On Fri, 11 Feb 2011 14:07:26 -0500 Kenny Ho <k...@belairnetworks.com> wrote:
> Hi, > > > > I am trying to write a device driver that uses an external interrupt > (one of the 16 irq lines) for the Freescale P1020 processor and I hope > some of you can help. Am I suppose to setup a separate node in the dts > and look for that node in my driver to setup the interrupt? Ideally, yes. It's good to describe your device with a node even if it doesn't have interrupts. > Or does the > dts interrupt declaration belong to the interrupt-controller > declaration? I noticed the mpc8xxx_gpio driver defined its own irq_chip > but I thought that may be because each gpio pin can trigger an > interrupt. Right, it's because gpio is an interrupt controller, not just a user of one. > Do I need to define my own irq_chip structure for my device > even if I am using one of the hard irq lines? No. If the device's node describes the interrupt correctly, you can use irq_of_parse_and_map() on the device node to get a virtual irq that you can pass to request_irq(). -Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
