[PATCH v5 0/4] arm64: Add HPE GSC platform support

[PATCH v5 0/4] arm64: Add HPE GSC platform support

[nick.hawkins]

From: Nick Hawkins <nick.hawkins@hpe.com>

Add initial platform support for the HPE GSC ARM64 BMC SoC.

Changes since v4:
- All patches: Removed duplicate From: field in commit message body

Changes since v3:
- Patch 1: Moved GSC entry before GXP in hpe,gxp.yaml to maintain
  alphabetical ordering by fallback compatible (Krzysztof Kozlowski)
- Patch 2: Added Reviewed-by from Krzysztof Kozlowski
- Patch 3: Changed SPDX in gsc-dl340gen12.dts from GPL-2.0-only to
  GPL-2.0 to be consistent with gsc.dtsi (Krzysztof Kozlowski);
  reordered nodes within soc by ascending unit-address, placing UARTs
  before GIC per DTS coding style (Krzysztof Kozlowski);
  moved interrupt-parent before interrupts in timer and all UART nodes
  per DTS coding style (Krzysztof Kozlowski);
  reordered root-level nodes alphabetically: clock-33333333 before cpus
  before timer per DTS coding style (Krzysztof Kozlowski);
  reordered properties within all nodes to follow DTS coding style:
  compatible, reg first, then remaining alphabetically (Krzysztof
  Kozlowski)
- Patch 4: New patch adding CONFIG_ARCH_HPE=y to arm64 defconfig
  (Krzysztof Kozlowski)

Changes since v2:
- Patch 1: Removed separate ARM64/HPE GSC MAINTAINERS entry; instead
  renamed existing ARM/HPE GXP to ARM/HPE GXP/GSC and added arm64 DTS
  path there (Conor Dooley)
- Patch 2: Replaced menuconfig ARCH_HPE + nested ARCH_HPE_GSC with a
  single config ARCH_HPE; removed extra blank line (Krzysztof Kozlowski)
- Patch 3: Dropped clocks wrapper node, renamed fixed clock to
  clock-33333333; renamed ahb bus node to soc; reordered UART nodes by
  address for DTS coding style; replaced raw interrupt triplets with
  GIC_SPI/IRQ_TYPE_LEVEL_HIGH defines (Krzysztof Kozlowski)

Nick Hawkins (4):
  dt-bindings: arm: hpe,gxp: Add HPE GSC platform compatible
  arm64: Kconfig: Add ARCH_HPE platform
  arm64: dts: hpe: Add HPE GSC SoC and DL340 Gen12 board DTS
  arm64: defconfig: Enable ARCH_HPE

 .../devicetree/bindings/arm/hpe,gxp.yaml      |   7 +-
 MAINTAINERS                                   |   3 +-
 arch/arm64/Kconfig.platforms                  |  11 ++
 arch/arm64/boot/dts/hpe/Makefile              |   2 +
 arch/arm64/boot/dts/hpe/gsc-dl340gen12.dts    |  18 +++
 arch/arm64/boot/dts/hpe/gsc.dtsi              | 104 ++++++++++++++++++
 arch/arm64/configs/defconfig                  |   1 +
 7 files changed, 144 insertions(+), 2 deletions(-)
 create mode 100644 arch/arm64/boot/dts/hpe/Makefile
 create mode 100644 arch/arm64/boot/dts/hpe/gsc-dl340gen12.dts
 create mode 100644 arch/arm64/boot/dts/hpe/gsc.dtsi

-- 
2.34.1

[PATCH v5 1/4] dt-bindings: arm: hpe,gxp: Add HPE GSC platform compatible

[nick.hawkins]

From: Nick Hawkins <nick.hawkins@hpe.com>

Add the HPE GSC ARM64 BMC SoC compatibles to the existing
hpe,gxp.yaml binding.

The initial board compatible is hpe,gsc-dl340gen12 for the DL340 Gen12
server platform.

Add the arm64 DTS path to the existing ARM/HPE GXP MAINTAINERS entry,
renamed to ARM/HPE GXP/GSC ARCHITECTURE.

Signed-off-by: Nick Hawkins <nick.hawkins@hpe.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
---
 Documentation/devicetree/bindings/arm/hpe,gxp.yaml | 7 ++++++-
 MAINTAINERS                                        | 3 ++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/hpe,gxp.yaml b/Documentation/devicetree/bindings/arm/hpe,gxp.yaml
index 224bbcb93f95..6f057cd58571 100644
--- a/Documentation/devicetree/bindings/arm/hpe,gxp.yaml
+++ b/Documentation/devicetree/bindings/arm/hpe,gxp.yaml
@@ -4,7 +4,7 @@
 $id: http://devicetree.org/schemas/arm/hpe,gxp.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
-title: HPE BMC GXP platforms
+title: HPE BMC GXP and GSC platforms
 
 maintainers:
   - Nick Hawkins <nick.hawkins@hpe.com>
 @@ -15,6 +15,11 @@ properties:
     oneOf:
+      - description: GSC Based Boards
+        items:
+          - enum:
+              - hpe,gsc-dl340gen12
+          - const: hpe,gsc
       - description: GXP Based Boards
         items:
           - enum:
               - hpe,gxp-dl360gen10
           - const: hpe,gxp
 
 required:
   - compatible
diff --git a/MAINTAINERS b/MAINTAINERS
index 2265e2c9bfbe..80c66de5e342 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -2859,7 +2859,7 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/kristoffer/linux-hpc.git
 F:	arch/arm/mach-sa1100/include/mach/jornada720.h
 F:	arch/arm/mach-sa1100/jornada720.c
 
-ARM/HPE GXP ARCHITECTURE
+ARM/HPE GXP/GSC ARCHITECTURE
 M:	Jean-Marie Verdun <verdun@hpe.com>
 M:	Nick Hawkins <nick.hawkins@hpe.com>
 S:	Maintained
@@ -2870,6 +2870,7 @@ F:	Documentation/devicetree/bindings/spi/hpe,gxp-spifi.yaml
 F:	Documentation/devicetree/bindings/timer/hpe,gxp-timer.yaml
 F:	Documentation/hwmon/gxp-fan-ctrl.rst
 F:	arch/arm/boot/dts/hpe/
+F:	arch/arm64/boot/dts/hpe/
 F:	drivers/clocksource/timer-gxp.c
 F:	drivers/hwmon/gxp-fan-ctrl.c
 F:	drivers/i2c/busses/i2c-gxp.c
-- 
2.34.1

[PATCH v5 2/4] arm64: Kconfig: Add ARCH_HPE platform

[nick.hawkins]

From: Nick Hawkins <nick.hawkins@hpe.com>

Add the ARCH_HPE config for HPE ARM64 BMC SoCs to Kconfig.platforms.

Signed-off-by: Nick Hawkins <nick.hawkins@hpe.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
---
 arch/arm64/Kconfig.platforms | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/arch/arm64/Kconfig.platforms b/arch/arm64/Kconfig.platforms
index 54eb1d7fd419..b4217809c774 100644
--- a/arch/arm64/Kconfig.platforms
+++ b/arch/arm64/Kconfig.platforms
@@ -168,6 +168,17 @@ config ARCH_HISI
 	help
 	  This enables support for Hisilicon ARMv8 SoC family
 
+config ARCH_HPE
+	bool "HPE SoC Support"
+	select PINCTRL
+	select GENERIC_IRQ_CHIP
+	select CLKSRC_MMIO
+	help
+	  This enables support for HPE ARM-based SoC chips used
+	  on HPE servers. HPE SoCs serve as the Baseboard
+	  Management Controller (BMC) providing out-of-band server
+	  management.
+
 config ARCH_KEEMBAY
 	bool "Keem Bay SoC"
 	help
-- 
2.34.1

[PATCH v5 3/4] arm64: dts: hpe: Add HPE GSC SoC and DL340 Gen12 board DTS

[nick.hawkins]

From: Nick Hawkins <nick.hawkins@hpe.com>

Add SoC-level DTSI for the HPE GSC ARM64 BMC SoC, covering the CPU
cluster, GIC v3 interrupt controller, ARM64 generic timer, and console
UART.

Add the board-level DTS for the HPE DL340 Gen12, which includes
gsc.dtsi and adds memory and chosen nodes.

Signed-off-by: Nick Hawkins <nick.hawkins@hpe.com>
---
 arch/arm64/boot/dts/hpe/Makefile           |   2 +
 arch/arm64/boot/dts/hpe/gsc-dl340gen12.dts |  18 ++++
 arch/arm64/boot/dts/hpe/gsc.dtsi           | 104 +++++++++++++++++++++
 3 files changed, 124 insertions(+)
 create mode 100644 arch/arm64/boot/dts/hpe/Makefile
 create mode 100644 arch/arm64/boot/dts/hpe/gsc-dl340gen12.dts
 create mode 100644 arch/arm64/boot/dts/hpe/gsc.dtsi

diff --git a/arch/arm64/boot/dts/hpe/Makefile b/arch/arm64/boot/dts/hpe/Makefile
new file mode 100644
index 000000000000..6b547b8a8154
--- /dev/null
+++ b/arch/arm64/boot/dts/hpe/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
+dtb-$(CONFIG_ARCH_HPE) += gsc-dl340gen12.dtb
diff --git a/arch/arm64/boot/dts/hpe/gsc-dl340gen12.dts b/arch/arm64/boot/dts/hpe/gsc-dl340gen12.dts
new file mode 100644
index 000000000000..7a3d9f1c4b2e
--- /dev/null
+++ b/arch/arm64/boot/dts/hpe/gsc-dl340gen12.dts
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-2.0
+/dts-v1/;
+
+#include "gsc.dtsi"
+
+/ {
+	compatible = "hpe,gsc-dl340gen12", "hpe,gsc";
+	model = "HPE ProLiant DL340 Gen12";
+
+	chosen {
+		stdout-path = &uartc;
+	};
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x00000000 0x40000000>;
+	};
+};
diff --git a/arch/arm64/boot/dts/hpe/gsc.dtsi b/arch/arm64/boot/dts/hpe/gsc.dtsi
new file mode 100644
index 000000000000..1f4c2a7b3d91
--- /dev/null
+++ b/arch/arm64/boot/dts/hpe/gsc.dtsi
@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Device Tree file for HPE GSC
+ */
+
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+	#address-cells = <1>;
+	#size-cells = <1>;
+
+	osc: clock-33333333 {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-output-names = "osc";
+		clock-frequency = <33333333>;
+	};
+
+	cpus {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53";
+			reg = <0>;
+			enable-method = "spin-table";
+			cpu-release-addr = <0 0xa0008048>;
+		};
+
+		cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53";
+			reg = <1>;
+			enable-method = "spin-table";
+			cpu-release-addr = <0 0xa0008048>;
+		};
+	};
+
+	timer {
+		compatible = "arm,armv8-timer";
+		interrupt-parent = <&gic>;
+		interrupts = <GIC_PPI 13 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_PPI 14 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_PPI 11 IRQ_TYPE_LEVEL_LOW>,
+			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>;
+	};
+
+	soc: soc@80000000 {
+		compatible = "simple-bus";
+		reg = <0x80000000 0x80000000>;
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges;
+
+		uarta: serial@c00000e0 {
+			compatible = "ns16550a";
+			reg = <0xc00000e0 0x8>;
+			clock-frequency = <1846153>;
+			interrupt-parent = <&gic>;
+			interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
+			reg-shift = <0>;
+		};
+
+		uartb: serial@c00000e8 {
+			compatible = "ns16550a";
+			reg = <0xc00000e8 0x8>;
+			clock-frequency = <1846153>;
+			interrupt-parent = <&gic>;
+			interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
+			reg-shift = <0>;
+		};
+
+		uartc: serial@c00000f0 {
+			compatible = "ns16550a";
+			reg = <0xc00000f0 0x8>;
+			clock-frequency = <1846153>;
+			interrupt-parent = <&gic>;
+			interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
+			reg-shift = <0>;
+		};
+
+		uarte: serial@c00003e0 {
+			compatible = "ns16550a";
+			reg = <0xc00003e0 0x8>;
+			clock-frequency = <1846153>;
+			interrupt-parent = <&gic>;
+			interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
+			reg-shift = <0>;
+		};
+
+		gic: gic@ce000000 {
+			compatible = "arm,gic-v3";
+			reg = <0xce000000 0x10000>,
+			      <0xce060000 0x40000>,
+			      <0xce200000 0x40000>;
+			#address-cells = <0>;
+			#interrupt-cells = <3>;
+			#redistributor-regions = <1>;
+			interrupt-controller;
+			redistributor-stride = <0x0 0x20000>;
+		};
+	};
+};
-- 
2.34.1

Re: [PATCH v5 3/4] arm64: dts: hpe: Add HPE GSC SoC and DL340 Gen12 board DTS

[Krzysztof Kozlowski]

On Fri, Apr 10, 2026 at 05:16:10PM +0000, nick.hawkins@hpe.com wrote:
> +		uarte: serial@c00003e0 {
> +			compatible = "ns16550a";
> +			reg = <0xc00003e0 0x8>;
> +			clock-frequency = <1846153>;
> +			interrupt-parent = <&gic>;
> +			interrupts = <GIC_SPI 12 IRQ_TYPE_LEVEL_HIGH>;
> +			reg-shift = <0>;
> +		};
> +
> +		gic: gic@ce000000 {

Nodename should be interrupt-controller@

With this fixed:

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>

Best regards,
Krzysztof

[PATCH v5 4/4] arm64: defconfig: Enable ARCH_HPE

[nick.hawkins]

From: Nick Hawkins <nick.hawkins@hpe.com>

Enable ARCH_HPE in the arm64 defconfig to include HPE GSC BMC SoC
support in the default build.

Signed-off-by: Nick Hawkins <nick.hawkins@hpe.com>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index xxxxxxxxxxxxxxx..xxxxxxxxxxxxxxx 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -xx,6 +xx,7 @@
 CONFIG_ARCH_HISI=y
+CONFIG_ARCH_HPE=y
 CONFIG_ARCH_KEEMBAY=y
-- 
2.34.1

Re: [PATCH v5 4/4] arm64: defconfig: Enable ARCH_HPE

[Krzysztof Kozlowski]

On Fri, Apr 10, 2026 at 05:16:11PM +0000, nick.hawkins@hpe.com wrote:
> From: Nick Hawkins <nick.hawkins@hpe.com>
> 
> Enable ARCH_HPE in the arm64 defconfig to include HPE GSC BMC SoC
> support in the default build.
> 
> Signed-off-by: Nick Hawkins <nick.hawkins@hpe.com>
> ---
>  arch/arm64/configs/defconfig | 1 +
>  1 file changed, 1 insertion(+)

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>

Best regards,
Krzysztof