From patchwork Tue Aug 17 00:55:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 498176 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DA117C4338F for ; Tue, 17 Aug 2021 00:56:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C544D6044F for ; Tue, 17 Aug 2021 00:56:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236043AbhHQA4G (ORCPT ); Mon, 16 Aug 2021 20:56:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40106 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236050AbhHQAzy (ORCPT ); Mon, 16 Aug 2021 20:55:54 -0400 Received: from mail-lj1-x236.google.com (mail-lj1-x236.google.com [IPv6:2a00:1450:4864:20::236]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 699A6C06124A for ; Mon, 16 Aug 2021 17:55:21 -0700 (PDT) Received: by mail-lj1-x236.google.com with SMTP id h9so30119150ljq.8 for ; Mon, 16 Aug 2021 17:55:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=7qagkQtaTlZmPxAEgYPi9rpyWnwBJTQJebKsAKhdvfc=; b=bPom6hkXdRt2fzsZMrGQmnn9MtSyxylCOyNHRvgpVhawiJNrQh6QUqc9ih5gcp1PF6 x7+c0V9DfcVHe25Z00kgH9T2ng5nSvCBz+o704oipZiwi9g3Q79aomTtYCVE5rKr2XID isIpULaSopsDHVzvsUaGca7+jYh21REPOXKcvjZZGkmiuKDdDMalE24Btv637HBybtde t/oUVFkzkQdO3xkPAa1rKVrvYHSiS5YVlrimA71K0GOp0sLQSWff7XvQCNLH8ZIoI4OM Vibzz8QCOKSRXuoZjssW8pbA1Sg2PRC097Zq5t0AlYgDWr4OE5w7ViGN5v013nB2yfv5 yl8w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=7qagkQtaTlZmPxAEgYPi9rpyWnwBJTQJebKsAKhdvfc=; b=n6KONAs5utAB73VRVoqO/zOQGqY2eUDu01BhhxhWNe/AU/0qidXGfYiwxRdmMqdSkm GQY4FhIZ+Cg++HlRrIPSkA7vjbP8jZaJLhXx+BtuKpimGZjyxW/URfb1AYbyBL1fGml5 VexWPAnvHhjmMUmNdHAV5gNqA7zdzeEWVLnvr7t52dc2sHYIA5EJbk5BNsaWfc5i75z/ 6p0+cQLxJxwMba7XJp2mfqP4OuKx3S8dFaimIJdgMYyYhqvY5eX+foXurvN8Xug0rxox EDcXLqZMZKRjwKLxpFTsJkTTWQSW/Wvfqm6bbQr0kai5FtwV2XMutd+0JWe9ZEZWnDzO 9uug== X-Gm-Message-State: AOAM531zKt3pjLAA6iXq1Ahgfq5Z8X0/Uls2RFekjokpS7/1v+4KSI+I IbTLku1qbEBBODJuD0D18h088Q== X-Google-Smtp-Source: ABdhPJy0Vxzbay2lg9uLfmPVEif7TuCf//2e8I2PdIm8X8c7CC97prs3p0qNiSFLC6TRElLB99wqvQ== X-Received: by 2002:a2e:9751:: with SMTP id f17mr777675ljj.422.1629161719792; Mon, 16 Aug 2021 17:55:19 -0700 (PDT) Received: from eriador.lan ([37.153.55.125]) by smtp.gmail.com with ESMTPSA id z6sm40719lfb.251.2021.08.16.17.55.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 Aug 2021 17:55:19 -0700 (PDT) From: Dmitry Baryshkov To: Andy Gross , Bjorn Andersson , Ulf Hansson , Marcel Holtmann , Johan Hedberg , Luiz Augusto von Dentz , Kalle Valo , "David S. Miller" , Jakub Kicinski , Stanimir Varbanov Cc: linux-arm-msm@vger.kernel.org, linux-mmc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-bluetooth@vger.kernel.org, ath10k@lists.infradead.org, linux-wireless@vger.kernel.org, netdev@vger.kernel.org Subject: [RFC PATCH 08/15] Bluetooth: hci_qca: futher rework of power on/off handling Date: Tue, 17 Aug 2021 03:55:00 +0300 Message-Id: <20210817005507.1507580-9-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210817005507.1507580-1-dmitry.baryshkov@linaro.org> References: <20210817005507.1507580-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Further rework of power on/off handling. Move bt_en and sw_ctl handling close to regulator enable/disable, so that this code can be easily extended with pwrseq support. Signed-off-by: Dmitry Baryshkov --- drivers/bluetooth/hci_qca.c | 126 +++++++++++++++++++----------------- 1 file changed, 66 insertions(+), 60 deletions(-) diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index ad7e8cdc94f3..2d23e8a3ca14 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -1590,7 +1590,6 @@ static int qca_power_on(struct hci_dev *hdev) struct qca_serdev *qcadev; struct qca_data *qca = hu->priv; int ret; - bool sw_ctrl_state; /* Non-serdev device usually is powered by external power * and don't need additional action in driver for power on @@ -1602,29 +1601,15 @@ static int qca_power_on(struct hci_dev *hdev) * off the voltage regulator. */ qcadev = serdev_device_get_drvdata(hu->serdev); - if (!qcadev->vregs_on) { - serdev_device_close(hu->serdev); - ret = qca_regulator_enable(qcadev); - if (ret) - return ret; - - ret = serdev_device_open(hu->serdev); - if (ret) { - bt_dev_err(hu->hdev, "failed to open port"); - return ret; - } - } + serdev_device_close(hu->serdev); + ret = qca_regulator_enable(qcadev); + if (ret) + return ret; - /* For wcn6750 need to enable gpio bt_en */ - if (qcadev->bt_en) { - gpiod_set_value_cansleep(qcadev->bt_en, 0); - msleep(50); - gpiod_set_value_cansleep(qcadev->bt_en, 1); - msleep(150); - if (qcadev->sw_ctrl) { - sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl); - bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state); - } + ret = serdev_device_open(hu->serdev); + if (ret) { + bt_dev_err(hu->hdev, "failed to open port"); + return ret; } if (qca_is_wcn399x(soc_type)) { @@ -1856,7 +1841,6 @@ static void qca_power_shutdown(struct hci_uart *hu) struct qca_data *qca = hu->priv; unsigned long flags; enum qca_btsoc_type soc_type = qca_soc_type(hu); - bool sw_ctrl_state; /* From this point we go into power off state. But serial port is * still open, stop queueing the IBS data and flush all the buffered @@ -1878,18 +1862,8 @@ static void qca_power_shutdown(struct hci_uart *hu) if (qca_is_wcn399x(soc_type)) { host_set_baudrate(hu, 2400); qca_send_power_pulse(hu, false); - qca_regulator_disable(qcadev); - } else if (soc_type == QCA_WCN6750) { - gpiod_set_value_cansleep(qcadev->bt_en, 0); - msleep(100); - qca_regulator_disable(qcadev); - if (qcadev->sw_ctrl) { - sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl); - bt_dev_dbg(hu->hdev, "SW_CTRL is %d", sw_ctrl_state); - } - } else if (qcadev->bt_en) { - gpiod_set_value_cansleep(qcadev->bt_en, 0); } + qca_regulator_disable(qcadev); set_bit(QCA_BT_OFF, &qca->flags); } @@ -1919,20 +1893,39 @@ static int qca_regulator_enable(struct qca_serdev *qcadev) int ret; /* Already enabled */ - if (qcadev->vregs_on) - return 0; + if (!qcadev->vregs_on) { + BT_DBG("enabling %d regulators)", qcadev->num_vregs); - BT_DBG("enabling %d regulators)", qcadev->num_vregs); + ret = regulator_bulk_enable(qcadev->num_vregs, qcadev->vreg_bulk); + if (ret) + return ret; - ret = regulator_bulk_enable(qcadev->num_vregs, qcadev->vreg_bulk); - if (ret) - return ret; + qcadev->vregs_on = true; - qcadev->vregs_on = true; + if (qca_is_wcn399x(qcadev->btsoc_type) || + qca_is_wcn6750(qcadev->btsoc_type)) { + ret = clk_prepare_enable(qcadev->susclk); + if (ret) { + regulator_bulk_disable(qcadev->num_vregs, qcadev->vreg_bulk); + return ret; + } + } + } - ret = clk_prepare_enable(qcadev->susclk); - if (ret) - qca_regulator_disable(qcadev); + /* For wcn6750 need to enable gpio bt_en */ + if (qcadev->bt_en) { + gpiod_set_value_cansleep(qcadev->bt_en, 0); + msleep(50); + gpiod_set_value_cansleep(qcadev->bt_en, 1); + msleep(150); + } + + if (qcadev->sw_ctrl) { + bool sw_ctrl_state; + + sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl); + bt_dev_dbg(qcadev->serdev_hu.hdev, "SW_CTRL is %d", sw_ctrl_state); + } return ret; } @@ -1942,14 +1935,27 @@ static void qca_regulator_disable(struct qca_serdev *qcadev) if (!qcadev) return; + if (qcadev->bt_en) { + gpiod_set_value_cansleep(qcadev->bt_en, 0); + msleep(100); + } + /* Already disabled? */ - if (!qcadev->vregs_on) - return; + if (qcadev->vregs_on) { + regulator_bulk_disable(qcadev->num_vregs, qcadev->vreg_bulk); + qcadev->vregs_on = false; - regulator_bulk_disable(qcadev->num_vregs, qcadev->vreg_bulk); - qcadev->vregs_on = false; + if (qca_is_wcn399x(qcadev->btsoc_type) || + qca_is_wcn6750(qcadev->btsoc_type)) + clk_disable_unprepare(qcadev->susclk); + } + + if (qcadev->sw_ctrl) { + bool sw_ctrl_state; - clk_disable_unprepare(qcadev->susclk); + sw_ctrl_state = gpiod_get_value_cansleep(qcadev->sw_ctrl); + bt_dev_dbg(qcadev->serdev_hu.hdev, "SW_CTRL is %d", sw_ctrl_state); + } } static int qca_init_regulators(struct qca_serdev *qcadev, struct device *dev, @@ -2018,17 +2024,17 @@ static int qca_serdev_probe(struct serdev_device *serdev) } qcadev->vregs_on = false; - } - qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable", - GPIOD_OUT_LOW); - if (!qcadev->bt_en) { - if (qca_is_wcn6750(data->soc_type)) { - dev_err(&serdev->dev, "failed to acquire BT_EN gpio\n"); - power_ctrl_enabled = false; - } else if (!qca_is_wcn399x(data->soc_type)) { - dev_warn(&serdev->dev, "failed to acquire enable gpio\n"); - power_ctrl_enabled = false; + qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable", + GPIOD_OUT_LOW); + if (!qcadev->bt_en) { + if (qca_is_wcn6750(data->soc_type)) { + dev_err(&serdev->dev, "failed to acquire BT_EN gpio\n"); + power_ctrl_enabled = false; + } else if (!qca_is_wcn399x(data->soc_type)) { + dev_warn(&serdev->dev, "failed to acquire enable gpio\n"); + power_ctrl_enabled = false; + } } }