netdev - Re: [PATCH 30/31] dt-bindings: nds32 CPU Bindings

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Message-ID: <CAEbi=3evxbZ-K--fkuZu_ANfiuoChT=AmRUfEyJ0htK3cy9wdQ@mail.gmail.com>
Date:   Fri, 10 Nov 2017 16:43:11 +0800
From:   Greentime Hu <green.hu@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Rob Herring <robh@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Greentime <greentime@...estech.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        netdev <netdev@...r.kernel.org>,
        Vincent Chen <vincentc@...estech.com>,
        Rick Chen <rick@...estech.com>, Zong Li <zong@...estech.com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH 30/31] dt-bindings: nds32 CPU Bindings

>>> Then having both is not valid. The strings should be in order of best
>>> match to worst match where worst match is typically either older
>>> implementations of IP blocks or generic'ish strings such as "ns16550"
>>> for a UART.
>>
>> Thanks.
>> I would like to explain it more clearly.
>> They are independent ones in implementations.
>> They are implemented based on the same nds32 ISA and architecture spec
>> with different configurations
>> like cache size, page size, cache type(VIPT/PIPT), pipeline stages...
>> Most of them are compatible.
>> They use the same toolchain to build vmlinux which can run on
>> different nds32 cores.
>
> Du you have a name for the ISA spec that distinguishes it from other nds32
> versions that are incompatible? If you do, this could be written like
>
> compatible = "andestech,n13", "andestech,nds32v3.0";
>
> to signify that a an 'n13' core implements the 'v3.0' ISA (will it
> whatever you call the ISA in reality).
>

Thanks. I got you.
I will use a proper name(maybe 'nds32v3') of ISA in this compatible
string in the next version patch.