3  *  linux/drivers/cpufreq/cpufreq.c
18 #include <linux/cpufreq.h>
55  * The "cpufreq driver" - the arch- or hardware-dependent low
56  * level driver of CPUFreq support, and its spinlock. This lock
69 /* Flag to suspend/resume CPUFreq governors */
172  * This is a generic cpufreq init() routine which can be used by cpufreq
225  * Call cpufreq_cpu_get_raw() to obtain a cpufreq policy for @cpu and increment
240 	/* get the cpufreq driver */  in cpufreq_cpu_get()
257  * cpufreq_cpu_put - Decrement kobject usage counter for cpufreq policy.
258  * @policy: cpufreq policy returned by cpufreq_cpu_get().
306  * @policy: cpufreq policy to enable fast frequency switching for.
334 		 * which is not equal to what the cpufreq core thinks is  in cpufreq_notify_transition()
338 			pr_debug("Warning: CPU frequency is %u, cpufreq assumed %u kHz\n",  in cpufreq_notify_transition()
384 	 * ASYNC_NOTIFICATION drivers are left out because the cpufreq core  in cpufreq_freq_transition_begin()
456  * @policy: cpufreq policy to enable fast frequency switching for.
487  * @policy: cpufreq policy to disable fast frequency switching for.
590 	pr_debug("%s: cpufreq BOOST %s\n",  in store_boost()
711  * print out cpufreq information
858  * show_scaling_driver - show the cpufreq driver currently loaded
866  * show_scaling_available_governors - show the available CPUfreq governors
955  * show_bios_limit - show the current cpufreq HW/BIOS limitation
998 ATTRIBUTE_GROUPS(cpufreq);
1064 	if (sysfs_create_link(&dev->kobj, &policy->kobj, "cpufreq"))  in add_cpu_dev_symlink()
1065 		dev_err(dev, "cpufreq symlink creation failed\n");  in add_cpu_dev_symlink()
1072 	sysfs_remove_link(&dev->kobj, "cpufreq");  in remove_cpu_dev_symlink()
1426 		 * Call driver. From then on the cpufreq must be able  in cpufreq_policy_online()
1497 	 * frequency table present with cpufreq core. In such cases CPU might be  in cpufreq_policy_online()
1500 	 * freq-table. This also makes cpufreq stats inconsistent as  in cpufreq_policy_online()
1501 	 * cpufreq-stats would fail to register because current frequency of CPU  in cpufreq_policy_online()
1622 	/* Register cpufreq cooling only for a new policy */  in cpufreq_online()
1647  * cpufreq_add_dev - the cpufreq interface for a CPU device.
1742  * Removes the cpufreq interface for a CPU device.
1762 		 * Unregister cpufreq cooling once all the CPUs of the policy  in cpufreq_remove_dev()
1791 	pr_debug("Warning: CPU frequency out of sync: cpufreq and timing core thinks of %u, is %u kHz\n",  in cpufreq_out_of_sync()
1928 	.name		= "cpufreq",
1961  * cpufreq_suspend() - Suspend CPUFreq governors.
1997  * cpufreq_resume() - Resume CPUFreq governors.
2037  * cpufreq_driver_test_flags - Test cpufreq driver's flags against given ones.
2038  * @flags: Flags to test against the current cpufreq driver's flags.
2051  * Return the name string of the currently registered cpufreq driver or NULL if
2066  * Return the private data of the currently registered cpufreq driver, or NULL
2067  * if no cpufreq driver has been registered.
2083  * cpufreq_register_notifier - Register a notifier with cpufreq.
2089  * of notifiers that ron on cpufreq policy changes.
2129  * cpufreq_unregister_notifier - Unregister a notifier from cpufreq.
2133  * Remove a notifier from one of the cpufreq notifier lists.
2175  * @policy: cpufreq policy to switch the frequency for.
2224  * @policy: cpufreq policy object of the target CPU.
2571  * cpufreq_update_pressure() - Update cpufreq pressure for CPUs
2572  * @policy: cpufreq policy of the CPUs.
2574  * Update the value of cpufreq pressure for all @cpus in the policy.
2588 	 * the cpufreq pressure value.  in cpufreq_update_pressure()
2603  * cpufreq_set_policy - Modify cpufreq policy parameters.
2608  * Invoke the cpufreq driver's ->verify() callback to sanity-check the frequency
2736  * cpufreq_update_policy - Re-evaluate an existing cpufreq policy.
2739  * Update the current frequency for the cpufreq policy of @cpu and use
2741  * evaluation of policy notifiers and the cpufreq driver's ->verify() callback
2862  *               REGISTER / UNREGISTER CPUFREQ DRIVER                *
2899 	 * The cpufreq core depends heavily on the availability of device  in cpufreq_register_driver()
2942 		pr_debug("cpufreq: supports frequency invariance\n");  in cpufreq_register_driver()
2958 						   "cpufreq:online",  in cpufreq_register_driver()
2986  * cpufreq_unregister_driver - unregister the current CPUFreq driver
2988  * Unregister the current CPUFreq driver. Only call this if you have
3028 		cpufreq_global_kobject = kobject_create_and_add("cpufreq", &dev_root->kobj);  in cpufreq_core_init()
3043 		pr_debug("cpufreq policy not set for CPU: %d\n", cpu);  in cpufreq_policy_is_good_for_eas()