1 // SPDX-License-Identifier: GPL-2.0-only
3 * arch/arm/mach-orion5x/irq.c
5 * Core IRQ functions for Marvell Orion System On Chip
7 * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
9 #include <linux/gpio.h>
10 #include <linux/kernel.h>
11 #include <linux/irq.h>
13 #include <plat/orion-gpio.h>
15 #include <asm/exception.h>
16 #include "bridge-regs.h"
19 static int __initdata gpio0_irqs[4] = {
21 IRQ_ORION5X_GPIO_8_15,
22 IRQ_ORION5X_GPIO_16_23,
23 IRQ_ORION5X_GPIO_24_31,
26 static asmlinkage void
27 __exception_irq_entry orion5x_legacy_handle_irq(struct pt_regs *regs)
31 stat = readl_relaxed(MAIN_IRQ_CAUSE);
32 stat &= readl_relaxed(MAIN_IRQ_MASK);
34 unsigned int hwirq = 1 + __fls(stat);
35 handle_IRQ(hwirq, regs);
40 void __init orion5x_init_irq(void)
42 orion_irq_init(1, MAIN_IRQ_MASK);
44 set_handle_irq(orion5x_legacy_handle_irq);
47 * Initialize gpiolib for GPIOs 0-31.
49 orion_gpio_init(0, 32, GPIO_VIRT_BASE, 0,
50 IRQ_ORION5X_GPIO_START, gpio0_irqs);