diff options
Diffstat (limited to 'arch/arm/plat-orion/irq.c')
| -rw-r--r-- | arch/arm/plat-orion/irq.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/arch/arm/plat-orion/irq.c b/arch/arm/plat-orion/irq.c new file mode 100644 index 00000000..8db0b981 --- /dev/null +++ b/arch/arm/plat-orion/irq.c @@ -0,0 +1,70 @@ +/* + * arch/arm/plat-orion/irq.c + * + * Marvell Orion SoC IRQ handling. + * + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include <linux/kernel.h> +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/irqdomain.h> +#include <linux/io.h> +#include <linux/of_address.h> +#include <linux/of_irq.h> +#include <plat/irq.h> +#include <plat/orion-gpio.h> + +void __init orion_irq_init(unsigned int irq_start, void __iomem *maskaddr) +{ + struct irq_chip_generic *gc; + struct irq_chip_type *ct; + + /* + * Mask all interrupts initially. + */ + writel(0, maskaddr); + + gc = irq_alloc_generic_chip("orion_irq", 1, irq_start, maskaddr, + handle_level_irq); + ct = gc->chip_types; + ct->chip.irq_mask = irq_gc_mask_clr_bit; + ct->chip.irq_unmask = irq_gc_mask_set_bit; + irq_setup_generic_chip(gc, IRQ_MSK(32), IRQ_GC_INIT_MASK_CACHE, + IRQ_NOREQUEST, IRQ_LEVEL | IRQ_NOPROBE); +} + +#ifdef CONFIG_OF +static int __init orion_add_irq_domain(struct device_node *np, + struct device_node *interrupt_parent) +{ + int i = 0; + void __iomem *base; + + do { + base = of_iomap(np, i); + if (base) { + orion_irq_init(i * 32, base); + i++; + } + } while (base); + + irq_domain_add_legacy(np, i * 32, 0, 0, + &irq_domain_simple_ops, NULL); + return 0; +} + +static const struct of_device_id orion_irq_match[] = { + { .compatible = "marvell,orion-intc", + .data = orion_add_irq_domain, }, + {}, +}; + +void __init orion_dt_init_irq(void) +{ + of_irq_init(orion_irq_match); +} +#endif |