[PATCH v7 0/8] arm64: dts: monaco-arduino-monza: Add support for LGA WiFi/BT module

[PATCH v7 0/8] arm64: dts: monaco-arduino-monza: Add support for LGA WiFi/BT module

[Loic Poulain]

This series describes support for the onboard WiFi/Bluetooth module
present on the Arduino VENTUNO Q (monaco) platform.

The board provides LGA pads for a wireless module. On the VENTUNO Q
these pads are populated with an NFA725B module featuring the
QCA2066 WiFi/BT combo chip. While implemented as an LGA footprint,
the design is functionally compatible with the M.2 Key E.

The NFA725B exposes WiFi over PCIe and Bluetooth over a UART.
Both interfaces are gated through the W_DISABLE1# and W_DISABLE2#
signals, as defined by the M.2 specification and handled here via
the pcie-m2 power sequencer.

This series models the hardware using the existing pwrseq framework
and connector bindings, allowing coordinated PCIe and UART bring-up.

Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
---
Changes in v7:
- Rebased on linux-next (pwrseq changes dropped)
- Link to v6: https://lore.kernel.org/r/20260904-monza-wireless-v6-0-d8c5042b3efd@oss.qualcomm.com

Changes in v6:
- Rebase onto v7.3-rc1: drop the now-upstream "power: sequencing: pcie-m2:
  Add QCA2066 (QCNFA765) BT serdev ID" patch and adapt to the
  pwrseq_power_on()/pwrseq_power_off() -> pwrseq_enable()/pwrseq_disable()
  rename that landed in this merge window.
- hci_qca: fully drop struct qca_power and move its fields directly into
  struct qca_serdev, removing the bt_power indirection (Dmitry).
- Pick up Reviewed-by/Acked-by tags from Mani, Bartosz and Dmitry on the
  pwrseq_is_controllable() API, the pcie-m2/qcom-wcn controllability
  reporting, the bt_en_available rework and the M.2 connector support
  patches.
- Drop the pwrseq-m2-bt prerequisite series link, it is now merged upstream
  and included in the v7.3-rc1 base.
- Link to v5: https://lore.kernel.org/r/20260720-monza-wireless-v5-0-69ec6743543c@oss.qualcomm.com

Changes in v5:
- hci_qca: comment why the M.2 'uart' pwrseq lifetime is bound to the serdev
  consumer device instead of using devm_pwrseq_get() on the controller (Bartosz).
- hci_qca: note that dropping the always-on pwrseq handle is not a leak since
  the descriptor is still released by devres (Bartosz).
- Link to v4: https://lore.kernel.org/r/20260716-monza-wireless-v4-0-9b02e6f549d7@oss.qualcomm.com

Changes in v4:
- pwrseq: rename pwrseq_power_is_controllable() to pwrseq_is_controllable() (Bartosz).
- pwrseq: move the is_controllable() callback from the unit to the target (Bartosz).
- pwrseq: add might_sleep() and guard pwrseq_is_controllable() against
  concurrent provider removal with rw_lock, matching pwrseq_power_on/off() (Bartosz).
- pwrseq: clarify the pwrseq_is_controllable() doc (Bartosz)
- hci_qca: lifetime follows the Bluetooth device rather than the UART controller (ChenYu).
- dt-bindings: also add the "qcom,pcie-m2-1620-lga-connector" compatible (Mani).
- arm64: dts: monaco-arduino-monza: rename the 'pcie_bridge_ep' endpoint to 'pcie_ep' (Mani).
- pwrseq: reword commmit message (Mani)
- Link to v3: https://lore.kernel.org/r/20260710-monza-wireless-v3-0-46253587af64@oss.qualcomm.com

Changes in v3:
- Embed bt_power in struct qca_serdev instead of allocating it (Dmitry).
- Add generic pwrseq_is_controllable() API + per-target .is_controllable()
  callback; use it in hci_qca instead of peeking at the W_DISABLE2# property.
- Implement .is_controllable() in the pcie-m2 and qcom-wcn providers.
- Treat non-controllable BT power as always-on.
- Integrate the pending Bluetooth pwrseq patches from Mani.
- Link to v2: https://lore.kernel.org/r/20260702-monza-wireless-v2-0-7b56e2a6a6d4@oss.qualcomm.com

Changes in v2:
- hci_qca: extract M.2 pwrseq into qca_serdev_get_m2_pwrseq() helper, called
  outside the SoC switch; drop duplicated of_graph logic and redundant
  bt_power NULL checks (Dmitry/Mani)
- dts/bindings: use qcom,pcie-m2-1418-lga-connector (fallback
  pcie-m2-e-connector) instead of the generic M.2 E-key compatible (Mani)
- Link to v1: https://lore.kernel.org/r/20260520-monza-wireless-v1-0-9f6942310653@oss.qualcomm.com

---
Loic Poulain (6):
      Bluetooth: hci_qca: Set 'bt_en_available' based on pwrseq power controllability
      Bluetooth: hci_qca: Embed bt_power in struct qca_serdev
      Bluetooth: hci_qca: Support QCA2066 on M.2 connector via pwrseq
      Bluetooth: hci_qca: Flatten struct qca_power into struct qca_serdev
      dt-bindings: connector: pcie-m2-e: Add vendor LGA connector compatible
      arm64: dts: qcom: monaco-arduino-monza: Add QCA2066 M.2 WiFi/BT support

Manivannan Sadhasivam (2):
      Bluetooth: hci_qca: Add M.2 Bluetooth device support using pwrseq
      Bluetooth: hci_qca: Rename 'power_ctrl_enabled' to 'bt_en_available'

 .../bindings/connector/pcie-m2-e-connector.yaml    |   8 +-
 arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts  |  64 ++++++++-
 drivers/bluetooth/hci_qca.c                        | 160 ++++++++++++---------
 3 files changed, 157 insertions(+), 75 deletions(-)
---
base-commit: f0406245cb9855e6318335a8a223551354291a46
change-id: 20260520-monza-wireless-e6ce7f013f38

Best regards,
-- 
Loic Poulain <loic.poulain@oss.qualcomm.com>

[PATCH v7 1/8] Bluetooth: hci_qca: Add M.2 Bluetooth device support using pwrseq

[Loic Poulain]

From: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>

Power supply to the M.2 Bluetooth device attached to the host using M.2
connector is controlled using the 'uart' pwrseq device. So add support for
getting the pwrseq device if the OF graph link is present. Once obtained,
the existing pwrseq APIs can be used to control the power supplies of the
M.2 card.

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Tested-by: Wei Deng <wei.deng@oss.qualcomm.com>
---
 drivers/bluetooth/hci_qca.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 7089e9b639b2aad2d5ad2d43b07f495833757805..e249fc6e44479142e25af4e37bc4e1bdba13cd98 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -25,6 +25,7 @@
 #include <linux/gpio/consumer.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>
@@ -2454,6 +2455,18 @@ 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))) {
+			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);
+			break;
+		}
+
 		if (!device_property_present(&serdev->dev, "enable-gpios")) {
 			/*
 			 * Backward compatibility with old DT sources. If the

-- 
2.34.1

[PATCH v7 2/8] Bluetooth: hci_qca: Rename 'power_ctrl_enabled' to 'bt_en_available'

[Loic Poulain]

From: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>

'power_ctrl_enabled' flag is used to indicate the availability of the BT_EN
GPIO in devicetree. But the naming causes confusion with the new pwrctrl
framework.

So rename it to 'bt_en_available' to make it clear and explicit.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Tested-by: Wei Deng <wei.deng@oss.qualcomm.com>
---
 drivers/bluetooth/hci_qca.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index e249fc6e44479142e25af4e37bc4e1bdba13cd98..f53f95601693dcd8356b4b825776317061050f1b 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -2402,7 +2402,7 @@ 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)
@@ -2510,7 +2510,7 @@ 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);
@@ -2548,7 +2548,7 @@ 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);
@@ -2566,7 +2566,7 @@ 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;
 	}

-- 
2.34.1

[PATCH v7 3/8] Bluetooth: hci_qca: Set 'bt_en_available' based on pwrseq power controllability

[Loic Poulain]

A Bluetooth device only needs the non-persistent setup if the host can
gate its power, so that it is actually reset on the next power-on. When the
power is controlled by a power sequencer, whether the host can gate it
depends on the hardware wiring, e.g. the presence of the BT_EN or
W_DISABLE2# line.

Query the generic pwrseq_is_controllable() helper whenever the BT power
comes from a sequencer, regardless of which provider it is (M2, WCN, ...).
If the power is not controllable, clear 'bt_en_available' so that
HCI_QUIRK_NON_PERSISTENT_SETUP is not set.

This is based on Manivannan's original patch that keyed the decision off
the W_DISABLE2# device tree property, it now uses the generic pwrseq helper
and handles the always-on case.

Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@oss.qualcomm.com>
Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
---
 drivers/bluetooth/hci_qca.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index f53f95601693dcd8356b4b825776317061050f1b..20d8c5e890a8903a07c3e7e37d037c44d383e8df 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -2557,7 +2557,20 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 			return PTR_ERR(qcadev->susclk);
 		}
 	}
-	
+
+	if (qcadev->bt_power->pwrseq) {
+		bt_en_available = pwrseq_is_controllable(qcadev->bt_power->pwrseq);
+		if (!bt_en_available) {
+			/* The host cannot gate the BT power individually.
+			 * Treat it as always-on and drop the pwrseq handle.
+			 * The descriptor itself is still released by devres,
+			 * so dropping the handle here is not a leak.
+			 */
+			pwrseq_power_on(qcadev->bt_power->pwrseq);
+			qcadev->bt_power->pwrseq = NULL;
+		}
+	}
+
 	err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
 	if (err) {
 		BT_ERR("serdev registration failed");

-- 
2.34.1

[PATCH v7 4/8] Bluetooth: hci_qca: Embed bt_power in struct qca_serdev

[Loic Poulain]

'bt_power' is allocated dynamically only for a subset of SOC types, using a
switch on the SOC type that mirrors the one that follows it. This is about
to become pointless as the power sequencer path (used by M.2 modules) is
independent of the SOC type and needs 'bt_power' populated for any type.

Embed 'struct qca_power' directly in 'struct qca_serdev' instead of
allocating it separately. This drops the extra allocation and its dedicated
SOC-type switch, and removes the need for NULL checks on the pointer.

No functional change intended.

Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
---
 drivers/bluetooth/hci_qca.c | 72 ++++++++++++++++-----------------------------
 1 file changed, 26 insertions(+), 46 deletions(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 20d8c5e890a8903a07c3e7e37d037c44d383e8df..1d27ff98034ba99d0783e48db5c605f3b31117ea 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -225,7 +225,7 @@ struct qca_serdev {
 	struct gpio_desc *sw_ctrl;
 	struct clk	 *susclk;
 	enum qca_btsoc_type btsoc_type;
-	struct qca_power *bt_power;
+	struct qca_power bt_power;
 	u32 init_speed;
 	u32 oper_speed;
 	bool bdaddr_property_broken;
@@ -1779,7 +1779,7 @@ static int qca_regulator_init(struct hci_uart *hu)
 	 */
 	qcadev = serdev_device_get_drvdata(hu->serdev);
 
-	if (!qcadev->bt_power->vregs_on) {
+	if (!qcadev->bt_power.vregs_on) {
 		serdev_device_close(hu->serdev);
 		ret = qca_regulator_enable(qcadev);
 		if (ret)
@@ -2245,7 +2245,7 @@ static void qca_power_off(struct hci_uart *hu)
 		return;
 
 	qcadev = serdev_device_get_drvdata(hu->serdev);
-	power = qcadev->bt_power;
+	power = &qcadev->bt_power;
 
 	switch (soc_type) {
 	case QCA_WCN3988:
@@ -2265,7 +2265,7 @@ static void qca_power_off(struct hci_uart *hu)
 		break;
 	}
 
-	if (power && power->pwrseq) {
+	if (power->pwrseq) {
 		pwrseq_disable(power->pwrseq);
 		set_bit(QCA_BT_OFF, &qca->flags);
 		return;
@@ -2322,7 +2322,7 @@ static int qca_hci_shutdown(struct hci_dev *hdev)
 
 static int qca_regulator_enable(struct qca_serdev *qcadev)
 {
-	struct qca_power *power = qcadev->bt_power;
+	struct qca_power *power = &qcadev->bt_power;
 	int ret;
 
 	if (power->pwrseq)
@@ -2354,7 +2354,7 @@ static void qca_regulator_disable(struct qca_serdev *qcadev)
 	if (!qcadev)
 		return;
 
-	power = qcadev->bt_power;
+	power = &qcadev->bt_power;
 
 	/* Already disabled? */
 	if (!power->vregs_on)
@@ -2426,26 +2426,6 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 	else
 		qcadev->btsoc_type = QCA_ROME;
 
-	switch (qcadev->btsoc_type) {
-	case QCA_QCA6390:
-	case QCA_WCN3950:
-	case QCA_WCN3988:
-	case QCA_WCN3990:
-	case QCA_WCN3991:
-	case QCA_WCN3998:
-	case QCA_WCN6750:
-	case QCA_WCN6855:
-	case QCA_WCN7850:
-		qcadev->bt_power = devm_kzalloc(&serdev->dev,
-						sizeof(struct qca_power),
-						GFP_KERNEL);
-		if (!qcadev->bt_power)
-			return -ENOMEM;
-		break;
-	default:
-		break;
-	}
-
 	switch (qcadev->btsoc_type) {
 	case QCA_WCN3950:
 	case QCA_WCN3988:
@@ -2460,10 +2440,10 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 		 * the M.2 Key E connector.
 		 */
 		if (of_graph_is_present(dev_of_node(&serdev->ctrl->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);
+			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);
 			break;
 		}
 
@@ -2474,8 +2454,8 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 			 * let's use the power sequencer. Otherwise, let's
 			 * drive everything ourselves.
 			 */
-			qcadev->bt_power->pwrseq = devm_pwrseq_get(&serdev->dev,
-								   "bluetooth");
+			qcadev->bt_power.pwrseq = devm_pwrseq_get(&serdev->dev,
+								  "bluetooth");
 
 			/*
 			 * Some modules have BT_EN enabled via a hardware pull-up,
@@ -2483,21 +2463,21 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 			 * through the power sequence. In such cases, fall through
 			 * to follow the legacy flow.
 			 */
-			if (IS_ERR(qcadev->bt_power->pwrseq))
-				qcadev->bt_power->pwrseq = NULL;
+			if (IS_ERR(qcadev->bt_power.pwrseq))
+				qcadev->bt_power.pwrseq = NULL;
 			else
 				break;
 		}
 
-		qcadev->bt_power->dev = &serdev->dev;
-		err = qca_init_regulators(qcadev->bt_power, data->vregs,
+		qcadev->bt_power.dev = &serdev->dev;
+		err = qca_init_regulators(&qcadev->bt_power, data->vregs,
 					  data->num_vregs);
 		if (err) {
 			BT_ERR("Failed to init regulators:%d", err);
 			return err;
 		}
 
-		qcadev->bt_power->vregs_on = false;
+		qcadev->bt_power.vregs_on = false;
 
 		qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
 					       GPIOD_OUT_LOW);
@@ -2531,10 +2511,10 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 
 	case QCA_QCA6390:
 		if (dev_of_node(&serdev->dev)) {
-			qcadev->bt_power->pwrseq = devm_pwrseq_get(&serdev->dev,
-								   "bluetooth");
-			if (IS_ERR(qcadev->bt_power->pwrseq))
-				return PTR_ERR(qcadev->bt_power->pwrseq);
+			qcadev->bt_power.pwrseq = devm_pwrseq_get(&serdev->dev,
+								  "bluetooth");
+			if (IS_ERR(qcadev->bt_power.pwrseq))
+				return PTR_ERR(qcadev->bt_power.pwrseq);
 			break;
 		}
 		fallthrough;
@@ -2558,16 +2538,16 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 		}
 	}
 
-	if (qcadev->bt_power->pwrseq) {
-		bt_en_available = pwrseq_is_controllable(qcadev->bt_power->pwrseq);
+	if (qcadev->bt_power.pwrseq) {
+		bt_en_available = pwrseq_is_controllable(qcadev->bt_power.pwrseq);
 		if (!bt_en_available) {
 			/* The host cannot gate the BT power individually.
 			 * Treat it as always-on and drop the pwrseq handle.
 			 * The descriptor itself is still released by devres,
 			 * so dropping the handle here is not a leak.
 			 */
-			pwrseq_power_on(qcadev->bt_power->pwrseq);
-			qcadev->bt_power->pwrseq = NULL;
+			pwrseq_enable(qcadev->bt_power.pwrseq);
+			qcadev->bt_power.pwrseq = NULL;
 		}
 	}
 
@@ -2605,7 +2585,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 static void qca_serdev_remove(struct serdev_device *serdev)
 {
 	struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
-	struct qca_power *power = qcadev->bt_power;
+	struct qca_power *power = &qcadev->bt_power;
 
 	switch (qcadev->btsoc_type) {
 	case QCA_WCN3988:

-- 
2.34.1

[PATCH v7 5/8] Bluetooth: hci_qca: Support QCA2066 on M.2 connector via pwrseq

[Loic Poulain]

For QCA2066 (and other QCA chips) on M.2 connectors, the UART enable is
controlled by the W_DISABLE2# signal managed by the pcie-m2 power sequencer
rather than a dedicated BT enable GPIO.

When the serdev controller has an OF graph (indicating it is connected to
an M.2 connector), acquire the 'uart' pwrseq target from the connector's
power sequencer and use it to control BT power instead of the bt-enable
GPIO. This is factored out into qca_serdev_get_m2_pwrseq().

Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
---
 drivers/bluetooth/hci_qca.c | 47 +++++++++++++++++++++++++++++++++++----------
 1 file changed, 37 insertions(+), 10 deletions(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 1d27ff98034ba99d0783e48db5c605f3b31117ea..b6ec1a57248e2cf4bd138898ffc5cad45b1b4a8b 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1875,6 +1875,9 @@ static int qca_power_on(struct hci_dev *hdev)
 			/* Controller needs time to bootup. */
 			msleep(150);
 		}
+
+		if (qcadev->bt_power.pwrseq)
+			pwrseq_power_on(qcadev->bt_power.pwrseq);
 	}
 
 	clear_bit(QCA_BT_OFF, &qca->flags);
@@ -2396,6 +2399,34 @@ static int qca_init_regulators(struct qca_power *qca,
 	return 0;
 }
 
+static void qca_serdev_put_pwrseq(void *data)
+{
+	pwrseq_put(data);
+}
+
+static int qca_serdev_get_m2_pwrseq(struct qca_serdev *qcadev)
+{
+	struct serdev_device *serdev = qcadev->serdev_hu.serdev;
+	struct pwrseq_desc *pwrseq;
+
+	if (!of_graph_is_present(dev_of_node(&serdev->ctrl->dev)))
+		return 0;
+
+	/* The pwrseq is looked up on the serdev controller (which holds the
+	 * OF graph to the M.2 connector), but its lifetime must follow this
+	 * serdev consumer device, not the controller. So acquire it with the
+	 * non-devres pwrseq_get() and release it via a devres action bound to
+	 * &serdev->dev instead of using devm_pwrseq_get(&serdev->ctrl->dev).
+	 */
+	pwrseq = pwrseq_get(&serdev->ctrl->dev, "uart");
+	if (IS_ERR(pwrseq))
+		return PTR_ERR(pwrseq);
+
+	qcadev->bt_power.pwrseq = pwrseq;
+
+	return devm_add_action_or_reset(&serdev->dev, qca_serdev_put_pwrseq, pwrseq);
+}
+
 static int qca_serdev_probe(struct serdev_device *serdev)
 {
 	struct qca_serdev *qcadev;
@@ -2426,6 +2457,10 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 	else
 		qcadev->btsoc_type = QCA_ROME;
 
+	err = qca_serdev_get_m2_pwrseq(qcadev);
+	if (err)
+		return err;
+
 	switch (qcadev->btsoc_type) {
 	case QCA_WCN3950:
 	case QCA_WCN3988:
@@ -2435,17 +2470,9 @@ 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))) {
-			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);
+		/* M.2 connector modules are powered by the pwrseq acquired above. */
+		if (qcadev->bt_power.pwrseq)
 			break;
-		}
 
 		if (!device_property_present(&serdev->dev, "enable-gpios")) {
 			/*

-- 
2.34.1

[PATCH v7 6/8] Bluetooth: hci_qca: Flatten struct qca_power into struct qca_serdev

[Loic Poulain]

struct qca_power currently only groups a handful of fields
(vreg_bulk, num_vregs, vregs_on, pwrseq) that are exclusively used
from struct qca_serdev, via its embedded bt_power member. The extra
indirection level does not provide any isolation or reuse benefit,
and just adds qcadev->bt_power.<field> noise throughout the driver.

Drop struct qca_power and move its fields directly into
struct qca_serdev, updating qca_init_regulators() to take a
struct qca_serdev pointer instead. No functional change intended.

Suggested-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
---
 drivers/bluetooth/hci_qca.c | 91 +++++++++++++++++++--------------------------
 1 file changed, 39 insertions(+), 52 deletions(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index b6ec1a57248e2cf4bd138898ffc5cad45b1b4a8b..55a3b6c1c2ce7cdfa9e2d55a7ab97298d69b0057 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -211,21 +211,16 @@ struct qca_device_data {
 /*
  * Platform data for the QCA Bluetooth power driver.
  */
-struct qca_power {
-	struct device *dev;
-	struct regulator_bulk_data *vreg_bulk;
-	int num_vregs;
-	bool vregs_on;
-	struct pwrseq_desc *pwrseq;
-};
-
 struct qca_serdev {
 	struct hci_uart	 serdev_hu;
 	struct gpio_desc *bt_en;
 	struct gpio_desc *sw_ctrl;
 	struct clk	 *susclk;
 	enum qca_btsoc_type btsoc_type;
-	struct qca_power bt_power;
+	struct regulator_bulk_data *vreg_bulk;
+	int num_vregs;
+	bool vregs_on;
+	struct pwrseq_desc *pwrseq;
 	u32 init_speed;
 	u32 oper_speed;
 	bool bdaddr_property_broken;
@@ -1779,7 +1774,7 @@ static int qca_regulator_init(struct hci_uart *hu)
 	 */
 	qcadev = serdev_device_get_drvdata(hu->serdev);
 
-	if (!qcadev->bt_power.vregs_on) {
+	if (!qcadev->vregs_on) {
 		serdev_device_close(hu->serdev);
 		ret = qca_regulator_enable(qcadev);
 		if (ret)
@@ -1876,8 +1871,8 @@ static int qca_power_on(struct hci_dev *hdev)
 			msleep(150);
 		}
 
-		if (qcadev->bt_power.pwrseq)
-			pwrseq_power_on(qcadev->bt_power.pwrseq);
+		if (qcadev->pwrseq)
+			pwrseq_enable(qcadev->pwrseq);
 	}
 
 	clear_bit(QCA_BT_OFF, &qca->flags);
@@ -2230,7 +2225,6 @@ static void qca_power_off(struct hci_uart *hu)
 	unsigned long flags;
 	enum qca_btsoc_type soc_type = qca_soc_type(hu);
 	bool sw_ctrl_state;
-	struct qca_power *power;
 
 	/* From this point we go into power off state. But serial port may
 	 * still be open, stop queueing the IBS data and flush all the buffered
@@ -2248,7 +2242,6 @@ static void qca_power_off(struct hci_uart *hu)
 		return;
 
 	qcadev = serdev_device_get_drvdata(hu->serdev);
-	power = &qcadev->bt_power;
 
 	switch (soc_type) {
 	case QCA_WCN3988:
@@ -2268,8 +2261,8 @@ static void qca_power_off(struct hci_uart *hu)
 		break;
 	}
 
-	if (power->pwrseq) {
-		pwrseq_disable(power->pwrseq);
+	if (qcadev->pwrseq) {
+		pwrseq_disable(qcadev->pwrseq);
 		set_bit(QCA_BT_OFF, &qca->flags);
 		return;
         }
@@ -2325,23 +2318,22 @@ static int qca_hci_shutdown(struct hci_dev *hdev)
 
 static int qca_regulator_enable(struct qca_serdev *qcadev)
 {
-	struct qca_power *power = &qcadev->bt_power;
 	int ret;
 
-	if (power->pwrseq)
-		return pwrseq_enable(power->pwrseq);
+	if (qcadev->pwrseq)
+		return pwrseq_enable(qcadev->pwrseq);
 
 	/* Already enabled */
-	if (power->vregs_on)
+	if (qcadev->vregs_on)
 		return 0;
 
-	BT_DBG("enabling %d regulators)", power->num_vregs);
+	BT_DBG("enabling %d regulators)", qcadev->num_vregs);
 
-	ret = regulator_bulk_enable(power->num_vregs, power->vreg_bulk);
+	ret = regulator_bulk_enable(qcadev->num_vregs, qcadev->vreg_bulk);
 	if (ret)
 		return ret;
 
-	power->vregs_on = true;
+	qcadev->vregs_on = true;
 
 	ret = clk_prepare_enable(qcadev->susclk);
 	if (ret)
@@ -2352,38 +2344,35 @@ static int qca_regulator_enable(struct qca_serdev *qcadev)
 
 static void qca_regulator_disable(struct qca_serdev *qcadev)
 {
-	struct qca_power *power;
-
 	if (!qcadev)
 		return;
 
-	power = &qcadev->bt_power;
-
 	/* Already disabled? */
-	if (!power->vregs_on)
+	if (!qcadev->vregs_on)
 		return;
 
-	regulator_bulk_disable(power->num_vregs, power->vreg_bulk);
-	power->vregs_on = false;
+	regulator_bulk_disable(qcadev->num_vregs, qcadev->vreg_bulk);
+	qcadev->vregs_on = false;
 
 	clk_disable_unprepare(qcadev->susclk);
 }
 
-static int qca_init_regulators(struct qca_power *qca,
+static int qca_init_regulators(struct qca_serdev *qcadev,
 				const struct qca_vreg *vregs, size_t num_vregs)
 {
+	struct device *dev = &qcadev->serdev_hu.serdev->dev;
 	struct regulator_bulk_data *bulk;
 	int ret;
 	int i;
 
-	bulk = devm_kcalloc(qca->dev, num_vregs, sizeof(*bulk), GFP_KERNEL);
+	bulk = devm_kcalloc(dev, num_vregs, sizeof(*bulk), GFP_KERNEL);
 	if (!bulk)
 		return -ENOMEM;
 
 	for (i = 0; i < num_vregs; i++)
 		bulk[i].supply = vregs[i].name;
 
-	ret = devm_regulator_bulk_get(qca->dev, num_vregs, bulk);
+	ret = devm_regulator_bulk_get(dev, num_vregs, bulk);
 	if (ret < 0)
 		return ret;
 
@@ -2393,8 +2382,8 @@ static int qca_init_regulators(struct qca_power *qca,
 			return ret;
 	}
 
-	qca->vreg_bulk = bulk;
-	qca->num_vregs = num_vregs;
+	qcadev->vreg_bulk = bulk;
+	qcadev->num_vregs = num_vregs;
 
 	return 0;
 }
@@ -2422,7 +2411,7 @@ static int qca_serdev_get_m2_pwrseq(struct qca_serdev *qcadev)
 	if (IS_ERR(pwrseq))
 		return PTR_ERR(pwrseq);
 
-	qcadev->bt_power.pwrseq = pwrseq;
+	qcadev->pwrseq = pwrseq;
 
 	return devm_add_action_or_reset(&serdev->dev, qca_serdev_put_pwrseq, pwrseq);
 }
@@ -2471,7 +2460,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 	case QCA_WCN6855:
 	case QCA_WCN7850:
 		/* M.2 connector modules are powered by the pwrseq acquired above. */
-		if (qcadev->bt_power.pwrseq)
+		if (qcadev->pwrseq)
 			break;
 
 		if (!device_property_present(&serdev->dev, "enable-gpios")) {
@@ -2481,7 +2470,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 			 * let's use the power sequencer. Otherwise, let's
 			 * drive everything ourselves.
 			 */
-			qcadev->bt_power.pwrseq = devm_pwrseq_get(&serdev->dev,
+			qcadev->pwrseq = devm_pwrseq_get(&serdev->dev,
 								  "bluetooth");
 
 			/*
@@ -2490,21 +2479,20 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 			 * through the power sequence. In such cases, fall through
 			 * to follow the legacy flow.
 			 */
-			if (IS_ERR(qcadev->bt_power.pwrseq))
-				qcadev->bt_power.pwrseq = NULL;
+			if (IS_ERR(qcadev->pwrseq))
+				qcadev->pwrseq = NULL;
 			else
 				break;
 		}
 
-		qcadev->bt_power.dev = &serdev->dev;
-		err = qca_init_regulators(&qcadev->bt_power, data->vregs,
+		err = qca_init_regulators(qcadev, data->vregs,
 					  data->num_vregs);
 		if (err) {
 			BT_ERR("Failed to init regulators:%d", err);
 			return err;
 		}
 
-		qcadev->bt_power.vregs_on = false;
+		qcadev->vregs_on = false;
 
 		qcadev->bt_en = devm_gpiod_get_optional(&serdev->dev, "enable",
 					       GPIOD_OUT_LOW);
@@ -2538,10 +2526,10 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 
 	case QCA_QCA6390:
 		if (dev_of_node(&serdev->dev)) {
-			qcadev->bt_power.pwrseq = devm_pwrseq_get(&serdev->dev,
+			qcadev->pwrseq = devm_pwrseq_get(&serdev->dev,
 								  "bluetooth");
-			if (IS_ERR(qcadev->bt_power.pwrseq))
-				return PTR_ERR(qcadev->bt_power.pwrseq);
+			if (IS_ERR(qcadev->pwrseq))
+				return PTR_ERR(qcadev->pwrseq);
 			break;
 		}
 		fallthrough;
@@ -2565,16 +2553,16 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 		}
 	}
 
-	if (qcadev->bt_power.pwrseq) {
-		bt_en_available = pwrseq_is_controllable(qcadev->bt_power.pwrseq);
+	if (qcadev->pwrseq) {
+		bt_en_available = pwrseq_is_controllable(qcadev->pwrseq);
 		if (!bt_en_available) {
 			/* The host cannot gate the BT power individually.
 			 * Treat it as always-on and drop the pwrseq handle.
 			 * The descriptor itself is still released by devres,
 			 * so dropping the handle here is not a leak.
 			 */
-			pwrseq_enable(qcadev->bt_power.pwrseq);
-			qcadev->bt_power.pwrseq = NULL;
+			pwrseq_enable(qcadev->pwrseq);
+			qcadev->pwrseq = NULL;
 		}
 	}
 
@@ -2612,7 +2600,6 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 static void qca_serdev_remove(struct serdev_device *serdev)
 {
 	struct qca_serdev *qcadev = serdev_device_get_drvdata(serdev);
-	struct qca_power *power = &qcadev->bt_power;
 
 	switch (qcadev->btsoc_type) {
 	case QCA_WCN3988:
@@ -2622,7 +2609,7 @@ static void qca_serdev_remove(struct serdev_device *serdev)
 	case QCA_WCN6750:
 	case QCA_WCN6855:
 	case QCA_WCN7850:
-		if (power->vregs_on)
+		if (qcadev->vregs_on)
 			qca_power_off(&qcadev->serdev_hu);
 		break;
 	default:

-- 
2.34.1

[PATCH v7 7/8] dt-bindings: connector: pcie-m2-e: Add vendor LGA connector compatible

[Loic Poulain]

Some modules (e.g. the Qualcomm QCA2066/QCNFA765) expose the same M.2
Key E interface signals but are physically soldered as an LGA package
rather than plugged into a real M.2 Key E connector socket. Such designs
are not actual M.2 Key E connectors, so describe them with a dedicated
vendor-specific compatible while keeping "pcie-m2-e-connector" as a
fallback for the shared signal semantics.

Add "qcom,pcie-m2-1418-lga-connector" for the M.2 LGA 1418 found on
Arduino Ventuno Q (Monaco Monza).

Add "qcom,pcie-m2-1620-lga-connector" for the M.2 LGA 1620 found on
The Lenovo Thinkpad T14s.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
---
 .../devicetree/bindings/connector/pcie-m2-e-connector.yaml        | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/connector/pcie-m2-e-connector.yaml b/Documentation/devicetree/bindings/connector/pcie-m2-e-connector.yaml
index f7859aa9b63469cb43919c0b5719c18694c5364d..ce6173a0ec41cfe8ab4a5780940999c18674ab7e 100644
--- a/Documentation/devicetree/bindings/connector/pcie-m2-e-connector.yaml
+++ b/Documentation/devicetree/bindings/connector/pcie-m2-e-connector.yaml
@@ -17,7 +17,13 @@ description:
 
 properties:
   compatible:
-    const: pcie-m2-e-connector
+    oneOf:
+      - const: pcie-m2-e-connector
+      - items:
+          - enum:
+              - qcom,pcie-m2-1418-lga-connector
+              - qcom,pcie-m2-1620-lga-connector
+          - const: pcie-m2-e-connector
 
   vpcie3v3-supply:
     description: A phandle to the regulator for 3.3v supply.

-- 
2.34.1

[PATCH v7 8/8] arm64: dts: qcom: monaco-arduino-monza: Add QCA2066 M.2 WiFi/BT support

[Loic Poulain]

Add support for the QCA2066 (QCNFA765) WiFi/Bluetooth module on the
Arduino VENTUNO Q board. The module is interfaced via LGA and is
compatible with the M.2 Key E.

Add wireless-lga-connector node using pcie-m2-e-connector binding,
connecting PCIe port 0 to the WiFi interface and UART10 port 3 to
the Bluetooth interface.

Add pcie@1,0 downstream port node with pciclass,0604 compatible so
the pci-pwrctrl driver can acquire the power sequencer and enable
the M.2 slot before PCIe enumeration.

Add nfa725b_default_state pinctrl for the W_DISABLE1/2 GPIOs
(gpio56/gpio55) used by the power sequencer.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
---
 arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts | 64 +++++++++++++++++++++--
 1 file changed, 60 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts b/arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts
index 940a03732eefc49280b4182101cf3fb9ee951053..f24a87bd7cbf63bda803161f3659b0538a5ee35a 100644
--- a/arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts
+++ b/arch/arm64/boot/dts/qcom/monaco-arduino-monza.dts
@@ -178,6 +178,40 @@ vreg_nvme: regulator-3p3-m2 {
 		enable-active-high;
 		startup-delay-us = <20000>;
 	};
+
+	wireless-lga-connector {
+		compatible = "qcom,pcie-m2-1418-lga-connector",
+			     "pcie-m2-e-connector";
+		vpcie3v3-supply = <&vdc_3v3>;
+		vpcie1v8-supply = <&vdc_1v8>;
+		w-disable1-gpios = <&tlmm 56 GPIO_ACTIVE_LOW>;
+		w-disable2-gpios = <&tlmm 55 GPIO_ACTIVE_LOW>;
+		pinctrl-0 = <&nfa725b_default_state>;
+		pinctrl-names = "default";
+
+		ports {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			/* WiFi/PCIe */
+			port@0 {
+				reg = <0>;
+
+				lga_pcie_ep: endpoint {
+					remote-endpoint = <&pcie_ep>;
+				};
+			};
+
+			/* Bluetooth/UART */
+			port@3 {
+				reg = <3>;
+
+				lga_uart_ep: endpoint {
+					remote-endpoint = <&uart10_ep>;
+				};
+			};
+		};
+	};
 };
 
 &cci1 {
@@ -541,6 +575,22 @@ pcie@0,0 {
 		ranges;
 		reg = <0x010000 0x00 0x00 0x00 0x00>;
 
+		pcie@1,0 {
+			#address-cells = <3>;
+			#size-cells = <2>;
+			device_type = "pci";
+			compatible = "pciclass,0604";
+			bus-range = <0x00 0xff>;
+			ranges;
+			reg = <0x020800 0x00 0x00 0x00 0x00>;
+
+			port {
+				pcie_ep: endpoint {
+					remote-endpoint = <&lga_pcie_ep>;
+				};
+			};
+		};
+
 		pcie@2,0 {
 			#address-cells = <3>;
 			#size-cells = <2>;
@@ -694,6 +744,12 @@ max98091_default: max98091-default-state {
 		bias-pull-up;
 	};
 
+	nfa725b_default_state: nfa725b-default-state {
+		pins = "gpio55", "gpio56";
+		function = "gpio";
+		bias-disable;
+	};
+
 	pcie1_default_state: pcie1-default-state {
 		wake-pins {
 			pins = "gpio21";
@@ -745,10 +801,10 @@ &uart7 {
 &uart10 {
 	status = "okay";
 
-	bluetooth: bluetooth {
-		compatible = "qcom,qca2066-bt";
-		enable-gpios = <&tlmm 55 GPIO_ACTIVE_HIGH>;
-		clocks = <&sleep_clk>;
+	port {
+		uart10_ep: endpoint {
+			remote-endpoint = <&lga_uart_ep>;
+		};
 	};
 };
 

-- 
2.34.1

Re: [PATCH v7 5/8] Bluetooth: hci_qca: Support QCA2066 on M.2 connector via pwrseq

[Val Packett]

On 10/5/26 9:21 AM, Loic Poulain wrote:
> For QCA2066 (and other QCA chips) on M.2 connectors, the UART enable is
> controlled by the W_DISABLE2# signal managed by the pcie-m2 power sequencer
> rather than a dedicated BT enable GPIO.
>
> When the serdev controller has an OF graph (indicating it is connected to
> an M.2 connector), acquire the 'uart' pwrseq target from the connector's
> power sequencer and use it to control BT power instead of the bt-enable
> GPIO. This is factored out into qca_serdev_get_m2_pwrseq().
>
> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org>
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
> Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
> ---
>   drivers/bluetooth/hci_qca.c | 47 +++++++++++++++++++++++++++++++++++----------
>   1 file changed, 37 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
> index 1d27ff98034ba99d0783e48db5c605f3b31117ea..b6ec1a57248e2cf4bd138898ffc5cad45b1b4a8b 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -1875,6 +1875,9 @@ static int qca_power_on(struct hci_dev *hdev)
>   			/* Controller needs time to bootup. */
>   			msleep(150);
>   		}
> +
> +		if (qcadev->bt_power.pwrseq)
> +			pwrseq_power_on(qcadev->bt_power.pwrseq);
>   	}
>   
>   	clear_bit(QCA_BT_OFF, &qca->flags);
> @@ -2396,6 +2399,34 @@ static int qca_init_regulators(struct qca_power *qca,
>   	return 0;
>   }
>   
> +static void qca_serdev_put_pwrseq(void *data)
> +{
> +	pwrseq_put(data);
> +}
> +
> +static int qca_serdev_get_m2_pwrseq(struct qca_serdev *qcadev)
> +{
> +	struct serdev_device *serdev = qcadev->serdev_hu.serdev;
> +	struct pwrseq_desc *pwrseq;
> +
> +	if (!of_graph_is_present(dev_of_node(&serdev->ctrl->dev)))
> +		return 0;
Seems like of_graph_is_present does *not* return false for the existing 
(non-connector) setup which is currently used in all the laptop device 
trees..
> +
> +	/* The pwrseq is looked up on the serdev controller (which holds the
> +	 * OF graph to the M.2 connector), but its lifetime must follow this
> +	 * serdev consumer device, not the controller. So acquire it with the
> +	 * non-devres pwrseq_get() and release it via a devres action bound to
> +	 * &serdev->dev instead of using devm_pwrseq_get(&serdev->ctrl->dev).
> +	 */
> +	pwrseq = pwrseq_get(&serdev->ctrl->dev, "uart");
> +	if (IS_ERR(pwrseq))
> +		return PTR_ERR(pwrseq);
> [..]

So this returns EPROBE_DEFER and bluetooth gets deferred forever :(

~val