nxp,dmic
Vendor: NXP Semiconductors
Note
An implementation of a driver matching this compatible is available in drivers/audio/dmic_mcux.c.
Description
NXP DMIC
Properties
Top level properties
These property descriptions apply to “nxp,dmic” nodes themselves. This page also describes child node properties in the following sections.
Properties not inherited from the base binding file.
Name |
Type |
Details |
|---|---|---|
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Pin configuration/s for the first state. Content is specific to the
selected pin controller driver implementation.
This property is required. |
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Use 2FS output, and bypass final half band decimator. This will reduce
the required PDM bit clock frequency by a factor of two, and can reduce
power consumption.
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Pin configuration/s for the second state. See pinctrl-0.
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Pin configuration/s for the third state. See pinctrl-0.
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Pin configuration/s for the fourth state. See pinctrl-0.
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Pin configuration/s for the fifth state. See pinctrl-0.
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Names for the provided states. The number of names needs to match the
number of states.
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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,dmic” compatible.
Name |
Type |
Details |
|---|---|---|
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register space
This property is required. See Important properties for more information. |
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interrupts for device
This property is required. See Important properties for more information. |
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Clock gate information
This property is required. |
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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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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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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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Child node properties
Name |
Type |
Details |
|---|---|---|
|
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register space
This property is required. See Important properties for more information. |
|
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DMA channels specifiers
This property is required. |
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Decimator gain shift. Sets the number of bits to shift decimated PCM
data by, as a positive or negative number. Range of [-15,15]. Default
is reset value of register
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2FS compensation filter. See SOC reference manual for filter response
of each value. Default value is reset value of register, and
recommended filter setting.
Default value: Legal values: |
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4FS compensation filter. See SOC reference manual for filter response
of each value. Default value is reset value of register, and
recommended filter setting.
Default value: Legal values: |
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DC cutoff filter setting. Default is reset value of register. Note that
each cutoff frequency is based on a sample frequency of 16KHz, so
actual cutoff values will scale up or down based on your sampling
frequency
Default value: Legal values: |
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DC gain fine adjustment. Number of bits to downshift the final
conversion result. Max value of 15. Default is reset value of
register
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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. |
|
|
name of each register space
|
|
|
interrupts for device
See Important properties for more information. |
|
|
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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Provided names of DMA channel specifiers
|
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|
IO channels specifiers
|
|
|
Provided names of IO channel specifiers
|
|
|
mailbox / IPM channels specifiers
|
|
|
Provided names of mailbox / IPM channel specifiers
|
|
|
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().
|
|
|
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.
|
|
|
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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