From 8a208b24d770c3db0099090a1ad62c848c363123 Mon Sep 17 00:00:00 2001 From: Rocky Liao Date: Wed, 4 Mar 2020 09:54:29 +0800 Subject: 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 Signed-off-by: Marcel Holtmann --- drivers/bluetooth/hci_qca.c | 47 +++++++++++++++++++++++++-------------------- 1 file changed, 26 insertions(+), 21 deletions(-) (limited to 'drivers/bluetooth') diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c index bf436d6e638e..325baa046c3a 100644 --- a/drivers/bluetooth/hci_qca.c +++ b/drivers/bluetooth/hci_qca.c @@ -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); - } - - err = clk_set_rate(qcadev->susclk, SUSCLK_RATE_32KHZ); - if (err) - return err; + 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_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); -- cgit v1.2.3