linux-kernel - [PATCH v5] Bluetooth: hci_qca: Enable power off/on support during hci down/up for QCA Rome

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Message-Id: <20200116032254.20549-1-rjliao@codeaurora.org>
Date:   Thu, 16 Jan 2020 11:22:54 +0800
From:   Rocky Liao <rjliao@...eaurora.org>
To:     marcel@...tmann.org, johan.hedberg@...il.com
Cc:     mka@...omium.org, linux-kernel@...r.kernel.org,
        linux-bluetooth@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        bgodavar@...eaurora.org, hemantg@...eaurora.org,
        Rocky Liao <rjliao@...eaurora.org>
Subject: [PATCH v5] Bluetooth: hci_qca: Enable power off/on support during hci down/up for QCA Rome

This patch registers hdev->shutdown() callback and also sets
HCI_QUIRK_NON_PERSISTENT_SETUP for QCA Rome. It will power-off the BT chip
during hci down and power-on/initialize the chip again during hci up. As
wcn399x already enabled this, this patch also removed the callback register
and QUIRK setting in qca_setup() for wcn399x and uniformly do this in the
probe() routine.

Signed-off-by: Rocky Liao <rjliao@...eaurora.org>
---

Changes in v2: None
Changes in v3:
  -moved the quirk and callback register to probe()
Changes in v4:
  -rebased the patch with latest code
  -moved the quirk and callback register to probe() for wcn399x
  -updated commit message
Changed in v5:
  -removed the "out" label and return err when fails

 drivers/bluetooth/hci_qca.c | 20 +++++++++++---------
 1 file changed, 11 insertions(+), 9 deletions(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 1139142e8eed..d6e0c99ee5eb 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1569,12 +1569,7 @@ static int qca_setup(struct hci_uart *hu)
 		return ret;
 
 	if (qca_is_wcn399x(soc_type)) {
-		/* Enable NON_PERSISTENT_SETUP QUIRK to ensure to execute
-		 * setup for every hci up.
-		 */
-		set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
 		set_bit(HCI_QUIRK_USE_BDADDR_PROPERTY, &hdev->quirks);
-		hu->hdev->shutdown = qca_power_off;
 
 		ret = qca_read_soc_version(hdev, &soc_ver, soc_type);
 		if (ret)
@@ -1813,6 +1808,7 @@ static int qca_init_regulators(struct qca_power *qca,
 static int qca_serdev_probe(struct serdev_device *serdev)
 {
 	struct qca_serdev *qcadev;
+	struct hci_dev *hdev;
 	const struct qca_vreg_data *data;
 	int err;
 
@@ -1838,7 +1834,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 					  data->num_vregs);
 		if (err) {
 			BT_ERR("Failed to init regulators:%d", err);
-			goto out;
+			return err;
 		}
 
 		qcadev->bt_power->vregs_on = false;
@@ -1851,7 +1847,7 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 		err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
 		if (err) {
 			BT_ERR("wcn3990 serdev registration failed");
-			goto out;
+			return err;
 		}
 	} else {
 		qcadev->btsoc_type = QCA_ROME;
@@ -1877,12 +1873,18 @@ static int qca_serdev_probe(struct serdev_device *serdev)
 			return err;
 
 		err = hci_uart_register_device(&qcadev->serdev_hu, &qca_proto);
-		if (err)
+		if (err) {
+			BT_ERR("Rome serdev registration failed");
 			clk_disable_unprepare(qcadev->susclk);
+			return err;
+		}
 	}
 
-out:	return err;
+	hdev = qcadev->serdev_hu.hdev;
+	set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
+	hdev->shutdown = qca_power_off;
 
+	return 0;
 }
 
 static void qca_serdev_remove(struct serdev_device *serdev)
-- 
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