diff options
Diffstat (limited to 'arch/arm/mach-mmp/irq.c')
| -rw-r--r-- | arch/arm/mach-mmp/irq.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm/mach-mmp/irq.c b/arch/arm/mach-mmp/irq.c new file mode 100644 index 000000000000..52ff2f065eba --- /dev/null +++ b/arch/arm/mach-mmp/irq.c @@ -0,0 +1,55 @@ +/* + * linux/arch/arm/mach-mmp/irq.c + * + * Generic IRQ handling, GPIO IRQ demultiplexing, etc. + * + * Author: Bin Yang <bin.yang@marvell.com> + * Created: Sep 30, 2008 + * Copyright: Marvell International Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/init.h> +#include <linux/irq.h> +#include <linux/io.h> + +#include <mach/regs-icu.h> + +#include "common.h" + +#define IRQ_ROUTE_TO_AP (ICU_INT_CONF_AP_INT | ICU_INT_CONF_IRQ) + +#define PRIORITY_DEFAULT 0x1 +#define PRIORITY_NONE 0x0 /* means IRQ disabled */ + +static void icu_mask_irq(unsigned int irq) +{ + __raw_writel(PRIORITY_NONE, ICU_INT_CONF(irq)); +} + +static void icu_unmask_irq(unsigned int irq) +{ + __raw_writel(IRQ_ROUTE_TO_AP | PRIORITY_DEFAULT, ICU_INT_CONF(irq)); +} + +static struct irq_chip icu_irq_chip = { + .name = "icu_irq", + .ack = icu_mask_irq, + .mask = icu_mask_irq, + .unmask = icu_unmask_irq, +}; + +void __init icu_init_irq(void) +{ + int irq; + + for (irq = 0; irq < 64; irq++) { + icu_mask_irq(irq); + set_irq_chip(irq, &icu_irq_chip); + set_irq_handler(irq, handle_level_irq); + set_irq_flags(irq, IRQF_VALID); + } +} |