From mboxrd@z Thu Jan  1 00:00:00 1970
From: Paul Mundt <lethal@linux-sh.org>
Date: Tue, 23 Mar 2010 08:31:47 +0000
Subject: Re: [PATCH] SH: extend SCI DMA support to work on SCIFA ports
Message-Id: <20100323083147.GA30655@linux-sh.org>
List-Id: <linux-sh.vger.kernel.org>
References: <Pine.LNX.4.64.1003191452370.5412@axis700.grange>
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To: linux-sh@vger.kernel.org

On Fri, Mar 19, 2010 at 02:53:04PM +0100, Guennadi Liakhovetski wrote:
> @@ -1407,8 +1429,21 @@ static void sci_shutdown(struct uart_port *port)
>  static void sci_set_termios(struct uart_port *port, struct ktermios *termios,
>  			    struct ktermios *old)
>  {
> +#ifdef CONFIG_SERIAL_SH_SCI_DMA
> +	struct sci_port *s = to_sci_port(port);
> +#endif
>  	unsigned int status, baud, smr_val, max_baud;
>  	int t = -1;
> +	u16 scfcr = 0;
> +
> +	/*
> +	 * define SH_SCI_LOOPBACK_LINE to the number of the serial interface
> +	 * to put it in the loopback mode
> +	 */
> +#ifdef SH_SCI_LOOPBACK_LINE
> +	if (port->line = SH_SCI_LOOPBACK_LINE)
> +		scfcr |= 1; /* Loopback - testing mode */
> +#endif
>  
What's this all about? If this is something you think is useful enough to
add, it should probably be a module parameter and be settable from the
command line.