Difference between revisions of "How to use vanilla kernel on APF27"

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With recent kernel it is also important to know how to use kernel [[device tree]]
 
With recent kernel it is also important to know how to use kernel [[device tree]]
  
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== Get the trunk version ==
+
== mainline target ==
  
−
Get the latest trunk version with command :
+
* Get the latest trunk version with command :
 
<pre class="host">
 
<pre class="host">
−
$ git clone git://git.code.sf.net/p/armadeus/code apf27
+
$ git clone git://git.code.sf.net/p/armadeus/code armadeus-trunk
 
</pre>
 
</pre>
  
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Configure the view for APF27 :
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* Configure the view for APF28 "mainline" :
 
<pre class="host">
 
<pre class="host">
−
$ make apf27_defconfig
+
$ cd armadeus-trunk
 +
$ make apf27mainline_defconfig
 
</pre>
 
</pre>
  
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On menuconfig select :
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* Update your board:
−
<pre class="config">
+
−
Toolchain  --->
+
−
    Kernel Headers (Linux 2.6 (manually specified version))  --->
+
−
    (3.12.4) linux version
+
−
[...]
+
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System configuration  --->
+
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    (ttymxc0) Port to run a getty (login prompt) on
+
−
[...]
+
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Kernel  --->
+
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    (3.12.4) Kernel version
+
−
</pre>
+
−
 
+
−
Then make :
+
−
<pre class="host">
+
−
$ make
+
−
</pre>
+
−
 
+
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== U-Boot modification ==
+
−
 
+
−
Serial port names have been unified to /dev/ttymxc[0-6]. So if you want to see something on your serial console please do the following before booting:  
+
 
<pre class="apf">
 
<pre class="apf">
−
BIOS> setenv console console=ttymxc0,115200
+
BIOS> run update_uboot; reset
 +
BIOS> run flash_reset_env; reset
 +
BIOS> setenv fdt_addr_r A0008000
 +
BIOS> saveenv
 +
BIOS> run update_dtb
 +
BIOS> run update_kernel
 +
BIOS> run update_rootfs
 
</pre>
 
</pre>
−
 
−
* Framebuffer can now support multiple LCDs and so LCD you want to use must be passed as bootparam (like serial port). So you can do (for example):
 
−
<pre class="apf">
 
−
BIOS> setenv console console=ttymxc0,115200 video=imxfb:Chimei-LW700AT9003
 
−
</pre>
 
−
 
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== Evolution of migration ==
 
−
 
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See [[Kernel-upstream-status]] to know the status of kernel migration.
 

Revision as of 09:11, 6 December 2013


By default, the kernel for APF27 is the 2.6.29.6. Migration for the kernel upstream is in progress but not finished, and some features like CAN or GPIOlib interrupts management are not available under kernel 2.6.29. This article explain how to use a recent kernel with latest armadeus trunk on APF27.

With recent kernel it is also important to know how to use kernel device tree

mainline target

  • Get the latest trunk version with command :
$ git clone git://git.code.sf.net/p/armadeus/code armadeus-trunk
  • Configure the view for APF28 "mainline" :
$ cd armadeus-trunk
$ make apf27mainline_defconfig
  • Update your board:
BIOS> run update_uboot; reset
BIOS> run flash_reset_env; reset
BIOS> setenv fdt_addr_r A0008000
BIOS> saveenv
BIOS> run update_dtb
BIOS> run update_kernel
BIOS> run update_rootfs
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