lhthanh wrote: > Thanks for your explaination! So if I want to transfer a buffer of data > from a single I/O port, will not DMA framework > also be able ?
No. > Have I to write aother driver? Yes. > Actually, I don't want write all because there are serveral DMA code at > hand. I only want to use a framework instead of re-writing. There is no framework for what you want to do. There is only one other driver that does what you want (sound/soc/fsl/fsl_dma.c), and that is a complicated driver that does many things besides transferring data to an I/O port. > And I afraid that I can not write code which assure sharing DMA channels. Look at arch/powerpc/boot/dts/mpc8610_hpcd.dts. The DMA channels that are needed by the 8610 audio driver have a different 'compatible' property. This is how you prevent the generic DMA driver from using a channel that you want. I'm afraid that you're going to have to study the DMA programming model, and my device driver, and write a brand new driver from scratch. -- Timur Tabi Linux kernel developer at Freescale _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
