Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright (C) 2009 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * This file contains power management functions related to interrupts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/suspend.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/syscore_ops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include "internals.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) bool irq_pm_check_wakeup(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 	if (irqd_is_wakeup_armed(&desc->irq_data)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 		irqd_clear(&desc->irq_data, IRQD_WAKEUP_ARMED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 		desc->istate |= IRQS_SUSPENDED | IRQS_PENDING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 		desc->depth++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 		irq_disable(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 		pm_system_irq_wakeup(irq_desc_get_irq(desc));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 		return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30)  * Called from __setup_irq() with desc->lock held after @action has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31)  * been installed in the action chain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) void irq_pm_install_action(struct irq_desc *desc, struct irqaction *action)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 	desc->nr_actions++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	if (action->flags & IRQF_FORCE_RESUME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 		desc->force_resume_depth++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	WARN_ON_ONCE(desc->force_resume_depth &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 		     desc->force_resume_depth != desc->nr_actions);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	if (action->flags & IRQF_NO_SUSPEND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		desc->no_suspend_depth++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	else if (action->flags & IRQF_COND_SUSPEND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		desc->cond_suspend_depth++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	WARN_ON_ONCE(desc->no_suspend_depth &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		     (desc->no_suspend_depth +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 			desc->cond_suspend_depth) != desc->nr_actions);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54)  * Called from __free_irq() with desc->lock held after @action has
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)  * been removed from the action chain.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) void irq_pm_remove_action(struct irq_desc *desc, struct irqaction *action)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 	desc->nr_actions--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 	if (action->flags & IRQF_FORCE_RESUME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		desc->force_resume_depth--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	if (action->flags & IRQF_NO_SUSPEND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 		desc->no_suspend_depth--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	else if (action->flags & IRQF_COND_SUSPEND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		desc->cond_suspend_depth--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) static bool suspend_device_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	unsigned long chipflags = irq_desc_get_chip(desc)->flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	struct irq_data *irqd = &desc->irq_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	if (!desc->action || irq_desc_is_chained(desc) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	    desc->no_suspend_depth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	if (irqd_is_wakeup_set(irqd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 		irqd_set(irqd, IRQD_WAKEUP_ARMED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		if ((chipflags & IRQCHIP_ENABLE_WAKEUP_ON_SUSPEND) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 		     irqd_irq_disabled(irqd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 			/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 			 * Interrupt marked for wakeup is in disabled state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 			 * Enable interrupt here to unmask/enable in irqchip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 			 * to be able to resume with such interrupts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 			 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 			__enable_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 			irqd_set(irqd, IRQD_IRQ_ENABLED_ON_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		 * We return true here to force the caller to issue
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 		 * synchronize_irq(). We need to make sure that the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 		 * IRQD_WAKEUP_ARMED is visible before we return from
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 		 * suspend_device_irqs().
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	desc->istate |= IRQS_SUSPENDED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	__disable_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	 * Hardware which has no wakeup source configuration facility
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	 * requires that the non wakeup interrupts are masked at the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	 * chip level. The chip implementation indicates that with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	 * IRQCHIP_MASK_ON_SUSPEND.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	if (chipflags & IRQCHIP_MASK_ON_SUSPEND)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 		mask_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)  * suspend_device_irqs - disable all currently enabled interrupt lines
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)  * During system-wide suspend or hibernation device drivers need to be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)  * prevented from receiving interrupts and this function is provided
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)  * for this purpose.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)  * So we disable all interrupts and mark them IRQS_SUSPENDED except
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)  * for those which are unused, those which are marked as not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)  * suspendable via an interrupt request with the flag IRQF_NO_SUSPEND
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)  * set and those which are marked as active wakeup sources.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)  * The active wakeup sources are handled by the flow handler entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)  * code which checks for the IRQD_WAKEUP_ARMED flag, suspends the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)  * interrupt and notifies the pm core about the wakeup.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) void suspend_device_irqs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	struct irq_desc *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	for_each_irq_desc(irq, desc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		bool sync;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		if (irq_settings_is_nested_thread(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		raw_spin_lock_irqsave(&desc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 		sync = suspend_device_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		raw_spin_unlock_irqrestore(&desc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		if (sync)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 			synchronize_irq(irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) EXPORT_SYMBOL_GPL(suspend_device_irqs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static void resume_irq(struct irq_desc *desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	struct irq_data *irqd = &desc->irq_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	irqd_clear(irqd, IRQD_WAKEUP_ARMED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	if (irqd_is_enabled_on_suspend(irqd)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		 * Interrupt marked for wakeup was enabled during suspend
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 		 * entry. Disable such interrupts to restore them back to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 		 * original state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		__disable_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		irqd_clear(irqd, IRQD_IRQ_ENABLED_ON_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	if (desc->istate & IRQS_SUSPENDED)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		goto resume;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	/* Force resume the interrupt? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	if (!desc->force_resume_depth)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	/* Pretend that it got disabled ! */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	desc->depth++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	irq_state_set_disabled(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	irq_state_set_masked(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) resume:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	desc->istate &= ~IRQS_SUSPENDED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	__enable_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) static void resume_irqs(bool want_early)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	struct irq_desc *desc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	int irq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	for_each_irq_desc(irq, desc) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		bool is_early = desc->action &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 			desc->action->flags & IRQF_EARLY_RESUME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		if (!is_early && want_early)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		if (irq_settings_is_nested_thread(desc))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 			continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		raw_spin_lock_irqsave(&desc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		resume_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		raw_spin_unlock_irqrestore(&desc->lock, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)  * rearm_wake_irq - rearm a wakeup interrupt line after signaling wakeup
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)  * @irq: Interrupt to rearm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) void rearm_wake_irq(unsigned int irq)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	unsigned long flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	struct irq_desc *desc = irq_get_desc_buslock(irq, &flags, IRQ_GET_DESC_CHECK_GLOBAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	if (!desc)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	if (!(desc->istate & IRQS_SUSPENDED) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	    !irqd_is_wakeup_set(&desc->irq_data))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		goto unlock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	desc->istate &= ~IRQS_SUSPENDED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	irqd_set(&desc->irq_data, IRQD_WAKEUP_ARMED);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	__enable_irq(desc);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) unlock:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	irq_put_desc_busunlock(desc, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230)  * irq_pm_syscore_ops - enable interrupt lines early
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232)  * Enable all interrupt lines with %IRQF_EARLY_RESUME set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static void irq_pm_syscore_resume(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	resume_irqs(true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) static struct syscore_ops irq_pm_syscore_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	.resume		= irq_pm_syscore_resume,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) static int __init irq_pm_init_ops(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	register_syscore_ops(&irq_pm_syscore_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) device_initcall(irq_pm_init_ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252)  * resume_device_irqs - enable interrupt lines disabled by suspend_device_irqs()
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)  * Enable all non-%IRQF_EARLY_RESUME interrupt lines previously
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255)  * disabled by suspend_device_irqs() that have the IRQS_SUSPENDED flag
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)  * set as well as those with %IRQF_FORCE_RESUME.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) void resume_device_irqs(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	resume_irqs(false);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) EXPORT_SYMBOL_GPL(resume_device_irqs);