uboot/u-boot-stm32mp-2020.01/doc/uImage.FIT/kernel_fdts_compressed.its

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/*
* U-Boot uImage source file with a kernel and multiple compressed FDT blobs.
* Since the FDTs are compressed, configurations must provide a compatible
* string to match directly.
*/
/dts-v1/;
/ {
description = "Image with single Linux kernel and compressed FDT blobs";
#address-cells = <1>;
images {
kernel {
description = "Vanilla Linux kernel";
data = /incbin/("./vmlinux.bin.gz");
type = "kernel";
arch = "ppc";
os = "linux";
compression = "gzip";
load = <00000000>;
entry = <00000000>;
hash-1 {
algo = "crc32";
};
hash-2 {
algo = "sha1";
};
};
fdt@1 {
description = "Flattened Device Tree blob 1";
data = /incbin/("./myboard-var1.dtb");
type = "flat_dt";
arch = "ppc";
compression = "gzip";
hash-1 {
algo = "crc32";
};
hash-2 {
algo = "sha1";
};
};
fdt@2 {
description = "Flattened Device Tree blob 2";
data = /incbin/("./myboard-var2.dtb");
type = "flat_dt";
arch = "ppc";
compression = "lzma";
hash-1 {
algo = "crc32";
};
hash-2 {
algo = "sha1";
};
};
};
configurations {
default = "conf@1";
conf@1 {
description = "Boot Linux kernel with FDT blob 1";
kernel = "kernel";
fdt = "fdt@1";
compatible = "myvendor,myboard-variant1";
};
conf@2 {
description = "Boot Linux kernel with FDT blob 2";
kernel = "kernel";
fdt = "fdt@2";
compatible = "myvendor,myboard-variant2";
};
};
};