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Message-ID: <20250501044239.9404-6-ziyao@disroot.org>
Date: Thu, 1 May 2025 04:42:40 +0000
From: Yao Zi <ziyao@...root.org>
To: Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Huacai Chen <chenhuacai@...nel.org>,
WANG Xuerui <kernel@...0n.name>,
Yao Zi <ziyao@...root.org>,
Neil Armstrong <neil.armstrong@...aro.org>,
Heiko Stuebner <heiko@...ech.de>,
Junhao Xie <bigfoot@...ssfun.cn>,
Rafał Miłecki <rafal@...ecki.pl>,
Aradhya Bhatia <a-bhatia1@...com>,
Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
Binbin Zhou <zhoubinbin@...ngson.cn>,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
loongarch@...ts.linux.dev,
Mingcong Bai <jeffbai@...c.io>,
Kexy Biscuit <kexybiscuit@...c.io>
Subject: [PATCH 4/4] LoongArch: dts: Add initial devicetree for CTCISZ Ninenine Pi
Enable UART0 as it's the boot UART used by firmware.
Signed-off-by: Yao Zi <ziyao@...root.org>
---
arch/loongarch/boot/dts/Makefile | 1 +
.../boot/dts/ls2k0300-ctcisz-nineninepi.dts | 41 +++++++++++++++++++
2 files changed, 42 insertions(+)
create mode 100644 arch/loongarch/boot/dts/ls2k0300-ctcisz-nineninepi.dts
diff --git a/arch/loongarch/boot/dts/Makefile b/arch/loongarch/boot/dts/Makefile
index 15d5e14fe418..e55df9f385af 100644
--- a/arch/loongarch/boot/dts/Makefile
+++ b/arch/loongarch/boot/dts/Makefile
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
dtb-y = loongson-2k0500-ref.dtb loongson-2k1000-ref.dtb loongson-2k2000-ref.dtb
+dtb-y += ls2k0300-ctcisz-nineninepi.dtb
diff --git a/arch/loongarch/boot/dts/ls2k0300-ctcisz-nineninepi.dts b/arch/loongarch/boot/dts/ls2k0300-ctcisz-nineninepi.dts
new file mode 100644
index 000000000000..a67a8ce4211e
--- /dev/null
+++ b/arch/loongarch/boot/dts/ls2k0300-ctcisz-nineninepi.dts
@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2025 Yao Zi <ziyao@...root.org>
+ */
+
+/dts-v1/;
+
+#include "loongson-2k0300.dtsi"
+
+/ {
+ compatible = "ctcisz,ninenine-pi", "loongson,ls2k0300";
+ model = "CTCISZ Ninenine Pi";
+
+ chosen {
+ stdout-path = "serial0:115200n8";
+ };
+
+ memory@...000 {
+ device_type = "memory";
+ reg = <0 0x00200000 0 0x0ee00000>,
+ <0 0x90000000 0 0x10000000>;
+ };
+
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ linux,cma {
+ compatible = "shared-dma-pool";
+ reusable;
+ size = <0 0x02000000>;
+ linux,cma-default;
+ };
+ };
+};
+
+&uart0 {
+ clock-frequency = <100000000>;
+ status = "okay";
+};
--
2.49.0
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