Device Tree/en: различия между версиями

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Device Tree - hardware configuration description files. They are used by Linux and hence the Wiren Board.
Device Tree are files describing the hardware configuration. They are used in Linux and therefore in the Wiren Board controllers firmware. Modification of Device Tree-files may be required when re-assigning ports, connecting some UEXT-devices, when connecting 1-Wire sensors, etc.
Modification of Device Tree files may be required when reassigning ports, connecting some UEXT devices, when connecting 1-wire sensors, etc.


Read more about Device Tree: https://en.wikipedia.org/wiki/Device_tree , http://elinux.org/Device_Tree
Read more about Device Tree: https://en.wikipedia.org/wiki/Device_tree , http://elinux.org/Device_Tree
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Device Tree files are written in .dts text format, which is compiled into dtb binary format
Device Tree files are written in .dts text format, which is compiled into dtb binary format


== Loading ==
== Loading ==
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The dtb file is located in /boot/dtbs/imx23-wirenboard28.dtb (for Wiren Board rev. 2.8), at /boot/dtbs/imx23-wirenboard32.dtb (for Wiren Board Smart Home rev. 3.5)
The dtb file is located in /boot/dtbs/imx23-wirenboard28.dtb (for Wiren Board rev. 2.8), at /boot/dtbs/imx23-wirenboard32.dtb (for Wiren Board Smart Home rev. 3.5)


== Reassembly ==


To make changes to Device Tree, you need to download Device Tree in text format, compile the imx23-wirenboard28 file.dts and record the result (imx23-wirenboard28.dtb) to /boot/dtbs/  
== Пересборка ==
 
Для внесения изменений в Device Tree надо скачать Device Tree в текстовом формате, скомпилировать файл imx23-wirenboard28.dts и записать результат (imx23-wirenboard28.dtb) в /boot/dtbs/  
 
Другой способ - [[Special:MyLanguage/Сборка ядра|Сборка ядра]]
 


Another way is to build the kernel:[[Special:MyLanguage/Сборка ядра|Сборка ядра]]
===Загрузка===


===Download===
Необходимо скачать  из [https://github.com/contactless/linux/tree/v3.13-imxv5-x0.1/arch/arm/boot/dts] файл imx23-wirenboardXX.dts, соответствующий версии устройства  и зависимости. Зависимости на настоящий момент это файлы imx23.dtsi, skeleton.dtsi.


Here[https://github.com/contactless/linux/tree/v3.13-imxv5-x0.1/arch/arm/boot/dts] you must download imx23-wirenboardXX.dts file,  corresponding the device version, and dependencies. The dependencies on this file are imx23.dtsi, skeleton.dtsi.
Основной DTS-файл:


Main DTS file:
imx23-wirenboard32.dts для Wiren Board Smart Home rev. 3.5


imx23-wirenboard32.dts for Wiren Board Smart Home rev. 3.5
imx23-wirenboard28.dts для Wiren Board rev. 2.8


imx23-wirenboard28.dts for Wiren Board rev. 2.8


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$ cd dts
$ cd dts


$ #export WB_BRANCH=v3.12-rc3-imxv5-x0.3  # for kernel 3.12
$ #export WB_BRANCH=v3.12-rc3-imxv5-x0.3  # для ядра 3.12
$ export WB_BRANCH=v3.13-imxv5-x0.1
$ export WB_BRANCH=v3.13-imxv5-x0.1


$ wget https://raw.github.com/contactless/linux/$WB_BRANCH/arch/arm/boot/dts/mxs-pinfunc.h
$ wget https://raw.github.com/contactless/linux/$WB_BRANCH/arch/arm/boot/dts/mxs-pinfunc.h
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$ wget https://raw.github.com/contactless/linux/$WB_BRANCH/arch/arm/boot/dts/imx23-wirenboard28.dts
$ wget https://raw.github.com/contactless/linux/$WB_BRANCH/arch/arm/boot/dts/imx23-wirenboard28.dts


2013-11-17 04:24:28 (37.9 MB/s) - «imx23-wirenboard28.dts» is saved [5255/5255]
2013-11-17 04:24:28 (37.9 MB/s) - «imx23-wirenboard28.dts» сохранён [5255/5255]


$ wget https://raw.github.com/contactless/linux/$WB_BRANCH/arch/arm/boot/dts/imx23.dtsi
$ wget https://raw.github.com/contactless/linux/$WB_BRANCH/arch/arm/boot/dts/imx23.dtsi


2013-11-17 04:24:33 (272 KB/s) - «imx23.dtsi» is saved [13052/13052]
2013-11-17 04:24:33 (272 KB/s) - «imx23.dtsi» сохранён [13052/13052]


$ wget https://raw.github.com/contactless/linux/$WB_BRANCH/arch/arm/boot/dts/skeleton.dtsi
$ wget https://raw.github.com/contactless/linux/$WB_BRANCH/arch/arm/boot/dts/skeleton.dtsi
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imx23.dtsi      imx23-wirenboard28.dts  skeleton.dtsi
imx23.dtsi      imx23-wirenboard28.dts  skeleton.dtsi
imx23-pinfunc.h  mxs-pinfunc.h
imx23-pinfunc.h  mxs-pinfunc.h


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===Compiler===


The Device Tree compiler in Ubuntu and Debian is in the device-tree-compiler package. Install it:
===Компилятор===
 
Компилятор Device Tree в Ubuntu и Debian находится в пакете device-tree-compiler. Установим его:


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gcc is also required
 
Также требуется gcc


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===Compilation===
 
===Компиляция===


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===Installation===


The compiled file must be written to /boot/dtsb. <b>Be sure to make a backup of the existing / boot/dtsb file!</b>
===Установка===
 
Скомпилированный файл необходимо записать в /boot/dtsb.
<b> Обязательно сделайте резервную копию существущего в /boot/dtsb файла!</b>

Версия 18:39, 24 апреля 2019

Другие языки:

Device Tree are files describing the hardware configuration. They are used in Linux and therefore in the Wiren Board controllers firmware. Modification of Device Tree-files may be required when re-assigning ports, connecting some UEXT-devices, when connecting 1-Wire sensors, etc.

Read more about Device Tree: https://en.wikipedia.org/wiki/Device_tree , http://elinux.org/Device_Tree

Device Tree for Wiren Board is located in the imx23-wirenboard28.dts 

file. It also uses the processor description file imx23.dtsi

Device Tree files are written in .dts text format, which is compiled into dtb binary format


Loading

n the standard image of the Wiren Board, the U-Boot loader reads the dtb file of the Device Tree description and passes it to the kernel. The dtb file name is specified in the/boot/uEnv.txt : 

#These are the default settings for some useful u-boot variables:
fdt_file=/boot/dtbs/imx23-wirenboard28.dtb

The dtb file is located in /boot/dtbs/imx23-wirenboard28.dtb (for Wiren Board rev. 2.8), at /boot/dtbs/imx23-wirenboard32.dtb (for Wiren Board Smart Home rev. 3.5)


Пересборка

Для внесения изменений в Device Tree надо скачать Device Tree в текстовом формате, скомпилировать файл imx23-wirenboard28.dts и записать результат (imx23-wirenboard28.dtb) в /boot/dtbs/

Другой способ - Сборка ядра


Загрузка

Необходимо скачать из [1] файл imx23-wirenboardXX.dts, соответствующий версии устройства и зависимости. Зависимости на настоящий момент это файлы imx23.dtsi, skeleton.dtsi.

Основной DTS-файл:

imx23-wirenboard32.dts для Wiren Board Smart Home rev. 3.5

imx23-wirenboard28.dts для Wiren Board rev. 2.8 


$ mkdir dts
$ cd dts

$ #export WB_BRANCH=v3.12-rc3-imxv5-x0.3  # для ядра 3.12
$ export WB_BRANCH=v3.13-imxv5-x0.1


$ wget https://raw.github.com/contactless/linux/$WB_BRANCH/arch/arm/boot/dts/mxs-pinfunc.h

$ wget https://raw.github.com/contactless/linux/$WB_BRANCH/arch/arm/boot/dts/imx23-wirenboard28.dts

2013-11-17 04:24:28 (37.9 MB/s) - «imx23-wirenboard28.dts» сохранён [5255/5255]

$ wget https://raw.github.com/contactless/linux/$WB_BRANCH/arch/arm/boot/dts/imx23.dtsi

2013-11-17 04:24:33 (272 KB/s) - «imx23.dtsi» сохранён [13052/13052]

$ wget https://raw.github.com/contactless/linux/$WB_BRANCH/arch/arm/boot/dts/skeleton.dtsi

$ wget https://raw.github.com/contactless/linux/$WB_BRANCH/arch/arm/boot/dts/imx23-pinfunc.h

$ ls 
imx23.dtsi       imx23-wirenboard28.dts  skeleton.dtsi
imx23-pinfunc.h  mxs-pinfunc.h


Компилятор

Компилятор Device Tree в Ubuntu и Debian находится в пакете device-tree-compiler. Установим его: 

$ sudo apt-get install device-tree-compiler


Также требуется gcc 

$ sudo apt-get install gcc


Компиляция

$ gcc -E -Wp,-MD,imx23-wirenboard28.dtb.d.pre.tmp -nostdinc -I. -undef -D__DTS__ -x assembler-with-cpp -o .imx23-wirenboard28.dtb.dts.tmp  imx23-wirenboard28.dts

$ cat .imx23-wirenboard28.dtb.dts.tmp | grep -v "^#" | dtc -I dts -O dtb -o imx23-wirenboard28.dtb
DTC: dts->dtb  on file "-"


Установка

Скомпилированный файл необходимо записать в /boot/dtsb. Обязательно сделайте резервную копию существущего в /boot/dtsb файла!

Источник — https://wirenboard.com/wiki/index.php?title=Device_Tree/en&oldid=18769