linux-kernel - Re: [PATCH 16/20] dt-bindings: memory: snps: Detach Zynq DDRC controller support

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Message-ID: <20220823083243.aovlgu22j7uv73qv@mobilestation>
Date:   Tue, 23 Aug 2022 11:32:43 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Rob Herring <robh@...nel.org>,
        Michal Simek <michal.simek@...inx.com>,
        Borislav Petkov <bp@...en8.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Tony Luck <tony.luck@...el.com>,
        Rob Herring <robh+dt@...nel.org>,
        Manish Narani <manish.narani@...inx.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Michail Ivanov <Michail.Ivanov@...kalelectronics.ru>,
        Pavel Parkhomenko <Pavel.Parkhomenko@...kalelectronics.ru>,
        Punnaiah Choudary Kalluri 
        <punnaiah.choudary.kalluri@...inx.com>,
        Dinh Nguyen <dinguyen@...nel.org>,
        James Morse <james.morse@....com>,
        Robert Richter <rric@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 16/20] dt-bindings: memory: snps: Detach Zynq DDRC
 controller support

On Tue, Aug 23, 2022 at 11:17:23AM +0300, Krzysztof Kozlowski wrote:
> On 22/08/2022 22:07, Serge Semin wrote:
> > The Zynq A05 DDRC controller has nothing in common with DW uMCTL2 DDRC:
> > the CSRs layout is absolutely different and it doesn't has IRQ unlike DW
> > uMCTL2 DDR controller of all versions (v1.x, v2.x and v3.x). Thus there is
> > no any reason to have these controllers described by the same bindings.
> > Thus let's split them up.
> > 
> > While at it rename the original Synopsys uMCTL2 DT-schema file to a more
> > descriptive - snps,dw-umctl2-ddrc.yaml and add a more detailed title and
> > description of the device bindings.
> 

> Filename should be based on compatible, so if renaming then
> snps,ddrc-3.80a.yaml or snps,ddrc.yaml... which leads to original
> filename anyway. Therefore nack for rename.

New requirement? I've submitted not a single patch to the DT-bindings
sources and didn't get any comment from Rob about that. In addition
There are DT bindings with names different from what is defined in the
compatible name. Moreover there are tons of bindings with various
compatible names. What name to choose then? Finally the current name
is too generic to use for actual DW uMCTL2 DDRC controller.

-Sergey

> 
> BTW, if you perform renames, generate patches with proper -M/-C/-B
> arguments so this is detected.
> 
> 
> > 
> > Signed-off-by: Serge Semin <Sergey.Semin@...kalelectronics.ru>
> > --->  .../snps,dw-umctl2-ddrc.yaml                  | 51 +++++++++++++
> 
> This is a mess. I did not get any cover letters, any other patches any
> description of relation between this and your other one.
> 
> It seems you make independent and conflicting changes to the same file,
> so this has to be properly organized.
> 
> Send entire patchset with cover letter with description of all
> dependencies to all maintainers.
> 
> This is unreviewable now, so a no.
> 
> Best regards,
> Krzysztof