[PATCH v8 10/13] arm64: dts: Add overlay for RP1 device

Andrea della Porta
2025-03-19T22:17:26Z

Define the RP1 node in an overlay. The inclusion tree is
as follow (the arrow points to the includer):

rp1.dtso
^
|
rp1-common.dtsi ----> rp1-nexus.dtsi

Signed-off-by: Andrea della Porta <andrea.porta@suse.com>
---
This patch can be considered optional, since it fills just the second
scenario as detailed in [1], which is the RP1 DT node loaded from a dtb
overlay by the FW at early boot stage.
This may be useful for debug purpose, but as such not strictly necessary.

[1] https://lore.kernel.org/all/CAMEGJJ0f4YUgdWBhxvQ_dquZHztve9KO7pvQjoDWJ3=zd3cgcg@mail.gmail.com/#t
---
arch/arm64/boot/dts/broadcom/Makefile | 3 ++-
arch/arm64/boot/dts/broadcom/rp1.dtso | 11 +++++++++++
2 files changed, 13 insertions(+), 1 deletion(-)
create mode 100644 arch/arm64/boot/dts/broadcom/rp1.dtso

diff --git a/arch/arm64/boot/dts/broadcom/Makefile b/arch/arm64/boot/dts/broadcom/Makefile
index 4836c6da5bee..58293f9c16ab 100644
--- a/arch/arm64/boot/dts/broadcom/Makefile
+++ b/arch/arm64/boot/dts/broadcom/Makefile
@@ -13,7 +13,8 @@ dtb-$(CONFIG_ARCH_BCM2835) += bcm2711-rpi-400.dtb \
bcm2837-rpi-3-b.dtb \
bcm2837-rpi-3-b-plus.dtb \
bcm2837-rpi-cm3-io3.dtb \
- bcm2837-rpi-zero-2-w.dtb
+ bcm2837-rpi-zero-2-w.dtb \
+ rp1.dtbo

subdir-y += bcmbca
subdir-y += northstar2
diff --git a/arch/arm64/boot/dts/broadcom/rp1.dtso b/arch/arm64/boot/dts/broadcom/rp1.dtso
new file mode 100644
index 000000000000..ab4f146d22c0
--- /dev/null
+++ b/arch/arm64/boot/dts/broadcom/rp1.dtso
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+
+/dts-v1/;
+/plugin/;
+
+&pcie2 {
+ #address-cells = <3>;
+ #size-cells = <2>;
+
+ #include "rp1-nexus.dtsi"
+};
--
2.35.3