Changes

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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>={{Message/Information Message|message=The following steps has been tested using '''Ubuntu 16.04''' and the '''4.9 version''' of the '''arm-linux-'''<span class="mw-headline">In order to compile the Linux Kernel it is necessary to prepare a suitable work environment by checking the '''gnueabihf''' compiler and its version are the corresponding. </span>}}

<span class="mw-headline">{{ Message/Information Message }}If it is necessary we can install this extra packages that could be necessaries: </span>

<span class="mw-headline">If we want sudo apt-get install libc6-armel-cross libc6-armhf-cross libc6-dev-armel-cross libncurses5-dev<br><br>sudo apt-get install lzop<br></span><span class="mw-headline">The next step is to install a particular compiler, for example clone the 4corresponding git repository.9 we can use There are different git repositories depending on the model of the processor of the board. The following commands to install ittable shows the steps for each of the <span style="color:#000000;">IGEP PROCESSOR BOARDS<code/span>:<br data-attributes="%20/code"></span>

<span {| class="mw-headlinecontenttable sortable">sudo apt-get install g++-4.9-arm-linux-gnueabihf<br data-attributesstyle="%20/width: 890px;">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! style="mw-headline">We can change between compilers using the following commandswidth:</span>  <span class=97px;"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>|PROCESSOR<span class! style="mw-headline">In addition we can install this extra packages that could be necessarieswidth: </span>  <span class=324.217px;"mw-headline">sudo apt-get install libc6-armel-cross libc6-armhf-cross libc6-dev-armel-cross libc6-dev-armhf-crossbinutils-arm-linux-gnueabihf libncurses5-dev</span> =<span id="How_to_cross_compile_the_linux_kernel" class="mw-headline">How to cross compile the linux kernel</span>=|GIT REPOSITORY<span ! style="colorwidth: #000000;">&nbsp;</span> Para dar soporte a una nueva board basada en imx en el kernel es necesario tener un fichero de configuracion defconfig (275.config) y&nbsp783px; una dtb. Por defecto empezaremos con un defconfig ya creado por igep para procesadores imx <div class="code panel pdl conf-macro output-block" data-hasbody="true" data-macro-name="code"><div class="codeContent panelContent pdl"><div id="highlighter_162759" class="syntaxhighlighter sh-confluence nogutter java">{| cellspacing="0" cellpadding="0" border="0"BRANCH

| classstyle="codewidth: 97px;"|<div class="container" titleDM3730| style="Hintwidth: double-click to select code324.217px;"><div class="line number1 index0 alt2"><code class="java plain">imx6_igep0046_defconfig</code> </div></div>|}<https:/div></div><git.isee.biz/div>Para que el linux-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 /linux-omap-2.6..)git En el caso de igep con procesadores imx <div class| style="code panel pdl conf-macro output-blockwidth: 275.783px;" data|isee-hasbody="true" datalinux-macro-name="code"><div class="codeContent panelContent pdl"><div id="highlighter_265765" class="syntaxhighlighter sh-confluence nogutter java">{| cellspacing="0" cellpadding="0" border="0"v.4.9.y

| classstyle="codewidth: 97px;"|<div class="container" titleAM335X| style="Hintwidth: double-click to select code"><div class="line number1 index0 alt2"><code class="java plain">DUAL</code>  <div class="line number2 index1 alt1"><code class="java plain">imx6dl-igep-base0040ra1324.dts</code></div><div class="line number3 index2 alt2"><code class="java plain">imx6dl-igep-base0040rc2.dts</code></div><div class="line number4 index3 alt1"><code class="java plain">imx6dl-igep-base0040rd102.dts</code></div><div class="line number5 index4 alt2">&nbsp217px;</div><div class="line number6 index5 alt1"><code class="java plain">QUAD<|https:/code></div><div class="line number7 index6 alt2"><code class="java plain">imx6q-igep-base0040ra1git.dts</code></div><div class="line number8 index7 alt1"><code class="java plain">imx6q-igep-base0040rc2isee.dts<biz/code></div><div class="line number9 index8 alt2"><code class="java plain">imx6qlinux-igep-base0040rd102.dts</code></div><div class="line number10 index9 alt1">&nbsp;</div><div class="line number11 index10 alt2"><code class="java plain">GENERICA</code><kernel/div><div class="line number12 index11 alt1"><code class="java plain">imx6qdllinux-igepomap-base0040ra2.dtsi</code></div><div class="line number13 index12 alt2"><code class="java plain">imx6qdl-igep-base0040rb6.dtsi</code></div>git<div class| style="line number14 index13 alt1"><code class="java plain">imx6qdl-igep-igep0046rawidth: 275.dtsi</code></div><div class=783px;"line number15 index14 alt2"><code class="java plain">imx6qdl|isee-igeplinux-igep0046rcv.dtsi</code></div></div></div>|}</div></div></div>Las DTS están anidadas, esto quiere decir que se cogerá la dtb generada a partir de la 4.dts dependiendo del procesador que monte igep en este caso9. 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"y

| classstyle="codewidth: 97px;"|<div classiMX6| style="containerwidth: 324.217px;" title="Hint|https: double//git.isee.biz/linux-kernel/linux-click to select code"><div classimx.git| style="line number1 index0 alt2width: 275.783px;"><code class="java plain">(dentro de dtb|isee-$(CONFIG_SOC_IMX6Q) += \)</code>imx_4.9.11_1.0.0_ga

<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="colorTo get to desired branch we will use: #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 styleid="How_to_cross_compile_the_linux_kernel" class="mw-headline">Compile the Linux Kernel<br data-attributes="color: #000000;%20/">Open a terminal</span>=* <span style="color: #000000;">Located your downloaded fileOnce the development environment has been correctly set up, the following steps can be followed in my case is inside order to compile the Linux Kernel using a Cross Compiler.<br data-attributes="%20/home/jdoe/Downloads:"></span>

<pre><span style="color: #000000;">jdoe@ubuntu ~ $ cd Downloads/</span></pre>* <span style="colorFirst of all, the default configuration ''(defconfig)'' has to be loaded. It can be done by writing the following command: #000000;">Extract binaries in root directory with root privileges</span>

<pre> <span style="color: #000000;">jdoe@ubuntu ~/Downloads $ sudo tar jxf igep-sdk<code class="java plain">make ARCH=arm CROSS_COMPILE=arm-yoctolinux-toolchaingnueabihf-*.tar.bz2 -C /[your_defconfig]</spancode></prespan>* <span style="colorIn the following table it can be found the name of each default configuration associated to each IGEP PROCESSORS BOARDS: #000000;">Make sure that binaries are installed correctly.</span>

<pre><span {| class="contenttable sortable" style="width: 888px;"|-! style="width: 160px;"|BOARD! style="width: 163px;"|DEFCONFIG! style="width: 527px;"|EXAMPLE|-| style="colorwidth: #808080160px;"><span |IGEPv5 OMAP5432| style="colorwidth: #000000163px;">jdoe@ubuntu ~|[https:/Downloads $ ls /optgit.isee.biz/pokylinux-kernel/1linux-omap-2.6/blob/isee-linux-v.2 14.29.1y/arch/arm/configs/omap2plus_defconfig omap2plus_defconfig]| style="width: 527px;"|</spanstyle="color: #000000;"><code class="java plain"> make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- omap2plus_defconfig  <br /span></precode>==</span id>|-| style="Configurewidth: 160px;" class|IGEPv2 DM3730| style="mwwidth: 163px;"|[https://git.isee.biz/linux-headlinekernel/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;">Configure<code class="java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- omap2plus_defconfig</code></span>|-| style="width: 160px;"|IGEP COM AQUILA AM335x| style="width: 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;">Open a terminal and type:<code class="java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_igep0034_defconfig</code></span>|-<pre><span | style="colorwidth: #000000160px;"> export PATH|IGEP COM MODULE DM3730/AM3703| style="width: 163px;"|[https:/opt/poky/1git.isee.2biz/sysrootslinux-kernel/i686linux-pokysdkomap-linux/usr2.6/binblob/armv7a-vfp-neon-pokyisee-linux-gnueabi:$PATH <v.4.9.y/arch/arm/span><configs/pre>omap2plus_defconfig omap2plus_defconfig]| style="width: 527px;"|<span id="Compiled_binaries" class="mw-headline" style="color: #000000;">Compiled binaries<code class="java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- omap2plus_defconfig</code></span>=<span class|-| style="mw-headlinewidth: 160px;" |IGEP SMARC AM335x| style="colorwidth: #808080163px;">Binaries|[https: latest stable //git.isee.biz/linux-kernel version IGEP OMAP3 devices is:&nbsp;'''/linux-omap-2.6/blob/isee-linux-v.4.9.37-12 (20161206)'''y/arch/arm/configs/am335x_igep0034_defconfig am335x_igep0034_defconfig]| style="width: 527px;"|</spanstyle="color: #000000;"> {| border<code class="1java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_igep0034_defconfig</code></span>

!|<span style="colorwidth: #808080160px;">'''Platform'''<|IGEP SMARC iMX6S/DL/span>Q!|<span style="colorwidth: #808080163px;">'''Kernel source'''</span>!|<span style="color[https: #808080;">'''zImage binary (igep00x0_defconfig)'''</span>/git.isee.biz/linux-kernel/linux-imx/blob/isee-imx_4.9.11_1.0.0_ga/arch/arm/configs/imx6_igep0046_defconfig imx6_igep0046_defconfig]!|<span style="colorwidth: #808080527px;">'''Modules binaries (igep00x0_defconfig)'''</span>!|<span style="color: #808080000000;">'''zImage binary (igep00x0_wilink8_defconfig)'''</span>!|<span stylecode class="color: #808080;java plain">'''Modules binaries (igep00x0_wilink8_defconfig)'''</span>!|<span stylemake ARCH=arm CROSS_COMPILE="color: #808080;">'''Compat Wireless source (only for igep00x0_wilink8_defconfig)'''arm-linux-gnueabihf- imx6_igep0046_defconfig</span>!|<span style="color: #808080;"code>'''Firmware binaries (only for igep00x0_wilink8_defconfig)'''</span>

||<span style="colorwidth: #808080160px;">IGEP00x0<|IGEP SMARC iMX6UL/span>ULL||<span style="color: #808080;">[httphttps://downloadsgit.isee.biz/pub/releases/linux_kernel/v2.6.37-12/linux-omap-2.6.37-12.tar.gz 2.6.37-12]([http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12kernel/linux-omap-2.6.37-12.tar.gz.md5 md5sum])</span>||<span style="color: #808080;">[http:imx/blob/downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/zImage-2imx_4.69.37-1211_1.bin zImage-20.6.37-12.bin]&nbsp;([http:0_ga/arch/downloads.isee.biz/pub/releasesarm/linux_kernelconfigs/v2.6.37-12/zImage-2.6.37-12.bin.md5 md5sumimx6_igep0146_defconfig imx6_igep0146_defconfig])</span>||<span style="colorwidth: #808080527px;">[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>||<span style="color: #808080000000;">[http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/zImage-2.6.37-12-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 stylecode class="color: #808080;java plain">[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 stylemake ARCH=arm CROSS_COMPILE="color: #808080;">[http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37arm-12/compat-wireless-wilink8-0.tar.gz compat-wirelesslinux-wilink8gnueabihf-0]([http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/compat-wireless-wilink8-0.tar.gz.md5 md5sum]) imx6_igep0146_defconfig</spancode>||<span style="color: #808080;">[http://downloads.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="mw-headline" style="color: #000000;">Build kernel from sources</span>=<span style="color: #000000;">'''Download'''&nbsp;Once the default configuration has been loaded, it is time to compile the latest stable version sources and follow next stepsLinux Kernel. There are three important elements to compile:</span>

<pre><span style="color* '''Image: #808080;">wget <a class="external free" href="http://downloads'''The kernel image.iseeThere are three several formats.biz/pub/releases/linux_kernel/v2.6.37-12/linux-omap-2.6.37-12.tar.gz" target="_blank" rel="nofollow noreferrer noopener">httpGenerally we will use the '''zImage'''://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/linux-omap-2.6.37-12.tar.gz</a>tar xzf linux-omap-2.6.37compressed version of the Linux kernel image that is self-12.tarextracting.gzcd linux-omap-2.6.37-12</span></pre><span style="color* '''DTBs: #000000;">Also'''Device tree binary, it could download from GIT Repositories ([http://gita low level device description, specific to your device.isee.biz/ http* '''Modules://git.isee.biz/]) and test the last unstable version at your own risk (see "''Linux mainline tree (development)''" chapter in&nbsp;[indexKernel Modules, pieces of code that can be loaded and unloaded into the kernel upon demand.php/The_Linux_kernel The Linux They extend the functionality of the kernel])</span>without the need to reboot the system. 

==<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 In order to compile this three elements we have to another configuration, clean kernel sources with commandtype: make mrproper</span>

<pre><span style="color: #000000;">Para compilar el kernel se ha de seguir los siguientes pasos:<code class="java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- zImage dtbs modules</spancode></prespan>1- Descargar la rama correspondiente con git

<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"|-* zImage: located in '''arch/arm/boot/zImage'''| class="code"|<div class="container" title="Hint* DTB: double-click to select code"><div class="line number1 index0 alt2"><code class="java plain">make ARCH=located in arch/arm CROSS_COMPILE=arm-linux-gnueabihf- imx6_igep0046_defconfi/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 /code>'''

<div {| class="code panel pdl conf-macro output-blockcontenttable sortable" data-hasbodystyle="truewidth: 890px;" data|-macro-name! style="codewidth: 281.467px;"><div class|BOARD! style="codeContent panelContent pdlwidth: 588.533px;"><div id|DTB NAME|-| style="highlighter_965738width: 281.467px;" class|IGEPv2 DM3730| style="syntaxhighlighter shwidth: 588.533px;"|[https://git.isee.biz/linux-kernel/linux-omap-2.6/blob/isee-linux-confluence nogutter javav.4.9.y/arch/arm/boot/dts/omap3-igep0020-rev-f.dts omap3-igep0020-rev-f.dts]|-| style=">width: 281.467px;"|IGEP COM MODULE DM3730/AM3703{| cellspacingstyle="0width: 588.533px;" cellpadding|[https://git.isee.biz/linux-kernel/linux-omap-2.6/blob/isee-linux-v.4.9.y/arch/arm/boot/dts/omap3-igep0030-rev-g.dts omap3-igep0030-rev-g.dts]|-| style="0width: 281.467px;" border|IGEP COM AQUILA AM335x| style="0width: 588.533px;"|[https://git.isee.biz/linux-kernel/linux-omap-2.6/blob/isee-linux-v.4.9.y/arch/arm/boot/dts/am335x-base0033.dts am335x-base0033.dts]

| classstyle="codewidth: 281.467px;"|<div classIGEPv5 OMAP5432| 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- menuconfig<2.6/blob/code> <isee-linux-v.4.9.y/div><arch/div>|}<arm/div><boot/div><dts/div>Guardar la configuracion del menuconfig en omap5-igep0050.dts omap5-igep0050.configdts] 4|- Compilar la imagen los modulos y las dtb| style="width: 281.467px;"|IGEP SMARC AM335x<div class| style="code panel pdl confwidth: 588.533px;"|[https://git.isee.biz/linux-macro outputkernel/linux-block" dataomap-2.6/blob/isee-linux-v.4.9.y/arch/arm/boot/dts/am335x-igep-hasbody="true" database0040.dts am335x-macroigep-name="code"><div class="codeContent panelContent pdl"><div id="highlighter_56426" class="syntaxhighlighter shbase0040.dts]|-confluence nogutter java">{| cellspacingstyle="0width: 281.467px;" cellpadding|IGEP SMARC iMX6 Quad| style="0" border=width: 588.533px;"|[https://git.isee.biz/linux-kernel/linux-imx/blob/isee-imx_4.9.11_1.0".0_ga/arch/arm/boot/dts/imx6q-igep-base0040rd102.dts imx6q-igep-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]]