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

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Date:	Thu, 26 Mar 2015 04:09:23 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	Dmitry Torokhov <dtor@...gle.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

Hi,

On Thursday 26 March 2015 03:47 AM, Dmitry Torokhov wrote:
> 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.

ah okay.
so just using regulator_get_optional(&phy->dev, "phy"); should be sufficient
right? Why do we need regulator_get_optional(phy->dev.parent, "phy");?

Thanks
Kishon
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