From: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
To: Sam Protsenko <semen.protsenko@linaro.org>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>,
Chanwoo Choi <cw00.choi@samsung.com>,
Linus Walleij <linus.walleij@linaro.org>,
Tomasz Figa <tomasz.figa@gmail.com>,
Rob Herring <robh+dt@kernel.org>, Stephen Boyd <sboyd@kernel.org>,
Michael Turquette <mturquette@baylibre.com>,
Jiri Slaby <jirislaby@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Charles Keepax <ckeepax@opensource.wolfsonmicro.com>,
Ryu Euiyoul <ryu.real@samsung.com>,
Tom Gall <tom.gall@linaro.org>,
Sumit Semwal <sumit.semwal@linaro.org>,
John Stultz <john.stultz@linaro.org>,
Amit Pundir <amit.pundir@linaro.org>,
devicetree <devicetree@vger.kernel.org>,
linux-arm Mailing List <linux-arm-kernel@lists.infradead.org>,
linux-clk <linux-clk@vger.kernel.org>,
"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linux Samsung SOC <linux-samsung-soc@vger.kernel.org>,
"open list:SERIAL DRIVERS" <linux-serial@vger.kernel.org>
Subject: Re: [PATCH 00/12] Add minimal support for Exynos850 SoC
Date: Sat, 31 Jul 2021 10:12:47 +0200 [thread overview]
Message-ID: <2dacc205-04ce-c206-a393-50ba0d5aa1a7@canonical.com> (raw)
In-Reply-To: <13f166bb-7103-25d5-35a6-8ec53a1f1817@canonical.com>
On 31/07/2021 09:29, Krzysztof Kozlowski wrote:
> On 30/07/2021 21:02, Sam Protsenko wrote:
>> Hi Krzysztof,
>>
>> On Fri, 30 Jul 2021 at 20:21, Krzysztof Kozlowski
>> <krzysztof.kozlowski@canonical.com> wrote:
>>>
>>> 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!
>>>>
>>
>> Thanks, Krzysztof! And thank you for reviewing the whole series.
>>
>>>> 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...
>>
>> # cat /sys/devices/soc0/revision
>> 0
>
> soc_id but you're right it won't be set for unknown SoCs. You need to
> extend drivers/soc/samsung/exynos-chipid.c to parse new values (E3830000
> for product ID) and maybe new register offsets (previous offset is 0x0,
> for 3830 is 0x10 I think). Also revision mask might change.
>
>>> 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.
>>>
>>
>> As I understand, this SoC is called Exynos850 everywhere now.
>> Exynos3830 is its old name, not used anymore. As you noticed from
>> patch #2, it shares some definitions with Exynos9 SoC, so I guess some
>> software is similar for both architectures. Not sure about hardware
>> though, never worked with Exynos9 CPUs. Anyway, I asked Samsung
>> representatives about naming, and it seems like we should stick to
>> "Exynos850" name, even in code.
>
>
> Since the chip identifies itself as E3830000, I would prefer naming
> matching real product ID instead of what is pushed by marketing or sales
> representatives. The marketing names don't have to follow any
> engineering rules, they can be changed and renamed. Sales follows rather
> money and corporate rules, not consistency for upstream project.
On the other hand we have already two exceptions for naming
inconsistency - Exynos3250 identifies itself as 3472 (which is confusing
because 3250 is two core and there is a separate quad-core
Exyons3472...) and Exynos5800 is actually marketing name for a revision
of Exynos5422. Maybe indeed will be easier to go with the branded name
850...
Best regards,
Krzysztof
next prev parent reply other threads:[~2021-07-31 8:13 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-30 14:49 [PATCH 00/12] Add minimal support for Exynos850 SoC Sam Protsenko
2021-07-30 14:49 ` [PATCH 01/12] pinctrl: samsung: Fix pinctrl bank pin count Sam Protsenko
2021-07-30 14:49 ` [PATCH 02/12] pinctrl: samsung: Add Exynos850 SoC specific data Sam Protsenko
2021-07-30 15:22 ` Krzysztof Kozlowski
2021-08-02 19:24 ` Sam Protsenko
2021-07-30 14:49 ` [PATCH 03/12] dt-bindings: pinctrl: samsung: Add Exynos850 doc Sam Protsenko
2021-07-30 15:24 ` Krzysztof Kozlowski
2021-07-30 19:31 ` Sam Protsenko
2021-07-30 14:49 ` [PATCH 04/12] tty: serial: samsung: Init USI to keep clocks running Sam Protsenko
2021-07-30 16:31 ` Krzysztof Kozlowski
2021-08-02 23:06 ` Sam Protsenko
2021-08-03 7:37 ` Krzysztof Kozlowski
2021-08-03 11:41 ` Sam Protsenko
2021-07-30 14:49 ` [PATCH 05/12] tty: serial: samsung: Fix driver data macros style Sam Protsenko
2021-07-30 16:34 ` Krzysztof Kozlowski
2021-07-30 14:49 ` [PATCH 06/12] tty: serial: samsung: Add Exynos850 SoC data Sam Protsenko
2021-07-30 15:05 ` Andy Shevchenko
2021-07-30 16:05 ` Krzysztof Kozlowski
2021-07-30 23:10 ` Sam Protsenko
2021-07-31 7:12 ` Krzysztof Kozlowski
2021-07-30 14:49 ` [PATCH 07/12] dt-bindings: serial: samsung: Add Exynos850 doc Sam Protsenko
2021-07-30 16:35 ` Krzysztof Kozlowski
2021-07-30 19:04 ` Sam Protsenko
2021-07-30 14:49 ` [PATCH 08/12] MAINTAINERS: Cover Samsung clock YAML bindings Sam Protsenko
2021-07-30 15:06 ` Andy Shevchenko
2021-07-30 15:25 ` Krzysztof Kozlowski
2021-07-30 17:32 ` Sam Protsenko
2021-07-30 14:49 ` [PATCH 09/12] dt-bindings: clock: Add bindings for Exynos850 clock controller Sam Protsenko
2021-07-30 15:43 ` Krzysztof Kozlowski
2021-08-03 11:55 ` Sam Protsenko
2021-07-30 22:28 ` Rob Herring
2021-07-30 14:49 ` [PATCH 10/12] clk: samsung: Add Exynos850 clock driver stub Sam Protsenko
2021-07-30 15:11 ` Andy Shevchenko
2021-07-30 17:24 ` Sam Protsenko
2021-07-30 14:49 ` [PATCH 11/12] dt-bindings: interrupt-controller: Add IRQ constants for Exynos850 Sam Protsenko
2021-07-31 8:45 ` Krzysztof Kozlowski
2021-08-03 12:58 ` Sam Protsenko
2021-07-30 14:49 ` [PATCH 12/12] arm64: dts: exynos: Add Exynos850 SoC support Sam Protsenko
2021-07-30 16:50 ` Marc Zyngier
2021-08-04 14:39 ` Sam Protsenko
2021-08-04 15:01 ` Marc Zyngier
2021-08-04 18:37 ` Sam Protsenko
2021-08-05 7:39 ` Marc Zyngier
2021-08-05 15:30 ` Sam Protsenko
2021-08-05 15:50 ` Marc Zyngier
2021-08-04 18:36 ` Krzysztof Kozlowski
2021-08-04 21:30 ` Sam Protsenko
2021-08-05 7:17 ` Krzysztof Kozlowski
2021-08-05 7:30 ` Marc Zyngier
2021-08-05 7:35 ` Krzysztof Kozlowski
2021-07-31 9:03 ` Krzysztof Kozlowski
2021-08-05 23:06 ` Sam Protsenko
2021-08-06 7:48 ` Krzysztof Kozlowski
2021-08-06 12:07 ` Sam Protsenko
2021-08-06 12:32 ` Krzysztof Kozlowski
2021-08-06 12:48 ` Krzysztof Kozlowski
2021-08-06 16:57 ` Sam Protsenko
2021-08-06 20:32 ` Paweł Chmiel
2021-09-06 15:16 ` Sam Protsenko
2021-07-30 15:18 ` [PATCH 00/12] Add minimal support for Exynos850 SoC Krzysztof Kozlowski
2021-07-30 17:21 ` Krzysztof Kozlowski
2021-07-30 19:02 ` Sam Protsenko
2021-07-31 7:29 ` Krzysztof Kozlowski
2021-07-31 8:12 ` Krzysztof Kozlowski [this message]
2021-08-02 23:27 ` Sam Protsenko
2021-08-03 7:41 ` Krzysztof Kozlowski
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2dacc205-04ce-c206-a393-50ba0d5aa1a7@canonical.com \
--to=krzysztof.kozlowski@canonical.com \
--cc=amit.pundir@linaro.org \
--cc=ckeepax@opensource.wolfsonmicro.com \
--cc=cw00.choi@samsung.com \
--cc=devicetree@vger.kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=jirislaby@kernel.org \
--cc=john.stultz@linaro.org \
--cc=linus.walleij@linaro.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-gpio@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-samsung-soc@vger.kernel.org \
--cc=linux-serial@vger.kernel.org \
--cc=mturquette@baylibre.com \
--cc=robh+dt@kernel.org \
--cc=ryu.real@samsung.com \
--cc=s.nawrocki@samsung.com \
--cc=sboyd@kernel.org \
--cc=semen.protsenko@linaro.org \
--cc=sumit.semwal@linaro.org \
--cc=tom.gall@linaro.org \
--cc=tomasz.figa@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).