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[94.175.9.129]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47edfd5cfd5sm20913665e9.8.2026.01.13.08.15.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Jan 2026 08:15:35 -0800 (PST) From: Stafford Horne To: LKML Cc: Linux OpenRISC , devicetree , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Stafford Horne , Jonas Bonn , Stefan Kristiansson Subject: [PATCH v4 6/6] openrisc: dts: Add de0 nano multicore config and devicetree Date: Tue, 13 Jan 2026 16:11:39 +0000 Message-ID: <20260113161152.3688309-7-shorne@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260113161152.3688309-1-shorne@gmail.com> References: <20260113161152.3688309-1-shorne@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a multicore configuration for the Terasic de0 nano FPGA development board. This SoC runs 2 OpenRISC CPUs at 50Mhz with 32MB ram, UART for console and GPIOs for LEDs. This FPGA SoC is based on the simple-smp reference board and brings in devices from the de0 nano common DTSI file. A default config is added that brings together the device tree and driver setup. Link: https://github.com/stffrdhrn/de0_nano-multicore Signed-off-by: Stafford Horne --- arch/openrisc/boot/dts/de0-nano-multicore.dts | 25 +++++ .../configs/de0_nano_multicore_defconfig | 92 +++++++++++++++++++ 2 files changed, 117 insertions(+) create mode 100644 arch/openrisc/boot/dts/de0-nano-multicore.dts create mode 100644 arch/openrisc/configs/de0_nano_multicore_defconfig diff --git a/arch/openrisc/boot/dts/de0-nano-multicore.dts b/arch/openrisc/= boot/dts/de0-nano-multicore.dts new file mode 100644 index 000000000000..b6cf286afaa4 --- /dev/null +++ b/arch/openrisc/boot/dts/de0-nano-multicore.dts @@ -0,0 +1,25 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include + +/dts-v1/; + +#include "simple-smp.dtsi" +#include "de0-nano-common.dtsi" + +/ { + model =3D "Terasic DE0 Nano - Multicore"; +}; + +&cpu0 { + clock-frequency =3D <50000000>; +}; + +&cpu1 { + clock-frequency =3D <50000000>; +}; + +&serial0 { + clock-frequency =3D <50000000>; +}; diff --git a/arch/openrisc/configs/de0_nano_multicore_defconfig b/arch/open= risc/configs/de0_nano_multicore_defconfig new file mode 100644 index 000000000000..d33b1226e09c --- /dev/null +++ b/arch/openrisc/configs/de0_nano_multicore_defconfig @@ -0,0 +1,92 @@ +CONFIG_LOCALVERSION=3D"-de0nano-smp" +CONFIG_SYSVIPC=3Dy +CONFIG_POSIX_MQUEUE=3Dy +CONFIG_NO_HZ=3Dy +CONFIG_LOG_BUF_SHIFT=3D14 +CONFIG_BLK_DEV_INITRD=3Dy +# CONFIG_RD_GZIP is not set +# CONFIG_RD_BZIP2 is not set +# CONFIG_RD_LZMA is not set +# CONFIG_RD_XZ is not set +# CONFIG_RD_LZO is not set +# CONFIG_RD_LZ4 is not set +CONFIG_EXPERT=3Dy +# CONFIG_EPOLL is not set +# CONFIG_TIMERFD is not set +# CONFIG_EVENTFD is not set +# CONFIG_AIO is not set +CONFIG_KALLSYMS_ALL=3Dy +CONFIG_DCACHE_WRITETHROUGH=3Dy +CONFIG_BUILTIN_DTB_NAME=3D"de0-nano-multicore" +CONFIG_OPENRISC_HAVE_INST_CMOV=3Dy +CONFIG_SMP=3Dy +CONFIG_HZ_100=3Dy +CONFIG_JUMP_LABEL=3Dy +# CONFIG_BLOCK is not set +CONFIG_SLUB_TINY=3Dy +# CONFIG_COMPAT_BRK is not set +# CONFIG_VM_EVENT_COUNTERS is not set +CONFIG_NET=3Dy +CONFIG_PACKET=3Dy +CONFIG_UNIX=3Dy +CONFIG_UNIX_DIAG=3Dy +CONFIG_INET=3Dy +CONFIG_IP_MULTICAST=3Dy +CONFIG_TCP_CONG_ADVANCED=3Dy +# CONFIG_TCP_CONG_BIC is not set +# CONFIG_TCP_CONG_CUBIC is not set +# CONFIG_TCP_CONG_WESTWOOD is not set +# CONFIG_TCP_CONG_HTCP is not set +# CONFIG_IPV6 is not set +# CONFIG_WIRELESS is not set +CONFIG_DEVTMPFS=3Dy +CONFIG_DEVTMPFS_MOUNT=3Dy +# CONFIG_PREVENT_FIRMWARE_BUILD is not set +# CONFIG_FW_LOADER is not set +CONFIG_NETDEVICES=3Dy +CONFIG_ETHOC=3Dy +CONFIG_MICREL_PHY=3Dy +# CONFIG_WLAN is not set +# CONFIG_INPUT is not set +# CONFIG_SERIO is not set +# CONFIG_VT is not set +# CONFIG_LEGACY_PTYS is not set +CONFIG_SERIAL_8250=3Dy +CONFIG_SERIAL_8250_CONSOLE=3Dy +CONFIG_SERIAL_OF_PLATFORM=3Dy +# CONFIG_HW_RANDOM is not set +CONFIG_GPIO_SYSFS=3Dy +# CONFIG_GPIO_CDEV_V1 is not set +CONFIG_GPIO_GENERIC_PLATFORM=3Dy +# CONFIG_HWMON is not set +# CONFIG_USB_SUPPORT is not set +CONFIG_NEW_LEDS=3Dy +CONFIG_LEDS_CLASS=3Dy +CONFIG_LEDS_GPIO=3Dy +CONFIG_LEDS_TRIGGERS=3Dy +CONFIG_LEDS_TRIGGER_TIMER=3Dy +CONFIG_LEDS_TRIGGER_ONESHOT=3Dy +CONFIG_LEDS_TRIGGER_HEARTBEAT=3Dy +CONFIG_LEDS_TRIGGER_CPU=3Dy +CONFIG_LEDS_TRIGGER_ACTIVITY=3Dy +CONFIG_LEDS_TRIGGER_GPIO=3Dy +CONFIG_LEDS_TRIGGER_DEFAULT_ON=3Dy +CONFIG_LEDS_TRIGGER_TRANSIENT=3Dy +CONFIG_LEDS_TRIGGER_PANIC=3Dy +CONFIG_LEDS_TRIGGER_NETDEV=3Dy +CONFIG_LEDS_TRIGGER_PATTERN=3Dy +CONFIG_LEDS_TRIGGER_TTY=3Dy +# CONFIG_DNOTIFY is not set +CONFIG_TMPFS=3Dy +CONFIG_NFS_FS=3Dy +CONFIG_XZ_DEC=3Dy +CONFIG_PRINTK_TIME=3Dy +CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=3Dy +CONFIG_GDB_SCRIPTS=3Dy +CONFIG_VMLINUX_MAP=3Dy +CONFIG_HARDLOCKUP_DETECTOR=3Dy +CONFIG_WQ_WATCHDOG=3Dy +CONFIG_WQ_CPU_INTENSIVE_REPORT=3Dy +CONFIG_STACKTRACE=3Dy +CONFIG_RCU_CPU_STALL_CPUTIME=3Dy +# CONFIG_RCU_TRACE is not set --=20 2.51.0