xref: /kernel/linux/linux-5.10/Documentation/devicetree/bindings/sound/davinci-mcbsp.txt (revision 8c2ecf20)

Texas Instruments DaVinci McBSP module
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

This binding describes the "Multi-channel Buffered Serial Port" (McBSP)
audio interface found in some TI DaVinci processors like the OMAP-L138 or AM180x.


Required properties:
~~~~~~~~~~~~~~~~~~~~
- compatible :
        "ti,da850-mcbsp" : for DA850, AM180x and OPAM-L138 platforms

- reg : physical base address and length of the controller memory mapped
        region(s).
- reg-names : Should contain:
        * "mpu" for the main registers (required).
        * "dat" for the data FIFO (optional).

- dmas: three element list of DMA controller phandles, DMA request line and
	TC channel ordered triplets.
- dma-names: identifier string for each DMA request line in the dmas property.
	These strings correspond 1:1 with the ordered pairs in dmas. The dma
	identifiers must be "rx" and "tx".

Optional properties:
~~~~~~~~~~~~~~~~~~~~
- interrupts : Interrupt numbers for McBSP
- interrupt-names : Known interrupt names are "rx" and "tx"

- pinctrl-0: Should specify pin control group used for this controller.
- pinctrl-names: Should contain only one value - "default", for more details
        please refer to pinctrl-bindings.txt

Example (AM1808):
~~~~~~~~~~~~~~~~~

mcbsp0: mcbsp@1d10000 {
	compatible = "ti,da850-mcbsp";
	pinctrl-names = "default";
	pinctrl-0 = <&mcbsp0_pins>;

	reg = 	<0x00110000 0x1000>,
		<0x00310000 0x1000>;
	reg-names = "mpu", "dat";
	interrupts = <97 98>;
	interrupt-names = "rx", "tx";
	dmas = <&edma0 3 1
		&edma0 2 1>;
	dma-names = "tx", "rx";
};