Re: [RFC patch] sci_tx_empty for scif serial device

[Paul Mundt <lethal@linux-sh.org>]

On Tue, Apr 21, 2009 at 02:08:47PM +0200, Michael Trimarchi wrote:
> Add the sci_tx_empty function for scif serial device.
> 
> Signed-off-by: Michael Trimarchi <trimarchi@gandalf.sssup.it>
> ---
> diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
> index dbf5357..6cea2c4 100644
> --- a/drivers/serial/sh-sci.c
> +++ b/drivers/serial/sh-sci.c
> @@ -794,6 +794,20 @@ static void sci_free_irq(struct sci_port *port)
>  
>  static unsigned int sci_tx_empty(struct uart_port *port)
>  {
> +	int txroom = SCIF_TXROOM_MAX;
> +
> +#if defined(CONFIG_CPU_SUBTYPE_SH7763)
> +	if (!(port->mapbase = 0xffe00000) &&
> +	    !(port->mapbase = 0xffe08000)) {
> +		txroom = SCIF2_TXROOM_MAX)
> +	}
> +#endif

Uhm.. your version of gcc must be orders of magnitude more magical than
mine, as I see no way for this to compile :-)

> +	if (port->type = PORT_SCIF) {
> +		if (scif_txroom(port) = txroom)
> +			return TIOCSER_TEMT;
> +		return 0;
> +	}
> +
This looks ok anyways, is there some reason this can't be applied to
SH7763, too?