linux-kernel - Re: [PATCH v4 1/7] phy: add a driver for the Berlin SATA PHY

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Date:	Tue, 20 May 2014 16:03:25 +0200
From:	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>
To:	Andrew Lunn <andrew@...n.ch>
Cc:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Antoine Ténart 
	<antoine.tenart@...e-electrons.com>,
	thomas.petazzoni@...e-electrons.com, zmxu@...vell.com,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	kishon@...com, linux-ide@...r.kernel.org,
	alexandre.belloni@...e-electrons.com, jszhang@...vell.com,
	tj@...nel.org, linux-arm-kernel@...ts.infradead.org,
	sebastian.hesselbarth@...il.com
Subject: Re: [PATCH v4 1/7] phy: add a driver for the Berlin SATA PHY

On Tue, May 20, 2014 at 03:49:42PM +0200, Andrew Lunn wrote:
> On Tue, May 20, 2014 at 02:34:20PM +0200, Bartlomiej Zolnierkiewicz wrote:
> > On Tuesday, May 20, 2014 11:04:29 AM Antoine Ténart wrote:
> > > 
> > > diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> > > index 4906c27fa3bd..b31b1986fda4 100644
> > > --- a/drivers/phy/Kconfig
> > > +++ b/drivers/phy/Kconfig
> > > @@ -15,6 +15,11 @@ config GENERIC_PHY
> > >  	  phy users can obtain reference to the PHY. All the users of this
> > >  	  framework should select this config.
> > >  
> > > +config PHY_BERLIN_SATA
> > > +	bool
> > 
> > Is there any real reason why this cannot be tristate?
> 
> What we have seen with SATA drivers and phys, is there is link time
> breakage if the SATA driver is built in and the phy is modular.
> 
> Maybe this has been fixed now? 

Using tristate shouldn't be a problem. I compiled without the PHY
driver, no link issue.

Antoine

-- 
Antoine Ténart, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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