From patchwork Tue Dec 18 14:38:56 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Rudholm X-Patchwork-Id: 13641 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 4C62623E2D for ; Tue, 18 Dec 2012 14:41:05 +0000 (UTC) Received: from mail-ie0-f182.google.com (mail-ie0-f182.google.com [209.85.223.182]) by fiordland.canonical.com (Postfix) with ESMTP id E5C50A194B4 for ; Tue, 18 Dec 2012 14:41:04 +0000 (UTC) Received: by mail-ie0-f182.google.com with SMTP id s9so976617iec.13 for ; Tue, 18 Dec 2012 06:41:04 -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=muAimiwILavk2f34Eyyag0PbZSUrhTYzkZW4d25JUlrNBSyZZ9POmF0+p6wxogLAFU LVVc9hywOIpQXIwLWojU2nOmKR2ABz2jfHfkdqvVgzXnY+cBd6RQw15T4qNvY4ZQe9ek Uivt9zQcVgc88sKoS4ndFiCYwS+DFc7HWpOi3rRWo70Y/g6fO8ZFR74K2jPwYGuInKql 5uxdq7eir9ufA8FN2Q6+TyeU4iynW3qLu+C62O3iRyT8NBeKycQC8pYVKnqWIoaDEel7 3k07ouYoTl5b6LBkgvmAYLdCqtGfAM4DUYoH6wpLdrb2rPEqhioCAgx4Ab/LBoLqbtqV aYJg== X-Received: by 10.50.36.164 with SMTP id r4mr2560417igj.57.1355841664358; Tue, 18 Dec 2012 06:41:04 -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 10.50.67.148 with SMTP id n20csp145622igt; Tue, 18 Dec 2012 06:41:03 -0800 (PST) X-Received: by 10.14.225.72 with SMTP id y48mr5964023eep.46.1355841663416; Tue, 18 Dec 2012 06:41:03 -0800 (PST) Received: from eu1sys200aog114.obsmtp.com (eu1sys200aog114.obsmtp.com [207.126.144.137]) by mx.google.com with SMTP id l1si4778000een.109.2012.12.18.06.40.58 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 18 Dec 2012 06:41:03 -0800 (PST) Received-SPF: neutral (google.com: 207.126.144.137 is neither permitted nor denied by best guess record for domain of johan.rudholm@stericsson.com) client-ip=207.126.144.137; Authentication-Results: mx.google.com; spf=neutral (google.com: 207.126.144.137 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 eu1sys200aob114.postini.com ([207.126.147.11]) with SMTP ID DSNKUNCAbbn7XZ6DMq4lTxZX4I/gqEvYm4X1@postini.com; Tue, 18 Dec 2012 14:41:02 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 A76AE49; Tue, 18 Dec 2012 14:38:30 +0000 (GMT) Received: from relay2.stm.gmessaging.net (unknown [10.230.100.18]) by zeta.dmz-us.st.com (STMicroelectronics) with ESMTP id 7555A58; Tue, 18 Dec 2012 09:24:24 +0000 (GMT) Received: from exdcvycastm003.EQ1STM.local (alteon-source-exch [10.230.100.61]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (Client CN "exdcvycastm003", Issuer "exdcvycastm003" (not verified)) by relay2.stm.gmessaging.net (Postfix) with ESMTPS id 7ECB7A807E; Tue, 18 Dec 2012 15:39:02 +0100 (CET) Received: from steludxu1610.lud.stericsson.com (10.230.100.153) by smtp.stericsson.com (10.230.100.1) with Microsoft SMTP Server (TLS) id 8.3.83.0; Tue, 18 Dec 2012 15:39:07 +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 v2 1/3] mmc: core: Add mmc_power_cycle Date: Tue, 18 Dec 2012 15:38:56 +0100 Message-ID: <1355841538-6674-2-git-send-email-johan.rudholm@stericsson.com> X-Mailer: git-send-email 1.7.10 In-Reply-To: <1355841538-6674-1-git-send-email-johan.rudholm@stericsson.com> References: <1355841538-6674-1-git-send-email-johan.rudholm@stericsson.com> MIME-Version: 1.0 X-Gm-Message-State: ALoCoQmdO1TjfiygWn89EEaocwD/9vAmWtBGIwKxP1D9e/PXhAmANBiL9UiDw/0Ld2SvolhUs61l 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) {