更新 yocto 上的自定义设备树

Question

我在演示中使用 sama5d27-wlsom1-ek 板，并尝试对设备树进行更改。

到目前为止，我已经编译了 core-image-minimal 并发现我的 dtb 文件是在

/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/build/arch/arm/boot/dts

文件夹。

我还发现许多不同的 dts 文件

build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source/arch/arm/boot/dts

但是，如果我的机器在构建文件夹内生成设备树文件，那么它们从哪里获取？如果我使用自定义 dts 文件，如何更新它们？

我想使用我的 custom.dts 文件构建映像，在其中启用某些外围设备并禁用不需要的外围设备。（将来定制 dtb 的测试）。

我尝试了这里找到的不同方法 How to use an own device tree andmodified kernel config in Yocto? 以及 仅使用 Yocto/bitbake 快速重建设备树？

我创建了一个新meta-local层并将其添加到bblayer 后面的recipetool命令中，将我的 dts 文件添加到新层。添加KERNEL_DEVICETREE += "custom.dtb"到.bbappend元本地生成的文件中，然后运行bitbake构建映像命令到目前为止但是，当我尝试构建映像时，我似乎遇到了以下错误。

    Loading cache: 100% |############################################| Time: 0:00:00
Loaded 3474 entries from dependency cache.
Parsing recipes: 100% |##########################################| Time: 0:00:00
Parsing of 2309 .bb files complete (2307 cached, 2 parsed). 3476 targets, 358 skipped, 0 masked, 0 errors.
NOTE: Resolving any missing task queue dependencies

Build Configuration:
BB_VERSION           = "1.46.0"
BUILD_SYS            = "x86_64-linux"
NATIVELSBSTRING      = "universal"
TARGET_SYS           = "arm-poky-linux-gnueabi"
MACHINE              = "sama5d27-wlsom1-ek-sd"
DISTRO               = "poky-atmel"
DISTRO_VERSION       = "3.1.7"
TUNE_FEATURES        = "arm vfp cortexa5 neon vfpv4 thumb callconvention-hard"
TARGET_FPU           = "hard"
meta                 
meta-poky            
meta-yocto-bsp       = "dunfell:97a9f30f1c457c55bf0c791d0466ff8620110a49"
meta-oe              
meta-networking      
meta-webserver       
meta-python          
meta-initramfs       = "dunfell:2915810edbb6599051e30efb3b7f805665ddcc23"
meta-atmel           = "dunfell:d6e30f2c0e3592ed11f3a4c8380a14d0a9066ba6"
meta-multimedia      = "dunfell:2915810edbb6599051e30efb3b7f805665ddcc23"
meta-aws             = "dunfell:2e2a1c65603dc5d11349e25dc9470a65cbeb8e65"
meta-freshair        
meta-local           
workspace            = "dunfell:97a9f30f1c457c55bf0c791d0466ff8620110a49"

Initialising tasks: 100% |#######################################| Time: 0:00:04
Sstate summary: Wanted 294 Found 262 Missed 32 Current 2095 (89% match, 98% complete)
NOTE: Executing Tasks
ERROR: linux-at91-5.4+gitAUTOINC+3dba8c9991-r0 do_compile: oe_runmake failed
ERROR: linux-at91-5.4+gitAUTOINC+3dba8c9991-r0 do_compile: Execution of '/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/temp/run.do_compile.57871' failed with exit code 1:
  GEN     Makefile
  CALL    /home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source/scripts/atomic/check-atomics.sh
  CALL    /home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source/scripts/checksyscalls.sh
  CHK     include/generated/compile.h
  Kernel: arch/arm/boot/Image is ready
  Kernel: arch/arm/boot/zImage is ready
make[2]: *** No rule to make target 'arch/arm/boot/dts/new_name.dtb'.  Stop.
make[1]: *** [/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source/Makefile:1265: new_name.dtb] Error 2
make: *** [/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source/Makefile:179: sub-make] Error 2
WARNING: exit code 1 from a shell command.

ERROR: Logfile of failure stored in: /home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/temp/log.do_compile.57871
Log data follows:
| DEBUG: Executing shell function do_compile
| NOTE: KBUILD_BUILD_TIMESTAMP: Thu Jan 14 12:54:56 UTC 2021
| NOTE: make -j 12 HOSTCC=gcc  -isystem/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/include -O2 -pipe -L/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -L/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,--enable-new-dtags                         -Wl,-rpath-link,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -Wl,-rpath-link,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,-rpath,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -Wl,-rpath,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,-O1 -Wl,--allow-shlib-undefined -Wl,--dynamic-linker=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/sysroots-uninative/x86_64-linux/lib/ld-linux-x86-64.so.2 HOSTCPP=gcc  -E HOSTCXX=g++  -isystem/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/include -O2 -pipe -L/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -L/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,--enable-new-dtags                         -Wl,-rpath-link,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -Wl,-rpath-link,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,-rpath,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -Wl,-rpath,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,-O1 -Wl,--allow-shlib-undefined -Wl,--dynamic-linker=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/sysroots-uninative/x86_64-linux/lib/ld-linux-x86-64.so.2 zImage CC=arm-poky-linux-gnueabi-gcc  -mno-thumb-interwork -marm -fuse-ld=bfd -fmacro-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0=/usr/src/debug/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0                      -fdebug-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0=/usr/src/debug/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0                      -fdebug-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot=                      -fdebug-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native=  -fdebug-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source=/usr/src/kernel   LD=arm-poky-linux-gnueabi-ld.bfd
|   GEN     Makefile
|   CALL    /home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source/scripts/atomic/check-atomics.sh
|   CALL    /home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source/scripts/checksyscalls.sh
|   CHK     include/generated/compile.h
|   Kernel: arch/arm/boot/Image is ready
|   Kernel: arch/arm/boot/zImage is ready
| NOTE: make -j 12 HOSTCC=gcc  -isystem/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/include -O2 -pipe -L/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -L/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,--enable-new-dtags                         -Wl,-rpath-link,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -Wl,-rpath-link,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,-rpath,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -Wl,-rpath,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,-O1 -Wl,--allow-shlib-undefined -Wl,--dynamic-linker=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/sysroots-uninative/x86_64-linux/lib/ld-linux-x86-64.so.2 HOSTCPP=gcc  -E HOSTCXX=g++  -isystem/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/include -O2 -pipe -L/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -L/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,--enable-new-dtags                         -Wl,-rpath-link,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -Wl,-rpath-link,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,-rpath,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -Wl,-rpath,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,-O1 -Wl,--allow-shlib-undefined -Wl,--dynamic-linker=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/sysroots-uninative/x86_64-linux/lib/ld-linux-x86-64.so.2 at91-sama5d27_wlsom1_ek.dtb CC=arm-poky-linux-gnueabi-gcc  -mno-thumb-interwork -marm -fuse-ld=bfd -fmacro-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0=/usr/src/debug/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0                      -fdebug-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0=/usr/src/debug/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0                      -fdebug-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot=                      -fdebug-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native=  -fdebug-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source=/usr/src/kernel   LD=arm-poky-linux-gnueabi-ld.bfd
| NOTE: make -j 12 HOSTCC=gcc  -isystem/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/include -O2 -pipe -L/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -L/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,--enable-new-dtags                         -Wl,-rpath-link,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -Wl,-rpath-link,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,-rpath,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -Wl,-rpath,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,-O1 -Wl,--allow-shlib-undefined -Wl,--dynamic-linker=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/sysroots-uninative/x86_64-linux/lib/ld-linux-x86-64.so.2 HOSTCPP=gcc  -E HOSTCXX=g++  -isystem/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/include -O2 -pipe -L/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -L/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,--enable-new-dtags                         -Wl,-rpath-link,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -Wl,-rpath-link,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,-rpath,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/usr/lib                         -Wl,-rpath,/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native/lib                         -Wl,-O1 -Wl,--allow-shlib-undefined -Wl,--dynamic-linker=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/sysroots-uninative/x86_64-linux/lib/ld-linux-x86-64.so.2 new_name.dtb CC=arm-poky-linux-gnueabi-gcc  -mno-thumb-interwork -marm -fuse-ld=bfd -fmacro-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0=/usr/src/debug/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0                      -fdebug-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0=/usr/src/debug/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0                      -fdebug-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot=                      -fdebug-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/recipe-sysroot-native=  -fdebug-prefix-map=/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source=/usr/src/kernel   LD=arm-poky-linux-gnueabi-ld.bfd
| make[2]: *** No rule to make target 'arch/arm/boot/dts/new_name.dtb'.  Stop.
| make[1]: *** [/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source/Makefile:1265: new_name.dtb] Error 2
| make: *** [/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source/Makefile:179: sub-make] Error 2
| ERROR: oe_runmake failed
| WARNING: exit code 1 from a shell command.
| ERROR: Execution of '/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/temp/run.do_compile.57871' failed with exit code 1:
|   GEN     Makefile
|   CALL    /home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source/scripts/atomic/check-atomics.sh
|   CALL    /home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source/scripts/checksyscalls.sh
|   CHK     include/generated/compile.h
|   Kernel: arch/arm/boot/Image is ready
|   Kernel: arch/arm/boot/zImage is ready
| make[2]: *** No rule to make target 'arch/arm/boot/dts/new_name.dtb'.  Stop.
| make[1]: *** [/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source/Makefile:1265: new_name.dtb] Error 2
| make: *** [/home/fakhruddin/workspace/Freshair/my_dir/poky/build/tmp/work-shared/sama5d27-wlsom1-ek-sd/kernel-source/Makefile:179: sub-make] Error 2
| WARNING: exit code 1 from a shell command.
| 
ERROR: Task (/home/fakhruddin/workspace/Freshair/my_dir/poky/../meta-atmel/recipes-kernel/linux/linux-at91_5.4.81.bb:do_compile) failed with exit code '1'
NOTE: Tasks Summary: Attempted 6463 tasks of which 6457 didn't need to be rerun and 1 failed.

Summary: 1 task failed:
  /home/fakhruddin/workspace/Freshair/

    

Answer 1

Linux 内核设备树位于：

/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/git/arch/arm/boot/dts

请注意，源代码位于 中git，最终版本位于build.

您必须确保new_name.dtb主 Makefile 中存在：

/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/git/arch/arm/boot/dts/Makfile

+dtb-$(CONFIG_SOC_AT91SAM9) += new_name.dtb

Now the new device tree must be added to the KERNEL_DEVICETREE variable and that tells Yocto what Kernel device trees to build and ship into the boot partition so that u-boot load one of them into RAM while booting the board:

KERNEL_DEVICETREE += "new_name.dtb"

Now, after you understand how device tree are placed in the kernel, you can make this automatic, you create a bbappend recipe to your linux-at91 kernel main recipe and add your custom device tree there.

meta-local/
  recipes-kernel/
     linux/
       files/
          new_custom.dts
       linux-at91_%.bbappend

Now, you need to copy your new dts file before compiling the kernel (do_compile) , the best moment is after do_configure:

FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
SRC_URI_append = " file://new_custom.dts"
do_configure_append(){
 cp ${WORKDIR}/new_custom.dts ${S}/arch/arm/boot/dts
 echo "dtb-$(CONFIG_SOC_AT91SAM9) += new_dts.dtb" >> ${S}/arch/arm/boot/dts/Makefile
}

Now, your new device tree will be compiled, and any compilation errors may be due to syntax error.

After knowing that the device tree is compiled and added to KERNEL_DEVICETREE, this means that it is present in the boot partition along side with all other device trees also in KERNEL_DEVICETREE variable, but u-boot loads only one of them in the RAM before loading the Linux kernel, and that device tree is set in your u-boot target defconfig file present in:

/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/u-boot-.../<version>/git/configs/your_machine_defconfig

you can find your_machine_defconfig in UBOOT_CONFIG variable in your machine configuration file which is located in your board's BSP layer:

meta-<board>/conf/machine/<board>.conf

After locating the defconfig you can find a variable DEFAULT_FDT_FILE.

At first, do not change it, just build your image, and pause at uboot stage and printenv to see the fdt_file variable and set it to your new_name.dtb file and saveenv to save it for every boot.

If that is okay, you can now patch your uboot defconfig file to set the new device tree file.

Yocto tip:

${WORKDIR} in the Kernel recipe points to:

/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/

${S} point to the git directory under ${WORKDIR}

/tmp/work/sama5d27_wlsom1_ek_sd-poky-linux-gnueabi/linux-at91/5.4+gitAUTOINC+3dba8c9991-r0/git

that's why I copied the new device tree from ${WORKDIR}