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

[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

arch/arm/mach-at91rm9200/irq.c

+36 −0
Original line number Diff line number Diff line
@@ -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,

};



/*