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Message-ID: <CAMpQs4L7U=Mkw=pburiUpJLEm=tHeMOW+6PRhWPTMnOGHxFqyA@mail.gmail.com>
Date: Mon, 19 May 2025 11:10:16 +0800
From: Binbin Zhou <zhoubb.aaron@...il.com>
To: Yao Zi <ziyao@...root.org>
Cc: 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>, 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: Re: [PATCH v2 3/4] LoongArch: dts: Add initial SoC devicetree for
Loongson 2K0300
Hi Yao:
Thanks for your patch.
On Sun, May 18, 2025 at 4:05 PM Yao Zi <ziyao@...root.org> wrote:
>
> Add SoC devicetree for 2K0300 SoC, which features one LA264 dual-issue
> core and targets embedded market. Only CPU core, legacy interrupt
> controllers and UARTs are defined for now.
>
> Signed-off-by: Yao Zi <ziyao@...root.org>
> ---
> arch/loongarch/boot/dts/loongson-2k0300.dtsi | 184 +++++++++++++++++++
> 1 file changed, 184 insertions(+)
> create mode 100644 arch/loongarch/boot/dts/loongson-2k0300.dtsi
>
> diff --git a/arch/loongarch/boot/dts/loongson-2k0300.dtsi b/arch/loongarch/boot/dts/loongson-2k0300.dtsi
> new file mode 100644
> index 000000000000..17974f793947
> --- /dev/null
> +++ b/arch/loongarch/boot/dts/loongson-2k0300.dtsi
> @@ -0,0 +1,184 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2025 Loongson Technology Corporation Limited
> + * Copyright (C) 2025 Yao Zi <ziyao@...root.org>
> + */
> +
> +/dts-v1/;
> +
> +#include <dt-bindings/interrupt-controller/irq.h>
> +
> +/ {
> + compatible = "loongson,ls2k0300";
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + cpus {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + cpu0: cpu@0 {
> + compatible = "loongson,la264";
> + reg = <0>;
> + device_type = "cpu";
> + clocks = <&cpu_clk>;
> + };
> +
> + };
> +
> + cpuintc: interrupt-controller {
> + compatible = "loongson,cpu-interrupt-controller";
> + interrupt-controller;
> + #interrupt-cells = <1>;
> + };
> +
> + cpu_clk: clock-1000m {
> + compatible = "fixed-clock";
> + clock-frequency = <1000000000>;
> + #clock-cells = <0>;
> + };
> +
> + soc {
I found the following warning while doing dtbs_check, please check again:
DTC [C] arch/loongarch/boot/dts/ls2k0300-ctcisz-forever-pi.dtb
arch/loongarch/boot/dts/loongson-2k0300.dtsi:41.6-183.4: Warning
(unit_address_vs_reg): /soc: node has a reg or ranges property, but no
unit name
> + compatible = "simple-bus";
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges = <0x00 0x10000000 0x00 0x10000000 0x0 0x10000000>,
> + <0x00 0x02000000 0x00 0x02000000 0x0 0x04000000>,
> + <0x00 0x40000000 0x00 0x40000000 0x0 0x40000000>;
> +
> + liointc0: interrupt-controller@...01400 {
> + compatible = "loongson,liointc-2.0";
> + reg = <0x0 0x16001400 0x0 0x40>,
> + <0x0 0x16001040 0x0 0x8>;
> + reg-names = "main", "isr0";
> +
> + interrupt-controller;
> + #interrupt-cells = <2>;
> +
> + interrupt-parent = <&cpuintc>;
> + interrupts = <2>;
> + interrupt-names = "int0";
> +
> + loongson,parent_int_map = <0xffffffff>, /* int0 */
> + <0x00000000>, /* int1 */
> + <0x00000000>, /* int2 */
> + <0x00000000>; /* int3 */
> + };
> +
> + liointc1: interrupt-controller@...01440 {
> + compatible = "loongson,liointc-2.0";
> + reg = <0x0 0x16001440 0x0 0x40>,
> + <0x0 0x16001048 0x0 0x8>;
> + reg-names = "main", "isr0";
> +
> + interrupt-controller;
> + #interrupt-cells = <2>;
> +
> + interrupt-parent = <&cpuintc>;
> + interrupts = <4>;
> + interrupt-names = "int2";
> +
> + loongson,parent_int_map = <0x00000000>, /* int0 */
> + <0x00000000>, /* int1 */
> + <0xffffffff>, /* int2 */
> + <0x00000000>; /* int3 */
> + };
> +
> + uart0: serial@...00000 {
> + compatible = "ns16550a";
> + reg = <0 0x16100000 0 0x10>;
> + interrupt-parent = <&liointc0>;
> + interrupts = <0 IRQ_TYPE_LEVEL_HIGH>;
> + no-loopback-test;
> + status = "disabled";
> + };
> +
> + uart1: serial@...00400 {
> + compatible = "ns16550a";
> + reg = <0 0x16100400 0 0x10>;
> + interrupt-parent = <&liointc0>;
> + interrupts = <1 IRQ_TYPE_LEVEL_HIGH>;
> + no-loopback-test;
> + status = "disabled";
> + };
> +
> + uart2: serial@...00800 {
> + compatible = "ns16550a";
> + reg = <0 0x16100800 0 0x10>;
> + interrupt-parent = <&liointc0>;
> + interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
> + no-loopback-test;
> + status = "disabled";
> + };
> +
> + uart3: serial@...00c00 {
> + compatible = "ns16550a";
> + reg = <0 0x16100c00 0 0x10>;
> + interrupt-parent = <&liointc0>;
> + interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
> + no-loopback-test;
> + status = "disabled";
> + };
> +
> + uart4: serial@...01000 {
> + compatible = "ns16550a";
> + reg = <0 0x16101000 0 0x10>;
> + interrupt-parent = <&liointc0>;
> + interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
> + no-loopback-test;
> + status = "disabled";
> + };
> +
> + uart5: serial@...01400 {
> + compatible = "ns16550a";
> + reg = <0 0x16101400 0 0x10>;
> + interrupt-parent = <&liointc0>;
> + interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
> + no-loopback-test;
> + status = "disabled";
> + };
> +
> + uart6: serial@...01800 {
> + compatible = "ns16550a";
> + reg = <0 0x16101800 0 0x10>;
> + interrupt-parent = <&liointc0>;
> + interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
> + no-loopback-test;
> + status = "disabled";
> + };
> +
> + uart7: serial@...01c00 {
> + compatible = "ns16550a";
> + reg = <0 0x16101c00 0 0x10>;
> + interrupt-parent = <&liointc0>;
> + interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
> + no-loopback-test;
> + status = "disabled";
> + };
> +
> + uart8: serial@...02000 {
> + compatible = "ns16550a";
> + reg = <0 0x16102000 0 0x10>;
> + interrupt-parent = <&liointc0>;
> + interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
> + no-loopback-test;
> + status = "disabled";
> + };
> +
> + uart9: serial@...02400 {
> + compatible = "ns16550a";
> + reg = <0 0x16102400 0 0x10>;
> + interrupt-parent = <&liointc0>;
> + interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
> + no-loopback-test;
> + status = "disabled";
> + };
> +
> + isa@...00000 {
> + compatible = "isa";
> + #address-cells = <2>;
> + #size-cells = <1>;
> + ranges = <1 0x0 0x0 0x16400000 0x4000>;
> + };
> + };
> +};
> --
> 2.49.0
>
>
--
Thanks.
Binbin
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