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| author | Andrew Victor <andrew@sanpeople.com> | 2006-06-19 15:26:53 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-06-19 15:26:53 +0100 |
| commit | 683c66bf75ce277b90d658da0c1a0bf1a55cce4c (patch) | |
| tree | 962a3d92b8eba3424df5642e5a02e66220876281 /arch/arm/mach-at91rm9200 | |
| parent | 37f2e4bc120bd784e7f69f961233e1c16b74d170 (diff) | |
| download | linux-683c66bf75ce277b90d658da0c1a0bf1a55cce4c.tar.gz linux-683c66bf75ce277b90d658da0c1a0bf1a55cce4c.tar.bz2 linux-683c66bf75ce277b90d658da0c1a0bf1a55cce4c.zip | |
[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/arm/mach-at91rm9200')
| -rw-r--r-- | arch/arm/mach-at91rm9200/irq.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/arm/mach-at91rm9200/irq.c b/arch/arm/mach-at91rm9200/irq.c index cc545b2c4388..70f4d7ac1533 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, }; /* |