linux-kernel - Re: [PATCH v3 4/4] usb: dwc2: refactor common low-level hw code to platform.c

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Message-ID: <20151001220355.GB32355@saruman.tx.rr.com>
Date:	Thu, 1 Oct 2015 17:03:55 -0500
From:	Felipe Balbi <balbi@...com>
To:	John Youn <John.Youn@...opsys.com>
CC:	"balbi@...com" <balbi@...com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>,
	Robert Baldyga <r.baldyga@...sung.com>,
	Krzysztof Kozlowski <k.kozlowski@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Subject: Re: [PATCH v3 4/4] usb: dwc2: refactor common low-level hw code to
 platform.c

On Thu, Oct 01, 2015 at 09:04:59PM +0000, John Youn wrote:
> On 10/1/2015 8:50 AM, Felipe Balbi wrote:
> > On Mon, Sep 21, 2015 at 12:16:12PM +0200, Marek Szyprowski wrote:
> >> DWC2 module on some platforms needs three additional hardware
> >> resources: phy controller, clock and power supply. All of them must be
> >> enabled/activated to properly initialize and operate. This was initially
> >> handled in s3c-hsotg driver, which has been converted to 'gadget' part
> >> of dwc2 driver. Unfortunately, not all of this code got moved to common
> >> platform code, what resulted in accessing DWC2 registers without
> >> enabling low-level hardware resources. This fails for example on Exynos
> >> SoCs. This patch moves all the code for managing those resources to
> >> common platform.c file and provides convenient wrappers for controlling
> >> them.
> >>
> >> Signed-off-by: Marek Szyprowski <m.szyprowski@...sung.com>
> > 
> > I just caught several build errors which this patch. I hope you can
> > send me a follow-up fix (which I can amend to $subject) otherwise
> > I'll have to drop this series
> > 
> 
> I forgot that this was initially part of a larger
> patch-set. Maybe that is causing issues? If this wasn't intended
> to go through Felipe's tree then my bad.
> 
> Also, I noticed this patch causes deadlock warnings with lockdep
> enabled.
> 
> Can you look into that also while you investigate this?

John, do you want me to drop the series meanwhile ? I can do that no problems.

-- 
balbi

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