linux-kernel - Re: [PATCH v4 06/20] dt-bindings: memory: tegra: Squash tegra20-gart into tegra20-mc

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Message-ID: <20180927184143.GA24866@bogus>
Date:   Thu, 27 Sep 2018 13:41:43 -0500
From:   Rob Herring <robh@...nel.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Joerg Roedel <joro@...tes.org>,
        Robin Murphy <robin.murphy@....com>,
        iommu@...ts.linux-foundation.org, devicetree@...r.kernel.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 06/20] dt-bindings: memory: tegra: Squash tegra20-gart
 into tegra20-mc

On Mon, 24 Sep 2018 03:41:39 +0300, Dmitry Osipenko wrote:
> Splitting GART and Memory Controller wasn't a good decision that was made
> back in the day. Given that the GART driver wasn't ever been used by
> anything in the kernel, we decided that it will be better to correct the
> mistakes of the past and merge two bindings into a single one. As a result
> there is a DT ABI change for the Memory Controller that allows not to
> break newer kernels using older DT and not to break older kernels using
> newer DT, that is done by changing the 'compatible' of the node to
> 'tegra20-mc-gart' and adding a new-required clock property. The new clock
> property also puts the tegra20-mc binding in line with the bindings of the
> later Tegra generations.
> 
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  .../bindings/iommu/nvidia,tegra20-gart.txt    | 14 ----------
>  .../memory-controllers/nvidia,tegra20-mc.txt  | 27 +++++++++++++------
>  2 files changed, 19 insertions(+), 22 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/iommu/nvidia,tegra20-gart.txt
> 

Reviewed-by: Rob Herring <robh@...nel.org>