linux-kernel - RE: [PATCH 0/7] USB: PHY: Tegra: registering TEGRA USB PHY as platform driver

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Date:	Wed, 20 Mar 2013 17:42:56 +0530
From:	Venu Byravarasu <vbyravarasu@...dia.com>
To:	Stephen Warren <swarren@...dotorg.org>
CC:	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"stern@...land.harvard.edu" <stern@...land.harvard.edu>,
	"balbi@...com" <balbi@...com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>,
	"devicetree-discuss@...ts.ozlabs.org" 
	<devicetree-discuss@...ts.ozlabs.org>
Subject: RE: [PATCH 0/7] USB: PHY: Tegra: registering TEGRA USB PHY as
 platform driver

> -----Original Message-----
> From: Venu Byravarasu
> Sent: Wednesday, March 20, 2013 11:30 AM
> To: 'Stephen Warren'
> Cc: gregkh@...uxfoundation.org; stern@...land.harvard.edu;
> balbi@...com; linux-usb@...r.kernel.org; linux-kernel@...r.kernel.org;
> linux-tegra@...r.kernel.org; devicetree-discuss@...ts.ozlabs.org
> Subject: RE: [PATCH 0/7] USB: PHY: Tegra: registering TEGRA USB PHY as
> platform driver
> 
> > -----Original Message-----
> > From: Stephen Warren [mailto:swarren@...dotorg.org]
> > Sent: Wednesday, March 20, 2013 1:22 AM
> > To: Venu Byravarasu
> > Cc: gregkh@...uxfoundation.org; stern@...land.harvard.edu;
> > balbi@...com; linux-usb@...r.kernel.org; linux-kernel@...r.kernel.org;
> > linux-tegra@...r.kernel.org; devicetree-discuss@...ts.ozlabs.org
> > Subject: Re: [PATCH 0/7] USB: PHY: Tegra: registering TEGRA USB PHY as
> > platform driver
> >
> > On 03/18/2013 06:29 AM, Venu Byravarasu wrote:
> > > As part of this series, apart from patch containing changes to register
> > TEGRA
> > > USB PHY driver as platform driver, prepared below patches:
> > > 1. Re-arranging & adding new DT properties.
> > > 2. Getting various params from DT properties added.
> > > 3. code clean up.
> >
> > Venu, I'm curious whether these patches were tested at all. I have found
> > at least two significant problems with trivial testing:
> 
> Stephen,
> Initially started testing after applying each and every patch.
> Like that tested till first 5 patches.
> As did not see any issues till then, applied rest 2 patches at once and tested
> with that.
> Though did not see mouse getting vbus on the 1st boot, Vbus was coming
> fine after disconnect and connect.
> Hence did not test thereafter.
> 
> After checking your current mail, tried now and observed that there seems to
> be some real issue with patch#7 only. (As tried now after applying till patch#
> 6 and did not see this issue).
> Will debug further on patch#7 and update with proper fix after addressing
> your other comments.

Debugged further and found that the issue is because of http://marc.info/?l=linux-arm-kernel&m=135890098024987&w=2 
On reverting that patch and applying it on top of patch#7, able to see  enumeration working fine.

Anyhow, will take care of your other comments and merge this change with patch#7 and resend
for review.

> 
> Thanks for the review & heads up,
> venu
> 
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