Shawn Guo wrote:
> It's not about virtual or physical channel. I'm asking suggestion on
> how we bind the channel number for each dma client device in device
> tree and how they will get the number from device tree when they get
> probed.
IMHO, a simple property that lists the DMA channels to use should be okay.
Arnd's example looks good to me:
ssi@83fcc000 { /* SSI1 */
compatible = "fsl,imx51-ssi", "fsl,imx1-ssi";
reg = <0x83fcc000 0x4000>;
interrupts = <29>;
dma-parent = &fsldma1;
dma-channels = <29 28 27 26>; /* TX0 RX0 TX1 RX1 */
};
However, I would use less generic property names, like
"fsl,ssi-dma-parent" or something like that.
--
Timur Tabi
Linux kernel developer at Freescale
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