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authorAndrew Victor <andrew@sanpeople.com>2006-06-19 15:26:53 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2006-06-19 15:26:53 +0100
commit683c66bf75ce277b90d658da0c1a0bf1a55cce4c (patch)
tree962a3d92b8eba3424df5642e5a02e66220876281 /arch
parent37f2e4bc120bd784e7f69f961233e1c16b74d170 (diff)
[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: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/mach-at91rm9200/irq.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/mach-at91rm9200/irq.c b/arch/arm/mach-at91rm9200/irq.c
index cc545b2c438..70f4d7ac153 100644
--- a/arch/arm/mach-at91rm9200/irq.c
+++ b/arch/arm/mach-at91rm9200/irq.c
@@ -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,
};
/*