linux-kernel - [PATCH v3 3/4] Bluetooth: hci_qca: Enable power off/on support during hci down/up for QCA Rome

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Date:   Fri, 27 Dec 2019 15:21:29 +0800
From:   Rocky Liao <rjliao@...eaurora.org>
To:     marcel@...tmann.org, johan.hedberg@...il.com
Cc:     linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, Rocky Liao <rjliao@...eaurora.org>
Subject: [PATCH v3 3/4] 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.

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

Changes in v2: None
Changes in v3: 
- Move the quirk and callback register to probe()

 drivers/bluetooth/hci_qca.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index 45042aa27fa4..ca0b38f065e5 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1532,6 +1532,7 @@ 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;
 
@@ -1596,8 +1597,14 @@ 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) {
 			clk_disable_unprepare(qcadev->susclk);
+			goto out;
+		}
+
+		hdev = qcadev->serdev_hu.hdev;
+		set_bit(HCI_QUIRK_NON_PERSISTENT_SETUP, &hdev->quirks);
+		hdev->shutdown = qca_power_off;
 	}
 
 out:	return err;
-- 
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project