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nordic,nrf-pdm

Vendor: Nordic Semiconductor

Description

Nordic PDM (Pulse Density Modulation interface)

Properties

Properties not inherited from the base binding file.

Name

Type

Details

clk-pin

int

IMPORTANT: This option will only be used if the new pin control driver
is not enabled. It will be deprecated in the future.

The CLK pin to use.

For pins P0.0 through P0.31, use the pin number. For example,
to use P0.16 for CLK, set:

    clk-pin = <16>;

For pins P1.0 through P1.31, add 32 to the pin number. For
example, to use P1.2 for CLK, set:

    clk-pin = <34>;  /* 32 + 2 */

din-pin

int

IMPORTANT: This option will only be used if the new pin control driver
is not enabled. It will be deprecated in the future.

The DIN pin to use. The pin numbering scheme is the same as
the clk-pin property's.

clock-source

string

Clock source to be used by the PDM peripheral. The following options
are available:
- "PCLK32M": 32 MHz peripheral clock, synchronous to HFCLK
- "PCLK32M_HFXO": PCLK32M running off the 32 MHz crystal oscillator
  (HFXO) for better clock accuracy and jitter performance
- "ACLK": Audio PLL clock with configurable frequency (frequency for
  this clock must be set via the "hfclkaudio-frequency" property
  in the "nordic,nrf-clock" node); this clock source is only available
  in the nRF53 Series SoCs and it requires the use of HFXO

Default value: PCLK32M_HFXO

Legal values: 'PCLK32M', 'PCLK32M_HFXO', 'ACLK'

queue-size

int

Size of the queue of received audio data blocks to be used
by the driver.

Default value: 4

pinctrl-0

phandles

Pin configuration/s for the first state. Content is specific to the
selected pin controller driver implementation.

pinctrl-1

phandles

Pin configuration/s for the second state. See pinctrl-0.

pinctrl-2

phandles

Pin configuration/s for the third state. See pinctrl-0.

pinctrl-3

phandles

Pin configuration/s for the fourth state. See pinctrl-0.

pinctrl-4

phandles

Pin configuration/s for the fifth state. See pinctrl-0.

pinctrl-names

string-array

Names for the provided states. The number of names needs to match the
number of states.