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microchip,ksz8794 (on spi bus)

Vendor: Microchip Technology Inc.

Description

KSZ8794 ethernet switch with SPI interface

Properties

Top level properties

These property descriptions apply to “microchip,ksz8794” nodes themselves. This page also describes child node properties in the following sections.

Properties not inherited from the base binding file.

Name

Type

Details

workaround

int

Define the applied workaround for the switch used for
short connections. Use bitmask to select the workaround or more
0x01: Short Cable Problems with the KSZ8795 Family
0x02: 1) CAT-5E/6 Short Cable with a Link Issue for the KSZ8795 Family
0x04: 2) CAT-5E/6 Short Cable with a Link Issue for the KSZ8795 Family

mii-lowspeed-drivestrength

int

Define the Low-Speed Interface Drive Strength for MII and RMMI
Supported values 2,4,8,12,16,20,24,28mA
see Register 163 (0xA3): Global Control 20 for more details

Legal values: 2, 4, 8, 12, 16, 20, 24, 28

dsa-master-port

phandle

Phandle to master port.

dsa-slave-ports

int

Number of slave ports on the switch

spi-cpha

boolean

Set to indicate phase starts with asserted half-phase (CPHA=1).
For this driver using this property requires also using cpol.

spi-cpol

boolean

Set to indicate clock leading edge is falling (CPOL=1).
For this driver using this property requires also using cpha.

reset-gpios

phandle-array

The pin is asserted for 10ms during boot to reset the KSZ8794.

spi-max-frequency

int

Maximum clock frequency of device's SPI interface in Hz

This property is required.

duplex

int

Duplex mode, full or half. By default it's always full duplex thus 0
as this is, by far, the most common mode.
Use the macros not the actual enum value, here is the concordance
list (see dt-bindings/spi/spi.h)
  0    SPI_FULL_DUPLEX
  2048 SPI_HALF_DUPLEX

Legal values: 0, 2048

frame-format

int

Motorola or TI frame format. By default it's always Motorola's,
thus 0 as this is, by far, the most common format.
Use the macros not the actual enum value, here is the concordance
list (see dt-bindings/spi/spi.h)
  0     SPI_FRAME_FORMAT_MOTOROLA
  32768 SPI_FRAME_FORMAT_TI

Legal values: 0, 32768

supply-gpios

phandle-array

GPIO specifier that controls power to the device.

This property should be provided when the device has a dedicated
switch that controls power to the device.  The supply state is
entirely the responsibility of the device driver.

Contrast with vin-supply.

vin-supply

phandle

Reference to the regulator that controls power to the device.
The referenced devicetree node must have a regulator compatible.

This property should be provided when device power is supplied
by a shared regulator.  The supply state is dependent on the
request status of all devices fed by the regulator.

Contrast with supply-gpios.  If both properties are provided
then the regulator must be requested before the supply GPIOS is
set to an active state, and the supply GPIOS must be set to an
inactive state before releasing the regulator.

Child node properties

Name

Type

Details

label

string

This property is required.

See Important properties for more information.

local-mac-address

uint8-array

Specifies the MAC address that was assigned to the port