From 6d258a4c42089229b855fd706622029decf316d6 Mon Sep 17 00:00:00 2001
From: Felipe Balbi <balbi@ti.com>
Date: Thu, 15 Mar 2012 16:37:18 +0200
Subject: [PATCH] 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: Felipe Balbi <balbi@ti.com>
---
drivers/usb/gadget/udc-core.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c
index 56da49f31d6c..c261887e05ae 100644
--- a/drivers/usb/gadget/udc-core.c
+++ b/drivers/usb/gadget/udc-core.c
@@ -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);
--
2.34.1