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Bluetooth: hci_qca: Make bt_en and susclk not mandatory for QCA Rome 

On some platforms the bt_en pin and susclk are default on and there
is no exposed resource to control them. This patch makes the bt_en
and susclk not mandatory to have BT work. It also will not set the
HCI_QUIRK_NON_PERSISTENT_SETUP and shutdown() callback if bt_en is
not available.

Signed-off-by: Rocky Liao <rjliao@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Rocky Liao 2020-03-04 09:54:29 +08:00 committed by Marcel Holtmann
parent b63882549b
commit 8a208b24d7
1 changed files with 26 additions and 21 deletions
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47
drivers/bluetooth/hci_qca.c
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@ -1562,9 +1562,11 @@ static int qca_power_on(struct hci_dev *hdev)
ret = qca_wcn3990_init(hu);
} else {
qcadev = serdev_device_get_drvdata(hu->serdev);
gpiod_set_value_cansleep(qcadev->bt_en, 1);
/* Controller needs time to bootup. */
msleep(150);
if (!IS_ERR(qcadev->bt_en)) {
gpiod_set_value_cansleep(qcadev->bt_en, 1);
/* Controller needs time to bootup. */
msleep(150);
}
}
return ret;
@ -1750,7 +1752,7 @@ static void qca_power_shutdown(struct hci_uart *hu)
host_set_baudrate(hu, 2400);
qca_send_power_pulse(hu, false);
qca_regulator_disable(qcadev);
} else {
} else if (!IS_ERR(qcadev->bt_en)) {
gpiod_set_value_cansleep(qcadev->bt_en, 0);
}
}
@ -1852,6 +1854,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)
struct hci_dev *hdev;
const struct qca_vreg_data *data;
int err;
bool power_ctrl_enabled = true;
qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL);
if (!qcadev)
@ -1901,35 +1904,37 @@ static int qca_serdev_probe(struct serdev_device *serdev)
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);
dev_warn(&serdev->dev, "failed to acquire enable gpio\n");
power_ctrl_enabled = 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);
dev_warn(&serdev->dev, "failed to acquire clk\n");
} else {
err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ);
if (err)
return err;
err = clk_prepare_enable(qcadev->susclk);
if (err)
return err;
}
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) {
BT_ERR("Rome serdev registration failed");
clk_disable_unprepare(qcadev->susclk);
if (!IS_ERR(qcadev->susclk))
clk_disable_unprepare(qcadev->susclk);
return err;
}
}
hdev = qcadev->serdev_hu.hdev;
set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
hdev->shutdown = qca_power_off;
if (power_ctrl_enabled) {
hdev = qcadev->serdev_hu.hdev;
set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
hdev->shutdown = qca_power_off;
}
return 0;
}
@ -1940,7 +1945,7 @@ static void qca_serdev_remove(struct serdev_device *serdev)
if (qca_is_wcn399x(qcadev->btsoc_type))
qca_power_shutdown(&qcadev->serdev_hu);
else
else if (!IS_ERR(qcadev->susclk))
clk_disable_unprepare(qcadev->susclk);
hci_uart_unregister_device(&qcadev->serdev_hu);