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01eb5698 LB |
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> | |
278b45b0 | 14 | #include <linux/irqdomain.h> |
01eb5698 | 15 | #include <linux/io.h> |
278b45b0 AL |
16 | #include <linux/of_address.h> |
17 | #include <linux/of_irq.h> | |
6f088f1d | 18 | #include <plat/irq.h> |
ce91574c | 19 | #include <plat/orion-gpio.h> |
01eb5698 | 20 | |
01eb5698 LB |
21 | void __init orion_irq_init(unsigned int irq_start, void __iomem *maskaddr) |
22 | { | |
e59347a1 TG |
23 | struct irq_chip_generic *gc; |
24 | struct irq_chip_type *ct; | |
01eb5698 LB |
25 | |
26 | /* | |
27 | * Mask all interrupts initially. | |
28 | */ | |
29 | writel(0, maskaddr); | |
30 | ||
e59347a1 TG |
31 | gc = irq_alloc_generic_chip("orion_irq", 1, irq_start, maskaddr, |
32 | handle_level_irq); | |
33 | ct = gc->chip_types; | |
34 | ct->chip.irq_mask = irq_gc_mask_clr_bit; | |
35 | ct->chip.irq_unmask = irq_gc_mask_set_bit; | |
36 | irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_MASK_CACHE, | |
37 | IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE); | |
01eb5698 | 38 | } |
278b45b0 AL |
39 | |
40 | #ifdef CONFIG_OF | |
41 | static int __init orion_add_irq_domain(struct device_node *np, | |
42 | struct device_node *interrupt_parent) | |
43 | { | |
44 | int i = 0, irq_gpio; | |
45 | void __iomem *base; | |
46 | ||
47 | do { | |
48 | base = of_iomap(np, i); | |
49 | if (base) { | |
50 | orion_irq_init(i * 32, base); | |
51 | i++; | |
52 | } | |
53 | } while (base); | |
54 | ||
55 | irq_domain_add_legacy(np, i * 32, 0, 0, | |
56 | &irq_domain_simple_ops, NULL); | |
57 | ||
58 | irq_gpio = i * 32; | |
59 | orion_gpio_of_init(irq_gpio); | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
64 | static const struct of_device_id orion_irq_match[] = { | |
65 | { .compatible = "marvell,orion-intc", | |
66 | .data = orion_add_irq_domain, }, | |
67 | {}, | |
68 | }; | |
69 | ||
70 | void __init orion_dt_init_irq(void) | |
71 | { | |
72 | of_irq_init(orion_irq_match); | |
73 | } | |
74 | #endif |