1
0
mirror of git://projects.qi-hardware.com/openwrt-xburst.git synced 2024-12-12 03:26:15 +02:00
openwrt-xburst/target/linux/mcs814x/files-3.3/arch/arm/mach-mcs814x/irq.c
florian 08b17128a1 [mcs814x] use the recommended ARM I/O accessors
use {read,write}l_relaxed instead of the plain __raw_{read,write}l variants.

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@33330 3c298f89-4303-0410-b956-a3cf2f4a3e73
2012-09-08 09:51:05 +00:00

70 lines
1.6 KiB
C

/*
* Moschip MCS814x generic interrupt controller routines
*
* Copyright (C) 2012, Florian Fainelli <florian@openwrt.org>
*
* Licensed under the GPLv2
*/
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/irqdomain.h>
#include <asm/exception.h>
#include <asm/mach/irq.h>
#include <mach/mcs814x.h>
void __iomem *mcs814x_intc_base;
static void __init mcs814x_alloc_gc(void __iomem *base, unsigned int irq_start,
unsigned int num)
{
struct irq_chip_generic *gc;
struct irq_chip_type *ct;
gc = irq_alloc_generic_chip("mcs814x-intc", 1,
irq_start, base, handle_level_irq);
if (!gc)
panic("unable to allocate generic irq chip");
ct = gc->chip_types;
ct->chip.irq_ack = irq_gc_unmask_enable_reg;
ct->chip.irq_mask = irq_gc_mask_clr_bit;
ct->chip.irq_unmask = irq_gc_mask_set_bit;
ct->regs.mask = MCS814X_IRQ_MASK;
ct->regs.enable = MCS814X_IRQ_ICR;
irq_setup_generic_chip(gc, IRQ_MSK(num), IRQ_GC_INIT_MASK_CACHE,
IRQ_NOREQUEST, 0);
/* Clear all interrupts */
writel_relaxed(0xffffffff, base + MCS814X_IRQ_ICR);
}
static const struct of_device_id mcs814x_intc_ids[] = {
{ .compatible = "moschip,mcs814x-intc" },
{ /* sentinel */ },
};
void __init mcs814x_of_irq_init(void)
{
struct device_node *np;
np = of_find_matching_node(NULL, mcs814x_intc_ids);
if (!np)
panic("unable to find compatible intc node in dtb\n");
mcs814x_intc_base = of_iomap(np, 0);
if (!mcs814x_intc_base)
panic("unable to map intc cpu registers\n");
irq_domain_add_simple(np, 0);
of_node_put(np);
mcs814x_alloc_gc(mcs814x_intc_base, 0, 32);
}