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Bluetooth: hci_qca: Add delay after power-off pulse 

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. Remove the previous short settling delay, it isn't needed anymore.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Balakrishna Godavarthi <bgodavar@codeaurora.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Matthias Kaehlcke 2019-02-26 11:46:47 -08:00 committed by Marcel Holtmann
parent ad571d725c
commit 0ebcddd8e0
1 changed files with 3 additions and 3 deletions
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6
drivers/bluetooth/hci_qca.c
View File

@ -1031,13 +1031,13 @@ static int qca_send_power_pulse(struct hci_uart *hu, bool on)
}
serdev_device_wait_until_sent(hu->serdev, timeout);
/* Wait for 100 uS for SoC to settle down */
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;
}