IMX6ULL u-boot 2020.04 移植LAN8720A(网卡)

1.修改设备树arch/arm/dts/imx6ul-14x14-evk.dtsi

修改后

&fec1 {pinctrl-names = "default";pinctrl-0 = <&pinctrl_enet1>;phy-mode = "rmii";phy-handle = <&ethphy0>;phy-reset-gpios = <&gpio5 7 GPIO_ACTIVE_LOW>;phy-reset-duration = <50>;phy-reset-post-delay = <15>;status = "okay";
};&fec2 {pinctrl-names = "default";pinctrl-0 = <&pinctrl_enet2>;phy-mode = "rmii";phy-handle = <&ethphy1>;phy-reset-gpios = <&gpio5 8 GPIO_ACTIVE_LOW>;phy-reset-duration = <50>;phy-reset-post-delay = <15>;status = "okay";mdio {#address-cells = <1>;#size-cells = <0>;ethphy0: ethernet-phy@0 {reg = <0>;micrel,led-mode = <1>;clocks = <&clks IMX6UL_CLK_ENET_REF>;clock-names = "rmii-ref";};ethphy1: ethernet-phy@1 {reg = <1>;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 0x1b0b0MX6UL_PAD_ENET1_RX_ER__ENET1_RX_ER   0x1b0b0MX6UL_PAD_ENET1_RX_DATA0__ENET1_RDATA00  0x1b0b0MX6UL_PAD_ENET1_RX_DATA1__ENET1_RDATA01  0x1b0b0MX6UL_PAD_ENET1_TX_EN__ENET1_TX_EN   0x1b0b0MX6UL_PAD_ENET1_TX_DATA0__ENET1_TDATA00  0x1b0b0MX6UL_PAD_ENET1_TX_DATA1__ENET1_TDATA01  0x1b0b0MX6UL_PAD_ENET1_TX_CLK__ENET1_REF_CLK1   0x4001b031MX6UL_PAD_SNVS_TAMPER7__GPIO5_IO07 0x10B0/* ENET1 RESET */>;};pinctrl_enet2: enet2grp {fsl,pins = <MX6UL_PAD_GPIO1_IO07__ENET2_MDC     0x1b0b0MX6UL_PAD_GPIO1_IO06__ENET2_MDIO 0x1b0b0MX6UL_PAD_ENET2_RX_EN__ENET2_RX_EN   0x1b0b0MX6UL_PAD_ENET2_RX_ER__ENET2_RX_ER   0x1b0b0MX6UL_PAD_ENET2_RX_DATA0__ENET2_RDATA00  0x1b0b0MX6UL_PAD_ENET2_RX_DATA1__ENET2_RDATA01  0x1b0b0MX6UL_PAD_ENET2_TX_EN__ENET2_TX_EN   0x1b0b0MX6UL_PAD_ENET2_TX_DATA0__ENET2_TDATA00  0x1b0b0MX6UL_PAD_ENET2_TX_DATA1__ENET2_TDATA01  0x1b0b0MX6UL_PAD_ENET2_TX_CLK__ENET2_REF_CLK2   0x4001b031MX6UL_PAD_SNVS_TAMPER8__GPIO5_IO08 0x10B0 /* ENET2 RESET */>;};

 pinctrl_spi4: spi4grp {fsl,pins = <MX6UL_PAD_BOOT_MODE0__GPIO5_IO10 0x70a1MX6UL_PAD_BOOT_MODE1__GPIO5_IO11  0x70a1>;};

 spi4 {compatible = "spi-gpio";pinctrl-names = "default";pinctrl-0 = <&pinctrl_spi4>;status = "okay";gpio-sck = <&gpio5 11 0>;gpio-mosi = <&gpio5 10 0>;num-chipselects = <1>;#address-cells = <1>;#size-cells = <0>;gpio_spi: gpio@0 {compatible = "fairchild,74hc595";gpio-controller;#gpio-cells = <2>;reg = <0>;registers-number = <1>;registers-default = /bits/ 8 <0x57>;spi-max-frequency = <100000>;};};

2.添加软复位（按照大佬们的说法需要加）

drivers/net/phy/phy.c

int genphy_config_aneg(struct phy_device *phydev)
{int result;/* Soft Reset the PHY */phy_reset(phydev); // add by jr

3.还有就是设置MAC地址，不然不能用

-# CONFIG_NET_RANDOM_ETHADDR is not set
+CONFIG_NET_RANDOM_ETHADDR=y

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