Re: Multiple generic PHY instances for DWC3 USB IP

From: Masahiro Yamada
Date: Wed Apr 04 2018 - 06:34:15 EST

Hi Arnd,

2018-04-04 17:43 GMT+09:00 Arnd Bergmann <arnd@xxxxxxxx>:
> On Wed, Apr 4, 2018 at 10:00 AM, Felipe Balbi
> <felipe.balbi@xxxxxxxxxxxxxxx> wrote:
>> Hi,
>> Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx> writes:
>>>>> Each DWC3 instance is connected with
>>>>> multiple HS PHYs and multiple SS PHYs,
>>>>> depending on the number of ports.
>>>> in that case, you shouldn't need dwc3 at all. A Host-only dwc3 is xHCI
>>>> compliant. If you really don't have the gadget block, there's no need
>>>> for you to use dwc3. Just use xhci-plat directly.
>>> Sorry, I was misunderstanding.
>>> Some of our SoCs support gadget,
>>> so we need to use the dwc3 driver.
>> fair enough. Now we need to figure out how to pass multiply PHYs to a
>> multi-port dwc3 instance.
>> Kishon, any ideas? How do you think DT should look like?
> See this series from Martin Blumenstingl:
> Arnd

Very useful information!

Not tested yet, but I quickly reviewed the series visually,
and probably this will work for us.


Best Regards
Masahiro Yamada