netdev - stmmac dtc warnings 4.12-rc1

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Date:   Tue, 16 May 2017 09:46:30 +0200
From:   Niklas Cassel <niklas.cassel@...s.com>
To:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...com>,
        Joao Pinto <Joao.Pinto@...opsys.com>,
        Thierry Reding <treding@...dia.com>,
        Mark Rutland <mark.rutland@....com>,
        Rob Herring <robh+dt@...nel.org>,
        David Miller <davem@...emloft.net>
CC:     <devicetree@...r.kernel.org>, netdev <netdev@...r.kernel.org>
Subject: stmmac dtc warnings 4.12-rc1

Hello

With the dtc in linux 4.12-rc1 we get the following
warning when compiling our stmmac node:

Warning (simple_bus_reg): Node /amba/stmmac-axi-config missing or empty reg/ranges property

Note that we do follow the example binding for stmmac:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/net/stmmac.txt

The binding does not specify a reg/ranges property for the stmmac-axi-config node.
(Neither does the mtl_rx_setup/mtl_tx_setup nodes.)

We are building with a local patch for dtc that fails on warnings (like -Werror).
However, I figure that there shouldn't be any warnings when compiling a dtc,
so what's the best solution here?
Add a reg = <0> property to the stmmac-axi-config/mtl_rx_setup/mtl_tx_setup nodes?

Regards,
Niklas