Difference between revisions of "Kernel-with-device-tree"
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==kernel== | ==kernel== | ||
| − | The kernel 3.4 has already the support | + | The kernel 3.4 has already the support of some arm SoC. |
* imxl (apf9328) : no | * imxl (apf9328) : no | ||
| Line 26: | Line 26: | ||
* imx28 (apf28) : no | * imx28 (apf28) : no | ||
| − | So apf27 and apf51 can use device tree. | + | So apf27 and apf51 can use device tree, but there isn't the dts file |
| + | for armadeus board. | ||
| + | |||
| + | A dts file should be added for all board with a supported SoC (apf27 and apf51). | ||
=Running= | =Running= | ||
Revision as of 19:25, 16 June 2012
Contents
Compilation
To use device tree on arm both bootloader (u-boot) and kernel should be compiled with the support of device tree.
u-boot
To enable device tree on u-boot, it's quite simple, just add "#define CONFIG_OF_LIBFDT" in your configuration file (include/configs/<board>.h).
On armadeus SDK, this file is in this directory: buildroot/target/device/armadeus/<board>/<board>-u-boot-<version>.h
For example, for u-boot 2012.04 on apf27, it's: buildroot/target/devg=ice/armadeus/apf27/apf27-u-boot-2012.04.h
NOTE: on u-boot 2012.04, the command bootm with device tree is broken. If you want to use it,
you need to fix it with the following patch: http://git.denx.de/?p=u-boot.git;a=commit;h=1723997610ace497252d6f9a44ec76c06951ae43
kernel
The kernel 3.4 has already the support of some arm SoC.
- imxl (apf9328) : no
- imx27 (apf27) : yes
- imx51 (apf51) : yes
- imx28 (apf28) : no
So apf27 and apf51 can use device tree, but there isn't the dts file for armadeus board.
A dts file should be added for all board with a supported SoC (apf27 and apf51).
