aboutsummaryrefslogtreecommitdiff
path: root/board/raspberrypi
diff options
context:
space:
mode:
authorGravatar Yann E. MORIN <yann.morin.1998@free.fr>2015-01-10 14:14:58 +0100
committerGravatar Thomas Petazzoni <thomas.petazzoni@free-electrons.com>2015-01-10 15:46:49 +0100
commitbb60ad9ba4e009d4a4bbac7b5abd9561ef17e9db (patch)
tree3aaa0fe8bf75fcf3f1c4c376e6484c0d8fbf6637 /board/raspberrypi
parent23da43ae124fb5a0cc7254a4e23936610c0e15ec (diff)
downloadbuildroot-bb60ad9ba4e009d4a4bbac7b5abd9561ef17e9db.tar.gz
buildroot-bb60ad9ba4e009d4a4bbac7b5abd9561ef17e9db.tar.bz2
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.txt31
1 files changed, 27 insertions, 4 deletions
diff --git a/board/raspberrypi/readme.txt b/board/raspberrypi/readme.txt
index a6d3dd4787..725ad9dc9e 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