107  * @tz: thermal zone we are operating in
116 static u32 estimate_sustainable_power(struct thermal_zone_device *tz)  in estimate_sustainable_power()  argument
118 	struct power_allocator_params *params = tz->governor_data;  in estimate_sustainable_power()
141  * @tz:		thermal zone for which to estimate the constants
149 static void estimate_pid_constants(struct thermal_zone_device *tz,  in estimate_pid_constants()  argument
171 	tz->tzp->k_po = int_to_frac(sustainable_power) /  in estimate_pid_constants()
174 	tz->tzp->k_pu = int_to_frac(2 * sustainable_power) /  in estimate_pid_constants()
177 	k_i = tz->tzp->k_pu / 10;  in estimate_pid_constants()
178 	tz->tzp->k_i = k_i > 0 ? k_i : 1;  in estimate_pid_constants()
188  * @tz:		thermal zone for which to estimate the constants
197 static u32 get_sustainable_power(struct thermal_zone_device *tz,  in get_sustainable_power()  argument
203 	if (!tz->tzp->sustainable_power)  in get_sustainable_power()
204 		sustainable_power = estimate_sustainable_power(tz);  in get_sustainable_power()
206 		sustainable_power = tz->tzp->sustainable_power;  in get_sustainable_power()
210 		estimate_pid_constants(tz, sustainable_power,  in get_sustainable_power()
214 		tz->tzp->sustainable_power = sustainable_power;  in get_sustainable_power()
223  * @tz:	thermal zone we are operating in
239 static u32 pid_controller(struct thermal_zone_device *tz,  in pid_controller()  argument
243 	struct power_allocator_params *params = tz->governor_data;  in pid_controller()
250 	sustainable_power = get_sustainable_power(tz, params, control_temp);  in pid_controller()
252 	err = control_temp - tz->temperature;  in pid_controller()
256 	p = mul_frac(err < 0 ? tz->tzp->k_po : tz->tzp->k_pu, err);  in pid_controller()
264 	i = mul_frac(tz->tzp->k_i, params->err_integral);  in pid_controller()
266 	if (err < int_to_frac(tz->tzp->integral_cutoff)) {  in pid_controller()
267 		s64 i_next = i + mul_frac(tz->tzp->k_i, err);  in pid_controller()
282 	d = mul_frac(tz->tzp->k_d, err - params->prev_err);  in pid_controller()
283 	d = div_frac(d, jiffies_to_msecs(tz->passive_delay_jiffies));  in pid_controller()
293 	trace_thermal_power_allocator_pid(tz, frac_to_int(err),  in pid_controller()
406 static void allocate_power(struct thermal_zone_device *tz, int control_temp)  in allocate_power()  argument
408 	struct power_allocator_params *params = tz->governor_data;  in allocate_power()
458 	power_range = pid_controller(tz, control_temp, max_allocatable_power);  in allocate_power()
474 		trace_thermal_power_actor(tz, i, pa->req_power,  in allocate_power()
479 	trace_thermal_power_allocator(tz, total_req_power, total_granted_power,  in allocate_power()
481 				      max_allocatable_power, tz->temperature,  in allocate_power()
482 				      control_temp - tz->temperature);  in allocate_power()
487  * @tz:	thermal zone to operate on
500 static void get_governor_trips(struct thermal_zone_device *tz,  in get_governor_trips()  argument
508 	for_each_trip_desc(tz, td) {  in get_governor_trips()
545 static void allow_maximum_power(struct thermal_zone_device *tz)  in allow_maximum_power()  argument
547 	struct power_allocator_params *params = tz->governor_data;  in allow_maximum_power()
577  * @tz:		thermal zone to operate on
580  * Check all cooling devices in the @tz and warn every time they are missing
584  * If all of the cooling devices currently attached to @tz implement the power
588 static int check_power_actors(struct thermal_zone_device *tz,  in check_power_actors()  argument
602 			dev_warn(&tz->device, "power_allocator: %s is not a power actor\n",  in check_power_actors()
660 static void power_allocator_update_tz(struct thermal_zone_device *tz,  in power_allocator_update_tz()  argument
663 	struct power_allocator_params *params = tz->governor_data;  in power_allocator_update_tz()
689  * @tz:	thermal zone to bind it to
695  * when there are unsupported cooling devices in the @tz.
697 static int power_allocator_bind(struct thermal_zone_device *tz)  in power_allocator_bind()  argument
706 	get_governor_trips(tz, params);  in power_allocator_bind()
708 	ret = check_power_actors(tz, params);  in power_allocator_bind()
710 		dev_warn(&tz->device, "power_allocator: binding failed\n");  in power_allocator_bind()
717 		dev_warn(&tz->device, "power_allocator: allocation failed\n");  in power_allocator_bind()
722 	if (!tz->tzp) {  in power_allocator_bind()
723 		tz->tzp = kzalloc(sizeof(*tz->tzp), GFP_KERNEL);  in power_allocator_bind()
724 		if (!tz->tzp) {  in power_allocator_bind()
732 	if (!tz->tzp->sustainable_power)  in power_allocator_bind()
733 		dev_warn(&tz->device, "power_allocator: sustainable_power will be estimated\n");  in power_allocator_bind()
735 		params->sustainable_power = tz->tzp->sustainable_power;  in power_allocator_bind()
738 		estimate_pid_constants(tz, tz->tzp->sustainable_power,  in power_allocator_bind()
744 	tz->governor_data = params;  in power_allocator_bind()
757 static void power_allocator_unbind(struct thermal_zone_device *tz)  in power_allocator_unbind()  argument
759 	struct power_allocator_params *params = tz->governor_data;  in power_allocator_unbind()
761 	dev_dbg(&tz->device, "Unbinding from thermal zone %d\n", tz->id);  in power_allocator_unbind()
764 		kfree(tz->tzp);  in power_allocator_unbind()
765 		tz->tzp = NULL;  in power_allocator_unbind()
769 	kfree(tz->governor_data);  in power_allocator_unbind()
770 	tz->governor_data = NULL;  in power_allocator_unbind()
773 static void power_allocator_manage(struct thermal_zone_device *tz)  in power_allocator_manage()  argument
775 	struct power_allocator_params *params = tz->governor_data;  in power_allocator_manage()
778 	lockdep_assert_held(&tz->lock);  in power_allocator_manage()
780 	if (trip && tz->temperature < trip->temperature) {  in power_allocator_manage()
782 		allow_maximum_power(tz);  in power_allocator_manage()
790 	allocate_power(tz, params->trip_max->temperature);  in power_allocator_manage()