Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

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

[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

arch/arm/common/vic.c

+10 −1
Original line number Diff line number Diff line
@@ -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,