From patchwork Mon Jan 7 15:10:25 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Johan Rudholm X-Patchwork-Id: 13890 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 76A6E23E33 for ; Mon, 7 Jan 2013 15:12:01 +0000 (UTC) Received: from mail-vb0-f43.google.com (mail-vb0-f43.google.com [209.85.212.43]) by fiordland.canonical.com (Postfix) with ESMTP id 25700A18905 for ; Mon, 7 Jan 2013 15:12:01 +0000 (UTC) Received: by mail-vb0-f43.google.com with SMTP id fs19so19238311vbb.16 for ; Mon, 07 Jan 2013 07:12:00 -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=TfCOjgDgAE1w8QZiX5VKtwydV6EXvrntXQRiv63Epi0X3jWj+8ljkE5fuWVF1aAd+i LsoPmtcRrLMVKdaAUZ9rt2mCAb3Ks5pVWw3MfLutP4Z0lWz+4MKNBv8pRWCJzx+zZwy/ CFcL0hkzRKZcUsWPHEP6lG0ZEtJ0Ym5dWcceHMABXcKRUG0LMCZjN8O5kydKmeyZ1DdW tyiZi0gq72F99WNOPdfBiv4Negr4Lsyjt6IDgkKiptG3S6GqebhGP3gOeGsM/GDIQauI nGIN0/AWRxCqhF+RwR6cQ49bHPfv1UNDYT2i99Z2AgwMkl8mRhltt43rOMlRLdnPRjM5 R3GA== X-Received: by 10.58.247.132 with SMTP id ye4mr86169528vec.9.1357571520650; Mon, 07 Jan 2013 07:12:00 -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 st5csp65344veb; Mon, 7 Jan 2013 07:12:00 -0800 (PST) X-Received: by 10.14.214.132 with SMTP id c4mr165542938eep.18.1357571519331; Mon, 07 Jan 2013 07:11:59 -0800 (PST) Received: from eu1sys200aog108.obsmtp.com (eu1sys200aog108.obsmtp.com [207.126.144.125]) by mx.google.com with SMTP id b7si55310453eep.7.2013.01.07.07.11.54 (version=TLSv1/SSLv3 cipher=OTHER); Mon, 07 Jan 2013 07:11:59 -0800 (PST) Received-SPF: neutral (google.com: 207.126.144.125 is neither permitted nor denied by best guess record for domain of johan.rudholm@stericsson.com) client-ip=207.126.144.125; Authentication-Results: mx.google.com; spf=neutral (google.com: 207.126.144.125 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-ap.st.com ([138.198.100.35]) (using TLSv1) by eu1sys200aob108.postini.com ([207.126.147.11]) with SMTP ID DSNKUOrlrfpXrNjuP9xoBbp3/uj2wjZaJhQy@postini.com; Mon, 07 Jan 2013 15:11:58 UTC Received: from zeta.dmz-ap.st.com (ns6.st.com [138.198.234.13]) by beta.dmz-ap.st.com (STMicroelectronics) with ESMTP id 3EB99BF; Mon, 7 Jan 2013 15:03:26 +0000 (GMT) Received: from relay1.stm.gmessaging.net (unknown [10.230.100.17]) by zeta.dmz-ap.st.com (STMicroelectronics) with ESMTP id 31C7AA9F; Mon, 7 Jan 2013 15:11:36 +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 relay1.stm.gmessaging.net (Postfix) with ESMTPS id ED61B24C326; Mon, 7 Jan 2013 16:11:27 +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; Mon, 7 Jan 2013 16:11:34 +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 v4 1/4] mmc: core: Add mmc_power_cycle Date: Mon, 7 Jan 2013 16:10:25 +0100 Message-ID: <1357571428-19466-2-git-send-email-johan.rudholm@stericsson.com> X-Mailer: git-send-email 1.7.10 In-Reply-To: <1357571428-19466-1-git-send-email-johan.rudholm@stericsson.com> References: <1357571428-19466-1-git-send-email-johan.rudholm@stericsson.com> MIME-Version: 1.0 X-Gm-Message-State: ALoCoQkzIK7gJEfks3sh6bU8/CI++MTYp/nNqvqM11GVLdGOLIXspmaC7POQ9l1/Jplt8wrR1IOL 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) {