From patchwork Thu Jul 12 07:01:42 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Zhao X-Patchwork-Id: 1187341 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork2.kernel.org (Postfix) with ESMTP id 4D9A8E0038 for ; Thu, 12 Jul 2012 07:17:55 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1SpDYl-0003D4-T6; Thu, 12 Jul 2012 07:11:36 +0000 Received: from db3ehsobe003.messaging.microsoft.com ([213.199.154.141] helo=db3outboundpool.messaging.microsoft.com) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1SpDQA-0001jU-9f for linux-arm-kernel@lists.infradead.org; Thu, 12 Jul 2012 07:02:56 +0000 Received: from mail82-db3-R.bigfish.com (10.3.81.244) by DB3EHSOBE003.bigfish.com (10.3.84.23) with Microsoft SMTP Server id 14.1.225.23; Thu, 12 Jul 2012 07:02:36 +0000 Received: from mail82-db3 (localhost [127.0.0.1]) by mail82-db3-R.bigfish.com (Postfix) with ESMTP id D0D2244012F; Thu, 12 Jul 2012 07:02:36 +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(zzzz1202hzz8275bhz2dh2a8h668h839hd24he5bhf0ah107ah) Received: from mail82-db3 (localhost.localdomain [127.0.0.1]) by mail82-db3 (MessageSwitch) id 1342076555308497_5138; Thu, 12 Jul 2012 07:02:35 +0000 (UTC) Received: from DB3EHSMHS004.bigfish.com (unknown [10.3.81.253]) by mail82-db3.bigfish.com (Postfix) with ESMTP id 47A313A0215; Thu, 12 Jul 2012 07:02:35 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by DB3EHSMHS004.bigfish.com (10.3.87.104) with Microsoft SMTP Server (TLS) id 14.1.225.23; Thu, 12 Jul 2012 07:02:34 +0000 Received: from az84smr01.freescale.net (10.64.34.197) by 039-SN1MMR1-002.039d.mgd.msft.net (10.84.1.15) with Microsoft SMTP Server (TLS) id 14.2.298.5; Thu, 12 Jul 2012 02:02:08 -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 q6C71r2K016222; Thu, 12 Jul 2012 00:02:04 -0700 From: Richard Zhao To: , Subject: [PATCH 02/12] USB: chipidea: delay 2ms before read ID status at probe time Date: Thu, 12 Jul 2012 15:01:42 +0800 Message-ID: <1342076512-19207-3-git-send-email-richard.zhao@freescale.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1342076512-19207-1-git-send-email-richard.zhao@freescale.com> References: <1342076512-19207-1-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 [213.199.154.141 listed in list.dnswl.org] -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]