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Commit 6d258a4c authored by Felipe Balbi's avatar Felipe Balbi
Browse files

usb: gadget: udc-core: stop UDC on device-initiated disconnect 



When we want to do device-initiated disconnect,
let's make sure we stop the UDC in order to
e.g. allow lower power states to be achieved by
turning off unnecessary clocks and/or stoping
PHYs.

When reconnecting, call ->udc_start() again to
make sure UDC is reinitialized.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 00341028

drivers/usb/gadget/udc-core.c

+4 −0
Original line number Diff line number Diff line
@@ -411,8 +411,12 @@ static ssize_t usb_udc_softconn_store(struct device *dev, 
	struct usb_udc		*udc = container_of(dev, struct usb_udc, dev);



	if (sysfs_streq(buf, "connect")) {

		if (udc_is_newstyle(udc))

			usb_gadget_udc_start(udc->gadget, udc->driver);

		usb_gadget_connect(udc->gadget);

	} else if (sysfs_streq(buf, "disconnect")) {

		if (udc_is_newstyle(udc))

			usb_gadget_udc_stop(udc->gadget, udc->driver);

		usb_gadget_disconnect(udc->gadget);

	} else {

		dev_err(dev, "unsupported command '%s'\n", buf);