1 // SPDX-License-Identifier: GPL-2.0-only
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()
22 	struct dev_pm_opp *opp, *p_opp;  in devfreq_passive_get_target_freq()  local
30 	if (p_data->get_target_freq)  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()
35 	 * get the next frequency by using 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()
44 	 * need to get the index of new frequency on OPP table of parent  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()
50 		return -EINVAL;  in devfreq_passive_get_target_freq()
53 	 * The passive governor have to get the correct frequency from OPP  in devfreq_passive_get_target_freq()
57 	if (devfreq->opp_table && parent_devfreq->opp_table) {  in devfreq_passive_get_target_freq()
58 		p_opp = devfreq_recommended_opp(parent_devfreq->dev.parent,  in devfreq_passive_get_target_freq()
63 		opp = dev_pm_opp_xlate_required_opp(parent_devfreq->opp_table,  in devfreq_passive_get_target_freq()
64 						    devfreq->opp_table, p_opp);  in devfreq_passive_get_target_freq()
67 		if (IS_ERR(opp))  in devfreq_passive_get_target_freq()
70 		*freq = dev_pm_opp_get_freq(opp);  in devfreq_passive_get_target_freq()
71 		dev_pm_opp_put(opp);  in devfreq_passive_get_target_freq()
78 	 * Get the OPP table's index of decided frequency by governor  in devfreq_passive_get_target_freq()
81 	for (i = 0; i < parent_devfreq->profile->max_state; i++)  in devfreq_passive_get_target_freq()
82 		if (parent_devfreq->profile->freq_table[i] == *freq)  in devfreq_passive_get_target_freq()
85 	if (i == parent_devfreq->profile->max_state)  in devfreq_passive_get_target_freq()
86 		return -EINVAL;  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()
108 	struct devfreq *parent = (struct devfreq *)data->parent;  in devfreq_passive_notifier_call()
110 	unsigned long freq = freqs->new;  in devfreq_passive_notifier_call()
113 	mutex_lock_nested(&devfreq->lock, SINGLE_DEPTH_NESTING);  in devfreq_passive_notifier_call()
116 		if (parent->previous_freq > freq)  in devfreq_passive_notifier_call()
121 		if (parent->previous_freq < 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()
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()
140 	struct notifier_block *nb = &p_data->nb;  in devfreq_passive_event_handler()
144 		return -EPROBE_DEFER;  in devfreq_passive_event_handler()
148 		if (!p_data->this)  in devfreq_passive_event_handler()
149 			p_data->this = devfreq;  in devfreq_passive_event_handler()
151 		nb->notifier_call = devfreq_passive_notifier_call;  in devfreq_passive_event_handler()