On Mon, Oct 31, 2016 at 05:26:47PM +0000, Ed Blake wrote:
> Add a set_ldisc function to enable/disable IrDA SIR mode according to
> the new line discipline, if IrDA SIR mode is supported by the hardware
> configuration.
>
> Signed-off-by: Ed Blake <ed.blake@xxxxxxxxxx>
> ---
> drivers/tty/serial/8250/8250_dw.c | 22 ++++++++++++++++++++++
> 1 file changed, 22 insertions(+)
>
> diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
> index 459d726..c89fafc 100644
> --- a/drivers/tty/serial/8250/8250_dw.c
> +++ b/drivers/tty/serial/8250/8250_dw.c
> @@ -53,6 +53,8 @@
> /* Helper for fifo size calculation */
> #define DW_UART_CPR_FIFO_SIZE(a) (((a >> 16) & 0xff) * 16)
>
> +/* DesignWare specific register fields */
> +#define DW_UART_MCR_SIRE BIT(6)
>
> struct dw8250_data {
> u8 usr_reg;
> @@ -254,6 +256,22 @@ static void dw8250_set_termios(struct uart_port *p, struct ktermios *termios,
> serial8250_do_set_termios(p, termios, old);
> }
>
> +static void dw8250_set_ldisc(struct uart_port *p, struct ktermios *termios)
> +{
> + struct uart_8250_port *up = up_to_u8250p(p);
> + unsigned int mcr = p->serial_in(p, UART_MCR);
> +
> + if (up->capabilities & UART_CAP_IRDA) {
> + if (termios->c_line == N_IRDA)
> + mcr |= DW_UART_MCR_SIRE;
> + else
> + mcr &= ~DW_UART_MCR_SIRE;
> +
> + p->serial_out(p, UART_MCR, mcr);
> + }
> + serial8250_do_set_ldisc(p, termios);
> +}
Ah, nevermind on the previous question, it's used here...
thanks,
greg k-h
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