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| author | Yann E. MORIN <yann.morin.1998@free.fr> | 2015-01-10 14:14:58 +0100 |
|---|---|---|
| committer | Thomas Petazzoni <thomas.petazzoni@free-electrons.com> | 2015-01-10 15:46:49 +0100 |
| commit | bb60ad9ba4e009d4a4bbac7b5abd9561ef17e9db (patch) | |
| tree | 3aaa0fe8bf75fcf3f1c4c376e6484c0d8fbf6637 /board/raspberrypi | |
| parent | 23da43ae124fb5a0cc7254a4e23936610c0e15ec (diff) | |
boards/raspberrypi: update readme with Device Tree instructions
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'board/raspberrypi')
| -rw-r--r-- | board/raspberrypi/readme.txt | 31 |
1 files changed, 27 insertions, 4 deletions
diff --git a/board/raspberrypi/readme.txt b/board/raspberrypi/readme.txt index a6d3dd478..725ad9dc9 100644 --- a/board/raspberrypi/readme.txt +++ b/board/raspberrypi/readme.txt @@ -23,6 +23,10 @@ work on this defconfig: $ make raspberrypi_defconfig +Alternatively, if you want to test support for the Device Tree: + + $ make raspberrypi_dt_defconfig + If you want to use a persistent rootfs, skip to "Build the rootfs", below. For a volatile rootfs, you have to slightly adjust the configuration: @@ -51,16 +55,22 @@ Result of the build After building, you should obtain this tree: output/images/ - +-- rootfs.tar - +-- rpi-firmware + +-- rootfs.tar [0] + +-- rpi-firmware/ + | +-- bcm2708-rpi-b.dtb [1] + | +-- bcm2708-rpi-b-plus.dtb [1] | +-- bootcode.bin | +-- config.txt | +-- fixup.dat | `-- start.elf `-- zImage -Note for Volatile: rootfs.tar will only be there if you kept -"tar the root filesystem" option selected in "Filesystem images". +[0] Note for Volatile: rootfs.tar will only be there if you kept + "tar the root filesystem" option selected in "Filesystem images". + +[1] The DTBs (Device Tree Blobs) will only be present if you setup + Buildroot to install the DTBs from the rpi-firmware package, and + will only be used if your kernel has support for the Device Tree. Prepare you SDCard ================== @@ -89,17 +99,30 @@ Install the binaries to the SDCard At the root of the boot partition, the RaspberryPi must find the following files: + * bcm2708-rpi-b.dtb [2] + * bcm2708-rpi-b-plus.dtb [2] * bootcode.bin * config.txt * fixup.dat * start.elf * zImage +[2] Only needed if your kernel has support for the Device Tree. + For example: $ cp output/images/rpi-firmware/* /mnt/mountpointboot + +If your kernel does *not* have support for the Device Tree, then install +it with: + $ cp output/images/zImage /mnt/mountpointboot +If your kernel *does* have support for the Device Tree, then install it +with: + + $ ./output/host/usr/bin/mkknlimg output/images/zImage /mnt/mountpointboot/zImage + Note: The kernel image file name is defined in config.txt like this: kernel=zImage |