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Documentation / devicetree / bindings / sound / davinci-mcasp-audio.txt




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Based on kernel version 3.13. Page generated on 2014-01-20 22:01 EST.

1	Texas Instruments McASP controller
2	
3	Required properties:
4	- compatible :
5		"ti,dm646x-mcasp-audio"	: for DM646x platforms
6		"ti,da830-mcasp-audio"	: for both DA830 & DA850 platforms
7		"ti,am33xx-mcasp-audio"	: for AM33xx platforms (AM33xx, TI81xx)
8	
9	- reg : Should contain reg specifiers for the entries in the reg-names property.
10	- reg-names : Should contain:
11	         * "mpu" for the main registers (required). For compatibility with
12	           existing software, it is recommended this is the first entry.
13	         * "dat" for separate data port register access (optional).
14	- op-mode : I2S/DIT ops mode. 0 for I2S mode. 1 for DIT mode used for S/PDIF,
15	  	    IEC60958-1, and AES-3 formats.
16	- tdm-slots : Slots for TDM operation. Indicates number of channels transmitted
17	  	      or received over one serializer.
18	- serial-dir : A list of serializer configuration. Each entry is a number
19	               indication for serializer pin direction.
20	               (0 - INACTIVE, 1 - TX, 2 - RX)
21	- dmas: two element list of DMA controller phandles and DMA request line
22	        ordered pairs.
23	- dma-names: identifier string for each DMA request line in the dmas property.
24		     These strings correspond 1:1 with the ordered pairs in dmas. The dma
25		     identifiers must be "rx" and "tx".
26	
27	Optional properties:
28	
29	- ti,hwmods : Must be "mcasp<n>", n is controller instance starting 0
30	- tx-num-evt : FIFO levels.
31	- rx-num-evt : FIFO levels.
32	- sram-size-playback : size of sram to be allocated during playback
33	- sram-size-capture  : size of sram to be allocated during capture
34	- interrupts : Interrupt numbers for McASP, currently not used by the driver
35	- interrupt-names : Known interrupt names are "tx" and "rx"
36	- pinctrl-0: Should specify pin control group used for this controller.
37	- pinctrl-names: Should contain only one value - "default", for more details
38	  		 please refer to pinctrl-bindings.txt
39	  
40	
41	Example:
42	
43	mcasp0: mcasp0@1d00000 {
44		compatible = "ti,da830-mcasp-audio";
45		reg = <0x100000 0x3000>;
46		reg-names "mpu";
47		interrupts = <82>, <83>;
48		interrupts-names = "tx", "rx";
49		op-mode = <0>;		/* MCASP_IIS_MODE */
50		tdm-slots = <2>;
51		serial-dir = <
52				0 0 0 0	/* 0: INACTIVE, 1: TX, 2: RX */
53				0 0 0 0
54				0 0 0 1
55				2 0 0 0 >;
56		tx-num-evt = <1>;
57		rx-num-evt = <1>;
58	};
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