Hi,

I'm working on bringing up a SOM. I can boot it into Linux (Yocto build) and I have network access via a Realtex USB -> Ethernet dongle. The board that the SOM sits on, has two PHY chips of type VSC8531 and i patch the device tree with the following
patch:
[dts-patch]
+&eth0 {
+ phy0: ethernet-phy@7 {
+ compatible = "ethernet-phy-ieee802.3-c45";
+ reg = <7>;
+ vsc8531,vddmac = <1800>;
+ vsc8531,edge-slowdown = <0>;
+ vsc8531,led-0-mode = <VSC8531_LINK_1000_ACTIVITY>;
+ vsc8531,led-1-mode = <VSC8531_LINK_100_ACTIVITY>;
+ };
+};
+
+&eth1 {
+ phy1: ethernet-phy@7 {
+ compatible = "ethernet-phy-ieee802.3-c45";
+ reg = <7>;
+ vsc8531,vddmac = <1800>;
+ vsc8531,edge-slowdown = <0>;
+ vsc8531,led-0-mode = <VSC8531_LINK_1000_ACTIVITY>;
+ vsc8531,led-1-mode = <VSC8531_LINK_100_ACTIVITY>;
+ };
+};
[/dts-patch]
When I boot the system, devices eth0 & eth1 appear like:
[ip link]
4: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
link/ether 7a:fb:90:5e:ff:90 brd ff:ff:ff:ff:ff:ff
5: eth1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop qlen 1000
link/ether 26:4e:be:df:c3:96 brd ff:ff:ff:ff:ff:ff
/ip link]
but ethtool says for eth0 & eth1 the following:
# ethtool eth0
Settings for eth0:
Cannot get device settings: No such device
Supports Wake-on: g
Wake-on: d
Current message level: 0x000000cc (204)
link timer rx_err tx_err
Link detected: no
it appears like a MAC has been assigned but when I plug-in a network cable, the link won't come up. I have tried the following (after the RJ-45 was plugged-in):
# ifconfig eth0 up
[ 1204.926217] ravb 11c20000.ethernet eth0: failed to connect PHY
ifconfig: SIOCSIFFLAGS: No such file or directory
# ifconfig eth1 up
[ 1208.334088] ravb 11c30000.ethernet eth1: failed to connect PHY
ifconfig: SIOCSIFFLAGS: No such file or directory

# networkctl status
just says: "State: no-carrier"

kernel:
I have added to the config:
CONFIG_MICROSEMI_PHY=y
before I compiled the kernel

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