3  * linux/drivers/devfreq/governor_passive.c
12 #include <linux/devfreq.h>
15 static int devfreq_passive_get_target_freq(struct devfreq *devfreq,  in devfreq_passive_get_target_freq()  argument
19 			= (struct devfreq_passive_data *)devfreq->data;  in devfreq_passive_get_target_freq()
20 	struct devfreq *parent_devfreq = (struct devfreq *)p_data->parent;  in devfreq_passive_get_target_freq()
26 	 * If the devfreq device with passive governor has the specific method  in devfreq_passive_get_target_freq()
31 		return p_data->get_target_freq(devfreq, freq);  in devfreq_passive_get_target_freq()
34 	 * If the parent and passive devfreq device uses the OPP table,  in devfreq_passive_get_target_freq()
39 	 * - parent devfreq device uses the governors except for passive.  in devfreq_passive_get_target_freq()
40 	 * - passive devfreq device uses the passive governor.  in devfreq_passive_get_target_freq()
42 	 * Each devfreq has the OPP table. After deciding the new frequency  in devfreq_passive_get_target_freq()
43 	 * from the governor of parent devfreq device, the passive governor  in devfreq_passive_get_target_freq()
46 	 * new frequency for passive devfreq device.  in devfreq_passive_get_target_freq()
48 	if (!devfreq->profile || !devfreq->profile->freq_table  in devfreq_passive_get_target_freq()
49 		|| devfreq->profile->max_state <= 0)  in devfreq_passive_get_target_freq()
57 	if (devfreq->opp_table && parent_devfreq->opp_table) {  in devfreq_passive_get_target_freq()
64 						    devfreq->opp_table, p_opp);  in devfreq_passive_get_target_freq()
89 	if (i < devfreq->profile->max_state) {  in devfreq_passive_get_target_freq()
90 		child_freq = devfreq->profile->freq_table[i];  in devfreq_passive_get_target_freq()
92 		count = devfreq->profile->max_state;  in devfreq_passive_get_target_freq()
93 		child_freq = devfreq->profile->freq_table[count - 1];  in devfreq_passive_get_target_freq()
107 	struct devfreq *devfreq = (struct devfreq *)data->this;  in devfreq_passive_notifier_call()  local
108 	struct devfreq *parent = (struct devfreq *)data->parent;  in devfreq_passive_notifier_call()
113 	mutex_lock_nested(&devfreq->lock, SINGLE_DEPTH_NESTING);  in devfreq_passive_notifier_call()
117 			ret = devfreq_update_target(devfreq, freq);  in devfreq_passive_notifier_call()
122 			ret = devfreq_update_target(devfreq, freq);  in devfreq_passive_notifier_call()
125 	mutex_unlock(&devfreq->lock);  in devfreq_passive_notifier_call()
128 		dev_warn(&devfreq->dev,  in devfreq_passive_notifier_call()
129 			"failed to update devfreq using passive governor\n");  in devfreq_passive_notifier_call()
134 static int devfreq_passive_event_handler(struct devfreq *devfreq,  in devfreq_passive_event_handler()  argument
138 			= (struct devfreq_passive_data *)devfreq->data;  in devfreq_passive_event_handler()
139 	struct devfreq *parent = (struct devfreq *)p_data->parent;  in devfreq_passive_event_handler()
149 			p_data->this = devfreq;  in devfreq_passive_event_handler()
191 MODULE_DESCRIPTION("DEVFREQ Passive governor");