linux-kernel - [PATCH AUTOSEL 4.19 079/244] Bluetooth: hci_qca: Give enough time to ROME controller to bootup.

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Date:   Wed, 22 May 2019 15:23:45 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Balakrishna Godavarthi <bgodavar@...eaurora.org>,
        Rocky Liao <rjliao@...eaurora.org>,
        Claire Chang <tientzu@...omium.org>,
        Marcel Holtmann <marcel@...tmann.org>,
        Sasha Levin <sashal@...nel.org>,
        linux-bluetooth@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 079/244] Bluetooth: hci_qca: Give enough time to ROME controller to bootup.

From: Balakrishna Godavarthi <bgodavar@...eaurora.org>

[ Upstream commit 7f09d5a6c33be66a5ca19bf9dd1c2d90c5dfcf0d ]

This patch enables enough time to ROME controller to bootup
after we bring the enable pin out of reset.

Fixes: 05ba533c5c11 ("Bluetooth: hci_qca: Add serdev support").
Signed-off-by: Balakrishna Godavarthi <bgodavar@...eaurora.org>
Reviewed-by: Rocky Liao <rjliao@...eaurora.org>
Tested-by: Rocky Liao <rjliao@...eaurora.org>
Tested-by: Claire Chang <tientzu@...omium.org>
Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/bluetooth/hci_qca.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index f0d593c3fa728..77004c29da089 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -504,6 +504,8 @@ static int qca_open(struct hci_uart *hu)
 		qcadev = serdev_device_get_drvdata(hu->serdev);
 		if (qcadev->btsoc_type != QCA_WCN3990) {
 			gpiod_set_value_cansleep(qcadev->bt_en, 1);
+			/* Controller needs time to bootup. */
+			msleep(150);
 		} else {
 			hu->init_speed = qcadev->init_speed;
 			hu->oper_speed = qcadev->oper_speed;
-- 
2.20.1