kernel/irq/pm.c

16 bool irq_pm_check_wakeup(struct irq_desc *desc)
18 	if (irqd_is_wakeup_armed(&desc->irq_data)) {
19 		irqd_clear(&desc->irq_data, IRQD_WAKEUP_ARMED);
20 		desc->istate |= IRQS_SUSPENDED | IRQS_PENDING;
21 		desc->depth++;
22 		irq_disable(desc);
23 		pm_system_irq_wakeup(irq_desc_get_irq(desc));
30  * Called from __setup_irq() with desc->lock held after @action has
33 void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action)
35 	desc->nr_actions++;
38 		desc->force_resume_depth++;
40 	WARN_ON_ONCE(desc->force_resume_depth &&
41 		     desc->force_resume_depth != desc->nr_actions);
44 		desc->no_suspend_depth++;
46 		desc->cond_suspend_depth++;
48 	WARN_ON_ONCE(desc->no_suspend_depth &&
49 		     (desc->no_suspend_depth +
50 			desc->cond_suspend_depth) != desc->nr_actions);
54  * Called from __free_irq() with desc->lock held after @action has
57 void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action)
59 	desc->nr_actions--;
62 		desc->force_resume_depth--;
65 		desc->no_suspend_depth--;
67 		desc->cond_suspend_depth--;
70 static bool suspend_device_irq(struct irq_desc *desc)
72 	unsigned long chipflags = irq_desc_get_chip(desc)->flags;
73 	struct irq_data *irqd = &desc->irq_data;
75 	if (!desc->action || irq_desc_is_chained(desc) ||
76 	    desc->no_suspend_depth)
89 			__enable_irq(desc);
101 	desc->istate |= IRQS_SUSPENDED;
102 	__disable_irq(desc);
111 		mask_irq(desc);
133 	struct irq_desc *desc;
136 	for_each_irq_desc(irq, desc) {
140 		if (irq_settings_is_nested_thread(desc))
142 		raw_spin_lock_irqsave(&desc->lock, flags);
143 		sync = suspend_device_irq(desc);
144 		raw_spin_unlock_irqrestore(&desc->lock, flags);
151 static void resume_irq(struct irq_desc *desc)
153 	struct irq_data *irqd = &desc->irq_data;
163 		__disable_irq(desc);
167 	if (desc->istate & IRQS_SUSPENDED)
171 	if (!desc->force_resume_depth)
175 	desc->depth++;
176 	irq_state_set_disabled(desc);
177 	irq_state_set_masked(desc);
179 	desc->istate &= ~IRQS_SUSPENDED;
180 	__enable_irq(desc);
185 	struct irq_desc *desc;
188 	for_each_irq_desc(irq, desc) {
190 		bool is_early = desc->action &&
191 			desc->action->flags & IRQF_EARLY_RESUME;
195 		if (irq_settings_is_nested_thread(desc))
198 		raw_spin_lock_irqsave(&desc->lock, flags);
199 		resume_irq(desc);
200 		raw_spin_unlock_irqrestore(&desc->lock, flags);
211 	struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
213 	if (!desc)
216 	if (!(desc->istate & IRQS_SUSPENDED) ||
217 	    !irqd_is_wakeup_set(&desc->irq_data))
220 	desc->istate &= ~IRQS_SUSPENDED;
221 	irqd_set(&desc->irq_data, IRQD_WAKEUP_ARMED);
222 	__enable_irq(desc);
225 	irq_put_desc_busunlock(desc, flags);