Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755519AbdGKKZi (ORCPT ); Tue, 11 Jul 2017 06:25:38 -0400 Received: from us01smtprelay-2.synopsys.com ([198.182.60.111]:45783 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752361AbdGKKZg (ORCPT ); Tue, 11 Jul 2017 06:25:36 -0400 Date: Tue, 11 Jul 2017 14:25:13 +0400 From: Minas Harutyunyan Subject: [PATCH] usb: dwc2: gadget: On USB RESET reset device address to zero To: John Youn , Felipe Balbi , "Greg Kroah-Hartman" , , CC: Minas Harutyunyan MIME-Version: 1.0 Content-Type: text/plain Message-ID: X-Originating-IP: [10.13.184.19] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 852 Lines: 27 Reseted DEVADDR field in DCFG to zero on USB RESET. Device address in DCFG register does not reset to zero, which required to pass enumeration, after disconnect and reconnect. Signed-off-by: Minas Harutyunyan --- drivers/usb/dwc2/gadget.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c index 98a4a79e7f6e..c5c0a26a4d66 100644 --- a/drivers/usb/dwc2/gadget.c +++ b/drivers/usb/dwc2/gadget.c @@ -3561,6 +3561,9 @@ static irqreturn_t dwc2_hsotg_irq(int irq, void *pw) /* Report disconnection if it is not already done. */ dwc2_hsotg_disconnect(hsotg); + /* Reset device address to zero */ + __bic32(hsotg->regs + DCFG, DCFG_DEVADDR_MASK); + if (usb_status & GOTGCTL_BSESVLD && connected) dwc2_hsotg_core_init_disconnected(hsotg, true); } -- 2.11.0