1 CPU cooling APIs How To
2 ===================================
4 Written by Amit Daniel Kachhap <amit.kachhap@linaro.org>
8 Copyright (c) 2012 Samsung Electronics Co., Ltd(http://www.samsung.com)
12 The generic cpu cooling(freq clipping) provides registration/unregistration APIs
13 to the caller. The binding of the cooling devices to the trip point is left for
14 the user. The registration APIs returns the cooling device pointer.
18 1.1 cpufreq registration/unregistration APIs
19 1.1.1 struct thermal_cooling_device *cpufreq_cooling_register(
20 struct cpumask *clip_cpus)
22 This interface function registers the cpufreq cooling device with the name
23 "thermal-cpufreq-%x". This api can support multiple instances of cpufreq
26 clip_cpus: cpumask of cpus where the frequency constraints will happen.
28 1.1.2 struct thermal_cooling_device *of_cpufreq_cooling_register(
29 struct device_node *np, const struct cpumask *clip_cpus)
31 This interface function registers the cpufreq cooling device with
32 the name "thermal-cpufreq-%x" linking it with a device tree node, in
33 order to bind it via the thermal DT code. This api can support multiple
34 instances of cpufreq cooling devices.
36 np: pointer to the cooling device device tree node
37 clip_cpus: cpumask of cpus where the frequency constraints will happen.
39 1.1.3 void cpufreq_cooling_unregister(struct thermal_cooling_device *cdev)
41 This interface function unregisters the "thermal-cpufreq-%x" cooling device.
43 cdev: Cooling device pointer which has to be unregistered.