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

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Date:   Sat, 7 Oct 2023 13:29:59 +0800
From:   Chen Wang <unicorn_wang@...look.com>
To:     Jisheng Zhang <jszhang@...nel.org>, 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,
        Inochi Amaoto <inochiama@...look.com>
Subject: Re: [PATCH v4 08/10] riscv: dts: add initial Sophgo SG2042 SoC device
 tree


On 2023/10/6 22:36, Jisheng Zhang wrote:
> 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?

Just double-checked with sophgo IC engineers, sg2042 plic supports 
external interrupt, so 11 should be better, I will try to fix this in v5.

Thanks for your kindly reminder, Jisheng.


>
> Thanks