编辑设备树以禁用驱动程序加载

Question

下面是设备树的一部分。

ps7_ethernet_0: ps7-ethernet@e000b000 {
    #address-cells = <1>;
    #size-cells = <0>;
    clock-names = "ref_clk", "aper_clk";
    clocks = <&clkc 13>, <&clkc 30>;
    /* compatible = "xlnx,ps7-ethernet-1.00.a";*/
    interrupt-parent = <&ps7_scugic_0>;
    interrupts = <0 22 4>;
    local-mac-address = [ 00 0a 35 00 6a 3e ];
    phy-handle = <&phy0>;
    phy-mode = "rgmii-id";
    reg = <0xe000b000 0x1000>;
    xlnx,enet-reset = "MIO 11";
    xlnx,eth-mode = <0x1>;
    xlnx,has-mdio = <0x1>;
    xlnx,ptp-enet-clock = <111111115>;
    mdio {
            #address-cells = <1>;
            #size-cells = <0>;
            phy0: phy@7 {
                    compatible = "marvell,88e1116r";
                    device_type = "ethernet-phy";
                    reg = <7>;
            } ;
    } ;
} ;

这表明操作系统将加载以太网驱动程序。我想阻止操作系统这么做。当我简单地对整个块进行注释时，请报告错误。那么，我如何编辑设备树，以便禁用以太网而不加载drievr？

Answer 1

可以通过添加以下内容禁用设备节点：

ps7_ethernet_0: ps7-ethernet@e000b000 {
    ...
    status = "disabled";
};

根据设备树的包含结构，您应该在板规范级别添加此结构。否则，status = "disabled";可能会被某个status = "okay";覆盖。