linux-kernel - Re: [PATCH v6 09/52] dt-bindings: memory: tegra30: mc: Document new interconnect property

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Message-ID: <20201027090550.GI4244@kozik-lap>
Date:   Tue, 27 Oct 2020 10:05:50 +0100
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Georgi Djakov <georgi.djakov@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        MyungJoo Ham <myungjoo.ham@...sung.com>,
        Kyungmin Park <kyungmin.park@...sung.com>,
        Chanwoo Choi <cw00.choi@...sung.com>,
        Mikko Perttunen <cyndis@...si.fi>,
        Viresh Kumar <vireshk@...nel.org>,
        Peter Geis <pgwipeout@...il.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        linux-tegra@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v6 09/52] dt-bindings: memory: tegra30: mc: Document new
 interconnect property

On Mon, Oct 26, 2020 at 01:16:52AM +0300, Dmitry Osipenko wrote:
> Memory controller is interconnected with memory clients and with the
> External Memory Controller. Document new interconnect property which
> turns memory controller into interconnect provider.
> 
> Acked-by: Rob Herring <robh@...nel.org>
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
>  .../bindings/memory-controllers/nvidia,tegra30-mc.yaml       | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra30-mc.yaml b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra30-mc.yaml
> index 84fd57bcf0dc..5436e6d420bc 100644
> --- a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra30-mc.yaml
> +++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra30-mc.yaml
> @@ -57,6 +57,9 @@ properties:
>    "#iommu-cells":
>      const: 1
>  
> +  "#interconnect-cells":
> +    const: 1
> +
>  patternProperties:
>    "^emc-timings-[0-9]+$":
>      type: object
> @@ -120,6 +123,7 @@ required:
>    - clock-names
>    - "#reset-cells"
>    - "#iommu-cells"
> +  - "#interconnect-cells"

Rob,

You were fine with adding a new required property which breaks all
existing DTBs?

Were these bindings marked as unstable? The patchset does not even
say/scream that it breaks the ABI, so this might be quite a surprise for
someone...

Best regards,
Krzysztof