linux/arch/arm/plat-orion/irq.c
Thomas Gleixner e59347a1d1 arm: orion: Use generic irq chip
The core interrupt chip is a straight forward conversion. The gpio
chip is implemented with two instances of the irq_chip_type which can
be switched with the irq_set_type function. That allows us to use the
generic callbacks and avoids the conditionals in them.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
2011-05-16 14:34:54 -04:00

34 lines
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C

/*
* arch/arm/plat-orion/irq.c
*
* Marvell Orion SoC IRQ handling.
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <plat/irq.h>
void __init orion_irq_init(unsigned int irq_start, void __iomem *maskaddr)
{
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
/*
* Mask all interrupts initially.
*/
writel(0, maskaddr);
gc = irq_alloc_generic_chip("orion_irq", 1, irq_start, maskaddr,
handle_level_irq);
ct = gc->chip_types;
ct->chip.irq_mask = irq_gc_mask_clr_bit;
ct->chip.irq_unmask = irq_gc_mask_set_bit;
irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_MASK_CACHE,
IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
}