The purpose of this patch is to enable the automatic provision of a relevant Raspberry Pi 3 Device Tree at runtime, as there currently exists 2 models of Raspberry Pi 3 (model B and model B+) but we only embed the Device Tree for a single one (model B).
Obviously, the provision of only a single Device Tree is inconvenient, as it currently forces users of the model B+ to locate and provide their own Device Tree in config.txt, which might not be a straightforward operation. It also adds to the number of extra files that must be copied to the boot media. With this patch, both Device Tree binaries are embedded in the firmware, with the relevant being served at runtime according to the detected hardware. Note that we tried to future-proof the modified code with regards to expected introduction of new Raspberry Pi platforms (such as the Pi 4). Therefore, while the switch in FdtDxe.c may seem like overkill for now (with cases that could be merged), it should make the reuse of that driver easier. We also tried to harmonize debug output if FtdDxe (avoid acronyms and provide human readable error codes). Pete Batard (1): Platforms/RPi3: Add multiple embedded Device Tree selection Platform/RaspberryPi/RPi3/Drivers/FdtDxe/FdtDxe.c | 54 ++++++++++++++++---- Platform/RaspberryPi/RPi3/Drivers/FdtDxe/FdtDxe.inf | 3 +- Platform/RaspberryPi/RPi3/RPi3.dec | 3 +- Platform/RaspberryPi/RPi3/RPi3.fdf | 6 ++- 4 files changed, 52 insertions(+), 14 deletions(-) -- 2.21.0.windows.1 -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#45434): https://edk2.groups.io/g/devel/message/45434 Mute This Topic: https://groups.io/mt/32840410/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
