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 		ret = p_data->get_target_freq(devfreq, freq);  in devfreq_passive_get_target_freq()
36 	 * If the parent and passive devfreq device uses the OPP table,  in devfreq_passive_get_target_freq()
41 	 * - parent devfreq device uses the governors except for passive.  in devfreq_passive_get_target_freq()
42 	 * - passive devfreq device uses the passive governor.  in devfreq_passive_get_target_freq()
44 	 * Each devfreq has the OPP table. After deciding the new frequency  in devfreq_passive_get_target_freq()
45 	 * from the governor of parent devfreq device, the passive governor  in devfreq_passive_get_target_freq()
48 	 * new frequency for passive devfreq device.  in devfreq_passive_get_target_freq()
50 	if (!devfreq->profile || !devfreq->profile->freq_table  in devfreq_passive_get_target_freq()
51 		|| devfreq->profile->max_state <= 0)  in devfreq_passive_get_target_freq()
81 	if (i < devfreq->profile->max_state) {  in devfreq_passive_get_target_freq()
82 		child_freq = devfreq->profile->freq_table[i];  in devfreq_passive_get_target_freq()
84 		count = devfreq->profile->max_state;  in devfreq_passive_get_target_freq()
85 		child_freq = devfreq->profile->freq_table[count - 1];  in devfreq_passive_get_target_freq()
95 static int update_devfreq_passive(struct devfreq *devfreq, unsigned long freq)  in update_devfreq_passive()  argument
99 	if (!devfreq->governor)  in update_devfreq_passive()
102 	mutex_lock_nested(&devfreq->lock, SINGLE_DEPTH_NESTING);  in update_devfreq_passive()
104 	ret = devfreq->governor->get_target_freq(devfreq, &freq);  in update_devfreq_passive()
108 	ret = devfreq->profile->target(devfreq->dev.parent, &freq, 0);  in update_devfreq_passive()
112 	if (devfreq->profile->freq_table  in update_devfreq_passive()
113 		&& (devfreq_update_status(devfreq, freq)))  in update_devfreq_passive()
114 		dev_err(&devfreq->dev,  in update_devfreq_passive()
117 	devfreq->previous_freq = freq;  in update_devfreq_passive()
120 	mutex_unlock(&devfreq->lock);  in update_devfreq_passive()
130 	struct devfreq *devfreq = (struct devfreq *)data->this;  in devfreq_passive_notifier_call()  local
131 	struct devfreq *parent = (struct devfreq *)data->parent;  in devfreq_passive_notifier_call()
138 			update_devfreq_passive(devfreq, freq);  in devfreq_passive_notifier_call()
142 			update_devfreq_passive(devfreq, freq);  in devfreq_passive_notifier_call()
149 static int devfreq_passive_event_handler(struct devfreq *devfreq,  in devfreq_passive_event_handler()  argument
153 			= (struct devfreq_passive_data *)devfreq->data;  in devfreq_passive_event_handler()
154 	struct devfreq *parent = (struct devfreq *)p_data->parent;  in devfreq_passive_event_handler()
164 			p_data->this = devfreq;  in devfreq_passive_event_handler()
206 MODULE_DESCRIPTION("DEVFREQ Passive governor");