linux-kernel - Re: [PATCH] USB: ohci-omap: defer probe if PHY is missing

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Message-ID: <20170103185031.viic6w5tzshb7mt5@raspberrypi-2.musicnaut.iki.fi>
Date:   Tue, 3 Jan 2017 20:50:31 +0200
From:   Aaro Koskinen <aaro.koskinen@....fi>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Alan Stern <stern@...land.harvard.edu>,
        Felipe Balbi <balbi@...nel.org>, linux-usb@...r.kernel.org,
        linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] USB: ohci-omap: defer probe if PHY is missing

Hi,

On Tue, Jan 03, 2017 at 05:51:43PM +0100, Greg Kroah-Hartman wrote:
> On Mon, Jan 02, 2017 at 10:53:55PM +0200, Aaro Koskinen wrote:
> > Defer probe if PHY is missing. E.g. on Nokia 770 several modules needs
> > to be loaded to get the PHY going and ohci-omap should wait for those.
> > 
> > Signed-off-by: Aaro Koskinen <aaro.koskinen@....fi>
> 
> Is this a new bug?  The 770 has been around for forever, why has this
> not been a problem before now?

PHY/OTG support for 770 has been around only since v3.14. I was previously
compiling phy-tahvo as built-in, and bumped into this issue when compiling
it as a module.

A.