Re: Renesas RCar device-tree USB series

[Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>]

Hello.

On 03/07/2014 05:30 PM, Ben Dooks wrote:

>>> This is a new series covering enabling the RCar series of SoCs USB
>>> with device-tree based booting. It has been tested on the R8A7790
>>> Lager board.

>>> Improvements from the previous series include:

>>>          - mapping usb to the relevant phy by dt
>>>          - better use of existing pci of functions

>>> Note, there is still an issue with the second gigabyte of memory on
>>> the Lager, which with current kernels causes the system to abort on
>>> startup. This series will only work if the top memory area is disabled.

>> Thanks for these patches. I think they start looking really good.

>> In my mind there are two outstanding issues:

[...]

>> 2) Per-port USB PHY driver configuration via DT
>> Right now each USB host controller points to the same PHY device.
>> Thanks for working on describing the topology! As you know, the PHY
>> driver itself handles several USB ports, and I'd like to use DT to
>> represent the mapping between which PHY port that maps to what USB
>> Host controller to allow proper run time configuration. Right now in
>> this version of the series there is no such mapping. Of course, that
>> depends on proper USB PHY DT bindings...

> Hmm, given the shared phy is shared and referenced counted then
> I don't /think/ there is much more to be done for this. If we add
> more PHYs then I would assume that each one of them would

    It seems you didn't finish the sentence...

WBR, Sergei