linux-kernel - [PATCH v3 3/3] usb: chipidea: register driver as a peripheral with the phy

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Date:	Fri, 20 Nov 2015 15:20:41 -0800
From:	Tim Bird <tim.bird@...ymobile.com>
To:	<Peter.Chen@...escale.com>, <robh+dt@...nel.org>,
	<pawel.moll@....com>, <mark.rutland@....com>
CC:	<gregkh@...uxfoundation.org>, <balbi@...com>,
	<Bjorn.Andersson@...ymobile.com>, <linux-usb@...r.kernel.org>,
	<devicetree@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <tbird20d@...il.com>,
	<tim.bird@...ymobile.com>
Subject: [PATCH v3 3/3] usb: chipidea: register driver as a peripheral with the phy

Register the chipidea driver with the phy, so that the phy
driver can kick the gadget driver when it resumes from low power.
The phy-msm-usb (Qualcomm) driver requires this in order to
recover gadget operation after you disconnect the USB cable
and reconnect it.

Signed-off-by: Tim Bird <tim.bird@...ymobile.com>
---
 drivers/usb/chipidea/udc.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 8223fe7..06234cd 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -1890,6 +1890,12 @@ static int udc_start(struct ci_hdrc *ci)
 
 	ci->gadget.ep0 = &ci->ep0in->ep;
 
+	if (ci->usb_phy) {
+		retval = otg_set_peripheral(ci->usb_phy->otg, &ci->gadget);
+		if (retval)
+			goto destroy_eps;
+	}
+
 	retval = usb_add_gadget_udc(dev, &ci->gadget);
 	if (retval)
 		goto destroy_eps;
-- 
1.8.2.2

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