drivers/thermal/cpufreq_cooling.c

29  * Cooling state <-> CPUFreq frequency
31  * Cooling states are translated to frequencies throughout this driver and this
34  * Highest cooling state corresponds to lowest possible frequency.
53  * struct cpufreq_cooling_device - data for cooling device with cpufreq
56  *	cooling	devices.
57  * @max_level: maximum cooling level. One less than total number of valid
61  * @cooling_ops: cpufreq callbacks to thermal cooling device ops
250  * @state:	cooling device state to be converted
253  * Convert cooling device state @state into power consumption in
257  * Return: 0 on success, -EINVAL if the cooling device state is bigger
280  * cpufreq_power2state() - convert power to a cooling device state
285  * Calculate a cooling device state for the cpus described by @cdev
289  * as input can yield different cooling device states depending on those
330 …pr_err("The number of performance states in pd %*pbl (%u) doesn't match the number of cooling leve…  in em_is_sane()
394 /* cpufreq cooling device callback functions are defined below */
397  * cpufreq_get_max_state - callback function to get the max cooling state.
398  * @cdev: thermal cooling device pointer.
399  * @state: fill this variable with the max cooling state.
401  * Callback for the thermal cooling device to return the cpufreq
402  * max cooling state.
416  * cpufreq_get_cur_state - callback function to get the current cooling state.
417  * @cdev: thermal cooling device pointer.
418  * @state: fill this variable with the current cooling state.
420  * Callback for the thermal cooling device to return the cpufreq
421  * current cooling state.
436  * cpufreq_set_cur_state - callback function to set the current cooling state.
437  * @cdev: thermal cooling device pointer.
438  * @state: set this variable to the current cooling state.
440  * Callback for the thermal cooling device to change the cpufreq
441  * current cooling state.
457 	/* Check if the old cooling action is same as new cooling action */  in cpufreq_set_cur_state()
475  * __cpufreq_cooling_register - helper function to create cpufreq cooling device
476  * @np: a valid struct device_node to the cooling device tree node
481  * This interface function registers the cpufreq cooling device with the name
483  * cooling devices. It also gives the opportunity to link the cooling device
589  * cpufreq_cooling_register - function to create cpufreq cooling device.
592  * This interface function registers the cpufreq cooling device with the name
593  * "cpufreq-%s". This API can support multiple instances of cpufreq cooling
607  * of_cpufreq_cooling_register - function to create cpufreq cooling device.
610  * This interface function registers the cpufreq cooling device with the name
611  * "cpufreq-%s". This API can support multiple instances of cpufreq cooling
612  * devices. Using this API, the cpufreq cooling device will be linked to the
615  * Using this function, the cooling device will implement the power
634 	if (of_property_present(np, "#cooling-cells")) {  in of_cpufreq_cooling_register()
639 			pr_err("cpufreq_cooling: cpu%d failed to register as cooling device: %ld\n",  in of_cpufreq_cooling_register()
651  * cpufreq_cooling_unregister - function to remove cpufreq cooling device.
652  * @cdev: thermal cooling device pointer.
654  * This interface function unregisters the "cpufreq-%x" cooling device.