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

Message ID ab9ab3536baf5fdf6016f2a01044f00034189291.1742418429.git.andrea.porta@suse.com
State New
Headers show
Series Add support for RaspberryPi RP1 PCI device using a DT overlay | expand

Commit Message

Andrea della Porta March 19, 2025, 9:52 p.m. UTC 
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
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Patch

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"
+};