SPC1920: fix small clock routing bug

Signed-off-by: Markus Klotzbuecher <mk@denx.de>

diff --git a/cpu/mpc8xx/serial.c b/cpu/mpc8xx/serial.c
index 9d0fc6b..53e03f4 100644 (file)
--- a/cpu/mpc8xx/serial.c
+++ b/cpu/mpc8xx/serial.c
@@ -229,15 +229,14 @@ static int smc_init (void)
 
 #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;
+       cp->cp_simode = ((cp->cp_simode & ~0xf000) | 0x7000);   
 #else
        /* Set up the baud rate generator */
        smc_setbrg ();