1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * arch/arm/mach-orion5x/irq.c
 4 *
 5 * Core IRQ functions for Marvell Orion System On Chip
 6 *
 7 * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
 
 
 
 
 8 */
 9#include <linux/gpio.h>
10#include <linux/kernel.h>
 
11#include <linux/irq.h>
12#include <linux/io.h>
13#include <plat/orion-gpio.h>
 
14#include <plat/irq.h>
15#include <asm/exception.h>
16#include "bridge-regs.h"
17#include "common.h"
18
19static int __initdata gpio0_irqs[4] = {
20	IRQ_ORION5X_GPIO_0_7,
21	IRQ_ORION5X_GPIO_8_15,
22	IRQ_ORION5X_GPIO_16_23,
23	IRQ_ORION5X_GPIO_24_31,
24};
25
26static asmlinkage void
27__exception_irq_entry orion5x_legacy_handle_irq(struct pt_regs *regs)
28{
29	u32 stat;
30
31	stat = readl_relaxed(MAIN_IRQ_CAUSE);
32	stat &= readl_relaxed(MAIN_IRQ_MASK);
33	if (stat) {
34		unsigned int hwirq = 1 + __fls(stat);
35		handle_IRQ(hwirq, regs);
36		return;
37	}
38}
39
40void __init orion5x_init_irq(void)
41{
42	orion_irq_init(1, MAIN_IRQ_MASK);
43
44	set_handle_irq(orion5x_legacy_handle_irq);
45
46	/*
47	 * Initialize gpiolib for GPIOs 0-31.
48	 */
49	orion_gpio_init(0, 32, GPIO_VIRT_BASE, 0,
50			IRQ_ORION5X_GPIO_START, gpio0_irqs);
 
 
 
51}

 
 1/*
 2 * arch/arm/mach-orion5x/irq.c
 3 *
 4 * Core IRQ functions for Marvell Orion System On Chip
 5 *
 6 * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
 7 *
 8 * This file is licensed under the terms of the GNU General Public
 9 * License version 2.  This program is licensed "as is" without any
10 * warranty of any kind, whether express or implied.
11 */
12
13#include <linux/kernel.h>
14#include <linux/init.h>
15#include <linux/irq.h>
16#include <linux/io.h>
17#include <asm/gpio.h>
18#include <mach/bridge-regs.h>
19#include <plat/irq.h>
 
 
20#include "common.h"
21
22static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
 
 
 
 
 
 
 
 
23{
24	BUG_ON(irq < IRQ_ORION5X_GPIO_0_7 || irq > IRQ_ORION5X_GPIO_24_31);
25
26	orion_gpio_irq_handler((irq - IRQ_ORION5X_GPIO_0_7) << 3);
 
 
 
 
 
 
27}
28
29void __init orion5x_init_irq(void)
30{
31	orion_irq_init(0, (void __iomem *)MAIN_IRQ_MASK);
 
 
32
33	/*
34	 * Initialize gpiolib for GPIOs 0-31.
35	 */
36	orion_gpio_init(0, 32, GPIO_VIRT_BASE, 0, IRQ_ORION5X_GPIO_START);
37	irq_set_chained_handler(IRQ_ORION5X_GPIO_0_7, gpio_irq_handler);
38	irq_set_chained_handler(IRQ_ORION5X_GPIO_8_15, gpio_irq_handler);
39	irq_set_chained_handler(IRQ_ORION5X_GPIO_16_23, gpio_irq_handler);
40	irq_set_chained_handler(IRQ_ORION5X_GPIO_24_31, gpio_irq_handler);
41}