linux-kernel - Re: [PATCH 1/2] phy: usbphy: Add dt documentation for Broadcom Cygnus USB PHY driver

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Message-ID: <3142298.YeoA7WAayD@wuerfel>
Date:	Wed, 11 Mar 2015 22:47:30 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	Arun Ramamurthy <arun.ramamurthy@...adcom.com>
Cc:	linux-arm-kernel@...ts.infradead.org,
	Alan Stern <stern@...land.harvard.edu>,
	Mark Rutland <mark.rutland@....com>,
	devicetree@...r.kernel.org, Scott Branden <sbranden@...adcom.com>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Ray Jui <rjui@...adcom.com>, linux-kernel@...r.kernel.org,
	Kishon Vijay Abraham I <kishon@...com>,
	Jonathan Richardson <jonathar@...adcom.com>,
	Rob Herring <robh+dt@...nel.org>,
	bcm-kernel-feedback-list@...adcom.com,
	Dmitry Torokhov <dtor@...gle.com>,
	Kumar Gala <galak@...eaurora.org>,
	Anatol Pomazau <anatol@...gle.com>
Subject: Re: [PATCH 1/2] phy: usbphy: Add dt documentation for Broadcom Cygnus USB PHY driver

On Wednesday 11 March 2015 14:37:58 Arun Ramamurthy wrote:
> On 15-03-10 01:27 PM, Arnd Bergmann wrote:
> > On Wednesday 25 February 2015 16:24:06 Arun Ramamurthy wrote:
> >>>>> Should I run this by Alan Stern?
> >>>>
> >>>> I've added him to Cc here. He clearly didn't know the background about
> >>>> the DT binding change, and should not need to, but he may have an opinion
> >>>> on what names we should use.
> >>>>
> >>>
> >> Arnd, should I re patch the ehci-platform driver to avoid phy-names
> >> entirely? Alan, if not do you have an opinion on what the usb phy names
> >> should be? The current patch uses "usbp" + port number such as "usbp0" ,
> >> "usbp1" etc
> >
> > I think avoiding the phy names would be best here, but it requires a
> > kernel API change first, because we do not have a way to get a phy
> > by index as we do for other subsystems (e.g. clocks or gpios).
> >
> Arnd , there is an existing api _of_phy_get that gets a phy by index. 
> However it is not exported and is called from of_phy_get which is in 
> turn called from devm_of_phy_get.
> 
> My plan is to create a new function maybe devm_of_phy_get_by_index that 
> calls _of_phy_get directly? What are your thoughts?

Sounds good to me.

	Arnd
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