linux-kernel - Re: [PATCH v1 1/3] phy: phy-core: allow specifying supply at port level

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Message-ID: <CAE_wzQ_8YzZwizyozU-0MPLX8-hT1Y1LnfYFg+iEvQgYX7zjFg@mail.gmail.com>
Date:	Wed, 25 Mar 2015 15:17:17 -0700
From:	Dmitry Torokhov <dtor@...gle.com>
To:	Kishon Vijay Abraham I <kishon@...com>
Cc:	Arun Ramamurthy <arun.ramamurthy@...adcom.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Arnd Bergmann <arnd@...db.de>, devicetree@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	bcm-kernel-feedback-list@...adcom.com,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Anatol Pomazau <anatol@...gle.com>,
	Jonathan Richardson <jonathar@...adcom.com>,
	Scott Branden <sbranden@...adcom.com>,
	Ray Jui <rjui@...adcom.com>,
	Dmitry Torokhov <dtor@...omium.org>
Subject: Re: [PATCH v1 1/3] phy: phy-core: allow specifying supply at port level

On Wed, Mar 25, 2015 at 3:11 PM, Kishon Vijay Abraham I <kishon@...com> wrote:
> Hi,
>
> On Saturday 21 March 2015 02:55 AM, Arun Ramamurthy wrote:
>> Multi-port phy's may have per-port power supplies. Let's change phy core
>> to first attempt to look up the supply at the port level, and then, if
>> not found, check parent device.
>
> Why not just have every port provide the power supply if it needs?
> I don't think checking for parent device should be present in the phy-core at
> all.

We need to do that if we want to keep compatibility with the current
DTSes: before this patch the supply would be always looked up on
device and not port level.

Thanks,
Dmitry
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