Messages in this thread Patch in this message | | | Date | Tue, 24 Apr 2012 15:33:23 -0700 | From | Greg KH <> | Subject | [ 42/62] usb: gadget: udc-core: stop UDC on device-initiated disconnect |
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3.3-stable review patch. If anyone has any objections, please let me know.
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From: Felipe Balbi <balbi@ti.com>
commit 6d258a4c42089229b855fd706622029decf316d6 upstream.
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.
Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- drivers/usb/gadget/udc-core.c | 4 ++++ 1 file changed, 4 insertions(+)
--- a/drivers/usb/gadget/udc-core.c +++ b/drivers/usb/gadget/udc-core.c @@ -359,8 +359,12 @@ static ssize_t usb_udc_softconn_store(st 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);
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