linux-stable/arch/arm/mach-dove/irq.c
Thomas Gleixner 0fdebc5ec2 treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_56.RULE (part 1)
Based on the normalized pattern:

    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

extracted by the scancode license scanner the SPDX license identifier

    GPL-2.0-only

has been chosen to replace the boilerplate/reference.

Reviewed-by: Allison Randal <allison@lohutok.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-06-10 14:51:35 +02:00

81 lines
1.6 KiB
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* arch/arm/mach-dove/irq.c
*
* Dove IRQ handling.
*/
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/io.h>
#include <asm/exception.h>
#include <plat/irq.h>
#include <plat/orion-gpio.h>
#include "pm.h"
#include "bridge-regs.h"
#include "common.h"
static int __initdata gpio0_irqs[4] = {
IRQ_DOVE_GPIO_0_7,
IRQ_DOVE_GPIO_8_15,
IRQ_DOVE_GPIO_16_23,
IRQ_DOVE_GPIO_24_31,
};
static int __initdata gpio1_irqs[4] = {
IRQ_DOVE_HIGH_GPIO,
0,
0,
0,
};
static int __initdata gpio2_irqs[4] = {
0,
0,
0,
0,
};
static void __iomem *dove_irq_base = IRQ_VIRT_BASE;
static asmlinkage void
__exception_irq_entry dove_legacy_handle_irq(struct pt_regs *regs)
{
u32 stat;
stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_LOW_OFF);
stat &= readl_relaxed(dove_irq_base + IRQ_MASK_LOW_OFF);
if (stat) {
unsigned int hwirq = 1 + __fls(stat);
handle_IRQ(hwirq, regs);
return;
}
stat = readl_relaxed(dove_irq_base + IRQ_CAUSE_HIGH_OFF);
stat &= readl_relaxed(dove_irq_base + IRQ_MASK_HIGH_OFF);
if (stat) {
unsigned int hwirq = 33 + __fls(stat);
handle_IRQ(hwirq, regs);
return;
}
}
void __init dove_init_irq(void)
{
orion_irq_init(1, IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF);
orion_irq_init(33, IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF);
set_handle_irq(dove_legacy_handle_irq);
/*
* Initialize gpiolib for GPIOs 0-71.
*/
orion_gpio_init(0, 32, DOVE_GPIO_LO_VIRT_BASE, 0,
IRQ_DOVE_GPIO_START, gpio0_irqs);
orion_gpio_init(32, 32, DOVE_GPIO_HI_VIRT_BASE, 0,
IRQ_DOVE_GPIO_START + 32, gpio1_irqs);
orion_gpio_init(64, 8, DOVE_GPIO2_VIRT_BASE, 0,
IRQ_DOVE_GPIO_START + 64, gpio2_irqs);
}