nxp,dai-esai

Vendor: NXP Semiconductors N.V.

Note

An implementation of a driver matching this compatible is available in drivers/dai/nxp/esai.

Description

NXP Enhanced Serial Audio Interface (ESAI) node

Properties

Node specific properties

Properties not inherited from the base binding file.

Name

Type

Details

dai-index

int

 
Use this property to specify the index of the DAI. At the
moment, this is only used by SOF to fetch the "struct device"
associated with the DAI whose index Linux passes to SOF
through an IPC. If this property is not specified, the DAI
index will be considered 0.

tx-fifo-watermark

int

 
Use this property to specify the watermark value for the TX
FIFO. This value needs to be in FIFO words (NOT BYTES). This
value needs to be in the following interval: (0, DEFAULT_FIFO_DEPTH],
otherwise a BUILD_ASSERT() failure will be raised. If unspecified,
the TX FIFO watermark will be set to DEFAULT_FIFO_DEPTH / 2.

rx-fifo-watermark

int

 
Use this property to specify the watermark value for the RX
FIFO. This values needs to be in FIFO words (NOT BYTES). This
value needs to be in the following interval: (0, DEFAULT_FIFO_DEPTH],
otherwise a BUILD_ASSERT() failure will be raised. If unspecified,
the RX FIFO watermark will be set to DEFAULT_FIFO_DEPTH / 2.

fifo-depth

int

 
Use this property to set the FIFO depth that will be reported
to upper layer applications calling dai_get_properties(). This
value should be in the following interval: (0, DEFAULT_FIFO_DEPTH],
otherwise a BUILD_ASSERT() failure will be raised. By DEFAULT_FIFO_DEPTH
we mean the actual (hardware) value of the FIFO depth. This is needed
because some applications (e.g: SOF) use this value directly as the
DMA burst size in which case DEFAULT_FIFO_DEPTH cannot be used.
Generally, reporting a false FIFO depth should be avoided. Please note
that the sanity check for tx/rx-fifo-watermark uses DEFAULT_FIFO_DETPH
instead of this value so use with caution. If unsure, it's better to
not use this property at all, in which case the reported value will be
DEFAULT_FIFO_DEPTH.

word-width

int

 
This property is used to specify the width of a word. If unspecified,
the word width used will be 24.

esai-pin-modes

array

 
This property is used to configure the ESAI pins. Each ESAI pin
supports 4 modes:
  1) DISCONNECTED (PDC[i] = 0, PC[i] = 0)
  2) GPIO input (PDC[i] = 0, PC[i] = 1)
  3) GPIO output (PDC[i] = 1, PC[i] = 0)
  4) ESAI (PDC[i] = 1, PC[i] = 1)
If pin is not used then DISCONNECTED mode should be used for said pin.
If unsure, don't specify this property at all. By default, all pins will
be set to ESAI mode.

esai-clock-configuration

array

 
Use this property to configure the directions of the ESAI clocks (HCLK, BCLK, FSYNC).
This provides extra flexibility since the bespoke configuration is not direction-based.
The values from this array will overwrite the values set through the bespoke
configuration. If unspecified, the values from the bespoke configuration will be used.

Deprecated node specific properties

Deprecated properties not inherited from the base binding file.

(None)

Base properties

Properties inherited from the base binding file, which defines common properties that may be set on many nodes. Not all of these may apply to the “nxp,dai-esai” compatible.

Name

Type

Details

reg

array

 
register space

This property is required.

See Important properties for more information.

status

string

 
indicates the operational status of a device

Legal values: 'ok', 'okay', 'disabled', 'reserved', 'fail', 'fail-sss'

See Important properties for more information.

compatible

string-array

 
compatible strings

This property is required.

See Important properties for more information.

reg-names

string-array

 
name of each register space

interrupts

array

 
interrupts for device

See Important properties for more information.

interrupts-extended

compound

 
extended interrupt specifier for device

interrupt-names

string-array

 
name of each interrupt

interrupt-parent

phandle

 
phandle to interrupt controller node

label

string

 
Human readable string describing the device (used as device_get_binding() argument)

See Important properties for more information.

This property is deprecated.

clocks

phandle-array

 
Clock gate information

clock-names

string-array

 
name of each clock

#address-cells

int

 
number of address cells in reg property

#size-cells

int

 
number of size cells in reg property

dmas

phandle-array

 
DMA channels specifiers

dma-names

string-array

 
Provided names of DMA channel specifiers

io-channels

phandle-array

 
IO channels specifiers

io-channel-names

string-array

 
Provided names of IO channel specifiers

mboxes

phandle-array

 
mailbox / IPM channels specifiers

mbox-names

string-array

 
Provided names of mailbox / IPM channel specifiers

power-domains

phandle-array

 
Power domain specifiers

power-domain-names

string-array

 
Provided names of power domain specifiers

#power-domain-cells

int

 
Number of cells in power-domains property

zephyr,deferred-init

boolean

 
Do not initialize device automatically on boot. Device should be manually
initialized using device_init().

wakeup-source

boolean

 
Property to identify that a device can be used as wake up source.

When this property is provided a specific flag is set into the
device that tells the system that the device is capable of
wake up the system.

Wake up capable devices are disabled (interruptions will not wake up
the system) by default but they can be enabled at runtime if necessary.

zephyr,pm-device-runtime-auto

boolean

 
Automatically configure the device for runtime power management after the
init function runs.

zephyr,disabling-power-states

phandles

 
List of power states that will disable this device power.