atmel,sam0-gmac

Vendor: Atmel Corporation

Description

Atmel SAM0-family GMAC Ethernet

Properties

Properties not inherited from the base binding file.

Name

Type

Details

num-queues

int

 
Number of hardware TX and RX queues.

This property is required.

max-frame-size

int

 
Maximum ethernet frame size.  The current ethernet frame sizes
supported by hardware are 1518, 1536 and 10240 (jumbo frames).  This
means that normally gmac will reject any frame above max-frame-size
value.  The default value is 1518, which represents an usual
IEEE 802.3 ethernet frame:

  Ethernet Frame [ 14 MAC HEADER | 1500 MTU | 4 FCS ] = 1518 bytes

When using value 1536 it is possible extend ethernet MAC HEADER up
to 32 bytes.  The hardware have support to jumbo frames and it can be
enabled by selecting the value 10240.

Default value: 1518

max-speed

int

 
This specifies maximum speed in Mbit/s supported by the device.  The
gmac driver supports 10Mbit/s and 100Mbit/s.  Using 100, as default
value, enables driver to configure 10 and 100Mbit/s speeds.

Default value: 100

phy-connection-type

string

 
Phy connection type define the physical interface connection between
PHY and MAC.  The default value uses gmac register reset value, which
represents Reduced Media-Independent Interface (RMII) mode.

This property must be used with pinctrl-0.

Default value: rmii

Legal values: 'rmii', 'mii'

pinctrl-0

phandles

 
PIO pin configuration for the various GMAC signals that include GTXCK,
GTXEN, GTX[3..0], GTXER, GRXCK, GRXDV, GRX[3..0], GRXER, GCRS, GCOL,
GMDC, and GMDIO.  Which signals are used vary based on if the PHY
connection is MII or RMII (see datasheet for more details).  We expect
that the phandles will reference pinctrl nodes.  These nodes will have
a nodelabel that matches the Atmel SoC HAL defines and be of the form
p<port><pin><periph>_<inst>_<signal>.

For example the GMAC on SAME7x would be for RMII
  pinctrl-0 = <&pd0a_gmac_gtxck &pd1a_gmac_gtxen
               &pd2a_gmac_gtx0 &pd3a_gmac_gtx1
               &pd4a_gmac_grxdv &pd5a_gmac_grx0
               &pd6a_gmac_grx1 &pd7a_gmac_grxer
               &pd8a_gmac_gmdc &pd9a_gmac_gmdio>;

This property must be used with phy-connection-type.

local-mac-address

uint8-array

 
Specifies the MAC address that was assigned to the network device

zephyr,random-mac-address

boolean

 
Use a random MAC address generated when the driver is initialized.
Note that using this choice and rebooting a board may leave stale
MAC address in peers' ARP caches and lead to issues and delays in
communication.  (Use "ip neigh flush all" on Linux peers to clear
ARP cache.)

It is driver specific how the OUI octets are handled.

If set we ignore any setting of the local-mac-address property.