Hi Peter, Taking another look at https://github.com/raspberrypi/firmware.git I see that the README says that the .dtb files are build from Linux. So it seems I can simply grab them from there.
Regards, Simon On Fri, 3 Dec 2021 at 05:16, Peter Robinson <pbrobin...@gmail.com> wrote: > > On Thu, Dec 2, 2021 at 6:26 PM Simon Glass <s...@chromium.org> wrote: > > > > Hi Mark, > > > > On Thu, 2 Dec 2021 at 10:34, Mark Kettenis <mark.kette...@xs4all.nl> wrote: > > > > > > > From: Simon Glass <s...@chromium.org> > > > > Date: Thu, 2 Dec 2021 08:59:01 -0700 > > > > > > > > Add this file, obtained from the Raspbian boot disk, so there is a > > > > reference devicetree in the U-Boot tree. The same one is used for > > > > 32- and 64-bit variants. > > > > > > > > Note that U-Boot does not normally need this at runtime, since > > > > CONFIG_OF_BOARD is enabled. The previous firmware stage provides a > > > > devicetree at runtime. > > > > > > > > Signed-off-by: Simon Glass <s...@chromium.org> > > > > --- > > > > > > > > (no changes since v1) > > > > > > > > arch/arm/dts/Makefile | 3 +- > > > > arch/arm/dts/bcm2711-rpi-4-b.dts | 1958 ++++++++++++++++++++++++++++++ > > > > configs/rpi_4_32b_defconfig | 1 + > > > > configs/rpi_4_defconfig | 1 + > > > > configs/rpi_arm64_defconfig | 1 + > > > > 5 files changed, 1963 insertions(+), 1 deletion(-) > > > > create mode 100644 arch/arm/dts/bcm2711-rpi-4-b.dts > > > > > > > > diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile > > > > index 2d92b2f940d..9cddab37207 100644 > > > > --- a/arch/arm/dts/Makefile > > > > +++ b/arch/arm/dts/Makefile > > > > @@ -1077,7 +1077,8 @@ dtb-$(CONFIG_ARCH_BCM283X) += \ > > > > bcm2837-rpi-3-a-plus.dtb \ > > > > bcm2837-rpi-3-b.dtb \ > > > > bcm2837-rpi-3-b-plus.dtb \ > > > > - bcm2837-rpi-cm3-io3.dtb > > > > + bcm2837-rpi-cm3-io3.dtb \ > > > > + bcm2711-rpi-4-b.dtb > > > > > > > > dtb-$(CONFIG_ARCH_BCM63158) += \ > > > > bcm963158.dtb > > > > diff --git a/arch/arm/dts/bcm2711-rpi-4-b.dts > > > > b/arch/arm/dts/bcm2711-rpi-4-b.dts > > > > new file mode 100644 > > > > index 00000000000..425e9fb91c4 > > > > --- /dev/null > > > > +++ b/arch/arm/dts/bcm2711-rpi-4-b.dts > > > > @@ -0,0 +1,1958 @@ > > > > +// SPDX-License-Identifier: GPL-2.0+ OR MIT > > > > +/* > > > > + * Sample device tree for rpi_4 > > > > + > > > > + * Copyright 2021 Google LLC > > > > + */ > > > > > > This is of course an utter lie. This wasn't written from scratch by a > > > Google employee. > > > > > > The original copyright and license for the dtb files you > > > "disassembled" applies. You don't specify exactly where you obtained > > > the file from, but it probably came from here: > > > > > > https://github.com/raspberrypi/firmware > > > > > > And the README.md for that repo states that: > > > > > > "The dtbs, overlays and associated README are built from Linux > > > kernel sources, released under the GPL (see boot/COPYING.linux)" > > > > > > They're probably talking about their own fork of the Linux kernel > > > sources here as there are still differences between their device trees > > > and the the device trees in the official Linux tree. But if you > > > insist on having a device tree in the U-Boot tree, that's where you > > > should look. > > > > IANAL and didn't consider this point. > > > > I got this from the boot disk (using fdtdump) and it does not include > > a copyright message. I'll change this in the next version. > > Should probably just get the original one from their upstream source > repo then rather than decompiling it.
