From patchwork Thu Jan 3 13:19:34 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Rudholm X-Patchwork-Id: 13771 Return-Path: X-Original-To: patchwork@peony.canonical.com Delivered-To: patchwork@peony.canonical.com Received: from fiordland.canonical.com (fiordland.canonical.com [91.189.94.145]) by peony.canonical.com (Postfix) with ESMTP id 205FC23EDC for ; Thu, 3 Jan 2013 13:21:41 +0000 (UTC) Received: from mail-vb0-f51.google.com (mail-vb0-f51.google.com [209.85.212.51]) by fiordland.canonical.com (Postfix) with ESMTP id AA771A18E9F for ; Thu, 3 Jan 2013 13:21:40 +0000 (UTC) Received: by mail-vb0-f51.google.com with SMTP id fq11so15505696vbb.10 for ; Thu, 03 Jan 2013 05:21:40 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=x-received:x-forwarded-to:x-forwarded-for:delivered-to:x-received :received-spf:from:to:cc:subject:date:message-id:x-mailer :in-reply-to:references:mime-version:content-type:x-gm-message-state; bh=j72s3hnPOnMkSVNUJ24uH7090+idcKAQHyVj/dBLM14=; b=Fa/c6n9KzTMSTVfIXvsQQumJeZEx8TTUxDK6WDgOxXnQAqCi5zFZVH3aMg5tuyrFrO HSCVVLLoec227k7XXY94i3TgqKvtgVblX53Qm1dGvQVPLGXODZbH2l/+mU/OncmukYC5 v8a7sOAogMky8W+ob+YL+ZiUDCSRDCWvYjBZvNhAhi6fC0K+XyzbOS1Q3ss4hh8A/vV8 qbOGWttLGoNZ3Zd6qNcqRgVPc/0ENdq1X8EypMSCk642mohcR827PQlYBTEgcz+pyQCt sa9e5ilZlIptJtfMproQwOji4kQ0heWJ/NKQZW98QulSx5jgNY3PQ3cgT3xSO/BZvV5P a4og== X-Received: by 10.220.238.139 with SMTP id ks11mr72075427vcb.49.1357219300216; Thu, 03 Jan 2013 05:21:40 -0800 (PST) X-Forwarded-To: linaro-patchwork@canonical.com X-Forwarded-For: patch@linaro.org linaro-patchwork@canonical.com Delivered-To: patches@linaro.org Received: by 10.58.145.101 with SMTP id st5csp91006veb; Thu, 3 Jan 2013 05:21:38 -0800 (PST) X-Received: by 10.14.213.134 with SMTP id a6mr134316146eep.45.1357219297769; Thu, 03 Jan 2013 05:21:37 -0800 (PST) Received: from eu1sys200aog110.obsmtp.com (eu1sys200aog110.obsmtp.com [207.126.144.129]) by mx.google.com with SMTP id l8si126289284eep.68.2013.01.03.05.21.34 (version=TLSv1/SSLv3 cipher=OTHER); Thu, 03 Jan 2013 05:21:37 -0800 (PST) Received-SPF: neutral (google.com: 207.126.144.129 is neither permitted nor denied by best guess record for domain of johan.rudholm@stericsson.com) client-ip=207.126.144.129; Authentication-Results: mx.google.com; spf=neutral (google.com: 207.126.144.129 is neither permitted nor denied by best guess record for domain of johan.rudholm@stericsson.com) smtp.mail=johan.rudholm@stericsson.com Received: from beta.dmz-us.st.com ([167.4.1.35]) (using TLSv1) by eu1sys200aob110.postini.com ([207.126.147.11]) with SMTP ID DSNKUOWFzNCYnG5UL0Fd2rHGmrmsVOT5l838@postini.com; Thu, 03 Jan 2013 13:21:37 UTC Received: from zeta.dmz-us.st.com (ns4.st.com [167.4.16.71]) by beta.dmz-us.st.com (STMicroelectronics) with ESMTP id E81633D; Thu, 3 Jan 2013 13:19:01 +0000 (GMT) Received: from relay2.stm.gmessaging.net (unknown [10.230.100.18]) by zeta.dmz-us.st.com (STMicroelectronics) with ESMTP id 4669368; Thu, 3 Jan 2013 07:52:36 +0000 (GMT) Received: from exdcvycastm022.EQ1STM.local (alteon-source-exch [10.230.100.61]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (Client CN "exdcvycastm022", Issuer "exdcvycastm022" (not verified)) by relay2.stm.gmessaging.net (Postfix) with ESMTPS id 5197DA8083; Thu, 3 Jan 2013 14:19:36 +0100 (CET) Received: from steludxu1610.lud.stericsson.com (10.230.100.153) by smtp.stericsson.com (10.230.100.30) with Microsoft SMTP Server (TLS) id 8.3.83.0; Thu, 3 Jan 2013 14:19:40 +0100 From: Johan Rudholm To: , Chris Ball Cc: Per Forlin , Ulf Hansson , Fredrik Soderstedt , Kevin Liu , Philip Rakity , Daniel Drake , Aaron , Subhash Jadavani , Johan Rudholm Subject: [PATCH v3 1/3] mmc: core: Add mmc_power_cycle Date: Thu, 3 Jan 2013 14:19:34 +0100 Message-ID: <1357219176-21892-2-git-send-email-johan.rudholm@stericsson.com> X-Mailer: git-send-email 1.7.10 In-Reply-To: <1357219176-21892-1-git-send-email-johan.rudholm@stericsson.com> References: <1357219176-21892-1-git-send-email-johan.rudholm@stericsson.com> MIME-Version: 1.0 X-Gm-Message-State: ALoCoQnysGVKTuJmkxgNVQQifiJ1+Z4JsbcSoHz3FULo41f+y2P7bpeLdPeL2tHwcc8rnm1vqLiv Add mmc_power_cycle which can be used to power cycle for instance SD-cards. Signed-off-by: Johan Rudholm --- drivers/mmc/core/core.c | 8 ++++++++ drivers/mmc/core/core.h | 1 + 2 files changed, 9 insertions(+) diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index aaed768..285f064 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -1372,6 +1372,14 @@ void mmc_power_off(struct mmc_host *host) mmc_host_clk_release(host); } +void mmc_power_cycle(struct mmc_host *host) +{ + mmc_power_off(host); + /* Wait at least 1 ms according to SD spec */ + mmc_delay(1); + mmc_power_up(host); +} + /* * Cleanup when the last reference to the bus operator is dropped. */ diff --git a/drivers/mmc/core/core.h b/drivers/mmc/core/core.h index 3bdafbc..4a90067 100644 --- a/drivers/mmc/core/core.h +++ b/drivers/mmc/core/core.h @@ -45,6 +45,7 @@ int mmc_set_signal_voltage(struct mmc_host *host, int signal_voltage, void mmc_set_timing(struct mmc_host *host, unsigned int timing); void mmc_set_driver_type(struct mmc_host *host, unsigned int drv_type); void mmc_power_off(struct mmc_host *host); +void mmc_power_cycle(struct mmc_host *host); static inline void mmc_delay(unsigned int ms) {