| * ARM PrimeCell PL330 DMA Controller |
| |
| The ARM PrimeCell PL330 DMA controller can move blocks of memory contents |
| between memory and peripherals or memory to memory. |
| |
| Required properties: |
| - compatible: should include both "arm,pl330" and "arm,primecell". |
| - reg: physical base address of the controller and length of memory mapped |
| region. |
| - interrupts: interrupt number to the cpu. |
| |
| Optional properties: |
| - dma-coherent : Present if dma operations are coherent |
| |
| Example: |
| |
| pdma0: pdma@12680000 { |
| compatible = "arm,pl330", "arm,primecell"; |
| reg = <0x12680000 0x1000>; |
| interrupts = <99>; |
| }; |
| |
| Client drivers (device nodes requiring dma transfers from dev-to-mem or |
| mem-to-dev) should specify the DMA channel numbers using a two-value pair |
| as shown below. |
| |
| [property name] = <[phandle of the dma controller] [dma request id]>; |
| |
| where 'dma request id' is the dma request number which is connected |
| to the client controller. The 'property name' is recommended to be |
| of the form <name>-dma-channel. |
| |
| Example: tx-dma-channel = <&pdma0 12>; |
