linux-kernel - Re: [PATCH v6 07/15] dt-bindings: memory: tegra30: Convert to Tegra124 YAML

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Date:   Wed, 3 Jul 2019 03:48:46 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Rob Herring <robh+dt@...nel.org>
Cc:     Michael Turquette <mturquette@...libre.com>,
        Joseph Lo <josephl@...dia.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Prashant Gaikwad <pgaikwad@...dia.com>,
        Stephen Boyd <sboyd@...nel.org>, devicetree@...r.kernel.org,
        linux-clk <linux-clk@...r.kernel.org>,
        linux-tegra@...r.kernel.org,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v6 07/15] dt-bindings: memory: tegra30: Convert to
 Tegra124 YAML

01.07.2019 22:30, Dmitry Osipenko пишет:
> 01.07.2019 22:11, Rob Herring пишет:
>> On Sun, Jun 30, 2019 at 3:04 PM Dmitry Osipenko <digetx@...il.com> wrote:
>>>
>>
>> "Convert" implies you delete the old binding doc.
> 
> Yes, unfortunately the deletion got lost by accident after rebase and it was already
> too late when I noticed that. Will be fixed in the next revision.
> 
>>> The Tegra30 binding will actually differ from the Tegra124 a tad, in
>>> particular the EMEM configuration description. Hence rename the binding
>>> to Tegra124 during of the conversion to YAML.
>>>
>>> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
>>> ---
>>>  .../nvidia,tegra124-mc.yaml                   | 149 ++++++++++++++++++
>>>  1 file changed, 149 insertions(+)
>>>  create mode 100644 Documentation/devicetree/bindings/memory-controllers/nvidia,tegra124-mc.yaml
>>>
>>> diff --git a/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra124-mc.yaml b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra124-mc.yaml
>>> new file mode 100644
>>> index 000000000000..d18242510295
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/memory-controllers/nvidia,tegra124-mc.yaml
>>> @@ -0,0 +1,149 @@
>>> +# SPDX-License-Identifier: (GPL-2.0)
>>> +%YAML 1.2
>>> +---
>>> +$id: http://devicetree.org/schemas/memory-controllers/nvidia,tegra124-mc.yaml#
>>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>>> +
>>> +title:
>>> +  NVIDIA Tegra124 SoC Memory Controller
>>> +
>>> +maintainers:
>>> +  - Jon Hunter <jonathanh@...dia.com>
>>> +  - Thierry Reding <thierry.reding@...il.com>
>>> +
>>> +description: |
>>> +  Tegra124 SoC features a hybrid 2x32-bit / 1x64-bit memory controller.
>>> +  These are interleaved to provide high performance with the load shared across
>>> +  two memory channels. The Tegra124 Memory Controller handles memory requests
>>> +  from internal clients and arbitrates among them to allocate memory bandwidth
>>> +  for DDR3L and LPDDR3 SDRAMs.
>>> +
>>> +properties:
>>> +  compatible:
>>> +    const: nvidia,tegra124-mc
>>> +
>>> +  reg:
>>> +    maxItems: 1
>>> +    description:
>>> +      Physical base address.
>>> +
>>> +  clocks:
>>> +    maxItems: 1
>>> +    description:
>>> +      Memory Controller clock.
>>> +
>>> +  clock-names:
>>> +    items:
>>> +      - const: mc
>>> +
>>> +  interrupts:
>>> +    maxItems: 1
>>> +    description:
>>> +      Memory Controller interrupt.
>>> +
>>> +  "#reset-cells":
>>> +    const: 1
>>> +
>>> +  "#iommu-cells":
>>> +    const: 1
>>> +
>>> +patternProperties:
>>> +  ".*":
>>
>> Please define a node name or pattern for node names.
> 
> There was no pattern specified in the original binding. But I guess the existing
> upstream device-trees could be used as the source for the pattern.

Actually it looks like the use of explicit pattern is not really a good idea because
device-tree could have node named in a way that it doesn't match the pattern and hence
dtbs_check silently skips the non-matching nodes. Is there any way to express that
non-matching nodes shall be rejected?