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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. This property
specifies the TX playback TDM slot count, along with default RX slot count
if tdm-slots-rx is not specified.
The property is ignored in DIT mode.
minimum: 2
maximum: 32
tdm-slots-rx:
$ref: /schemas/types.yaml#/definitions/uint32
description:
Number of RX capture channels over one serializer. If specified,
allows independent RX TDM slot count separate from TX. Requires
ti,async-mode to be enabled for independent TX/RX clock rates.
The property is ignored in DIT mode.
minimum: 2
maximum: 32
ti,async-mode:
description:
Specify to allow independent TX & RX clocking,
to enable audio playback & record with different sampling rate,
and different number of bits per frame.
if property is omitted, TX and RX will share same bit clock and frame clock signals,
thus RX need to use same bits per frame and sampling rate as TX in synchronous mode.
the property is ignored in DIT mode (as DIT is TX-only)
type: boolean
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:
minItems: 1
maxItems: 2
interrupt-names:
oneOf:
- description: TX interrupt
const: tx
- description: RX interrupt
const: rx
- description: TX and RX interrupts
items:
- const: tx
- const: rx
- description: Common/combined interrupt
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. This property specifies
the TX ratio, along with default RX ratio if auxclk-fs-ratio-rx
is not specified.
When not specified, the inputted system clock frequency via set_sysclk
callback by the machine driver is used for divider calculation.
auxclk-fs-ratio-rx:
$ref: /schemas/types.yaml#/definitions/uint32
description:
Ratio of AUCLK and FS rate for RX. If specified, allows
for a different RX ratio. Requires ti,async-mode to be
enabled when the ratio differs from auxclk-fs-ratio.
When not specified, it defaults to the value of auxclk-fs-ratio.
The property is ignored in DIT mode.
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:
- $ref: dai-common.yaml#
- if:
properties:
op-mode:
enum:
- 0
then:
required:
- tdm-slots
- if:
properties:
op-mode:
const: 1
then:
properties:
tdm-slots: false
tdm-slots-rx: false
ti,async-mode: false
auxclk-fs-ratio-rx: false
- if:
required:
- tdm-slots-rx
then:
required:
- ti,async-mode
- if:
required:
- auxclk-fs-ratio-rx
then:
required:
- ti,async-mode
unevaluatedProperties: 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>;
ti,async-mode;
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>;
};
|
