linux-kernel - Re: [PATCH 00/23] Add support for Tesla Full Self-Driving (FSD) SoC

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Message-ID: <5e3f84e0-7b91-8eac-1643-d44f61a47620@canonical.com>
Date:   Fri, 14 Jan 2022 08:34:26 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Alim Akhtar <alim.akhtar@...sung.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        olof@...om.net
Cc:     soc@...nel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linus.walleij@...aro.org,
        catalin.marinas@....com, robh+dt@...nel.org,
        s.nawrocki@...sung.com, linux-samsung-soc@...r.kernel.org,
        pankaj.dubey@...sung.com, arnd@...db.de,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 00/23] Add support for Tesla Full Self-Driving (FSD) SoC

On 14/01/2022 06:41, Alim Akhtar wrote:
> Hi Krzysztof,
> 
>> -----Original Message-----
>> From: Krzysztof Kozlowski [mailto:krzysztof.kozlowski@...onical.com]
>> Sent: Thursday, January 13, 2022 6:02 PM
>> To: Alim Akhtar <alim.akhtar@...sung.com>; linux-arm-
>> kernel@...ts.infradead.org; linux-kernel@...r.kernel.org
>> Cc: soc@...nel.org; linux-clk@...r.kernel.org; devicetree@...r.kernel.org;
>> olof@...om.net; linus.walleij@...aro.org; catalin.marinas@....com;
>> robh+dt@...nel.org; s.nawrocki@...sung.com; linux-samsung-
>> soc@...r.kernel.org; pankaj.dubey@...sung.com
>> Subject: Re: [PATCH 00/23] Add support for Tesla Full Self-Driving (FSD) SoC
>>
>> On 13/01/2022 13:11, Alim Akhtar wrote:
>>> This patch set adds basic support for the Tesla Full Self-Driving
>>> (FSD) SoC. This SoC contains three clusters of four Cortex-A72 CPUs,
>>> as well as several IPs.
>>>
>>> Patches 1 to 8 provide support for the clock controller (which is
>>> designed similarly to Exynos SoCs).
>>>
>>> The remaining changes provide pinmux support, initial device tree
>>> support, and SPI, ADC, and MCT IP functionality.
>>
>> Does FSD have some version number? The FDS, especially in compatibles,
>> looks quite generic, so what will happen if a newer SoC comes later? You
>> would have:
>> - tesla,fsd-pinctrl
>> - tesla,fsd-xxxx-pinctrl (where xxxx could be some new version)
>>
>> This will be extra confusing, because fsd-pinctrl looks like the generic one,
>> while it is specific...
>>
> AFAIK, there is no version for FSD SoC (like we see on Exynos or any other SoC)
> In case something comes in future, may be just adopt as Olof suggested in the other thread like fsd2 etc..
>> Best regards,
>> Krzysztof

The naming is still confusing. The SoC is FSD, compatible is "fsd" but
entire sub-architecture is also FSD called. Therefore it looks like
creating entire sub-architecture for only one SoC, which actually in
multiple pieces is or looks like Samsung Exynos (designed by Samsung,
using several blocks from Exynos SoC).

Best regards,
Krzysztof