From patchwork Tue Jan 8 14:05:59 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Rudholm X-Patchwork-Id: 13921 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 4F19423E21 for ; Tue, 8 Jan 2013 14:06:48 +0000 (UTC) Received: from mail-vc0-f169.google.com (mail-vc0-f169.google.com [209.85.220.169]) by fiordland.canonical.com (Postfix) with ESMTP id 0455FA18E8E for ; Tue, 8 Jan 2013 14:06:47 +0000 (UTC) Received: by mail-vc0-f169.google.com with SMTP id gb23so405213vcb.28 for ; Tue, 08 Jan 2013 06:06:47 -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=ghWCjxZaQ+Dcaov+TNGl3xBqas736OB4q4SbfZeP6meCXYEGB21KRWWXha2PK79uTu /fUhWWqRkpYOUpBVKfZbWrIGgjjsTvSGgpGWY3B+LCuzZR7l9uMNzaaM5pR/JaVINiS4 3lo8b7bZPLqg3L2BjdLw6CXkBE4c8c02+xmX0a0+BEU8BnlofKH+TBIdszaHzQOsN7qT 7Za8gNB74LOzC9MmiSH0r6i46kDE2/a16NPTZg1pRFgNupbaiQWSAu3IVHxv6x6U/Wvt VcUWlbbuwfkEFyuFUluDAvVuyD+NK/KYKk13H6ozDSv49zeYrTL/Bj06EC1KMAH9wkHC Wmfw== X-Received: by 10.220.238.139 with SMTP id ks11mr84606632vcb.49.1357654007451; Tue, 08 Jan 2013 06:06:47 -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 st5csp111770veb; Tue, 8 Jan 2013 06:06:46 -0800 (PST) X-Received: by 10.14.214.132 with SMTP id c4mr173963042eep.18.1357654004041; Tue, 08 Jan 2013 06:06:44 -0800 (PST) Received: from eu1sys200aog103.obsmtp.com (eu1sys200aog103.obsmtp.com [207.126.144.115]) by mx.google.com with SMTP id b7si63674174eep.7.2013.01.08.06.06.40 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 08 Jan 2013 06:06:44 -0800 (PST) Received-SPF: neutral (google.com: 207.126.144.115 is neither permitted nor denied by best guess record for domain of johan.rudholm@stericsson.com) client-ip=207.126.144.115; Authentication-Results: mx.google.com; spf=neutral (google.com: 207.126.144.115 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-eu.st.com ([164.129.1.35]) (using TLSv1) by eu1sys200aob103.postini.com ([207.126.147.11]) with SMTP ID DSNKUOwn5oVVr5cdXZg6+R6UfRXqGGdYVRJc@postini.com; Tue, 08 Jan 2013 14:06:43 UTC Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 34105183; Tue, 8 Jan 2013 14:06:21 +0000 (GMT) Received: from relay2.stm.gmessaging.net (unknown [10.230.100.18]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 358084990; Tue, 8 Jan 2013 14:06:21 +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 74839A8065; Tue, 8 Jan 2013 15:06:15 +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; Tue, 8 Jan 2013 15:06:20 +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 v5 1/4] mmc: core: Add mmc_power_cycle Date: Tue, 8 Jan 2013 15:05:59 +0100 Message-ID: <1357653962-10887-2-git-send-email-johan.rudholm@stericsson.com> X-Mailer: git-send-email 1.7.10 In-Reply-To: <1357653962-10887-1-git-send-email-johan.rudholm@stericsson.com> References: <1357653962-10887-1-git-send-email-johan.rudholm@stericsson.com> MIME-Version: 1.0 X-Gm-Message-State: ALoCoQndAqJgJF/7Goror3NkwxwMI2wwcRVMecbwR5h/T3K5AvODT79R2NdGZEj5sd/uVoTREPLG 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) {