linux-kernel - Re: [PATCH 0/3] Add picoPHY usb phy driver found on stih407 family SoC's

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Message-ID: <54100E0C.7070309@ti.com>
Date:	Wed, 10 Sep 2014 14:08:36 +0530
From:	Kishon Vijay Abraham I <kishon@...com>
To:	Peter Griffin <peter.griffin@...aro.org>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <srinivas.kandagatla@...il.com>,
	<maxime.coquelin@...com>, <patrice.chotard@...com>,
	<lee.jones@...aro.org>, <devicetree@...r.kernel.org>
Subject: Re: [PATCH 0/3]  Add picoPHY usb phy driver found on stih407 family
 SoC's



On Monday 08 September 2014 09:23 PM, Peter Griffin wrote:
> Hi Kishon,
> 
>> On Wednesday 03 September 2014 03:57 PM, Peter Griffin wrote:
>>> This series adds support for the picoPHY usb phy which is used by the usb2
>>> and usb3 host controllers when controlling usb2/1.1 devices. It is found on
>>> stih407 family SoC's from the consumer electronics devision of STMicroelectronics.
>>
>> So miphy28lp is the PHY controller for USB3 device controller and picoPHY is
>> the PHY controller for USB3 host controller?
> 
> No, miphy28lp is the usb3 phy and picoPHY is the usb2 phy.
> 
> With a usb2 host controller only picoPHY is used. With the usb3 host controller both usb2 and usb3 phys
> are used depending on what type of device is plugged in.
> 
> Hope that clarifies things,

indeed. thanks for the explanation :-)

Cheers
Kishon
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