linux-kernel - RE: [PATCH 2/3][v3] drivers: usb: dwc3: Add frame length adjustment quirk

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Date:	Thu, 3 Sep 2015 17:28:18 +0000
From:	Badola Nikhil <nikhil.badola@...escale.com>
To:	"balbi@...com" <balbi@...com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
Subject: RE: [PATCH 2/3][v3] drivers: usb: dwc3: Add frame length adjustment
 quirk

> -----Original Message-----
> From: Felipe Balbi [mailto:balbi@...com]
> Sent: Thursday, September 03, 2015 9:25 PM
> To: Badola Nikhil-B46172 <nikhil.badola@...escale.com>
> Cc: linux-kernel@...r.kernel.org; linux-usb@...r.kernel.org; linux-
> omap@...r.kernel.org; balbi@...com; gregkh@...uxfoundation.org
> Subject: Re: [PATCH 2/3][v3] drivers: usb: dwc3: Add frame length
> adjustment quirk
> 
> On Thu, Sep 03, 2015 at 11:34:04AM +0530, Nikhil Badola wrote:
> > Add adjust_frame_length_quirk for writing to fladj register which
> > adjusts (micro)frame length to value provided by
> > "snps,quirk-frame-length-adjustment" property thus avoiding USB 2.0
> > devices to time-out over a longer run
> >
> > Signed-off-by: Nikhil Badola <nikhil.badola@...escale.com>
> > ---
> > Changes for v3:
> > 	- removed unnecessary if(fladj) condition
> > 	- removed stray newline
> >
> >  drivers/usb/dwc3/core.c          | 34
> ++++++++++++++++++++++++++++++++++
> >  drivers/usb/dwc3/core.h          |  5 +++++
> >  drivers/usb/dwc3/platform_data.h |  2 ++
> >  3 files changed, 41 insertions(+)
> >
> > diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c index
> > 064123e..75a17bf 100644
> > --- a/drivers/usb/dwc3/core.c
> > +++ b/drivers/usb/dwc3/core.c
> > @@ -143,6 +143,32 @@ static int dwc3_soft_reset(struct dwc3 *dwc)
> >  	return 0;
> >  }
> >
> > +/*
> > + * dwc3_frame_length_adjustment - Adjusts frame length if required
> > + * @dwc3: Pointer to our controller context structure
> > + * @fladj: Value of GFLADJ_30MHZ to adjust frame length  */ static
> > +void dwc3_frame_length_adjustment(struct dwc3 *dwc, u32 fladj) {
> > +	if (dwc->revision < DWC3_REVISION_250A)
> > +		return;
> > +
> > +	if (fladj == 0)
> > +		return;
> > +
> > +	u32 reg;
> > +	u32 dft;
> 
> are you seriously telling me that GCC didn't warn you about mixing
> declaration and code ?

That's really careless of me.  Somehow this warning skipped my attention.
Apologies for this silly thing. I will resend the patch.

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