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| author | Alessandro Rubini <rubini@gnudd.com> | 2009-07-02 15:28:52 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-07-02 21:20:44 +0100 |
| commit | 8c81b52422147b4b09f5adb8d0c6963342a336c6 (patch) | |
| tree | f4cf43c1353c5dfd29e68c64e8efe85368251052 /arch/arm/common | |
| parent | 87e8824b4588076409692b82ef4b1d98f25cd400 (diff) | |
| download | linux-8c81b52422147b4b09f5adb8d0c6963342a336c6.tar.gz linux-8c81b52422147b4b09f5adb8d0c6963342a336c6.tar.bz2 linux-8c81b52422147b4b09f5adb8d0c6963342a336c6.zip | |
[ARM] 5583/1: VIC: acknowledge software interrupts
The PrimeCell Vectored Interrupt Controller offers a way to trigger
any interrupt through software. This is a useful tool for developing,
but such software interrupt can only be acked by writing a bit in the
"software clear" register, or the handler will loop forever. This
splits ack from mask, and acks the soft irq in case it was the source.
Signed-off-by: Alessandro Rubini <rubini@unipv.it>
Acked-by: Andrea Gallo <andrea.gallo@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/common')
| -rw-r--r-- | arch/arm/common/vic.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/arm/common/vic.c b/arch/arm/common/vic.c index 27714ab30f25..bc1f9ad61ff6 100644 --- a/arch/arm/common/vic.c +++ b/arch/arm/common/vic.c @@ -26,6 +26,15 @@ #include <asm/mach/irq.h> #include <asm/hardware/vic.h> +static void vic_ack_irq(unsigned int irq) +{ + void __iomem *base = get_irq_chip_data(irq); + irq &= 31; + writel(1 << irq, base + VIC_INT_ENABLE_CLEAR); + /* moreover, clear the soft-triggered, in case it was the reason */ + writel(1 << irq, base + VIC_INT_SOFT_CLEAR); +} + static void vic_mask_irq(unsigned int irq) { void __iomem *base = get_irq_chip_data(irq); @@ -253,7 +262,7 @@ static inline void vic_pm_register(void __iomem *base, unsigned int irq, u32 arg static struct irq_chip vic_chip = { .name = "VIC", - .ack = vic_mask_irq, + .ack = vic_ack_irq, .mask = vic_mask_irq, .unmask = vic_unmask_irq, .set_wake = vic_set_wake, |