3  * linux/drivers/devfreq/governor_passive.c
16 #include <linux/devfreq.h>
77 static int get_target_freq_with_cpufreq(struct devfreq *devfreq,  in get_target_freq_with_cpufreq()  argument
81 				(struct devfreq_passive_data *)devfreq->data;  in get_target_freq_with_cpufreq()
106 					devfreq->opp_table, &cpu_cur);  in get_target_freq_with_cpufreq()
114 		devfreq_get_freq_range(devfreq, &dev_min, &dev_max);  in get_target_freq_with_cpufreq()
130 static int get_target_freq_with_devfreq(struct devfreq *devfreq,  in get_target_freq_with_devfreq()  argument
134 			= (struct devfreq_passive_data *)devfreq->data;  in get_target_freq_with_devfreq()
135 	struct devfreq *parent_devfreq = (struct devfreq *)p_data->parent;  in get_target_freq_with_devfreq()
142 						devfreq->opp_table, freq);  in get_target_freq_with_devfreq()
154 	if (i < devfreq->max_state) {  in get_target_freq_with_devfreq()
155 		child_freq = devfreq->freq_table[i];  in get_target_freq_with_devfreq()
157 		count = devfreq->max_state;  in get_target_freq_with_devfreq()
158 		child_freq = devfreq->freq_table[count - 1];  in get_target_freq_with_devfreq()
167 static int devfreq_passive_get_target_freq(struct devfreq *devfreq,  in devfreq_passive_get_target_freq()  argument
171 				(struct devfreq_passive_data *)devfreq->data;  in devfreq_passive_get_target_freq()
178 	 * If the devfreq device with passive governor has the specific method  in devfreq_passive_get_target_freq()
183 		return p_data->get_target_freq(devfreq, freq);  in devfreq_passive_get_target_freq()
187 		ret = get_target_freq_with_devfreq(devfreq, freq);  in devfreq_passive_get_target_freq()
190 		ret = get_target_freq_with_cpufreq(devfreq, freq);  in devfreq_passive_get_target_freq()
194 		dev_err(&devfreq->dev, "Invalid parent type\n");  in devfreq_passive_get_target_freq()
206 	struct devfreq *devfreq = (struct devfreq *)p_data->this;  in cpufreq_passive_notifier_call()  local
222 	mutex_lock(&devfreq->lock);  in cpufreq_passive_notifier_call()
223 	ret = devfreq_update_target(devfreq, freqs->new);  in cpufreq_passive_notifier_call()
224 	mutex_unlock(&devfreq->lock);  in cpufreq_passive_notifier_call()
227 		dev_err(&devfreq->dev, "failed to update the frequency.\n");  in cpufreq_passive_notifier_call()
234 static int cpufreq_passive_unregister_notifier(struct devfreq *devfreq)  in cpufreq_passive_unregister_notifier()  argument
237 			= (struct devfreq_passive_data *)devfreq->data;  in cpufreq_passive_unregister_notifier()
252 static int cpufreq_passive_register_notifier(struct devfreq *devfreq)  in cpufreq_passive_register_notifier()  argument
255 			= (struct devfreq_passive_data *)devfreq->data;  in cpufreq_passive_register_notifier()
256 	struct device *dev = devfreq->dev.parent;  in cpufreq_passive_register_notifier()
320 	mutex_lock(&devfreq->lock);  in cpufreq_passive_register_notifier()
321 	ret = devfreq_update_target(devfreq, 0L);  in cpufreq_passive_register_notifier()
322 	mutex_unlock(&devfreq->lock);  in cpufreq_passive_register_notifier()
342 	struct devfreq *devfreq = (struct devfreq *)data->this;  in devfreq_passive_notifier_call()  local
343 	struct devfreq *parent = (struct devfreq *)data->parent;  in devfreq_passive_notifier_call()
348 	mutex_lock_nested(&devfreq->lock, SINGLE_DEPTH_NESTING);  in devfreq_passive_notifier_call()
352 			ret = devfreq_update_target(devfreq, freq);  in devfreq_passive_notifier_call()
357 			ret = devfreq_update_target(devfreq, freq);  in devfreq_passive_notifier_call()
360 	mutex_unlock(&devfreq->lock);  in devfreq_passive_notifier_call()
363 		dev_warn(&devfreq->dev,  in devfreq_passive_notifier_call()
364 			"failed to update devfreq using passive governor\n");  in devfreq_passive_notifier_call()
369 static int devfreq_passive_unregister_notifier(struct devfreq *devfreq)  in devfreq_passive_unregister_notifier()  argument
372 			= (struct devfreq_passive_data *)devfreq->data;  in devfreq_passive_unregister_notifier()
373 	struct devfreq *parent = (struct devfreq *)p_data->parent;  in devfreq_passive_unregister_notifier()
379 static int devfreq_passive_register_notifier(struct devfreq *devfreq)  in devfreq_passive_register_notifier()  argument
382 			= (struct devfreq_passive_data *)devfreq->data;  in devfreq_passive_register_notifier()
383 	struct devfreq *parent = (struct devfreq *)p_data->parent;  in devfreq_passive_register_notifier()
393 static int devfreq_passive_event_handler(struct devfreq *devfreq,  in devfreq_passive_event_handler()  argument
397 			= (struct devfreq_passive_data *)devfreq->data;  in devfreq_passive_event_handler()
403 	p_data->this = devfreq;  in devfreq_passive_event_handler()
408 			ret = devfreq_passive_register_notifier(devfreq);  in devfreq_passive_event_handler()
410 			ret = cpufreq_passive_register_notifier(devfreq);  in devfreq_passive_event_handler()
414 			WARN_ON(devfreq_passive_unregister_notifier(devfreq));  in devfreq_passive_event_handler()
416 			WARN_ON(cpufreq_passive_unregister_notifier(devfreq));  in devfreq_passive_event_handler()
450 MODULE_DESCRIPTION("DEVFREQ Passive governor");