linux-kernel - Re: [PATCH RFC 1/4] phy: Add new Exynos5 USB 3.0 PHY driver

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Date:	Mon, 4 Nov 2013 18:39:00 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	Tomasz Figa <t.figa@...sung.com>
CC:	Vivek Gautam <gautam.vivek@...sung.com>,
	<linux-usb@...r.kernel.org>, <linux-samsung-soc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-doc@...r.kernel.org>, <gregkh@...uxfoundation.org>,
	<kgene.kim@...sung.com>, <k.debski@...sung.com>,
	<s.nawrocki@...sung.com>, <balbi@...com>, <jwerner@...omium.org>,
	<jg1.han@...sung.com>
Subject: Re: [PATCH RFC 1/4] phy: Add new Exynos5 USB 3.0 PHY driver

On Monday 04 November 2013 05:56 PM, Tomasz Figa wrote:
> Hi Kishon,
>
> On Monday 04 of November 2013 12:24:42 Kishon Vijay Abraham I wrote:
>> Hi Vivek,
>>
>> On Thursday 31 October 2013 01:15 PM, Vivek Gautam wrote:
>>> Add a new driver for the USB 3.0 PHY on Exynos5 series of SoCs.
>>> The new driver uses the generic PHY framework and will interact
>>> with DWC3 controller present on Exynos5 series of SoCs.
>>
>> In Exynos, you have a single IP that supports both USB3 and USB2 PHY
>> right? I think that needs to be mentioned here.
>
> Nope. There are two separate, different IPs.

Alright. Thanks for the clarification.

Cheers
Kishon

>
>> Do you have separate registers that should be used for
>> initializing/powerin_on/powering_off etc.. for usb2 phy and usb3 phy? If
>> so, then you should model this driver as a single driver that supports
>> two PHYs similar to what Sylwester has done before?
>
> Sylwester's MIPI PHY uses such model because it has a single register
> that controls both PHYs.
>
> Best regards,
> Tomasz
>

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