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Linux is a clone the result of merging the computational Kernel made by Linux Torval and the operating scheme present in any Unix operative system Unix, Kernel was written from scratch by Linus Torvalds with assistance from and a loosely-knit team of hackers across the Net. It aims towards POSIX standard and Single UNIX Specification compliance.

To [index[Ubuntu 16.php/04 LTS Toolchain|Ubuntu_16.04_LTS_Toolchain setup the cross-compiling04]] there are two fundamental variables that the kernel uses to select the target architecture. Normally these values are guessed based on your build environment, but of course that environment here does not match our target embedded system, so we'll need to override them. The variables in question are:

=<span id="How_to_cross_compile_the_linux_kernel" class="mw-headline">Prepare the environment<br data-attributes="%20/"></span>=<span class="mw-headline">{{Message/Information Message|message=The following steps has been followed tested using an '''Ubuntu 16.04 ''' and the '''4.9.3 cross compiler version (Ubuntu/Linaro 4.9.3''' of the '''arm-linux-'''<span class="mw-13ubuntu2)}}headline">'''gnueabihf''' compiler</span>}}

<span class="mw-headline">In order First we have to compile set up the Linux Kernel Cross Compiler correctly if it is necessary to prepare a suitable work environment by checking . In this [[Set Up the compiler and its version Cross Compiler|post]] there are the correspondingsome steps that can be followed in order to do it. </span>

<span class="mw-headline">If we want to install a particular compiler, for example the 4.9 it is necessary we can use the following commands to install itthis extra packages that could be necessaries:<code></code></span>

<span class="mw-headline">sudo apt-get install g++-4.9-arm-linux-gnueabihf<br data-attributes="%20/">sudo apt-get install cpp-4.9-arm-linux-gnueabihf<br data-attributes="%20/">sudo apt-get install gcc-4.9-arm-linux-gnueabihf<br data-attributes="%20/">sudo apt-get install gcc-4.9-arm-linux-gnueabihf-base<code></code></span><span class="mw-headline">We can change between compilers using the following commands:</span>  <span class="mw-headline">sudo update-alternatives --set arm-linux-gnueabihf-g++ "/usr/bin/arm-linux-gnueabihf-g++-4.9"<br data-attributes="%20/">sudo update-alternatives --set arm-linux-gnueabihf-cpp "/usr/bin/arm-linux-gnueabihf-cpp-4.9"<br data-attributes="%20/">sudo update-alternatives --set arm-linux-gnueabihf-gcc-ar "/usr/bin/arm-linux-gnueabihf-gcc-ar-4.9"<br data-attributes="%20/">sudo update-alternatives --set arm-linux-gnueabihf-gcc-nm "/usr/bin/arm-linux-gnueabihf-gcc-nm-4.9"<br data-attributes="%20/">sudo update-alternatives --set arm-linux-gnueabihf-gcc-ranlib "/usr/bin/arm-linux-gnueabihf-gcc-ranlib-4.9"<br data-attributes="%20/">sudo update-alternatives --set arm-linux-gnueabihf-gcov "/usr/bin/arm-linux-gnueabihf-gcov-4.9"</span><span class="mw-headline">In addition we can install this extra packages that could be necessaries: </span>  <span class="mw-headline">sudo apt-get install libc6-armel-cross libc6-armhf-cross libc6-dev-armel-cross libc6libncurses5-dev<br><br>sudo apt-armhf-crossbinutils-arm-linux-gnueabihf libncurses5-devget install lzop<br></span><span class="mw-headline">The next step is to clone the corresponding git repository. There are different git repositories depending on the model of the processor of the board. The following table shows the steps for each of the <span style="color: #000000;">IGEP PROCESSOR BOARDS</span>:<br data-attributes="%20/"></span>

| style="width: 324.217px;"|git@https://git.isee.biz:/linux-kernel/linux-omap-2.6.git

| style="width: 324.217px;"|git@https://git.isee.biz:/linux-kernel/linux-omap-2.6.git

| style="width: 324.217px;"|git@https://git.isee.biz:/linux-kernel/linux-imx.git

=<span id="How_to_cross_compile_the_linux_kernel" class="mw-headline">Compile the Linux Kernel<br /></span>=<span style="colorTo get to desired branch we will use: #000000;"> Once the development enviroment has been correctly set up, the following steps can be followed in order to compile the Linux Kernel using a Cross Compiler.<br /></span>

Para dar soporte a una nueva board basada en imx en el kernel es necesario tener un fichero de configuracion <span style="color: #000000;">First of all, the default configuration ''(defconfig (.config) y&nbsp; una dtb'' has to be loaded.It can be done by writing the following command:</span>

{| class="contenttable sortable" style="width: 888px;"|-! style="width: 160px;"|BOARD! style="width: 163px;"|DEFCONFIG! style="width: 527px;"|EXAMPLE|-| style="width: 160px;"|IGEPv5 OMAP5432| style="width: 163px;"|[https://git.isee.biz/linux-kernel/linux-omap-2.6/blob/isee-linux-v.4.9.y/arch/arm/configs/omap2plus_defconfig omap2plus_defconfig]| style="width: 527px;"|<span style="color: #000000;"><div code class="java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- omap2plus_defconfig  <br /></code panel pdl conf></span>|-macro output-block| style="width: 160px;" data-hasbody|IGEPv2 DM3730| style="truewidth: 163px;" data|[https://git.isee.biz/linux-kernel/linux-omap-macro2.6/blob/isee-namelinux-v.4.9.y/arch/arm/configs/omap2plus_defconfig omap2plus_defconfig]| style="codewidth: 527px;"|<span style="color: #000000;"><div code class="codeContent panelContent pdljava plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- omap2plus_defconfig</code><div id/span>|-| style="width: 160px;"|IGEP COM AQUILA AM335x| style="highlighter_162759width: 163px;" |[https://git.isee.biz/linux-kernel/linux-omap-2.6/blob/isee-linux-v.4.9.y/arch/arm/configs/am335x_igep0034_defconfig am335x_igep0034_defconfig]| style="width: 527px;"|<span style="color: #000000;"><code class="syntaxhighlighter sh-confluence nogutter javaplain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_igep0034_defconfig</code></span>|-| style="width: 160px;"|IGEP COM MODULE DM3730/AM3703| style="width: 163px;"|[https://git.isee.biz/linux-kernel/linux-omap-2.6/blob/isee-linux-v.4.9.y/arch/arm/configs/omap2plus_defconfig omap2plus_defconfig]{| cellspacingstyle="0width: 527px;" cellpadding|<span style="0color: #000000;" border><code class="0java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- omap2plus_defconfig</code></span>

| classstyle="codewidth: 160px;"|<div classIGEP SMARC AM335x| style="containerwidth: 163px;" title="Hint|[https: double-click to select code"><div class="line number1 index0 alt2"><code class="java plain">imx6_igep0046_defconfig</code> </div><git.isee.biz/div>|}<linux-kernel/div><linux-omap-2.6/div><blob/div>Para que el kernel compile la dtb es necesario tener una dts con la configuración de los periféricos y los drivers que los gestionan,ademas de una anidación al dtsi del procesador correspondiente ( en este caso imx6 ya sea quad, dual, solo isee-linux-v.4.9.)y/arch/arm/configs/am335x_igep0034_defconfig am335x_igep0034_defconfig] En el caso de igep con procesadores imx <div class| style="code panel pdl conf-macro output-blockwidth: 527px;" data-hasbody|<span style="true" data-macro-name="codecolor: #000000;"><div code class="codeContent panelContent pdljava plain"><div idmake ARCH="highlighter_265765" classarm CROSS_COMPILE="syntaxhighlighter sharm-linux-gnueabihf-confluence nogutter java" am335x_igep0034_defconfig</code></span>{| cellspacing="0" cellpadding="0" border="0"

| classstyle="codewidth: 160px;"|<div class="container" title="Hint: double-click to select code"><div class="line number1 index0 alt2"><code class="java plain">DUAL<IGEP SMARC iMX6S/DL/code>Q  <div class| style="line number2 index1 alt1width: 163px;"><code class="java plain">imx6dl-igep-base0040ra1.dts<|[https:/code></div><div class="line number3 index2 alt2"><code class="java plain">imx6dl-igep-base0040rc2git.isee.dts<biz/code><linux-kernel/div><div class="line number4 index3 alt1"><code class="java plain">imx6dllinux-igep-base0040rd102.dts<imx/code><blob/div><div class="line number5 index4 alt2">&nbsp;</div><div class="line number6 index5 alt1"><code class="java plain">QUAD</code></div><div class="line number7 index6 alt2"><code class="java plain">imx6qisee-igep-base0040ra1imx_4.9.11_1.dts</code></div><div class="line number8 index7 alt1"><code class="java plain">imx6q-igep-base0040rc20.dts<0_ga/code><arch/div><div class="line number9 index8 alt2"><code class="java plain">imx6q-igep-base0040rd102.dts<arm/code><configs/div>imx6_igep0046_defconfig imx6_igep0046_defconfig]<div class| style="line number10 index9 alt1">&nbspwidth: 527px;</div><div class="line number11 index10 alt2">|<code classspan style="java plain">GENERICA</code></div><div class="line number12 index11 alt1color: #000000;"><code class="java plain">imx6qdl-igep-base0040ra.dtsi</code></div><div classmake ARCH="line number13 index12 alt2"><code classarm CROSS_COMPILE="java plain">imx6qdl-igep-base0040rb.dtsi</code></div><div class="line number14 index13 alt1"><code class="java plain">imx6qdlarm-igep-igep0046ra.dtsi</code></div><div class="line number15 index14 alt2"><code class="java plain">imx6qdllinux-igepgnueabihf-igep0046rc.dtsi imx6_igep0046_defconfig</code></divspan></div></div>|}</div></div></div>Las DTS están anidadas, esto quiere decir que se cogerá la dtb generada a partir de la .dts dependiendo del procesador que monte igep en este caso. Para que el kernel compile las .dts en dtb se ha de añadir en el Makefile de arch/arm/boot/dts/ <div class="code panel pdl conf-macro output-block" data-hasbody="true" data-macro-name="code"><div class="codeContent panelContent pdl"><div id="highlighter_599857" class="syntaxhighlighter sh-confluence nogutter java">{| cellspacing="0" cellpadding="0" border="0"

| classstyle="codewidth: 160px;"|<div classIGEP SMARC iMX6UL/ULL||[https://git.isee.biz/linux-kernel/linux-imx/blob/isee-imx_4.9.11_1.0.0_ga/arch/arm/configs/imx6_igep0146_defconfig imx6_igep0146_defconfig]| style="container" title="Hintwidth: double-click to select code527px;">|<div classspan style="line number1 index0 alt2color: #000000;"><code class="java plain">(dentro de dtbmake ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-$(CONFIG_SOC_IMX6Q) += \) imx6_igep0146_defconfig</code></span>|}Once the default configuration has been loaded, it is time to compile the Linux Kernel. There are three important elements to compile:

<div class="line number2 index1 alt1"><code class="java spaces">&nbsp;&nbsp;&nbsp;</code><code class="java plain">imx6dl-igep-base0040rc2.dtb \</code></div><div class="line number3 index2 alt2"><code class="java spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="java plain">imx6dl-igep-base0040rd102.dtb \</code></div><div class="line number4 index3 alt1"><code class="java spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="java plain">imx6q-igep-base0040rc2.dtb \</code></div><div class="line number5 index4 alt2"><code class="java spaces">&nbsp;&nbsp;&nbsp;&nbsp;</code><code class="java plain">imx6q-igep-base0040rd102.dtb \</code></div></div></div>|}</div></div></div>=<span id="Setup_IGEP_SDK_Yocto_Toolchain_1.2.2-3" class="mw-headline">Setup IGEP SDK</span><span id="Setup_IGEP_SDK_Yocto_Toolchain_1.2.2-3" class="mw-headline" style="colorIn order to compile this three elements we have to type: #808080;"> Yocto Toolchain 1.2.2-3</span>===<span id="Install" class="mw-headline">Install</span>==<span style="color: #000000;">Download -&nbsp;[http://www.isee.biz/support/downloads/item/igep-sdk-yocto-toolchain-1-2-2-3 isee.biz]</span>

<span style="color: #000000;">follow the next steps:<code class="java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- zImage dtbs modules</code></span>

* <span style="color: #000000;">Open a terminal</span>* <span style="color: #000000;">Located your downloaded file, Finally we will find the resulting compiled Kernel in my case is inside the '''''arch/homearm/jdoe/Downloadsboot''''' folder:</span>

<pre><span style="color* zImage: #000000;">jdoe@ubuntu ~ $ cd Downloadslocated in '''arch/<arm/span><boot/pre>zImage'''* <span style="colorDTB: #000000;">Extract binaries located in root directory with root privilegesarch/arm/boot/dts/.dtb. Depending of the board the dtb file will be different. In the following table it is detailed the corresponding dtb filename for each b''' <br /span>'''

<pre><span style{| class="color: #808080;contenttable sortable"><span style="colorwidth: #000000890px;">jdoe@ubuntu ~/Downloads $ ls /opt/poky/1.2 1.2.1</span> </span></pre>|-==<span id! style="Configure" class="mw-headlinewidth: 281.467px;" |BOARD! style="colorwidth: #000000588.533px;">Configure</span>==|DTB NAME|-<span | style="colorwidth: #000000281.467px;">Open a terminal and type:</span>|IGEPv2 DM3730 <pre><span | style="colorwidth: #000000588.533px;"> export PATH=|[https:/opt/pokygit.isee.biz/1linux-kernel/linux-omap-2.26/sysrootsblob/i686isee-pokysdklinux-linuxv.4.9.y/arch/arm/usrboot/bindts/armv7aomap3-igep0020-vfprev-neonf.dts omap3-pokyigep0020-linuxrev-gnueabi:$PATH </span></pre>f.dts]=<span id="Compiled_binaries" class="mw|-headline" | style="colorwidth: #000000281.467px;">Compiled binaries<|IGEP COM MODULE DM3730/span>=AM3703<span class="mw-headline" | style="colorwidth: #808080588.533px;">Binaries|[https: latest stable //git.isee.biz/linux-kernel version IGEP OMAP3 devices is:&nbsp;'''/linux-omap-2.6/blob/isee-linux-v.374.9.y/arch/arm/boot/dts/omap3-12 (20161206)'''</span> {| border="1"igep0030-rev-g.dts omap3-igep0030-rev-g.dts]

!|<span style="colorwidth: #808080281.467px;">'''Platform'''</span>|IGEP COM AQUILA AM335x!|<span style="colorwidth: #808080588.533px;">'''Kernel source'''</span>!|<span style="color[https: #808080;">'''zImage binary (igep00x0_defconfig)'''</span>!|<span style="color: #808080;">'''Modules binaries (igep00x0_defconfig)'''</span>!|<span style="color: #808080;">'''zImage binary (igep00x0_wilink8_defconfig)'''<git.isee.biz/linux-kernel/linux-omap-2.6/blob/isee-linux-v.4.9.y/arch/span>!|<span style="color: #808080;">'''Modules binaries (igep00x0_wilink8_defconfig)'''<arm/span>!|<span style="color: #808080;">'''Compat Wireless source (only for igep00x0_wilink8_defconfig)'''<boot/span>!|<span style="color: #808080;">'''Firmware binaries (only for igep00x0_wilink8_defconfig)'''<dts/span>am335x-base0033.dts am335x-base0033.dts]

||<span style="color: #808080;">IGEP00x0</span>||<span style="color: #808080;">[httpwidth://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/linux-omap-2.6281.37-12.tar.gz 2.6.37-12]([http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/linux-omap-2.6.37-12.tar.gz.md5 md5sum])</span>||<span style="color: #808080467px;">[http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/zImage-2.6.37-12.bin zImage-2.6.37-12.bin]&nbsp;([http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/zImage-2.6.37-12.bin.md5 md5sum])</span>||<span style="color: #808080;">[http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/modules-2.6.37-12.tar.gz modules-2.6.37-12]([http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/modules-2.6.37-12.tar.gz.md5 md5sum)]</span>IGEPv5 OMAP5432||<span style="colorwidth: #808080;">[http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/zImage-2588.6.37-12-wilink8.bin zImage-2.6.37-12-wilink8.bin]([http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/zImage-2.6.37-12-wilink8.bin.md5 md5sum])</span>||<span style="color: #808080;">[http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/modules-2.6.37-12-wilink8.tar.gz modules-2.6.37-12-wilink8]([http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/modules-2.6.37-12-wilink8.tar.gz.md5 md5sum)]</span>||<span style="color: #808080533px;">[http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/compat-wireless-wilink8-0.tar.gz compat-wireless-wilink8-0]([http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/compat-wireless-wilink8-0.tar.gz.md5 md5sum])</span>||<span style="color: #808080;">[httphttps://downloadsgit.isee.biz/pub/releases/linux_kernel/v2.6.37-12/ti-connectivity-wilink8-0.tar.gz ti-connectivity-wilink8-0]([http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/ti-connectivity-wilink8-0.tar.gz.md5 md5sum)]</span>|}=<span id="Build_kernel_from_sources" class="mwlinux-headline" style="color: #000000;">Build kernel from sources</span>=<span style="color: #000000;">'''Download'''&nbsp;the latest stable version sources and follow next steps:</span> <pre><span style="color: #808080;">wget <a class="external free" href="http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/linux-omap-2.6.37-12.tar.gz" target="_blank" rel="nofollow noreferrer noopener">http:/blob/downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/linux-omap-2v.6.37-124.tar9.gz<y/a>tar xzf linux-omap-2.6.37-12.tar.gzcd linux-omap-2.6.37-12<arch/span><arm/pre><span style="color: #000000;">Also, it could download from GIT Repositories ([http:boot/dts/gitomap5-igep0050.iseedts omap5-igep0050.biz/ http://git.isee.biz/dts]) and test the last unstable version at your own risk (see "''Linux mainline tree (development)''" chapter in&nbsp;[index.php/The_Linux_kernel The Linux kernel])</span> ==<span id="Important_procedures" class="mw-headline" style="color: #000000;">Important procedures</span>==* <span style="color: #808080;">Remove rootfs modules binaries from any previous Kernel</span>* <span style="color: #808080;">If you switch to another configuration, clean kernel sources with command: make mrproper</span> <pre><span style="color: #000000;">Para compilar el kernel se ha de seguir los siguientes pasos:</span></pre>1- Descargar la rama correspondiente con git 2- Configurar el kernel con la minima configuracion que nos ofrece <div class="code panel pdl conf-macro output-block" data-hasbody="true" data-macro-name="code"><div class="codeContent panelContent pdl"><div id="highlighter_902183" class="syntaxhighlighter sh-confluence nogutter java">{| cellspacing="0" cellpadding="0" border="0"

| classstyle="codewidth: 281.467px;"|<div classIGEP SMARC AM335x| style="containerwidth: 588.533px;" title="Hint|[https: double-click to select code"><div class="line number1 index0 alt2"><code class="java plain">make ARCH=arm CROSS_COMPILE=arm//git.isee.biz/linux-kernel/linux-gnueabihfomap- imx6_igep0046_defconfi<2.6/code> <blob/isee-linux-v.4.9.y/div><arch/div>|}<arm/div><boot/div><dts/div>3am335x-igep- Ejecutar el menuconfig para optimizar la configuracion a traves del menúbase0040. <div class="code panel pdl confdts am335x-macro outputigep-block" data-hasbody="true" data-macro-name="code"><div class="codeContent panelContent pdl"><div id="highlighter_965738" class="syntaxhighlighter sh-confluence nogutter java">{| cellspacing="0" cellpadding="0" border="0"base0040.dts]

| classstyle="codewidth: 281.467px;"|<div classIGEP SMARC iMX6 Quad| style="containerwidth: 588.533px;" title="Hint|[https: double-click to select code"><div class="line number1 index0 alt2"><code class="java plain">make ARCH=arm CROSS_COMPILE=arm//git.isee.biz/linux-kernel/linux-gnueabihfimx/blob/isee- menuconfig<imx_4.9.11_1.0.0_ga/code> <arch/div><arm/div>|}<boot/div><dts/div></div>Guardar la configuracion del menuconfig en .config 4imx6q- Compilar la imagen los modulos y las dtb <div class="code panel pdl configep-macro outputbase0040rd102.dts imx6q-block" dataigep-hasbody="true" data-macro-name="code"><div class="codeContent panelContent pdl"><div id="highlighter_56426" class="syntaxhighlighter sh-confluence nogutter java">{| cellspacing="0" cellpadding="0" border="0"base0040rd102.dts]

| classstyle="codewidth: 281.467px;"|<div classIGEP SMARC iMX6 Dual Lite| style="containerwidth: 588.533px;" title="Hint|[https: double-click to select code"><div class="line number1 index0 alt2"><code class="java plain">make ARCH=arm CROSS_COMPILE=arm//git.isee.biz/linux-kernel/linux-gnueabihfimx/blob/isee- zImage modules dtbs<imx_4.9.11_1.0.0_ga/code> <arch/div><arm/div>|}<boot/div><dts/div></div>5imx6dl- Instalar en el rootfs los modulos del kernel que son cargables ( es decir que no estan builtigep-in) <div class="code panel pdl conf-macro output-block" database0040rd102.dts imx6dl-hasbody="true" data-macro-name="code"><div class="codeContent panelContent pdl"><div id="highlighter_785157" class="syntaxhighlighter shigep-confluence nogutter java">{| cellspacing="0" cellpadding="0" border="0"base0040rd102.dts]

| classstyle="codewidth: 281.467px;"|<div class="container" title="Hint: double-click to select code"><div class="line number1 index0 alt2"><code class="java plain">sudo make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- modules_install INSTALL_MOD_PATH=/opt/nfs-server/rootfs/ubuntu-xenial-armhf-base</code> </div></div>IGEP SMARC iMX6 Ultra Lite|}</div></div></div>'''Nota|[https: Es muy importante que el INSTALL_MOD_PATH sea el correcto y de lugar justo al contenido que se esperaría en un sistema linux (usr, bin, etc, home, opt), este comando ademas se ha de ejecutar con sudo.''' '''Si éste comando falla, es muy probable que instale los modulos en el Host PC pudiendo dejar inservible el actual SO.''' ==<span id="Scenarios" class="mw-headline" style="color: #000000;">Scenarios</span>==<span style="color: #000000;">Consider the following situations:</span> <span style="color: #000000;">'''Scenario Agit.'''&nbsp;You have and IGEP0020 board plus IGEP0022 expansion board, then you should add in your&nbsp;[indexisee.phpbiz/How_do_I_edit_my_kernel_command_line linux-kernel command line]</span> <pre><span style="color: #000000;">buddy=igep0022<linux-imx/span><blob/pre><span style="color: #000000;">Optionally, to enable the IGEP0022 modem which is disabled by default you should add in your&nbsp;[indexisee-imx_4.php/How_do_I_edit_my_kernel_command_line kernel command line]</span> <pre><span style="color: #000000;">buddy=igep0022 buddy9.modem=yes</span></pre><span style="color: #000000;">NOTE: UART2 can be used for bluetooth OR modem in expansion board but NOT at same time11_1. They are INCOMPATIBLE0.<0_ga/span> <span style="color: #000000;">'''Scenario B.'''&nbsp;You have and IGEP0030 board plus BASE0010 expansion board, then you should add in your&nbsp;[index.phparch/How_do_I_edit_my_kernel_command_line kernel command line]<arm/span> <pre><span style="color: #000000;">buddy=base0010<boot/span><dts/pre><span style="color: #000000;">'''Scenario Cimx6ul-igep-base0040rd102.'''&nbsp;You have and IGEP0030 board plus BASE0010 Rev. B expansion board, then you should add in your&nbsp;[indexdts imx6ul-igep-base0040rd102.php/How_do_I_edit_my_kernel_command_line kernel command linedts]</span> <pre><span style="color: #000000;">buddy=base0010 buddy.revision=B</span></pre><span style="color: #000000;">'''Scenario D.'''&nbsp;You have and IGEP0032 board plus BASE0010 Rev. B expansion board, then you should add in your&nbsp;[index.php/How_do_I_edit_my_kernel_command_line kernel command line]</span> <pre><span style="colorhttps: #000000;">buddy=base0010 buddy.revision=B</span></pre><span style="color: #000000;">'''Scenario Egit.'''&nbsp;You have and IGEP0030 board plus ILMS0015 expansion board, then you should add in your&nbsp;[indexisee.phpbiz/How_do_I_edit_my_kernel_command_line linux-kernel command line]</span> <pre><span style="color: #000000;">buddy=ilms0015</span></pre>=<span id="Layout" class="mwlinux-headline" style="color: #000000;">Layout<imx/span>=<span style="color: #808080;">Machine specific files are located in&nbsp;'''arch/armblob/machisee-omap2/'''&nbsp;directory with name&nbsp;'''board-igep*imx_4.c'''&nbsp;:</span> * <span style="color: #808080;">'''board-igep00209.c''': For IGEP0020 machine</span>* <span style="color: #808080;">'''board-igep003011_1.c''': For IGEP0030 machine</span>* <span style="color: #808080;">'''board-igep00320.c''': For IGEP0032 machine<0_ga/span> <span style="color: #808080;">Expansion board files, also are located in&nbsp;'''arch/arm/mach-omap2boot/'''&nbsp;directory with name&nbsp;'''exp-*.c'''&nbsp;:<dts/span> * <span style="color: #808080;">'''expimx6ul-igep0022.c''': For IGEP0022 expansion board</span>* <span style="color: #808080;">'''expigep-base0010.c''': For BASE0010 expansion board</span>* <span style="color: #808080;">'''expbase0040rd102-ilms0015wifi.c''': For ILMS0015 expansion board</span> =<span id="Adding_New_Expansion_Boards" class="mwdts imx6ul-headline" style="color: #000000;">Adding New Expansion Boards</span>=<span style="color: #808080;">This chapter is meant to be a starting point for people to learn how to add your own expansion board in three steps.</span> ==<span id="Step_1:_Add_new_expansion_board_file" class="mwigep-headline" style="color: #808080;">Step 1: Add new expansion board file</span>==<span style="color: #808080;">As you can see in Layout chapter, an expansion board is called expbase0040rd102-wifi.c and should be located in arch/arm/mach-omap2 directory, so the first step will be add a new file for your new expansion board. Following example creates a new expansion board file called exp-dummy.c (arch/arm/mach-omap2/exp-dummy.c)</span>dts]|}

<pre><span style="color: #808080;"> #include &lt;linuxOnce you have to compile the Kernel, you have to copy de Zimage and dtb in /media/user/kernelboot.h&gt; #include &lt;linux'''<br /init.h&gt;>'''

void __init dummy_init(void) { pr_info("Initializing expansion board ... \n"); }</span></pre><span style="colorzImage example: #808080;">next, add the new file to be built</span>

<pre><span style="color: #808080000000;">diff --git a/<code class="java plain">cp arch/arm/mach-omap2boot/Makefile bzimage /archmedia/armuser/mach-omap2/Makefileindex 7505be9..a6572f2 100644--- a/arch/arm/mach-omap2/Makefile+++ b/arch/arm/mach-omap2/Makefile@@ -156,6 +156,7 @@ obj-$(CONFIG_MACH_IGEP0020) += board-igep0020.o \ obj-$(CONFIG_MACH_IGEP0030) += board-igep0030.o \ board-igep00x0.o \ exp-base0010.o \+ exp-dummy.o \ hsmmc.o obj-$(CONFIG_MACH_OMAP3_TOUCHBOOK) += board-omap3touchbook.o \ hsmmc.o</span></pre>==<span id="Step_2:_Register_new_expansion_board" class="mw-headline" style="color: #808080;">Step 2: Register new expansion boardboot</span>==<span style="color: #808080;"code>Now, edit board-igep00x0.h and add an identifier for the new expansion board, for example,</span>

#define IGEP00X0_BUDDY_HWREV_A (1 &lt;&lt; 0) #define IGEP00X0_BUDDY_HWREV_B (1 &lt;&lt; 1)</span></pre><span style="color: #808080000000;">also, edit in board<code class="java plain">cp arch/arm/boot/dts/omap3-igep00x0igep0020-rev-f.c the buddy_early_param to add the new expansion board,dtb /media/user/boot</code></span>

<pre><span style="color: #808080;">diff --git '''Before to install the modules, you need to choose a/arch/arm/mach[[IGEP Firmware set-omap2/board-igep0030.c b/arch/armup|rootfs]] and copy in your SDCard or Nand/mach-omap2/board-igep0030MMC rootfs parition.cindex 2b97257..44b319d 100644--- a/arch/arm/mach-omap2/board-igep0030.c+++ b/arch/arm/mach-omap2/board-igep0030.c@@ -204,6 +204,8 @@ static struct omap_board_mux board_mux[] __initdata = {'''

static void __init igep0030_init(void) {@@ -223'''Finally''',6 +225the last step is to''' install the modules inside the desired rootfs'''. For example,10 @@ static void __init igep0030_init(void) /* - BASE0010 (adds twl4030_pdata) */ if (igep00x0_buddy_pdata.model == IGEP00X0_BUDDY_BASE0010) base0010_init(&amp;twl4030_pdata);+ the rootfs is located in a external storage device mounted on the /* - DUMMY */+ if (igep00x0_buddy_pdata.model == IGEP00X0_BUDDY_DUMMY)+ dummy_init();+media folder:

sudo make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- INSTALL_MOD_PATH=/* Add twl4030 common data *media/ omap3_pmic_get_config(&amp;twl4030_pdata, TWL_COMMON_PDATA_USB |<user/span><rootfs/pre>modules_install==<span id="Known_issuesLinux_kernels" class="mw-headline" style="color: #808080;">Known issuesLinux kernels</span>==<span style="color: #808080;">See&nbsp;[http://processors.wiki.ti.com/index.php/AM35x-OMAP35x-PSP_04.02.00.07_Release_Notes#Known_Issues_-_AM.2FDM37x http://processors.wiki.ti.com/index.php/AM35x-OMAP35x-PSP_04.02.00.07_Release_Notes#Known_Issues_-_AM.2FDM37x]</span>To get more information about our Kernel and their compatibilities

==<span id="modules_are_not_installed_correctly" class="mw-headline" style="color: #808080;">modules are not installed correctly</span>==* [[Linux Kernel 4.1.y|Linux Kernel 4.1]]<span style="color: #808080;">Try to change rootfs owner from root to your username* [[Linux Kernel 3.8.y|Linux Kernel 3.</span>8]]

<pre><span style="color[[Category: #808080;">depmod -aLinux]]depmod -A </span></pre><span style="color[[Category: #808080;">Finally reboot the system</span>Linux_Kernel]]