intel,penwell-spi

Vendor: Intel Corporation

Note

An implementation of a driver matching this compatible is available in drivers/spi/spi_pw.c.

Description

These nodes are “spi” bus nodes.

Intel Penwell SPI

Properties

Node specific properties

Properties not inherited from the base binding file.

Name

Type

Details

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.

This property is required.

pw,cs-mode

int

 
Chip select configuration. possible values:
0: Hardware
1: Software
2: GPIO

This property is required.

pw,cs-output

int

 
Use GSPI chip select CS0 or CS1. GSPI 0, 1 & 2 instance supports both chip selects.
It can be configured with this DTS property. By default, CS0 is set.
Chip select output possible values:
0: CS0
1: CS1

This property is required.

pw,fifo-depth

int

 
SPI controller with embedded Tx and Rx FIFOs.

This property is required.

clock-frequency

int

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

overrun-character

int

 
The overrun character (ORC) is used when all bytes from the TX buffer
are sent, but the transfer continues due to RX.

vendor-id

int

 
Vendor ID of the device

device-id

int

 
Device ID of the device

class-rev

int

 
Optional class/revision register filter

class-rev-mask

int

 
Class/revision register mask

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 “intel,penwell-spi” compatible.

Name

Type

Details

interrupts

array

 
interrupts for device

This property is required.

See Important properties for more information.

#address-cells

int

 
number of address cells in reg property

This property is required.

Constant value: 1

#size-cells

int

 
number of size cells in reg property

This property is required.

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

array

 
register space

See Important properties for more information.

reg-names

string-array

 
name of each register space

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

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.