From patchwork Fri Jun 12 23:19:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wesley Cheng X-Patchwork-Id: 11602373 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id A40CA618 for ; Fri, 12 Jun 2020 23:19:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 85D7D206D7 for ; Fri, 12 Jun 2020 23:19:36 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="EIPK0Yqp" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726462AbgFLXTe (ORCPT ); Fri, 12 Jun 2020 19:19:34 -0400 Received: from mail27.static.mailgun.info ([104.130.122.27]:50135 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726372AbgFLXTc (ORCPT ); Fri, 12 Jun 2020 19:19:32 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1592003971; h=Content-Transfer-Encoding: MIME-Version: References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=4YGkZbsKguGnYpKIS69O19O/+T6nme5gPEwJRcvkS+0=; b=EIPK0YqpRwtgcy2zHs8hpQ8vh3toQH/vtSMGI8UER8PSVt2+J8SadFARi4rUO7cJPAlK/4Lh N0CGzWE3VThmmYbFKGMHks4qoZKuQnaxKybQ5wrp0vsKW9M0zZ/7xiXPQDS1AAxUXGyQ9UL/ ont5phdNYG4MucYVfFubn/NUU30= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyIxZTE2YSIsICJsaW51eC11c2JAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n09.prod.us-west-2.postgun.com with SMTP id 5ee40d80fe1db4db89088b35 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Fri, 12 Jun 2020 23:19:28 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id A347DC4339C; Fri, 12 Jun 2020 23:19:28 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.0 Received: from wcheng-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: wcheng) by smtp.codeaurora.org (Postfix) with ESMTPSA id D21BCC433CB; Fri, 12 Jun 2020 23:19:26 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org D21BCC433CB Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=wcheng@codeaurora.org From: Wesley Cheng To: robh+dt@kernel.org, heikki.krogerus@linux.intel.com, gregkh@linuxfoundation.org, mark.rutland@arm.com, broonie@kernel.org, lgirdwood@gmail.com, agross@kernel.org, bjorn.andersson@linaro.org Cc: linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-usb@vger.kernel.org, lijun.kernel@gmail.com, rdunlap@infradead.org, jackp@codeaurora.org, bryan.odonoghue@linaro.org, Wesley Cheng Subject: [PATCH v2 4/6] regulator: Add support for QCOM PMIC VBUS booster Date: Fri, 12 Jun 2020 16:19:16 -0700 Message-Id: <20200612231918.8001-5-wcheng@codeaurora.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200612231918.8001-1-wcheng@codeaurora.org> References: <20200612231918.8001-1-wcheng@codeaurora.org> MIME-Version: 1.0 Sender: linux-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org Some Qualcomm PMICs have the capability to source the VBUS output to connected peripherals. This driver will register a regulator to the regulator list to enable or disable this source by an external driver. Signed-off-by: Wesley Cheng --- drivers/regulator/Kconfig | 10 ++ drivers/regulator/Makefile | 1 + drivers/regulator/qcom_usb_vbus-regulator.c | 147 ++++++++++++++++++++ 3 files changed, 158 insertions(+) create mode 100644 drivers/regulator/qcom_usb_vbus-regulator.c diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig index 074a2ef55943..f9165f9f9051 100644 --- a/drivers/regulator/Kconfig +++ b/drivers/regulator/Kconfig @@ -797,6 +797,16 @@ config REGULATOR_QCOM_SPMI Qualcomm SPMI PMICs as a module. The module will be named "qcom_spmi-regulator". +config REGULATOR_QCOM_USB_VBUS + tristate "Qualcomm USB Vbus regulator driver" + depends on SPMI || COMPILE_TEST + help + If you say yes to this option, support will be included for the + regulator used to enable the VBUS output. + + Say M here if you want to include support for enabling the VBUS output + as a module. The module will be named "qcom_usb-regulator". + config REGULATOR_RC5T583 tristate "RICOH RC5T583 Power regulators" depends on MFD_RC5T583 diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile index c0d6b96ebd78..cbab28aa7b56 100644 --- a/drivers/regulator/Makefile +++ b/drivers/regulator/Makefile @@ -89,6 +89,7 @@ obj-$(CONFIG_REGULATOR_QCOM_RPM) += qcom_rpm-regulator.o obj-$(CONFIG_REGULATOR_QCOM_RPMH) += qcom-rpmh-regulator.o obj-$(CONFIG_REGULATOR_QCOM_SMD_RPM) += qcom_smd-regulator.o obj-$(CONFIG_REGULATOR_QCOM_SPMI) += qcom_spmi-regulator.o +obj-$(CONFIG_REGULATOR_QCOM_USB_VBUS) += qcom_usb_vbus-regulator.o obj-$(CONFIG_REGULATOR_PALMAS) += palmas-regulator.o obj-$(CONFIG_REGULATOR_PFUZE100) += pfuze100-regulator.o obj-$(CONFIG_REGULATOR_PV88060) += pv88060-regulator.o diff --git a/drivers/regulator/qcom_usb_vbus-regulator.c b/drivers/regulator/qcom_usb_vbus-regulator.c new file mode 100644 index 000000000000..2b8129a04684 --- /dev/null +++ b/drivers/regulator/qcom_usb_vbus-regulator.c @@ -0,0 +1,147 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2020, The Linux Foundation. All rights reserved. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define CMD_OTG 0x40 +#define OTG_EN BIT(0) +#define OTG_CFG 0x53 +#define OTG_EN_SRC_CFG BIT(1) + +struct qcom_vbus { + struct device *dev; + u32 base; + struct regmap *regmap; + struct regulator_dev *usb_vbus_reg; +}; + +static int qcom_usb_vbus_enable(struct regulator_dev *rdev) +{ + struct qcom_vbus *vbus_out = rdev_get_drvdata(rdev); + int rc; + + rc = regmap_update_bits(vbus_out->regmap, vbus_out->base + CMD_OTG, + OTG_EN, OTG_EN); + if (rc) + dev_err(vbus_out->dev, "failed to enable usb_vbus\n"); + + return rc; +} + +static int qcom_usb_vbus_disable(struct regulator_dev *rdev) +{ + struct qcom_vbus *vbus_out = rdev_get_drvdata(rdev); + int rc; + + rc = regmap_update_bits(vbus_out->regmap, vbus_out->base + CMD_OTG, + OTG_EN, 0); + if (rc) + dev_err(vbus_out->dev, "failed to disable usb_vbus\n"); + + return rc; +} + +static int qcom_usb_vbus_is_enabled(struct regulator_dev *rdev) +{ + struct qcom_vbus *vbus_out = rdev_get_drvdata(rdev); + unsigned int value = 0; + int rc; + + rc = regmap_read(vbus_out->regmap, vbus_out->base + CMD_OTG, &value); + if (rc) + dev_err(vbus_out->dev, "failed to read OTG_CTL\n"); + + return !!(value & OTG_EN); +} + +static const struct regulator_ops qcom_usb_vbus_reg_ops = { + .enable = qcom_usb_vbus_enable, + .disable = qcom_usb_vbus_disable, + .is_enabled = qcom_usb_vbus_is_enabled, +}; + +static const struct regulator_desc qcom_usb_vbus_rdesc = { + .name = "usb_vbus", + .ops = &qcom_usb_vbus_reg_ops, + .owner = THIS_MODULE, + .type = REGULATOR_VOLTAGE, +}; + +static const struct of_device_id qcom_usb_vbus_regulator_match[] = { + { .compatible = "qcom,pm8150b-vbus-reg" }, + { } +}; +MODULE_DEVICE_TABLE(of, qcom_usb_vbus_regulator_match); + +static int qcom_usb_vbus_regulator_probe(struct platform_device *pdev) +{ + struct qcom_vbus *vbus_out; + struct device *dev = &pdev->dev; + struct regulator_config config = { }; + struct regulator_init_data init_data = { }; + int ret; + u32 reg; + + ret = of_property_read_u32(dev->of_node, "reg", ®); + if (ret < 0) { + dev_err(dev, "no base address found\n"); + return ret; + } + + vbus_out = devm_kzalloc(dev, sizeof(vbus_out), GFP_KERNEL); + if (!vbus_out) + return -ENOMEM; + vbus_out->base = reg; + vbus_out->dev = dev; + + vbus_out->regmap = dev_get_regmap(dev->parent, NULL); + if (!vbus_out->regmap) { + dev_err(dev, "Failed to get regmap\n"); + return -ENOENT; + } + + init_data.constraints.valid_ops_mask |= REGULATOR_CHANGE_STATUS; + config.dev = dev; + config.driver_data = vbus_out; + config.init_data = &init_data; + + vbus_out->usb_vbus_reg = devm_regulator_register(dev, + &qcom_usb_vbus_rdesc, + &config); + if (IS_ERR(vbus_out->usb_vbus_reg)) { + ret = PTR_ERR(vbus_out->usb_vbus_reg); + dev_err(dev, "not able to register vbus reg %d\n", ret); + return ret; + } + + /* Disable HW logic for VBUS enable */ + regmap_update_bits(vbus_out->regmap, vbus_out->base + OTG_CFG, + OTG_EN_SRC_CFG, 0); + + return 0; +} + +static struct platform_driver qcom_usb_vbus_regulator_driver = { + .driver = { + .name = "qcom-usb-vbus-regulator", + .of_match_table = qcom_usb_vbus_regulator_match, + }, + .probe = qcom_usb_vbus_regulator_probe, +}; +module_platform_driver(qcom_usb_vbus_regulator_driver); + +MODULE_DESCRIPTION("Qualcomm USB vbus regulator driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:qcom-usb-vbus-regulator");