On 04/10/2015 09:37 AM, Frederic Danis wrote:
> This allows user space application to set final speed requested for UART
> device. UART port is open at init speed by user space application.
>
> Signed-off-by: Frederic Danis <frederic.danis@xxxxxxxxxxxxxxx>
> ---
> drivers/bluetooth/hci_ldisc.c | 6 ++++++
> drivers/bluetooth/hci_uart.h | 2 ++
> 2 files changed, 8 insertions(+)
>
> diff --git a/drivers/bluetooth/hci_ldisc.c b/drivers/bluetooth/hci_ldisc.c
> index 5c9a73f..190a7f8 100644
> --- a/drivers/bluetooth/hci_ldisc.c
> +++ b/drivers/bluetooth/hci_ldisc.c
> @@ -609,6 +609,12 @@ static int hci_uart_tty_ioctl(struct tty_struct *tty, struct file *file,
> case HCIUARTGETFLAGS:
> return hu->hdev_flags;
>
> + case HCIUARTSETBAUDRATE:
> + if (test_bit(HCI_UART_PROTO_SET, &hu->flags))
> + return -EBUSY;
> + hu->speed = arg;
> + break;
> +
So now that the kernel can set line rate, why is an ioctl necessary
to determine what the line rate should be?
> default:
> err = n_tty_ioctl_helper(tty, file, cmd, arg);
> break;
> diff --git a/drivers/bluetooth/hci_uart.h b/drivers/bluetooth/hci_uart.h
> index 72120a5..09a47b4 100644
> --- a/drivers/bluetooth/hci_uart.h
> +++ b/drivers/bluetooth/hci_uart.h
> @@ -33,6 +33,7 @@
> #define HCIUARTGETDEVICE _IOR('U', 202, int)
> #define HCIUARTSETFLAGS _IOW('U', 203, int)
> #define HCIUARTGETFLAGS _IOR('U', 204, int)
> +#define HCIUARTSETBAUDRATE _IOW('U', 205, int)
>
> /* UART protocols */
> #define HCI_UART_MAX_PROTO 8
> @@ -72,6 +73,7 @@ struct hci_uart {
> struct hci_dev *hdev;
> unsigned long flags;
> unsigned long hdev_flags;
> + unsigned long speed;
>
> struct work_struct init_ready;
> struct work_struct write_work;
>
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