Commit 3347a809 authored by Stefan Wahren's avatar Stefan Wahren Committed by Marcel Holtmann

Bluetooth: hci_bcm: Fix RTS handling during startup

The RPi 4 uses the hardware handshake lines for CYW43455, but the chip
doesn't react to HCI requests during DT probe. The reason is the inproper
handling of the RTS line during startup. According to the startup
signaling sequence in the CYW43455 datasheet, the hosts RTS line must
be driven after BT_REG_ON and BT_HOST_WAKE.
Signed-off-by: default avatarStefan Wahren <wahrenst@gmx.net>
Signed-off-by: default avatarMarcel Holtmann <marcel@holtmann.org>
parent bba79fee
......@@ -445,9 +445,11 @@ static int bcm_open(struct hci_uart *hu)
out:
if (bcm->dev) {
hci_uart_set_flow_control(hu, true);
hu->init_speed = bcm->dev->init_speed;
hu->oper_speed = bcm->dev->oper_speed;
err = bcm_gpio_set_power(bcm->dev, true);
hci_uart_set_flow_control(hu, false);
if (err)
goto err_unset_hu;
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment