Subject: Re: [PATCH 5/7] IBM Akebono: Add support to the EHCI platform driver for Akebono

From: Benjamin Herrenschmidt <[email-masked]>
Date: Wed, 06 Nov 2013 06:52:13 +1100

On Tue, 2013-11-05 at 10:04 -0500, Alan Stern wrote:
> On Tue, 5 Nov 2013, Alistair Popple wrote:
> 
> > The IBM Akebono board has an EHCI compliant USB host interface. This
> > patch adds support for it to the EHCI platform driver.
> > 
> > Signed-off-by: Alistair Popple <[email-masked]>
> > Cc: Alan Stern <[email-masked]>
> > Cc: [email-masked]
> > ---
> >  drivers/usb/host/ehci-platform.c |    5 +++--
> >  1 file changed, 3 insertions(+), 2 deletions(-)
> > 
> > diff --git a/drivers/usb/host/ehci-platform.c b/drivers/usb/host/ehci-platform.c
> > index f6b790c..0a67616 100644
> > --- a/drivers/usb/host/ehci-platform.c
> > +++ b/drivers/usb/host/ehci-platform.c
> > @@ -203,9 +203,10 @@ static int ehci_platform_resume(struct device *dev)
> >  #define ehci_platform_resume	NULL
> >  #endif /* CONFIG_PM */
> >  
> > -static const struct of_device_id vt8500_ehci_ids[] = {
> > +static const struct of_device_id ehci_platform_ids[] = {
> >  	{ .compatible = "via,vt8500-ehci", },
> >  	{ .compatible = "wm,prizm-ehci", },
> > +	{ .compatible = "ibm,akebono-ehci", },
> >  	{}
> >  };

Why ? Do we need to add an entry for every platform in there ? Besides,
it probably should be the SoC name not the platform here....

Why not simply a generic compatible "usb-ehci" ? It's a standard
programming interface, there are no specific quirks, we shouldn't
need to have to add new entries to the driver like that for every
new SoC/platform.

> > @@ -229,7 +230,7 @@ static struct platform_driver ehci_platform_driver = {
> >  		.owner	= THIS_MODULE,
> >  		.name	= "ehci-platform",
> >  		.pm	= &ehci_platform_pm_ops,
> > -		.of_match_table = vt8500_ehci_ids,
> > +		.of_match_table = ehci_platform_ids,
> >  	}
> >  };
> 
> Acked-by: Alan Stern <[email-masked]>
> 
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