From patchwork Sun Jul 10 13:14:36 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ido Yariv X-Patchwork-Id: 961252 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 p6ADEqHm019931 for ; Sun, 10 Jul 2011 13:14:58 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752874Ab1GJNO6 (ORCPT ); Sun, 10 Jul 2011 09:14:58 -0400 Received: from mail-ww0-f44.google.com ([74.125.82.44]:55270 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752732Ab1GJNO5 (ORCPT ); Sun, 10 Jul 2011 09:14:57 -0400 Received: by mail-ww0-f44.google.com with SMTP id 5so3184676wwe.1 for ; Sun, 10 Jul 2011 06:14:57 -0700 (PDT) Received: by 10.216.163.207 with SMTP id a57mr3667441wel.39.1310303697149; Sun, 10 Jul 2011 06:14:57 -0700 (PDT) Received: from localhost.localdomain (46-116-74-128.bb.netvision.net.il [46.116.74.128]) by mx.google.com with ESMTPS id g2sm6388912weg.14.2011.07.10.06.14.54 (version=TLSv1/SSLv3 cipher=OTHER); Sun, 10 Jul 2011 06:14:56 -0700 (PDT) From: Ido Yariv To: davinci-linux-open-source@linux.davincidsp.com, linux-arm-kernel@lists.infradead.org, linux-mmc@vger.kernel.org Cc: Ido Yariv Subject: [PATCH v2 3/6] arm: davinci: mmc: Add support for set_power callback Date: Sun, 10 Jul 2011 16:14:36 +0300 Message-Id: <1310303679-17936-4-git-send-email-ido@wizery.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1310303679-17936-1-git-send-email-ido@wizery.com> References: <1310303679-17936-1-git-send-email-ido@wizery.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]); Sun, 10 Jul 2011 13:14:58 +0000 (UTC) Some devices connected to the MMC bus are power controlled by external means. For instance, an SDIO device may be powered down/up by an external gpio line. In order to avoid toggling power from within the MMC host driver, add a set_power callback function, which will be called by set_ios upon powering down/up. Signed-off-by: Ido Yariv --- arch/arm/mach-davinci/include/mach/mmc.h | 3 +++ drivers/mmc/host/davinci_mmc.c | 13 +++++++++++++ 2 files changed, 16 insertions(+), 0 deletions(-) diff --git a/arch/arm/mach-davinci/include/mach/mmc.h b/arch/arm/mach-davinci/include/mach/mmc.h index d4f1e96..5ba6b22 100644 --- a/arch/arm/mach-davinci/include/mach/mmc.h +++ b/arch/arm/mach-davinci/include/mach/mmc.h @@ -12,6 +12,9 @@ struct davinci_mmc_config { /* get_cd()/get_wp() may sleep */ int (*get_cd)(int module); int (*get_ro)(int module); + + void (*set_power)(int module, bool on); + /* wires == 0 is equivalent to wires == 4 (4-bit parallel) */ u8 wires; diff --git a/drivers/mmc/host/davinci_mmc.c b/drivers/mmc/host/davinci_mmc.c index 0076c74..64a8325 100644 --- a/drivers/mmc/host/davinci_mmc.c +++ b/drivers/mmc/host/davinci_mmc.c @@ -807,12 +807,25 @@ static void calculate_clk_divider(struct mmc_host *mmc, struct mmc_ios *ios) static void mmc_davinci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) { struct mmc_davinci_host *host = mmc_priv(mmc); + struct platform_device *pdev = to_platform_device(mmc->parent); + struct davinci_mmc_config *config = pdev->dev.platform_data; dev_dbg(mmc_dev(host->mmc), "clock %dHz busmode %d powermode %d Vdd %04x\n", ios->clock, ios->bus_mode, ios->power_mode, ios->vdd); + switch (ios->power_mode) { + case MMC_POWER_OFF: + if (config && config->set_power) + config->set_power(pdev->id, false); + break; + case MMC_POWER_UP: + if (config && config->set_power) + config->set_power(pdev->id, true); + break; + } + switch (ios->bus_width) { case MMC_BUS_WIDTH_8: dev_dbg(mmc_dev(host->mmc), "Enabling 8 bit mode\n");