linux-kernel - Re: [PATCH 01/21] of: Add cpu node iterator for_each_of_cpu

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Message-ID: <871s87jz3g.fsf@concordia.ellerman.id.au>
Date:   Wed, 31 Oct 2018 01:20:03 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Rob Herring <robh@...nel.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Cc:     Frank Rowand <frowand.list@...il.com>
Subject: Re: [PATCH 01/21] of: Add cpu node iterator for_each_of_cpu_node()

Michael Ellerman <mpe@...erman.id.au> writes:
> Hi Rob,
>
> Sorry I missed this when you posted it.
>
> Rob Herring <robh@...nel.org> writes:
>> Iterating thru cpu nodes is a common pattern. Create a common iterator
>> which can find child nodes either by node name or device_type == cpu.
>> Using the former will allow for eventually dropping device_type
>> properties which are deprecated for FDT.
>
> Device trees we see on powerpc generally don't (never?) use "cpu" as the
> node name for CPU nodes. And many of those device trees come from
> firmware, so we can't update them.
>
> So dropping support for device_type is a non-starter from our POV.

ps. presumably that's what you meant by deprecated *for FDT*.

But anyway just wanted to make sure we are on the same page.

cheers