Changes

[[File:245px-Tux.svg.png|right|331x391px167x197px]] 

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:

(The following steps has been tested using '''Ubuntu 16First we have to set up the Cross Compiler correctly if it is necessary.04''' and In this [[Set Up the '''4Cross Compiler|post]] there are some steps that can be followed in order to do it.9 version''' of the '''arm-linux-'''<span class="mw-headline">'''gnueabihf''' compiler</span>)

<span class="mw-headline">In order to compile the Linux Kernel If it is necessary to prepare a suitable work environment by checking the compiler and its version are the corresponding. we can install this extra packages that could be necessaries: </span>

<span class="mw-headline">If we want to install a particular compiler, for example the 4.9 we can use the following commands to install it:<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>

| 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

{| class="contenttable sortable" style="width: 890px888px;"|-! style="width: 160px;"|BOARD! style="width: 163px;"|DEFCONFIG! style="width: 527px;"|EXAMPLE

! | style="width: 160.1px160px;"|BOARDIGEPv5 OMAP5432! | style="width: 124.9px163px;"|DEFCONFIG[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: 566px527px;"|EXAMPLE<span style="color: #000000;"><code class="java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- omap2plus_defconfig  <br /></code></span>

| style="width: 160.1px160px;"|IGEPv5 OMAP5432IGEPv2 DM3730| style="width: 124.9px163px;"| [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: 566px527px;"|<span style="color: #000000;"><code class="java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- <br /> omap2plus_defconfig</code></span>

| style="width: 160.1px160px;"|IGEPv2 DM3730IGEP COM AQUILA AM335x| style="width: 124.9px163px;"| [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: 566px527px;"|<span style="color: #000000;"><code class="java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-am335x_igep0034_defconfig</code></span>

| style="width: 160.1px160px;"|IGEP COM AQUILA AM335xMODULE DM3730/AM3703| style="width: 124.9px163px;"| [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: 566px527px;"|<span style="color: #000000;"><code class="java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-omap2plus_defconfig</code></span>

| style="width: 160.1px160px;"|IGEP COM MODULE DM3730/AM3703SMARC AM335x| style="width: 124.9px163px;"| [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: 566px527px;"|<span style="color: #000000;"><code class="java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_igep0034_defconfig</code></span>

| style="width: 160.1px160px;"|IGEP SMARC iMX6iMX6S/DL/Q| style="width: 124.9px163px;"|[https://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]| style="width: 566px527px;"|<span style="color: #000000;"><code class="java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- imx6_igep0046_defconfig</code></span>

| style="width: 160.1px160px;"|IGEP SMARC AM335xiMX6UL/ULL| style="width: 124.9px;"|[https://git.isee.biz/linux-kernel/linux-omap-2.6imx/blob/isee-linux-vimx_4.9.411_1.90.y0_ga/arch/arm/configs/am335x_igep0034_defconfig am335x_igep0034_defconfigimx6_igep0146_defconfig imx6_igep0146_defconfig]| style="width: 566px527px;"|<span style="color: #000000;"><code class="java plain">make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- am335x_igep0034_defconfig imx6_igep0146_defconfig</code></span>

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

* DTB: located in arch/arm/boot/dts/<target_board>.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 />'''

{| class="contenttable sortable"|-!|BOARD!|DTB NAME|-|||||-|||||-||||style="width: 890px;"

! style="width: 281.467px;"||BOARD! style="width: 588.533px;"||DTB NAME

|style="width: 281.467px;"|IGEPv2 DM3730|style="width: 588.533px;"|[https://git.isee.biz/linux-kernel/linux-omap-2.6/blob/isee-linux-v.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|style="width: 588.533px;"|[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="width: 281.467px;"|IGEP COM AQUILA AM335x|style="width: 588.533px;"||}''' ''' Finally, the last step is to install the modules inside the desired rootfs[https://git.isee. It can be done by typing:  sudo make ARCH=arm CROSS_COMPILE=armbiz/linux-kernel/linux-gnueabihfomap- INSTALL_MOD_PATH= modules_installFor example, if the rootfs is located in a external storage device mounted on the 2.6/blob/media folder:  sudo make ARCH=arm CROSS_COMPILE=armisee-linux-gnueabihf- INSTALL_MOD_PATH=v.4.9.y/arch/arm/mediaboot/rootfsdts/ modules_installPara dar soporte a una nueva board basada en imx en el kernel es necesario tener un fichero de configuracion defconfig (am335x-base0033.config) y&nbsp; una dtbdts am335x-base0033. 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"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">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.) En el caso de igep con procesadores imx <div class="code panel pdl confy/arch/arm/boot/dts/omap5-macro outputigep0050.dts omap5-block" data-hasbody="true" data-macro-name="code"><div class="codeContent panelContent pdl"><div id="highlighter_265765" class="syntaxhighlighter sh-confluence nogutter java">{| cellspacing="0" cellpadding="0" border="0"igep0050.dts]

| classstyle="code"|<div class="container" title="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-base0040ra1281.dts</code></div><div class=467px;"line number3 index2 alt2"><code class="java plain">imx6dl-igep-base0040rc2.dts</code></div>|IGEP SMARC AM335x<div class| style="line number4 index3 alt1"><code class="java plain">imx6dl-igep-base0040rd102width: 588.dts</code></div><div class="line number5 index4 alt2">&nbsp533px;</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><kernel/div><div class="line number10 index9 alt1">&nbsp;</div><div class="line number11 index10 alt2"><code class="java plain">GENERICA</code></div><div class="line number12 index11 alt1"><code class="java plain">imx6qdllinux-igepomap-base0040ra2.dtsi<6/code><blob/div><div class="line number13 index12 alt2"><code class="java plain">imx6qdlisee-igeplinux-base0040rbv.dtsi</code></div><div class="line number14 index13 alt1"><code class="java plain">imx6qdl-igep-igep0046ra4.dtsi</code></div><div class="line number15 index14 alt2"><code class="java plain">imx6qdl-igep-igep0046rc9.dtsi</code></div></div></div>|}</div></div><y/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 confam335x-macro outputigep-block" database0040.dts am335x-hasbody="true" dataigep-macro-name="code"><div class="codeContent panelContent pdl"><div id="highlighter_599857" class="syntaxhighlighter sh-confluence nogutter java">{| cellspacing="0" cellpadding="0" border="0"base0040.dts]

| class="code"|<div class="container" titlestyle="Hintwidth: double-click to select code"><div class="line number1 index0 alt2"><code class="java plain">(dentro de dtb-$(CONFIG_SOC_IMX6Q) += \)</code>  <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-base0040rd102281.dtb \</code></div><div class="line number4 index3 alt1"><code class="java spaces">&nbsp;&nbsp;&nbsp;&nbsp467px;</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>|IGEP SMARC iMX6 Quad|}</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="colorwidth: #808080;"> Yocto Toolchain 1588.2.2-3</span>===<span id="Install" class="mw-headline">Install</span>==<span style="color: #000000533px;">Download -&nbsp;|[httphttps://wwwgit.isee.biz/supportlinux-kernel/downloadslinux-imx/itemblob/igep-sdk-yocto-toolchain-1-2-2-3 isee.biz]</span> <span style="color: #000000;">follow the next steps:</span> * <span style="color: #000000;">Open a terminal</span>* <span style="color: #000000;">Located your downloaded file, in my case is inside /home/jdoe/Downloads:</span> <pre><span style="color: #000000;">jdoe@ubuntu ~ $ cd Downloads/</span></pre>* <span style="color: #000000;">Extract binaries in root directory with root privileges</span> <pre><span style="color: #000000;">jdoe@ubuntu ~/Downloads $ sudo tar jxf igep-sdk-yocto-toolchain-*.tar.bz2 -C /</span></pre>* <span style="color: #000000;">Make sure that binaries are installed correctlyimx_4.</span> <pre><span style="color: #808080;"><span style="color: #000000;">jdoe@ubuntu ~/Downloads $ ls /opt/poky/19.2 111_1.20.1<0_ga/span> <arch/span><arm/pre>==<span id="Configure" class="mw-headline" style="color: #000000;">Configure<boot/span>==<span style="color: #000000;">Open a terminal and type:<dts/span> <pre><span style="color: #000000;"> export PATH=/opt/poky/1.2/sysroots/i686imx6q-pokysdkigep-linux/usr/bin/armv7abase0040rd102.dts imx6q-vfpigep-neon-poky-linux-gnueabi:$PATH </span></pre>=<span id="Compiled_binaries" class="mw-headline" style="color: #000000;">Compiled binaries</span>=<span class="mw-headline" style="color: #808080;">Binaries: latest stable kernel version IGEP OMAP3 devices is:&nbsp;'''2base0040rd102.6.37-12 (20161206)'''</span> {| border="1"dts]

!|<span style="colorwidth: #808080281.467px;">'''Platform'''</span>|IGEP SMARC iMX6 Dual Lite!|<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-imx/blob/isee-imx_4.9.11_1.0.0_ga/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>imx6dl-igep-base0040rd102.dts imx6dl-igep-base0040rd102.dts]

||<span style="colorwidth: #808080281.467px;">IGEP00x0</span>|IGEP SMARC iMX6 Ultra Lite||<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-2.6.37-120.bin]&nbsp;([http:0_ga/arch/downloads.isee.biz/pubarm/releasesboot/linux_kerneldts/v2.6.37imx6ul-12/zImageigep-2base0040rd102.6.37dts imx6ul-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 modulesigep-2base0040rd102.6.37-12dts](, [httphttps://downloadsgit.isee.biz/pub/releases/linux_kernel/v2.6.37linux-12kernel/modules-2.6.37-12.tar.gz.md5 md5sum)]</span>||<span style="color: #808080;">[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/v2.6.37linux-12imx/zImage-2.6.37-12-wilink8.bin.md5 md5sum])<blob/span>||<span style="color: #808080;">[http://downloads.isee.biz/pub/releases/linux_kernel/v2.6.37-12/modules-2imx_4.69.37-12-wilink811_1.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: #808080;">[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;">[http://downloads.isee.biz0_ga/pubarch/releasesarm/linux_kernelboot/v2.6.37-12dts/ti-connectivity-wilink8-0.tar.gz tiimx6ul-connectivityigep-wilink8base0040rd102-0]([http://downloads.iseewifi.biz/pub/releases/linux_kernel/v2.6.37dts imx6ul-12/tiigep-connectivitybase0040rd102-wilink8-0wifi.tar.gz.md5 md5sum)dts]</span>

<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]]