[deliverable/linux.git] / Documentation / devicetree / bindings / sound / brcm,bcm2835-i2s.txt

* Broadcom BCM2835 SoC I2S/PCM module

Required properties:
- compatible: "brcm,bcm2835-i2s"
- reg: A list of base address and size entries:
	* The first entry should cover the PCM registers
	* The second entry should cover the PCM clock registers
- dmas: List of DMA controller phandle and DMA request line ordered pairs.
- dma-names: Identifier string for each DMA request line in the dmas property.
  These strings correspond 1:1 with the ordered pairs in dmas.

  One of the DMA channels will be responsible for transmission (should be
  named "tx") and one for reception (should be named "rx").

Example:

bcm2835_i2s: i2s@7e203000 {
	compatible = "brcm,bcm2835-i2s";
	reg = <0x7e203000 0x20>,
	      <0x7e101098 0x02>;

	dmas = <&dma 2>,
	       <&dma 3>;
	dma-names = "tx", "rx";
};
Commit	Line	Data
c6aeb7de FM	1	* Broadcom BCM2835 SoC I2S/PCM module
	2
	3	Required properties:
	4	- compatible: "brcm,bcm2835-i2s"
	5	- reg: A list of base address and size entries:
	6	* The first entry should cover the PCM registers
	7	* The second entry should cover the PCM clock registers
	8	- dmas: List of DMA controller phandle and DMA request line ordered pairs.
	9	- dma-names: Identifier string for each DMA request line in the dmas property.
	10	These strings correspond 1:1 with the ordered pairs in dmas.
	11
	12	One of the DMA channels will be responsible for transmission (should be
	13	named "tx") and one for reception (should be named "rx").
	14
	15	Example:
	16
	17	bcm2835_i2s: i2s@7e203000 {
	18	compatible = "brcm,bcm2835-i2s";
	19	reg = <0x7e203000 0x20>,
	20	<0x7e101098 0x02>;
	21
	22	dmas = <&dma 2>,
	23	<&dma 3>;
	24	dma-names = "tx", "rx";
	25	};