linux-kernel - Re: [PATCH] usb: phy-generic: Don't fail on missing gpio reset

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Date:	Tue, 27 Jan 2015 11:13:08 -0800
From:	Sören Brinkmann <soren.brinkmann@...inx.com>
To:	Felipe Balbi <balbi@...com>
CC:	Andreas Färber <afaerber@...e.de>,
	Michal Simek <michal.simek@...inx.com>,
	<devicetree@...r.kernel.org>,
	Peter Crosthwaite <peter.crosthwaite@...inx.com>,
	Arnd Bergmann <arnd@...db.de>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	Ola Jeppson <ola@...pteva.com>, <linux-gpio@...r.kernel.org>,
	<linux-usb@...r.kernel.org>
Subject: Re: [PATCH] usb: phy-generic: Don't fail on missing gpio reset

On Tue, 2015-01-27 at 09:20AM -0600, Felipe Balbi wrote:
> On Mon, Jan 26, 2015 at 05:45:29PM -0800, Soren Brinkmann wrote:
> > A reset through a GPIO is optional. Don't fail probing when it is
> > missing.
> > 
> > Reported-by: Andreas Färber <afaerber@...e.de>
> > Signed-off-by: Soren Brinkmann <soren.brinkmann@...inx.com>
> > ---
> > Hi Andreas,
> > 
> > does this do the trick?
> > 
> > 	Thanks,
> > 	Sören
> > 
> >  drivers/usb/phy/phy-generic.c | 6 ++----
> >  1 file changed, 2 insertions(+), 4 deletions(-)
> > 
> > diff --git a/drivers/usb/phy/phy-generic.c b/drivers/usb/phy/phy-generic.c
> > index dd05254241fb..a73d4c738f0b 100644
> > --- a/drivers/usb/phy/phy-generic.c
> > +++ b/drivers/usb/phy/phy-generic.c
> > @@ -241,10 +241,8 @@ int usb_phy_gen_create_phy(struct device *dev, struct usb_phy_generic *nop,
> >  
> >  	if (err == -EPROBE_DEFER)
> >  		return -EPROBE_DEFER;
> > -	if (err) {
> > -		dev_err(dev, "Error requesting RESET GPIO\n");
> > -		return err;
> > -	}
> > +	if (err)
> > +		nop->gpiod_reset = NULL;
> 
> there's a better patch to use gpiod_get_optional(), instead.

Great, apparently that wasn't in linux-next yesterday. I'll give it a
shot once it arrives there.

	Sören
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