Difference between revisions of "How to use vanilla kernel on APF28"

Latest revision as of 16:07, 28 March 2017

By default, the kernel for APF28 is the 2.6.35 version (from Freescale BSP). Migration to Mainline (3.1x+) is in progress but not finished, this article explains how to use (test) these kernels with latest armadeus master branch.

Mainline support is done with Device Tree.

Lazy guys instructions

Get the latest master version with command :

$ git clone git://git.code.sf.net/p/armadeus/code armadeus-master

Configure the view for APF28 "mainline" :

$ cd armadeus-master
$ make apf28mainline_defconfig

Update your board:

BIOS> run update_uboot; reset
BIOS> run flash_reset_env; reset
BIOS> setenv fdt_addr_r 41000000
BIOS> setenv consoledev ttyAMA0
BIOS> saveenv
BIOS> run update_dtb
BIOS> run update_kernel
BIOS> run update_rootfs

For the one who wants to know the details

Get the latest master branch version with command :

$ git clone git://git.code.sf.net/p/armadeus/code armadeus-master

Configure the view for APF28 :

$ cd armadeus-master
$ make apf28_defconfig

On menuconfig select :

Toolchain  --->
    Kernel Headers (Linux 2.6 (manually specified version))  --->
    (3.8) linux version
...
System configuration  --->
    (ttyAMA0) Port to run a getty (login prompt) on
...
Kernel  --->
    (3.8) Kernel version
    (40008000) load address (for 3.7+ multi-platform image)
    (../patches/linux/$(BR2_LINUX_KERNEL_VERSION)) Custom kernel patches
    (imx28-apf28dev) Device Tree Source file names

Then build :

$ make

U-Boot modification

Linux nand driver has changed on kernel 3.8, then U-Boot code must be modified to match it (maybe now no more needed, since 3.12 ??).
- Edit file :

buildroot/target/device/armadeus/apf28/apf28-u-boot-2013.04.h

- And change line 153:

#define CONFIG_MTDMAP			"gpmi-nand"

- Then re-build U-Boot:

make uboot-dirclean; make uboot;

- you will have to reflash U-Boot on your APF28 and probably cleanup your environment variables:

BIOS> run flash_reset_env

Serial port used for console has now a different name: ttyAMA0. So if you want to see something on your serial console please do the following before booting:

BIOS> setenv consoledev ttyAMA0

Kernel 3.8 use device tree, then this paramter must be set too:

BIOS> setenv fdt_addr_r 41000000
BIOS> saveenv

To boot with NFS boot use:

BIOS> run nfsboot

But nand boot work now, just don't forget to update the dtb (if you run update_all it's already done):

BIOS> run update_dtb
BIOS> boot

Which devices are supported ?

Kernel-upstream-status

Roadmap

SPI
touchscreen

@@ Line 1: / Line 1: @@
+[[Category: kernel]]
 By default, the kernel for APF28 is the 2.6.35 version (from Freescale BSP).
-Migration to '''Mainline (3.8+)''' is in progress but not finished, this article explains how to use (test) these kernels with latest armadeus trunk.
+Migration to '''Mainline (3.1x+)''' is in progress but not finished, this article explains how to use (test) these kernels with latest armadeus master branch.
 Mainline support is done with [[Kernel-with-device-tree|Device Tree]].
-== Get the trunk version ==
+==Lazy guys instructions==
+* Get the latest master version with command :
+<pre class="host">
+$ git clone git://git.code.sf.net/p/armadeus/code armadeus-master
+</pre>
-* Get the latest trunk version with command :
+* Configure the view for APF28 "mainline" :
 <pre class="host">
-$ git clone git://git.code.sf.net/p/armadeus/code armadeus-trunk
+$ cd armadeus-master
+$ make apf28mainline_defconfig
+</pre>
+* Update your board:
+<pre class="apf">
+BIOS> run update_uboot; reset
+BIOS> run flash_reset_env; reset
+BIOS> setenv fdt_addr_r 41000000
+BIOS> setenv consoledev ttyAMA0
+BIOS> saveenv
+BIOS> run update_dtb
+BIOS> run update_kernel
+BIOS> run update_rootfs
+</pre>
+== For the one who wants to know the details ==
+* Get the latest master branch version with command :
+<pre class="host">
+$ git clone git://git.code.sf.net/p/armadeus/code armadeus-master
 </pre>
 * Configure the view for APF28 :
 <pre class="host">
-$ cd armadeus-trunk
+$ cd armadeus-master
 $ make apf28_defconfig
 </pre>
@@ Line 38: / Line 64: @@
 </pre>
-== U-Boot modification ==
+=== U-Boot modification ===
+* Linux nand driver has changed on kernel 3.8, then U-Boot code must be modified to match it (maybe now no more needed, since 3.12 ??).
+** Edit file :
+<pre class="config">
+buildroot/target/device/armadeus/apf28/apf28-u-boot-2013.04.h
+</pre>
+** And change line 153:
+<pre class="config">
+#define CONFIG_MTDMAP			"gpmi-nand"
+</pre>
+** Then re-build U-Boot:
+<pre class="host">
+make uboot-dirclean; make uboot;
+</pre>
+** you will have to reflash U-Boot on your APF28 and probably cleanup your environment variables:
+<pre class="apf">
+BIOS> run flash_reset_env
+</pre>
 * Serial port used for console has now a different name: ttyAMA0. So if you want to see something on your serial console please do the following before booting:
 <pre class="apf">
-BIOS> setenv console console=ttyAMA0,115200n8
 BIOS> setenv consoledev ttyAMA0
 </pre>
-* Currently, only [[Network_File_System_configuration#Boot_from_NFS |  NFS boot]] have been tested:
+* Kernel 3.8 use [[Kernel-with-device-tree |device tree]], then this paramter must be set too:
+<pre class="apf">
+BIOS> setenv fdt_addr_r 41000000
+BIOS> saveenv
+</pre>
+* To boot with [[Network_File_System_configuration#Boot_from_NFS |  NFS boot]] use:
 <pre class="apf">
 BIOS> run nfsboot
+</pre>
+* But nand boot work now, just don't forget to update the dtb (if you run update_all it's already done):
+<pre class="apf">
+BIOS> run update_dtb
+BIOS> boot
 </pre>
 ==Which devices are supported ?==
-* [[APF28_Linux_kernel_status]]
+* [[Kernel-upstream-status]]
 ==Roadmap==
 # SPI
 # touchscreen

Difference between revisions of "How to use vanilla kernel on APF28"

Latest revision as of 16:07, 28 March 2017

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Lazy guys instructions

For the one who wants to know the details

U-Boot modification

Which devices are supported ?

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