[PATCH v3 5/6] openrisc: dts: Split simple smp dts to dts and dtsi

Stafford Horne
2026-01-09T13:44:43Z

Split out the common memory, CPU and PIC definitions of the simple SMP
system to a DTSI file which we will later use for our De0 Nano multicore
board device tree. We also take this opportunity to swich underscores
to dashes as that seems to be the more common convention for DTS files.

Signed-off-by: Stafford Horne <shorne@gmail.com>
---
Since v2:
- Sort blocks alphabetically.

arch/openrisc/boot/dts/simple-smp.dts | 25 +++++++++++++++++++
.../dts/{simple_smp.dts => simple-smp.dtsi} | 11 ++++----
arch/openrisc/configs/simple_smp_defconfig | 2 +-
3 files changed, 31 insertions(+), 7 deletions(-)
create mode 100644 arch/openrisc/boot/dts/simple-smp.dts
rename arch/openrisc/boot/dts/{simple_smp.dts => simple-smp.dtsi} (90%)

diff --git a/arch/openrisc/boot/dts/simple-smp.dts b/arch/openrisc/boot/dts/simple-smp.dts
new file mode 100644
index 000000000000..01cf219e6aac
--- /dev/null
+++ b/arch/openrisc/boot/dts/simple-smp.dts
@@ -0,0 +1,25 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/dts-v1/;
+
+#include "simple-smp.dtsi"
+
+/ {
+ model = "Simple SMP Board";
+};
+
+&cpu0 {
+ clock-frequency = <20000000>;
+};
+
+&cpu1 {
+ clock-frequency = <20000000>;
+};
+
+&enet0 {
+ status = "okay";
+};
+
+&serial0 {
+ clock-frequency = <20000000>;
+};
diff --git a/arch/openrisc/boot/dts/simple_smp.dts b/arch/openrisc/boot/dts/simple-smp.dtsi
similarity index 90%
rename from arch/openrisc/boot/dts/simple_smp.dts
rename to arch/openrisc/boot/dts/simple-smp.dtsi
index 71af0e117bfe..42d6eda33b71 100644
--- a/arch/openrisc/boot/dts/simple_smp.dts
+++ b/arch/openrisc/boot/dts/simple-smp.dtsi
@@ -1,4 +1,3 @@
-/dts-v1/;
/ {
compatible = "opencores,or1ksim";
#address-cells = <1>;
@@ -22,15 +21,15 @@ memory@0 {
cpus {
#address-cells = <1>;
#size-cells = <0>;
- cpu@0 {
+
+ cpu0: cpu@0 {
compatible = "opencores,or1200-rtlsvn481";
reg = <0>;
- clock-frequency = <20000000>;
};
- cpu@1 {
+
+ cpu1: cpu@1 {
compatible = "opencores,or1200-rtlsvn481";
reg = <1>;
- clock-frequency = <20000000>;
};
};

@@ -57,7 +56,6 @@ serial0: serial@90000000 {
compatible = "opencores,uart16550-rtlsvn105", "ns16550a";
reg = <0x90000000 0x100>;
interrupts = <2>;
- clock-frequency = <20000000>;
};

enet0: ethoc@92000000 {
@@ -65,5 +63,6 @@ enet0: ethoc@92000000 {
reg = <0x92000000 0x800>;
interrupts = <4>;
big-endian;
+ status = "disabled";
};
};
diff --git a/arch/openrisc/configs/simple_smp_defconfig b/arch/openrisc/configs/simple_smp_defconfig
index 6008e824d31c..db77c795225e 100644
--- a/arch/openrisc/configs/simple_smp_defconfig
+++ b/arch/openrisc/configs/simple_smp_defconfig
@@ -20,7 +20,7 @@ CONFIG_SLUB=y
CONFIG_SLUB_TINY=y
CONFIG_MODULES=y
# CONFIG_BLOCK is not set
-CONFIG_BUILTIN_DTB_NAME="simple_smp"
+CONFIG_BUILTIN_DTB_NAME="simple-smp"
CONFIG_SMP=y
CONFIG_HZ_100=y
CONFIG_OPENRISC_HAVE_SHADOW_GPRS=y
--
2.51.0