From patchwork Fri Aug 22 13:47:50 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yuvaraj CD X-Patchwork-Id: 4763841 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 74529C0338 for ; Fri, 22 Aug 2014 13:48:22 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7291520173 for ; Fri, 22 Aug 2014 13:48:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2EB4220136 for ; Fri, 22 Aug 2014 13:48:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756362AbaHVNsT (ORCPT ); Fri, 22 Aug 2014 09:48:19 -0400 Received: from mail-pd0-f172.google.com ([209.85.192.172]:51009 "EHLO mail-pd0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756319AbaHVNsS (ORCPT ); Fri, 22 Aug 2014 09:48:18 -0400 Received: by mail-pd0-f172.google.com with SMTP id y13so15708642pdi.31 for ; Fri, 22 Aug 2014 06:48:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=yF3Q0xvzwmzidDDq0K+gQKsR8jbuZSjYDwgyTtYmGzs=; b=1ClSWolEyIyik5tYglI0eB1wfO25Sl1FZ0YSFjfaQLdg6iWRLDpHUG1ye9H95UwE3z R9QVkVAAsTAO8Zi7JDhX9PTGa0hmu0u6Wyg7NbUaJ4f2tbdd+2m6O+vpo1dMsDWvjWXU cgSZ3Y4BaAG1pqZ0eyldrm1L6X/buM+ditqczN0le08GA8KQu1AYgOTuvk1pMPWknw2W v761fD7dXLVy8zgxTBGQfV1k0znGcuKVTbpffSxos+iTSFraQcMS6rQa80iSmUfTEZic hAAr0f8YPI2Gc8iUKWmlMlXCuxm+GmIPvFLjGZ4OinodQmTCVjN6UUc6I5/doktotjDn GSXg== X-Received: by 10.70.140.102 with SMTP id rf6mr6776902pdb.4.1408715298139; Fri, 22 Aug 2014 06:48:18 -0700 (PDT) Received: from localhost.localdomain ([14.140.216.146]) by mx.google.com with ESMTPSA id mq6sm7694422pdb.82.2014.08.22.06.48.12 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 22 Aug 2014 06:48:17 -0700 (PDT) From: Yuvaraj Kumar C D X-Google-Original-From: Yuvaraj Kumar C D To: linux-samsung-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, dianders@google.com, dianders@chromium.org, jh80.chung@samsung.com, cjb@laptop.org, tgih.jun@samsung.com, linux-mmc@vger.kernel.org, ulf.hansson@linaro.org Cc: sonnyrao@chromium.org, t.figa@samsung.com, kgene.kim@samsung.com, joshi@samsung.com, prashanth.g@samsung.com, alim.akhtar@samsung.com, javier.martinez@collabora.co.uk, a.kesavan@samsung.com, Yuvaraj Kumar C D Subject: [PATCH V2 1/3] mmc: dw_mmc: use mmc_regulator_get_supply to handle regulators Date: Fri, 22 Aug 2014 19:17:50 +0530 Message-Id: <1408715272-13833-2-git-send-email-yuvaraj.cd@samsung.com> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1408715272-13833-1-git-send-email-yuvaraj.cd@samsung.com> References: <1408715272-13833-1-git-send-email-yuvaraj.cd@samsung.com> Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED, FREEMAIL_FROM, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, T_DKIM_INVALID, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This patch makes use of mmc_regulator_get_supply() to handle the vmmc and vqmmc regulators.Also it moves the code handling the these regulators to dw_mci_set_ios().It turned on the vmmc and vqmmc during MMC_POWER_UP and MMC_POWER_ON,and turned off during MMC_POWER_OFF. Signed-off-by: Yuvaraj Kumar C D --- changes from v1: 1.Used mmc_regulator_set_ocr() instead of regulator_enable() for vmmc. 2.Turned on vmmc and vqmmc during MMC_POWER_UP. 3. Removed the flags DW_MMC_CARD_POWERED and DW_MMC_IO_POWERED which added during the initial version of this patch. 4. Added error message, if it failed to turn on regulator's. drivers/mmc/host/dw_mmc.c | 72 +++++++++++++++++++++----------------------- include/linux/mmc/dw_mmc.h | 2 +- 2 files changed, 36 insertions(+), 38 deletions(-) diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c index 7f227e9..aadb0d6 100644 --- a/drivers/mmc/host/dw_mmc.c +++ b/drivers/mmc/host/dw_mmc.c @@ -936,6 +936,7 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) struct dw_mci_slot *slot = mmc_priv(mmc); const struct dw_mci_drv_data *drv_data = slot->host->drv_data; u32 regs; + int ret; switch (ios->bus_width) { case MMC_BUS_WIDTH_4: @@ -974,12 +975,38 @@ static void dw_mci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios) switch (ios->power_mode) { case MMC_POWER_UP: + if (!IS_ERR(mmc->supply.vmmc)) { + ret = mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, + ios->vdd); + if (ret) { + dev_err(slot->host->dev, + "failed to enable vmmc regulator\n"); + /*return, if failed turn on vmmc*/ + return; + } + } + if (!IS_ERR(mmc->supply.vqmmc) && !slot->host->vqmmc_enabled) { + ret = regulator_enable(mmc->supply.vqmmc); + if (ret < 0) + dev_err(slot->host->dev, + "failed to enable vqmmc regulator\n"); + else + slot->host->vqmmc_enabled = true; + } set_bit(DW_MMC_CARD_NEED_INIT, &slot->flags); regs = mci_readl(slot->host, PWREN); regs |= (1 << slot->id); mci_writel(slot->host, PWREN, regs); break; case MMC_POWER_OFF: + if (!IS_ERR(mmc->supply.vmmc)) + mmc_regulator_set_ocr(mmc, mmc->supply.vmmc, 0); + + if (!IS_ERR(mmc->supply.vqmmc) && slot->host->vqmmc_enabled) { + regulator_disable(mmc->supply.vqmmc); + slot->host->vqmmc_enabled = false; + } + regs = mci_readl(slot->host, PWREN); regs &= ~(1 << slot->id); mci_writel(slot->host, PWREN, regs); @@ -2110,7 +2137,13 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id) mmc->f_max = freq[1]; } - mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; + /*if there are external regulators, get them*/ + ret = mmc_regulator_get_supply(mmc); + if (ret == -EPROBE_DEFER) + goto err_setup_bus; + + if (!mmc->ocr_avail) + mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34; if (host->pdata->caps) mmc->caps = host->pdata->caps; @@ -2176,7 +2209,7 @@ static int dw_mci_init_slot(struct dw_mci *host, unsigned int id) err_setup_bus: mmc_free_host(mmc); - return -EINVAL; + return ret; } static void dw_mci_cleanup_slot(struct dw_mci_slot *slot, unsigned int id) @@ -2469,24 +2502,6 @@ int dw_mci_probe(struct dw_mci *host) } } - host->vmmc = devm_regulator_get_optional(host->dev, "vmmc"); - if (IS_ERR(host->vmmc)) { - ret = PTR_ERR(host->vmmc); - if (ret == -EPROBE_DEFER) - goto err_clk_ciu; - - dev_info(host->dev, "no vmmc regulator found: %d\n", ret); - host->vmmc = NULL; - } else { - ret = regulator_enable(host->vmmc); - if (ret) { - if (ret != -EPROBE_DEFER) - dev_err(host->dev, - "regulator_enable fail: %d\n", ret); - goto err_clk_ciu; - } - } - host->quirks = host->pdata->quirks; spin_lock_init(&host->lock); @@ -2630,8 +2645,6 @@ err_workqueue: err_dmaunmap: if (host->use_dma && host->dma_ops->exit) host->dma_ops->exit(host); - if (host->vmmc) - regulator_disable(host->vmmc); err_clk_ciu: if (!IS_ERR(host->ciu_clk)) @@ -2667,9 +2680,6 @@ void dw_mci_remove(struct dw_mci *host) if (host->use_dma && host->dma_ops->exit) host->dma_ops->exit(host); - if (host->vmmc) - regulator_disable(host->vmmc); - if (!IS_ERR(host->ciu_clk)) clk_disable_unprepare(host->ciu_clk); @@ -2686,9 +2696,6 @@ EXPORT_SYMBOL(dw_mci_remove); */ int dw_mci_suspend(struct dw_mci *host) { - if (host->vmmc) - regulator_disable(host->vmmc); - return 0; } EXPORT_SYMBOL(dw_mci_suspend); @@ -2697,15 +2704,6 @@ int dw_mci_resume(struct dw_mci *host) { int i, ret; - if (host->vmmc) { - ret = regulator_enable(host->vmmc); - if (ret) { - dev_err(host->dev, - "failed to enable regulator: %d\n", ret); - return ret; - } - } - if (!dw_mci_ctrl_reset(host, SDMMC_CTRL_ALL_RESET_FLAGS)) { ret = -ENODEV; return ret; diff --git a/include/linux/mmc/dw_mmc.h b/include/linux/mmc/dw_mmc.h index 29ce014..84e2827 100644 --- a/include/linux/mmc/dw_mmc.h +++ b/include/linux/mmc/dw_mmc.h @@ -188,7 +188,7 @@ struct dw_mci { /* Workaround flags */ u32 quirks; - struct regulator *vmmc; /* Power regulator */ + bool vqmmc_enabled; unsigned long irq_flags; /* IRQ flags */ int irq; };