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hci_qca: Add M.2 Bluetooth device support using pwrseq #1263

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hci_qca: Add M.2 Bluetooth device support using pwrseq #1263

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c098e4a
FROMLIST: Bluetooth: hci_qca: Add M.2 Bluetooth device support using …
Mani-Sadhasivam May 19, 2026
a99ce0e
FROMLIST: Bluetooth: hci_qca: Rename 'power_ctrl_enabled' to 'bt_en_a…
Mani-Sadhasivam May 19, 2026
94266f4
FROMLIST: Bluetooth: hci_qca: Set 'bt_en_available' based on W_DISABL…
Mani-Sadhasivam May 19, 2026
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28 changes: 24 additions & 4 deletions drivers/bluetooth/hci_qca.c
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Original file line number Diff line number Diff line change
Expand Up @@ -26,6 +26,7 @@
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/acpi.h>
#include <linux/platform_device.h>
#include <linux/pwrseq/consumer.h>
Expand Down Expand Up @@ -2389,7 +2390,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)
struct hci_dev *hdev;
const struct qca_device_data *data;
int err;
bool power_ctrl_enabled = true;
bool bt_en_available = true;

qcadev = devm_kzalloc(&serdev->dev, sizeof(*qcadev), GFP_KERNEL);
if (!qcadev)
Expand Down Expand Up @@ -2442,6 +2443,25 @@ static int qca_serdev_probe(struct serdev_device *serdev)
case QCA_WCN6750:
case QCA_WCN6855:
case QCA_WCN7850:
/*
* OF graph link is only present for BT devices attached through
* the M.2 Key E connector.
*/
if (of_graph_is_present(dev_of_node(&serdev->ctrl->dev))) {
struct device *dev;

qcadev->bt_power->pwrseq = devm_pwrseq_get(&serdev->ctrl->dev,
"uart");
if (IS_ERR(qcadev->bt_power->pwrseq))
return PTR_ERR(qcadev->bt_power->pwrseq);

dev = pwrseq_to_device(qcadev->bt_power->pwrseq);
if (!device_property_present(dev, "w-disable2-gpios"))
bt_en_available = false;

break;
}

if (!device_property_present(&serdev->dev, "enable-gpios")) {
/*
* Backward compatibility with old DT sources. If the
Expand Down Expand Up @@ -2485,7 +2505,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)
(data->soc_type == QCA_WCN6750 ||
data->soc_type == QCA_WCN6855 ||
data->soc_type == QCA_WCN7850))
power_ctrl_enabled = false;
bt_en_available = false;

qcadev->sw_ctrl = devm_gpiod_get_optional(&serdev->dev, "swctrl",
GPIOD_IN);
Expand Down Expand Up @@ -2523,7 +2543,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)
}

if (!qcadev->bt_en)
power_ctrl_enabled = false;
bt_en_available = false;

qcadev->susclk = devm_clk_get_optional_enabled_with_rate(
&serdev->dev, NULL, SUSCLK_RATE_32KHZ);
Expand All @@ -2541,7 +2561,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)

hdev = qcadev->serdev_hu.hdev;

if (power_ctrl_enabled) {
if (bt_en_available) {
hci_set_quirk(hdev, HCI_QUIRK_NON_PERSISTENT_SETUP);
hdev->shutdown = qca_hci_shutdown;
}
Expand Down