From b2e19dbff471eb6b9b39ff8f21c8d38e4fac8fe6 Mon Sep 17 00:00:00 2001 From: Stefan Wahren Date: Wed, 1 Jan 2020 15:01:34 +0100 Subject: [PATCH] Bluetooth: hci_bcm: Drive RTS only for BCM43438 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit commit e601daed271e9eb1b923972a0a1af65f8c7bb77b upstream. The commit 3347a80965b3 ("Bluetooth: hci_bcm: Fix RTS handling during startup") is causing at least a regression for AP6256 on Orange Pi 3. So do the RTS line handing during startup only on the necessary platform. Fixes: 3347a80965b3 ("Bluetooth: hci_bcm: Fix RTS handling during startup") Reported-by: Ondřej Jirman Signed-off-by: Stefan Wahren Signed-off-by: Marcel Holtmann --- drivers/bluetooth/hci_bcm.c | 21 +++++++++++++++++---- 1 file changed, 17 insertions(+), 4 deletions(-) --- a/drivers/bluetooth/hci_bcm.c +++ b/drivers/bluetooth/hci_bcm.c @@ -53,6 +53,7 @@ */ struct bcm_device_data { bool no_early_set_baudrate; + bool drive_rts_on_open; }; /** @@ -123,6 +124,7 @@ struct bcm_device { bool is_suspended; #endif bool no_early_set_baudrate; + bool drive_rts_on_open; u8 pcm_int_params[5]; }; @@ -459,7 +461,9 @@ static int bcm_open(struct hci_uart *hu) out: if (bcm->dev) { - hci_uart_set_flow_control(hu, true); + if (bcm->dev->drive_rts_on_open) + hci_uart_set_flow_control(hu, true); + hu->init_speed = bcm->dev->init_speed; /* If oper_speed is set, ldisc/serdev will set the baudrate @@ -469,7 +473,10 @@ out: hu->oper_speed = bcm->dev->oper_speed; err = bcm_gpio_set_power(bcm->dev, true); - hci_uart_set_flow_control(hu, false); + + if (bcm->dev->drive_rts_on_open) + hci_uart_set_flow_control(hu, false); + if (err) goto err_unset_hu; } @@ -1450,8 +1457,10 @@ static int bcm_serdev_probe(struct serde dev_err(&serdev->dev, "Failed to power down\n"); data = device_get_match_data(bcmdev->dev); - if (data) + if (data) { bcmdev->no_early_set_baudrate = data->no_early_set_baudrate; + bcmdev->drive_rts_on_open = data->drive_rts_on_open; + } return hci_uart_register_device(&bcmdev->serdev_hu, &bcm_proto); } @@ -1468,11 +1477,15 @@ static struct bcm_device_data bcm4354_de .no_early_set_baudrate = true, }; +static struct bcm_device_data bcm43438_device_data = { + .drive_rts_on_open = true, +}; + static const struct of_device_id bcm_bluetooth_of_match[] = { { .compatible = "brcm,bcm20702a1" }, { .compatible = "brcm,bcm4345c5" }, { .compatible = "brcm,bcm4330-bt" }, - { .compatible = "brcm,bcm43438-bt" }, + { .compatible = "brcm,bcm43438-bt", .data = &bcm43438_device_data }, { .compatible = "brcm,bcm43540-bt", .data = &bcm4354_device_data }, { .compatible = "brcm,bcm4335a0" }, { },