Re: [RFC] introduce a common ehci_setup

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On Wed, Feb 16, 2011 at 06:18:25PM +0100, castet.matthieu@xxxxxxx wrote:
> Quoting Greg KH <greg@xxxxxxxxx>:
> 
> > On Tue, Feb 15, 2011 at 06:49:07PM +0100, castet.matthieu@xxxxxxx wrote:
> > > This could help to clean platform driver and unify them.
> > >
> > > I Wonder if we should include in the generic setup :
> > >  - ehci->sbrn = 0x20;
> > >  - set of ehci_port_power. What strange is that some driver do
> > > ehci_port_power(ehci, 0) and other ehci_port_power(ehci, 1)
> > >
> > > Matthieu
> > >
> > >
> > > ---
> > >  drivers/usb/host/ehci-atmel.c |   20 ++------------------
> > >  drivers/usb/host/ehci-fsl.c   |   23 ++---------------------
> > >  drivers/usb/host/ehci-hcd.c   |   29 +++++++++++++++++++++++++++++
> > >  drivers/usb/host/ehci-msm.c   |   18 +-----------------
> > >  4 files changed, 34 insertions(+), 56 deletions(-)
> > >
> > > diff --git a/drivers/usb/host/ehci-atmel.c b/drivers/usb/host/ehci-atmel.c
> > > index d6a69d5..559f1a3 100644
> > > --- a/drivers/usb/host/ehci-atmel.c
> > > +++ b/drivers/usb/host/ehci-atmel.c
> > > @@ -53,28 +53,12 @@ static int ehci_atmel_setup(struct usb_hcd *hcd)
> > >  	struct ehci_hcd *ehci = hcd_to_ehci(hcd);
> > >  	int retval = 0;
> > >
> > > -	/* registers start at offset 0x0 */
> > > -	ehci->caps = hcd->regs;
> > > -	ehci->regs = hcd->regs +
> > > -		HC_LENGTH(ehci_readl(ehci, &ehci->caps->hc_capbase));
> > > -	dbg_hcs_params(ehci, "reset");
> > > -	dbg_hcc_params(ehci, "reset");
> > > -
> > > -	/* cache this readonly data; minimize chip reads */
> > > -	ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
> > > -
> > > -	retval = ehci_halt(ehci);
> > > -	if (retval)
> > > -		return retval;
> > > +	ehci->sbrn = 0x20;
> > >
> > > -	/* data structure init */
> > > -	retval = ehci_init(hcd);
> > > +	retval = ehci_setup(hcd);
> >
> > Why not pass in ehci instead of hcd, causing you to back-cast again?
> Because I need hcd pointer to invoke ehci_init.

Ah, I missed that, sorry, you are right.

thanks,

greg k-h
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