From patchwork Fri Aug 26 07:54:47 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chunhe Lan X-Patchwork-Id: 1101252 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p7Q8vbN1027256 for ; Fri, 26 Aug 2011 08:57:37 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754001Ab1HZI5U (ORCPT ); Fri, 26 Aug 2011 04:57:20 -0400 Received: from db3ehsobe006.messaging.microsoft.com ([213.199.154.144]:17824 "EHLO DB3EHSOBE006.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754545Ab1HZI5R (ORCPT ); Fri, 26 Aug 2011 04:57:17 -0400 Received: from mail65-db3-R.bigfish.com (10.3.81.241) by DB3EHSOBE006.bigfish.com (10.3.84.26) with Microsoft SMTP Server id 14.1.225.22; Fri, 26 Aug 2011 08:57:16 +0000 Received: from mail65-db3 (localhost.localdomain [127.0.0.1]) by mail65-db3-R.bigfish.com (Postfix) with ESMTP id 467C12401C6; Fri, 26 Aug 2011 08:57:16 +0000 (UTC) X-SpamScore: 0 X-BigFish: VS0(zzzz1202hzz8275bh8275dhz2dh2a8h668h839h63h) X-Spam-TCS-SCL: 2:0 X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPVD:NLI; H:mail.freescale.net; RD:none; EFVD:NLI Received: from mail65-db3 (localhost.localdomain [127.0.0.1]) by mail65-db3 (MessageSwitch) id 1314349036166504_22783; Fri, 26 Aug 2011 08:57:16 +0000 (UTC) Received: from DB3EHSMHS006.bigfish.com (unknown [10.3.81.253]) by mail65-db3.bigfish.com (Postfix) with ESMTP id 23CD6360050; Fri, 26 Aug 2011 08:57:16 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by DB3EHSMHS006.bigfish.com (10.3.87.106) with Microsoft SMTP Server (TLS) id 14.1.225.22; Fri, 26 Aug 2011 08:57:15 +0000 Received: from az33smr01.freescale.net (10.64.34.199) by 039-SN1MMR1-001.039d.mgd.msft.net (10.84.1.13) with Microsoft SMTP Server id 14.1.323.2; Fri, 26 Aug 2011 03:57:13 -0500 Received: from localhost.localdomain (rock.ap.freescale.net [10.193.20.106]) by az33smr01.freescale.net (8.13.1/8.13.0) with ESMTP id p7Q8vAOx020574; Fri, 26 Aug 2011 03:57:11 -0500 (CDT) From: Chunhe Lan To: CC: , , Chunhe Lan , Shengzhou Liu , Chris Ball Subject: [PATCH 2/3 v2] mmc: Use mmc_delay() instead of mdelay() for time delay Date: Fri, 26 Aug 2011 15:54:47 +0800 Message-ID: <1314345287-14849-1-git-send-email-Chunhe.Lan@freescale.com> X-Mailer: git-send-email 1.6.4 MIME-Version: 1.0 X-OriginatorOrg: freescale.com Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Fri, 26 Aug 2011 08:57:37 +0000 (UTC) The mmc_delay() is a wrapper function for mdelay() and msleep(). o mdelay() -- block the system when busy-waiting. o msleep() -- suspend the currently running task to enable CPU to process other tasks, so it is non-blocking regarding the whole system. When the desired delay time is more than a period of timer interrupt, just use msleep(). Change mdelay() to mmc_delay() to avoid chewing CPU when busy wait. Signed-off-by: Shengzhou Liu Signed-off-by: Chunhe Lan Cc: Chris Ball --- drivers/mmc/host/sdhci-esdhc.h | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/mmc/host/sdhci-esdhc.h b/drivers/mmc/host/sdhci-esdhc.h index c3b08f1..b8c0ab1 100644 --- a/drivers/mmc/host/sdhci-esdhc.h +++ b/drivers/mmc/host/sdhci-esdhc.h @@ -1,7 +1,7 @@ /* * Freescale eSDHC controller driver generics for OF and pltfm. * - * Copyright (c) 2007 Freescale Semiconductor, Inc. + * Copyright (c) 2007, 2011 Freescale Semiconductor, Inc. * Copyright (c) 2009 MontaVista Software, Inc. * Copyright (c) 2010 Pengutronix e.K. * Author: Wolfram Sang @@ -73,7 +73,7 @@ static inline void esdhc_set_clock(struct sdhci_host *host, unsigned int clock) | (div << ESDHC_DIVIDER_SHIFT) | (pre_div << ESDHC_PREDIV_SHIFT)); sdhci_writel(host, temp, ESDHC_SYSTEM_CONTROL); - mdelay(100); + mmc_delay(100); out: host->clock = clock; }