Hi Marcel,
hi Johan,
Am 06.10.19 um 17:28 schrieb Stefan Wahren:
> 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: Stefan Wahren <wahrenst@xxxxxxx>
> ---
> drivers/bluetooth/hci_bcm.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/bluetooth/hci_bcm.c b/drivers/bluetooth/hci_bcm.c
> index 7646636..0f73f6a 100644
> --- a/drivers/bluetooth/hci_bcm.c
> +++ b/drivers/bluetooth/hci_bcm.c
> @@ -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;
> }
> --
> 2.7.4
would be nice to get some feedback about this.
Regards
Stefan
