From patchwork Thu May 18 03:42:59 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Wang X-Patchwork-Id: 9732467 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 642C26020B for ; Thu, 18 May 2017 03:43:50 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 431DA287A1 for ; Thu, 18 May 2017 03:43:50 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 37F6628801; Thu, 18 May 2017 03:43:50 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C49B3287A1 for ; Thu, 18 May 2017 03:43:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=DYu0fbzXvfkzDGTEuraLuPpSxOnjecbm3EMQuGtz5h8=; b=LQ3uizGnvmwfk80gEls+FoxG+j ZUA67aCgD/3PqccIrT/uSA65h+KU5h2c+lh6OAwTVjvMalDje0IsMfjdCVNnLw29rRRyd4uImlOwc Zh10SMq8Qb+WAZZtUoxyS2yow3zShnIspig09ZmyEIhTrK4rtxgYTKoF9P2OYMwyyH0YSa9YgL49e Ji7rrBiMNESSq7YJ4X5SOTjWTf28U/MxUnj9BM8jVjeHRbCg/5bv5cg075idUTwIyIFUVbbo8+5z7 QsEF6sCGeeAbL6XKlhg0hVl12JkYrRU53nA2ppSahupB/Vlqf22ZR4d2EHaQwr6FV+fc9OXLMvHLr F4ZcM9Fg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1dBCLt-00024g-1t; Thu, 18 May 2017 03:43:49 +0000 Received: from regular1.263xmail.com ([211.150.99.133]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dBCLe-0001oV-LZ; Thu, 18 May 2017 03:43:36 +0000 Received: from frank.wang?rock-chips.com (unknown [192.168.167.177]) by regular1.263xmail.com (Postfix) with ESMTP id D86558E79; Thu, 18 May 2017 11:43:07 +0800 (CST) X-263anti-spam: KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-KSVirus-check: 0 X-ABS-CHECKED: 4 Received: from localhost.localdomain (localhost [127.0.0.1]) by smtp.263.net (Postfix) with ESMTP id 455A839C; Thu, 18 May 2017 11:43:07 +0800 (CST) X-RL-SENDER: frank.wang@rock-chips.com X-FST-TO: heiko@sntech.de X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: frank.wang@rock-chips.com X-UNIQUE-TAG: <1cd4917f8677f9dbdbb1e8f00d3675fb> X-ATTACHMENT-NUM: 0 X-SENDER: wmc@rock-chips.com X-DNS-TYPE: 0 Received: from unknown (unknown [58.22.7.114]) by smtp.263.net (Postfix) whith SMTP id 16514JT86FQ; Thu, 18 May 2017 11:43:08 +0800 (CST) From: Frank Wang To: heiko@sntech.de, kishon@ti.com, william.wu@rock-chips.com Subject: [PATCH 1/4] phy: rockchip-inno-usb2: add a delay after phy resume Date: Thu, 18 May 2017 11:42:59 +0800 Message-Id: <1495078982-2555-2-git-send-email-frank.wang@rock-chips.com> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1495078982-2555-1-git-send-email-frank.wang@rock-chips.com> References: <1495078982-2555-1-git-send-email-frank.wang@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170517_204334_906654_C1057B22 X-CRM114-Status: UNSURE ( 6.75 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: huangtao@rock-chips.com, charles.chen@rock-chips.com, wmc@rock-chips.com, kevan.lan@rock-chips.com, linux-kernel@vger.kernel.org, linux-rockchip@lists.infradead.org, Frank Wang , cody.xie@rock-chips.com, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: William Wu When resume phy, it need about 1.5 ~ 2ms to wait for utmi_clk which used for USB controller to become stable. Signed-off-by: William Wu Signed-off-by: Frank Wang --- drivers/phy/phy-rockchip-inno-usb2.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/phy/phy-rockchip-inno-usb2.c b/drivers/phy/phy-rockchip-inno-usb2.c index 8efe78a..f12dc8d 100644 --- a/drivers/phy/phy-rockchip-inno-usb2.c +++ b/drivers/phy/phy-rockchip-inno-usb2.c @@ -463,6 +463,9 @@ static int rockchip_usb2phy_power_on(struct phy *phy) if (ret) return ret; + /* waiting for the utmi_clk to become stable */ + usleep_range(1500, 2000); + rport->suspended = false; return 0; }