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Commit 22225835 authored by Petr Kulhavy's avatar Petr Kulhavy Committed by Mark Brown
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ASoC: davinci-mcbsp: add binding for McBSP 



Add devicetree binding for the TI DA850/OMAP-L138/AM18xx
MultiChannel Buffered Serial Port (McBSP)

The optional register range "dat" is not implemented at the moment.
The current driver supports only DMA into RX/TX registers but no FIFO.
Once the FIFO is implemented in the driver the "dat" range will be used.

Signed-off-by: default avatarPetr Kulhavy <petr@barix.com>
Reviewed-by: default avatarPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent f55532a0

Documentation/devicetree/bindings/sound/davinci-mcbsp.txt

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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>;

	interrupts-names = "rx", "tx";

	dmas = <&edma0 3 1

		&edma0 2 1>;

	dma-names = "tx", "rx";

	status = "okay";

};