RE: [PATCH 1/7 v2] USB: EHCI: Add Marvell Host Controller driver

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Hi Alan,

> -----Original Message-----
> From: Alan Stern [mailto:stern@xxxxxxxxxxxxxxxxxxx]
> Sent: 2011年12月7日 23:42
> To: Felipe Balbi
> Cc: Neil Zhang; gregkh@xxxxxxx; USB list; Chao Xie
> Subject: Re: [PATCH 1/7 v2] USB: EHCI: Add Marvell Host Controller
> driver
> 
> On Wed, 7 Dec 2011, Felipe Balbi wrote:
> 
> > Hi,
> >
> > On Wed, Nov 30, 2011 at 09:57:11AM +0800, Neil Zhang wrote:
> > > This patch adds support for EHCI compliant HSUSB Host controller
> found
> > > on Marvell Socs.
> > >
> > > It fits both OTG and SPH controller on marvell Socs, including
> > > PXA920/MMP2/MMP3/MGx.
> > >
> > > Signed-off-by: Neil Zhang <zhangwm@xxxxxxxxxxx>
> > > ---
> >
> > This is Alan's territory. Alan, any comments ?
> 
> > > --- a/drivers/usb/host/Kconfig
> > > +++ b/drivers/usb/host/Kconfig
> > > @@ -194,6 +194,15 @@ config USB_EHCI_S5P
> > >         help
> > >  	 Enable support for the S5P SOC's on-chip EHCI controller.
> > >
> > > +config USB_EHCI_PXA
> > > +	bool "EHCI support for PXA USB SPH and OTG controller"
> > > +	depends on USB_EHCI_HCD
> > > +	select USB_EHCI_ROOT_HUB_TT
> > > +	---help---
> > > +	  Enables support for PXA USB SPH and OTG controller. SPH is a
> > > +	  single port host, and it can only be EHCI host. OTG is
> controller
> > > +	  that can switch to be host mode.
> > > +
> > >  config USB_W90X900_EHCI
> > >  	bool "W90X900(W90P910) EHCI support"
> > >  	depends on USB_EHCI_HCD && ARCH_W90X900
> > > diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-
> hcd.c
> > > index 3ff9f82..4eb19f8 100644
> > > --- a/drivers/usb/host/ehci-hcd.c
> > > +++ b/drivers/usb/host/ehci-hcd.c
> > > @@ -1329,6 +1329,11 @@ MODULE_LICENSE ("GPL");
> > >  #define PLATFORM_DRIVER		ehci_xls_driver
> > >  #endif
> > >
> > > +#ifdef CONFIG_USB_EHCI_PXA
> > > +#include "ehci-mv.c"
> > > +#define	PLATFORM_DRIVER		mv_ehci_driver
> > > +#endif
> > > +
> 
> If this is a PXA driver, why is it named "ehci-mv.c"?  Why not
> "ehci-pxamv.c" or something like that?
> 
> Also, I'm a little concerned by the fact that we already have
> CONFIG_USB_PXA168_EHCI and ehci-pxa168.c.  Adding CONFIG_USB_EHCI_PXA
> could lead to a lot of confusion.
> 
Actually, Marvell PXA and MMP serial all use the same USB IP and this driver is going to fit all of them.
So is it OK if I change CONFIG_USB_EHCI_PXA to CONFIG_USB_EHCI_MV and will add some more info in Kconfig.

> Apart from that, the patch looks okay.
> 
> Alan Stern

Best Regards,
Neil Zhang
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