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[ARM] 3583/1: AT91RM9200 IRQ suspend/resume support

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Patch from Andrew Victor

Added suspend/resume/set_wake support for the AT91RM9200's AIC interrupt
controller.

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Andrew Victor 2006-06-19 15:26:53 +01:00 committed by Russell King
parent 37f2e4bc12
commit 683c66bf75
1 changed files with 36 additions and 0 deletions
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36
arch/arm/mach-at91rm9200/irq.c
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@ -118,11 +118,47 @@ static int at91rm9200_irq_type(unsigned irq, unsigned type)
return 0;
}
#ifdef CONFIG_PM
static u32 wakeups;
static u32 backups;
static int at91rm9200_irq_set_wake(unsigned irq, unsigned value)
{
if (unlikely(irq >= 32))
return -EINVAL;
if (value)
wakeups |= (1 << irq);
else
wakeups &= ~(1 << irq);
return 0;
}
void at91_irq_suspend(void)
{
backups = at91_sys_read(AT91_AIC_IMR);
at91_sys_write(AT91_AIC_IDCR, backups);
at91_sys_write(AT91_AIC_IECR, wakeups);
}
void at91_irq_resume(void)
{
at91_sys_write(AT91_AIC_IDCR, wakeups);
at91_sys_write(AT91_AIC_IECR, backups);
}
#else
#define at91rm9200_irq_set_wake NULL
#endif
static struct irqchip at91rm9200_irq_chip = {
.ack = at91rm9200_mask_irq,
.mask = at91rm9200_mask_irq,
.unmask = at91rm9200_unmask_irq,
.set_type = at91rm9200_irq_type,
.set_wake = at91rm9200_irq_set_wake,
};
/*