On Sat, 1 Oct 2022, Kumaravel Thiagarajan wrote:
> pci1xxxx uart supports rs485 mode of operation in the hardware with
> auto-direction control with configurable delay for releasing RTS after
> the transmission. This patch adds support for the rs485 mode.
>
> Signed-off-by: Kumaravel Thiagarajan <kumaravel.thiagarajan@xxxxxxxxxxxxx>
> ---
> Changes in v2:
> - move pci1xxxx_rs485_config to a separate patch with
> pci1xxxx_rs485_supported.
> ---
> drivers/tty/serial/8250/8250_pci1xxxx.c | 57 +++++++++++++++++++++++++
> 1 file changed, 57 insertions(+)
>
> diff --git a/drivers/tty/serial/8250/8250_pci1xxxx.c b/drivers/tty/serial/8250/8250_pci1xxxx.c
> index 41a4b94f52b4..999e5a284266 100644
> --- a/drivers/tty/serial/8250/8250_pci1xxxx.c
> +++ b/drivers/tty/serial/8250/8250_pci1xxxx.c
> +
> + if (rs485->delay_rts_after_send) {
> + baud_period_in_ns = ((clock_div >> 8) * 16);
Is this 16 perhaps UART_BIT_SAMPLE_CNT?
--
i.
