SMC1 uses external CLK4 instead of BRG on spc1920
diff --git a/cpu/mpc8xx/serial.c b/cpu/mpc8xx/serial.c
index 8ae584f..c8caa79 100644
--- a/cpu/mpc8xx/serial.c
+++ b/cpu/mpc8xx/serial.c
@@ -227,8 +227,17 @@
sp->smc_smcm = 0;
sp->smc_smce = 0xff;
-#ifdef CFG_SPC1920_SMC1_CLK4 /* clock source is PLD */
- *((volatile uchar *) CFG_SPC1920_PLD_BASE+6) = 0xff;
+#ifdef CFG_SPC1920_SMC1_CLK4
+ /* clock source is PLD */
+
+ /* set freq to 19200 Baud */
+ *((volatile uchar *) CFG_SPC1920_PLD_BASE+6) = 0x3;
+ /* configure clk4 as input */
+ im->im_ioport.iop_pdpar |= 0x800;
+ im->im_ioport.iop_pddir &= ~0x800;
+
+ cp->cp_simode = 0x0000;
+ cp->cp_simode |= 0x7000;
#else
/* Set up the baud rate generator */
smc_setbrg ();