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authorLennert Buytenhek <buytenh@wantstofly.org>2008-10-19 19:51:04 -0400
committerNicolas Pitre <nico@cam.org>2008-12-20 12:26:57 -0500
commit4c21343005b6b0d6ef24ab6e6a8f3883ff0cb569 (patch)
tree6a5cab5b87ce81abb3045882e083cccc9e2436eb /arch/arm/mach-kirkwood/irq.c
parent07332318f33da6acd88abb762a8b6febdfc560a3 (diff)
[ARM] Kirkwood: implement GPIO and GPIO interrupt support
Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: Nicolas Pitre <nico@marvell.com>
Diffstat (limited to 'arch/arm/mach-kirkwood/irq.c')
-rw-r--r--arch/arm/mach-kirkwood/irq.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/arm/mach-kirkwood/irq.c b/arch/arm/mach-kirkwood/irq.c
index 5790643ffe07..efb86b700276 100644
--- a/arch/arm/mach-kirkwood/irq.c
+++ b/arch/arm/mach-kirkwood/irq.c
@@ -13,10 +13,45 @@
13#include <linux/irq.h> 13#include <linux/irq.h>
14#include <linux/io.h> 14#include <linux/io.h>
15#include <plat/irq.h> 15#include <plat/irq.h>
16#include <asm/gpio.h>
16#include "common.h" 17#include "common.h"
17 18
19static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
20{
21 BUG_ON(irq < IRQ_KIRKWOOD_GPIO_LOW_0_7);
22 BUG_ON(irq > IRQ_KIRKWOOD_GPIO_HIGH_16_23);
23
24 orion_gpio_irq_handler((irq - IRQ_KIRKWOOD_GPIO_LOW_0_7) << 3);
25}
26
18void __init kirkwood_init_irq(void) 27void __init kirkwood_init_irq(void)
19{ 28{
29 int i;
30
20 orion_irq_init(0, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF)); 31 orion_irq_init(0, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF));
21 orion_irq_init(32, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF)); 32 orion_irq_init(32, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF));
33
34 /*
35 * Mask and clear GPIO IRQ interrupts.
36 */
37 writel(0, GPIO_LEVEL_MASK(0));
38 writel(0, GPIO_EDGE_MASK(0));
39 writel(0, GPIO_EDGE_CAUSE(0));
40 writel(0, GPIO_LEVEL_MASK(32));
41 writel(0, GPIO_EDGE_MASK(32));
42 writel(0, GPIO_EDGE_CAUSE(32));
43
44 for (i = IRQ_KIRKWOOD_GPIO_START; i < NR_IRQS; i++) {
45 set_irq_chip(i, &orion_gpio_irq_level_chip);
46 set_irq_handler(i, handle_level_irq);
47 irq_desc[i].status |= IRQ_LEVEL;
48 set_irq_flags(i, IRQF_VALID);
49 }
50 set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_0_7, gpio_irq_handler);
51 set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_8_15, gpio_irq_handler);
52 set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_16_23, gpio_irq_handler);
53 set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_24_31, gpio_irq_handler);
54 set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_0_7, gpio_irq_handler);
55 set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_8_15, gpio_irq_handler);
56 set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_16_23, gpio_irq_handler);
22} 57}