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diff -urN linux-2.6.13.1/include/asm-arm/arch-ixp4xx/timex.h nslu2-2.6.13.1/include/asm-arm/arch-ixp4xx/timex.h
--- linux-2.6.15/include/asm-arm/arch-ixp4xx/timex.h 1970-01-01 00:00:00.000000000 +0000
+++ linux-2.6.15/include/asm-arm/arch-ixp4xx/timex.h 1970-01-01 00:00:00.000000000 +0000
@@ -9,7 +9,12 @@
* We use IXP425 General purpose timer for our timer needs, it runs at
* 66.66... MHz. We do a convulted calculation of CLOCK_TICK_RATE b/c the
* timer register ignores the bottom 2 bits of the LATCH value.
+ * The NSLU2 has a 33.00MHz crystal, so a different FREQ is required.
*/
+#ifdef CONFIG_MACH_NSLU2
+#define FREQ 66000000
+#else
#define FREQ 66666666
+#endif
#define CLOCK_TICK_RATE (((FREQ / HZ & ~IXP4XX_OST_RELOAD_MASK) + 1) * HZ)
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