How to use vanilla kernel on APF27
By default, the stable kernel version generated by the armadeus BSP for APF27 is 18.104.22.168. Migration toward mainline/vanilla kernel is in progress but not finished.
However some features like CAN or GPIOlib interrupts management are not available under this 2.6.29 version. This page will explain how to build and use a recent kernel with latest armadeus BSP on APF27, for people wanting more features than 2.6.29 can offer.
With recent kernels it is very important to know how to use kernel device tree mechanism !
- Get the latest armadeus BSP development version:
$ git clone git://git.code.sf.net/p/armadeus/code armadeus-head
- Configure the BSP for "mainline" APF27:
$ cd armadeus-head $ make apf27mainline_defconfig
- Build the BSP:
- Update your board (after having copied BSP generated images in your /tftpboot/):
First time you migrate from 2.6.29 to 3.1x+ only:
BIOS> run update_uboot; reset BIOS> run flash_reset_env; reset
Each time you switch from 22.214.171.124 to mainline:
BIOS> run update_dtb BIOS> run update_kernel BIOS> run update_rootfs BIOS> setenv fdt_addr_r 0xa1000000 BIOS> setenv consoledev ttymxc0 BIOS> saveenv
- With recent kernels, framebuffer can support multiple LCDs and so LCD you want to use must be passed as bootargs (like serial port). So you can do (for example):
BIOS> setenv extrabootargs video=imxfb:Chimei-LW700AT9003 BIOS> saveenv
Evolution of migration
See Kernel-upstream-status to know the status of kernel migration.