summary refs log tree commit diff
path: root/drivers/cpufreq/cpufreq.c
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2009-03-26 11:04:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-03-26 11:04:08 -0700
commitada19a31a90b4f46c040c25ef4ef8ffc203c7fc6 (patch)
tree7d523d2d90dbaa973c5843d6219ec149b5949243 /drivers/cpufreq/cpufreq.c
parent8d80ce80e1d58ba9cd3e3972b112cccd6b4008f4 (diff)
parent36e8abf3edcd2d207193ec5741d1a2a645d470a5 (diff)
downloadlinux-ada19a31a90b4f46c040c25ef4ef8ffc203c7fc6.tar.gz
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: (35 commits)
  [CPUFREQ] Prevent p4-clockmod from auto-binding to the ondemand governor.
  [CPUFREQ] Make cpufreq-nforce2 less obnoxious
  [CPUFREQ] p4-clockmod reports wrong frequency.
  [CPUFREQ] powernow-k8: Use a common exit path.
  [CPUFREQ] Change link order of x86 cpufreq modules
  [CPUFREQ] conservative: remove 10x from def_sampling_rate
  [CPUFREQ] conservative: fixup governor to function more like ondemand logic
  [CPUFREQ] conservative: fix dbs_cpufreq_notifier so freq is not locked
  [CPUFREQ] conservative: amend author's email address
  [CPUFREQ] Use swap() in longhaul.c
  [CPUFREQ] checkpatch cleanups for acpi-cpufreq
  [CPUFREQ] powernow-k8: Only print error message once, not per core.
  [CPUFREQ] ondemand/conservative: sanitize sampling_rate restrictions
  [CPUFREQ] ondemand/conservative: deprecate sampling_rate{min,max}
  [CPUFREQ] powernow-k8: Always compile powernow-k8 driver with ACPI support
  [CPUFREQ] Introduce /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_transition_latency
  [CPUFREQ] checkpatch cleanups for powernow-k8
  [CPUFREQ] checkpatch cleanups for ondemand governor.
  [CPUFREQ] checkpatch cleanups for powernow-k7
  [CPUFREQ] checkpatch cleanups for speedstep related drivers.
  ...
Diffstat (limited to 'drivers/cpufreq/cpufreq.c')
-rw-r--r--drivers/cpufreq/cpufreq.c55
1 files changed, 29 insertions, 26 deletions
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index d6daf3c507d3..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);
@@ -853,10 +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 */
@@ -1127,8 +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)
@@ -1610,7 +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.
  */