linux-kernel - Re: [PATCH v5 5/6] bus: cdmm: Add MIPS R5 arch support

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Message-ID: <CAK8P3a09RW+zCMJ9Luh2C3NkYPdY4Esu6EKk_QX_i4faV-rUjg@mail.gmail.com>
Date:   Tue, 14 Jul 2020 15:28:30 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Serge Semin <Sergey.Semin@...kalelectronics.ru>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Rob Herring <robh+dt@...nel.org>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <maz@...nel.org>, James Hogan <jhogan@...nel.org>,
        "open list:BROADCOM NVRAM DRIVER" <linux-mips@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v5 5/6] bus: cdmm: Add MIPS R5 arch support

On Tue, Jul 14, 2020 at 2:58 PM Serge Semin
<Sergey.Semin@...kalelectronics.ru> wrote:
>
>  config MIPS_CDMM
>         bool "MIPS Common Device Memory Map (CDMM) Driver"
> -       depends on CPU_MIPSR2
> +       depends on CPU_MIPSR2 || CPU_MIPSR5
>         help

Wouldn't a kernel built for P5600 have CPU_MIPSR2 set already?
I thought R5 was just a backwards-compatible extension of R2.

If not, what about R3?

      Arnd