linux-kernel - Re: [PATCH v1] Bluetooth: hci_qca: Give enough time to ROME controller to bootup.

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Date:   Fri, 08 Mar 2019 13:15:31 +0800
From:   rjliao@...eaurora.org
To:     Balakrishna Godavarthi <bgodavar@...eaurora.org>
Cc:     marcel@...tmann.org, johan.hedberg@...il.com, mka@...omium.org,
        linux-kernel@...r.kernel.org, linux-bluetooth@...r.kernel.org,
        hemantg@...eaurora.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCH v1] Bluetooth: hci_qca: Give enough time to ROME
 controller to bootup.

在 2019-03-07 00:21，Balakrishna Godavarthi 写道：
> This patch enables enough time to ROME controller to bootup
> after we bring the enable ping out of reset.
> 
> Signed-off-by: Balakrishna Godavarthi <bgodavar@...eaurora.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 237aea34b69f..1953b13511e7 100644
> --- a/drivers/bluetooth/hci_qca.c
> +++ b/drivers/bluetooth/hci_qca.c
> @@ -508,6 +508,8 @@ 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;
Reviewed-by: Rocky Liao <rjliao@...eaurora.org>
Tested-by: Rocky Liao <rjliao@...eaurora.org>