linux-kernel - [PATCH v2] Bluetooth: hci_qca: Give enough time to ROME controller to bootup.

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Message-Id: <20190401094908.11460-1-bgodavar@codeaurora.org>
Date:   Mon,  1 Apr 2019 15:19:08 +0530
From:   Balakrishna Godavarthi <bgodavar@...eaurora.org>
To:     marcel@...tmann.org, johan.hedberg@...il.com
Cc:     mka@...omium.org, linux-kernel@...r.kernel.org,
        linux-bluetooth@...r.kernel.org, hemantg@...eaurora.org,
        linux-arm-msm@...r.kernel.org,
        Balakrishna Godavarthi <bgodavar@...eaurora.org>,
        Rocky Liao <rjliao@...eaurora.org>,
        Claire Chang <tientzu@...omium.org>
Subject: [PATCH v2] Bluetooth: hci_qca: Give enough time to ROME controller to bootup.

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>
---
Changes in v2:
  * added fixes tag in the commit text.
---
 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 4ea995d610d2..a80c3bc90904 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -523,6 +523,8 @@ 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;
-- 
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