1 /*
2 * arch/arm/plat-orion/irq.c
3 *
4 * Marvell Orion SoC IRQ handling.
5 *
6 * This file is licensed under the terms of the GNU General Public
7 * License version 2. This program is licensed "as is" without any
8 * warranty of any kind, whether express or implied.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/irq.h>
14 #include <linux/irqdomain.h>
15 #include <linux/io.h>
16 #include <linux/of_address.h>
17 #include <linux/of_irq.h>
18 #include <asm/exception.h>
19 #include <plat/irq.h>
20 #include <plat/orion-gpio.h>
21
22 void __init orion_irq_init(unsigned int irq_start, void __iomem *maskaddr)
23 {
24 struct irq_chip_generic *gc;
25 struct irq_chip_type *ct;
26
27 /*
28 * Mask all interrupts initially.
29 */
30 writel(0, maskaddr);
31
32 gc = irq_alloc_generic_chip("orion_irq", 1, irq_start, maskaddr,
33 handle_level_irq);
34 ct = gc->chip_types;
35 ct->chip.irq_mask = irq_gc_mask_clr_bit;
36 ct->chip.irq_unmask = irq_gc_mask_set_bit;
37 irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_MASK_CACHE,
38 IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE);
39 }
40
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.