linux-kernel - Re: [PATCH v2 4/5] ARM: Add basic support for Airoha EN7523 SoC

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Message-ID: <CAFr9PXmCKPfdHnHU7=ALh=j2SDf71ibd8kEnLTK6aPN1vmQVdg@mail.gmail.com>
Date:   Tue, 7 Sep 2021 19:48:02 +0900
From:   Daniel Palmer <daniel@...f.com>
To:     Bert Vermeulen <bert@...t.com>
Cc:     Russell King <linux@...linux.org.uk>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Marc Zyngier <maz@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        John Crispin <john@...ozen.org>,
        Ard Biesheuvel <ardb@...nel.org>,
        YiFei Zhu <yifeifz2@...inois.edu>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Mike Rapoport <rppt@...nel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>
Subject: Re: [PATCH v2 4/5] ARM: Add basic support for Airoha EN7523 SoC

Hi Bert,

On Tue, 7 Sept 2021 at 19:30, Bert Vermeulen <bert@...t.com> wrote:
>
> From: John Crispin <john@...ozen.org>
>
> EN7523 is an armv7 based silicon used inside broadband access type devices
> such as xPON and xDSL. It shares various silicon blocks with MediaTek
> silicon such as the MT7622.

This is a Cortex A53 isn't it? So it's ARMv8. I thought the issue is
that it's actually a 64bit system but you only have a 32bit
bootloader, firmware etc?

Off-topic but related:  Another MediaTek spin off, SigmaStar, seems to
have done exactly the same thing. Cortex A53 chip running as a 32bit
system to avoid having to fix their software. I'm interested to see if
this makes it into arm or arm64. :)

Cheers,

Daniel