During initialization the power-on pulse is currently sent inmediately
after the prior power-off pulse. With this initialization often fails
at boot time:
[ 15.205224] Bluetooth: hci0: setting up wcn3990
[ 17.341062] Bluetooth: hci0: command 0xfc00 tx timeout
[ 22.101453] ERROR: Bluetooth initialization failed
[ 25.337740] Bluetooth: hci0: Reading QCA version information failed (-110)
After a power-off pulse wait 10ms to give the controller time to power
off.
Signed-off-by: Matthias Kaehlcke <m...@chromium.org>
---
drivers/bluetooth/hci_qca.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/bluetooth/hci_qca.c b/drivers/bluetooth/hci_qca.c
index eacc108c422d0..c89c1ed87ffe9 100644
--- a/drivers/bluetooth/hci_qca.c
+++ b/drivers/bluetooth/hci_qca.c
@@ -1036,8 +1036,11 @@ static int qca_send_power_pulse(struct hci_uart *hu,
bool on)
usleep_range(100, 200);
hci_uart_set_flow_control(hu, false);
+ /* Give to controller time to boot/shutdown */
if (on)
msleep(100);
+ else
+ msleep(10);
return 0;
}
--
2.21.0.rc0.258.g878e2cd30e-goog
