2 * arch/arm/mach-mv78xx0/irq.c
4 * MV78xx0 IRQ handling.
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.
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/pci.h>
14 #include <linux/irq.h>
16 #include <mach/bridge-regs.h>
20 static void gpio_irq_handler(unsigned int irq
, struct irq_desc
*desc
)
22 BUG_ON(irq
< IRQ_MV78XX0_GPIO_0_7
|| irq
> IRQ_MV78XX0_GPIO_24_31
);
24 orion_gpio_irq_handler((irq
- IRQ_MV78XX0_GPIO_0_7
) << 3);
27 void __init
mv78xx0_init_irq(void)
31 /* Initialize gpiolib. */
34 orion_irq_init(0, (void __iomem
*)(IRQ_VIRT_BASE
+ IRQ_MASK_LOW_OFF
));
35 orion_irq_init(32, (void __iomem
*)(IRQ_VIRT_BASE
+ IRQ_MASK_HIGH_OFF
));
36 orion_irq_init(64, (void __iomem
*)(IRQ_VIRT_BASE
+ IRQ_MASK_ERR_OFF
));
39 * Mask and clear GPIO IRQ interrupts.
41 writel(0, GPIO_LEVEL_MASK(0));
42 writel(0, GPIO_EDGE_MASK(0));
43 writel(0, GPIO_EDGE_CAUSE(0));
45 for (i
= IRQ_MV78XX0_GPIO_START
; i
< NR_IRQS
; i
++) {
46 set_irq_chip(i
, &orion_gpio_irq_chip
);
47 set_irq_handler(i
, handle_level_irq
);
48 irq_desc
[i
].status
|= IRQ_LEVEL
;
49 set_irq_flags(i
, IRQF_VALID
);
51 set_irq_chained_handler(IRQ_MV78XX0_GPIO_0_7
, gpio_irq_handler
);
52 set_irq_chained_handler(IRQ_MV78XX0_GPIO_8_15
, gpio_irq_handler
);
53 set_irq_chained_handler(IRQ_MV78XX0_GPIO_16_23
, gpio_irq_handler
);
54 set_irq_chained_handler(IRQ_MV78XX0_GPIO_24_31
, gpio_irq_handler
);
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