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[5.147.80.91]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b7ff725efd8sm171981166b.27.2025.12.16.06.33.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 16 Dec 2025 06:33:32 -0800 (PST) Message-ID: <3c38ce9c-4259-4149-bf2c-a54e74c00a34@canonical.com> Date: Tue, 16 Dec 2025 15:33:30 +0100 Precedence: bulk X-Mailing-List: linux-serial@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 8/8] riscv: dts: spacemit: add SpacemiT K3 Pico-ITX board device tree To: Guodong Xu Cc: Paul Walmsley , Palmer Dabbelt , Conor Dooley , Heinrich Schuchardt , Kevin Meng Zhang , devicetree@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, spacemit@lists.linux.dev, linux-serial@vger.kernel.org, Rob Herring , Krzysztof Kozlowski , Conor Dooley , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Yixun Lan , Daniel Lezcano , Thomas Gleixner , Samuel Holland , Anup Patel , Greg Kroah-Hartman , Jiri Slaby , Lubomir Rintel , Yangyu Chen References: <20251216-k3-basic-dt-v1-0-a0d256c9dc92@riscstar.com> <20251216-k3-basic-dt-v1-8-a0d256c9dc92@riscstar.com> Content-Language: en-US From: Heinrich Schuchardt In-Reply-To: <20251216-k3-basic-dt-v1-8-a0d256c9dc92@riscstar.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 12/16/25 14:32, Guodong Xu wrote: > K3 Pico-ITX is a 2.5-inch single-board computer equipted with a SpacemiT > K3 SoC. > > This minimal device tree enables booting into a serial console with UART > output. > > Signed-off-by: Guodong Xu > --- > arch/riscv/boot/dts/spacemit/Makefile | 1 + > arch/riscv/boot/dts/spacemit/k3-pico-itx.dts | 25 +++++++++++++++++++++++++ > 2 files changed, 26 insertions(+) > > diff --git a/arch/riscv/boot/dts/spacemit/Makefile b/arch/riscv/boot/dts/spacemit/Makefile > index 95889e7269d1bae679b28cd053e1b0a23ae6de68..7e2b877025718113a0e31917eadf7562f488d825 100644 > --- a/arch/riscv/boot/dts/spacemit/Makefile > +++ b/arch/riscv/boot/dts/spacemit/Makefile > @@ -4,3 +4,4 @@ dtb-$(CONFIG_ARCH_SPACEMIT) += k1-milkv-jupiter.dtb > dtb-$(CONFIG_ARCH_SPACEMIT) += k1-musepi-pro.dtb > dtb-$(CONFIG_ARCH_SPACEMIT) += k1-orangepi-r2s.dtb > dtb-$(CONFIG_ARCH_SPACEMIT) += k1-orangepi-rv2.dtb > +dtb-$(CONFIG_ARCH_SPACEMIT) += k3-pico-itx.dtb > diff --git a/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts > new file mode 100644 > index 0000000000000000000000000000000000000000..0f9d04dd352f5331e82599285113b86af5b09ebe > --- /dev/null > +++ b/arch/riscv/boot/dts/spacemit/k3-pico-itx.dts > @@ -0,0 +1,25 @@ > +// SPDX-License-Identifier: (GPL-2.0 OR MIT) > +/* > + * Copyright (c) 2025 SpacemiT (Hangzhou) Technology Co. Ltd > + * Copyright (c) 2025 Guodong Xu > + */ > + > +#include "k3.dtsi" > + > +/ { > + model = "SpacemiT K3 Pico-ITX"; > + compatible = "spacemit,k3-pico-itx", "spacemit,k3"; > + > + chosen { > + stdout-path = "serial0"; > + }; > + > + memory@100200000 { > + device_type = "memory"; > + reg = <0x1 0x00200000 0x3 0xffe00000>; Shouldn't the reserved memory be described as no-map /reserved-memory nodes instead? I would assume that 0x1,0000,0000 is the location of OpenSBI. What is at 0x3,ffe0,0000? Best regards Heinrich > + }; > +}; > + > +&uart0 { > + status = "okay"; > +}; >