linux-kernel - [RFC PATCH 07/15] Bluetooth: hci_qca: merge qca_power_on with qca_regulators

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Message-Id: <20210817005507.1507580-8-dmitry.baryshkov@linaro.org>
Date:   Tue, 17 Aug 2021 03:54:59 +0300
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Johan Hedberg <johan.hedberg@...il.com>,
        Luiz Augusto von Dentz <luiz.dentz@...il.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Stanimir Varbanov <svarbanov@...sol.com>
Cc:     linux-arm-msm@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        ath10k@...ts.infradead.org, linux-wireless@...r.kernel.org,
        netdev@...r.kernel.org
Subject: [RFC PATCH 07/15] Bluetooth: hci_qca: merge qca_power_on with qca_regulators_init

With wcn6750 support added, regulator-based code was extended with the
bt_en gpio support. Now there is no need to keep regulator and
non-regulator code paths separate. Merge both code paths.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
---
 drivers/bluetooth/hci_qca.c | 64 ++++++++++++++-----------------------
 1 file changed, 24 insertions(+), 40 deletions(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 279b802f0952..ad7e8cdc94f3 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1583,13 +1583,21 @@ static bool qca_prevent_wake(struct hci_dev *hdev)
 	return !wakeup;
 }
 
-static int qca_regulator_init(struct hci_uart *hu)
+static int qca_power_on(struct hci_dev *hdev)
 {
+	struct hci_uart *hu = hci_get_drvdata(hdev);
 	enum qca_btsoc_type soc_type = qca_soc_type(hu);
 	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
+	 */
+	if (!hu->serdev)
+		return 0;
+
 	/* Check for vregs status, may be hci down has turned
 	 * off the voltage regulator.
 	 */
@@ -1607,27 +1615,29 @@ static int qca_regulator_init(struct hci_uart *hu)
 		}
 	}
 
-	if (qca_is_wcn399x(soc_type)) {
-		/* Forcefully enable wcn399x to enter in to boot mode. */
-		host_set_baudrate(hu, 2400);
-		ret = qca_send_power_pulse(hu, false);
-		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(50);
+		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);
 		}
 	}
 
-	qca_set_speed(hu, QCA_INIT_SPEED);
+	if (qca_is_wcn399x(soc_type)) {
+		/* Forcefully enable wcn399x to enter in to boot mode. */
+		host_set_baudrate(hu, 2400);
+		ret = qca_send_power_pulse(hu, false);
+		if (ret)
+			return ret;
+	}
+
+	if (qca_is_wcn399x(soc_type) ||
+	    qca_is_wcn6750(soc_type))
+		qca_set_speed(hu, QCA_INIT_SPEED);
 
 	if (qca_is_wcn399x(soc_type)) {
 		ret = qca_send_power_pulse(hu, true);
@@ -1647,38 +1657,12 @@ static int qca_regulator_init(struct hci_uart *hu)
 		return ret;
 	}
 
-	hci_uart_set_flow_control(hu, false);
-
-	return 0;
-}
-
-static int qca_power_on(struct hci_dev *hdev)
-{
-	struct hci_uart *hu = hci_get_drvdata(hdev);
-	enum qca_btsoc_type soc_type = qca_soc_type(hu);
-	struct qca_serdev *qcadev;
-	struct qca_data *qca = hu->priv;
-	int ret = 0;
-
-	/* Non-serdev device usually is powered by external power
-	 * and don't need additional action in driver for power on
-	 */
-	if (!hu->serdev)
-		return 0;
-
 	if (qca_is_wcn399x(soc_type) ||
-	    qca_is_wcn6750(soc_type)) {
-		ret = qca_regulator_init(hu);
-	} else {
-		qcadev = serdev_device_get_drvdata(hu->serdev);
-		if (qcadev->bt_en) {
-			gpiod_set_value_cansleep(qcadev->bt_en, 1);
-			/* Controller needs time to bootup. */
-			msleep(150);
-		}
-	}
+	    qca_is_wcn6750(soc_type))
+		hci_uart_set_flow_control(hu, false);
 
 	clear_bit(QCA_BT_OFF, &qca->flags);
+
 	return ret;
 }
 
-- 
2.30.2