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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/sound/davinci-mcasp-audio.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: McASP Controller for TI SoCs
maintainers:
- Jayesh Choudhary <j-choudhary@ti.com>
properties:
compatible:
enum:
- ti,dm646x-mcasp-audio
- ti,da830-mcasp-audio
- ti,am33xx-mcasp-audio
- ti,dra7-mcasp-audio
- ti,omap4-mcasp-audio
reg:
minItems: 1
items:
- description: CFG registers
- description: data registers
reg-names:
minItems: 1
items:
- const: mpu
- const: dat
op-mode:
$ref: /schemas/types.yaml#/definitions/uint32
description: 0 - I2S or 1 - DIT operation mode
enum:
- 0
- 1
tdm-slots:
$ref: /schemas/types.yaml#/definitions/uint32
description:
number of channels over one serializer
the property is ignored in DIT mode
minimum: 2
maximum: 32
serial-dir:
description:
A list of serializer configuration
Entry is indication for serializer pin direction
0 - Inactive, 1 - TX, 2 - RX
All AXR pins should be present in the array even if inactive
$ref: /schemas/types.yaml#/definitions/uint32-array
minItems: 1
maxItems: 25
items:
minimum: 0
maximum: 2
dmas:
minItems: 1
items:
- description: transmission DMA channel
- description: reception DMA channel
dma-names:
minItems: 1
items:
- const: tx
- const: rx
ti,hwmods:
$ref: /schemas/types.yaml#/definitions/string
description: Name of hwmod associated with McASP
maxItems: 1
deprecated: true
tx-num-evt:
$ref: /schemas/types.yaml#/definitions/uint32
description:
configures WFIFO threshold
0 disables the FIFO use
if property is missing, then also FIFO use is disabled
rx-num-evt:
$ref: /schemas/types.yaml#/definitions/uint32
description:
configures RFIFO threshold
0 disables the FIFO use
if property is missing, then also FIFO use is disabled
dismod:
$ref: /schemas/types.yaml#/definitions/uint32
description:
specify the drive on TX pin during inactive time slots
0 - 3-state, 2 - logic low, 3 - logic high
enum:
- 0
- 2
- 3
default: 2
interrupts:
anyOf:
- minItems: 1
items:
- description: TX interrupt
- description: RX interrupt
- items:
- description: common/combined interrupt
interrupt-names:
oneOf:
- minItems: 1
items:
- const: tx
- const: rx
- const: common
fck_parent:
$ref: /schemas/types.yaml#/definitions/string
description: parent clock name for McASP fck
maxItems: 1
auxclk-fs-ratio:
$ref: /schemas/types.yaml#/definitions/uint32
description: ratio of AUCLK and FS rate if applicable
gpio-controller: true
"#gpio-cells":
const: 2
clocks:
minItems: 1
items:
- description: functional clock
- description: module specific optional ahclkx clock
- description: module specific optional ahclkr clock
clock-names:
minItems: 1
items:
- const: fck
- const: ahclkx
- const: ahclkr
power-domains:
description: phandle to the corresponding power-domain
maxItems: 1
"#sound-dai-cells":
const: 0
port:
description: connection for when McASP is used via graph card
type: object
required:
- compatible
- reg
- reg-names
- dmas
- dma-names
- interrupts
- interrupt-names
allOf:
- if:
properties:
opmode:
enum:
- 0
then:
required:
- tdm-slots
additionalProperties: false
examples:
- |
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>;
dmas = <&main_udmap 0xc400>, <&main_udmap 0x4400>;
dma-names = "tx", "rx";
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>;
};
|
