linux-kernel - [PATCH v2 4/5] openrisc: dts: Split simple smp dts to dts and dtsi

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Message-ID: <20251217080843.70621-5-shorne@gmail.com>
Date: Wed, 17 Dec 2025 08:08:30 +0000
From: Stafford Horne <shorne@...il.com>
To: LKML <linux-kernel@...r.kernel.org>
Cc: Linux OpenRISC <linux-openrisc@...r.kernel.org>,
	Stafford Horne <shorne@...il.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Jonas Bonn <jonas@...thpole.se>,
	Stefan Kristiansson <stefan.kristiansson@...nalahti.fi>,
	Masahiro Yamada <masahiroy@...nel.org>,
	devicetree@...r.kernel.org
Subject: [PATCH v2 4/5] openrisc: dts: Split simple smp dts to dts and dtsi

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@...il.com>
---
Since v1:
  - Removed clock-frequency 0 in dtsi file.
  - Fix DTB name in defconfig file

 arch/openrisc/boot/dts/simple-smp.dts         | 25 +++++++++++++++++++
 .../dts/{simple_smp.dts => simple-smp.dtsi}   |  9 +++----
 arch/openrisc/configs/simple_smp_defconfig    |  2 +-
 3 files changed, 29 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..26f6a9236b30
--- /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>;
+};
+
+&serial0 {
+	clock-frequency = <20000000>;
+};
+
+&enet0 {
+	status = "okay";
+};
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..2013fd3e7a18 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 +21,13 @@ 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 +54,6 @@ serial0: serial@...00000 {
 		compatible = "opencores,uart16550-rtlsvn105", "ns16550a";
 		reg = <0x90000000 0x100>;
 		interrupts = <2>;
-		clock-frequency = <20000000>;
 	};
 
 	enet0: ethoc@...00000 {
@@ -65,5 +61,6 @@ enet0: ethoc@...00000 {
 		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