fix so that olpc uarts come up enabled.

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2272 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/mainboard/olpc/rev_a/auto.c

@@ -153,7 +153,7 @@ static void main(unsigned long bist)
 	SystemPreInit();
 	msr_init();
 
-	w83627hf_enable_serial(SERIAL_DEV, TTYS0_BASE);
+	cs5536_setup_onchipuart();
 	uart_init();
 	console_init();
 

src/southbridge/amd/cs5536/cs5536_early_setup.c

@@ -155,6 +155,15 @@ static void dummy(void)
 {
 }
 
+/* see page 412 of the cs5536 companion book */
+static int cs5536_setup_onchipuart(void) {
+	msr_t msr;
+	msr.lo = 2;
+	msr.hi = 0;
+	wrmsr(0x5160003a, msr);
+	wrmsr(0x5160003e, msr);
+}
+
 static int cs5536_early_setup(void)
 {
 	msr_t msr;