> this is an example of how a simple 8313 Periodic Interval Timer (PIT) kernel
> driver
> registers for the PIT IRQ (Interrupt ID 65)
>
> #define PIT_IRQ 65
>
> virq = irq_create_mapping(NULL, PIT_IRQ);
> set_irq_type(virq, IRQ_TYPE_LEVEL_LOW);
>
> if(request_irq(virq, (irq_handler_t)timerEvent, 0, "timer2", (void *)0)) {
> printk(KERN_ERR "request_irq() returned error for irq=%d virq=%d\n",
> PIT_IRQ, virq);
> }
It is some time ago, but when I did something similar I needed the
following patch in order to use NULL for irq_create_mapping(). Have a
try, and if it is still needed (as it looks from a glimpse), then maybe
we should get it merged?
===
From: Wolfram Sang <w.s...@pengutronix.de>
Subject: [PATCH] powerpc/cpm2: make cpm2_pic the default host
Signed-off-by: Wolfram Sang <w.s...@pengutronix.de>
---
arch/powerpc/sysdev/cpm2_pic.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/sysdev/cpm2_pic.c b/arch/powerpc/sysdev/cpm2_pic.c
index 78f1f7c..7a7d4e5 100644
--- a/arch/powerpc/sysdev/cpm2_pic.c
+++ b/arch/powerpc/sysdev/cpm2_pic.c
@@ -272,4 +272,5 @@ void cpm2_pic_init(struct device_node *node)
printk(KERN_ERR "CPM2 PIC: failed to allocate irq host!\n");
return;
}
+ irq_set_default_host(cpm2_pic_host);
}
--
Pengutronix e.K. | Wolfram Sang |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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