On Mon, 18 Oct 2010, dirk.brandewie@xxxxxxxxx wrote:
> From: Alan Cox <alan@xxxxxxxxxxxxxxx>
>
> Not every platform that has generic legacy 8250 ports manages to have them
> clocked the right way or without errata. Provide a generic interface to
> allow platforms to override the default behaviour in a manner that dumps
> the complexity in *their* code not the 8250 driver.
>
> Signed-off-by: Alan Cox <alan@xxxxxxxxxxxxxxx>
> Signed-off-by: Dirk Brandewie <dirk.brandewie@xxxxxxxxx>
Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> ---
> drivers/serial/8250.c | 17 +++++++++++++++++
> include/linux/serial_8250.h | 4 ++++
> 2 files changed, 21 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/serial/8250.c b/drivers/serial/8250.c
> index 24110f6..feb595d 100644
> --- a/drivers/serial/8250.c
> +++ b/drivers/serial/8250.c
> @@ -2674,6 +2674,16 @@ static struct uart_ops serial8250_pops = {
>
> static struct uart_8250_port serial8250_ports[UART_NR];
>
> +static void (*serial8250_isa_config)(int port, struct uart_port *up,
> + unsigned short *capabilities);
> +
> +void serial8250_set_isa_configurator(
> + void (*v)(int port, struct uart_port *up, unsigned short *capabilities))
> +{
> + serial8250_isa_config = v;
> +}
> +EXPORT_SYMBOL(serial8250_set_isa_configurator);
> +
> static void __init serial8250_isa_init_ports(void)
> {
> struct uart_8250_port *up;
> @@ -2719,6 +2729,9 @@ static void __init serial8250_isa_init_ports(void)
> up->port.regshift = old_serial_port[i].iomem_reg_shift;
> set_io_from_upio(&up->port);
> up->port.irqflags |= irqflag;
> + if (serial8250_isa_config != NULL)
> + serial8250_isa_config(i, &up->port, &up->capabilities);
> +
> }
> }
>
> @@ -3177,6 +3190,10 @@ int serial8250_register_port(struct uart_port *port)
> if (port->set_termios)
> uart->port.set_termios = port->set_termios;
>
> + if (serial8250_isa_config != NULL)
> + serial8250_isa_config(0, &uart->port,
> + &uart->capabilities);
> +
> ret = uart_add_one_port(&serial8250_reg, &uart->port);
> if (ret == 0)
> ret = uart->port.line;
> diff --git a/include/linux/serial_8250.h b/include/linux/serial_8250.h
> index 7638dea..1214c4d 100644
> --- a/include/linux/serial_8250.h
> +++ b/include/linux/serial_8250.h
> @@ -77,4 +77,8 @@ extern int setup_early_serial8250_console(char *cmdline);
> extern void serial8250_do_set_termios(struct uart_port *port,
> struct ktermios *termios, struct ktermios *old);
>
> +extern void serial8250_set_isa_configurator(void (*v)
> + (int port, struct uart_port *up,
> + unsigned short *capabilities));
> +
> #endif
> --
> 1.7.2.3
>
> _______________________________________________
> sodaville mailing list
> sodaville@xxxxxxxxxxxxx
> https://www.linutronix.de/mailman/listinfo/sodaville
>
--
To unsubscribe from this list: send the line "unsubscribe linux-serial" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
