f9af665ee4
* The defconfigs from the RPi Kernel set `powersave` as the default CPU governor, which is a bad idea as that reduces performance by setting the CPU frequency to the minimum one. * In case of a Yocto build user-space is not configured by default to change the CPU governor, so `powersave` will remain the CPU governor and it will slow down everything. * I submitted a fix for those defconfigs to upstream here: https://github.com/raspberrypi/linux/pull/5666 However, we shouldn't wait until that is accepted and backported to all the stable branches (if ever is). * This patch unsets the selection of `powersave` as the default CPU governor. * Then the CPU governor that will be selected as default after this patch will be the Linux's default one that is either `ondemand` or `schedutil` depending on the Kernel version. Signed-off-by: Carlos Alberto Lopez Perez <clopez@igalia.com>
meta-raspberrypi
Yocto BSP layer for the Raspberry Pi boards - http://www.raspberrypi.org/.
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Sponsored by:
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Quick links
- Git repository web frontend: https://github.com/agherzan/meta-raspberrypi
- Mailing list (yocto mailing list): yocto@lists.yoctoproject.org
- Issues management (Github Issues): https://github.com/agherzan/meta-raspberrypi/issues
- Documentation: http://meta-raspberrypi.readthedocs.io/en/latest/
Description
This is the general hardware specific BSP overlay for the RaspberryPi device.
More information can be found at: http://www.raspberrypi.org/ (Official Site)
The core BSP part of meta-raspberrypi should work with different OpenEmbedded/Yocto distributions and layer stacks, such as:
- Distro-less (only with OE-Core).
- Yoe Disto (Video and Camera Products).
- Yocto/Poky (main focus of testing).
Yocto Project Compatible Layer
This layer is officially approved as part of the Yocto Project Compatible Layers Program. You can find details of that on the official Yocto Project
website.
Dependencies
This layer depends on:
- URI: git://git.yoctoproject.org/poky
- branch: master
- revision: HEAD
Quick Start
- source poky/oe-init-build-env rpi-build
- Add this layer to bblayers.conf and the dependencies above
- Set MACHINE in local.conf to one of the supported boards
- bitbake core-image-base
- Use bmaptool to copy the generated .wic.bz2 file to the SD card
- Boot your RPI
Quick Start with kas
- Install kas build tool from PyPi (sudo pip3 install kas)
- kas build meta-raspberrypi/kas-poky-rpi.yml
- Use bmaptool to copy the generated .wic.bz2 file to the SD card
- Boot your RPI
To adjust the build configuration with specific options (I2C, SPI, ...), simply add a section as follows:
local_conf_header:
rpi-specific: |
ENABLE_I2C = "1"
RPI_EXTRA_CONFIG = "dtoverlay=pi3-disable-bt"
To configure the machine, you have to update the machine variable.
And the same for the distro.
For further information, you can read more at https://kas.readthedocs.io/en/latest/index.html
Contributing
You can send patches using the GitHub pull request process or/and through the Yocto mailing list. Refer to the documentation for more information.
Maintainers
- Andrei Gherzan
<andrei at gherzan.com>