2022-06-07 07:11:14 -07:00
|
|
|
// SPDX-License-Identifier: GPL-2.0-only
|
2007-10-23 12:14:42 -07:00
|
|
|
/*
|
2008-03-27 11:51:41 -07:00
|
|
|
* arch/arm/mach-orion5x/irq.c
|
2007-10-23 12:14:42 -07:00
|
|
|
*
|
|
|
|
* Core IRQ functions for Marvell Orion System On Chip
|
|
|
|
*
|
|
|
|
* Maintainer: Tzachi Perelstein <tzachi@marvell.com>
|
|
|
|
*/
|
2011-07-26 02:53:52 -07:00
|
|
|
#include <linux/gpio.h>
|
2007-10-23 12:14:42 -07:00
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/irq.h>
|
2012-09-11 05:27:21 -07:00
|
|
|
#include <linux/io.h>
|
2012-08-29 08:16:55 -07:00
|
|
|
#include <plat/orion-gpio.h>
|
2008-08-09 04:44:58 -07:00
|
|
|
#include <plat/irq.h>
|
2014-04-22 14:26:27 -07:00
|
|
|
#include <asm/exception.h>
|
2015-12-02 14:27:08 -07:00
|
|
|
#include "bridge-regs.h"
|
2013-10-23 07:12:51 -07:00
|
|
|
#include "common.h"
|
2007-10-23 12:14:42 -07:00
|
|
|
|
2012-06-27 04:40:04 -07:00
|
|
|
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,
|
|
|
|
};
|
2007-10-23 12:14:42 -07:00
|
|
|
|
2016-06-09 02:59:05 -07:00
|
|
|
static asmlinkage void
|
2014-04-22 14:26:27 -07:00
|
|
|
__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) {
|
2015-07-14 07:25:58 -07:00
|
|
|
unsigned int hwirq = 1 + __fls(stat);
|
2014-04-22 14:26:27 -07:00
|
|
|
handle_IRQ(hwirq, regs);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-10-19 16:51:03 -07:00
|
|
|
void __init orion5x_init_irq(void)
|
2007-10-23 12:14:42 -07:00
|
|
|
{
|
2015-07-14 07:25:58 -07:00
|
|
|
orion_irq_init(1, MAIN_IRQ_MASK);
|
2007-10-23 12:14:42 -07:00
|
|
|
|
2014-04-22 14:26:27 -07:00
|
|
|
set_handle_irq(orion5x_legacy_handle_irq);
|
|
|
|
|
2007-10-23 12:14:42 -07:00
|
|
|
/*
|
2010-12-14 04:54:03 -07:00
|
|
|
* Initialize gpiolib for GPIOs 0-31.
|
2007-10-23 12:14:42 -07:00
|
|
|
*/
|
2021-12-14 07:06:56 -07:00
|
|
|
orion_gpio_init(0, 32, GPIO_VIRT_BASE, 0,
|
2012-06-27 04:40:04 -07:00
|
|
|
IRQ_ORION5X_GPIO_START, gpio0_irqs);
|
2007-10-23 12:14:42 -07:00
|
|
|
}
|