From patchwork Mon Jan 13 15:36:12 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Balaji T K X-Patchwork-Id: 3476821 Return-Path: X-Original-To: patchwork-linux-omap@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 D7569C02DD for ; Mon, 13 Jan 2014 15:36:47 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 09A732011E for ; Mon, 13 Jan 2014 15:36:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0CC5C20114 for ; Mon, 13 Jan 2014 15:36:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751916AbaAMPgo (ORCPT ); Mon, 13 Jan 2014 10:36:44 -0500 Received: from bear.ext.ti.com ([192.94.94.41]:40956 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751890AbaAMPgn (ORCPT ); Mon, 13 Jan 2014 10:36:43 -0500 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id s0DFaXW2011812; Mon, 13 Jan 2014 09:36:33 -0600 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id s0DFaXVE003667; Mon, 13 Jan 2014 09:36:33 -0600 Received: from dlep32.itg.ti.com (157.170.170.100) by DFLE72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.2.342.3; Mon, 13 Jan 2014 09:36:32 -0600 Received: from ulaa0393241.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id s0DFaI21031216; Mon, 13 Jan 2014 09:36:30 -0600 From: Balaji T K To: , , , , , , CC: Balaji T K Subject: [PATCH v10 4/7] mmc: omap_hsmmc: adapt hsmmc to use pbias regulator Date: Mon, 13 Jan 2014 21:06:12 +0530 Message-ID: <1389627375-9107-5-git-send-email-balajitk@ti.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1389627375-9107-1-git-send-email-balajitk@ti.com> References: <1389279062-32291-1-git-send-email-balajitk@ti.com> <1389627375-9107-1-git-send-email-balajitk@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-7.0 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 In DT case, PBAIS registers are programmed via regulator, use regulator APIs to control PBIAS. Signed-off-by: Balaji T K --- drivers/mmc/host/omap_hsmmc.c | 37 +++++++++++++++++++++++++++++++++++++ 1 files changed, 37 insertions(+), 0 deletions(-) diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c index 342be25..2287bda 100644 --- a/drivers/mmc/host/omap_hsmmc.c +++ b/drivers/mmc/host/omap_hsmmc.c @@ -126,6 +126,10 @@ #define OMAP_MMC_MAX_CLOCK 52000000 #define DRIVER_NAME "omap_hsmmc" +#define VDD_1V8 1800000 /* 180000 uV */ +#define VDD_3V0 3000000 /* 300000 uV */ +#define VDD_165_195 (ffs(MMC_VDD_165_195) - 1) + /* * One controller can have multiple slots, like on some omap boards using * omap.c controller driver. Luckily this is not currently done on any known @@ -164,6 +168,8 @@ struct omap_hsmmc_host { */ struct regulator *vcc; struct regulator *vcc_aux; + struct regulator *pbias; + bool pbias_enabled; int pbias_disable; void __iomem *base; resource_size_t mapbase; @@ -272,6 +278,15 @@ static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on, if (mmc_slot(host).before_set_reg) mmc_slot(host).before_set_reg(dev, slot, power_on, vdd); + if (host->pbias) { + if (host->pbias_enabled == 1) { + ret = regulator_disable(host->pbias); + if (!ret) + host->pbias_enabled = 0; + } + regulator_set_voltage(host->pbias, VDD_3V0, VDD_3V0); + } + /* * Assume Vcc regulator is used only to power the card ... OMAP * VDDS is used to power the pins, optionally with a transceiver to @@ -306,9 +321,27 @@ static int omap_hsmmc_set_power(struct device *dev, int slot, int power_on, } } + if (host->pbias) { + if (vdd <= VDD_165_195) + ret = regulator_set_voltage(host->pbias, VDD_1V8, + VDD_1V8); + else + ret = regulator_set_voltage(host->pbias, VDD_3V0, + VDD_3V0); + if (ret < 0) + goto error_set_power; + + if (host->pbias_enabled == 0) { + ret = regulator_enable(host->pbias); + if (!ret) + host->pbias_enabled = 1; + } + } + if (mmc_slot(host).after_set_reg) mmc_slot(host).after_set_reg(dev, slot, power_on, vdd); +error_set_power: return ret; } @@ -342,6 +375,9 @@ static int omap_hsmmc_reg_get(struct omap_hsmmc_host *host) reg = devm_regulator_get_optional(host->dev, "vmmc_aux"); host->vcc_aux = IS_ERR(reg) ? NULL : reg; + reg = devm_regulator_get_optional(host->dev, "pbias"); + host->pbias = IS_ERR(reg) ? NULL : reg; + /* For eMMC do not power off when not in sleep state */ if (mmc_slot(host).no_regulator_off_init) return 0; @@ -1808,6 +1844,7 @@ static int omap_hsmmc_probe(struct platform_device *pdev) host->base = ioremap(host->mapbase, SZ_4K); host->power_mode = MMC_POWER_OFF; host->next_data.cookie = 1; + host->pbias_enabled = 0; platform_set_drvdata(pdev, host);