From: Arnd Bergmann <arnd@arndb.de>
To: Felipe Balbi <felipe.balbi@linux.intel.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>,
Kishon Vijay Abraham I <kishon@ti.com>,
linux-usb@vger.kernel.org, Lee Jones <lee.jones@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
DTML <devicetree@vger.kernel.org>, Andrew Lunn <andrew@lunn.ch>,
Masami Hiramatsu <masami.hiramatsu@linaro.org>,
Jassi Brar <jaswinder.singh@linaro.org>,
Kunihiko Hayashi <hayashi.kunihiko@socionext.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Mathias Nyman <mathias.nyman@linux.intel.com>,
Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Subject: Re: Multiple generic PHY instances for DWC3 USB IP
Date: Wed, 4 Apr 2018 10:43:27 +0200 [thread overview]
Message-ID: <CAK8P3a0t4ooQNJrak_r_Qc2T4UeQB9k3SgStuaBptV2DcA8SBA@mail.gmail.com> (raw)
In-Reply-To: <87woxns8nd.fsf@linux.intel.com>
On Wed, Apr 4, 2018 at 10:00 AM, Felipe Balbi
<felipe.balbi@linux.intel.com> wrote:
>
> Hi,
>
> Masahiro Yamada <yamada.masahiro@socionext.com> 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:
https://www.spinics.net/lists/linux-usb/msg166281.html
Arnd
next prev parent reply other threads:[~2018-04-04 8:43 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-03 13:31 Multiple generic PHY instances for DWC3 USB IP Masahiro Yamada
2018-04-04 5:36 ` Felipe Balbi
2018-04-04 5:56 ` Masahiro Yamada
2018-04-04 6:04 ` Felipe Balbi
2018-04-04 7:31 ` Masahiro Yamada
2018-04-04 8:00 ` Felipe Balbi
2018-04-04 8:43 ` Arnd Bergmann [this message]
2018-04-04 10:33 ` Masahiro Yamada
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