1 Texas Instruments McASP controller
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, AM43xx, TI81xx)
8 "ti,dra7-mcasp-audio" : for DRA7xx platforms
9 "ti,omap4-mcasp-audio" : for OMAP4
11 - reg : Should contain reg specifiers for the entries in the reg-names property.
12 - reg-names : Should contain:
13 * "mpu" for the main registers (required). For compatibility with
14 existing software, it is recommended this is the first entry.
15 * "dat" for separate data port register access (optional).
16 - op-mode : I2S/DIT ops mode. 0 for I2S mode. 1 for DIT mode used for S/PDIF,
17 IEC60958-1, and AES-3 formats.
18 - tdm-slots : Slots for TDM operation. Indicates number of channels transmitted
19 or received over one serializer.
20 - serial-dir : A list of serializer configuration. Each entry is a number
21 indication for serializer pin direction.
22 (0 - INACTIVE, 1 - TX, 2 - RX)
23 - dmas: two element list of DMA controller phandles and DMA request line
25 - dma-names: identifier string for each DMA request line in the dmas property.
26 These strings correspond 1:1 with the ordered pairs in dmas. The dma
27 identifiers must be "rx" and "tx".
31 - ti,hwmods : Must be "mcasp<n>", n is controller instance starting 0
32 - tx-num-evt : FIFO levels.
33 - rx-num-evt : FIFO levels.
34 - dismod : Specify the drive on TX pin during inactive slots
38 Defaults to 'logic low' when the property is not present
39 - sram-size-playback : size of sram to be allocated during playback
40 - sram-size-capture : size of sram to be allocated during capture
41 - interrupts : Interrupt numbers for McASP
42 - interrupt-names : Known interrupt names are "tx" and "rx"
43 - pinctrl-0: Should specify pin control group used for this controller.
44 - pinctrl-names: Should contain only one value - "default", for more details
45 please refer to pinctrl-bindings.txt
46 - fck_parent : Should contain a valid clock name which will be used as parent
48 - auxclk-fs-ratio: When McASP is bus master indicates the ratio between AUCLK
49 and FS rate if applicable:
50 AUCLK rate = auxclk-fs-ratio * FS rate
52 Optional GPIO support:
53 If any McASP pin need to be used as GPIO then the McASP node must have:
59 When requesting a GPIO, the first parameter is the PIN index in McASP_P*
61 For example to request the AXR2 pin of mcasp8:
62 function-gpios = <&mcasp8 2 0>;
64 Or to request the ACLKR pin of mcasp8:
65 function-gpios = <&mcasp8 29 0>;
67 For generic gpio information, please refer to bindings/gpio/gpio.txt
71 mcasp0: mcasp0@1d00000 {
72 compatible = "ti,da830-mcasp-audio";
73 reg = <0x100000 0x3000>;
75 interrupts = <82>, <83>;
76 interrupt-names = "tx", "rx";
77 op-mode = <0>; /* MCASP_IIS_MODE */
80 0 0 0 0 /* 0: INACTIVE, 1: TX, 2: RX */