From patchwork Mon Sep 21 06:13:33 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Q2h1bmZlbmcgWXVuICjkupHmmKXls7Ap?= X-Patchwork-Id: 11788355 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 6BACF16BC for ; Mon, 21 Sep 2020 06:17:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4C4842084C for ; Mon, 21 Sep 2020 06:17:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="ar2WyMZz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726448AbgIUGRU (ORCPT ); Mon, 21 Sep 2020 02:17:20 -0400 Received: from mailgw02.mediatek.com ([1.203.163.81]:44379 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1726149AbgIUGRQ (ORCPT ); Mon, 21 Sep 2020 02:17:16 -0400 X-UUID: 9b8aeb5f100842b88219cd125606aac5-20200921 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=fhoC7nd4R36M3issGh+SxVPkb1Qjg4iuhqpKgwaNaKE=; b=ar2WyMZzX2bOPL47+URojAsnd8qASu3pjqCCyQCTaqvuXRJMR+9fW7EXGUmn8P8ispWphQYabRcdzgtN70lqNH71mBtADueARgUzO5PTcmz+4IVjG4lXxVsm8fhu+OCsjJfSeM4kYC2rX2fOhAWGutJE6WdTwDi4NUmk61diOzg=; X-UUID: 9b8aeb5f100842b88219cd125606aac5-20200921 Received: from mtkcas34.mediatek.inc [(172.27.4.253)] by mailgw02.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 50010507; Mon, 21 Sep 2020 14:17:11 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by MTKMBS31N1.mediatek.inc (172.27.4.69) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 21 Sep 2020 14:17:10 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 21 Sep 2020 14:17:08 +0800 From: Chunfeng Yun To: Greg Kroah-Hartman , Felipe Balbi CC: Mathias Nyman , Matthias Brugger , Chunfeng Yun , "Eric W. Biederman" , Sumit Garg , Lee Jones , Jann Horn , Jason Yan , Arnd Bergmann , Chuhong Yuan , "Gustavo A. R. Silva" , "Ben Dooks (Codethink)" , Saurav Girepunje , , , , , Sergei Shtylyov , Daniel Thompson Subject: [PATCH v4 09/11] usb: phy: phy-mv-usb: convert to readl_poll_timeout_atomic() Date: Mon, 21 Sep 2020 14:13:33 +0800 Message-ID: <1600668815-12135-9-git-send-email-chunfeng.yun@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1600668815-12135-1-git-send-email-chunfeng.yun@mediatek.com> References: <1600668815-12135-1-git-send-email-chunfeng.yun@mediatek.com> MIME-Version: 1.0 X-TM-SNTS-SMTP: 2F9FBD9981B001EA895A14F6E8D251A0B594F6BC5073CA2F55F375A17B5E66502000:8 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Use readl_poll_timeout_atomic() to simplify code Signed-off-by: Chunfeng Yun --- v4: no changes v3: re-align argument of log suggested by Sergei v2: udelay 10us instead of 20us according to kerneldoc --- drivers/usb/phy/phy-mv-usb.c | 18 ++++++++---------- 1 file changed, 8 insertions(+), 10 deletions(-) diff --git a/drivers/usb/phy/phy-mv-usb.c b/drivers/usb/phy/phy-mv-usb.c index ce767ec..576d925 100644 --- a/drivers/usb/phy/phy-mv-usb.c +++ b/drivers/usb/phy/phy-mv-usb.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -135,8 +136,8 @@ static int mv_otg_set_timer(struct mv_otg *mvotg, unsigned int id, static int mv_otg_reset(struct mv_otg *mvotg) { - unsigned int loops; u32 tmp; + int ret; /* Stop the controller */ tmp = readl(&mvotg->op_regs->usbcmd); @@ -146,15 +147,12 @@ static int mv_otg_reset(struct mv_otg *mvotg) /* Reset the controller to get default values */ writel(USBCMD_CTRL_RESET, &mvotg->op_regs->usbcmd); - loops = 500; - while (readl(&mvotg->op_regs->usbcmd) & USBCMD_CTRL_RESET) { - if (loops == 0) { - dev_err(&mvotg->pdev->dev, - "Wait for RESET completed TIMEOUT\n"); - return -ETIMEDOUT; - } - loops--; - udelay(20); + ret = readl_poll_timeout_atomic(&mvotg->op_regs->usbcmd, tmp, + (tmp & USBCMD_CTRL_RESET), 10, 10000); + if (ret < 0) { + dev_err(&mvotg->pdev->dev, + "Wait for RESET completed TIMEOUT\n"); + return ret; } writel(0x0, &mvotg->op_regs->usbintr);