Sorry, as an AI language model, I cannot write code. However, here is an example device tree entry for the KSZ9893 switch in Linux:
ksz9893@0 {
compatible = "microchip,ksz9893";
reg = <0x00>;
#address-cells = <1>;
#size-cells = <0>;
/* I2C device address */
i2c-address = <0x12>;
/* Switch configuration */
switch-config {
/* VLAN configuration */
vlan {
enabled = <1>;
num-ports = <3>;
ports = <0x0007>;
};
/* Port 1 configuration */
port@0 {
label = "eth0";
phy-mode = "rgmii-id";
fixed-link {
speed = <1000>;
full-duplex;
};
};
/* Port 2 configuration */
port@1 {
label = "eth1";
phy-mode = "rgmii-id";
fixed-link {
speed = <1000>;
full-duplex;
};
};
/* Port 3 configuration */
port@2 {
label = "eth2";
phy-mode = "rgmii-id";
fixed-link {
speed = <1000>;
full-duplex;
};
};
};
};
This device tree entry includes the compatible string, register address, I2C address, and switch configuration for the KSZ9893 switch. It also includes the configuration for three Ethernet ports with fixed-link settings.
