[PATCH v3 0/2] Introduce Metanoia MT2824 SoC support

[PATCH v3 0/2] Introduce Metanoia MT2824 SoC support

[Benoît Monin]

This series add support for the Metanoia MT2824 SoC. The MT2824 is
a highly integrated 5G System-on-Chip aimed at O‑RAN Radio Units
and small cells. This SoC is used in conjunction with two MT3812 5G
transceivers to form the MT5824 reference design[1].
The MT2824 features:
* CPU: Two AndesCore AX45MP RISC-V 64 cores
* DSP/PHY: Dedicated DSP cores and digital front-end for PHY processing
* Memory: LPDDR4 support with inline ECC
* Ethernet: Dual 10G/25G SerDes
* SPI: One Quad-SPI and 8 SPI controllers
* 3 I2C controllers
* SD/MMC controller
* 3 UARTs
* Hardware watchdog
* 32 GPIOs
* USB host controller

[1]: https://metanoia-comm.com/products/5g/mt5824/

Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>
---
Changes in v3:
- Rebased on v1.9.
- Change the system_reset device name to "metanoia-mt2824-reboot" to
  match the DT compatible "metanoia,mt2824-reboot" and avoid confusion
  with "metanoia,mt2824-reset".
- Link to v2: https://patch.msgid.link/20260625-mt5824-v2-0-48bd438fc2e5@bootlin.com

Changes in v2:
- Fix the SoC name (MT2824) and clarify the reference design name (MT5824)
- Link to v1: https://patch.msgid.link/20260618-mt5824-v1-0-c99263cc6df4@bootlin.com

---
Benoît Monin (2):
      platform: generic: Add Metanoia MT2824 initial support
      lib: utils/reset: Add Metanoia MT2824 system reset driver

 docs/platform/generic.md                    |   2 +
 docs/platform/metanoia-mt2824.md            | 147 ++++++++++++++++++++++++++++
 lib/utils/reset/Kconfig                     |   4 +
 lib/utils/reset/fdt_reset_metanoia.c        |  72 ++++++++++++++
 lib/utils/reset/objects.mk                  |   3 +
 platform/generic/Kconfig                    |   7 ++
 platform/generic/configs/defconfig          |   2 +
 platform/generic/metanoia/mt2824/mt2824.c   |  31 ++++++
 platform/generic/metanoia/mt2824/objects.mk |  10 ++
 9 files changed, 278 insertions(+)
---
base-commit: cbf9f6734dd85a982c63e3cb5db7ffe09da839ca
change-id: 20260525-mt5824-5790818fb75f

Best regards,
--  
Benoît Monin, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com


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[PATCH v3 1/2] platform: generic: Add Metanoia MT2824 initial support

[Benoît Monin]

Add the Metanoia MT2824 as a generic platform. This SoC contains two
AX45MP cores from Andes Technology and uses Andes PMU and vendor-specific
extensions.

Originally-by: Jun Chang <jun.chang@metanoia-comm.com>
Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>
---
 docs/platform/generic.md                    |   2 +
 docs/platform/metanoia-mt2824.md            | 147 ++++++++++++++++++++++++++++
 platform/generic/Kconfig                    |   7 ++
 platform/generic/configs/defconfig          |   1 +
 platform/generic/metanoia/mt2824/mt2824.c   |  31 ++++++
 platform/generic/metanoia/mt2824/objects.mk |  10 ++
 6 files changed, 198 insertions(+)

diff --git a/docs/platform/generic.md b/docs/platform/generic.md
index 0b896ede..760152a0 100644
--- a/docs/platform/generic.md
+++ b/docs/platform/generic.md
@@ -50,6 +50,7 @@ RISC-V Platforms Using Generic Platform
 * **Tenstorrent Atlantis Platform** (*[tt-atlantis.md]*)
 * **OpenPiton FPGA SoC** (*[fpga-openpiton.md]*)
 * **Ariane FPGA SoC** (*[fpga-ariane.md]*)
+* **Metanoia MT2824 SoC** (*[metanoia-mt2824.md]*)
 
 [andes-ae350.md]: andes-ae350.md
 [qemu_virt.md]: qemu_virt.md
@@ -61,3 +62,4 @@ RISC-V Platforms Using Generic Platform
 [tt-atlantis.md]: tt-atlantis.md
 [fpga-openpiton.md]: fpga-openpiton.md
 [fpga-ariane.md]: fpga-ariane.md
+[metanoia-mt2824.md]: metanoia-mt2824.md
diff --git a/docs/platform/metanoia-mt2824.md b/docs/platform/metanoia-mt2824.md
new file mode 100644
index 00000000..83017df5
--- /dev/null
+++ b/docs/platform/metanoia-mt2824.md
@@ -0,0 +1,147 @@
+Metanoia MT2824 SoC Platform
+============================
+The Metanoia MT2824 is a highly integrated 5G System-on-Chip designed
+for O-RAN radio units and small cells. It features two Andes AX45MP
+RISC-V cores. More details about the SoC and its reference platform
+named MT5824 can be found at the following [link][0].
+
+To build platform specific library and firmwares, provide the
+*PLATFORM=generic* parameter to the top level make command.
+
+[0]: https://metanoia-comm.com/products/5g/mt5824/
+
+Platform Options
+----------------
+
+The Metanoia MT2824 platform does not have any platform-specific options.
+
+Building Metanoia MT2824 Platform
+---------------------------------
+
+```
+make PLATFORM=generic
+```
+
+DTS Example: (Metanoia MT2824)
+------------------------------
+
+```
+	compatible = "metanoia,mt2824";
+
+	cpus: cpus {
+		#address-cells = <0x01>;
+		#size-cells = <0x00>;
+		timebase-frequency = <20000000>;
+
+		cpu0: cpu@0 {
+			device_type = "cpu";
+			reg = <0x00>;
+			status = "okay";
+			compatible = "andestech,ax45mp", "riscv";
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+					       "zicntr", "zicsr", "zifencei",
+					       "zihpm", "xandespmu";
+			mmu-type = "riscv,sv39";
+			clock-frequency = <900000000>;
+			i-cache-size = <0x8000>;
+			i-cache-sets = <0x100>;
+			i-cache-line-size = <0x40>;
+			i-cache-block-size = <0x40>;
+			d-cache-size = <0x8000>;
+			d-cache-sets = <0x80>;
+			d-cache-line-size = <0x40>;
+			d-cache-block-size = <0x40>;
+			next-level-cache = <0x01>;
+
+			cpu0intc: interrupt-controller {
+				#interrupt-cells = <0x01>;
+				interrupt-controller;
+				compatible = "andestech,cpu-intc", "riscv,cpu-intc";
+			};
+		};
+
+		cpu1: cpu@1 {
+			device_type = "cpu";
+			reg = <0x01>;
+			status = "okay";
+			compatible = "andestech,ax45mp", "riscv";
+			riscv,isa-base = "rv64i";
+			riscv,isa-extensions = "i", "m", "a", "f", "d", "c",
+					       "zicntr", "zicsr", "zifencei",
+					       "zihpm", "xandespmu";
+			mmu-type = "riscv,sv39";
+			clock-frequency = <900000000>;
+			i-cache-size = <0x8000>;
+			i-cache-sets = <0x100>;
+			i-cache-line-size = <0x40>;
+			i-cache-block-size = <0x40>;
+			d-cache-size = <0x8000>;
+			d-cache-sets = <0x80>;
+			d-cache-line-size = <0x40>;
+			d-cache-block-size = <0x40>;
+			next-level-cache = <0x01>;
+
+			cpu1intc: interrupt-controller {
+				#interrupt-cells = <0x01>;
+				interrupt-controller;
+				compatible = "andestech,cpu-intc", "riscv,cpu-intc";
+			};
+		};
+	};
+
+	l2c: l2-cache@a000000 {
+		compatible = "andestech,ax45mp-cache", "cache";
+		reg = <0x00 0xa000000 0x00 0x40000>;
+		cache-line-size = <64>;
+		cache-level = <2>;
+		cache-size = <0x40000>;
+		cache-sets = <1024>;
+		cache-unified;
+		interrupts = <1 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-parent = <&plic>;
+	};
+
+	soc: soc {
+		#address-cells = <0x02>;
+		#size-cells = <0x02>;
+		compatible = "simple-bus";
+		interrupt-parent = <&plic>;
+		ranges;
+
+		plic: interrupt-controller@c000000 {
+			compatible = "metanoia,mt2824-plic", "andestech,nceplic100";
+			reg = <0x0 0x0c000000 0x0 0x400000>;
+			interrupts-extended =
+				<&cpu0intc 0x0b>,
+				<&cpu0intc 0x09>,
+				<&cpu1intc 0x0b>,
+				<&cpu1intc 0x09>;
+			interrupt-controller;
+			#address-cells = <0x00>;
+			#interrupt-cells = <0x02>;
+			riscv,ndev = <0x47>;
+		};
+
+		plicsw: interrupt-controller@c800000 {
+			compatible = "metanoia,mt2824-plicsw", "andestech,plicsw";
+			reg = <0x00 0x0c800000 0x00 0x400000>;
+			interrupts-extended =
+				<&cpu0intc IRQ_TYPE_EDGE_BOTH>,
+				<&cpu1intc IRQ_TYPE_EDGE_BOTH>;
+		};
+
+		plmt0@c400000 {
+			compatible = "metanoia,mt2824-plmt", "andestech,plmt0";
+			reg = <0x0 0x0c400000 0x0 0x00400000>;
+			interrupts-extended =
+				<&cpu0intc 0x07>,
+				<&cpu1intc 0x07>;
+		};
+
+		reboot: reboot@10000004 {
+			compatible = "metanoia,mt2824-reboot";
+			reg = <0x0 0x10000004 0x0 0x08>;
+		};
+	};
+```
diff --git a/platform/generic/Kconfig b/platform/generic/Kconfig
index d594b140..64fc4a64 100644
--- a/platform/generic/Kconfig
+++ b/platform/generic/Kconfig
@@ -51,6 +51,13 @@ config PLATFORM_ESWIN_EIC770X
 	bool "ESWIN EIC770X support"
 	default n
 
+config PLATFORM_METANOIA_MT2824
+	bool "Metanoia MT2824 support"
+	select ANDES_PMA
+	select ANDES_SBI
+	select ANDES_PMU
+	default n
+
 config PLATFORM_OPENHWGROUP_OPENPITON
 	bool "OpenHWGroup Openpiton support"
 	default n
diff --git a/platform/generic/configs/defconfig b/platform/generic/configs/defconfig
index 969639e3..820c98b6 100644
--- a/platform/generic/configs/defconfig
+++ b/platform/generic/configs/defconfig
@@ -2,6 +2,7 @@ CONFIG_PLATFORM_ALLWINNER_D1=y
 CONFIG_PLATFORM_ANDES_AE350=y
 CONFIG_PLATFORM_ANDES_QILAI=y
 CONFIG_PLATFORM_ESWIN_EIC770X=y
+CONFIG_PLATFORM_METANOIA_MT2824=y
 CONFIG_PLATFORM_OPENHWGROUP_ARIANE=y
 CONFIG_PLATFORM_OPENHWGROUP_OPENPITON=y
 CONFIG_PLATFORM_RENESAS_RZFIVE=y
diff --git a/platform/generic/metanoia/mt2824/mt2824.c b/platform/generic/metanoia/mt2824/mt2824.c
new file mode 100644
index 00000000..a34304b9
--- /dev/null
+++ b/platform/generic/metanoia/mt2824/mt2824.c
@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Copyright (C) 2026 Metanoia Communication Inc.
+ *
+ * Authors:
+ *      Jun Chang <jun.chang@metanoia-comm.com>
+ */
+
+#include <andes/andes_pmu.h>
+#include <andes/andes_sbi.h>
+#include <platform_override.h>
+
+static int metanoia_mt2824_platform_init(const void *fdt, int nodeoff,
+					const struct fdt_match *match)
+{
+	generic_platform_ops.extensions_init = andes_pmu_extensions_init;
+	generic_platform_ops.pmu_init = andes_pmu_init;
+	generic_platform_ops.vendor_ext_provider = andes_sbi_vendor_ext_provider;
+
+	return 0;
+}
+
+static const struct fdt_match metanoia_mt2824_match[] = {
+	{ .compatible = "metanoia,mt2824" },
+	{ /* sentinel */ }
+};
+
+const struct fdt_driver metanoia_mt2824 = {
+	.match_table = metanoia_mt2824_match,
+	.init = metanoia_mt2824_platform_init,
+};
diff --git a/platform/generic/metanoia/mt2824/objects.mk b/platform/generic/metanoia/mt2824/objects.mk
new file mode 100644
index 00000000..b97c7775
--- /dev/null
+++ b/platform/generic/metanoia/mt2824/objects.mk
@@ -0,0 +1,10 @@
+#
+# SPDX-License-Identifier: BSD-2-Clause
+#
+# Copyright (C) 2026 Metanoia Communication Inc.
+#
+
+ifeq ($(PLATFORM_RISCV_XLEN), 64)
+carray-platform_override_modules-$(CONFIG_PLATFORM_METANOIA_MT2824) += metanoia_mt2824
+platform-objs-$(CONFIG_PLATFORM_METANOIA_MT2824) += metanoia/mt2824/mt2824.o
+endif

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[PATCH v3 2/2] lib: utils/reset: Add Metanoia MT2824 system reset driver

[Benoît Monin]

Add a driver for the system reset function found in Metanoia MT2824 SoC
and enable it in the generic platform configuration.

Originally-by: Jun Chang <jun.chang@metanoia-comm.com>
Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>
---
 lib/utils/reset/Kconfig              |  4 ++
 lib/utils/reset/fdt_reset_metanoia.c | 72 ++++++++++++++++++++++++++++++++++++
 lib/utils/reset/objects.mk           |  3 ++
 platform/generic/configs/defconfig   |  1 +
 4 files changed, 80 insertions(+)

diff --git a/lib/utils/reset/Kconfig b/lib/utils/reset/Kconfig
index b2ac120e..8988548c 100644
--- a/lib/utils/reset/Kconfig
+++ b/lib/utils/reset/Kconfig
@@ -29,6 +29,10 @@ config FDT_RESET_LITEX
 	depends on FDT_GPIO
 	default n
 
+config FDT_RESET_METANOIA
+	bool "Metanoia FDT reset driver"
+	default n
+
 config FDT_RESET_RPMI
 	bool "RPMI FDT reset driver"
 	depends on FDT_MAILBOX && RPMI_MAILBOX
diff --git a/lib/utils/reset/fdt_reset_metanoia.c b/lib/utils/reset/fdt_reset_metanoia.c
new file mode 100644
index 00000000..628cd8b6
--- /dev/null
+++ b/lib/utils/reset/fdt_reset_metanoia.c
@@ -0,0 +1,72 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2026 Metanoia Communications Inc.
+ *
+ */
+
+#include <sbi/riscv_io.h>
+#include <sbi/sbi_platform.h>
+#include <sbi/sbi_system.h>
+#include <sbi_utils/fdt/fdt_helper.h>
+#include <sbi_utils/fdt/fdt_driver.h>
+
+#define SWRSTREQ_CTRL_REG_OFFSET 0x00
+#define SWRSTREQ_REG_OFFSET 0x04
+
+struct reset_metanoia_data {
+	u8 *reg_base;
+};
+
+static struct reset_metanoia_data reset_data;
+
+static int metanoia_system_reset_check(u32 type, u32 reason)
+{
+	switch (type) {
+	case SBI_SRST_RESET_TYPE_WARM_REBOOT:
+	case SBI_SRST_RESET_TYPE_COLD_REBOOT:
+		return 1;
+	case SBI_SRST_RESET_TYPE_SHUTDOWN:
+	default:
+		return 0;
+	}
+}
+
+static void metanoia_system_reset(u32 type, u32 reason)
+{
+	writew(0x1, reset_data.reg_base + SWRSTREQ_CTRL_REG_OFFSET);
+	writew(0x1, reset_data.reg_base + SWRSTREQ_REG_OFFSET);
+}
+
+static struct sbi_system_reset_device metanoia_reset = {
+	.name		    = "metanoia-mt2824-reboot",
+	.system_reset_check = metanoia_system_reset_check,
+	.system_reset	    = metanoia_system_reset,
+};
+
+static int metanoia_reset_init(const void *fdt, int nodeoff,
+			       const struct fdt_match *match)
+{
+	u64 reg_addr;
+	int rc;
+
+	rc = fdt_get_node_addr_size(fdt, nodeoff, 0, &reg_addr, NULL);
+	if (rc < 0 || !reg_addr)
+		return SBI_ENODEV;
+
+	reset_data.reg_base = (u8 *)reg_addr;
+
+	sbi_system_reset_add_device(&metanoia_reset);
+
+	return 0;
+}
+
+static const struct fdt_match metanoia_reset_match[] = {
+	{ .compatible = "metanoia,mt2824-reboot" },
+	{ /* sentinel */ }
+};
+
+const struct fdt_driver fdt_reset_metanoia = {
+	.match_table = metanoia_reset_match,
+	.init	     = metanoia_reset_init,
+};
diff --git a/lib/utils/reset/objects.mk b/lib/utils/reset/objects.mk
index 38b4e306..a9b6edad 100644
--- a/lib/utils/reset/objects.mk
+++ b/lib/utils/reset/objects.mk
@@ -20,6 +20,9 @@ libsbiutils-objs-$(CONFIG_FDT_RESET_HTIF) += reset/fdt_reset_htif.o
 carray-fdt_early_drivers-$(CONFIG_FDT_RESET_LITEX) += fdt_reset_litex
 libsbiutils-objs-$(CONFIG_FDT_RESET_LITEX) += reset/fdt_reset_litex.o
 
+carray-fdt_early_drivers-$(CONFIG_FDT_RESET_METANOIA) += fdt_reset_metanoia
+libsbiutils-objs-$(CONFIG_FDT_RESET_METANOIA) += reset/fdt_reset_metanoia.o
+
 carray-fdt_early_drivers-$(CONFIG_FDT_RESET_SG2042_HWMON_MCU) += fdt_reset_sg2042_mcu
 libsbiutils-objs-$(CONFIG_FDT_RESET_SG2042_HWMON_MCU) += reset/fdt_reset_sg2042_hwmon_mcu.o
 
diff --git a/platform/generic/configs/defconfig b/platform/generic/configs/defconfig
index 820c98b6..ac76eb27 100644
--- a/platform/generic/configs/defconfig
+++ b/platform/generic/configs/defconfig
@@ -52,6 +52,7 @@ CONFIG_FDT_RESET_ATCWDT200=y
 CONFIG_FDT_RESET_GPIO=y
 CONFIG_FDT_RESET_LITEX=y
 CONFIG_FDT_RESET_HTIF=y
+CONFIG_FDT_RESET_METANOIA=y
 CONFIG_FDT_RESET_RPMI=y
 CONFIG_FDT_RESET_SG2042_HWMON_MCU=y
 CONFIG_FDT_RESET_SPACEMIT_P1=y

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Re: [PATCH v3 0/2] Introduce Metanoia MT2824 SoC support

[Benoît Monin]

On Friday, 24 July 2026 at 17:35:06 CEST, Benoît Monin wrote:
> This series add support for the Metanoia MT2824 SoC. The MT2824 is
> a highly integrated 5G System-on-Chip aimed at O‑RAN Radio Units
> and small cells. This SoC is used in conjunction with two MT3812 5G
> transceivers to form the MT5824 reference design[1].
> The MT2824 features:
> * CPU: Two AndesCore AX45MP RISC-V 64 cores
> * DSP/PHY: Dedicated DSP cores and digital front-end for PHY processing
> * Memory: LPDDR4 support with inline ECC
> * Ethernet: Dual 10G/25G SerDes
> * SPI: One Quad-SPI and 8 SPI controllers
> * 3 I2C controllers
> * SD/MMC controller
> * 3 UARTs
> * Hardware watchdog
> * 32 GPIOs
> * USB host controller
> 
> [1]: https://metanoia-comm.com/products/5g/mt5824/
> 
[Adding Anup in CC]

Small ping on this series: Any reviews or comments are welcome.

> Signed-off-by: Benoît Monin <benoit.monin@bootlin.com>
> ---
> Changes in v3:
> - Rebased on v1.9.
> - Change the system_reset device name to "metanoia-mt2824-reboot" to
>   match the DT compatible "metanoia,mt2824-reboot" and avoid confusion
>   with "metanoia,mt2824-reset".
> - Link to v2: https://patch.msgid.link/20260625-mt5824-v2-0-48bd438fc2e5@bootlin.com
> 
> Changes in v2:
> - Fix the SoC name (MT2824) and clarify the reference design name (MT5824)
> - Link to v1: https://patch.msgid.link/20260618-mt5824-v1-0-c99263cc6df4@bootlin.com
> 
> ---
> Benoît Monin (2):
>       platform: generic: Add Metanoia MT2824 initial support
>       lib: utils/reset: Add Metanoia MT2824 system reset driver
> 
>  docs/platform/generic.md                    |   2 +
>  docs/platform/metanoia-mt2824.md            | 147 ++++++++++++++++++++++++++++
>  lib/utils/reset/Kconfig                     |   4 +
>  lib/utils/reset/fdt_reset_metanoia.c        |  72 ++++++++++++++
>  lib/utils/reset/objects.mk                  |   3 +
>  platform/generic/Kconfig                    |   7 ++
>  platform/generic/configs/defconfig          |   2 +
>  platform/generic/metanoia/mt2824/mt2824.c   |  31 ++++++
>  platform/generic/metanoia/mt2824/objects.mk |  10 ++
>  9 files changed, 278 insertions(+)
> ---
> base-commit: cbf9f6734dd85a982c63e3cb5db7ffe09da839ca
> change-id: 20260525-mt5824-5790818fb75f
> 

Best regards,
-- 
Benoît Monin, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com




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