linux-kernel - Re: [PATCH 00/12] Add minimal support for Exynos850 SoC

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Message-ID: <c3486111-0ec9-9679-d2a2-68b2f33a2450@canonical.com>
Date:   Fri, 30 Jul 2021 19:21:29 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Sam Protsenko <semen.protsenko@...aro.org>,
        Sylwester Nawrocki <s.nawrocki@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Tomasz Figa <tomasz.figa@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>, Stephen Boyd <sboyd@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Charles Keepax <ckeepax@...nsource.wolfsonmicro.com>,
        Ryu Euiyoul <ryu.real@...sung.com>,
        Tom Gall <tom.gall@...aro.org>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        John Stultz <john.stultz@...aro.org>,
        Amit Pundir <amit.pundir@...aro.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
        linux-serial@...r.kernel.org
Subject: Re: [PATCH 00/12] Add minimal support for Exynos850 SoC

On 30/07/2021 17:18, Krzysztof Kozlowski wrote:
> On 30/07/2021 16:49, Sam Protsenko wrote:
>> This patch series adds initial platform support for Samsung Exynos850
>> SoC [1]. With this patchset it's possible to run the kernel with BusyBox
>> rootfs as a RAM disk. More advanced platform support (like MMC driver
>> additions) will be added later. The idea is to keep the first submission
>> minimal to ease the review, and then build up on top of that.
>>
>> [1] https://www.samsung.com/semiconductor/minisite/exynos/products/mobileprocessor/exynos-850/
>>
> 
> Great work!
> 
> What's the SoC revision number (should be accessible via
> /sys/bus/soc/devices/soc0/)? Recent wrap in numbering of Exynos chips
> might bring confusion...

Judging by vendor's sources it is quite confusing. It looks mostly like
Exynos3830 but in few other cases it uses Exynos9 compatibles (Exynos9,
Exynos9820). Only in few places there is Exynos850. Marketing department
made it so confusing...  The revision embedded in SoC would be very
interesting.

Anyway, judging by current versioning, there is a risk Samsung will come
with a new chipset name conflicting with existing ones. It already
overflowed.

It's even worse with a thingy called "Exynos9 auto" which hides
numbering even more.


Best regards,
Krzysztof