usb: multi phy support

usb: multi phy support

[Mohammed, Afzal]

Hi Felipe,

AM335x SoC's used in boards like beagle bone has two instances of USB
modules (2.0) at the hardware level, each having a dedicated phy.
Currently in mainline, only one instance of USB is supported
(including a fix in your latest pull request). To support multi
instance, the biggest obstacle is lack of multi phy support for
usb phy's of same type.

Earlier Kishon was working on usb phy device tree support, later it was
seen that generic phy layer was preferred. And Kishon posted a couple of
versions on generic phy framework, latest being on 26th September 2012,
but I could not see follow up's on that series.

It seems Kishon is not now working on generic phy support. Let me know
your opinion/suggestions on supporting usb phy's of same type. We are
trying to get multi USB instance support in mainline for AM335x.

Regards
Afzal

Re: usb: multi phy support

[Felipe Balbi]

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Hi,

On Mon, Jan 07, 2013 at 12:57:15PM +0100, Mohammed, Afzal wrote:
> AM335x SoC's used in boards like beagle bone has two instances of USB
> modules (2.0) at the hardware level, each having a dedicated phy.
> Currently in mainline, only one instance of USB is supported
> (including a fix in your latest pull request). To support multi
> instance, the biggest obstacle is lack of multi phy support for
> usb phy's of same type.
> 
> Earlier Kishon was working on usb phy device tree support, later it was
> seen that generic phy layer was preferred. And Kishon posted a couple of
> versions on generic phy framework, latest being on 26th September 2012,
> but I could not see follow up's on that series.
> 
> It seems Kishon is not now working on generic phy support. Let me know
> your opinion/suggestions on supporting usb phy's of same type. We are
> trying to get multi USB instance support in mainline for AM335x.

Kishon is still working on generic PHY layer indeed. Right Kishon ?

I believe he should be sending some newer version soonish...

-- 
balbi

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Re: usb: multi phy support

[kishon]

Hi,

On Monday 07 January 2013 05:30 PM, Felipe Balbi wrote:
> Hi,
>
> On Mon, Jan 07, 2013 at 12:57:15PM +0100, Mohammed, Afzal wrote:
>> AM335x SoC's used in boards like beagle bone has two instances of USB
>> modules (2.0) at the hardware level, each having a dedicated phy.
>> Currently in mainline, only one instance of USB is supported
>> (including a fix in your latest pull request). To support multi
>> instance, the biggest obstacle is lack of multi phy support for
>> usb phy's of same type.
>>
>> Earlier Kishon was working on usb phy device tree support, later it was
>> seen that generic phy layer was preferred. And Kishon posted a couple of
>> versions on generic phy framework, latest being on 26th September 2012,
>> but I could not see follow up's on that series.
>>
>> It seems Kishon is not now working on generic phy support. Let me know
>> your opinion/suggestions on supporting usb phy's of same type. We are
>> trying to get multi USB instance support in mainline for AM335x.
>
> Kishon is still working on generic PHY layer indeed. Right Kishon ?

Yes. I'll try and send it ASAP.

Thanks
Kishon
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