[PATCH v3 4/4] musb: sunxi: Simplify dr_mode handling

Maxime Ripard maxime.ripard at free-electrons.com
Wed Jun 15 12:30:23 PDT 2016


On Wed, Jun 08, 2016 at 12:30:20PM +0200, Hans de Goede wrote:
> Hi,
> On 08-06-16 12:23, Maxime Ripard wrote:
> >Hi,
> >
> >On Sun, Jun 05, 2016 at 04:59:36PM +0200, Hans de Goede wrote:
> >>phy-sun4i-usb now has proper dr_mode handling, it always registers an
> >>extcon, and sends a notify with the mode (even when in peripheral- /
> >>host-only mode) at least once.
> >>
> >>So we can simply the sunxi musb glue by always registering its extcon
> >>notifier and relying on sunxi_musb_work() to enable vbus when in
> >>host-only mode.
> >>
> >>This also enables host- and peripheral-only mode with vbus monitoring.
> >>
> >>Signed-off-by: Hans de Goede <hdegoede at redhat.com>
> >
> >It's been a bit painful to track all the patches needed so that it
> >applies properly, but I've finally been able to test it on a Sinlinx
> >SinA33 with peripheral-only mUSB, and it works like a charm.
> >
> >You can add my Tested-by.
> Great, thanks for testing.
> This is the board which has an otg connector with vbus not connected,
> right? Yet it does have a functional id-pin, right ?

It's that one, yes.

> In that case you should be able to put it in dual-role mode (only
> specify the id-pin in the phy dts node, no vbus / vbus-monitoring)
> and then it _should_ work in host mode if you use a powered hub.
> I'm fine with putting in peripheral-only mode, but as said
> dual-role might work with a powered hub.

Good point, I'll test that.


Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
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