On Wed, 23 Jul 2008 15:58:38 +0100 "Richard Whitlock" <[EMAIL PROTECTED]> wrote:
> I have a small problem with a port of linux 2.6.26 to a custom board. > Our board is almost identical to the Analogue & Micro asp 8347 board, > so I'm using Kumar Gala's excellent fsl tree (thank you Kumar) as it > already has a defconfig for the asp. > Thanks also to Bryan O'Donoghue for pointing us in the direction of > the asp port in the first place. > > The problem we have is I am unable to request an external interrupt. > We have an FPGA which has an interrupt line - HW IRQ_0, so thats > linux IRQ 48. I have added the following to the dts file: > > [EMAIL PROTECTED] { > interrupts = <48 8>; > interrupt-parent = <&ipic>; > } > > but whenever I call request_irq() it returns -ENOSYS. > > The driver loads fine, and the open function does very little - a > call to ioremap() - which works, and a call to request_irq() which > does not. Is there anything else I have to do to configure this > interrupt? I don't think you have enough information in the dts. We do the same thing on the warp (you can look at the warp.dts): [EMAIL PROTECTED],0 { compatible = "pika,fpga"; reg = <0x00000002 0x00000000 0x00001000>; interrupts = <0x18 0x8>; interrupt-parent = <&UIC0>; }; You need the compatible, maybe "kfaf,fpga", and I believe the reg entry although you could try without it. You then can use: of_find_compatible_node irq_of_parse_and_map request_irq platforms/44x/warp.c shows an example using the ad7414. Just change the ad7414 string to your compatible string. Cheers, Sean _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev