+#define SYPCR_SWP 0x1
+#define SYPCR_SWE 0x4
+
+
+void __init m8xx_wdt_install_irq(volatile immap_t *imap, bd_t *binfo)
+{
+ u32 pitc;
+ u32 pitrtclk;
+
+ /*
+ * Fire trigger if half of the wdt ticked down
+ */
+
+ if (imap->im_sit.sit_rtcsc & RTCSC_38K)
+ pitrtclk = 9600;
+ else
+ pitrtclk = 8192;
+
+ if ((wdt_timeout) > (UINT_MAX / pitrtclk))
+ pitc = wdt_timeout / binfo->bi_intfreq * pitrtclk / 2;
+ else
+ pitc = pitrtclk * wdt_timeout / binfo->bi_intfreq / 2;
+
+ out_be32(&imap->im_sit.sit_pitc, pitc << 16);
+
+ out_be16(&imap->im_sit.sit_piscr, (mk_int_int_mask(PIT_INTERRUPT) << 8) | PISCR_PIE | PISCR_PTE);
+
+ if (setup_irq(PIT_INTERRUPT, &m8xx_wdt_irqaction))
+ panic("m8xx_wdt: error setting up the watchdog irq!");
+
+ printk(KERN_NOTICE
+ "m8xx_wdt: keep-alive trigger installed (PITC: 0x%04X)\n", pitc);
+
+}
+
+static void m8xx_wdt_timer_func(unsigned long data);
+
+static struct timer_list m8xx_wdt_timer =
+ TIMER_INITIALIZER(m8xx_wdt_timer_func, 0, 0);
+
+void m8xx_wdt_stop_timer(void)
+{
+ del_timer(&m8xx_wdt_timer);
+}
+
+void m8xx_wdt_install_timer(void)
+{
+ m8xx_wdt_timer.expires = jiffies + (HZ/2);
+ add_timer(&m8xx_wdt_timer);
+}
+
+static void m8xx_wdt_timer_func(unsigned long data)
+{
+ m8xx_wdt_reset();
+ m8xx_wdt_install_timer();
+}
+