[SPARC64]: Serial Console for E250 Patch

From: Eddie C. Dost <ecd@brainaid.de>

I have the following patch for serial console over the RSC
(remote system controller) on my E250 machine. It basically adds
support for input-device=rsc and output-device=rsc from OBP, and
allows 115200,8,n,1,- serial mode setting.

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc64/kernel/setup.c

@@ -561,6 +561,8 @@ static int __init set_preferred_console(void)
 		serial_console = 1;
 	} else if (idev == PROMDEV_ITTYB && odev == PROMDEV_OTTYB) {
 		serial_console = 2;
+	} else if (idev == PROMDEV_IRSC && odev == PROMDEV_ORSC) {
+		serial_console = 3;
 	} else {
 		prom_printf("Inconsistent console: "
 			    "input %d, output %d\n",

arch/sparc64/prom/console.c

@@ -99,8 +99,12 @@ prom_query_input_device(void)
 	if (!strncmp(propb, "keyboard", 8))
 		return PROMDEV_ITTYA;
 
+	if (!strncmp (propb, "rsc", 3))
+		return PROMDEV_IRSC;
+
 	if (strncmp (propb, "tty", 3) || !propb[3])
 		return PROMDEV_I_UNK;
+
 	switch (propb[3]) {
 		case 'a': return PROMDEV_ITTYA;
 		case 'b': return PROMDEV_ITTYB;
@@ -136,8 +140,12 @@ prom_query_output_device(void)
 	if (!strncmp(propb, "screen", 6))
 		return PROMDEV_OTTYA;
 
+	if (!strncmp (propb, "rsc", 3))
+		return PROMDEV_ORSC;
+
 	if (strncmp (propb, "tty", 3) || !propb[3])
 		return PROMDEV_O_UNK;
+
 	switch (propb[3]) {
 		case 'a': return PROMDEV_OTTYA;
 		case 'b': return PROMDEV_OTTYB;