Ron Madrid wrote:
Here's my code. There are a few other things that happen but they are inconsequential to this problem. I'm sure that the request_irq call is right, especially since it works if the fsldma drivers are builtin to the kernel. Also, the irq number 71 comes from the reference manual for them MPC8313. It is the internal interrupt for the DMA. I'll do some more testing in a little while to try to determine the cause of the error in request_irq.
You cannot pass hardware IRQ numbers directly to request_irq() -- it has no idea which IRQ controller you're referring to (even if there happens to be only one on your board).
You should get the IRQ from the device tree, using irq_of_parse_and_map() on the device node for the DMA channel (see the mpc8377mds device tree for an example DMA node).
-Scott _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
