移植小米4 NAND闪存全千兆版到openwrt

./base-files/lib/upgrade/platform.sh: mir4|\
./base-files/lib/ramips.sh: name=”mir4″
./base-files/etc/board.d/01_leds:mir4)
./base-files/etc/board.d/02_network: mir4)
./base-files/etc/board.d/02_network: mir4)
./dts/MIR4.dts: compatible = “xiaomi,mir4”, “mediatek,mt7621-soc”;
./image/mt7621.mk:define Device/mir4
./image/mt7621.mk:TARGET_DEVICES += mir4

dts文件。

/dts-v1/;

#include “mt7621.dtsi”

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

/ {
compatible = “xiaomi,mir4”, “mediatek,mt7621-soc”;
model = “Xiaomi Mi Router 4”;

aliases {
led-boot = &led_status_blue;
led-failsafe = &led_status_blue;
led-running = &led_status_blue;
led-upgrade = &led_status_blue;
};

memory@0 {
device_type = “memory”;
reg = <0x0 0x8000000>;
};

chosen {
bootargs = “console=ttyS0,115200n8”;
};

gpio-leds {
compatible = “gpio-leds”;

status_red {
label = “mir3g:red:status”;
gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
};

led_status_blue: status_blue {
label = “mir3g:blue:status”;
gpios = <&gpio0 8 GPIO_ACTIVE_LOW>;
};

status_yellow {
label = “mir3g:yellow:status”;
gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
};

wan_amber {
label = “mir3g:amber:wan”;
gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
};

lan1_amber {
label = “mir3g:amber:lan1”;
gpios = <&gpio0 14 GPIO_ACTIVE_LOW>;
};

lan2_amber {
label = “mir3g:amber:lan2”;
gpios = <&gpio0 16 GPIO_ACTIVE_LOW>;
};
};

gpio-keys-polled {
compatible = “gpio-keys-polled”;
poll-interval = <20>;

reset {
label = “reset”;
gpios = <&gpio0 18 GPIO_ACTIVE_LOW>;
linux,code = <KEY_RESTART>;
};
};
};

&nand {
status = “okay”;

partitions {
compatible = “fixed-partitions”;
#address-cells = <1>;
#size-cells = <1>;

partition@0 {
label = “Bootloader”;
reg = <0x0 0x80000>;
read-only;
};

partition@80000 {
label = “Config”;
reg = <0x80000 0x40000>;
};

partition@c0000 {
label = “Bdata”;
reg = <0xc0000 0x40000>;
read-only;
};

factory: partition@100000 {
label = “Factory”;
reg = <0x100000 0x40000>;
read-only;
};

partition@140000 {
label = “crash”;
reg = <0x140000 0x40000>;
};

partition@180000 {
label = “crash_syslog”;
reg = <0x180000 0x40000>;
};

partition@1c0000 {
label = “reserved0”;
reg = <0x1c0000 0x40000>;
read-only;
};

/* uboot expects to find kernels at 0x200000 & 0x600000
* referred to as system 1 & system 2 respectively.
* a kernel is considered suitable for handing control over
* if its linux magic number exists & uImage CRC are correct.
* If either of those conditions fail, a matching sys’n’_fail flag
* is set in uboot env & a restart performed in the hope that the
* alternate kernel is okay.
* if neither kernel checksums ok and both are marked failed, system 2
* is booted anyway.
*
* Note uboot’s tftp flash install writes the transferred
* image to both kernel partitions.
*/

partition@200000 {
label = “kernel_stock”;
reg = <0x200000 0x400000>;
};

partition@600000 {
label = “kernel”;
reg = <0x600000 0x400000>;
};

/* ubi partition is the result of squashing
* next consecutive stock partitions:
* – rootfs0 (rootfs partition for stock kernel0),
* – rootfs1 (rootfs partition for stock failsafe kernel1),
* – overlay (used as ubi overlay in stock fw)
* resulting 117,5MiB space for packages.
*/

partition@a00000 {
label = “ubi”;
reg = <0xa00000 0x7580000>;
};
};
};

&pcie {
status = “okay”;
};

&pcie0 {
wifi@0,0 {
compatible = “pci14c3,7603”;
reg = <0x0000 0 0 0 0>;
mediatek,mtd-eeprom = <&factory 0x0000>;
ieee80211-freq-limit = <2400000 2500000>;
};
};

&pcie1 {
wifi@0,0 {
compatible = “pci14c3,7662”;
reg = <0x0000 0 0 0 0>;
mediatek,mtd-eeprom = <&factory 0x8000>;
ieee80211-freq-limit = <5000000 6000000>;
};
};

&ethernet {
mtd-mac-address = <&factory 0xe000>;
mediatek,portmap = “lwlll”;
};

&pinctrl {
state_default: pinctrl0 {
gpio {
ralink,group = “jtag”, “uart2”, “uart3”, “wdt”;
ralink,function = “gpio”;
};
};
};

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