d6d0f73a2e
Without this patch, the devicetree used by linux at runtime is
the u_boot devicetree.
While using rusticl on the khadas vim3 board with the default
extlinux.conf, mesa's panfrost driver return "gpu shed timeout"
errors. Adding "devicetree /meson-g12b-khadas-vim3.dtb" to the
extlinux.conf file solve the problem. Linux successfully boot
with and without the change but without this patch the devicetree
used by linux at runtime is the u-boot devicetree.
The differences between the u-boot devicetree and the linux
devicetree are:
-The u-boot devicetree contains two more nodes than the linux devicetree. Those nodes are:
- smbios : compatible option is set to "u-boot,sysinfo-smbios".
- __symbols__ : present if -@ or --symbols is used during the devicetree compilation.
-Most of u-boot devicetree nodes have a "phandle" property.
-SoC and vpu have a "u-boot,dm-pre-reloc;" property.
-Some aliases are different.
-The u-boot operating points tables contains more nodes.
The size difference between the u-boot devicetree and the linux
devicetree is approximately 3.5kB.
During runtime, the linux devicetree have the "phandle" and
"u-boot,dm-pre-reloc;" properties and the smbios node. So,
The runtime devicetree is the one from u-boot.
Signed-off-by: Antoine Coutant <antoine.coutant@smile.fr>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
|
||
|---|---|---|
| arch | ||
| board | ||
| boot | ||
| configs | ||
| docs | ||
| fs | ||
| linux | ||
| package | ||
| support | ||
| system | ||
| toolchain | ||
| utils | ||
| .checkpackageignore | ||
| .clang-format | ||
| .defconfig | ||
| .editorconfig | ||
| .flake8 | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .shellcheckrc | ||
| CHANGES | ||
| Config.in | ||
| Config.in.legacy | ||
| COPYING | ||
| DEVELOPERS | ||
| Makefile | ||
| Makefile.legacy | ||
| README | ||
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