linux-kernel - Re: [PATCH 2/2] arm: omap: remove *.auto* from device names given in usb_bind

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Date:	Mon, 29 Jul 2013 20:54:13 +0300
From:	Felipe Balbi <balbi@...com>
To:	Kishon Vijay Abraham I <kishon@...com>
CC:	<balbi@...com>, <tony@...mide.com>, <linux@....linux.org.uk>,
	<eballetbo@...il.com>, <javier@...hile0.org>,
	<gregkh@...uxfoundation.org>, <linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <linux-usb@...r.kernel.org>
Subject: Re: [PATCH 2/2] arm: omap: remove *.auto* from device names given in
 usb_bind_phy

Hi,

On Mon, Jul 29, 2013 at 08:59:26PM +0530, Kishon Vijay Abraham I wrote:
> >> Previously MUSB wrapper (OMAP) device used PLATFORM_DEVID_AUTO while creating
> >> MUSB core device. So in usb_bind_phy (binds the controller with the PHY), the
> >> device name of the controller had *.auto* in it. Since with using
> >> PLATFORM_DEVID_AUTO, there is no way to know the exact device name in advance,
> >> the data given in usb_bind_phy became obsolete and usb_get_phy was failing.
> >> So MUSB wrapper was modified not to use PLATFORM_DEVID_AUTO. Corresponding
> >> change is done in board file here.
> >>
> >> Signed-off-by: Kishon Vijay Abraham I <kishon@...com>
> >> ---
> >>  arch/arm/mach-omap2/board-2430sdp.c          |    2 +-
> >>  arch/arm/mach-omap2/board-3430sdp.c          |    2 +-
> >>  arch/arm/mach-omap2/board-cm-t35.c           |    2 +-
> >>  arch/arm/mach-omap2/board-devkit8000.c       |    2 +-
> >>  arch/arm/mach-omap2/board-igep0020.c         |    2 +-
> >>  arch/arm/mach-omap2/board-ldp.c              |    2 +-
> >>  arch/arm/mach-omap2/board-omap3beagle.c      |    2 +-
> >>  arch/arm/mach-omap2/board-omap3evm.c         |    2 +-
> >>  arch/arm/mach-omap2/board-omap3logic.c       |    2 +-
> >>  arch/arm/mach-omap2/board-omap3pandora.c     |    2 +-
> >>  arch/arm/mach-omap2/board-omap3stalker.c     |    2 +-
> >>  arch/arm/mach-omap2/board-omap3touchbook.c   |    2 +-
> >>  arch/arm/mach-omap2/board-overo.c            |    2 +-
> >>  arch/arm/mach-omap2/board-rm680.c            |    2 +-
> >>  arch/arm/mach-omap2/board-rx51.c             |    2 +-
> >>  arch/arm/mach-omap2/board-zoom-peripherals.c |    2 +-
> >>  16 files changed, 16 insertions(+), 16 deletions(-)
> >>
> >> diff --git a/arch/arm/mach-omap2/board-2430sdp.c b/arch/arm/mach-omap2/board-2430sdp.c
> >> index 244d8a5..17bb076 100644
> >> --- a/arch/arm/mach-omap2/board-2430sdp.c
> >> +++ b/arch/arm/mach-omap2/board-2430sdp.c
> >> @@ -233,7 +233,7 @@ static void __init omap_2430sdp_init(void)
> >>  	omap_hsmmc_init(mmc);
> >>  
> >>  	omap_mux_init_signal("usb0hs_stp", OMAP_PULL_ENA | OMAP_PULL_UP);
> >> -	usb_bind_phy("musb-hdrc.0.auto", 0, "twl4030_usb");
> >> +	usb_bind_phy("musb-hdrc.0", 0, "twl4030_usb");
> > 
> > how about moving usb_bind_phy() calls to omap2430.c ?
> > 
> > diff --git a/drivers/usb/musb/omap2430.c b/drivers/usb/musb/omap2430.c
> > index f44e8b5..b6abc1a 100644
> > --- a/drivers/usb/musb/omap2430.c
> > +++ b/drivers/usb/musb/omap2430.c
> > @@ -544,6 +544,9 @@ static int omap2430_probe(struct platform_device *pdev)
> >  
> >  		pdata->board_data	= data;
> >  		pdata->config		= config;
> > +	} else {
> > +		/* bind the PHY */
> > +		usb_bind_phy(dev_name(&musb->dev), 0, "twl4030_usb");
> 
> This looks like a hack IMHO to workaround the usb phy library. otherwise it is
> similar to get_phy_by_name.

actually, this is a workaround to the fact that we're not creating all
platform_devices in arch/arm/mach-omap2/ :-)

If we had the musb allocation there, we could easily handle
usb_bind_phy()

> > so that's temporary. It might be better than to reintroduce the IDR in
> > musb_core.c.
> 
> that’s needed for generic phy framework anyway :-s

right, but generic phy framework can handle everything just fine, the
only problem is that names are changing.

-- 
balbi

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