Commit 683c66bf authored by Andrew Victor's avatar Andrew Victor Committed by Russell King

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

Patch from Andrew Victor

Added suspend/resume/set_wake support for the AT91RM9200's AIC interrupt
controller.
Signed-off-by: default avatarAndrew Victor <andrew@sanpeople.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 37f2e4bc
...@@ -118,11 +118,47 @@ static int at91rm9200_irq_type(unsigned irq, unsigned type) ...@@ -118,11 +118,47 @@ static int at91rm9200_irq_type(unsigned irq, unsigned type)
return 0; 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 = { static struct irqchip at91rm9200_irq_chip = {
.ack = at91rm9200_mask_irq, .ack = at91rm9200_mask_irq,
.mask = at91rm9200_mask_irq, .mask = at91rm9200_mask_irq,
.unmask = at91rm9200_unmask_irq, .unmask = at91rm9200_unmask_irq,
.set_type = at91rm9200_irq_type, .set_type = at91rm9200_irq_type,
.set_wake = at91rm9200_irq_set_wake,
}; };
/* /*
......
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