From patchwork Tue Aug 28 07:03:08 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Zhao X-Patchwork-Id: 1379361 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id 22B3A3FCAE for ; Tue, 28 Aug 2012 07:09:45 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1T6FsV-00033k-BT; Tue, 28 Aug 2012 07:06:25 +0000 Received: from am1ehsobe001.messaging.microsoft.com ([213.199.154.204] helo=am1outboundpool.messaging.microsoft.com) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1T6Fs5-0002w3-Nz for linux-arm-kernel@lists.infradead.org; Tue, 28 Aug 2012 07:05:58 +0000 Received: from mail100-am1-R.bigfish.com (10.3.201.236) by AM1EHSOBE003.bigfish.com (10.3.204.23) with Microsoft SMTP Server id 14.1.225.23; Tue, 28 Aug 2012 07:05:44 +0000 Received: from mail100-am1 (localhost [127.0.0.1]) by mail100-am1-R.bigfish.com (Postfix) with ESMTP id 2B1813600E0; Tue, 28 Aug 2012 07:05:44 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: 0 X-BigFish: VS0(zzzz1202hzz8275bhz2dh2a8h668h839hd24he5bhf0ah107ah1155h) Received: from mail100-am1 (localhost.localdomain [127.0.0.1]) by mail100-am1 (MessageSwitch) id 1346137541143353_5079; Tue, 28 Aug 2012 07:05:41 +0000 (UTC) Received: from AM1EHSMHS007.bigfish.com (unknown [10.3.201.229]) by mail100-am1.bigfish.com (Postfix) with ESMTP id 1DFC9340046; Tue, 28 Aug 2012 07:05:41 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by AM1EHSMHS007.bigfish.com (10.3.207.107) with Microsoft SMTP Server (TLS) id 14.1.225.23; Tue, 28 Aug 2012 07:05:41 +0000 Received: from az84smr01.freescale.net (10.64.34.197) by 039-SN1MMR1-001.039d.mgd.msft.net (10.84.1.13) with Microsoft SMTP Server (TLS) id 14.2.309.3; Tue, 28 Aug 2012 02:05:38 -0500 Received: from b20223-02.ap.freescale.net (b20223-02.ap.freescale.net [10.192.242.124]) by az84smr01.freescale.net (8.14.3/8.14.0) with ESMTP id q7S72ogG032560; Tue, 28 Aug 2012 00:05:34 -0700 From: Richard Zhao To: , Subject: [PATCH v2 02/11] USB: chipidea: delay 2ms before read ID status at probe time Date: Tue, 28 Aug 2012 15:03:08 +0800 Message-ID: <1346137397-32374-3-git-send-email-richard.zhao@freescale.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1346137397-32374-1-git-send-email-richard.zhao@freescale.com> References: <1346137397-32374-1-git-send-email-richard.zhao@freescale.com> MIME-Version: 1.0 X-OriginatorOrg: freescale.com X-Spam-Note: CRM114 invocation failed X-Spam-Score: -2.6 (--) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-2.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at http://www.dnswl.org/, low trust [213.199.154.204 listed in list.dnswl.org] 0.0 KHOP_BIG_TO_CC Sent to 10+ recipients instaed of Bcc or a list -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: marex@denx.de, B20596@freescale.com, dong.aisheng@linaro.org, fabio.estevam@freescale.com, alexander.shishkin@linux.intel.com, B29397@freescale.com, balbi@ti.com, stern@rowland.harvard.edu, kernel@pengutronix.de, gregkh@linuxfoundation.org, richard.zhao@freescale.com, shawn.guo@linaro.org, mkl@pengutronix.de, linuxzsc@gmail.com X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org The ID pin needs 1ms debounce time, event at probe time. We delay 2ms for safe. Signed-off-by: Richard Zhao --- drivers/usb/chipidea/core.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c index 1083585..3c3ed77 100644 --- a/drivers/usb/chipidea/core.c +++ b/drivers/usb/chipidea/core.c @@ -462,6 +462,8 @@ static int __devinit ci_hdrc_probe(struct platform_device *pdev) if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET]) { ci->is_otg = true; + /* ID pin needs 1ms debouce time, we delay 2ms for safe */ + mdelay(2); ci->role = ci_otg_role(ci); } else { ci->role = ci->roles[CI_ROLE_HOST]