Commit 6f999784 authored by Yann E. MORIN's avatar Yann E. MORIN Committed by Thomas Petazzoni
Browse files

boards/raspberrypi: update instructions 



Now that we have a sanitised set of defconfig files, and we no longer
support non-DT setups, update and simplify the board readme file.

Signed-off-by: default avatar"Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Floris Bos <bos@je-eigen-domein.nl>
Cc: Pascal de Bruijn <pmjdebruijn@pcode.nl>
Signed-off-by: default avatarThomas Petazzoni <thomas.petazzoni@free-electrons.com>
parent 76b00bde

board/raspberrypi/readme.txt

+22 −26
Original line number Diff line number Diff line
@@ -22,17 +22,14 @@ How to build it 
Configure Buildroot

-------------------



The raspberrypi_defconfig configuration is a minimal configuration with

all that is required to bring the Raspberry Pi up. You should base your

work on this defconfig:

There are two RaspberryPi defconfig files in Buildroot, one for each

major variant, which you should base your work on:



  $ make raspberrypi_defconfig



Alternatively, if you want to test support for the Device Tree:

For models A, B, A+ or B+:



  $ make raspberrypi_dt_defconfig

  $ make raspberrypi_defconfig



For Raspberry Pi 2 use a different defconfig:

And for model 2 B:



  $ make raspberrypi2_defconfig
@@ -66,18 +63,21 @@ After building, you should obtain this tree: 
    output/images/

    +-- rootfs.tar                  [0]

    +-- rpi-firmware/

    |   +-- bcm2708-rpi-b.dtb

    |   +-- bcm2708-rpi-b-plus.dtb

    |   +-- bcm2709-rpi-2-b.dtb

    |   +-- bootcode.bin

    |   +-- config.txt

    |   +-- fixup.dat

    |   `-- start.elf

    +-- bcm2708-rpi-b.dtb           [1]

    +-- bcm2708-rpi-b-plus.dtb      [1]

    +-- bcm2709-rpi-2-b.dtb         [1]

    `-- zImage



[0] Note for Volatile: rootfs.tar will only be there if you kept

    "tar the root filesystem" option selected in "Filesystem images".



[1] Not all of them will be present, depending on the RaspberryPi

    model you are using.



Prepare you SDCard

==================
@@ -105,30 +105,26 @@ Install the binaries to the SDCard 
At the root of the boot partition, the Raspberry Pi must find the following

files:



    * bcm2708-rpi-b.dtb         [1]

    * bcm2708-rpi-b-plus.dtb    [2]

    * bcm2709-rpi-2-b.dtb       [3]

    * bcm2708-rpi-b.dtb         [2]

    * bcm2708-rpi-b-plus.dtb    [3]

    * bcm2709-rpi-2-b.dtb       [4]

    * bootcode.bin

    * config.txt

    * fixup.dat

    * start.elf

    * zImage



[1] For models A and B

[2] For models A+ and B+

[3] For model 2

[2] For models A and B

[3] For models A+ and B+

[4] For model 2



For example:



  $ cp output/images/rpi-firmware/* /mnt/mountpointboot

  $ cp output/images/*.dtb /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:

The kernel image must be marked with a special header so that the

bootloader of the RaspberryPi knows it supports Device Tree:



  $ ./output/host/usr/bin/mkknlimg output/images/zImage /mnt/mountpointboot/zImage