linux-kernel - [PATCH v2 1/4] Bluetooth: hci_qca: Add QCA Rome power off support to the qca_power

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Date:   Thu, 26 Dec 2019 14:45:51 +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 v2 1/4] Bluetooth: hci_qca: Add QCA Rome power off support to the qca_power_off()

We will need to call the qca_power_off() API to power off Rome, add the
support into it. QCA Rome is using bt_en GPIO for power off, so we just
need to pull down this bt_en GPIO to power off it.

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

Changes in v2: None

 drivers/bluetooth/hci_qca.c | 21 +++++++++++++++++----
 1 file changed, 17 insertions(+), 4 deletions(-)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index b602ed01505b..43fd84028786 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1413,13 +1413,26 @@ static void qca_power_shutdown(struct hci_uart *hu)
 static int qca_power_off(struct hci_dev *hdev)
 {
 	struct hci_uart *hu = hci_get_drvdata(hdev);
+	struct qca_serdev *qcadev;
+	enum qca_btsoc_type soc_type = qca_soc_type(hu);
+
+	if (qca_is_wcn399x(soc_type)) {
+		/* Perform pre shutdown command */
+		qca_send_pre_shutdown_cmd(hdev);
+
+		usleep_range(8000, 10000);
 
-	/* Perform pre shutdown command */
-	qca_send_pre_shutdown_cmd(hdev);
+		qca_power_shutdown(hu);
+	} else {
+		if (hu->serdev) {
+			qcadev = serdev_device_get_drvdata(hu->serdev);
+
+			gpiod_set_value_cansleep(qcadev->bt_en, 0);
 
-	usleep_range(8000, 10000);
+			usleep_range(8000, 10000);
+		}
+	}
 
-	qca_power_shutdown(hu);
 	return 0;
 }
 
-- 
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