Lennert Buytenhek | 01eb569 | 2008-03-27 14:51:40 -0400 | [diff] [blame] | 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> |
Andrew Lunn | 278b45b | 2012-06-27 13:40:04 +0200 | [diff] [blame] | 14 | #include <linux/irqdomain.h> |
Lennert Buytenhek | 01eb569 | 2008-03-27 14:51:40 -0400 | [diff] [blame] | 15 | #include <linux/io.h> |
Andrew Lunn | 278b45b | 2012-06-27 13:40:04 +0200 | [diff] [blame] | 16 | #include <linux/of_address.h> |
| 17 | #include <linux/of_irq.h> |
Lennert Buytenhek | 6f088f1 | 2008-08-09 13:44:58 +0200 | [diff] [blame] | 18 | #include <plat/irq.h> |
Rob Herring | ce91574 | 2012-08-29 10:16:55 -0500 | [diff] [blame] | 19 | #include <plat/orion-gpio.h> |
Lennert Buytenhek | 01eb569 | 2008-03-27 14:51:40 -0400 | [diff] [blame] | 20 | |
Lennert Buytenhek | 01eb569 | 2008-03-27 14:51:40 -0400 | [diff] [blame] | 21 | void __init orion_irq_init(unsigned int irq_start, void __iomem *maskaddr) |
| 22 | { |
Thomas Gleixner | e59347a | 2011-04-14 19:17:57 +0200 | [diff] [blame] | 23 | struct irq_chip_generic *gc; |
| 24 | struct irq_chip_type *ct; |
Lennert Buytenhek | 01eb569 | 2008-03-27 14:51:40 -0400 | [diff] [blame] | 25 | |
| 26 | /* |
| 27 | * Mask all interrupts initially. |
| 28 | */ |
| 29 | writel(0, maskaddr); |
| 30 | |
Thomas Gleixner | e59347a | 2011-04-14 19:17:57 +0200 | [diff] [blame] | 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); |
Lennert Buytenhek | 01eb569 | 2008-03-27 14:51:40 -0400 | [diff] [blame] | 38 | } |
Andrew Lunn | 278b45b | 2012-06-27 13:40:04 +0200 | [diff] [blame] | 39 | |
| 40 | #ifdef CONFIG_OF |
| 41 | static int __init orion_add_irq_domain(struct device_node *np, |
| 42 | struct device_node *interrupt_parent) |
| 43 | { |
Andrew Lunn | f9e7592 | 2012-11-17 17:00:44 +0100 | [diff] [blame] | 44 | int i = 0; |
Andrew Lunn | 278b45b | 2012-06-27 13:40:04 +0200 | [diff] [blame] | 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); |
Andrew Lunn | 278b45b | 2012-06-27 13:40:04 +0200 | [diff] [blame] | 57 | return 0; |
| 58 | } |
| 59 | |
| 60 | static const struct of_device_id orion_irq_match[] = { |
| 61 | { .compatible = "marvell,orion-intc", |
| 62 | .data = orion_add_irq_domain, }, |
| 63 | {}, |
| 64 | }; |
| 65 | |
| 66 | void __init orion_dt_init_irq(void) |
| 67 | { |
| 68 | of_irq_init(orion_irq_match); |
| 69 | } |
| 70 | #endif |