nxp,dai-esai
Vendor: NXP Semiconductors
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
Properties not inherited from the base binding file.
Name |
Type |
Details |
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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.
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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.
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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.
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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.
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This property is used to specify the width of a word. If unspecified,
the word width used will be 24.
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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.
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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.
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Deprecated properties not inherited from the base binding file.
(None)
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 |
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register space
This property is required. See Important properties for more information. |
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indicates the operational status of a device
Legal values: See Important properties for more information. |
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compatible strings
This property is required. See Important properties for more information. |
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name of each register space
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interrupts for device
See Important properties for more information. |
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extended interrupt specifier for device
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name of each interrupt
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phandle to interrupt controller node
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Human readable string describing the device (used as device_get_binding() argument)
See Important properties for more information. This property is deprecated. |
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Clock gate information
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name of each clock
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number of address cells in reg property
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number of size cells in reg property
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DMA channels specifiers
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Provided names of DMA channel specifiers
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IO channels specifiers
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Provided names of IO channel specifiers
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mailbox / IPM channels specifiers
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Provided names of mailbox / IPM channel specifiers
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Power domain specifiers
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Provided names of power domain specifiers
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Number of cells in power-domains property
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Do not initialize device automatically on boot. Device should be manually
initialized using device_init().
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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.
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Automatically configure the device for runtime power management after the
init function runs.
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List of power states that will disable this device power.
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