View source for Linux Kernel 3.8.y

__TOC__ 

= Introduction  =

This article is for specific 3.8.y Linux kernel branch serie. <br> It is interesting read [[The Linux kernel|The Linux kernel article]] previously. 

On this 3.8.y version, supported IGEP Processor Boards are: 

*IGEP COM AQUILA (IGEP0033)
*IGEPv5 (IGEP0050)

The currently supported IGEP Expansion Boards are as follows: 

*IGEP AQUILA EXPANSION (BASE0033)

Binaries: latest stable kernel version is: '''3.8.13-1 (20140107) for AM335x and 3.8.13-0-omap5 (2014)''' 

{| border="1"
|-
! '''Platform''' 
! '''Sources''' 
! '''zImage binary''' 
! '''Modules binaries''' 
! '''DTB'''
|-
| &nbsp;IGEP0033&nbsp; 
| [http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-1/linux-3.8.13-1.tar.gz 3.8.13-1] ([http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-1/linux-3.8.13-1.tar.gz.md5 md5sum]) 
| [http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-1/zImage-3.8.13-1.bin zImage-3.8.13-1.bin] ([http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-1/zImage-3.8.13-1.bin.md5 md5sum]) 
| [http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-1/modules-3.8.13-1.tar.gz modules-3.8.13-1] ([http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-1/modules-3.8.13-1.tar.gz.md5 md5sum)] 
| [http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-1/am335x-base0033-3.8.13-1.dtb am335x-base0033-3.8.13-1.dtb] ([http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-1/am335x-base0033-3.8.13-1.dtb.md5 md5sum)]
|-
| &nbsp;IGEP0050&nbsp; 
| [http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-0-omap5/linux-3.8.13-0-omap5.tar.gz 3.8.13-0-omap5] ([http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-0-omap5/linux-3.8.13-0-omap5.tar.gz.md5 md5sum]) 
| [http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-0-omap5/zImage-3.8.13-0-omap5.bin zImage-3.8.13-0-omap5.bin] ([http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-0-omap5/zImage-3.8.13-0-omap5.bin.md5 md5sum]) 
| [http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-0-omap5/modules-3.8.13-0-omap5.tar.gz modules-3.8.13-0-omap5] ([http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-0-omap5/modules-3.8.13-0-omap5.tar.gz.md5 md5sum)] 
| [http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-0-omap5/omap5-igep0050-3.8.13-0-omap5.dtb omap5-igep0050-3.8.13-0-omap5.dtb] ([http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-0-omap5/omap5-igep0050-3.8.13-0-omap5.dtb.md5 md5sum)]
|}

= Build kernel from sources  =

'''Download''' the latest stable version sources and follow next steps: 

For IGEP COM AQUILA

 wget http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-1/linux-3.8.13-1.tar.gz

Or for IGEPv5

 wget http://downloads.isee.biz/pub/releases/linux_kernel/v3.8.13-0-omap5/linux-3.8.13-0-omap5.tar.gz

 tar xzf linux-[kernel version].tar.gz
 cd [kernel version]

Also, it could download from GIT Repositories ([http://git.isee.biz/ http://git.isee.biz/]) and test the last unstable version at your own risk (see "''Linux mainline tree (development)''" chapter in [[The Linux kernel]])<br> 

'''Configure''' Linux kernel for IGEP devices. IGEP is ARM architecture based device. A generic configuration is provided for all IGEP machines, and can be used as the default by 

 make ARCH=arm omap2plus_defconfig

Then '''build''' the kernel, the kernel modules and the device tree files. The result will be an ''zImage'' file in arch/arm/boot directory. Execute: 

 make ARCH=arm CROSS_COMPILE=[your cross compiler] zImage modules dtbs

<br> You can '''install''' the kernel modules to your target rootfs 

 make ARCH=arm CROSS_COMPILE=[your cross compiler] INSTALL_MOD_PATH=[path to your target rootfs] modules_install

= Adding New Expansion Boards  =

This chapter is meant to be a starting point for people to learn how to add your own expansion board in three steps. 

TODO 

= Example: Enable UART2 on IGEP AQUILA EXPANSION (P9.21-P9.22)  =


<pre>
diff --git a/arch/arm/boot/dts/am335x-base0033.dts b/arch/arm/boot/dts/am335x-base0033.dts
index 9729832..de22fd8 100644
--- a/arch/arm/boot/dts/am335x-base0033.dts
+++ b/arch/arm/boot/dts/am335x-base0033.dts
@@ -126,6 +126,13 @@
             0x168 0x1f    /* uart0_ctsn.gpio1_8 */
         &gt;;
     };
+
+    uart2_pins: pinmux_uart2_pins {
+        pinctrl-single,pins = &lt;
+            0x150 0x21    /* spi0_sclk.uart2_rxd | MODE1 */
+            0x154 0x01    /* spi0_d0.uart2_txd | MODE1 */
+        &gt;;
+    };
 };
 
 &amp;mcasp0 {
@@ -147,3 +154,11 @@
     rx-num-evt = &lt;1&gt;;
 };
 
+&amp;uart3 { /* really uart2 */
+&nbsp;&nbsp;&nbsp; status = "okay";
+
+&nbsp;&nbsp;&nbsp; pinctrl-names = "default";
+&nbsp;&nbsp;&nbsp; pinctrl-0 = &lt;&amp;uart2_pins&gt;;
+};
+
</pre> 

= Known issues  =

Not for now 

= Changelog AM335x =
*[http://git.isee.biz/?p=pub/scm/linux-omap-2.6.git;a=commit;h=86a5e07ad67233d04ce56a2aad0d847730f4bdf5 Release 3.8.13-1] 
** Enable support for USB Ethernet Gadget
** Add 32KBit EEPROM support
*[http://git.isee.biz/?p=pub/scm/linux-omap-2.6.git;a=commit;h=7716998dc39f4c734d7cf0e44e7f4f38297b4c46 Release 3.8.13-0] 
**First release for 3.8.y series

= Changelog OMAP5 =
*[http://git.isee.biz/?p=pub/scm/linux-omap-2.6.git;a=commit;h=667cf42fcef4921d3b36754b5b1d68cefcab7285 Release 3.8.13-0-omap5] 
**First release for 3.8.y series

[[Category:Linux_Kernel]]