linux-kernel - Re: [PATCH RFC 3/4] xhci: Tune PHY for the DWC3-Exynos host controller

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Message-ID: <CAFp+6iGictwugB2A3ddpW2T7h-eSQ5vkM1RVrWsboGtWE1SkMg@mail.gmail.com>
Date:	Mon, 21 Apr 2014 09:50:47 +0530
From:	Vivek Gautam <gautam.vivek@...sung.com>
To:	Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc:	Linux USB Mailing List <linux-usb@...r.kernel.org>,
	"linux-samsung-soc@...r.kernel.org" 
	<linux-samsung-soc@...r.kernel.org>, linux-omap@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Greg KH <gregkh@...uxfoundation.org>,
	Felipe Balbi <balbi@...com>,
	Kukjin Kim <kgene.kim@...sung.com>, kishon <kishon@...com>,
	Jingoo Han <jg1.han@...sung.com>,
	Julius Werner <jwerner@...omium.org>
Subject: Re: [PATCH RFC 3/4] xhci: Tune PHY for the DWC3-Exynos host controller

Hi,


On Wed, Apr 16, 2014 at 7:42 PM, Heikki Krogerus
<heikki.krogerus@...ux.intel.com> wrote:
> Hi,
>
> On Tue, Apr 15, 2014 at 06:24:11PM +0530, Vivek Gautam wrote:
>> I had seen your patches in the mailing list, but i don't see any
>> updated version of these patches.
>> Are you planning to work on this above mentioned patch-series any time soon ?
>
> I'm sorry, I forgot this completely. I have not prepared new version
> of those patches as the drivers I need them for are not ready yet, but
> I guess I can also use this case as justification for them.
>
>> Or, should i try to find a different approach for handling the phy
>> from the host controller (child of DWC3 in this case, which has the
>> phys).
>
> Well, there is now an issue with the lookup method I'm suggesting in
> this case. Since the device ID is now generated automatically for
> xhci-hcd in dwc3, we don't know the xhci-hcd device name before
> platform_device_add(), and that is too late.

True, the xhci-hcd are getting AUTO ID, so it might not be possible to
get their device
names in dwc3.

> I don't see why the
> device could not be named when platform_device_alloc() is called, so I
> think I'll suggest something like the attached patch to fix this
> issue

Ok, i had a look at the patch, and it looks promising.

>
> In any case, I'll send an updated version of the phy patches soon.

Thanks for your efforts.
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