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[2001:1c06:2302:5600:12a8:8cf4:e3f6:f90f]) by smtp.gmail.com with ESMTPSA id g22-20020a1709064e5600b007c0688a68cbsm9013936ejw.176.2022.12.29.10.34.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Dec 2022 10:34:13 -0800 (PST) From: Bryan O'Donoghue To: agross@kernel.org, andersson@kernel.org, vkoul@kernel.org, kishon@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org Cc: konrad.dybcio@linaro.org, linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, bryan.odonoghue@linaro.org Subject: [PATCH v2 1/2] dt-bindings: phy: Add qcom,dp-manual-pullup description Date: Thu, 29 Dec 2022 18:34:09 +0000 Message-Id: <20221229183410.683584-2-bryan.odonoghue@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221229183410.683584-1-bryan.odonoghue@linaro.org> References: <20221229183410.683584-1-bryan.odonoghue@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The original Qualcomm driver for the HighSpeed USB PHY contains a flag which tells the driver that the controller and PHY do not connect to VBUS. In this case an external IC such as a Type-C port manager supplies VBUS and the VBUS signal is not routed to the SoC. This means we cannot detect the presence or absence of VBUS and cannot take action based on it. Document the downstream boolean qcom,dp-manual-pullup to allow the HS PHY implement the necessary logic. Signed-off-by: Bryan O'Donoghue --- Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.yaml | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.yaml index aa97478dd0161..c55a59df71ad0 100644 --- a/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.yaml +++ b/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.yaml @@ -80,6 +80,13 @@ properties: the address is offset from the ULPI_EXT_VENDOR_SPECIFIC address - description: value + qcom,dp-manual-pullup: + type: boolean + description: This flag indicates to the HS USB PHY driver that it should + enable or disable an internal pullup when powering on or + powering off the HS PHY instead of toggling the value when VBUS + is absent or present. + required: - clocks - clock-names From patchwork Thu Dec 29 18:34:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bryan O'Donoghue X-Patchwork-Id: 13083677 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A6A8DC54EBD for ; Thu, 29 Dec 2022 18:35:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234039AbiL2Sem (ORCPT ); Thu, 29 Dec 2022 13:34:42 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53376 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234023AbiL2SeR (ORCPT ); Thu, 29 Dec 2022 13:34:17 -0500 Received: from mail-ej1-x631.google.com (mail-ej1-x631.google.com [IPv6:2a00:1450:4864:20::631]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F3B24D124 for ; Thu, 29 Dec 2022 10:34:15 -0800 (PST) Received: by mail-ej1-x631.google.com with SMTP id t17so46810036eju.1 for ; Thu, 29 Dec 2022 10:34:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=qOwNzTdUKlF0YVErH+m4Hrlu8Y/CqgzRzrTuhq10EAc=; b=RpPdq2z8ewpQAJ+Pq0zFsE+golr0XOyCeAmQ8xF4SnuhD4fy8ggns0HkMbA9lvQlAp aVnP0Dxbo/eGyNh2LUIz/M06a2X1mMCyh9d/nKEIqcueDwVj1n/ADSztLB6cGDJcEtBr yeaC241RtYWYMMM2RuU3I0ONfM54CJEgGfnrvMXDiScWPqMn36xAXArGcG4uOFJO77nX zJQTj/7gPqJ+P7c++wPIcLhUk2wojbzpnIEn/Ijy4FW4RMuTMc9TxmSE+x3cP2zZ4OzF qlIkuB+/1eHikr40668fcd4xOaSd9shwA6grac+jhojdIWVB2HkgGCcn5xJSyUzLcOC9 4mzQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=qOwNzTdUKlF0YVErH+m4Hrlu8Y/CqgzRzrTuhq10EAc=; b=P5qNy/jdLcpVjq0x1b7tYNbXaU6DbRd0zqhW5MsiJ1V59YC62UXNei3gknXg8rNoJ1 C7klTerWheKk9aeMVjxz6UQ8JHRajW4a/1MQDUofMHYDSAXdMrEOumg5Er0iVPlFbmkF kZIoUiK3HKuWvpy3zxXo/FnxIPxTxoFYG+OW12ruPdniVq25Cdv+gKuY5B7BHRAqfJBp QGlR60v2Fe4h6PBiqNRc6spY0Lzu6bgZRezIv3bRpziCw0E7vV/Zns8WrZDh+xeMFzcO 4TUp/QjnH4UgoMUi0rDvPNbleVQ55C2QFl7q8Xbod4qCkHjrBkM7R+UzBBA4/sLyBDmy F4fQ== X-Gm-Message-State: AFqh2krLpfPQ9H2feL1f8bU5555p7mxR7SNyodwQQYgq/0PNWW4Z5ZbQ mQmIwELE4jJyunHki1v0vWwCNA== X-Google-Smtp-Source: AMrXdXvVMq4b7/E7hSZxnG5HN5oB/9/neiMONpxkkMMUQmt2TjO7i8r2qUhnlCxDRnksiZpVIL3ulg== X-Received: by 2002:a17:907:c70c:b0:81e:9027:dedc with SMTP id ty12-20020a170907c70c00b0081e9027dedcmr25356911ejc.39.1672338854528; Thu, 29 Dec 2022 10:34:14 -0800 (PST) Received: from planet9.chello.ie (2001-1c06-2302-5600-12a8-8cf4-e3f6-f90f.cable.dynamic.v6.ziggo.nl. [2001:1c06:2302:5600:12a8:8cf4:e3f6:f90f]) by smtp.gmail.com with ESMTPSA id g22-20020a1709064e5600b007c0688a68cbsm9013936ejw.176.2022.12.29.10.34.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 29 Dec 2022 10:34:14 -0800 (PST) From: Bryan O'Donoghue To: agross@kernel.org, andersson@kernel.org, vkoul@kernel.org, kishon@kernel.org, robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org Cc: konrad.dybcio@linaro.org, linux-arm-msm@vger.kernel.org, linux-phy@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, bryan.odonoghue@linaro.org Subject: [PATCH v2 2/2] phy: qcom-usb-hs: Add qcom,dp-manual-pullup logic Date: Thu, 29 Dec 2022 18:34:10 +0000 Message-Id: <20221229183410.683584-3-bryan.odonoghue@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20221229183410.683584-1-bryan.odonoghue@linaro.org> References: <20221229183410.683584-1-bryan.odonoghue@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Downstream has a flag called qcom,dp-manual-pullup which informs the downstream driver if it should toggle ULPI_MISC_A_VBUSVLDEXTSEL and ULPI_MISC_A_VBUSVLDEXT. Downstream states: "qcom,dp-manual-pullup: If present, vbus is not routed to USB controller/phy and controller driver therefore enables pull-up explicitly before starting controller using usbcmd run/stop bit." Working with a system that has both an external Type-C port controller and an internal USB Hub results in a situation where VBUS is not connected to the SoC. In this case we still need to set the DP pullup. This patch enables and disables the DP pullup on PHY power_on and power_off respectively if the DT has declared the bool "qcom,enable-vbus-pullup" effectively replicating the downstream logic to the same effect. Signed-off-by: Bryan O'Donoghue --- drivers/phy/qualcomm/phy-qcom-usb-hs.c | 36 ++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/drivers/phy/qualcomm/phy-qcom-usb-hs.c b/drivers/phy/qualcomm/phy-qcom-usb-hs.c index 53e46c220a3aa..45c94f6722c66 100644 --- a/drivers/phy/qualcomm/phy-qcom-usb-hs.c +++ b/drivers/phy/qualcomm/phy-qcom-usb-hs.c @@ -37,6 +37,7 @@ struct qcom_usb_hs_phy { struct ulpi_seq *init_seq; struct extcon_dev *vbus_edev; struct notifier_block vbus_notify; + u8 enable_dp_pullup:1; }; static int qcom_usb_hs_phy_set_mode(struct phy *phy, @@ -105,6 +106,23 @@ qcom_usb_hs_phy_vbus_notifier(struct notifier_block *nb, unsigned long event, return ulpi_write(uphy->ulpi, addr, ULPI_MISC_A_VBUSVLDEXT); } +static int qcom_usb_hs_phy_enable_dp_pullup(struct ulpi *ulpi, bool enable) +{ + u8 addr; + int ret; + + if (enable) + addr = ULPI_SET(ULPI_MISC_A); + else + addr = ULPI_CLR(ULPI_MISC_A); + + ret = ulpi_write(ulpi, addr, ULPI_MISC_A_VBUSVLDEXTSEL); + if (ret) + return ret; + + return ulpi_write(ulpi, addr, ULPI_MISC_A_VBUSVLDEXT); +} + static int qcom_usb_hs_phy_power_on(struct phy *phy) { struct qcom_usb_hs_phy *uphy = phy_get_drvdata(phy); @@ -154,6 +172,12 @@ static int qcom_usb_hs_phy_power_on(struct phy *phy) goto err_ulpi; } + if (uphy->enable_dp_pullup) { + ret = qcom_usb_hs_phy_enable_dp_pullup(ulpi, true); + if (ret) + goto err_ulpi; + } + if (uphy->vbus_edev) { state = extcon_get_state(uphy->vbus_edev, EXTCON_USB); /* setup initial state */ @@ -180,10 +204,19 @@ static int qcom_usb_hs_phy_power_on(struct phy *phy) static int qcom_usb_hs_phy_power_off(struct phy *phy) { struct qcom_usb_hs_phy *uphy = phy_get_drvdata(phy); + struct ulpi *ulpi = uphy->ulpi; + int ret; if (uphy->vbus_edev) extcon_unregister_notifier(uphy->vbus_edev, EXTCON_USB, &uphy->vbus_notify); + + if (uphy->enable_dp_pullup) { + ret = qcom_usb_hs_phy_enable_dp_pullup(ulpi, false); + if (ret) + return ret; + } + regulator_disable(uphy->v3p3); regulator_disable(uphy->v1p8); clk_disable_unprepare(uphy->sleep_clk); @@ -229,6 +262,9 @@ static int qcom_usb_hs_phy_probe(struct ulpi *ulpi) /* NUL terminate */ uphy->init_seq[size / 2].addr = uphy->init_seq[size / 2].val = 0; + if (of_property_read_bool(ulpi->dev.of_node, "qcom,dp-manual-pullup")) + uphy->enable_dp_pullup = 1; + uphy->ref_clk = clk = devm_clk_get(&ulpi->dev, "ref"); if (IS_ERR(clk)) return PTR_ERR(clk);