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Bluetooth: hci_mrvl: Wait for final ack before switching baudrate

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For the Marvell HCI UART we have to upload two firmware files. The first
one is only for switching the baudrate of the device to a higher
baudrate. After the baudrate switching firmware has been uploaded the
device waits for a final ack (0x5a) before actually switching the
baudrate. To send this final ack with the old baudrate give the hci
ldisc workqueue a chance to run before switching the baudrate. Without
this the final ack will never be received by the device and firmware
upload fails.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Sascha Hauer 2019-06-14 09:23:50 +02:00 committed by Marcel Holtmann
parent 40fbb915fd
commit a55b896455
1 changed files with 3 additions and 0 deletions
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3
drivers/bluetooth/hci_mrvl.c
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@ -339,6 +339,9 @@ static int mrvl_setup(struct hci_uart *hu)
return -EINVAL;
}
/* Let the final ack go out before switching the baudrate */
hci_uart_wait_until_sent(hu);
hci_uart_set_baudrate(hu, 3000000);
hci_uart_set_flow_control(hu, false);