Hello There ,
To utilize dule ethernet for one of our potential project , We have connected 2 Ethernet phy with Imx6ull processor ,
One phy is KSZ8081 and one phy is KSZ8041 , below is our DTS configuration :
&fec1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet1>;
phy-mode = "rmii";
phy-handle = <ðphy0>;
phy-reset-gpios = <&gpio5 9 GPIO_ACTIVE_LOW>;
phy-reset-duration = <26>;
phy-reset-post-delay=<20>;
phy-supply = <®_peri_3v3>;
status = "okay";
};
&fec2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_enet2>;
phy-mode = "rmii";
phy-handle = <ðphy1>;
phy-reset-gpios = <&gpio1 14 GPIO_ACTIVE_LOW>;
//phy-reset-gpios = <&gpio5 6 GPIO_ACTIVE_LOW>;
phy-reset-duration = <26>;
phy-reset-post-delay=<20>;
phy-supply = <®_peri_3v3>;
status = "okay";
mdio {
#address-cells = <1>;
#size-cells = <0>;
ethphy0: ethernet-phy@1 {
reg = <1>;
micrel,led-mode = <1>;
clocks = <&clks IMX6UL_CLK_ENET_REF>;
clock-names = "rmii-ref";
};
ethphy1: ethernet-phy@3 {
reg = <3>;
micrel,led-mode = <1>;
clocks = <&clks IMX6UL_CLK_ENET2_REF>;
clock-names = "rmii-ref";
};
};
};
pinctrl_enet1: enet1grp {
fsl,pins = <
MX6UL_PAD_ENET1_RX_EN__ENET1_RX_EN 0x1b0b0
MX6UL_PAD_ENET1_RX_ER__ENET1_RX_ER 0x1b0b0
MX6UL_PAD_ENET1_RX_DATA0__ENET1_RDATA00 0x1b0b0
MX6UL_PAD_ENET1_RX_DATA1__ENET1_RDATA01 0x1b0b0
MX6UL_PAD_ENET1_TX_EN__ENET1_TX_EN 0x1b0b0
MX6UL_PAD_ENET1_TX_DATA0__ENET1_TDATA00 0x1b0b0
MX6UL_PAD_ENET1_TX_DATA1__ENET1_TDATA01 0x1b0b0
MX6UL_PAD_ENET1_TX_CLK__ENET1_REF_CLK1 0x4001b031
>;
};
pinctrl_enet2: enet2grp {
fsl,pins = <
MX6UL_PAD_GPIO1_IO07__ENET2_MDC 0x1b0b0
MX6UL_PAD_GPIO1_IO06__ENET2_MDIO 0x1b0b0
MX6UL_PAD_ENET2_RX_EN__ENET2_RX_EN 0x1b0b0
MX6UL_PAD_ENET2_RX_ER__ENET2_RX_ER 0x1b0b0
MX6UL_PAD_ENET2_RX_DATA0__ENET2_RDATA00 0x1b0b0
MX6UL_PAD_ENET2_RX_DATA1__ENET2_RDATA01 0x1b0b0
MX6UL_PAD_ENET2_TX_EN__ENET2_TX_EN 0x1b0b0
MX6UL_PAD_ENET2_TX_DATA0__ENET2_TDATA00 0x1b0b0
MX6UL_PAD_ENET2_TX_DATA1__ENET2_TDATA01 0x1b0b0
MX6UL_PAD_ENET2_TX_CLK__ENET2_REF_CLK2 0x4001b031
>;
};
Both The Ethernet Phys are getting detected in kernel logs and also when we connect ethernet cable , link is also getting detected on both.
but Ip is arriving on ethernet which is connected to KSZ8081 phy , the IP is not getting assigned with the Ethernet which is connected to KSZ8084NL.
and there is rx errors are observed in KSZ8041NL Ethernet which is eth0 , below are the logs :
root@sls-imx6ull14x14evk:~# ifconfig
eth0 Link encap:Ethernet HWaddr BA:9C:69:1F:76:3A
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:1065 dropped:0 overruns:0 frame:1065
TX packets:65 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:12024 (11.7 KiB)
eth1 Link encap:Ethernet HWaddr 42:19:11:7F:5E:89
inet addr:10.20.0.184 Bcast:10.20.1.255 Mask:255.255.254.0
inet6 addr: fe80::8248:9837:9647:2a00/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:18 errors:0 dropped:0 overruns:0 frame:0
TX packets:23 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2494 (2.4 KiB) TX bytes:3162 (3.0 KiB)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:17 errors:0 dropped:0 overruns:0 frame:0
TX packets:17 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:2011 (1.9 KiB) TX bytes:2011 (1.9 KiB)
root@sls-imx6ull14x14evk:~# ethtool eth0
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supported pause frame use: Symmetric
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Link partner advertised pause frame use: No
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 100Mb/s
Duplex: Full
Auto-negotiation: on
Port: Twisted Pair
PHYAD: 3
Transceiver: external
MDI-X: Unknown
Supports Wake-on: g
Wake-on: d
Link detected: yes
We have also checked the clock which is 50MHz , which is generated properly and also coming into phy KSZ8041NL.
In short 1 Ethernet with KSZ8081 is working properly but 2nd Ethernet not working with KSZ8041NL.
Please suggest us solution. we have also attached screenshot of both Ethernet phy Hardware for your reference .
