Re: [alsa-devel] [PATCH v3] [POWERPC] Update MPC8610 HPCD to support audio drivers

Grant Likely wrote:

...

•            dma@21300 {
  

•                    #address-cells = <1>;
  

•                    #size-cells = <1>;
  

•                    compatible = "fsl,mpc8610-dma", "fsl,eloplus-dma";
  

•                    cell-index = <0>;
  

•                    reg = <21300 4>; /* DMA general status register */
  

•                    ranges = <0 21100 200>;
  

•                    dma-channel@0 {
  

•                           compatible = "fsl,mpc8610-dma-channel",
  

•                                   "fsl,eloplus-dma-channel";
  

Nit: you probably don't need the compatible property for these channel nodes since they are 100% dependent on the parent for describing the behaviour.

The compatible property in the child nodes gives the driver the option of matching the channel rather than the whole thing.

-Scott