Patch by Klaus Heydeck, 12 May 2004:
Using external watchdog for KUP4 boards in mpc8xx/cpu.c;
load_sernum_ethaddr() for KUP4 boards in lib_ppc/board.c;
various changes to KUP4 board specific files
diff --git a/cpu/mpc8xx/cpu.c b/cpu/mpc8xx/cpu.c
index 81d2047..d23d7ee 100644
--- a/cpu/mpc8xx/cpu.c
+++ b/cpu/mpc8xx/cpu.c
@@ -568,6 +568,17 @@
immr->im_ioport.iop_paodr &= ~(WATCHDOG_BIT); /* active output */
immr->im_ioport.iop_padat ^= WATCHDOG_BIT; /* Toggle WDI */
+# elif defined(CONFIG_KUP4K) || defined(CONFIG_KUP4X)
+ /*
+ * The KUP4 boards uses a TPS3705 Watchdog
+ * with the trigger pin connected to port PA.5
+ */
+# define WATCHDOG_BIT 0x0400
+ immr->im_ioport.iop_papar &= ~(WATCHDOG_BIT); /* GPIO */
+ immr->im_ioport.iop_padir |= WATCHDOG_BIT; /* Output */
+ immr->im_ioport.iop_paodr &= ~(WATCHDOG_BIT); /* active output */
+
+ immr->im_ioport.iop_padat ^= WATCHDOG_BIT; /* Toggle WDI */
# else
/*
* All other boards use the MPC8xx Internal Watchdog