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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 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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; + } } } -- 2.30.2