[PATCH 0/3] Bluetooth: hci_qca: Add delay after power-off pulse

[Matthias Kaehlcke]

Initialization of the QCA WCN3990 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)

A short delay after sending a power-off pulse (which is done immediately
before sending a power-on pulse) fixes this.

Also move the delays to qca_send_power_pulse(), since they are directly
related with sending the pulses. Change the interface of
qca_send_power_pulse() to receive a boolean instead of a power pulse
command, this improves readability of the function with the delays
added.

Matthias Kaehlcke (3):
  Bluetooth: hci_qca: Pass boolean 'on/off' to qca_send_power_pulse()
  Bluetooth: hci_qca: Move boot delay to qca_send_power_pulse()
  Bluetooth: hci_qca: Add delay after power-off pulse

 drivers/bluetooth/hci_qca.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

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2.21.0.rc0.258.g878e2cd30e-goog