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    Subject[PATCH v14 7/7] Bluetooth: hci_qca: Add support for Qualcomm Bluetooth chip wcn3990
    Date
    Add support to set voltage/current of various regulators
    to power up/down Bluetooth chip wcn3990.

    Signed-off-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>
    Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
    ---
    Changes in v14:
    * moved function call qca_read_soc_version() to qca_setup()

    Changes in v13:
    * updated review comments.

    Changes in v12:
    * removed retrying iteration loop in qca_wcn3990_init.

    Changes in v11:
    * removed support to read regulator currents from dts.
    * updated review comments.

    Changes in v10:
    * added support to read regulator currents from dts.
    * added support to try to connect with chip if it fails to respond to initial commands
    * updated review comments.

    changes in v9:
    * moved flow control to vendor and set_baudarte functions.
    * removed parent regs.

    changes in v8:
    * closing qca buffer, if qca_power_setup fails
    * chnaged ibs start timer function call location.
    * updated review comments.

    changes in v7:
    * addressed review comments.

    changes in v6:
    * Hooked up qca_power to qca_serdev.
    * renamed all the naming inconsistency functions with qca_*
    * leveraged common code of ROME for wcn3990.
    * created wrapper functions for re-usable blocks.
    * updated function of _*regulator_enable and _*regualtor_disable.
    * removed redundant comments and functions.
    * addressed review comments.

    Changes in v5:
    * updated regulator vddpa min_uV to 1304000.
    * addressed review comments.

    Changes in v4:
    * Segregated the changes of btqca from hci_qca
    * rebased all changes on top of bluetooth-next.
    * addressed review comments.
    ---
    drivers/bluetooth/btqca.h | 3 +
    drivers/bluetooth/hci_qca.c | 407 +++++++++++++++++++++++++++++++-----
    2 files changed, 363 insertions(+), 47 deletions(-)

    diff --git a/drivers/bluetooth/btqca.h b/drivers/bluetooth/btqca.h
    index a9c2779f3e07..0c01f375fe83 100644
    --- a/drivers/bluetooth/btqca.h
    +++ b/drivers/bluetooth/btqca.h
    @@ -37,6 +37,9 @@
    #define EDL_TAG_ID_HCI (17)
    #define EDL_TAG_ID_DEEP_SLEEP (27)

    +#define QCA_WCN3990_POWERON_PULSE 0xFC
    +#define QCA_WCN3990_POWEROFF_PULSE 0xC0
    +
    enum qca_bardrate {
    QCA_BAUDRATE_115200 = 0,
    QCA_BAUDRATE_57600,
    diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
    index a6e7d38ef931..b2c0a7c24d79 100644
    --- a/drivers/bluetooth/hci_qca.c
    +++ b/drivers/bluetooth/hci_qca.c
    @@ -5,7 +5,7 @@
    * protocol extension to H4.
    *
    * Copyright (C) 2007 Texas Instruments, Inc.
    - * Copyright (c) 2010, 2012 The Linux Foundation. All rights reserved.
    + * Copyright (c) 2010, 2012, 2018 The Linux Foundation. All rights reserved.
    *
    * Acknowledgements:
    * This file is based on hci_ll.c, which was...
    @@ -31,9 +31,14 @@
    #include <linux/kernel.h>
    #include <linux/clk.h>
    #include <linux/debugfs.h>
    +#include <linux/delay.h>
    +#include <linux/device.h>
    #include <linux/gpio/consumer.h>
    #include <linux/mod_devicetable.h>
    #include <linux/module.h>
    +#include <linux/of_device.h>
    +#include <linux/platform_device.h>
    +#include <linux/regulator/consumer.h>
    #include <linux/serdev.h>

    #include <net/bluetooth/bluetooth.h>
    @@ -124,12 +129,46 @@ enum qca_speed_type {
    QCA_OPER_SPEED
    };

    +/*
    + * Voltage regulator information required for configuring the
    + * QCA Bluetooth chipset
    + */
    +struct qca_vreg {
    + const char *name;
    + unsigned int min_uV;
    + unsigned int max_uV;
    + unsigned int load_uA;
    +};
    +
    +struct qca_vreg_data {
    + enum qca_btsoc_type soc_type;
    + struct qca_vreg *vregs;
    + size_t num_vregs;
    +};
    +
    +/*
    + * Platform data for the QCA Bluetooth power driver.
    + */
    +struct qca_power {
    + struct device *dev;
    + const struct qca_vreg_data *vreg_data;
    + struct regulator_bulk_data *vreg_bulk;
    + bool vregs_on;
    +};
    +
    struct qca_serdev {
    struct hci_uart serdev_hu;
    struct gpio_desc *bt_en;
    struct clk *susclk;
    + enum qca_btsoc_type btsoc_type;
    + struct qca_power *bt_power;
    + u32 init_speed;
    + u32 oper_speed;
    };

    +static int qca_power_setup(struct hci_uart *hu, bool on);
    +static void qca_power_shutdown(struct hci_dev *hdev);
    +
    static void __serial_clock_on(struct tty_struct *tty)
    {
    /* TODO: Some chipset requires to enable UART clock on client
    @@ -407,6 +446,7 @@ static int qca_open(struct hci_uart *hu)
    {
    struct qca_serdev *qcadev;
    struct qca_data *qca;
    + int ret;

    BT_DBG("hu %p qca_open", hu);

    @@ -458,19 +498,32 @@ static int qca_open(struct hci_uart *hu)

    hu->priv = qca;

    - timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0);
    - qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS;
    -
    - timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0);
    - qca->tx_idle_delay = IBS_TX_IDLE_TIMEOUT_MS;
    -
    if (hu->serdev) {
    serdev_device_open(hu->serdev);

    qcadev = serdev_device_get_drvdata(hu->serdev);
    - gpiod_set_value_cansleep(qcadev->bt_en, 1);
    + if (qcadev->btsoc_type != QCA_WCN3990) {
    + gpiod_set_value_cansleep(qcadev->bt_en, 1);
    + } else {
    + hu->init_speed = qcadev->init_speed;
    + hu->oper_speed = qcadev->oper_speed;
    + ret = qca_power_setup(hu, true);
    + if (ret) {
    + destroy_workqueue(qca->workqueue);
    + kfree_skb(qca->rx_skb);
    + hu->priv = NULL;
    + kfree(qca);
    + return ret;
    + }
    + }
    }

    + timer_setup(&qca->wake_retrans_timer, hci_ibs_wake_retrans_timeout, 0);
    + qca->wake_retrans = IBS_WAKE_RETRANS_TIMEOUT_MS;
    +
    + timer_setup(&qca->tx_idle_timer, hci_ibs_tx_idle_timeout, 0);
    + qca->tx_idle_delay = IBS_TX_IDLE_TIMEOUT_MS;
    +
    BT_DBG("HCI_UART_QCA open, tx_idle_delay=%u, wake_retrans=%u",
    qca->tx_idle_delay, qca->wake_retrans);

    @@ -554,10 +607,13 @@ static int qca_close(struct hci_uart *hu)
    qca->hu = NULL;

    if (hu->serdev) {
    - serdev_device_close(hu->serdev);
    -
    qcadev = serdev_device_get_drvdata(hu->serdev);
    - gpiod_set_value_cansleep(qcadev->bt_en, 0);
    + if (qcadev->btsoc_type == QCA_WCN3990)
    + qca_power_shutdown(hu->hdev);
    + else
    + gpiod_set_value_cansleep(qcadev->bt_en, 0);
    +
    + serdev_device_close(hu->serdev);
    }

    kfree_skb(qca->rx_skb);
    @@ -891,6 +947,7 @@ static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
    struct hci_uart *hu = hci_get_drvdata(hdev);
    struct qca_data *qca = hu->priv;
    struct sk_buff *skb;
    + struct qca_serdev *qcadev;
    u8 cmd[] = { 0x01, 0x48, 0xFC, 0x01, 0x00 };

    if (baudrate > QCA_BAUDRATE_3200000)
    @@ -904,6 +961,13 @@ static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
    return -ENOMEM;
    }

    + /* Disabling hardware flow control is mandatory while
    + * sending change baudrate request to wcn3990 SoC.
    + */
    + qcadev = serdev_device_get_drvdata(hu->serdev);
    + if (qcadev->btsoc_type == QCA_WCN3990)
    + hci_uart_set_flow_control(hu, true);
    +
    /* Assign commands to change baudrate and packet type. */
    skb_put_data(skb, cmd, sizeof(cmd));
    hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
    @@ -919,6 +983,9 @@ static int qca_set_baudrate(struct hci_dev *hdev, uint8_t baudrate)
    schedule_timeout(msecs_to_jiffies(BAUDRATE_SETTLE_TIMEOUT_MS));
    set_current_state(TASK_RUNNING);

    + if (qcadev->btsoc_type == QCA_WCN3990)
    + hci_uart_set_flow_control(hu, false);
    +
    return 0;
    }

    @@ -930,6 +997,43 @@ static inline void host_set_baudrate(struct hci_uart *hu, unsigned int speed)
    hci_uart_set_baudrate(hu, speed);
    }

    +static int qca_send_power_pulse(struct hci_dev *hdev, u8 cmd)
    +{
    + struct hci_uart *hu = hci_get_drvdata(hdev);
    + struct qca_data *qca = hu->priv;
    + struct sk_buff *skb;
    +
    + /* These power pulses are single byte command which are sent
    + * at required baudrate to wcn3990. On wcn3990, we have an external
    + * circuit at Tx pin which decodes the pulse sent at specific baudrate.
    + * For example, wcn3990 supports RF COEX antenna for both Wi-Fi/BT
    + * and also we use the same power inputs to turn on and off for
    + * Wi-Fi/BT. Powering up the power sources will not enable BT, until
    + * we send a power on pulse at 115200 bps. This algorithm will help to
    + * save power. Disabling hardware flow control is mandatory while
    + * sending power pulses to SoC.
    + */
    + bt_dev_dbg(hdev, "sending power pulse %02x to SoC", cmd);
    +
    + skb = bt_skb_alloc(sizeof(cmd), GFP_KERNEL);
    + if (!skb)
    + return -ENOMEM;
    +
    + hci_uart_set_flow_control(hu, true);
    +
    + skb_put_u8(skb, cmd);
    + hci_skb_pkt_type(skb) = HCI_COMMAND_PKT;
    +
    + skb_queue_tail(&qca->txq, skb);
    + hci_uart_tx_wakeup(hu);
    +
    + /* Wait for 100 uS for SoC to settle down */
    + usleep_range(100, 200);
    + hci_uart_set_flow_control(hu, false);
    +
    + return 0;
    +}
    +
    static unsigned int qca_get_speed(struct hci_uart *hu,
    enum qca_speed_type speed_type)
    {
    @@ -952,9 +1056,18 @@ static unsigned int qca_get_speed(struct hci_uart *hu,

    static int qca_check_speeds(struct hci_uart *hu)
    {
    - if (!qca_get_speed(hu, QCA_INIT_SPEED) ||
    - !qca_get_speed(hu, QCA_OPER_SPEED))
    - return -EINVAL;
    + struct qca_serdev *qcadev;
    +
    + qcadev = serdev_device_get_drvdata(hu->serdev);
    + if (qcadev->btsoc_type == QCA_WCN3990) {
    + if (!qca_get_speed(hu, QCA_INIT_SPEED) &&
    + !qca_get_speed(hu, QCA_OPER_SPEED))
    + return -EINVAL;
    + } else {
    + if (!qca_get_speed(hu, QCA_INIT_SPEED) ||
    + !qca_get_speed(hu, QCA_OPER_SPEED))
    + return -EINVAL;
    + }

    return 0;
    }
    @@ -974,7 +1087,7 @@ static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
    return 0;

    qca_baudrate = qca_get_baudrate_value(speed);
    - bt_dev_info(hu->hdev, "Set UART speed to %d", speed);
    + bt_dev_dbg(hu->hdev, "Set UART speed to %d", speed);
    ret = qca_set_baudrate(hu->hdev, qca_baudrate);
    if (ret)
    return ret;
    @@ -985,15 +1098,52 @@ static int qca_set_speed(struct hci_uart *hu, enum qca_speed_type speed_type)
    return 0;
    }

    +static int qca_wcn3990_init(struct hci_uart *hu)
    +{
    + struct hci_dev *hdev = hu->hdev;
    + int ret;
    +
    + /* Forcefully enable wcn3990 to enter in to boot mode. */
    + host_set_baudrate(hu, 2400);
    + ret = qca_send_power_pulse(hdev, QCA_WCN3990_POWEROFF_PULSE);
    + if (ret)
    + return ret;
    +
    + qca_set_speed(hu, QCA_INIT_SPEED);
    + ret = qca_send_power_pulse(hdev, QCA_WCN3990_POWERON_PULSE);
    + if (ret)
    + return ret;
    +
    + /* Wait for 100 ms for SoC to boot */
    + msleep(100);
    +
    + /* Now the device is in ready state to communicate with host.
    + * To sync host with device we need to reopen port.
    + * Without this, we will have RTS and CTS synchronization
    + * issues.
    + */
    + serdev_device_close(hu->serdev);
    + ret = serdev_device_open(hu->serdev);
    + if (ret) {
    + bt_dev_err(hu->hdev, "failed to open port");
    + return ret;
    + }
    +
    + hci_uart_set_flow_control(hu, false);
    +
    + return ret;
    +}
    +
    static int qca_setup(struct hci_uart *hu)
    {
    struct hci_dev *hdev = hu->hdev;
    struct qca_data *qca = hu->priv;
    unsigned int speed, qca_baudrate = QCA_BAUDRATE_115200;
    + struct qca_serdev *qcadev;
    int ret;
    int soc_ver = 0;

    - bt_dev_info(hdev, "ROME setup");
    + qcadev = serdev_device_get_drvdata(hu->serdev);

    ret = qca_check_speeds(hu);
    if (ret)
    @@ -1002,8 +1152,19 @@ static int qca_setup(struct hci_uart *hu)
    /* Patch downloading has to be done without IBS mode */
    clear_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags);

    - /* Setup initial baudrate */
    - qca_set_speed(hu, QCA_INIT_SPEED);
    + if (qcadev->btsoc_type == QCA_WCN3990) {
    + bt_dev_info(hdev, "setting up wcn3990");
    + ret = qca_wcn3990_init(hu);
    + if (ret)
    + return ret;
    +
    + ret = qca_read_soc_version(hdev, &soc_ver);
    + if (ret)
    + return ret;
    + } else {
    + bt_dev_info(hdev, "ROME setup");
    + qca_set_speed(hu, QCA_INIT_SPEED);
    + }

    /* Setup user speed if needed */
    speed = qca_get_speed(hu, QCA_OPER_SPEED);
    @@ -1015,15 +1176,16 @@ static int qca_setup(struct hci_uart *hu)
    qca_baudrate = qca_get_baudrate_value(speed);
    }

    - /* Get QCA version information */
    - ret = qca_read_soc_version(hdev, &soc_ver);
    - if (ret)
    - return ret;
    + if (qcadev->btsoc_type != QCA_WCN3990) {
    + /* Get QCA version information */
    + ret = qca_read_soc_version(hdev, &soc_ver);
    + if (ret)
    + return ret;
    + }

    bt_dev_info(hdev, "QCA controller version 0x%08x", soc_ver);
    -
    /* Setup patch / NVM configurations */
    - ret = qca_uart_setup(hdev, qca_baudrate, QCA_ROME, soc_ver);
    + ret = qca_uart_setup(hdev, qca_baudrate, qcadev->btsoc_type, soc_ver);
    if (!ret) {
    set_bit(STATE_IN_BAND_SLEEP_ENABLED, &qca->flags);
    qca_debugfs_init(hdev);
    @@ -1059,9 +1221,123 @@ static struct hci_uart_proto qca_proto = {
    .dequeue = qca_dequeue,
    };

    +static const struct qca_vreg_data qca_soc_data = {
    + .soc_type = QCA_WCN3990,
    + .vregs = (struct qca_vreg []) {
    + { "vddio", 1800000, 1900000, 15000 },
    + { "vddxo", 1800000, 1900000, 80000 },
    + { "vddrf", 1300000, 1350000, 300000 },
    + { "vddch0", 3300000, 3400000, 450000 },
    + },
    + .num_vregs = 4,
    +};
    +
    +static void qca_power_shutdown(struct hci_dev *hdev)
    +{
    + struct hci_uart *hu = hci_get_drvdata(hdev);
    +
    + host_set_baudrate(hu, 2400);
    + qca_send_power_pulse(hdev, QCA_WCN3990_POWEROFF_PULSE);
    + qca_power_setup(hu, false);
    +}
    +
    +static int qca_enable_regulator(struct qca_vreg vregs,
    + struct regulator *regulator)
    +{
    + int ret;
    +
    + ret = regulator_set_voltage(regulator, vregs.min_uV,
    + vregs.max_uV);
    + if (ret)
    + return ret;
    +
    + if (vregs.load_uA)
    + ret = regulator_set_load(regulator,
    + vregs.load_uA);
    +
    + if (ret)
    + return ret;
    +
    + return regulator_enable(regulator);
    +
    +}
    +
    +static void qca_disable_regulator(struct qca_vreg vregs,
    + struct regulator *regulator)
    +{
    + regulator_disable(regulator);
    + regulator_set_voltage(regulator, 0, vregs.max_uV);
    + if (vregs.load_uA)
    + regulator_set_load(regulator, 0);
    +
    +}
    +
    +static int qca_power_setup(struct hci_uart *hu, bool on)
    +{
    + struct qca_vreg *vregs;
    + struct regulator_bulk_data *vreg_bulk;
    + struct qca_serdev *qcadev;
    + int i, num_vregs, ret = 0;
    +
    + qcadev = serdev_device_get_drvdata(hu->serdev);
    + if (!qcadev || !qcadev->bt_power || !qcadev->bt_power->vreg_data ||
    + !qcadev->bt_power->vreg_bulk)
    + return -EINVAL;
    +
    + vregs = qcadev->bt_power->vreg_data->vregs;
    + vreg_bulk = qcadev->bt_power->vreg_bulk;
    + num_vregs = qcadev->bt_power->vreg_data->num_vregs;
    + BT_DBG("on: %d", on);
    + if (on && !qcadev->bt_power->vregs_on) {
    + for (i = 0; i < num_vregs; i++) {
    + ret = qca_enable_regulator(vregs[i],
    + vreg_bulk[i].consumer);
    + if (ret)
    + break;
    + }
    +
    + if (ret) {
    + BT_ERR("failed to enable regulator:%s", vregs[i].name);
    + /* turn off regulators which are enabled */
    + for (i = i - 1; i >= 0; i--)
    + qca_disable_regulator(vregs[i],
    + vreg_bulk[i].consumer);
    + } else {
    + qcadev->bt_power->vregs_on = true;
    + }
    + } else if (!on && qcadev->bt_power->vregs_on) {
    + /* turn off regulator in reverse order */
    + i = qcadev->bt_power->vreg_data->num_vregs - 1;
    + for ( ; i >= 0; i--)
    + qca_disable_regulator(vregs[i], vreg_bulk[i].consumer);
    +
    + qcadev->bt_power->vregs_on = false;
    + }
    +
    + return ret;
    +}
    +
    +static int qca_init_regulators(struct qca_power *qca,
    + const struct qca_vreg *vregs, size_t num_vregs)
    +{
    + int i;
    +
    + qca->vreg_bulk = devm_kzalloc(qca->dev, num_vregs *
    + sizeof(struct regulator_bulk_data),
    + GFP_KERNEL);
    + if (!qca->vreg_bulk)
    + return -ENOMEM;
    +
    + for (i = 0; i < num_vregs; i++)
    + qca->vreg_bulk[i].supply = vregs[i].name;
    +
    + return devm_regulator_bulk_get(qca->dev, num_vregs, qca->vreg_bulk);
    +}
    +
    static int qca_serdev_probe(struct serdev_device *serdev)
    {
    struct qca_serdev *qcadev;
    + const struct qca_vreg_data *data;
    int err;

    qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL);
    @@ -1069,47 +1345,84 @@ static int qca_serdev_probe(struct serdev_device *serdev)
    return -ENOMEM;

    qcadev->serdev_hu.serdev = serdev;
    + data = of_device_get_match_data(&serdev->dev);
    serdev_device_set_drvdata(serdev, qcadev);
    + if (data && data->soc_type == QCA_WCN3990) {
    + qcadev->btsoc_type = QCA_WCN3990;
    + qcadev->bt_power = devm_kzalloc(&serdev->dev,
    + sizeof(struct qca_power),
    + GFP_KERNEL);
    + if (!qcadev->bt_power)
    + return -ENOMEM;
    +
    + qcadev->bt_power->dev = &serdev->dev;
    + qcadev->bt_power->vreg_data = data;
    + err = qca_init_regulators(qcadev->bt_power, data->vregs,
    + data->num_vregs);
    + if (err) {
    + BT_ERR("Failed to init regulators:%d", err);
    + goto out;
    + }

    - qcadev->bt_en = devm_gpiod_get(&serdev->dev, "enable",
    - GPIOD_OUT_LOW);
    - if (IS_ERR(qcadev->bt_en)) {
    - dev_err(&serdev->dev, "failed to acquire enable gpio\n");
    - return PTR_ERR(qcadev->bt_en);
    - }
    + qcadev->bt_power->vregs_on = false;

    - qcadev->susclk = devm_clk_get(&serdev->dev, NULL);
    - if (IS_ERR(qcadev->susclk)) {
    - dev_err(&serdev->dev, "failed to acquire clk\n");
    - return PTR_ERR(qcadev->susclk);
    - }
    + device_property_read_u32(&serdev->dev, "max-speed",
    + &qcadev->oper_speed);
    + if (!qcadev->oper_speed)
    + BT_DBG("UART will pick default operating speed");

    - err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ);
    - if (err)
    - return err;
    + err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
    + if (err) {
    + BT_ERR("wcn3990 serdev registration failed");
    + goto out;
    + }
    + } else {
    + qcadev->btsoc_type = QCA_ROME;
    + qcadev->bt_en = devm_gpiod_get(&serdev->dev, "enable",
    + GPIOD_OUT_LOW);
    + if (IS_ERR(qcadev->bt_en)) {
    + dev_err(&serdev->dev, "failed to acquire enable gpio\n");
    + return PTR_ERR(qcadev->bt_en);
    + }

    - err = clk_prepare_enable(qcadev->susclk);
    - if (err)
    - return err;
    + qcadev->susclk = devm_clk_get(&serdev->dev, NULL);
    + if (IS_ERR(qcadev->susclk)) {
    + dev_err(&serdev->dev, "failed to acquire clk\n");
    + return PTR_ERR(qcadev->susclk);
    + }

    - err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
    - if (err)
    - clk_disable_unprepare(qcadev->susclk);
    + err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ);
    + if (err)
    + return err;
    +
    + err = clk_prepare_enable(qcadev->susclk);
    + if (err)
    + return err;
    +
    + err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
    + if (err)
    + clk_disable_unprepare(qcadev->susclk);
    + }
    +
    +out: return err;

    - return err;
    }

    static void qca_serdev_remove(struct serdev_device *serdev)
    {
    struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);

    - hci_uart_unregister_device(&qcadev->serdev_hu);
    + if (qcadev->btsoc_type == QCA_WCN3990)
    + qca_power_shutdown(qcadev->serdev_hu.hdev);
    + else
    + clk_disable_unprepare(qcadev->susclk);

    - clk_disable_unprepare(qcadev->susclk);
    + hci_uart_unregister_device(&qcadev->serdev_hu);
    }

    static const struct of_device_id qca_bluetooth_of_match[] = {
    { .compatible = "qcom,qca6174-bt" },
    + { .compatible = "qcom,wcn3990-bt", .data = &qca_soc_data},
    { /* sentinel */ }
    };
    MODULE_DEVICE_TABLE(of, qca_bluetooth_of_match);
    --
    The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
    a Linux Foundation Collaborative Project
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      Last update: 2018-08-03 13:05    [W:5.100 / U:0.056 seconds]
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