Re: a question of mpc8313, maybe simple

Thanks a lot for answer my question.
But i am newhand and not very clear about it.
Do you mean:
1. in this case i do not need to include DMA when i "make menuconfig" ?
        The path is Device Drivers->DMA.
2. in this case i do not need add any DMA information in mpc8313erdb.dts?

Now i am reading PCI driver in kernel 2.6.20 to catch your meaning.


Scott Wood-2 wrote:

On Mon, Jun 23, 2008 at 05:48:07AM -0700, jumpingProgrammer wrote:

quoted

i am working with a board of mpc8313 using default mpc8313erdb.dts.
But i do not know how can i correctly use DMA to transport data from
memory
to a PCI device.
i tryed this
{
     .....
     request_irq(IRQ,....);
     request_dma(.....);
     ....
}

In request_irq() , i do not know what is the parameter IRQ.

Use pci_dev->irq.

quoted

And , i did not find any words about DMA in mpc8313erdb.dts .

PCI devices can do bus-mastering DMA themselves; request_dma() is for ISA
devices.

-Scott
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