Hello, 2015-01-13 9:10 GMT+03:00 Kishon Vijay Abraham I <kishon@xxxxxx>: > Hi, > > On Tuesday 13 January 2015 03:21 AM, Felipe Balbi wrote: >> On Sun, Jan 11, 2015 at 10:44:59PM +0400, Dmitry Eremin-Solenikov wrote: >>> Hello, >>> >>> 2015-01-08 19:58 GMT+03:00 Felipe Balbi <balbi@xxxxxx>: >>>> On Sun, Nov 30, 2014 at 01:02:04AM +0300, Dmitry Eremin-Solenikov wrote: >>>>> Extract lubbock-specific code from pxa25x_udc driver. As a bonus, phy >>>>> driver determines connector/VBUS status by reading CPLD register. Also >>>>> it uses a work to call into udc stack, instead of pinging vbus session >>>>> right from irq handler. >>>>> >>>>> Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@xxxxxxxxx> >>>>> --- >>>>> drivers/usb/phy/Kconfig | 10 ++ >>>>> drivers/usb/phy/Makefile | 1 + >>>> >>>> new phy drivers under drivers/phy only, sorry. >>> >>> Hmm. How do drivers/phy drivers coordinate with usb gadget subsystem? >>> I see none of them calling usb_gadget_vbus_connect/disconnect(). >> >> I'll leave that to Kishon, since he wrote drivers/phy. Kishon, any >> hints? > > Extcon framework can be used to detect the connector status. So the PHY driver > should register with the extcon framework if it has the capability to determine > the connector status and the gadget driver should register with the extcon > framework if it has to receive the connector status. If I understand correctly, this means the whole usb gadget/otg subsystem needs to be redesigned/refactored to support extconn drivers. Is it planned already? Can we still submit drivers to an old usb-phy subsystem as 'new phy' subsystem does not provide us necessary integration with usb-gadget subsystem? > > I'm not sure if we should be adding these extcon APIs inside the PHY framework > itself as all PHYs might not have the capability to detect the connector status. In fact I have several devices for which I had to implement a simple usb-phy that is able to control D+ pullup, but isn't able to detect VBUS presense and thus has to assume that the device is always connected. -- With best wishes Dmitry -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
