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-Texas Instruments McASP controller
-
-Required properties:
-- compatible :
- "ti,dm646x-mcasp-audio" : for DM646x platforms
- "ti,da830-mcasp-audio" : for both DA830 & DA850 platforms
- "ti,am33xx-mcasp-audio" : for AM33xx platforms (AM33xx, AM43xx, TI81xx)
- "ti,dra7-mcasp-audio" : for DRA7xx platforms
- "ti,omap4-mcasp-audio" : for OMAP4
-
-- reg : Should contain reg specifiers for the entries in the reg-names property.
-- reg-names : Should contain:
- * "mpu" for the main registers (required). For compatibility with
- existing software, it is recommended this is the first entry.
- * "dat" for separate data port register access (optional).
-- op-mode : I2S/DIT ops mode. 0 for I2S mode. 1 for DIT mode used for S/PDIF,
- IEC60958-1, and AES-3 formats.
-- tdm-slots : Slots for TDM operation. Indicates number of channels transmitted
- or received over one serializer.
-- serial-dir : A list of serializer configuration. Each entry is a number
- indication for serializer pin direction.
- (0 - INACTIVE, 1 - TX, 2 - RX)
-- dmas: two element list of DMA controller phandles 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. The dma
- identifiers must be "rx" and "tx".
-
-Optional properties:
-
-- ti,hwmods : Must be "mcasp<n>", n is controller instance starting 0
-- tx-num-evt : FIFO levels.
-- rx-num-evt : FIFO levels.
-- dismod : Specify the drive on TX pin during inactive slots
- 0 : 3-state
- 2 : logic low
- 3 : logic high
- Defaults to 'logic low' when the property is not present
-- sram-size-playback : size of sram to be allocated during playback
-- sram-size-capture : size of sram to be allocated during capture
-- interrupts : Interrupt numbers for McASP
-- interrupt-names : Known interrupt names are "tx" and "rx"
-- 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
-- fck_parent : Should contain a valid clock name which will be used as parent
- for the McASP fck
-- auxclk-fs-ratio: When McASP is bus master indicates the ratio between AUCLK
- and FS rate if applicable:
- AUCLK rate = auxclk-fs-ratio * FS rate
-
-Optional GPIO support:
-If any McASP pin need to be used as GPIO then the McASP node must have:
-...
- gpio-controller
- #gpio-cells = <2>;
-...
-
-When requesting a GPIO, the first parameter is the PIN index in McASP_P*
-registers.
-For example to request the AXR2 pin of mcasp8:
-function-gpios = <&mcasp8 2 0>;
-
-Or to request the ACLKR pin of mcasp8:
-function-gpios = <&mcasp8 29 0>;
-
-For generic gpio information, please refer to bindings/gpio/gpio.txt
-
-Example:
-
-mcasp0: mcasp0@1d00000 {
- compatible = "ti,da830-mcasp-audio";
- reg = <0x100000 0x3000>;
- reg-names "mpu";
- interrupts = <82>, <83>;
- interrupt-names = "tx", "rx";
- op-mode = <0>; /* MCASP_IIS_MODE */
- tdm-slots = <2>;
- serial-dir = <
- 0 0 0 0 /* 0: INACTIVE, 1: TX, 2: RX */
- 0 0 0 0
- 0 0 0 1
- 2 0 0 0 >;
- tx-num-evt = <1>;
- rx-num-evt = <1>;
-};