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The commit689b9ac439(package/rpi-firmware: rework boot/config file handling) has split in two the property: dtoverlay=miniuart-bt,krnbt=on Into: dtoverlay=miniuart-bt dtoverlay=krnbt=on The initial property contained the dtbo file miniuart-bt[1] and its parameter krnbt=on[2][3]. The first syntax is correct while the second is not. The krnbt=on is not a dtoverlay[4] but a dtparam[5]. Therefore the property dtparam must be used instead. This fixes: # cat /sys/firmware/devicetree/base/chosen/user-warnings Failed to load overlay 'krnbt=on' [1]: https://github.com/raspberrypi/linux/blob/rpi-5.10.y/arch/arm/boot/dts/overlays/miniuart-bt-overlay.dts [2]: https://github.com/raspberrypi/linux/blob/rpi-5.10.y/arch/arm/boot/dts/overlays/miniuart-bt-overlay.dts#L91 [3]: https://github.com/raspberrypi/linux/blob/rpi-5.10.y/arch/arm/boot/dts/overlays/README#L213-L215 [4]: https://www.raspberrypi.com/documentation/computers/config_txt.html#dtoverlay [5]: https://www.raspberrypi.com/documentation/computers/config_txt.html#dtparam Signed-off-by: Gaël PORTAY <gael.portay@rtone.fr> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> (cherry picked from commit5be42d8da3) Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches