linux-kernel - Re: [RFC PATCH] drivers: phy: add generic PHY framework

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Message-ID: <20120917131926.GA7699@arwen.pp.htv.fi>
Date:	Mon, 17 Sep 2012 16:19:29 +0300
From:	Felipe Balbi <balbi@...com>
To:	"ABRAHAM, KISHON VIJAY" <kishon@...com>
Cc:	Chen Peter-B29397 <B29397@...escale.com>,
	"balbi@...com" <balbi@...com>, "arnd@...db.de" <arnd@...db.de>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	Zhao Richard-B20223 <B20223@...escale.com>,
	"alexander.shishkin@...ux.intel.com" 
	<alexander.shishkin@...ux.intel.com>,
	"mkl@...gutronix.de" <mkl@...gutronix.de>,
	"marex@...x.de" <marex@...x.de>
Subject: Re: [RFC PATCH] drivers: phy: add generic PHY framework

On Mon, Sep 17, 2012 at 11:19:53AM +0530, ABRAHAM, KISHON VIJAY wrote:
> Hi,
> 
> On Mon, Sep 17, 2012 at 6:50 AM, Chen Peter-B29397 <B29397@...escale.com> wrote:
> >
> >>
> >> The PHY framework provides a set of API's for the PHY drivers to
> >> create/remove a PHY and the PHY users to obtain a reference to the PHY
> >> using or without using phandle. If the PHY users has to obtain a
> >> reference to
> >> the PHY without using phandle, the platform specfic intialization code
> >> (say
> >> from board file) should have already called phy_bind with the binding
> >> information. The binding information consists of phy's device name, phy
> >> user device name and an index. The index is used when the same phy user
> >> binds to mulitple phys.
> >>
> >
> > What's an example of "the same phy user binds to multiple phys"?
> 
> Single controller using multiple phys..

to be more specific here: any usb3 controller needs a USB2 PHY and USB3
PHY.

-- 
balbi

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