From patchwork Fri Jun 2 03:20:23 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Wang X-Patchwork-Id: 9761507 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 DE3886038E for ; Fri, 2 Jun 2017 03:36:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CD6C728563 for ; Fri, 2 Jun 2017 03:36:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C16EF28565; Fri, 2 Jun 2017 03:36:27 +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=-0.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,URIBL_BLACK autolearn=no 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 5672628565 for ; Fri, 2 Jun 2017 03:36:26 +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=65FiIi8qglNZK5pNWluApBrzUC1TMu+z+GKYX4sPoxQ=; b=Cz83x4JCFXiRKTHqIM2iVPNE2P rb0tDSFRPLt3gfTSK2O0DzymQjuvIR7J1mQt++yNDdetMsvfhCXp1/nbnk/FtmSRjPvepulXeVtUv D0m5FLtHlQHTIQH30ircDxv/NPpEq3VqScCG7niOzV9mlVIM27EDosCMmajWRwXa+4/z1uAsvuv0I cjBNL4xxKqXL4BA+vC421TJrpeQ5qRpD85Yuu37NBXYTeAG/h10EKlcUT9xjBMKW51J76ogg7PWG6 M7FHpxUyvPZ7Udg9LCZBcnWXF7KoqnbmhzS70em5D/ULnnTRktyt4PEVCUZ5jnt0995iQpOw86Skv Aar/Fp9Q==; 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 1dGdNw-0002Qy-Um; Fri, 02 Jun 2017 03:36:24 +0000 Received: from regular1.263xmail.com ([211.150.99.140]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1dGd92-0003sg-6c; Fri, 02 Jun 2017 03:21:02 +0000 Received: from frank.wang?rock-chips.com (unknown [192.168.167.228]) by regular1.263xmail.com (Postfix) with ESMTP id DF5A94A47; Fri, 2 Jun 2017 11:20:33 +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 E57BF3F5; Fri, 2 Jun 2017 11:20:31 +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: 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 13015EJD148; Fri, 02 Jun 2017 11:20:34 +0800 (CST) From: Frank Wang To: heiko@sntech.de, kishon@ti.com, robh+dt@kernel.org, mark.rutland@arm.com, william.wu@rock-chips.com Subject: [PATCH v2 1/4] phy: rockchip-inno-usb2: add a delay after phy resume Date: Fri, 2 Jun 2017 11:20:23 +0800 Message-Id: <1496373626-27856-2-git-send-email-frank.wang@rock-chips.com> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1496373626-27856-1-git-send-email-frank.wang@rock-chips.com> References: <1496373626-27856-1-git-send-email-frank.wang@rock-chips.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170601_202100_466434_372F92F6 X-CRM114-Status: UNSURE ( 6.35 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: huangtao@rock-chips.com, devicetree@vger.kernel.org, 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-rockchip" Errors-To: linux-rockchip-bounces+patchwork-linux-rockchip=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; }