linux-kernel - Re: [RFC v2 3/5] arm64: socfpga: rename ARCH_STRATIX10 to ARCH

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Date:   Thu, 11 Mar 2021 08:08:47 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Tom Rix <trix@...hat.com>, Lee Jones <lee.jones@...aro.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Dinh Nguyen <dinguyen@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Moritz Fischer <mdf@...nel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        DTML <devicetree@...r.kernel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        linux-edac@...r.kernel.org, linux-fpga@...r.kernel.org,
        Networking <netdev@...r.kernel.org>,
        linux-stm32@...md-mailman.stormreply.com, arm-soc <arm@...nel.org>,
        SoC Team <soc@...nel.org>, Olof Johansson <olof@...om.net>
Subject: Re: [RFC v2 3/5] arm64: socfpga: rename ARCH_STRATIX10 to
 ARCH_SOCFPGA64

On 10/03/2021 17:42, Arnd Bergmann wrote:
> On Wed, Mar 10, 2021 at 4:54 PM Krzysztof Kozlowski
> <krzysztof.kozlowski@...onical.com> wrote:
>> On 10/03/2021 16:47, Krzysztof Kozlowski wrote:
>>> This edac Altera driver is very weird... it uses the same compatible
>>> differently depending whether this is 32-bit or 64-bit (e.g. Stratix
>>> 10)! On ARMv7 the compatible means for example one IRQ... On ARMv8, we
>>> have two. It's quite a new code (2019 from Intel), not some ancient
>>> legacy, so it should never have been accepted...
>>
>> Oh, it's not that horrible as it sounds. They actually have different
>> compatibles for edac driver with these differences (e.g. in interrupts).
>> They just do not use them and instead check for the basic (common?)
>> compatible and architecture... Anyway without testing I am not the
>> person to fix the edac driver.
> 
> Ok, This should be fixed properly as you describe, but as a quick hack
> it wouldn't be hard to just change the #ifdef to check for CONFIG_64BIT
> instead of CONFIG_ARCH_STRATIX10 during the rename of the config
> symbol.

This would work. The trouble with renaming ARCH_SOCFPGA into
ARCH_INTEL_SOCFPGA is that still SOCFPGA will appear in many other
Kconfig symbols or even directory paths.

Let me use ARCH_INTEL_SOCFPGA for 64bit here and renaming of 32bit a
little bit later.

Best regards,
Krzysztof