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author | David S. Miller <davem@davemloft.net> | 2009-03-26 23:23:24 +0100 |
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committer | David S. Miller <davem@davemloft.net> | 2009-03-26 23:23:24 +0100 |
commit | 08abe18af1f78ee80c3c3a5ac47c3e0ae0beadf6 (patch) | |
tree | 2be39bf8942edca1bcec735145e144a682ca9cd3 /drivers/cpufreq/cpufreq.c | |
parent | Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/ne... (diff) | |
parent | Merge branch 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/gi... (diff) | |
download | linux-08abe18af1f78ee80c3c3a5ac47c3e0ae0beadf6.tar.xz linux-08abe18af1f78ee80c3c3a5ac47c3e0ae0beadf6.zip |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Conflicts:
drivers/net/wimax/i2400m/usb-notif.c
Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
-rw-r--r-- | drivers/cpufreq/cpufreq.c | 106 |
1 files changed, 47 insertions, 59 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index b55cb67435bd..d270e8eb3e67 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -104,7 +104,8 @@ EXPORT_SYMBOL_GPL(unlock_policy_rwsem_write); /* internal prototypes */ -static int __cpufreq_governor(struct cpufreq_policy *policy, unsigned int event); +static int __cpufreq_governor(struct cpufreq_policy *policy, + unsigned int event); static unsigned int __cpufreq_get(unsigned int cpu); static void handle_update(struct work_struct *work); @@ -128,7 +129,7 @@ static int __init init_cpufreq_transition_notifier_list(void) pure_initcall(init_cpufreq_transition_notifier_list); static LIST_HEAD(cpufreq_governor_list); -static DEFINE_MUTEX (cpufreq_governor_mutex); +static DEFINE_MUTEX(cpufreq_governor_mutex); struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu) { @@ -371,7 +372,7 @@ static struct cpufreq_governor *__find_governor(const char *str_governor) struct cpufreq_governor *t; list_for_each_entry(t, &cpufreq_governor_list, governor_list) - if (!strnicmp(str_governor,t->name,CPUFREQ_NAME_LEN)) + if (!strnicmp(str_governor, t->name, CPUFREQ_NAME_LEN)) return t; return NULL; @@ -429,15 +430,11 @@ static int cpufreq_parse_governor(char *str_governor, unsigned int *policy, mutex_unlock(&cpufreq_governor_mutex); } - out: +out: return err; } -/* drivers/base/cpu.c */ -extern struct sysdev_class cpu_sysdev_class; - - /** * cpufreq_per_cpu_attr_read() / show_##file_name() - * print out cpufreq information @@ -450,11 +447,12 @@ extern struct sysdev_class cpu_sysdev_class; static ssize_t show_##file_name \ (struct cpufreq_policy *policy, char *buf) \ { \ - return sprintf (buf, "%u\n", policy->object); \ + 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); show_one(scaling_cur_freq, cur); @@ -476,7 +474,7 @@ static ssize_t store_##file_name \ if (ret) \ return -EINVAL; \ \ - ret = sscanf (buf, "%u", &new_policy.object); \ + ret = sscanf(buf, "%u", &new_policy.object); \ if (ret != 1) \ return -EINVAL; \ \ @@ -486,8 +484,8 @@ static ssize_t store_##file_name \ return ret ? ret : count; \ } -store_one(scaling_min_freq,min); -store_one(scaling_max_freq,max); +store_one(scaling_min_freq, min); +store_one(scaling_max_freq, max); /** * show_cpuinfo_cur_freq - current CPU frequency as detected by hardware @@ -507,12 +505,13 @@ static ssize_t show_cpuinfo_cur_freq(struct cpufreq_policy *policy, */ static ssize_t show_scaling_governor(struct cpufreq_policy *policy, char *buf) { - if(policy->policy == CPUFREQ_POLICY_POWERSAVE) + 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_LEN, "%s\n", policy->governor->name); + return scnprintf(buf, CPUFREQ_NAME_LEN, "%s\n", + policy->governor->name); return -EINVAL; } @@ -531,7 +530,7 @@ static ssize_t store_scaling_governor(struct cpufreq_policy *policy, if (ret) return ret; - ret = sscanf (buf, "%15s", str_governor); + ret = sscanf(buf, "%15s", str_governor); if (ret != 1) return -EINVAL; @@ -575,7 +574,8 @@ static ssize_t show_scaling_available_governors(struct cpufreq_policy *policy, } list_for_each_entry(t, &cpufreq_governor_list, governor_list) { - if (i >= (ssize_t) ((PAGE_SIZE / sizeof(char)) - (CPUFREQ_NAME_LEN + 2))) + if (i >= (ssize_t) ((PAGE_SIZE / sizeof(char)) + - (CPUFREQ_NAME_LEN + 2))) goto out; i += scnprintf(&buf[i], CPUFREQ_NAME_LEN, "%s ", t->name); } @@ -594,7 +594,7 @@ static ssize_t show_cpus(const struct cpumask *mask, char *buf) i += scnprintf(&buf[i], (PAGE_SIZE - i - 2), " "); i += scnprintf(&buf[i], (PAGE_SIZE - i - 2), "%u", cpu); if (i >= (PAGE_SIZE - 5)) - break; + break; } i += sprintf(&buf[i], "\n"); return i; @@ -660,6 +660,7 @@ __ATTR(_name, 0644, show_##_name, store_##_name) define_one_ro0400(cpuinfo_cur_freq); define_one_ro(cpuinfo_min_freq); define_one_ro(cpuinfo_max_freq); +define_one_ro(cpuinfo_transition_latency); define_one_ro(scaling_available_governors); define_one_ro(scaling_driver); define_one_ro(scaling_cur_freq); @@ -673,6 +674,7 @@ define_one_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, @@ -684,10 +686,10 @@ static struct attribute *default_attrs[] = { NULL }; -#define to_policy(k) container_of(k,struct cpufreq_policy,kobj) -#define to_attr(a) container_of(a,struct freq_attr,attr) +#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) +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); @@ -754,11 +756,6 @@ static struct kobj_type ktype_cpufreq = { .release = cpufreq_sysfs_release, }; -static struct kobj_type ktype_empty_cpufreq = { - .sysfs_ops = &sysfs_ops, - .release = cpufreq_sysfs_release, -}; - /** * cpufreq_add_dev - add a CPU device @@ -858,10 +855,10 @@ static int cpufreq_add_dev(struct sys_device *sys_dev) if (cpu == j) continue; - /* check for existing affected CPUs. They may not be aware - * of it due to CPU Hotplug. + /* Check for existing affected CPUs. + * They may not be aware of it due to CPU Hotplug. */ - managed_policy = cpufreq_cpu_get(j); // FIXME: Where is this released? What about error paths? + managed_policy = cpufreq_cpu_get(j); /* FIXME: Where is this released? What about error paths? */ if (unlikely(managed_policy)) { /* Set proper policy_cpu */ @@ -892,36 +889,26 @@ static int cpufreq_add_dev(struct sys_device *sys_dev) memcpy(&new_policy, policy, sizeof(struct cpufreq_policy)); /* prepare interface data */ - if (!cpufreq_driver->hide_interface) { - ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq, - &sys_dev->kobj, "cpufreq"); + ret = kobject_init_and_add(&policy->kobj, &ktype_cpufreq, &sys_dev->kobj, + "cpufreq"); + if (ret) + goto err_out_driver_exit; + + /* 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) goto err_out_driver_exit; - - /* 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) - goto err_out_driver_exit; - drv_attr++; - } - if (cpufreq_driver->get) { - ret = sysfs_create_file(&policy->kobj, - &cpuinfo_cur_freq.attr); - if (ret) - goto err_out_driver_exit; - } - if (cpufreq_driver->target) { - ret = sysfs_create_file(&policy->kobj, - &scaling_cur_freq.attr); - if (ret) - goto err_out_driver_exit; - } - } else { - ret = kobject_init_and_add(&policy->kobj, &ktype_empty_cpufreq, - &sys_dev->kobj, "cpufreq"); + drv_attr++; + } + if (cpufreq_driver->get) { + ret = sysfs_create_file(&policy->kobj, &cpuinfo_cur_freq.attr); + if (ret) + goto err_out_driver_exit; + } + if (cpufreq_driver->target) { + ret = sysfs_create_file(&policy->kobj, &scaling_cur_freq.attr); if (ret) goto err_out_driver_exit; } @@ -1142,8 +1129,8 @@ static void handle_update(struct work_struct *work) * @old_freq: CPU frequency the kernel thinks the CPU runs at * @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()). + * 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(unsigned int cpu, unsigned int old_freq, unsigned int new_freq) @@ -1625,7 +1612,8 @@ EXPORT_SYMBOL_GPL(cpufreq_unregister_governor); /** * cpufreq_get_policy - get the current cpufreq_policy - * @policy: struct cpufreq_policy into which the current cpufreq_policy is written + * @policy: struct cpufreq_policy into which the current cpufreq_policy + * is written * * Reads the current cpufreq policy. */ |