Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965459AbbLOULg (ORCPT ); Tue, 15 Dec 2015 15:11:36 -0500 Received: from seldsegrel01.sonyericsson.com ([37.139.156.29]:3194 "EHLO SELDSEGREL01.sonyericsson.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933551AbbLOULa (ORCPT ); Tue, 15 Dec 2015 15:11:30 -0500 From: Tim Bird To: , , , , , , , , CC: , , , , , , Subject: [PATCH v4 2/3] power: qcom_smbb: Add otg regulator for control of vbus Date: Tue, 15 Dec 2015 11:52:11 -0800 Message-ID: <1450209132-20185-2-git-send-email-tim.bird@sonymobile.com> X-Mailer: git-send-email 2.6.3 In-Reply-To: <1450209132-20185-1-git-send-email-tim.bird@sonymobile.com> References: <1450209132-20185-1-git-send-email-tim.bird@sonymobile.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4112 Lines: 140 Add a regulator to control the OTG chargepath switch. This is used by USB code to control VBUS direction - out for host mode on the OTG port, and in for charging mode. Signed-off-by: Tim Bird --- Changes since v3: - changed DT node name to otg-vbus - removed fixed-voltage setup from otg regulator rdesc Changes since v1: - changed name of supply to remove underscores --- drivers/power/qcom_smbb.c | 72 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) diff --git a/drivers/power/qcom_smbb.c b/drivers/power/qcom_smbb.c index 5eb1e9e..8998f4d 100644 --- a/drivers/power/qcom_smbb.c +++ b/drivers/power/qcom_smbb.c @@ -34,6 +34,9 @@ #include #include #include +#include +#include +#include #define SMBB_CHG_VMAX 0x040 #define SMBB_CHG_VSAFE 0x041 @@ -71,6 +74,8 @@ #define BTC_CTRL_HOT_EXT_N BIT(0) #define SMBB_USB_IMAX 0x344 +#define SMBB_USB_OTG_CTL 0x348 +#define OTG_CTL_EN BIT(0) #define SMBB_USB_ENUM_TIMER_STOP 0x34e #define ENUM_TIMER_STOP BIT(0) #define SMBB_USB_SEC_ACCESS 0x3d0 @@ -123,6 +128,9 @@ struct smbb_charger { struct power_supply *dc_psy; struct power_supply *bat_psy; struct regmap *regmap; + + struct regulator_desc otg_rdesc; + struct regulator_dev *otg_reg; }; static int smbb_vbat_weak_fn(unsigned int index) @@ -778,12 +786,56 @@ static const struct power_supply_desc dc_psy_desc = { .property_is_writeable = smbb_charger_writable_property, }; +static int smbb_chg_otg_enable(struct regulator_dev *rdev) +{ + struct smbb_charger *chg = rdev_get_drvdata(rdev); + int rc; + + rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_USB_OTG_CTL, + OTG_CTL_EN, OTG_CTL_EN); + if (rc) + dev_err(chg->dev, "failed to update OTG_CTL\n"); + return rc; +} + +static int smbb_chg_otg_disable(struct regulator_dev *rdev) +{ + struct smbb_charger *chg = rdev_get_drvdata(rdev); + int rc; + + rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_USB_OTG_CTL, + OTG_CTL_EN, 0); + if (rc) + dev_err(chg->dev, "failed to update OTG_CTL\n"); + return rc; +} + +static int smbb_chg_otg_is_enabled(struct regulator_dev *rdev) +{ + struct smbb_charger *chg = rdev_get_drvdata(rdev); + unsigned int value = 0; + int rc; + + rc = regmap_read(chg->regmap, chg->addr + SMBB_USB_OTG_CTL, &value); + if (rc) + dev_err(chg->dev, "failed to read OTG_CTL\n"); + + return !!(value & OTG_CTL_EN); +} + +static struct regulator_ops smbb_chg_otg_ops = { + .enable = smbb_chg_otg_enable, + .disable = smbb_chg_otg_disable, + .is_enabled = smbb_chg_otg_is_enabled, +}; + static int smbb_charger_probe(struct platform_device *pdev) { struct power_supply_config bat_cfg = {}; struct power_supply_config usb_cfg = {}; struct power_supply_config dc_cfg = {}; struct smbb_charger *chg; + struct regulator_config config = { }; int rc, i; chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL); @@ -884,6 +936,26 @@ static int smbb_charger_probe(struct platform_device *pdev) } } + /* + * otg regulator is used to control VBUS voltage direction + * when USB switches between host and gadget mode + */ + chg->otg_rdesc.id = -1; + chg->otg_rdesc.name = "otg-vbus"; + chg->otg_rdesc.ops = &smbb_chg_otg_ops; + chg->otg_rdesc.owner = THIS_MODULE; + chg->otg_rdesc.type = REGULATOR_VOLTAGE; + chg->otg_rdesc.supply_name = "usb-otg-in"; + chg->otg_rdesc.of_match = "otg-vbus"; + + config.dev = &pdev->dev; + config.driver_data = chg; + + chg->otg_reg = devm_regulator_register(&pdev->dev, &chg->otg_rdesc, + &config); + if (IS_ERR(chg->otg_reg)) + return PTR_ERR(chg->otg_reg); + chg->jeita_ext_temp = of_property_read_bool(pdev->dev.of_node, "qcom,jeita-extended-temp-range"); -- 2.6.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/