50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/*
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* arch/arm/mach-kirkwood/irq.c
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*
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* Kirkwood IRQ handling.
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*
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* This file is licensed under the terms of the GNU General Public
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* License version 2. This program is licensed "as is" without any
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* warranty of any kind, whether express or implied.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/irq.h>
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#include <linux/io.h>
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#include <mach/bridge-regs.h>
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#include <plat/irq.h>
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#include <asm/gpio.h>
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#include "common.h"
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static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
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{
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BUG_ON(irq < IRQ_KIRKWOOD_GPIO_LOW_0_7);
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BUG_ON(irq > IRQ_KIRKWOOD_GPIO_HIGH_16_23);
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orion_gpio_irq_handler((irq - IRQ_KIRKWOOD_GPIO_LOW_0_7) << 3);
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}
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void __init kirkwood_init_irq(void)
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{
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orion_irq_init(0, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF));
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orion_irq_init(32, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF));
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/*
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* Initialize gpiolib for GPIOs 0-49.
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*/
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orion_gpio_init(0, 32, GPIO_LOW_VIRT_BASE, 0,
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IRQ_KIRKWOOD_GPIO_START);
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irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_0_7, gpio_irq_handler);
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irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_8_15, gpio_irq_handler);
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irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_16_23, gpio_irq_handler);
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irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_24_31, gpio_irq_handler);
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orion_gpio_init(32, 18, GPIO_HIGH_VIRT_BASE, 0,
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IRQ_KIRKWOOD_GPIO_START + 32);
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irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_0_7, gpio_irq_handler);
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irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_8_15, gpio_irq_handler);
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irq_set_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_16_23,
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gpio_irq_handler);
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}
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