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Merge back earlier cpufreq changes for v4.8.

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This commit is contained in:
Rafael J. Wysocki
2016-06-13 23:33:17 +02:00
parent 5edb56491d f6709b8aa7
commit bb4b9933e2
24 changed files with 407 additions and 600 deletions
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13
drivers/cpufreq/Kconfig
View File

@@ -31,23 +31,18 @@ config CPU_FREQ_BOOST_SW
depends on THERMAL
config CPU_FREQ_STAT
tristate "CPU frequency translation statistics"
bool "CPU frequency transition statistics"
default y
help
This driver exports CPU frequency statistics information through sysfs
file system.
To compile this driver as a module, choose M here: the
module will be called cpufreq_stats.
Export CPU frequency statistics information through sysfs.
If in doubt, say N.
config CPU_FREQ_STAT_DETAILS
bool "CPU frequency translation statistics details"
bool "CPU frequency transition statistics details"
depends on CPU_FREQ_STAT
help
This will show detail CPU frequency translation table in sysfs file
system.
Show detailed CPU frequency transition table in sysfs.
If in doubt, say N.

10
drivers/cpufreq/amd_freq_sensitivity.c
View File

@@ -48,9 +48,8 @@ static unsigned int amd_powersave_bias_target(struct cpufreq_policy *policy,
struct policy_dbs_info *policy_dbs = policy->governor_data;
struct dbs_data *od_data = policy_dbs->dbs_data;
struct od_dbs_tuners *od_tuners = od_data->tuners;
struct od_policy_dbs_info *od_info = to_dbs_info(policy_dbs);
if (!od_info->freq_table)
if (!policy->freq_table)
return freq_next;
rdmsr_on_cpu(policy->cpu, MSR_AMD64_FREQ_SENSITIVITY_ACTUAL,
@@ -92,10 +91,9 @@ static unsigned int amd_powersave_bias_target(struct cpufreq_policy *policy,
else {
unsigned int index;
cpufreq_frequency_table_target(policy,
od_info->freq_table, policy->cur - 1,
CPUFREQ_RELATION_H, &index);
freq_next = od_info->freq_table[index].frequency;
index = cpufreq_frequency_table_target(policy,
policy->cur - 1, CPUFREQ_RELATION_H);
freq_next = policy->freq_table[index].frequency;
}
data->freq_prev = freq_next;

184
drivers/cpufreq/cpufreq.c
View File

@@ -74,19 +74,12 @@ static inline bool has_target(void)
}
/* internal prototypes */
static int cpufreq_governor(struct cpufreq_policy *policy, unsigned int event);
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 inline void cpufreq_exit_governor(struct cpufreq_policy *policy)
{
(void)cpufreq_governor(policy, CPUFREQ_GOV_POLICY_EXIT);
}
static inline void cpufreq_stop_governor(struct cpufreq_policy *policy)
{
(void)cpufreq_governor(policy, CPUFREQ_GOV_STOP);
}
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
@@ -133,15 +126,6 @@ struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy)
}
EXPORT_SYMBOL_GPL(get_governor_parent_kobj);
struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu)
{
struct cpufreq_policy *policy = per_cpu(cpufreq_cpu_data, cpu);
return policy && !policy_is_inactive(policy) ?
policy->freq_table : NULL;
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_get_table);
static inline u64 get_cpu_idle_time_jiffy(unsigned int cpu, u64 *wall)
{
u64 idle_time;
@@ -354,6 +338,7 @@ static void __cpufreq_notify_transition(struct cpufreq_policy *policy,
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))
@@ -1115,6 +1100,7 @@ static void cpufreq_policy_put_kobj(struct cpufreq_policy *policy, bool notify)
CPUFREQ_REMOVE_POLICY, policy);
down_write(&policy->rwsem);
cpufreq_stats_free_table(policy);
cpufreq_remove_dev_symlink(policy);
kobj = &policy->kobj;
cmp = &policy->kobj_unregister;
@@ -1265,13 +1251,12 @@ static int cpufreq_online(unsigned int cpu)
}
}
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_START, policy);
if (new_policy) {
ret = cpufreq_add_dev_interface(policy);
if (ret)
goto out_exit_policy;
cpufreq_stats_create_table(policy);
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_CREATE_POLICY, policy);
@@ -1280,6 +1265,9 @@ static int cpufreq_online(unsigned int cpu)
write_unlock_irqrestore(&cpufreq_driver_lock, flags);
}
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_START, policy);
ret = cpufreq_init_policy(policy);
if (ret) {
pr_err("%s: Failed to initialize policy for cpu: %d (%d)\n",
@@ -1864,14 +1852,17 @@ static int __target_intermediate(struct cpufreq_policy *policy,
return ret;
}
static int __target_index(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *freq_table, int index)
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 */
@@ -1886,7 +1877,7 @@ static int __target_index(struct cpufreq_policy *policy,
freqs.old = freqs.new;
}
freqs.new = freq_table[index].frequency;
freqs.new = newfreq;
pr_debug("%s: cpu: %d, oldfreq: %u, new freq: %u\n",
__func__, policy->cpu, freqs.old, freqs.new);
@@ -1923,17 +1914,13 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
unsigned int relation)
{
unsigned int old_target_freq = target_freq;
struct cpufreq_frequency_table *freq_table;
int index, retval;
int index;
if (cpufreq_disabled())
return -ENODEV;
/* Make sure that target_freq is within supported range */
if (target_freq > policy->max)
target_freq = policy->max;
if (target_freq < policy->min)
target_freq = policy->min;
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);
@@ -1956,23 +1943,9 @@ int __cpufreq_driver_target(struct cpufreq_policy *policy,
if (!cpufreq_driver->target_index)
return -EINVAL;
freq_table = cpufreq_frequency_get_table(policy->cpu);
if (unlikely(!freq_table)) {
pr_err("%s: Unable to find freq_table\n", __func__);
return -EINVAL;
}
index = cpufreq_frequency_table_target(policy, target_freq, relation);
retval = cpufreq_frequency_table_target(policy, freq_table, target_freq,
relation, &index);
if (unlikely(retval)) {
pr_err("%s: Unable to find matching freq\n", __func__);
return retval;
}
if (freq_table[index].frequency == policy->cur)
return 0;
return __target_index(policy, freq_table, index);
return __target_index(policy, index);
}
EXPORT_SYMBOL_GPL(__cpufreq_driver_target);
@@ -1997,7 +1970,7 @@ __weak struct cpufreq_governor *cpufreq_fallback_governor(void)
return NULL;
}
static int cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
static int cpufreq_init_governor(struct cpufreq_policy *policy)
{
int ret;
@@ -2025,36 +1998,82 @@ static int cpufreq_governor(struct cpufreq_policy *policy, unsigned int event)
}
}
if (event == CPUFREQ_GOV_POLICY_INIT)
if (!try_module_get(policy->governor->owner))
return -EINVAL;
if (!try_module_get(policy->governor->owner))
return -EINVAL;
pr_debug("%s: for CPU %u, event %u\n", __func__, policy->cpu, event);
pr_debug("%s: for CPU %u\n", __func__, policy->cpu);
ret = policy->governor->governor(policy, event);
if (event == CPUFREQ_GOV_POLICY_INIT) {
if (ret)
if (policy->governor->init) {
ret = policy->governor->init(policy);
if (ret) {
module_put(policy->governor->owner);
else
policy->governor->initialized++;
} else if (event == CPUFREQ_GOV_POLICY_EXIT) {
policy->governor->initialized--;
module_put(policy->governor->owner);
return ret;
}
}
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);
ret = cpufreq_governor(policy, CPUFREQ_GOV_START);
return ret ? ret : cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
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)
@@ -2069,7 +2088,6 @@ int cpufreq_register_governor(struct cpufreq_governor *governor)
mutex_lock(&cpufreq_governor_mutex);
governor->initialized = 0;
err = -EBUSY;
if (!find_governor(governor->name)) {
err = 0;
@@ -2195,7 +2213,8 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
if (new_policy->governor == policy->governor) {
pr_debug("cpufreq: governor limits update\n");
return cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
cpufreq_governor_limits(policy);
return 0;
}
pr_debug("governor switch\n");
@@ -2210,7 +2229,7 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
/* start new governor */
policy->governor = new_policy->governor;
ret = cpufreq_governor(policy, CPUFREQ_GOV_POLICY_INIT);
ret = cpufreq_init_governor(policy);
if (!ret) {
ret = cpufreq_start_governor(policy);
if (!ret) {
@@ -2224,7 +2243,7 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy,
pr_debug("starting governor %s failed\n", policy->governor->name);
if (old_gov) {
policy->governor = old_gov;
if (cpufreq_governor(policy, CPUFREQ_GOV_POLICY_INIT))
if (cpufreq_init_governor(policy))
policy->governor = NULL;
else
cpufreq_start_governor(policy);
@@ -2305,26 +2324,25 @@ static struct notifier_block __refdata cpufreq_cpu_notifier = {
*********************************************************************/
static int cpufreq_boost_set_sw(int state)
{
struct cpufreq_frequency_table *freq_table;
struct cpufreq_policy *policy;
int ret = -EINVAL;
for_each_active_policy(policy) {
freq_table = cpufreq_frequency_get_table(policy->cpu);
if (freq_table) {
ret = cpufreq_frequency_table_cpuinfo(policy,
freq_table);
if (ret) {
pr_err("%s: Policy frequency update failed\n",
__func__);
break;
}
if (!policy->freq_table)
continue;
down_write(&policy->rwsem);
policy->user_policy.max = policy->max;
cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
up_write(&policy->rwsem);
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;

51
drivers/cpufreq/cpufreq_conservative.c
View File

@@ -127,7 +127,6 @@ static struct notifier_block cs_cpufreq_notifier_block = {
};
/************************** sysfs interface ************************/
static struct dbs_governor cs_dbs_gov;
static ssize_t store_sampling_down_factor(struct gov_attr_set *attr_set,
const char *buf, size_t count)
@@ -255,6 +254,13 @@ static struct attribute *cs_attributes[] = {
/************************** sysfs end ************************/
struct cs_governor {
struct dbs_governor dbs_gov;
unsigned int usage_count;
};
static struct cs_governor cs_gov;
static struct policy_dbs_info *cs_alloc(void)
{
struct cs_policy_dbs_info *dbs_info;
@@ -268,15 +274,13 @@ static void cs_free(struct policy_dbs_info *policy_dbs)
kfree(to_dbs_info(policy_dbs));
}
static int cs_init(struct dbs_data *dbs_data, bool notify)
static int cs_init(struct dbs_data *dbs_data)
{
struct cs_dbs_tuners *tuners;
tuners = kzalloc(sizeof(*tuners), GFP_KERNEL);
if (!tuners) {
pr_err("%s: kzalloc failed\n", __func__);
if (!tuners)
return -ENOMEM;
}
tuners->down_threshold = DEF_FREQUENCY_DOWN_THRESHOLD;
tuners->freq_step = DEF_FREQUENCY_STEP;
@@ -288,16 +292,22 @@ static int cs_init(struct dbs_data *dbs_data, bool notify)
dbs_data->min_sampling_rate = MIN_SAMPLING_RATE_RATIO *
jiffies_to_usecs(10);
if (notify)
/*
* This function and cs_exit() are only called under gov_dbs_data_mutex
* which is global, so the cs_gov.usage_count accesses are guaranteed
* to be serialized.
*/
if (!cs_gov.usage_count++)
cpufreq_register_notifier(&cs_cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
return 0;
}
static void cs_exit(struct dbs_data *dbs_data, bool notify)
static void cs_exit(struct dbs_data *dbs_data)
{
if (notify)
/* Protected by gov_dbs_data_mutex - see the comment in cs_init(). */
if (!--cs_gov.usage_count)
cpufreq_unregister_notifier(&cs_cpufreq_notifier_block,
CPUFREQ_TRANSITION_NOTIFIER);
@@ -312,23 +322,20 @@ static void cs_start(struct cpufreq_policy *policy)
dbs_info->requested_freq = policy->cur;
}
static struct dbs_governor cs_dbs_gov = {
.gov = {
.name = "conservative",
.governor = cpufreq_governor_dbs,
.max_transition_latency = TRANSITION_LATENCY_LIMIT,
.owner = THIS_MODULE,
static struct cs_governor cs_gov = {
.dbs_gov = {
.gov = CPUFREQ_DBS_GOVERNOR_INITIALIZER("conservative"),
.kobj_type = { .default_attrs = cs_attributes },
.gov_dbs_timer = cs_dbs_timer,
.alloc = cs_alloc,
.free = cs_free,
.init = cs_init,
.exit = cs_exit,
.start = cs_start,
},
.kobj_type = { .default_attrs = cs_attributes },
.gov_dbs_timer = cs_dbs_timer,
.alloc = cs_alloc,
.free = cs_free,
.init = cs_init,
.exit = cs_exit,
.start = cs_start,
};
#define CPU_FREQ_GOV_CONSERVATIVE (&cs_dbs_gov.gov)
#define CPU_FREQ_GOV_CONSERVATIVE (&cs_gov.dbs_gov.gov)
static int dbs_cpufreq_notifier(struct notifier_block *nb, unsigned long val,
void *data)

75
drivers/cpufreq/cpufreq_governor.c
View File

@@ -336,17 +336,6 @@ static inline void gov_clear_update_util(struct cpufreq_policy *policy)
synchronize_sched();
}
static void gov_cancel_work(struct cpufreq_policy *policy)
{
struct policy_dbs_info *policy_dbs = policy->governor_data;
gov_clear_update_util(policy_dbs->policy);
irq_work_sync(&policy_dbs->irq_work);
cancel_work_sync(&policy_dbs->work);
atomic_set(&policy_dbs->work_count, 0);
policy_dbs->work_in_progress = false;
}
static struct policy_dbs_info *alloc_policy_dbs_info(struct cpufreq_policy *policy,
struct dbs_governor *gov)
{
@@ -389,7 +378,7 @@ static void free_policy_dbs_info(struct policy_dbs_info *policy_dbs,
gov->free(policy_dbs);
}
static int cpufreq_governor_init(struct cpufreq_policy *policy)
int cpufreq_dbs_governor_init(struct cpufreq_policy *policy)
{
struct dbs_governor *gov = dbs_governor_of(policy);
struct dbs_data *dbs_data;
@@ -429,7 +418,7 @@ static int cpufreq_governor_init(struct cpufreq_policy *policy)
gov_attr_set_init(&dbs_data->attr_set, &policy_dbs->list);
ret = gov->init(dbs_data, !policy->governor->initialized);
ret = gov->init(dbs_data);
if (ret)
goto free_policy_dbs_info;
@@ -458,13 +447,13 @@ static int cpufreq_governor_init(struct cpufreq_policy *policy)
goto out;
/* Failure, so roll back. */
pr_err("cpufreq: Governor initialization failed (dbs_data kobject init error %d)\n", ret);
pr_err("initialization failed (dbs_data kobject init error %d)\n", ret);
policy->governor_data = NULL;
if (!have_governor_per_policy())
gov->gdbs_data = NULL;
gov->exit(dbs_data, !policy->governor->initialized);
gov->exit(dbs_data);
kfree(dbs_data);
free_policy_dbs_info:
@@ -474,8 +463,9 @@ out:
mutex_unlock(&gov_dbs_data_mutex);
return ret;
}
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_init);
static int cpufreq_governor_exit(struct cpufreq_policy *policy)
void cpufreq_dbs_governor_exit(struct cpufreq_policy *policy)
{
struct dbs_governor *gov = dbs_governor_of(policy);
struct policy_dbs_info *policy_dbs = policy->governor_data;
@@ -493,17 +483,17 @@ static int cpufreq_governor_exit(struct cpufreq_policy *policy)
if (!have_governor_per_policy())
gov->gdbs_data = NULL;
gov->exit(dbs_data, policy->governor->initialized == 1);
gov->exit(dbs_data);
kfree(dbs_data);
}
free_policy_dbs_info(policy_dbs, gov);
mutex_unlock(&gov_dbs_data_mutex);
return 0;
}
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_exit);
static int cpufreq_governor_start(struct cpufreq_policy *policy)
int cpufreq_dbs_governor_start(struct cpufreq_policy *policy)
{
struct dbs_governor *gov = dbs_governor_of(policy);
struct policy_dbs_info *policy_dbs = policy->governor_data;
@@ -539,47 +529,28 @@ static int cpufreq_governor_start(struct cpufreq_policy *policy)
gov_set_update_util(policy_dbs, sampling_rate);
return 0;
}
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_start);
static int cpufreq_governor_stop(struct cpufreq_policy *policy)
void cpufreq_dbs_governor_stop(struct cpufreq_policy *policy)
{
gov_cancel_work(policy);
return 0;
}
struct policy_dbs_info *policy_dbs = policy->governor_data;
static int cpufreq_governor_limits(struct cpufreq_policy *policy)
gov_clear_update_util(policy_dbs->policy);
irq_work_sync(&policy_dbs->irq_work);
cancel_work_sync(&policy_dbs->work);
atomic_set(&policy_dbs->work_count, 0);
policy_dbs->work_in_progress = false;
}
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_stop);
void cpufreq_dbs_governor_limits(struct cpufreq_policy *policy)
{
struct policy_dbs_info *policy_dbs = policy->governor_data;
mutex_lock(&policy_dbs->timer_mutex);
if (policy->max < policy->cur)
__cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
else if (policy->min > policy->cur)
__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
cpufreq_policy_apply_limits(policy);
gov_update_sample_delay(policy_dbs, 0);
mutex_unlock(&policy_dbs->timer_mutex);
return 0;
}
int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event)
{
if (event == CPUFREQ_GOV_POLICY_INIT) {
return cpufreq_governor_init(policy);
} else if (policy->governor_data) {
switch (event) {
case CPUFREQ_GOV_POLICY_EXIT:
return cpufreq_governor_exit(policy);
case CPUFREQ_GOV_START:
return cpufreq_governor_start(policy);
case CPUFREQ_GOV_STOP:
return cpufreq_governor_stop(policy);
case CPUFREQ_GOV_LIMITS:
return cpufreq_governor_limits(policy);
}
}
return -EINVAL;
}
EXPORT_SYMBOL_GPL(cpufreq_governor_dbs);
EXPORT_SYMBOL_GPL(cpufreq_dbs_governor_limits);

24
drivers/cpufreq/cpufreq_governor.h
View File

@@ -138,8 +138,8 @@ struct dbs_governor {
unsigned int (*gov_dbs_timer)(struct cpufreq_policy *policy);
struct policy_dbs_info *(*alloc)(void);
void (*free)(struct policy_dbs_info *policy_dbs);
int (*init)(struct dbs_data *dbs_data, bool notify);
void (*exit)(struct dbs_data *dbs_data, bool notify);
int (*init)(struct dbs_data *dbs_data);
void (*exit)(struct dbs_data *dbs_data);
void (*start)(struct cpufreq_policy *policy);
};
@@ -148,6 +148,25 @@ static inline struct dbs_governor *dbs_governor_of(struct cpufreq_policy *policy
return container_of(policy->governor, struct dbs_governor, gov);
}
/* Governor callback routines */
int cpufreq_dbs_governor_init(struct cpufreq_policy *policy);
void cpufreq_dbs_governor_exit(struct cpufreq_policy *policy);
int cpufreq_dbs_governor_start(struct cpufreq_policy *policy);
void cpufreq_dbs_governor_stop(struct cpufreq_policy *policy);
void cpufreq_dbs_governor_limits(struct cpufreq_policy *policy);
#define CPUFREQ_DBS_GOVERNOR_INITIALIZER(_name_) \
{ \
.name = _name_, \
.max_transition_latency = TRANSITION_LATENCY_LIMIT, \
.owner = THIS_MODULE, \
.init = cpufreq_dbs_governor_init, \
.exit = cpufreq_dbs_governor_exit, \
.start = cpufreq_dbs_governor_start, \
.stop = cpufreq_dbs_governor_stop, \
.limits = cpufreq_dbs_governor_limits, \
}
/* Governor specific operations */
struct od_ops {
unsigned int (*powersave_bias_target)(struct cpufreq_policy *policy,
@@ -155,7 +174,6 @@ struct od_ops {
};
unsigned int dbs_update(struct cpufreq_policy *policy);
int cpufreq_governor_dbs(struct cpufreq_policy *policy, unsigned int event);
void od_register_powersave_bias_handler(unsigned int (*f)
(struct cpufreq_policy *, unsigned int, unsigned int),
unsigned int powersave_bias);

40
drivers/cpufreq/cpufreq_ondemand.c
View File

@@ -65,34 +65,32 @@ static unsigned int generic_powersave_bias_target(struct cpufreq_policy *policy,
{
unsigned int freq_req, freq_reduc, freq_avg;
unsigned int freq_hi, freq_lo;
unsigned int index = 0;
unsigned int index;
unsigned int delay_hi_us;
struct policy_dbs_info *policy_dbs = policy->governor_data;
struct od_policy_dbs_info *dbs_info = to_dbs_info(policy_dbs);
struct dbs_data *dbs_data = policy_dbs->dbs_data;
struct od_dbs_tuners *od_tuners = dbs_data->tuners;
struct cpufreq_frequency_table *freq_table = policy->freq_table;
if (!dbs_info->freq_table) {
if (!freq_table) {
dbs_info->freq_lo = 0;
dbs_info->freq_lo_delay_us = 0;
return freq_next;
}
cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_next,
relation, &index);
freq_req = dbs_info->freq_table[index].frequency;
index = cpufreq_frequency_table_target(policy, freq_next, relation);
freq_req = freq_table[index].frequency;
freq_reduc = freq_req * od_tuners->powersave_bias / 1000;
freq_avg = freq_req - freq_reduc;
/* Find freq bounds for freq_avg in freq_table */
index = 0;
cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_avg,
CPUFREQ_RELATION_H, &index);
freq_lo = dbs_info->freq_table[index].frequency;
index = 0;
cpufreq_frequency_table_target(policy, dbs_info->freq_table, freq_avg,
CPUFREQ_RELATION_L, &index);
freq_hi = dbs_info->freq_table[index].frequency;
index = cpufreq_frequency_table_target(policy, freq_avg,
CPUFREQ_RELATION_H);
freq_lo = freq_table[index].frequency;
index = cpufreq_frequency_table_target(policy, freq_avg,
CPUFREQ_RELATION_L);
freq_hi = freq_table[index].frequency;
/* Find out how long we have to be in hi and lo freqs */
if (freq_hi == freq_lo) {
@@ -113,7 +111,6 @@ static void ondemand_powersave_bias_init(struct cpufreq_policy *policy)
{
struct od_policy_dbs_info *dbs_info = to_dbs_info(policy->governor_data);
dbs_info->freq_table = cpufreq_frequency_get_table(policy->cpu);
dbs_info->freq_lo = 0;
}
@@ -361,17 +358,15 @@ static void od_free(struct policy_dbs_info *policy_dbs)
kfree(to_dbs_info(policy_dbs));
}
static int od_init(struct dbs_data *dbs_data, bool notify)
static int od_init(struct dbs_data *dbs_data)
{
struct od_dbs_tuners *tuners;
u64 idle_time;
int cpu;
tuners = kzalloc(sizeof(*tuners), GFP_KERNEL);
if (!tuners) {
pr_err("%s: kzalloc failed\n", __func__);
if (!tuners)
return -ENOMEM;
}
cpu = get_cpu();
idle_time = get_cpu_idle_time_us(cpu, NULL);
@@ -402,7 +397,7 @@ static int od_init(struct dbs_data *dbs_data, bool notify)
return 0;
}
static void od_exit(struct dbs_data *dbs_data, bool notify)
static void od_exit(struct dbs_data *dbs_data)
{
kfree(dbs_data->tuners);
}
@@ -420,12 +415,7 @@ static struct od_ops od_ops = {
};
static struct dbs_governor od_dbs_gov = {
.gov = {
.name = "ondemand",
.governor = cpufreq_governor_dbs,
.max_transition_latency = TRANSITION_LATENCY_LIMIT,
.owner = THIS_MODULE,
},
.gov = CPUFREQ_DBS_GOVERNOR_INITIALIZER("ondemand"),
.kobj_type = { .default_attrs = od_attributes },
.gov_dbs_timer = od_dbs_timer,
.alloc = od_alloc,

1
drivers/cpufreq/cpufreq_ondemand.h
View File

@@ -13,7 +13,6 @@
struct od_policy_dbs_info {
struct policy_dbs_info policy_dbs;
struct cpufreq_frequency_table *freq_table;
unsigned int freq_lo;
unsigned int freq_lo_delay_us;
unsigned int freq_hi_delay_us;

19
drivers/cpufreq/cpufreq_performance.c
View File

@@ -16,27 +16,16 @@
#include <linux/init.h>
#include <linux/module.h>
static int cpufreq_governor_performance(struct cpufreq_policy *policy,
unsigned int event)
static void cpufreq_gov_performance_limits(struct cpufreq_policy *policy)
{
switch (event) {
case CPUFREQ_GOV_START:
case CPUFREQ_GOV_LIMITS:
pr_debug("setting to %u kHz because of event %u\n",
policy->max, event);
__cpufreq_driver_target(policy, policy->max,
CPUFREQ_RELATION_H);
break;
default:
break;
}
return 0;
pr_debug("setting to %u kHz\n", policy->max);
__cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
}
static struct cpufreq_governor cpufreq_gov_performance = {
.name = "performance",
.governor = cpufreq_governor_performance,
.owner = THIS_MODULE,
.limits = cpufreq_gov_performance_limits,
};
static int __init cpufreq_gov_performance_init(void)

19
drivers/cpufreq/cpufreq_powersave.c
View File

@@ -16,26 +16,15 @@
#include <linux/init.h>
#include <linux/module.h>
static int cpufreq_governor_powersave(struct cpufreq_policy *policy,
unsigned int event)
static void cpufreq_gov_powersave_limits(struct cpufreq_policy *policy)
{
switch (event) {
case CPUFREQ_GOV_START:
case CPUFREQ_GOV_LIMITS:
pr_debug("setting to %u kHz because of event %u\n",
policy->min, event);
__cpufreq_driver_target(policy, policy->min,
CPUFREQ_RELATION_L);
break;
default:
break;
}
return 0;
pr_debug("setting to %u kHz\n", policy->min);
__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
}
static struct cpufreq_governor cpufreq_gov_powersave = {
.name = "powersave",
.governor = cpufreq_governor_powersave,
.limits = cpufreq_gov_powersave_limits,
.owner = THIS_MODULE,
};

157
drivers/cpufreq/cpufreq_stats.c
View File

@@ -15,7 +15,7 @@
#include <linux/slab.h>
#include <linux/cputime.h>
static spinlock_t cpufreq_stats_lock;
static DEFINE_SPINLOCK(cpufreq_stats_lock);
struct cpufreq_stats {
unsigned int total_trans;
@@ -52,6 +52,9 @@ static ssize_t show_time_in_state(struct cpufreq_policy *policy, char *buf)
ssize_t len = 0;
int i;
if (policy->fast_switch_enabled)
return 0;
cpufreq_stats_update(stats);
for (i = 0; i < stats->state_num; i++) {
len += sprintf(buf + len, "%u %llu\n", stats->freq_table[i],
@@ -68,6 +71,9 @@ static ssize_t show_trans_table(struct cpufreq_policy *policy, char *buf)
ssize_t len = 0;
int i, j;
if (policy->fast_switch_enabled)
return 0;
len += snprintf(buf + len, PAGE_SIZE - len, " From : To\n");
len += snprintf(buf + len, PAGE_SIZE - len, " : ");
for (i = 0; i < stats->state_num; i++) {
@@ -130,7 +136,7 @@ static int freq_table_get_index(struct cpufreq_stats *stats, unsigned int freq)
return -1;
}
static void __cpufreq_stats_free_table(struct cpufreq_policy *policy)
void cpufreq_stats_free_table(struct cpufreq_policy *policy)
{
struct cpufreq_stats *stats = policy->stats;
@@ -146,39 +152,25 @@ static void __cpufreq_stats_free_table(struct cpufreq_policy *policy)
policy->stats = NULL;
}
static void cpufreq_stats_free_table(unsigned int cpu)
{
struct cpufreq_policy *policy;
policy = cpufreq_cpu_get(cpu);
if (!policy)
return;
__cpufreq_stats_free_table(policy);
cpufreq_cpu_put(policy);
}
static int __cpufreq_stats_create_table(struct cpufreq_policy *policy)
void cpufreq_stats_create_table(struct cpufreq_policy *policy)
{
unsigned int i = 0, count = 0, ret = -ENOMEM;
struct cpufreq_stats *stats;
unsigned int alloc_size;
unsigned int cpu = policy->cpu;
struct cpufreq_frequency_table *pos, *table;
/* We need cpufreq table for creating stats table */
table = cpufreq_frequency_get_table(cpu);
table = policy->freq_table;
if (unlikely(!table))
return 0;
return;
/* stats already initialized */
if (policy->stats)
return -EEXIST;
return;
stats = kzalloc(sizeof(*stats), GFP_KERNEL);
if (!stats)
return -ENOMEM;
return;
/* Find total allocation size */
cpufreq_for_each_valid_entry(pos, table)
@@ -215,80 +207,32 @@ static int __cpufreq_stats_create_table(struct cpufreq_policy *policy)
policy->stats = stats;
ret = sysfs_create_group(&policy->kobj, &stats_attr_group);
if (!ret)
return 0;
return;
/* We failed, release resources */
policy->stats = NULL;
kfree(stats->time_in_state);
free_stat:
kfree(stats);
return ret;
}
static void cpufreq_stats_create_table(unsigned int cpu)
void cpufreq_stats_record_transition(struct cpufreq_policy *policy,
unsigned int new_freq)
{
struct cpufreq_policy *policy;
/*
* "likely(!policy)" because normally cpufreq_stats will be registered
* before cpufreq driver
*/
policy = cpufreq_cpu_get(cpu);
if (likely(!policy))
return;
__cpufreq_stats_create_table(policy);
cpufreq_cpu_put(policy);
}
static int cpufreq_stat_notifier_policy(struct notifier_block *nb,
unsigned long val, void *data)
{
int ret = 0;
struct cpufreq_policy *policy = data;
if (val == CPUFREQ_CREATE_POLICY)
ret = __cpufreq_stats_create_table(policy);
else if (val == CPUFREQ_REMOVE_POLICY)
__cpufreq_stats_free_table(policy);
return ret;
}
static int cpufreq_stat_notifier_trans(struct notifier_block *nb,
unsigned long val, void *data)
{
struct cpufreq_freqs *freq = data;
struct cpufreq_policy *policy = cpufreq_cpu_get(freq->cpu);
struct cpufreq_stats *stats;
struct cpufreq_stats *stats = policy->stats;
int old_index, new_index;
if (!policy) {
pr_err("%s: No policy found\n", __func__);
return 0;
}
if (val != CPUFREQ_POSTCHANGE)
goto put_policy;
if (!policy->stats) {
if (!stats) {
pr_debug("%s: No stats found\n", __func__);
goto put_policy;
return;
}
stats = policy->stats;
old_index = stats->last_index;
new_index = freq_table_get_index(stats, freq->new);
new_index = freq_table_get_index(stats, new_freq);
/* We can't do stats->time_in_state[-1]= .. */
if (old_index == -1 || new_index == -1)
goto put_policy;
if (old_index == new_index)
goto put_policy;
if (old_index == -1 || new_index == -1 || old_index == new_index)
return;
cpufreq_stats_update(stats);
@@ -297,61 +241,4 @@ static int cpufreq_stat_notifier_trans(struct notifier_block *nb,
stats->trans_table[old_index * stats->max_state + new_index]++;
#endif
stats->total_trans++;
put_policy:
cpufreq_cpu_put(policy);
return 0;
}
static struct notifier_block notifier_policy_block = {
.notifier_call = cpufreq_stat_notifier_policy
};
static struct notifier_block notifier_trans_block = {
.notifier_call = cpufreq_stat_notifier_trans
};
static int __init cpufreq_stats_init(void)
{
int ret;
unsigned int cpu;
spin_lock_init(&cpufreq_stats_lock);
ret = cpufreq_register_notifier(&notifier_policy_block,
CPUFREQ_POLICY_NOTIFIER);
if (ret)
return ret;
for_each_online_cpu(cpu)
cpufreq_stats_create_table(cpu);
ret = cpufreq_register_notifier(&notifier_trans_block,
CPUFREQ_TRANSITION_NOTIFIER);
if (ret) {
cpufreq_unregister_notifier(&notifier_policy_block,
CPUFREQ_POLICY_NOTIFIER);
for_each_online_cpu(cpu)
cpufreq_stats_free_table(cpu);
return ret;
}
return 0;
}
static void __exit cpufreq_stats_exit(void)
{
unsigned int cpu;
cpufreq_unregister_notifier(&notifier_policy_block,
CPUFREQ_POLICY_NOTIFIER);
cpufreq_unregister_notifier(&notifier_trans_block,
CPUFREQ_TRANSITION_NOTIFIER);
for_each_online_cpu(cpu)
cpufreq_stats_free_table(cpu);
}
MODULE_AUTHOR("Zou Nan hai <nanhai.zou@intel.com>");
MODULE_DESCRIPTION("Export cpufreq stats via sysfs");
MODULE_LICENSE("GPL");
module_init(cpufreq_stats_init);
module_exit(cpufreq_stats_exit);

96
drivers/cpufreq/cpufreq_userspace.c
View File

@@ -65,66 +65,66 @@ static int cpufreq_userspace_policy_init(struct cpufreq_policy *policy)
return 0;
}
static int cpufreq_governor_userspace(struct cpufreq_policy *policy,
unsigned int event)
static void cpufreq_userspace_policy_exit(struct cpufreq_policy *policy)
{
mutex_lock(&userspace_mutex);
kfree(policy->governor_data);
policy->governor_data = NULL;
mutex_unlock(&userspace_mutex);
}
static int cpufreq_userspace_policy_start(struct cpufreq_policy *policy)
{
unsigned int *setspeed = policy->governor_data;
unsigned int cpu = policy->cpu;
int rc = 0;
if (event == CPUFREQ_GOV_POLICY_INIT)
return cpufreq_userspace_policy_init(policy);
BUG_ON(!policy->cur);
pr_debug("started managing cpu %u\n", policy->cpu);
if (!setspeed)
return -EINVAL;
mutex_lock(&userspace_mutex);
per_cpu(cpu_is_managed, policy->cpu) = 1;
*setspeed = policy->cur;
mutex_unlock(&userspace_mutex);
return 0;
}
switch (event) {
case CPUFREQ_GOV_POLICY_EXIT:
mutex_lock(&userspace_mutex);
policy->governor_data = NULL;
kfree(setspeed);
mutex_unlock(&userspace_mutex);
break;
case CPUFREQ_GOV_START:
BUG_ON(!policy->cur);
pr_debug("started managing cpu %u\n", cpu);
static void cpufreq_userspace_policy_stop(struct cpufreq_policy *policy)
{
unsigned int *setspeed = policy->governor_data;
mutex_lock(&userspace_mutex);
per_cpu(cpu_is_managed, cpu) = 1;
*setspeed = policy->cur;
mutex_unlock(&userspace_mutex);
break;
case CPUFREQ_GOV_STOP:
pr_debug("managing cpu %u stopped\n", cpu);
pr_debug("managing cpu %u stopped\n", policy->cpu);
mutex_lock(&userspace_mutex);
per_cpu(cpu_is_managed, cpu) = 0;
*setspeed = 0;
mutex_unlock(&userspace_mutex);
break;
case CPUFREQ_GOV_LIMITS:
mutex_lock(&userspace_mutex);
pr_debug("limit event for cpu %u: %u - %u kHz, currently %u kHz, last set to %u kHz\n",
cpu, policy->min, policy->max, policy->cur, *setspeed);
mutex_lock(&userspace_mutex);
per_cpu(cpu_is_managed, policy->cpu) = 0;
*setspeed = 0;
mutex_unlock(&userspace_mutex);
}
if (policy->max < *setspeed)
__cpufreq_driver_target(policy, policy->max,
CPUFREQ_RELATION_H);
else if (policy->min > *setspeed)
__cpufreq_driver_target(policy, policy->min,
CPUFREQ_RELATION_L);
else
__cpufreq_driver_target(policy, *setspeed,
CPUFREQ_RELATION_L);
mutex_unlock(&userspace_mutex);
break;
}
return rc;
static void cpufreq_userspace_policy_limits(struct cpufreq_policy *policy)
{
unsigned int *setspeed = policy->governor_data;
mutex_lock(&userspace_mutex);
pr_debug("limit event for cpu %u: %u - %u kHz, currently %u kHz, last set to %u kHz\n",
policy->cpu, policy->min, policy->max, policy->cur, *setspeed);
if (policy->max < *setspeed)
__cpufreq_driver_target(policy, policy->max, CPUFREQ_RELATION_H);
else if (policy->min > *setspeed)
__cpufreq_driver_target(policy, policy->min, CPUFREQ_RELATION_L);
else
__cpufreq_driver_target(policy, *setspeed, CPUFREQ_RELATION_L);
mutex_unlock(&userspace_mutex);
}
static struct cpufreq_governor cpufreq_gov_userspace = {
.name = "userspace",
.governor = cpufreq_governor_userspace,
.init = cpufreq_userspace_policy_init,
.exit = cpufreq_userspace_policy_exit,
.start = cpufreq_userspace_policy_start,
.stop = cpufreq_userspace_policy_stop,
.limits = cpufreq_userspace_policy_limits,
.store_setspeed = cpufreq_set,
.show_setspeed = show_speed,
.owner = THIS_MODULE,

22
drivers/cpufreq/davinci-cpufreq.c
View File

@@ -38,26 +38,6 @@ struct davinci_cpufreq {
};
static struct davinci_cpufreq cpufreq;
static int davinci_verify_speed(struct cpufreq_policy *policy)
{
struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
struct cpufreq_frequency_table *freq_table = pdata->freq_table;
struct clk *armclk = cpufreq.armclk;
if (freq_table)
return cpufreq_frequency_table_verify(policy, freq_table);
if (policy->cpu)
return -EINVAL;
cpufreq_verify_within_cpu_limits(policy);
policy->min = clk_round_rate(armclk, policy->min * 1000) / 1000;
policy->max = clk_round_rate(armclk, policy->max * 1000) / 1000;
cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq,
policy->cpuinfo.max_freq);
return 0;
}
static int davinci_target(struct cpufreq_policy *policy, unsigned int idx)
{
struct davinci_cpufreq_config *pdata = cpufreq.dev->platform_data;
@@ -121,7 +101,7 @@ static int davinci_cpu_init(struct cpufreq_policy *policy)
static struct cpufreq_driver davinci_driver = {
.flags = CPUFREQ_STICKY | CPUFREQ_NEED_INITIAL_FREQ_CHECK,
.verify = davinci_verify_speed,
.verify = cpufreq_generic_frequency_table_verify,
.target_index = davinci_target,
.get = cpufreq_generic_get,
.init = davinci_cpu_init,

37
drivers/cpufreq/freq_table.c
View File

@@ -63,8 +63,6 @@ int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
else
return 0;
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_table_cpuinfo);
int cpufreq_frequency_table_verify(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table)
@@ -108,20 +106,16 @@ EXPORT_SYMBOL_GPL(cpufreq_frequency_table_verify);
*/
int cpufreq_generic_frequency_table_verify(struct cpufreq_policy *policy)
{
struct cpufreq_frequency_table *table =
cpufreq_frequency_get_table(policy->cpu);
if (!table)
if (!policy->freq_table)
return -ENODEV;
return cpufreq_frequency_table_verify(policy, table);
return cpufreq_frequency_table_verify(policy, policy->freq_table);
}
EXPORT_SYMBOL_GPL(cpufreq_generic_frequency_table_verify);
int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
struct cpufreq_frequency_table *table,
unsigned int target_freq,
unsigned int relation,
unsigned int *index)
unsigned int target_freq,
unsigned int relation)
{
struct cpufreq_frequency_table optimal = {
.driver_data = ~0,
@@ -132,7 +126,9 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
.frequency = 0,
};
struct cpufreq_frequency_table *pos;
struct cpufreq_frequency_table *table = policy->freq_table;
unsigned int freq, diff, i = 0;
int index;
pr_debug("request for target %u kHz (relation: %u) for cpu %u\n",
target_freq, relation, policy->cpu);
@@ -196,25 +192,26 @@ int cpufreq_frequency_table_target(struct cpufreq_policy *policy,
}
}
if (optimal.driver_data > i) {
if (suboptimal.driver_data > i)
return -EINVAL;
*index = suboptimal.driver_data;
if (suboptimal.driver_data > i) {
WARN(1, "Invalid frequency table: %d\n", policy->cpu);
return 0;
}
index = suboptimal.driver_data;
} else
*index = optimal.driver_data;
index = optimal.driver_data;
pr_debug("target index is %u, freq is:%u kHz\n", *index,
table[*index].frequency);
return 0;
pr_debug("target index is %u, freq is:%u kHz\n", index,
table[index].frequency);
return index;
}
EXPORT_SYMBOL_GPL(cpufreq_frequency_table_target);
int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
unsigned int freq)
{
struct cpufreq_frequency_table *pos, *table;
struct cpufreq_frequency_table *pos, *table = policy->freq_table;
table = cpufreq_frequency_get_table(policy->cpu);
if (unlikely(!table)) {
pr_debug("%s: Unable to find frequency table\n", __func__);
return -ENOENT;

5
drivers/cpufreq/powernv-cpufreq.c
View File

@@ -760,9 +760,8 @@ void powernv_cpufreq_work_fn(struct work_struct *work)
struct cpufreq_policy policy;
cpufreq_get_policy(&policy, cpu);
cpufreq_frequency_table_target(&policy, policy.freq_table,
policy.cur,
CPUFREQ_RELATION_C, &index);
index = cpufreq_frequency_table_target(&policy, policy.cur,
CPUFREQ_RELATION_C);
powernv_cpufreq_target_index(&policy, index);
cpumask_andnot(&mask, &mask, policy.cpus);
}

3
drivers/cpufreq/ppc_cbe_cpufreq_pmi.c
View File

@@ -94,7 +94,7 @@ static int pmi_notifier(struct notifier_block *nb,
unsigned long event, void *data)
{
struct cpufreq_policy *policy = data;
struct cpufreq_frequency_table *cbe_freqs;
struct cpufreq_frequency_table *cbe_freqs = policy->freq_table;
u8 node;
/* Should this really be called for CPUFREQ_ADJUST and CPUFREQ_NOTIFY
@@ -103,7 +103,6 @@ static int pmi_notifier(struct notifier_block *nb,
if (event == CPUFREQ_START)
return 0;
cbe_freqs = cpufreq_frequency_get_table(policy->cpu);
node = cbe_cpu_to_node(policy->cpu);
pr_debug("got notified, event=%lu, node=%u\n", event, node);

33
drivers/cpufreq/s3c24xx-cpufreq.c
View File

@@ -293,12 +293,8 @@ static int s3c_cpufreq_target(struct cpufreq_policy *policy,
__func__, policy, target_freq, relation);
if (ftab) {
if (cpufreq_frequency_table_target(policy, ftab,
target_freq, relation,
&index)) {
s3c_freq_dbg("%s: table failed\n", __func__);
return -EINVAL;
}
index = cpufreq_frequency_table_target(policy, target_freq,
relation);
s3c_freq_dbg("%s: adjust %d to entry %d (%u)\n", __func__,
target_freq, index, ftab[index].frequency);
@@ -315,7 +311,6 @@ static int s3c_cpufreq_target(struct cpufreq_policy *policy,
pll = NULL;
} else {
struct cpufreq_policy tmp_policy;
int ret;
/* we keep the cpu pll table in Hz, to ensure we get an
* accurate value for the PLL output. */
@@ -323,20 +318,14 @@ static int s3c_cpufreq_target(struct cpufreq_policy *policy,
tmp_policy.min = policy->min * 1000;
tmp_policy.max = policy->max * 1000;
tmp_policy.cpu = policy->cpu;
tmp_policy.freq_table = pll_reg;
/* cpufreq_frequency_table_target uses a pointer to 'index'
* which is the number of the table entry, not the value of
/* cpufreq_frequency_table_target returns the index
* of the table entry, not the value of
* the table entry's index field. */
ret = cpufreq_frequency_table_target(&tmp_policy, pll_reg,
target_freq, relation,
&index);
if (ret < 0) {
pr_err("%s: no PLL available\n", __func__);
goto err_notpossible;
}
index = cpufreq_frequency_table_target(&tmp_policy, target_freq,
relation);
pll = pll_reg + index;
s3c_freq_dbg("%s: target %u => %u\n",
@@ -346,10 +335,6 @@ static int s3c_cpufreq_target(struct cpufreq_policy *policy,
}
return s3c_cpufreq_settarget(policy, target_freq, pll);
err_notpossible:
pr_err("no compatible settings for %d\n", target_freq);
return -EINVAL;
}
struct clk *s3c_cpufreq_clk_get(struct device *dev, const char *name)
@@ -571,11 +556,7 @@ static int s3c_cpufreq_build_freq(void)
{
int size, ret;
if (!cpu_cur.info->calc_freqtable)
return -EINVAL;
kfree(ftab);
ftab = NULL;
size = cpu_cur.info->calc_freqtable(&cpu_cur, NULL, 0);
size++;

8
drivers/cpufreq/s5pv210-cpufreq.c
View File

@@ -246,12 +246,8 @@ static int s5pv210_target(struct cpufreq_policy *policy, unsigned int index)
new_freq = s5pv210_freq_table[index].frequency;
/* Finding current running level index */
if (cpufreq_frequency_table_target(policy, s5pv210_freq_table,
old_freq, CPUFREQ_RELATION_H,
&priv_index)) {
ret = -EINVAL;
goto exit;
}
priv_index = cpufreq_frequency_table_target(policy, old_freq,
CPUFREQ_RELATION_H);
arm_volt = dvs_conf[index].arm_volt;
int_volt = dvs_conf[index].int_volt;