linux-kernel - Re: [PATCH 4/8] usb: phy: fix isp1301-omap dependency on tps65010

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Date:	Tue, 13 May 2014 14:52:16 -0500
From:	Felipe Balbi <balbi@...com>
To:	Arnd Bergmann <arnd@...db.de>
CC:	<linux-arm-kernel@...ts.infradead.org>, <balbi@...com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-omap@...r.kernel.org>
Subject: Re: [PATCH 4/8] usb: phy: fix isp1301-omap dependency on tps65010

Hi,

On Tue, May 13, 2014 at 09:48:27PM +0200, Arnd Bergmann wrote:
> On Tuesday 13 May 2014 10:26:31 Felipe Balbi wrote:
> > On Thu, May 08, 2014 at 03:52:17PM +0200, Arnd Bergmann wrote:
> > > The isp1301-omap driver cannot be built-in if the tps65010 driver
> > > is a module, otherwise we get a link error from the reference to
> > > the tps65010_set_vbus_draw function.
> > > 
> > > There is already a hack in the driver to work around the problem
> > > of tps65010 being not available at all. This patch extends that
> > > hack to ensure that the real tps65010_set_vbus_draw() function
> > > is only called when it's avaiable.
> > > 
> > > Signed-off-by: Arnd Bergmann <arnd@...db.de>
> > > Cc: linux-omap@...r.kernel.org
> > > ---
> > >  drivers/usb/phy/phy-isp1301-omap.c | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > > 
> > > diff --git a/drivers/usb/phy/phy-isp1301-omap.c b/drivers/usb/phy/phy-isp1301-omap.c
> > > index 6e146d7..35a0dd2 100644
> > > --- a/drivers/usb/phy/phy-isp1301-omap.c
> > > +++ b/drivers/usb/phy/phy-isp1301-omap.c
> > > @@ -94,7 +94,7 @@ struct isp1301 {
> > >  
> > >  #if defined(CONFIG_MACH_OMAP_H2) || defined(CONFIG_MACH_OMAP_H3)
> > >  
> > > -#if  defined(CONFIG_TPS65010) || defined(CONFIG_TPS65010_MODULE)
> > > +#if  defined(CONFIG_TPS65010) || (defined(CONFIG_TPS65010_MODULE) && defined(MODULE))
> > 
> > nack, I would rather see a real fix, possibly also fixing the original
> > hack.
> 
> Any suggestion how?

well, that driver shouldn't depend on a particular PMIC. It should use
regulator framework to enable and disable vbus regulator, to start with.

In fact, isp1301-omap.c shouldn't even exist. isp1301 is a generic
device and not OMAP-specific.

cheers

-- 
balbi

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