linux-kernel - Re: [Linaro-acpi] [RFC PATCH for Juno 1/2] net: smsc911x add support for probing from ACPI

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Date:	Tue, 09 Sep 2014 02:51:42 -0400
From:	Jon Masters <jcm@...hat.com>
To:	Arnd Bergmann <arnd@...db.de>, linux-arm-kernel@...ts.infradead.org
CC:	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
	Randy Dunlap <rdunlap@...radead.org>,
	Robert Richter <rric@...nel.org>,
	Jason Cooper <jason@...edaemon.net>,
	linaro-acpi@...ts.linaro.org, Marc Zyngier <Marc.Zyngier@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Darren Hart <dvhart@...ux.intel.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Liviu Dudau <Liviu.Dudau@....com>,
	Robert Moore <robert.moore@...el.com>,
	Will Deacon <Will.Deacon@....com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>,
	Lv Zheng <lv.zheng@...el.com>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Olof Johansson <olof@...om.net>,
	Graeme Gregory <gg@...mlogic.co.uk>
Subject: Re: [Linaro-acpi] [RFC PATCH for Juno 1/2] net: smsc911x add support
 for probing from ACPI

Hi Arnd,

On 09/03/2014 11:09 AM, Arnd Bergmann wrote:
> On Wednesday 03 September 2014 01:00:23 Rafael J. Wysocki wrote:

>> Our intention is specifically not to use "random incompatible bindings"
>> in that.  We'd rather have a common venue and process for establishing
>> new bindings for both DT and _DSD in a compatible way.
> 
> Right, I think everyone is on the same page for the embedded x86 case,
> my point was that there is no consensus about that yet among the
> parties involved in arm64 servers.

However, in the case of MAC devices where you might need to specify just
a couple of properties using _DSD, a specific set of discussions has
been instigated. As you mentioned, though, this pertains only to certain
devices and isn't necessarily true for every Ethernet device.
Consequently, while a Juno PoC patch might use a kludge today, that
doesn't mean it's a limitation of ACPI, just of certain devices.

Jon.

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