/*
|
* arch/arm/mach-orion5x/irq.c
|
*
|
* Core IRQ functions for Marvell Orion System On Chip
|
*
|
* Maintainer: Tzachi Perelstein <tzachi@marvell.com>
|
*
|
* 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/gpio.h>
|
#include <linux/kernel.h>
|
#include <linux/irq.h>
|
#include <linux/io.h>
|
#include <plat/orion-gpio.h>
|
#include <plat/irq.h>
|
#include <asm/exception.h>
|
#include "bridge-regs.h"
|
#include "common.h"
|
|
static int __initdata gpio0_irqs[4] = {
|
IRQ_ORION5X_GPIO_0_7,
|
IRQ_ORION5X_GPIO_8_15,
|
IRQ_ORION5X_GPIO_16_23,
|
IRQ_ORION5X_GPIO_24_31,
|
};
|
|
static asmlinkage void
|
__exception_irq_entry orion5x_legacy_handle_irq(struct pt_regs *regs)
|
{
|
u32 stat;
|
|
stat = readl_relaxed(MAIN_IRQ_CAUSE);
|
stat &= readl_relaxed(MAIN_IRQ_MASK);
|
if (stat) {
|
unsigned int hwirq = 1 + __fls(stat);
|
handle_IRQ(hwirq, regs);
|
return;
|
}
|
}
|
|
void __init orion5x_init_irq(void)
|
{
|
orion_irq_init(1, MAIN_IRQ_MASK);
|
|
set_handle_irq(orion5x_legacy_handle_irq);
|
|
/*
|
* Initialize gpiolib for GPIOs 0-31.
|
*/
|
orion_gpio_init(NULL, 0, 32, GPIO_VIRT_BASE, 0,
|
IRQ_ORION5X_GPIO_START, gpio0_irqs);
|
}
|
