如何在zyxel nbg6817构建中编辑openwrt系统闪存大小

Zyxel NBG6817具有〜4g内置的内置闪存mem，但是rootfs分区当前默认只有64mb。我关注了这篇文章（https://forum.openwrt.org/t/zyxel-armor-z2-nbg6817-3gb-extroot-on-19-07/45376/13），并成功将剩余的〜2.8gb-3.2gb的flash Mem安装到了覆盖层上。但是问题是，当您进行sysupgrade升级时，该擦除了，您必须重新安装并重启路由器。

我想编辑我的openwrt构建，以允许在刷新openwrt时将大部分未使用的闪存mem分配给rootfs，而无需安装用过的空间来覆盖

关于该线程的评论是“我与@slh讨论过，他指出，对于大多数人而言，60MiB的存储空间足以安装软件包，只有很少的人会从增加的存储空间中受益”

我是使用额外的闪存会从中受益的人之一，这就是为什么我购买nbg6817-以获得更大闪存的原因。

我看到过有关通过编辑DTS文件来增加rootfs的flash内存大小的帖子-但是，我在zyxel nbg6817 dts文件中找不到分区json obj的等效文件。

参考文献：
https://forum.openwrt.org/t/flash-memory-architecture/59089
https://forum.openwrt.org/t/how-to-system-flash-size-and-ram/49817

Zyxel nbg6817 dts文件？：
https://github.com/openwrt/openwrt/blob/master/target/linux/ipq806x/files-5.4/arch/arm/boot/dts/qcom-ipq8065-nbg6817.dts

#include "qcom-ipq8065.dtsi"

#include <dt-bindings/input/input.h>

/ {
    model = "ZyXEL NBG6817";
    compatible = "zyxel,nbg6817","qcom,ipq8065",ipq8064";

    memory@0 {
        reg = <0x42000000 0x1e000000>;
        device_type = "memory";
    };

    aliases {
        mdio-gpio0 = &mdio0;
        sdcc1 = &sdcc1;

        led-boot = &power;
        led-failsafe = &power;
        led-running = &power;
        led-upgrade = &power;
    };

    chosen {
        bootargs = "rootfstype=squashfs,ext4 rootwait noinitrd";
        append-rootblock = "root=/dev/mmcblk0p";
    };

    keys {
        compatible = "gpio-keys";
        pinctrl-0 = <&button_pins>;
        pinctrl-names = "default";

        wifi {
            label = "wifi";
            gpios = <&qcom_pinmux 53 GPIO_actIVE_LOW>;
            linux,code = <KEY_RFKILL>;
            linux,input-type = <EV_SW>;
        };

        reset {
            label = "reset";
            gpios = <&qcom_pinmux 54 GPIO_actIVE_LOW>;
            linux,code = <KEY_RESTART>;
        };

        wps {
            label = "wps";
            gpios = <&qcom_pinmux 65 GPIO_actIVE_LOW>;
            linux,code = <KEY_WPS_BUTTON>;
        };
    };

    leds {
        compatible = "gpio-leds";
        pinctrl-0 = <&led_pins>;
        pinctrl-names = "default";

        internet {
            label = "nbg6817:white:internet";
            gpios = <&qcom_pinmux 64 GPIO_actIVE_HIGH>;
        };

        power: power {
            label = "nbg6817:white:power";
            gpios = <&qcom_pinmux 9 GPIO_actIVE_HIGH>;
            default-state = "keep";
        };

        wifi2g {
            label = "nbg6817:amber:wifi2g";
            gpios = <&qcom_pinmux 33 GPIO_actIVE_HIGH>;
        };

        /* wifi2g amber from the manual is missing */

        wifi5g {
            label = "nbg6817:amber:wifi5g";
            gpios = <&qcom_pinmux 26 GPIO_actIVE_HIGH>;
        };

        /* wifi5g amber from the manual is missing */
    };
};

&qcom_pinmux {
    button_pins: button_pins {
        mux {
            pins = "gpio53","gpio54","gpio65";
            function = "gpio";
            drive-strength = <2>;
            bias-pull-up;
        };
    };

    led_pins: led_pins {
        mux {
            pins = "gpio9","gpio26","gpio33","gpio64";
            function = "gpio";
            drive-strength = <2>;
            bias-pull-down;
        };
    };

    mdio0_pins: mdio0_pins {
        clk {
            pins = "gpio1";
            input-disable;
        };
    };

    rgmii2_pins: rgmii2_pins {
        tx {
            pins = "gpio27","gpio28","gpio29","gpio30","gpio31","gpio32" ;
            input-disable;
        };
    };

    spi_pins: spi_pins {
        cs {
            pins = "gpio20";
            drive-strength = <12>;
        };
    };

    usb0_pwr_en_pins: usb0_pwr_en_pins {
        mux {
            pins = "gpio16","gpio17";
            function = "gpio";
            drive-strength = <12>;
        };

        pwr {
            pins = "gpio17";
            bias-pull-down;
            output-high;
        };

        ovc {
            pins = "gpio16";
            bias-pull-up;
        };
    };

    usb1_pwr_en_pins: usb1_pwr_en_pins {
        mux {
            pins = "gpio14","gpio15";
            function = "gpio";
            drive-strength = <12>;
        };

        pwr {
            pins = "gpio14";
            bias-pull-down;
            output-high;
        };

        ovc {
            pins = "gpio15";
            bias-pull-up;
        };
    };
};

&gsbi5 {
    qcom,mode = <GSBI_PROT_SPI>;
    status = "okay";

    spi4: spi@1a280000 {
        status = "okay";

        pinctrl-0 = <&spi_pins>;
        pinctrl-names = "default";

        cs-gpios = <&qcom_pinmux 20 GPIO_actIVE_HIGH>;

        m25p80@0 {
            compatible = "jedec,spi-nor";
            #address-cells = <1>;
            #size-cells = <1>;
            spi-max-frequency = <51200000>;
            reg = <0>;

            partitions {
                compatible = "qcom,smem";
            };
        };
    };
};

&usb3_0 {
    status = "okay";

    pinctrl-0 = <&usb0_pwr_en_pins>;
    pinctrl-names = "default";
};

&usb3_1 {
    status = "okay";

    pinctrl-0 = <&usb1_pwr_en_pins>;
    pinctrl-names = "default";
};

&pcie0 {
    status = "okay";
    reset-gpio = <&qcom_pinmux 3 GPIO_actIVE_LOW>;
    pinctrl-0 = <&pcie0_pins>;
    pinctrl-names = "default";
};

&pcie1 {
    status = "okay";
    reset-gpio = <&qcom_pinmux 48 GPIO_actIVE_LOW>;
    pinctrl-0 = <&pcie1_pins>;
    pinctrl-names = "default";
    max-link-speed = <1>;
};

&mdio0 {
    status = "okay";

    pinctrl-0 = <&mdio0_pins>;
    pinctrl-names = "default";


    phy0: ethernet-phy@0 {
        reg = <0>;
        qca,ar8327-initvals = <
            0x00004 0x7600000   /* PAD0_MODE */
            0x00008 0x1000000   /* PAD5_MODE */
            0x0000c 0x80        /* PAD6_MODE */
            0x000e4 0xaa545     /* MAC_POWER_SEL */
            0x000e0 0xc74164de  /* SGMII_CTRL */
            0x0007c 0x4e        /* PORT0_STATUS */
            0x00094 0x4e        /* PORT6_STATUS */
            0x00970 0x1e864443  /* QM_PORT0_CTRL0 */
            0x00974 0x000001c6  /* QM_PORT0_CTRL1 */
            0x00978 0x19008643  /* QM_PORT1_CTRL0 */
            0x0097c 0x000001c6  /* QM_PORT1_CTRL1 */
            0x00980 0x19008643  /* QM_PORT2_CTRL0 */
            0x00984 0x000001c6  /* QM_PORT2_CTRL1 */
            0x00988 0x19008643  /* QM_PORT3_CTRL0 */
            0x0098c 0x000001c6  /* QM_PORT3_CTRL1 */
            0x00990 0x19008643  /* QM_PORT4_CTRL0 */
            0x00994 0x000001c6  /* QM_PORT4_CTRL1 */
            0x00998 0x1e864443  /* QM_PORT5_CTRL0 */
            0x0099c 0x000001c6  /* QM_PORT5_CTRL1 */
            0x009a0 0x1e864443  /* QM_PORT6_CTRL0 */
            0x009a4 0x000001c6  /* QM_PORT6_CTRL1 */
            >;
    };

    phy4: ethernet-phy@4 {
        reg = <4>;
        qca,ar8327-initvals = <
            0x000e4 0x6a545     /* MAC_POWER_SEL */
            0x0000c 0x80        /* PAD6_MODE */
            >;
    };
};

&gmac1 {
    status = "okay";
    phy-mode = "rgmii";
    qcom,id = <1>;
    qcom,phy_mdio_addr = <4>;
    qcom,poll_required = <0>;
    qcom,rgmii_delay = <1>;
    qcom,phy_mii_type = <0>;
    qcom,emulation = <0>;
    qcom,irq = <255>;
    mdiobus = <&mdio0>;

    pinctrl-0 = <&rgmii2_pins>;
    pinctrl-names = "default";

    fixed-link {
        speed = <1000>;
        full-duplex;
    };
};

&gmac2 {
    status = "okay";
    phy-mode = "sgmii";
    qcom,id = <2>;
    qcom,phy_mdio_addr = <0>;   /* none */
    qcom,poll_required = <0>;   /* no polling */
    qcom,rgmii_delay = <0>;
    qcom,phy_mii_type = <1>;
    qcom,irq = <258>;
    mdiobus = <&mdio0>;

    fixed-link {
        speed = <1000>;
        full-duplex;
    };
};

&amba {
    sdcc1: sdcc@12400000 {
        status = "okay";
    };
};

&adm_dma {
    status = "okay";
};

我还看到了配置选项，这些选项允许您仅针对x86在openwrt中增加rootfs，例如 CONFIG_TARGET_KERNEL_PARTSIZE=16 要么 CONFIG_TARGET_ROOTFS_PARTSIZE=256

但是nbg6817在make menuconfig中没有像x86一样具有此选项...并且当我尝试将其添加到.config时-它不起作用。参考： https://forum.openwrt.org/t/how-to-set-root-filesystem-partition-size-on-x86-imabebuilder/4765

还有nbg6817的makefile，我认为我可以在理论上为该构建添加选项，但我还没有看到足够的文档，这给了我一个很大的希望，那就是它可以工作。如果这是全部所需，我将在此处添加什么内容：

https://github.com/openwrt/openwrt/blob/master/target/linux/ipq806x/image/Makefile#L330

define Device/zyxel_nbg6817
    DEVICE_VENDOR := ZyXEL
    DEVICE_MODEL := NBG6817
    SOC := qcom-ipq8065
    KERNEL_SIZE := 4096k
    BLOCKSIZE := 64k
    BOARD_NAME := nbg6817
    RAS_BOARD := NBG6817
    RAS_ROOTFS_SIZE := 20934k
    RAS_VERSION := "V1.99(OWRT.9999)C0"
    SUPPORTED_DEVICES += nbg6817
    DEVICE_PACKAGES := ath10k-firmware-qca9984-ct e2fsprogs kmod-fs-ext4 losetup
    $(call Device/ZyXELImage)
endef
TARGET_DEVICES += zyxel_nbg6817

我也可以想象，我可以按照设备页面的eMMC部分所述使用分区的内存位置进行挂载-我只是不知道如何在构建配置中进行编辑：
https://openwrt.org/toh/zyxel/nbg6817?s[]=zyxel&s[]=nbg6817
示例：gdisk -l /dev/mmcblk0将给出每个mmcblk0分区的存储位置（开始和结束）

任何帮助将不胜感激。坦白地说，构建配置make menuconfig中的zyxel nbg6817应该具有一个高级选项，可以使用大多数未使用的闪存进行构建。

如何在zyxel nbg6817构建中编辑openwrt系统闪存大小

iCMS 回答：如何在zyxel nbg6817构建中编辑openwrt系统闪存大小

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