diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index d7efdfe0c12cba32f6232dc162b6641d07af3504..08ca8c9f41cdeb27f6e4bb4879b2912798e1a72e 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -352,6 +352,33 @@ EXPORT_SYMBOL_GPL(cpufreq_notify_post_transition);
/*********************************************************************
* SYSFS INTERFACE *
*********************************************************************/
+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)
{
@@ -2183,6 +2210,73 @@ static struct notifier_block __refdata cpufreq_cpu_notifier = {
.notifier_call = cpufreq_cpu_callback,
};
+/*********************************************************************
+ * BOOST *
+ *********************************************************************/
+static int cpufreq_boost_set_sw(int state)
+{
+ struct cpufreq_frequency_table *freq_table;
+ struct cpufreq_policy *policy;
+ int ret = -EINVAL;
+
+ list_for_each_entry(policy, &cpufreq_policy_list, policy_list) {
+ 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;
+ }
+ policy->user_policy.max = policy->max;
+ __cpufreq_governor(policy, CPUFREQ_GOV_LIMITS);
+ }
+ }
+
+ 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;
+}
+
+int cpufreq_boost_supported(void)
+{
+ if (likely(cpufreq_driver))
+ return cpufreq_driver->boost_supported;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(cpufreq_boost_supported);
+
+int cpufreq_boost_enabled(void)
+{
+ return cpufreq_driver->boost_enabled;
+}
+EXPORT_SYMBOL_GPL(cpufreq_boost_enabled);
+
/*********************************************************************
* REGISTER / UNREGISTER CPUFREQ DRIVER *
*********************************************************************/
@@ -2223,9 +2317,25 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
cpufreq_driver = driver_data;
write_unlock_irqrestore(&cpufreq_driver_lock, flags);
+ if (cpufreq_boost_supported()) {
+ /*
+ * Check if driver provides function to enable boost -
+ * if not, use cpufreq_boost_set_sw as default
+ */
+ if (!cpufreq_driver->set_boost)
+ cpufreq_driver->set_boost = cpufreq_boost_set_sw;
+
+ ret = cpufreq_sysfs_create_file(&boost.attr);
+ if (ret) {
+ pr_err("%s: cannot register global BOOST sysfs file\n",
+ __func__);
+ goto err_null_driver;
+ }
+ }
+
ret = subsys_interface_register(&cpufreq_interface);
if (ret)
- goto err_null_driver;
+ goto err_boost_unreg;
if (!(cpufreq_driver->flags & CPUFREQ_STICKY)) {
int i;
@@ -2252,6 +2362,9 @@ int cpufreq_register_driver(struct cpufreq_driver *driver_data)
return 0;
err_if_unreg:
subsys_interface_unregister(&cpufreq_interface);
+err_boost_unreg:
+ if (cpufreq_boost_supported())
+ cpufreq_sysfs_remove_file(&boost.attr);
err_null_driver:
write_lock_irqsave(&cpufreq_driver_lock, flags);
cpufreq_driver = NULL;
@@ -2278,6 +2391,9 @@ int cpufreq_unregister_driver(struct cpufreq_driver *driver)
pr_debug("unregistering driver %s\n", driver->name);
subsys_interface_unregister(&cpufreq_interface);
+ if (cpufreq_boost_supported())
+ cpufreq_sysfs_remove_file(&boost.attr);
+
unregister_hotcpu_notifier(&cpufreq_cpu_notifier);
down_write(&cpufreq_rwsem);
diff --git a/drivers/cpufreq/freq_table.c b/drivers/cpufreq/freq_table.c
index a8ac0427fbfeb215f00de7a645b69c5e6d51bf63..8e54f97899ba6feb7225275b7ddf2473ff8dc35b 100644
--- a/drivers/cpufreq/freq_table.c
+++ b/drivers/cpufreq/freq_table.c
@@ -32,6 +32,10 @@ int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy,
continue;
}
+ if (!cpufreq_boost_enabled()
+ && table[i].driver_data == CPUFREQ_BOOST_FREQ)
+ continue;
+
pr_debug("table entry %u: %u kHz, %u driver_data\n",
i, freq, table[i].driver_data);
if (freq < min_freq)
@@ -204,7 +208,8 @@ static DEFINE_PER_CPU(struct cpufreq_frequency_table *, cpufreq_show_table);
/**
* show_available_freqs - show available frequencies for the specified CPU
*/
-static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf)
+static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf,
+ bool show_boost)
{
unsigned int i = 0;
unsigned int cpu = policy->cpu;
@@ -219,6 +224,20 @@ static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf)
for (i = 0; (table[i].frequency != CPUFREQ_TABLE_END); i++) {
if (table[i].frequency == CPUFREQ_ENTRY_INVALID)
continue;
+ /*
+ * show_boost = true and driver_data = BOOST freq
+ * display BOOST freqs
+ *
+ * show_boost = false and driver_data = BOOST freq
+ * show_boost = true and driver_data != BOOST freq
+ * continue - do not display anything
+ *
+ * show_boost = false and driver_data != BOOST freq
+ * display NON BOOST freqs
+ */
+ if (show_boost ^ (table[i].driver_data == CPUFREQ_BOOST_FREQ))
+ continue;
+
count += sprintf(&buf[count], "%d ", table[i].frequency);
}
count += sprintf(&buf[count], "\n");
@@ -227,16 +246,39 @@ static ssize_t show_available_freqs(struct cpufreq_policy *policy, char *buf)
}
-struct freq_attr cpufreq_freq_attr_scaling_available_freqs = {
- .attr = { .name = "scaling_available_frequencies",
- .mode = 0444,
- },
- .show = show_available_freqs,
-};
+#define cpufreq_attr_available_freq(_name) \
+struct freq_attr cpufreq_freq_attr_##_name##_freqs = \
+__ATTR_RO(_name##_frequencies)
+
+/**
+ * show_scaling_available_frequencies - show available normal frequencies for
+ * the specified CPU
+ */
+static ssize_t scaling_available_frequencies_show(struct cpufreq_policy *policy,
+ char *buf)
+{
+ return show_available_freqs(policy, buf, false);
+}
+cpufreq_attr_available_freq(scaling_available);
EXPORT_SYMBOL_GPL(cpufreq_freq_attr_scaling_available_freqs);
+/**
+ * show_available_boost_freqs - show available boost frequencies for
+ * the specified CPU
+ */
+static ssize_t scaling_boost_frequencies_show(struct cpufreq_policy *policy,
+ char *buf)
+{
+ return show_available_freqs(policy, buf, true);
+}
+cpufreq_attr_available_freq(scaling_boost);
+EXPORT_SYMBOL_GPL(cpufreq_freq_attr_scaling_boost_freqs);
+
struct freq_attr *cpufreq_generic_attr[] = {
&cpufreq_freq_attr_scaling_available_freqs,
+#ifdef CONFIG_CPU_FREQ_BOOST_SW
+ &cpufreq_freq_attr_scaling_boost_freqs,
+#endif
NULL,
};
EXPORT_SYMBOL_GPL(cpufreq_generic_attr);
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 422f10561e0b4a3884890cf8280f0f9040e51885..4d89e0e6f9ccaa641dd2a6b2c35c8c7b7bbf2916 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -227,6 +227,11 @@ struct cpufreq_driver {
int (*suspend) (struct cpufreq_policy *policy);
int (*resume) (struct cpufreq_policy *policy);
struct freq_attr **attr;
+
+ /* platform specific boost support code */
+ bool boost_supported;
+ bool boost_enabled;
+ int (*set_boost) (int state);
};
/* flags */
@@ -435,6 +440,7 @@ extern struct cpufreq_governor cpufreq_gov_conservative;
#define CPUFREQ_ENTRY_INVALID ~0
#define CPUFREQ_TABLE_END ~1
+#define CPUFREQ_BOOST_FREQ ~2
struct cpufreq_frequency_table {
unsigned int driver_data; /* driver specific data, not used by core */
@@ -460,6 +466,24 @@ int cpufreq_frequency_table_get_index(struct cpufreq_policy *policy,
void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy);
ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf);
+#ifdef CONFIG_CPU_FREQ
+int cpufreq_boost_trigger_state(int state);
+int cpufreq_boost_supported(void);
+int cpufreq_boost_enabled(void);
+#else
+static inline int cpufreq_boost_trigger_state(int state)
+{
+ return 0;
+}
+static inline int cpufreq_boost_supported(void)
+{
+ return 0;
+}
+static inline int cpufreq_boost_enabled(void)
+{
+ return 0;
+}
+#endif
/* the following funtion is for cpufreq core use only */
struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu);