linux-kernel - Re: [PATCH v4 08/10] riscv: dts: add initial Sophgo SG2042 SoC device tree

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Message-ID: <ZSAbgxZItMsEHfio@xhacker>
Date:   Fri, 6 Oct 2023 22:36:51 +0800
From:   Jisheng Zhang <jszhang@...nel.org>
To:     Chen Wang <unicornxw@...il.com>
Cc:     aou@...s.berkeley.edu, chao.wei@...hgo.com, conor@...nel.org,
        devicetree@...r.kernel.org, guoren@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org, palmer@...belt.com,
        paul.walmsley@...ive.com, robh+dt@...nel.org,
        xiaoguang.xing@...hgo.com, apatel@...tanamicro.com,
        Chen Wang <unicorn_wang@...look.com>,
        Inochi Amaoto <inochiama@...look.com>
Subject: Re: [PATCH v4 08/10] riscv: dts: add initial Sophgo SG2042 SoC
 device tree

On Wed, Oct 04, 2023 at 11:44:06PM +0800, Chen Wang wrote:
> From: Chen Wang <unicorn_wang@...look.com>
> 
> Milk-V Pioneer motherboard is powered by SG2042.
> 
> SG2042 is server grade chip with high performance, low power
> consumption and high data throughput.
> Key features:
> - 64 RISC-V cpu cores
> - 4 cores per cluster, 16 clusters on chip
> - More info is available at [1].
> 
> Currently only support booting into console with only uart,
> other features will be added soon later.
> 
> Reviewed-by: Guo Ren <guoren@...nel.org>
> Acked-by: Chao Wei <chao.wei@...hgo.com>
> Co-developed-by: Xiaoguang Xing <xiaoguang.xing@...hgo.com>
> Signed-off-by: Xiaoguang Xing <xiaoguang.xing@...hgo.com>
> Co-developed-by: Inochi Amaoto <inochiama@...look.com>
> Signed-off-by: Inochi Amaoto <inochiama@...look.com>
> Signed-off-by: Chen Wang <unicorn_wang@...look.com>
> 
> Link: https://en.sophgo.com/product/introduce/sg2042.html [1]
> ---
>  MAINTAINERS                                 |    1 +
>  arch/riscv/boot/dts/sophgo/sg2042-cpus.dtsi | 2000 +++++++++++++++++++
>  arch/riscv/boot/dts/sophgo/sg2042.dtsi      |  325 +++
>  3 files changed, 2326 insertions(+)
>  create mode 100644 arch/riscv/boot/dts/sophgo/sg2042-cpus.dtsi
>  create mode 100644 arch/riscv/boot/dts/sophgo/sg2042.dtsi
> 
> diff --git a/MAINTAINERS b/MAINTAINERS
> index 97cb8abcfeee..fedf042e5fb4 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -20067,6 +20067,7 @@ SOPHGO DEVICETREES
>  M:	Chao Wei <chao.wei@...hgo.com>
>  M:	Chen Wang <unicorn_wang@...look.com>
>  S:	Maintained
> +F:	arch/riscv/boot/dts/sophgo/
>  F:	Documentation/devicetree/bindings/riscv/sophgo.yaml
>  
>  SOUND
> diff --git a/arch/riscv/boot/dts/sophgo/sg2042-cpus.dtsi b/arch/riscv/boot/dts/sophgo/sg2042-cpus.dtsi
> new file mode 100644
> index 000000000000..b136b6c4128c
> --- /dev/null
> +++ b/arch/riscv/boot/dts/sophgo/sg2042-cpus.dtsi
> @@ -0,0 +1,2000 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +/*
> + * Copyright (C) 2022 Sophgo Technology Inc. All rights reserved.
> + */
...

> +		intc: interrupt-controller@...0000000 {
> +			compatible = "sophgo,sg2042-plic", "thead,c900-plic";
> +			#address-cells = <0>;
> +			#interrupt-cells = <2>;
> +			reg = <0x00000070 0x90000000 0x00000000 0x04000000>;
> +			interrupt-controller;
> +			interrupts-extended =
> +				<&cpu0_intc 0xffffffff>,  <&cpu0_intc 9>,

-1 may not be correct, is machine external interrupt(id: 11) supported?

Thanks