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author | root <root@dyn-67.arm.linux.org.uk> | 2009-03-25 01:04:25 +0300 |
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committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-03-25 01:04:25 +0300 |
commit | 9a38e989b8ce04923f919fc2a8a24eb07fb484e2 (patch) | |
tree | 6b99638dc32b99420ada46ca8d1373ad7aa5a208 /arch/arm/mach-mmp/irq.c | |
parent | 7d83f8fca517b123cf0136503a9e50974f65ec49 (diff) | |
parent | 5fa82eb8ff06cd3ac4d64c6875922ae1dfa003c5 (diff) | |
download | linux-9a38e989b8ce04923f919fc2a8a24eb07fb484e2.tar.xz |
Merge branch 'devel' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 into devel
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); + } +} |