On Tue, 2008-09-23 at 13:08 +0200, Joakim Tjernlund wrote:
> On Tue, 2008-09-23 at 11:08 +0200, Andre Schwarz wrote:
> > I can only tell how I do on MPC834x :
> >
> > Table 8-6. IVEC/CVEC/MVEC Field Definition
> >
> > Interrupt ID Number Interrupt Meaning
> > 17 IRQ1
> > 18 IRQ2
> > 19 IRQ3
> > 20 IRQ4
> > 21 IRQ5
> > 22 IRQ6
> > 23 IRQ7
> > 48 IRQ0
> >
> >
> > Given this I can use this dts section for PCI devices connected @ IRQ0
> > and IRQ1
> >
> > interrupt-map = <0x5800 0 0 1 &ipic 0x30 0x8
> > 0x6000 0 0 1 &ipic 0x11 0x8
> > 0x6000 0 0 2 &ipic 0x11 0x8>;
> >
> > You should be able to use IRQ-Nr 18-20 for IRQ2-4.
>
> Yes, that makes sense. Thanks.
>
> Jocke
OK, finally figured it out, see below, but I get a SEGV if I use
IRQ_TYPE_EDGE_FALLING as below. IRQ_TYPE_EDGE_FALLING works.
info->irq = irq_create_mapping(NULL, 19); /* IRQ3 */
printk(KERN_ERR "IRQ map from %d to %ld\n", 19, info->irq);
info->irq_flags = IRQ_TYPE_EDGE_FALLING;
pdev = platform_device_register_simple("uio_irq", 3, r, 0);
if (IS_ERR(pdev)) {
ret = PTR_ERR(pdev);
printk("uio_irq: simple returned :%d\n", ret);
goto err_out;
}
if ((ret = uio_register_device(&pdev->dev, info))) {
printk("uio_register_device: returned :%d\n", ret);
goto err_out;
}
The SEGV is in kernel/irq/manage.c, around line 375. Both
desc->chip->enable and desc->chip->startup are NULL:
if (!(desc->status & IRQ_NOAUTOEN)) {
desc->depth = 0;
desc->status &= ~IRQ_DISABLED;
if (desc->chip->startup)
desc->chip->startup(irq);
else
desc->chip->enable(irq);
} else
What am I missing? Kernel is 2.6.25
Jocke
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