and_add("cpufreq", 
&cpu_subsys.dev_root->kobj);
-       BUG_ON(!cpufreq_global_kobject);
-
-       register_syscore_ops(&cpufreq_syscore_ops);
-
-       return 0;
-}
-module_param(off, int, 0444);
-core_initcall(cpufreq_core_init);
-- 
2.7.4

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