mirror of https://gitee.com/openkylin/linux.git
Merge branches 'pm-cpuidle' and 'pm-opp'
* pm-cpuidle: PM: cpuidle: Fix cpuidle_poll_state_init() prototype Documentation/ABI: update cpuidle sysfs documentation * pm-opp: opp: cpu: Replace GFP_ATOMIC with GFP_KERNEL in dev_pm_opp_init_cpufreq_table
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@ -108,6 +108,8 @@ Description: CPU topology files that describe a logical CPU's relationship
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What: /sys/devices/system/cpu/cpuidle/current_driver
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/sys/devices/system/cpu/cpuidle/current_governer_ro
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/sys/devices/system/cpu/cpuidle/available_governors
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/sys/devices/system/cpu/cpuidle/current_governor
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Date: September 2007
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Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
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Description: Discover cpuidle policy and mechanism
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@ -119,13 +121,84 @@ Description: Discover cpuidle policy and mechanism
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Idle policy (governor) is differentiated from idle mechanism
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(driver)
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current_driver: displays current idle mechanism
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current_driver: (RO) displays current idle mechanism
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current_governor_ro: displays current idle policy
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current_governor_ro: (RO) displays current idle policy
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With the cpuidle_sysfs_switch boot option enabled (meant for
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developer testing), the following three attributes are visible
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instead:
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current_driver: same as described above
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available_governors: (RO) displays a space separated list of
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available governors
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current_governor: (RW) displays current idle policy. Users can
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switch the governor at runtime by writing to this file.
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See files in Documentation/cpuidle/ for more information.
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What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/name
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/sys/devices/system/cpu/cpuX/cpuidle/stateN/latency
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/sys/devices/system/cpu/cpuX/cpuidle/stateN/power
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/sys/devices/system/cpu/cpuX/cpuidle/stateN/time
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/sys/devices/system/cpu/cpuX/cpuidle/stateN/usage
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Date: September 2007
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KernelVersion: v2.6.24
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Contact: Linux power management list <linux-pm@vger.kernel.org>
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Description:
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The directory /sys/devices/system/cpu/cpuX/cpuidle contains per
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logical CPU specific cpuidle information for each online cpu X.
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The processor idle states which are available for use have the
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following attributes:
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name: (RO) Name of the idle state (string).
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latency: (RO) The latency to exit out of this idle state (in
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microseconds).
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power: (RO) The power consumed while in this idle state (in
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milliwatts).
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time: (RO) The total time spent in this idle state (in microseconds).
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usage: (RO) Number of times this state was entered (a count).
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What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/desc
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Date: February 2008
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KernelVersion: v2.6.25
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Contact: Linux power management list <linux-pm@vger.kernel.org>
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Description:
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(RO) A small description about the idle state (string).
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What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/disable
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Date: March 2012
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KernelVersion: v3.10
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Contact: Linux power management list <linux-pm@vger.kernel.org>
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Description:
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(RW) Option to disable this idle state (bool). The behavior and
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the effect of the disable variable depends on the implementation
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of a particular governor. In the ladder governor, for example,
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it is not coherent, i.e. if one is disabling a light state, then
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all deeper states are disabled as well, but the disable variable
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does not reflect it. Likewise, if one enables a deep state but a
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lighter state still is disabled, then this has no effect.
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What: /sys/devices/system/cpu/cpuX/cpuidle/stateN/residency
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Date: March 2014
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KernelVersion: v3.15
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Contact: Linux power management list <linux-pm@vger.kernel.org>
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Description:
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(RO) Display the target residency i.e. the minimum amount of
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time (in microseconds) this cpu should spend in this idle state
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to make the transition worth the effort.
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What: /sys/devices/system/cpu/cpu#/cpufreq/*
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Date: pre-git history
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Contact: linux-pm@vger.kernel.org
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@ -55,7 +55,7 @@ int dev_pm_opp_init_cpufreq_table(struct device *dev,
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if (max_opps <= 0)
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return max_opps ? max_opps : -ENODATA;
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freq_table = kcalloc((max_opps + 1), sizeof(*freq_table), GFP_ATOMIC);
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freq_table = kcalloc((max_opps + 1), sizeof(*freq_table), GFP_KERNEL);
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if (!freq_table)
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return -ENOMEM;
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@ -225,7 +225,7 @@ static inline void cpuidle_coupled_parallel_barrier(struct cpuidle_device *dev,
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}
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#endif
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#ifdef CONFIG_ARCH_HAS_CPU_RELAX
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#if defined(CONFIG_CPU_IDLE) && defined(CONFIG_ARCH_HAS_CPU_RELAX)
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void cpuidle_poll_state_init(struct cpuidle_driver *drv);
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#else
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static inline void cpuidle_poll_state_init(struct cpuidle_driver *drv) {}
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