From patchwork Wed May 15 09:40:20 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ulf Hansson X-Patchwork-Id: 2571021 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) by patchwork2.kernel.org (Postfix) with ESMTP id ACD4ADF2A2 for ; Wed, 15 May 2013 09:45:00 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UcYEV-0003ce-1C; Wed, 15 May 2013 09:42:52 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UcYDt-0003sX-Nj; Wed, 15 May 2013 09:42:13 +0000 Received: from eu1sys200aog125.obsmtp.com ([207.126.144.159]) by merlin.infradead.org with smtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UcYDk-0003pA-Hp for linux-arm-kernel@lists.infradead.org; Wed, 15 May 2013 09:42:05 +0000 Received: from beta.dmz-us.st.com ([167.4.1.35]) (using TLSv1) by eu1sys200aob125.postini.com ([207.126.147.11]) with SMTP ID DSNKUZNYRuwBXPeYjApVS7x95UfJgw+d+AeK@postini.com; Wed, 15 May 2013 09:41:56 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 C891B9B; Wed, 15 May 2013 09:39:37 +0000 (GMT) Received: from relay2.stm.gmessaging.net (unknown [10.230.100.18]) by zeta.dmz-us.st.com (STMicroelectronics) with ESMTP id 0F29961; Wed, 15 May 2013 09:40:35 +0000 (GMT) Received: from exdcvycastm004.EQ1STM.local (alteon-source-exch [10.230.100.61]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (Client CN "exdcvycastm004", Issuer "exdcvycastm004" (not verified)) by relay2.stm.gmessaging.net (Postfix) with ESMTPS id 93616A8065; Wed, 15 May 2013 11:40:30 +0200 (CEST) Received: from steludxu1397.stericsson.com (10.230.100.153) by smtp.stericsson.com (10.230.100.2) with Microsoft SMTP Server (TLS) id 8.3.279.5; Wed, 15 May 2013 11:40:34 +0200 From: Ulf Hansson To: , Russell King Subject: [PATCH 2/4] mmc: mmci: Support signal voltage switch for UHS cards Date: Wed, 15 May 2013 11:40:20 +0200 Message-ID: <1368610823-14113-3-git-send-email-ulf.hansson@stericsson.com> X-Mailer: git-send-email 1.7.10 In-Reply-To: <1368610823-14113-1-git-send-email-ulf.hansson@stericsson.com> References: <1368610823-14113-1-git-send-email-ulf.hansson@stericsson.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130515_054204_837087_C387CCD0 X-CRM114-Status: GOOD ( 14.21 ) X-Spam-Score: -4.2 (----) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-4.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at http://www.dnswl.org/, medium trust [207.126.144.159 listed in list.dnswl.org] -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: Linus Walleij , Chris Ball , linux-mmc@vger.kernel.org, Ulf Hansson X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Ulf Hansson Add .start_signal_voltage_switch callback to be able to support UHS cards. The voltage switch requires the optional vqmmc regulator to exist since the actual voltage switch will be performed directly on it. Signed-off-by: Ulf Hansson --- drivers/mmc/host/mmci.c | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index 2983c15..8d4ceb8 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -1253,6 +1253,39 @@ static int mmci_get_cd(struct mmc_host *mmc) return status; } +static int mmci_sig_volt_switch(struct mmc_host *mmc, struct mmc_ios *ios) +{ + int ret = 0; + + if (!IS_ERR(mmc->supply.vqmmc)) { + + pm_runtime_get_sync(mmc_dev(mmc)); + + switch (ios->signal_voltage) { + case MMC_SIGNAL_VOLTAGE_330: + ret = regulator_set_voltage(mmc->supply.vqmmc, + 2700000, 3600000); + break; + case MMC_SIGNAL_VOLTAGE_180: + ret = regulator_set_voltage(mmc->supply.vqmmc, + 1700000, 1950000); + break; + case MMC_SIGNAL_VOLTAGE_120: + ret = regulator_set_voltage(mmc->supply.vqmmc, + 1100000, 1300000); + break; + } + + if (ret) + dev_warn(mmc_dev(mmc), "Voltage switch failed\n"); + + pm_runtime_mark_last_busy(mmc_dev(mmc)); + pm_runtime_put_autosuspend(mmc_dev(mmc)); + } + + return ret; +} + static irqreturn_t mmci_cd_irq(int irq, void *dev_id) { struct mmci_host *host = dev_id; @@ -1269,6 +1302,7 @@ static const struct mmc_host_ops mmci_ops = { .set_ios = mmci_set_ios, .get_ro = mmci_get_ro, .get_cd = mmci_get_cd, + .start_signal_voltage_switch = mmci_sig_volt_switch, }; #ifdef CONFIG_OF