[linux-sunxi] [PATCH] musb: sunxi: Ignore VBus errors in host-only mode

Olliver Schinagl
2015-09-04T06:43:24Z

Hey Hans,

On 07-08-15 10:45, Olliver Schinagl wrote:
> <snip>
>> If you change the dr_mode to host then you _must_ also remove any
>> id_det and vbus_det
>> gpio settings from the usb_phy node in the dts, as the sun4i phy code
>> detects
>> host vs otg mode by checking for the presence of these.
> Yes, this fixes it and makes it work. Thanks.
>
I've been going back to this and am wondering if this is something I can
look into to fix properly? E.g. if the dts sets dr_mode = host, can we
simply ignore the pins and treat them as unset?

Reason why I'm asking, the board we are using, the Lime2 has all the
stuff required for regular otg mode. The cables however that we connect
to the miniusb however do not force host only mode via the id pin, which
would have been the preferred way. We use a 'shield' for our lime with
various connections and thus have a dts for this shield, which includes
the lime2 dts. In the lime2 dts you want the otg pins enabled and set in
the generic usbphy section.

In my overlay, I ideally don't want to unset the pins, but do want to
set dr_mode (as i can't force it from userspace can I?). The logical
thing in my mind, would be to then just ignore those pins even when set,
right?

Olliver