Messages in this thread | | | Date | Wed, 17 Dec 2014 14:35:30 +0300 | From | Sergei Shtylyov <> | Subject | Re: [PATCH] usb: hcd: add OTG ID signal sensing |
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Hello.
On 12/17/2014 5:08 AM, Peter Chen wrote:
>> On the Renesas R8A7791 SoC based boards there's MAX3355 USB OTG chip and >> mini-AB USB connector corresponding to USB port 0 driven either by EHCI/OHCI >> or Renesas USBHS gadget controller. And we'd like the host/gadget drivers to >> work based on the cable type connected. An 'extcon' driver for MAX3355 has >> been written, so we only need to bind to it via device tree which I'm doing in >> this patch.
>> I wasn't able to find a solution better than checking the cable type at the host >> driver probe time and refusing to drive a host if B-cable is connected.
> You may need a dual-role/otg driver to do it, which can enable host/device function > according to ID pin.
It would have been too good if I had a dual-role controller. :-) But I have what I have. IIUC, such configuration (OHCI and UDC sharing a USB port) has been used on OMAP1.
WBR, Sergei
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