linux-kernel - Re: [PATCH v3 06/11] dt-bindings: timer: Add Sophgo sg2042 CLINT timer

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Date:   Thu, 28 Sep 2023 10:55:59 +0100
From:   Conor Dooley <conor.dooley@...rochip.com>
To:     Inochi Amaoto <inochiama@...look.com>
CC:     Conor Dooley <conor@...nel.org>, <aou@...s.berkeley.edu>,
        <chao.wei@...hgo.com>, <devicetree@...r.kernel.org>,
        <emil.renner.berthing@...onical.com>, <guoren@...nel.org>,
        <jszhang@...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>,
        Anup Patel <apatel@...tanamicro.com>,
        Chen Wang <wangchen20@...as.ac.cn>
Subject: Re: [PATCH v3 06/11] dt-bindings: timer: Add Sophgo sg2042 CLINT
 timer

On Thu, Sep 28, 2023 at 05:39:17PM +0800, Inochi Amaoto wrote:
> >>>> If so, whether we should replace the "thead,c900-clint" with these separate
> >>>> DT to describe the thead clint?
> >>>
> >>> No, since that's a different device, right?
> >>>
> >>
> >> Yes. It seems sophgo defined these by themselves, but the T-HEAD. Sorry
> >> for my mistake.
> >
> >I'm sorry, I don't quite understand this. Do you mean that the IP is not
> >T-Head, but rather designed by Sophgo? If the IP is made by T-Head, then
> >I would expect to see something like
> >
> >compatible = "sophgo,sg2042-aclint-mtimer", "thead,c900-aclint-mtimer";
> >
> >in the dts.
> >
> 
> AFAIK, the clint IP is designed by T-HEAD, not Sophgo. Sophgo change this
> IP layout to fit its weird cpu design. But in my test, the timer and mswi
> of clint is compatible with the T-HEAD one.

> So we should treat this as T-HEAD IP, not Sophgo?

Yes, in the way I demonstrated above probably.

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