linux-kernel - Re: [PATCH v3 10/30] USB: ehci-omap: Use PHY APIs to get the PHY device and put it out of suspend

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Date:	Tue, 29 Jan 2013 12:08:23 +0200
From:	Roger Quadros <rogerq@...com>
To:	<balbi@...com>
CC:	<tony@...mide.com>, <stern@...land.harvard.edu>,
	<linux@....linux.org.uk>, <sameo@...ux.intel.com>,
	<gregkh@...uxfoundation.org>, <eballetbo@...il.com>,
	<javier@...hile0.org>, <sshtylyov@...sta.com>,
	<linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v3 10/30] USB: ehci-omap: Use PHY APIs to get the PHY
 device and put it out of suspend

On 01/29/2013 11:57 AM, Felipe Balbi wrote:
> Hi,
> 
> On Tue, Jan 29, 2013 at 11:50:32AM +0200, Roger Quadros wrote:
>> For each port that is in PHY mode we obtain a PHY device using the USB PHY
>> library and put it out of suspend.
>>
>> It is up to platform code to associate the PHY to the controller's
>> port and it is upto the PHY driver to manage the PHY's resources.
>>
>> Also remove wired spacing around declarations we come across.
>>
>> Signed-off-by: Roger Quadros <rogerq@...com>
> 
> ideally, this would be done generically by ehci-hcd.ko itself. Alan,
> would you have objections provided it doesn't break anyone else ?
> 
Agreed, and PHY suspend/resume should be done at port granularity.

But considering the erratas we have in OMAP EHCI, I would still prefer to
have control of the PHY in ehci-omap. We might even have to do some ULPI
transfers in certain scenarios to work around some of the erratas.

cheers,
-roger
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