linux-kernel - Re: [PATCH] Revert "usb: host: ehci-msm: Use devm_ioremap_resource instead of devm

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Date:	Tue, 21 Apr 2015 14:18:54 +0300
From:	"Ivan T. Ivanov" <ivan.ivanov@...aro.org>
To:	Vivek Gautam <gautam.vivek@...sung.com>
Cc:	Alan Stern <stern@...land.harvard.edu>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH] Revert "usb: host: ehci-msm: Use devm_ioremap_resource
 instead of devm_ioremap"


On Tue, 2015-04-21 at 16:46 +0530, Vivek Gautam wrote:
> Hi,
> 
> On Tuesday, April 21, 2015 12:41 PM "Ivan T. Ivanov"
> ivanov@...aro.org> wrote:
> > This reverts commit 70843f623b58 ("usb: host: ehci-msm: Use
> > devm_ioremap_resource instead of devm_ioremap"), because msm_otg
> > and this driver are using same address space to access AHB mode
> > and USB command registers.
> > 
> > Cc: Vivek Gautam vivek@...sung.com>
> 
> Since ehci-msm and msm_otg both want to control few USB registers,
> it makes sense to request ioremap'ed region in both drivers.
> 
> Acked-by: Vivek Gautam vivek@...sung.com>
> 
> I can see a patch in mailing list for adding both ehci-host and otg on msm
> [1].
> But I think it has not yet made it to mainline kernel.
> 
> [1] [v3,04/11] ARM: dts: apq8064: Add USB OTG support
> https://patches.linaro.org/47067/

Thanks. Ivan
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