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SubjectRe: [PATCH v14 7/7] Bluetooth: hci_qca: Add support for Qualcomm Bluetooth chip wcn3990
On 2018-08-03 16:31, Balakrishna Godavarthi wrote:
> 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;

[Bala] : nit: return 0, will respin patch series v15 :)

> +}
> +
> 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);

--
Regards
Balakrishna.

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