diff options
Diffstat (limited to 'kernel/irq')
| -rw-r--r-- | kernel/irq/generic-chip.c | 4 | ||||
| -rw-r--r-- | kernel/irq/pm.c | 48 |
2 files changed, 45 insertions, 7 deletions
diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c index e38544dddb1..6cb7613e4bf 100644 --- a/kernel/irq/generic-chip.c +++ b/kernel/irq/generic-chip.c @@ -211,6 +211,7 @@ irq_alloc_generic_chip(const char *name, int num_ct, unsigned int irq_base, } return gc; } +EXPORT_SYMBOL_GPL(irq_alloc_generic_chip); /* * Separate lockdep class for interrupt chip which can nest irq_desc @@ -258,6 +259,7 @@ void irq_setup_generic_chip(struct irq_chip_generic *gc, u32 msk, } gc->irq_cnt = i - gc->irq_base; } +EXPORT_SYMBOL_GPL(irq_setup_generic_chip); /** * irq_setup_alt_chip - Switch to alternative chip @@ -281,6 +283,7 @@ int irq_setup_alt_chip(struct irq_data *d, unsigned int type) } return -EINVAL; } +EXPORT_SYMBOL_GPL(irq_setup_alt_chip); /** * irq_remove_generic_chip - Remove a chip @@ -311,6 +314,7 @@ void irq_remove_generic_chip(struct irq_chip_generic *gc, u32 msk, irq_modify_status(i, clr, set); } } +EXPORT_SYMBOL_GPL(irq_remove_generic_chip); #ifdef CONFIG_PM static int irq_gc_suspend(void) diff --git a/kernel/irq/pm.c b/kernel/irq/pm.c index f76fc00c987..15e53b1766a 100644 --- a/kernel/irq/pm.c +++ b/kernel/irq/pm.c @@ -9,6 +9,7 @@ #include <linux/irq.h> #include <linux/module.h> #include <linux/interrupt.h> +#include <linux/syscore_ops.h> #include "internals.h" @@ -39,25 +40,58 @@ void suspend_device_irqs(void) } EXPORT_SYMBOL_GPL(suspend_device_irqs); -/** - * resume_device_irqs - enable interrupt lines disabled by suspend_device_irqs() - * - * Enable all interrupt lines previously disabled by suspend_device_irqs() that - * have the IRQS_SUSPENDED flag set. - */ -void resume_device_irqs(void) +static void resume_irqs(bool want_early) { struct irq_desc *desc; int irq; for_each_irq_desc(irq, desc) { unsigned long flags; + bool is_early = desc->action && + desc->action->flags & IRQF_EARLY_RESUME; + + if (is_early != want_early) + continue; raw_spin_lock_irqsave(&desc->lock, flags); __enable_irq(desc, irq, true); raw_spin_unlock_irqrestore(&desc->lock, flags); } } + +/** + * irq_pm_syscore_ops - enable interrupt lines early + * + * Enable all interrupt lines with %IRQF_EARLY_RESUME set. + */ +static void irq_pm_syscore_resume(void) +{ + resume_irqs(true); +} + +static struct syscore_ops irq_pm_syscore_ops = { + .resume = irq_pm_syscore_resume, +}; + +static int __init irq_pm_init_ops(void) +{ + register_syscore_ops(&irq_pm_syscore_ops); + return 0; +} + +device_initcall(irq_pm_init_ops); + +/** + * resume_device_irqs - enable interrupt lines disabled by suspend_device_irqs() + * + * Enable all non-%IRQF_EARLY_RESUME interrupt lines previously + * disabled by suspend_device_irqs() that have the IRQS_SUSPENDED flag + * set as well as those with %IRQF_FORCE_RESUME. + */ +void resume_device_irqs(void) +{ + resume_irqs(false); +} EXPORT_SYMBOL_GPL(resume_device_irqs); /** |