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nordic,nrf-spis

Vendor: Nordic Semiconductor

Description

These nodes are “spi” bus nodes.

Nordic nRF family SPIS (SPI slave with EasyDMA)

Properties

Properties not inherited from the base binding file.

Name

Type

Details

csn-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 CSN pin to use. The pin numbering scheme is the same as
the sck-pin property's.

def-char

int

Default character. Character clocked out when the slave was not
provided with buffers and is ignoring the transaction.

This property is required.

sck-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 SCK pin to use.

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

    sck-pin = <16>;

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

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

mosi-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 MOSI pin to use. The pin numbering scheme is the same as
the sck-pin property's.

miso-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 MISO pin to use. The pin numbering scheme is the same as
the sck-pin property's.

clock-frequency

int

Clock frequency the SPI peripheral is being driven at, in Hz.

cs-gpios

phandle-array

An array of chip select GPIOs to use. Each element
in the array specifies a GPIO. The index in the array
corresponds to the child node that the CS gpio controls.

Example:

  spi@... {
          cs-gpios = <&gpio0 23 GPIO_ACTIVE_LOW>,
                        <&gpio1 10 GPIO_ACTIVE_LOW>,
                        ...;

          spi-device@0 {
                  reg = <0>;
                  ...
          };
          spi-device@1 {
                  reg = <1>;
                  ...
          };
          ...
  };

The child node "spi-device@0" specifies a SPI device with
chip select controller gpio0, pin 23, and devicetree
GPIO flags GPIO_ACTIVE_LOW. Similarly, "spi-device@1" has CS GPIO
controller gpio1, pin 10, and flags GPIO_ACTIVE_LOW. Additional
devices can be configured in the same way.

If unsure about the flags cell, GPIO_ACTIVE_LOW is generally a safe
choice for a typical "CSn" pin. GPIO_ACTIVE_HIGH may be used if
intervening hardware inverts the signal to the peripheral device or
the line itself is active high.

If this property is not defined, no chip select GPIOs are set.
SPI controllers with dedicated CS pins do not need to define
the cs-gpios property.

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.