Commit 8c81b524 authored by Alessandro Rubini's avatar Alessandro Rubini Committed by Russell King

[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: default avatarAlessandro Rubini <rubini@unipv.it>
Acked-by: default avatarAndrea Gallo <andrea.gallo@stericsson.com>
Acked-by: default avatarLinus Walleij <linus.walleij@stericsson.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 87e8824b
......@@ -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,
......
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